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Filed pursuant to Rule 424(b)(4)
Registration Number 333-252157

8,270,500 Ordinary Shares

Pharvaris B.V.

to be converted and renamed

Pharvaris N.V.

(a public company with limited liability incorporated in the Netherlands)

We are offering 8,270,500 ordinary shares. This is our initial public offering and no public market currently exists for our ordinary shares. The initial public offering price is $20.00 per ordinary share.

Our ordinary shares have been approved for listing on the Nasdaq Global Select Market under the symbol “PHVS.”

We are an “emerging growth company” and a “foreign private issuer” as defined under the Securities and Exchange Commission, or SEC, rules and will be subject to reduced public company reporting requirements for this prospectus and future filings. See, “Prospectus Summary—Implications of Being an ‘Emerging Growth Company’ and a Foreign Private Issuer.”

Our business and an investment in our ordinary shares involves a high degree of risk. See “Risk Factors” beginning on page 16 of this prospectus.

Neither the SEC nor any state securities commission has approved or disapproved of these securities or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

|  | PER ORDINARY SHARE |  |  | TOTAL |
Public offering price |  |  | $20.00 |  |  |  | $165,410,000 |
Underwriting discounts and commissions(1) |  |  | $1.40 |  |  |  | $11,578,700 |
Proceeds to us, before expenses |  |  | $18.60 |  |  |  | $153,831,300 |

(1) | See “Underwriting” for additional information regarding underwriting compensation.

Delivery of the ordinary shares is expected to be made on or about February 9, 2021. We have granted the underwriters an option for a period of 30 days from the date of this prospectus to purchase up to an additional 1,240,575 ordinary shares solely to cover overallotments.

Joint Book-Running Managers

Morgan Stanley |  | BofA Securities |  | SVB Leerink
|  | Co-Managers |  |

Oppenheimer & Co. |  | Kempen & Co

Prospectus dated February 4, 2021

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TABLE OF CONTENTS

|  | Page |
About This Prospectus |  |  | ii |
Presentation of Financial and Other Information |  |  | ii |
Trademarks |  |  | ii |
Market and Industry Data |  |  | iii |
Prospectus Summary |  |  | 1 |
The Offering |  |  | 12 |
Summary Consolidated Financial Data |  |  | 14 |
Risk Factors |  |  | 16 |
Cautionary Statement Regarding Forward-Looking Statements |  |  | 69 |
Use of Proceeds |  |  | 71 |
Dividend Policy |  |  | 72 |
Capitalization |  |  | 73 |
Dilution |  |  | 75 |
Selected Consolidated Financial Data |  |  | 77 |
Exchange Rate Information |  |  | 79 |

|  | Page |
Management’s Discussion and Analysis Of Financial Condition and Results Of Operations |  |  | 80 |
Business |  |  | 94 |
Management |  |  | 137 |
Principal Shareholders |  |  | 150 |
Related Party Transactions |  |  | 154 |
Description of Share Capital and Articles of Association |  |  | 157 |
Ordinary Shares Eligible for Future Sale |  |  | 175 |
Material United States and Dutch Income Tax Considerations |  |  | 178 |
Enforceability of Judgments |  |  | 188 |
Underwriting |  |  | 189 |
Expenses of the Offering |  |  | 198 |
Legal Matters |  |  | 199 |
Experts |  |  | 199 |
Where You Can Find More Information |  |  | 200 |
Index to Financial Statements |  |  | F-1 |

Neither we nor the underwriters have authorized anyone to provide any information other than that contained in this prospectus or in any free writing prospectus prepared by or on behalf of us or to which we may have referred you. Neither we nor the underwriters take any responsibility for, or provide any assurance as to the reliability of, any other information that others may give you. Neither we nor the underwriters are making an offer to sell the ordinary shares in any jurisdiction where the offer or sale is not permitted. You should assume that the information appearing in this prospectus is accurate only as of the date on the front cover of this prospectus, regardless of the time of delivery of this prospectus or any sale of the ordinary shares. Our business, financial condition, results of operations and prospects may have changed since the date on the front cover of this prospectus.

For investors outside the United States: neither we nor the underwriters have done anything that would permit this offering or possession or distribution of this prospectus in any jurisdiction, other than the United States, where action for that purpose is required. Persons outside the United States who come into possession of this prospectus must inform themselves about, and observe any restrictions relating to, the offering of the ordinary shares and the distribution of this prospectus outside the United States.

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ABOUT THIS PROSPECTUS

Unless otherwise indicated or the context otherwise requires, all references in this prospectus to “Pharvaris,” “Pharvaris B.V.,” “Pharvaris N.V.,” the “Company,” “we,” “our,” “ours,” “us” or similar terms refer to (i) Pharvaris B.V., together with its subsidiaries prior to the conversion of Pharvaris B.V. into Pharvaris N.V. and (ii) Pharvaris N.V., together with its subsidiaries, after giving effect to the conversion of Pharvaris B.V. into Pharvaris N.V., which is expected to occur immediately prior to the consummation of this offering.

The term “Series A preferred shares” refers to the Company’s convertible preferred shares A issued pursuant to the Share Subscription Agreement, dated as of March 31, 2016, between the Company and certain of its shareholders. The term “Series B preferred shares” refers to the Company’s convertible preferred shares B issued pursuant to the Share Subscription Agreement, dated as of July 25, 2019, between the Company and certain of its shareholders, as amended on July 29, 2020. The term “Series C preferred shares” refers to the Company’s convertible preferred shares C issued pursuant to the Share Subscription Agreement, dated as of November 3, 2020, between the Company and certain of its shareholders. The term “preferred shares” refers (i) to the Series A preferred shares, the Series B preferred shares and the Series C preferred shares, collectively, prior to the conversion of Pharvaris B.V. into Pharvaris N.V. or (ii) preferred shares after conversion of Pharvaris B.V. into Pharvaris N.V., which we may issue to a protective foundation if we decide to implement a protective foundation structure (see “Risk Factors—Dutch corporate law and our Articles of Association contain or may contain provisions that may discourage, delay or prevent a takeover attempt, which could adversely affect the price of our ordinary shares”).

PRESENTATION OF FINANCIAL AND OTHER INFORMATION

We report under International Financial Reporting Standards, or IFRS, as issued by the International Accounting Standards Board, or the IASB. None of the consolidated financial statements in this prospectus were prepared in accordance with generally accepted accounting principles in the United States, or U.S. GAAP. We present our consolidated financial statements in euros and in accordance with IFRS. We have made rounding adjustments to some of the figures included in this prospectus. Accordingly, numerical figures shown as totals in some tables may not be an arithmetic aggregation of the figures that preceded them.

Unless otherwise indicated, all references in this prospectus to “€,” “euro,” “EUR” or “cents” are to the currency introduced at the start of the third stage of the European Economic and Monetary Union pursuant to the treaty establishing the European Community, as amended. All references to “$,” “US$” or “U.S. dollars” are to the lawful currency of the United States.

Solely for the convenience of the reader, certain euro amounts herein have been translated into U.S. dollars at the rate of €1.00 to $1.1705, the average exchange rate quoted as of September 30, 2020 by the European Central Bank. These translations should not be considered representations that any such amounts have been, could have been or could be converted into U.S. dollars at that or any other exchange rate as at that or any other date.

TRADEMARKS

All trademarks, trade names and service marks appearing in this prospectus are the property of their respective owners. Solely for convenience, the trademarks and trade names in this prospectus are referred to without the symbols ® and ™, but such references should not be construed as any indication that their respective owners will not assert, to the fullest extent under applicable law, their rights thereto. We do not intend to use or display other companies’ trademarks or trade names to imply a relationship with, or endorsement or sponsorship of us by, any other companies.

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MARKET AND INDUSTRY DATA

The information in this prospectus that has been sourced from third parties has been accurately reproduced and, as far as we are aware and able to ascertain from the information published by that third-party, no facts have been omitted that would render the reproduced information inaccurate or misleading. Industry publications generally state that their information is obtained from sources they believe reliable but that the accuracy and completeness of such information is not guaranteed and that the projections they contain are based on a number of significant assumptions. We are not aware of any exhaustive industry or market reports that cover or address our specific markets.

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PROSPECTUS SUMMARY

This summary highlights information contained elsewhere in this prospectus. This summary may not contain all the information that may be important to you, and we urge you to read this entire prospectus carefully, including the “Risk Factors,” “Business” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” sections and our consolidated financial statements and the notes thereto, included elsewhere in this prospectus, before deciding to invest in our ordinary shares.

Our Business

Overview

We are a clinical-stage biopharmaceutical company focused on the development and commercialization of innovative therapies for rare diseases with significant unmet need, initially focused on angioedema and other bradykinin-mediated diseases. Our first molecule, PHA121, is a novel, small molecule bradykinin B2-receptor antagonist for the treatment of hereditary angioedema, or HAE. Bradykinin-B2-receptor inhibition is a clinically validated mechanism for the treatment of HAE, as demonstrated by icatibant, which is a bradykinin B2-receptor antagonist approved in Europe in 2008 and in the United States in 2011 (as FIRAZYR). We designed PHA121 to improve upon the therapeutic profile of existing therapies and, through oral delivery, to provide patients with quality of life and convenience that is superior to current standard-of-care HAE treatments, which are injectables. We believe PHA121 has the potential to provide a safe, effective and convenient option for both acute and prophylactic treatments of HAE, in the form of our PHVS416 on-demand rapid exposure product candidate, and for prophylaxis of HAE, in the form of our PHVS719 small daily dose extended-release product candidate. We believe that our product candidates may address a broader range of angioedema attacks than other available treatments since PHA121 blocks the actual signal that leads to angioedema (the interaction of bradykinin, or BK, with the bradykinin B2 receptor), rather than an upstream signal. By blocking the action of bradykinin, we can prevent its aberrant signaling regardless of the pathway that generates it. In our Phase 1 completed trials to-date, we have observed that PHA121 was orally bioavailable and well tolerated at all doses studied, with approximately dose-proportional exposure. We also have successfully demonstrated proof-of-mechanism through a clinical pharmacodynamics, or PD, assessment with the bradykinin challenge, which had been utilized as a validated surrogate assessment for dose selection in the icatibant development program. The data also allowed us to compare the projected therapeutic performance of PHA121 with that of icatibant, but we do not yet have data from the PHA121 Phase 2 study. We plan to efficiently progress PHA121 through clinical development for on-demand and prophylactic use with our on-demand product candidate, PHVS416, and extended release product candidate, PHVS719, respectively. We anticipate commencing our RAPIDe-1 Phase 2 clinical trial of PHVS416 in 2021 and have Phase 2 data for the acute treatment of patients with HAE attacks in 2022. We are also planning to commence a Phase 2 clinical trial for prophylaxis in 2021 using twice-daily dosing of the PHVS416 soft capsules. Our primary objective with this trial is to assess the safety profile of PHVS416 dose regimens for prophylactic treatments in HAE patients. We also expect to conduct a bridging study between our formulation of PHVS719 and PHVS416 in a Phase 1 clinical trial starting in 2021.

PHA121 is a novel, highly potent inhibitor and selective small-molecule bradykinin B2-receptor antagonist and, to our knowledge, the only orally available bradykinin B2-receptor antagonist currently in development. PHA121 has been observed to be a potent inhibitor in vitro as assessed using human recombinant bradykinin B2 receptors (150 pM); ex vivo as studied against endogenous bradykinin B2 receptors in a human umbilical vein model (350 pM); and in vivo in the human bradykinin-challenge model (170 pM). Potency as used in this prospectus refers to the amount of drug required to produce a pharmacological effect of given intensity and is not a measure of therapeutic efficacy. We do not yet have data from the PHA121 Phase 2 clinical trial to evaluate the potential therapeutic efficacy of PHA121 in HAE patients. PHA121 demonstrated 5000-fold selectivity for the

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bradykinin B2 receptor when compared to approximately 170 other molecular targets, including the bradykinin B1 receptor. We designed PHA121 as a new chemotype with properties compatible with oral delivery. We are developing PHA121 for the on-demand setting as PHVS416, which is delivered in a soft capsule designed to rapidly treat symptoms with a single dose. We are also developing PHA121 for the prophylactic setting as PHVS719, which is a small daily dose tablet with an extended release formulation designed for the patient to achieve a steady-state plasma concentration within 72 hours.

In our Phase 1 clinical trials to-date, we have observed rapid exposure and predictable linear pharmacokinetics, or PK, with and without food. In addition, we observed PHA121 to be a potent antagonist of the bradykinin B2 receptor, in vitro and in vivo with healthy volunteers. In our models based on PK data from our Phase 1 clinical trial of PHA121 and published data for icatibant, both in the BK challenge assessment, PHA121 was shown to be consistently 25-fold more potent at inhibiting the effects of administered bradykinin than icatibant on a molar basis. We have not conducted a head-to-head comparison of icatibant to PHA121 in a clinical trial but have compared the published data for icatibant to data from our Phase 1 clinical trial of PHA121. While we believe this comparison to icatibant to be useful and appropriate, the value of this and other comparisons to icatibant in this prospectus may be limited because they are not derived from a head-to-head trial and they are from trials that were conducted under different protocols at different sites and at different times. Without head-to-head data, we will be unable to make comparative claims for our product candidates, if approved.

HAE is a rare and potentially life-threatening genetic condition with symptoms that include episodes of debilitating and often painful swelling in the hands, feet, face (lips and tongue), gastrointestinal tract, urogenital region or airways. Attacks are unpredictable in frequency, location, timing, and severity, with multiple types of triggers. According to scientific publications, patients experience a median of 14 attacks per year, and half of patients experience a potentially life-threatening airway attack at least once in their lifetime. Airway attacks are particularly dangerous and can lead to asphyxiation. If left untreated, attacks can last multiple days and are commonly painful, leading to multiple sick days and even hospitalization. According to HAE International, as of October 2014, HAE affected from 1:50,000 to 1:10,000 individuals globally, or at least 6,600 patients in the U.S. and at least 8,900 patients in the EU.

Global sales of treatments for HAE achieved approximately $2 billion in 2018 and, according to public research reports, are forecast to grow at an approximately 9% compound annual growth rate to $4.3 billion through 2027. Current approved products treat acute HAE attacks in an on-demand setting or seek to prevent or reduce future HAE attacks in a prophylactic setting. Each of these products generally works in one of the following ways: inhibiting the bradykinin B2 receptor, replacing the deficiency in C-1 esterase inhibitor, or C1-INH, activity or inhibiting plasma kallikrein. Currently all standard-of-care therapies are administered by injection, which patients can find challenging despite their efficacy because these therapies often result in painful injection-site reactions (leading some patients to delay treatment and risk attacks), are time consuming to receive (as some need to be administered in a clinic), and are difficult to carry and/or store. We believe HAE patients are in need of alternatives that better meet their objectives for ease of disease treatment, disease control and improved quality of life. We anticipate that there will be strong interest in safe and effective, orally delivered, small-molecule treatments that can match or improve upon the efficacy profile of existing therapies.

Based on results observed from our three completed and one ongoing clinical trials to-date, we believe our product candidates that contain PHA121 will demonstrate advantages and differentiation relative to currently approved HAE therapies and other oral therapies in clinical development. Namely, PHA121’s bradykinin-B2-receptor-inhibition mechanism has a well-established clinical therapeutic profile in a currently approved product in the rapid treatment of acute HAE attacks. We have observed greater potency for PHA121 compared to icatibant in our early clinical trials, potentially resulting in both a smaller therapeutic dose and a longer duration of effect. We evaluated the PD and PK of PHA121 in a bradykinin-challenge model in healthy subjects. The

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bradykinin challenge was validated as a surrogate assessment for dose selection in the original development program for icatibant, as reviewed by the Food and Drug Administration, or FDA, and the European Medicines Agency, or EMA. The clinical dose of icatibant established with the bradykinin challenge has demonstrated successful treatment of HAE attacks in multiple randomized clinical trials and over 10 years of clinical experience. We conducted a proof-of-concept clinical trial testing the effects of BK in healthy volunteers in our bradykinin-challenge trial where we evaluated the effect of PHA121 on cardiovascular parameters affected by bradykinin such as blood pressure, heart rate and cardiac output in healthy volunteers. We observed that PHA121 was more potent in blocking the effects of BK in humans than icatibant, when comparing the PHA121 results of the trial to published data on icatibant. The data from this trial allowed us to generate a PK/PD correlation model. Based on this model and published data on icatibant, we predict the duration of effect for a single oral dose of 12 mg PHA121 will exceed that of 30 mg of icatibant and a single oral dose of 22 mg PHA121 will cover the same duration of effect as two icatibant injections of 30 mg administered six hours apart. Furthermore, analysis based on the results from this trial suggest that therapeutic doses of PHA121 may be at least 20 times smaller than the doses required for oral kallikrein inhibitors in development. In addition, we believe that the observed PK profile of our compound demonstrates the potential of PHVS719 as a prophylactic treatment of HAE by achieving steady-state plasma concentrations within 72 hours. The BK-challenge data was generated in a Phase 1 clinical trial, and we do not yet have data from the PHA121 Phase 2 clinical trial to evaluate the potential efficacy of PHA121 in HAE patients. We have not conducted a head-to-head comparison of icatibant to PHA121 in a clinical trial but have compared the published data for icatibant to data from our Phase 1 clinical trial of PHA121. Potency as used in this prospectus refers to the amount of drug required to produce a pharmacological effect of given intensity and is not a measure of therapeutic efficacy.

We are planning a Phase 2 clinical trial, RAPIDe-1, that will evaluate angioedema symptom relief within four hours of different doses of PHVS416 or placebo while treating acute attacks of patients. We anticipate having Phase 2 data from RAPIDe-1 in 2022. Additional trials may be required by the FDA, EMA or other regulators even if we receive positive data from RAPIDe-1. We are also planning to subsequently conduct a pivotal trial in the on-demand setting.

We are similarly planning two clinical trials in the prophylactic setting. In the first, subjects will be randomized to receive PHVS416 or placebo for three months. The primary objective is to assess the safety profile in HAE patients. For the second, we are planning a registration-directed trial with patients who will be randomized to receive PHVS719 or placebo to assess safety and efficacy in HAE patients. In addition, we also plan to run an open-label extension study in the prophylactic setting with both rollover and non-rollover subjects to collect longer duration safety data.

Differentiation of PHA121

We believe that PHA121, as the molecule underlying both PHVS416 and PHVS719, has the potential to be highly differentiated for both the on-demand and prophylactic settings with the key benefits below:

PHVS416. We believe that PHVS416, an on-demand, rapid exposure soft capsule, has potential to be highly differentiated for patients suffering from acute HAE attacks with the following benefits:

Complete Symptom Resolution |  | •   Clinically validated mechanism of bradykinin-B2-receptor antagonism •   Utilizing same surrogate assessment for dose selection as the development program for icatibant •   More potent inhibitor than icatibant •   Longer half-life than icatibant

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Rapid Onset of Activity |  | •   Exposure exceeds the anticipated threshold therapeutic plasma level (EC85) in 15 minutes, with or without food
Potential Reduced Treatment Burden / Enhanced Patient Convenience |  | •   No injection needed •   Convenient oral formulation enables early treatment of acute HAE attacks •   Capsule reduces treatment burden •   Potential lowest dosage of any oral HAE on-demand treatment

PHVS719. We believe that PHVS719, a prophylactic extended-release tablet designed to be taken in small, daily doses, has potential to be highly differentiated for HAE patients with the following benefits:

Protection From Attacks |  | •   Validated, proven mechanism to address all bradykinin, regardless of pathway
Ideal Release Profile for Prophylactic Use |  | •   Reaches and maintains steady-state concentration within 72 hours •   Appropriate pharmacokinetic profile with standard meals
Potential Reduced Treatment Burden / Enhanced Patient Convenience |  | •   Convenient oral daily dosing with extended-release tablet •   Twice-daily dosing with the potential for once a day •   Potential lowest dosage of any oral HAE treatment; ease of administration •   Well tolerated throughout therapeutic ranges as demonstrated by multiple clinical trials to-date •   No injection needed

Our Pipeline

We plan to develop separate products for on-demand and prophylactic use, PHVS416 and PHVS719 respectively, with both products utilizing the same active ingredient, PHA121. PHVS416 will be a soft-gel capsule, and PHVS719 will be an extended release tablet. We expect to commence our RAPIDe-1 Phase 2 clinical trial of PHVS416 for on-demand use in 2021. We are also planning to commence a Phase 2 clinical trial

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for prophylaxis in 2021. In this trial, we plan to assess twice-daily dosing of PHVS416 soft gel capsules for prophylactic use while we continue to advance the development of our extended-release formulation, PHVS719. A bridging study between our formulation of PHVS719 and PHVS416 in a Phase 1 clinical trial is planned in 2021 before conducting the trial of PHVS719 in the prophylactic setting.

Expansion of the Portfolio

Our ultimate goal is to expand our portfolio with additional programs addressing other BK-mediated diseases, building on our strategic strength and expertise in the bradykinin-B2-receptor pathway. Our approach is to identify additional disease areas and indications with strong scientific rationale, high unmet medical need, a defined target population and significant differentiation potential. We are actively pursuing new synthesis, medicinal chemistry and lead optimization to identify additional and/or follow-on product candidates. In collaboration and discussion with key opinion leaders, we are considering exploratory proof-of-concept studies to validate the potential of bradykinin-B2-receptor antagonism in new indications such as cardiovascular, allergy and immunology, neurological disease and others.

Our Team and Investors

We are led by a strong management team with extensive experience in the biopharmaceutical industry and rare disease drug development, most notably the development of drugs for the treatment of HAE. Our Chief Executive Officer, Berndt Modig, has extensive experience in the pharmaceutical industry, most recently as Chief Financial Officer of Prosensa Holding N.V. and Chief Financial Officer of Jerini AG, which developed and launched icatibant. Our Chief Scientific Officer and Chief Operating Officer, Jochen Knolle, Ph.D. has extensive experience in every aspect of drug discovery as the former Chief Science Officer and Head of R&D at Jerini AG, former Vice President for Medicinal Chemistry and Structural Biology at Axys Pharmaceuticals Inc., and Hoechst AG and Hoechst-Marion-Roussel where he co-invented icatibant. Our Chief Medical Officer, Peng Lu, M.D., Ph.D. previously served as Vice President, Global Program Lead for Rare Diseases at Shire PLC, now Takeda Pharmaceutical Company Limited, where she led the development and successful approval of TAKHZYRO for the prevention of HAE attacks in the U.S., the EU and the rest of the world. Our Chief Early Development Officer, Anne Lesage, Ph.D. brings in deep expertise in drug discovery and GPCR pharmacology, has held various leadership positions at Janssen Pharmaceutica and is inventor on nine patents and author on 45 publications. Our Chief Business Officer, Morgan Conn, Ph.D. has extensive experience in the biopharmaceutical industry including as the Head of Business Development at PTC Therapeutics, Inc. where he was instrumental to a variety of financing events and corporate transactions with leading pharma, biotech, and academic organizations. In addition, we are backed by a group of renowned institutional investors and have raised over $163 million of capital since our inception, including our recent financing that closed on November 5, 2020. Our investors include LSP, Kurma Partners, Idinvest Partners, Foresite Capital, Bain Capital Life Sciences, venBio Partners, Venrock Partners, Viking Global Investors, General Atlantic, and Cormorant Asset Management.

Our Strengths

Our company is built upon the following strengths:

| • |  | Broad strength and expertise in the bradykinin-B2-receptor pathway. Members of the management team include an inventor of icatibant, the leadership team that developed icatibant through European approval, and a key member from the TAKHZYRO development team;

| • |  | PHA121 is an orally available product candidate with a clinically validated mechanism of action that addresses serious unmet medical need in HAE;

| • |  | PHA121 has demonstrated physicochemical properties suitable to formulations as both an on-demand product candidate, PHVS416, and a distinct prophylactic product candidate, PHVS719;

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| • |  | PHA121, compared to icatibant, the currently approved bradykinin B2-receptor inhibitor, demonstrated superior preclinical potency in blocking bradykinin signaling at the bradykinin B2-receptor, and good oral bioavailability and a longer half-life in humans, which has resulted in longer duration of the BK-blocking pharmacodynamic effect in humans;

| • |  | We wholly own intellectual property – including allowed and in-process patent applications – covering PHA121 and additional molecules; and

| • |  | Our scientific experience allows us to leverage deep insight and experience in the bradykinin-B2-receptor pathway to expand our portfolio into other BK-mediated angioedema and BK-mediated diseases beyond angioedema.

Our Strategy

Our strategy is to develop and commercialize therapies that are superior to currently available treatment options and improve patient quality of life and convenience. Our initial approach for HAE and potential expansions into non-hereditary angioedema and other BK-mediated diseases is based upon extensive patient, physician and payer research to identify the key needs in the market. According to our analysis, oral therapy remains the highest unmet need for both on-demand and prophylactic use in HAE. More importantly, our research shows that patients are not willing to accept significantly reduced efficacy or safety with a switch to oral therapy, and so we place a high degree of emphasis on advancing product candidates that we believe can be comparable to or improve upon existing approved therapies in both safety and efficacy.

The key elements of our strategy include:

| • |  | Continue to advance PHA121 through clinical development for on-demand treatment of HAE utilizing a fast-onset formulation, known as PHVS416. We intend to develop and commercialize PHVS416 as a fast-acting, orally available, potent inhibitor and selective treatment for acute HAE. If considered appropriate by the FDA, we plan to pursue an expedited regulatory pathway that could allow us to more quickly provide patients with a potentially more effective oral therapy that is also more convenient.

| • |  | Advance the development of PHA121 for prophylactic treatment of HAE utilizing an extended-release formulation, known as PHVS719. We intend to advance PHVS719 through clinical development as an extended-release prophylactic treatment of HAE. We plan to leverage our clinical data and experience from the development of PHVS416 in the on-demand setting to expedite our efforts in the prophylactic setting. We expect the PK data from our Phase 2 trial RAPIDe-1 of PHVS416 to help select and refine our prophylactic dose for the PHVS719 clinical trials.

| • |  | Expand the range of bradykinin-mediated angioedema indications to which PHVS416 and PHVS719 can be applied. In addition to Type 1 or Type 2 HAE, bradykinin is also an important mediator for other types of non-histaminergic angioedema, such as: non-histaminergic angioedema with normal C1-INH and acquired angioedema (AAE) due to C1-INH deficiency. Currently there are still no approved treatments for these angioedema patients who are unresponsive to conventional antihistamine/glucocorticoid treatment and have a high unmet medical need for effective therapies. Several clinical reports indicate that off-label use of icatibant has successfully treated acute attacks of non-histaminergic angioedema patients, which provides a strong rationale to expand the development PHVS416 and PHVS719 to address such a high unmet medical need.

| • |  | Expand upon our expertise in the bradykinin-B2-receptor pathway. We intend to leverage the strategic strengths, insight, and deep experience of our team in the bradykinin-B2-receptor pathway to identify additional disease areas and indications with strong scientific rationale, high unmet medical need, a defined target population and significant differentiation potential. As such, we will seek to develop

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| follow-on product candidates that serve additional BK-mediated diseases beyond angioedema, such as cardiovascular, allergy and immunology, neurological disease or others.

| • |  | Commercialize our product candidates. We intend to retain economic and commercial ownership of our current product candidates. If approved, we expect to independently commercialize both PHVS416 and PHVS719 in the United States, Europe and certain other countries. As we advance towards regulatory approval for our product candidates, we will establish a focused commercialization and sales infrastructure suitable for HAE.

Recent Developments

Series C Financing

On November 3, 2020, we entered into a subscription agreement pursuant to which we sold 5,826,279 Series C preferred shares for an aggregate investment amount of approximately $80,000,000. The Series C preferred shares were issued on November 5, 2020. See “Related Party Transactions—Transactions with Our Principal Shareholders.”

COVID-19

On January 30, 2020, the World Health Organization declared the outbreak of coronavirus (“COVID-19”) to be a public health emergency of international concern. The COVID-19 outbreak has severely restricted the level of economic activity around the world. In response to the COVID-19 outbreak, the governments of many countries, states, cities and other geographic regions have taken preventative or protective actions, such as imposing restrictions on travel and business operations and advising or requiring individuals to limit or forego their time outside of their homes.

We are monitoring developments surrounding the COVID-19 pandemic and have taken steps to identify and mitigate the adverse effects and risks to the Company as a result of the pandemic. As a result, we have modified our business practices, including implementing work from home arrangements for employees able to perform their duties remotely, restricting nonessential travel, and practicing safe social distancing in our operations. We expect to continue to take actions as may be required or recommended by government authorities or in the best interests of our employees and business partners. While the impact of COVID-19 on the Company’s operations is limited, the extent to which COVID-19 may impact our financial condition or results of operations is uncertain. For instance, the ongoing spread of COVID-19 may continue to interrupt, or delay, clinical trial activities, regulatory reviews, manufacturing activities and supply chain. For example, we experienced an approximate two-month delay in starting the enrollment of our now completed Phase 1 multiple ascending dose study of PHA121 in healthy volunteers as a result of COVID-19. In addition, even with our distributed operations and our observation of social distancing measures, there remains the possibility that key personnel may become ill or are otherwise unable to work, which could affect our operations.

Furthermore, the spread of the virus may affect the operations of key governmental agencies, such as the FDA, which may delay the development of our product candidates. The spread of COVID-19 may also result in the inability of our suppliers to deliver components or raw materials, and the inability of our contract development and manufacturing organizations, or CDMOs, to provide supplies of our product candidates for our planned clinical trials, on a timely basis or at all. Further, COVID-19 may impact the ability of our CROs, including non-clinical CROs, to provide services to support our clinical program.

The COVID-19 pandemic remains a rapidly evolving situation and we do not yet know the full extent of its potential impact on our business operations. The extent to which the COVID-19 pandemic impacts our business will depend on future developments, which are uncertain and cannot be predicted, including new information

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which may emerge concerning the severity of the COVID-19 pandemic and the actions to contain COVID-19 or treat its impact, among others. We will continue to closely monitor the effects of the pandemic. For additional information on risks posed by the COVID-19 pandemic, refer to the section titled “Risk Factors” included elsewhere in this prospectus.

Risks Associated with Our Business

Our business is subject to a number of risks of which you should be aware of before making an investment decision. These risks are discussed more fully in the “Risk Factors” section of this prospectus immediately following this prospectus summary. These risks include, but are not limited to, the following:

| • |  | We have a limited operating history, have generated no revenues to date and have incurred significant losses since our inception. We expect to incur losses over the next several years, will not generate revenues until we are able to commercialize our products and may never achieve profitability, while our net losses are expected to fluctuate significantly.

| • |  | If we are unable to raise capital when needed or on acceptable terms, we may need to delay, reduce or terminate our product development programs and may be unable to continue as a going concern and could ultimately go into insolvency.

| • |  | Our business and operations may be adversely affected by a variety of events outside our control, including, but not limited to, pandemics, epidemics or outbreaks of infectious diseases such as the recent COVID-19 pandemic.

| • |  | We are heavily dependent on the success of our product candidates PHVS416 and PHVS719, which are in early stage development and have not yet been assessed for efficacy in a clinical trial. We cannot give any assurance that either product candidate, or any other compounds in development, will successfully complete clinical trials, receive regulatory approval, be commercialized, or be differentiated in the market. If we are unable to successfully commercialize our product candidates, or experience significant delays in doing so, our business, financial condition, results of operations and prospects would be materially adversely affected.

| • |  | We may experience setbacks in our clinical trials, including delays in commencing, conducting or completing our clinical trials. Moreover, we have established proof-of-mechanism for PHA121 and have designed and advanced our future clinical development program based on a clinical trial that assessed a surrogate assessment, as well as modelling of our results from that trial with additional in vitro and in vivo data and comparisons to published results for other currently available products from different trials. We may not be able to replicate these results or analyses in future clinical trials that assess the endpoints required to obtain regulatory approval or we may have inconclusive or negative results. Any setbacks in our clinical development program could have a material adverse effect on our business, financial condition, results of operations and prospects.

| • |  | Clinical trials of our product candidates may not uncover all possible adverse effects that patients may experience.

| • |  | There can be no assurance that we will be able to obtain or, if obtained, maintain orphan drug status.

| • |  | We have identified material weaknesses in our internal control over financial reporting. If we are unable to successfully remediate these material weaknesses and to maintain an effective system of internal control over financial reporting, we may not be able to accurately report our financial results or prevent fraud, and as a result, shareholders could lose confidence in our financial and other public reporting, which would harm our business and the trading price of our ordinary shares.

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| • |  | We and our partners may be subject to new legislation, regulatory proposals and healthcare payor initiatives that may increase our costs of compliance and adversely affect our or our partners’ ability to market our products, obtain collaborators and raise capital.

| • |  | Manufacturing issues may arise that could increase product and regulatory approval costs or delay commercialization of our products.

| • |  | The market opportunities for our product candidates may also be smaller than currently anticipated, lowering our potential revenue.

| • |  | If our product candidates achieve marketing approval, we expect that they will be priced at a significant premium over competitive generic products. This may make it difficult for us to achieve our business strategy of using our product candidates in combination with existing therapies or replacing existing therapies with our product candidates.

| • |  | Governments and/or pricing authorities, especially in the European Union, often impose strict price and access controls, which may adversely affect our future profitability.

| • |  | The insurance coverage and reimbursement status of newly approved products is uncertain. Failure to obtain or maintain adequate coverage and reimbursement for new or current products could limit our ability to market those products and decrease our ability to generate revenue.

| • |  | We may become exposed to costly and damaging liability claims, either when testing our product candidates in the clinic or after commercialization; and our product liability insurance may not cover all damages from such claims.

| • |  | If third parties on which we depend to conduct our clinical trials do not perform as contractually required, fail to satisfy regulatory or legal requirements or miss expected deadlines, our development program could be delayed with materially adverse effects on our business, financial condition, results of operations and prospects.

| • |  | We are dependent on the services of our management and other clinical and scientific personnel, and if we are not able to retain these individuals or recruit additional management or clinical and scientific personnel, our business will suffer.

| • |  | We are heavily dependent on third-party service providers to perform critical activities related to the research, development and manufacturing of our product candidates. If these third-party service providers fail to perform, our development program could be delayed with materially adverse effects on our business, financial condition, results of operations and prospects.

| • |  | If we are unable to obtain and maintain patent or trade secret protection for any products or product candidates we develop and for our technology, or if the scope of the patent protection obtained is not sufficiently broad, our competitors could develop and commercialize products and technology similar or identical to ours, and our ability to successfully commercialize any product candidates or technology we may develop may be adversely affected.

| • |  | If we fail to make required payments to AnalytiCon Discovery GmbH, or AnalytiCon, under the terms of the agreement pursuant to which we acquired certain of our core intellectual property, AnalytiCon may exercise remedies that would materially and adversely affect our business and results of operations.

| • |  | The market price of our ordinary shares may be highly volatile, and you may not be able to resell our ordinary shares at or above the initial public offering price.

| • |  | We do not currently intend to pay dividends on our securities and, consequently, your ability to achieve a return on your investment will depend on appreciation in the price of our ordinary shares.

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| • |  | We may be a passive foreign investment company, or a PFIC, which could result in adverse U.S. federal income tax consequences to U.S. investors.

Corporate Information

We were incorporated pursuant to Dutch law as Pharvaris B.V. on September 30, 2015. Prior to the consummation of this offering, we intend to convert from Pharvaris B.V. into Pharvaris N.V., a Dutch public company with limited liability. Our principal executive offices are located at J.H. Oortweg 21, 2333 CH Leiden, The Netherlands. Our telephone number is +31 (0)71 203 6410.

Investors should contact us for any inquiries through the address and telephone number of our principal executive offices. Our principal website is www.pharvaris.com. The information contained on, or accessible from, or hyperlinked to, our website is not a part of this prospectus and you should not consider information on our website to be part of this prospectus.

Implications of Being an “Emerging Growth Company” and a Foreign Private Issuer

We qualify as an “emerging growth company” as defined in the Jumpstart Our Business Startups Act of 2012, or the JOBS Act. An emerging growth company may take advantage of relief from certain reporting requirements and other burdens that are otherwise applicable generally to public companies. These provisions include:

| • |  | inclusion of only two years of audited financial statements in addition to any required unaudited interim financial statements with correspondingly reduced “Management’s Discussion and Analysis of Financial Condition and Results of Operations” disclosure in the registration statement of which this prospectus forms a part;

| • |  | an exception from compliance with the auditor attestation requirements of Section 404 of the Sarbanes Oxley Act of 2002, as amended, or the Sarbanes-Oxley Act;

| • |  | reduced disclosure about our executive compensation arrangements in our periodic reports and registration statements; and

| • |  | exemptions from the requirements of holding non-binding advisory votes on executive compensation and golden parachute arrangements.

We may take advantage of these provisions until such time that we cease to qualify as an emerging growth company. We would cease to qualify as an emerging growth company upon the earliest of: (i) the last day of the fiscal year (A) in which we had more than $1.07 billion in annual revenue, (B) we are deemed to be a “large accelerated filer” under the rules of the SEC, or (C) following the fifth anniversary of the date of the completion of this offering (ii) the date on which we issue more than $1.0 billion of non-convertible debt over a three-year period. We may choose to take advantage of some but not all of these reduced reporting requirements. To the extent that we take advantage of these reduced reporting requirements, the information that we provide shareholders may be different than the information you might obtain from other public companies in which you hold equity interests.

In addition, under the JOBS Act, emerging growth companies can delay adopting new or revised accounting standards until such time as those standards apply to private companies. Given that we currently report and expect to continue to report under IFRS as issued by the IASB, we will not be able to avail ourselves of this extended transition period and, as a result, we will adopt new or revised accounting standards on the relevant dates on which adoption of such standards is required by the IASB.

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Upon the consummation of this offering, we will report under the Securities Exchange Act of 1934, as amended, or the Exchange Act, as a non-U.S. company with foreign private issuer status. Even after we no longer qualify as an emerging growth company, as long as we qualify as a foreign private issuer under the Exchange Act we will be exempt from certain provisions of the Exchange Act that are applicable to U.S. domestic public companies, including, but not limited to:

| • |  | the rules under the Exchange Act requiring domestic filers to issue financial statements prepared under U.S. GAAP;

| • |  | the sections of the Exchange Act regulating the solicitation of proxies, consents or authorizations in respect of a security registered under the Exchange Act;

| • |  | the sections of the Exchange Act requiring insiders to file public reports of their stock ownership and trading activities and liability for insiders who profit from trades made in a short period of time; and

| • |  | the rules under the Exchange Act requiring the filing with the SEC of quarterly reports on Form 10-Q containing unaudited financial and other specific information, or current reports on Form 8-K, upon the occurrence of specified significant events.

We may take advantage of these exemptions until such time as we are no longer a foreign private issuer. We would cease to be a foreign private issuer at such time as (i) more than 50% of our outstanding voting securities are held by U.S. residents and (ii) any of the following three circumstances applies: (A) the majority of our executive officers or directors are U.S. citizens or residents, (B) more than 50% of our assets are located in the United States or (C) our business is administered principally in the United States.

Both foreign private issuers and emerging growth companies are also exempt from certain more stringent executive compensation disclosure rules. Thus, even if we no longer qualify as an emerging growth company but remain a foreign private issuer, we will continue to be exempt from the more stringent compensation disclosures required of companies that are not emerging growth companies and will continue to be permitted to follow our home country practice on such matters.

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THE OFFERING

Ordinary shares offered by us |  | 8,270,500 ordinary shares.
Option to purchase additional ordinary shares |  | We have granted the underwriters an option to purchase up to an additional 1,240,575 ordinary shares from us within 30 days of the date of this prospectus in connection with the offering solely to cover overallotments.
Ordinary shares to be outstanding after this offering |  | 31,839,776 ordinary shares (or 33,080,351 ordinary shares if the underwriters exercise in full their overallotment option).
Use of proceeds |  | We estimate that we will receive net proceeds of approximately $151.3 million (€129.3 million) (or approximately $174.4 million (€149.0 million) if the underwriters exercise in full their overallotment option), after deducting the underwriting discounts and commissions and estimated offering expenses.
|  | We currently expect to use the net proceeds from this offering as follows:
|  | •   approximately $50 million (€43 million) to develop our product candidate PHVS416;
|  | •   approximately $61 million (€52 million) to develop our product candidate PHVS719;
|  | •   approximately $12 million (€10 million) for additional clinical development and product discovery; and
|  | •   the remainder for general corporate purposes.
|  | See “Use of Proceeds.”
Directed share program |  | At our request, the underwriters have reserved up to 5% of the ordinary shares offered by this prospectus, for sale at the initial public offering price through a directed share program to certain individuals, including our directors, officers, employees, and certain friends and family members of these persons. The sales will be made at our direction by Morgan Stanley & Co. LLC and its affiliates through a directed share program. The number of ordinary shares available for sale to the general public in this offering will be reduced to the extent that these individuals purchase such reserved shares. Any reserved shares that are not so purchased will be offered by the underwriters to the general public on the same terms as the other ordinary shares offered by

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|  | this prospectus. Shares purchased through the directed share program will not be subject to lockup restrictions with the underwriters, except in the case of shares purchased by any of our directors, officers or employees.
|  | For additional information, see the section titled “Underwriting—Directed Share Program.”
Nasdaq Stock Exchange Listing |  | Our ordinary shares have been approved for listing on the Nasdaq Global Select Market under the symbol “PHVS.”
Risk factors |  | See “Risk Factors” and the other information included in this prospectus for a discussion of factors you should consider before deciding to invest in our ordinary shares.

The number of our outstanding ordinary shares after this offering is based on 23,569,276 ordinary shares outstanding as of September 30, 2020, on an as adjusted basis to give effect to the closing of our Series C financing and on an as further adjusted basis to also give effect to the conversion of all of our preferred shares into ordinary shares and the sale of ordinary shares by us in the offering, but excludes:

| • |  | 1,572,295 of our ordinary shares issuable upon the exercise of options outstanding as of January 1, 2021 at a weighted average exercise price of €2.22 per ordinary share;

| • |  | 1,193,474 of our ordinary shares covered by additional option awards available for future issuance under our equity incentive plan as of January 1, 2021;

| • |  | 154,945 restricted stock units, or RSUs, held by Senior Management and other employees as of February 1, 2021; and

| • |  | options to purchase an aggregate of 873,000 ordinary shares pursuant to grants contemplated in connection with this offering, as further described below, or the IPO Grants.

Unless otherwise indicated, all information contained in this prospectus also reflects and assumes:

| • |  | no exercise by the underwriters of their overallotment option; and

| • |  | no exercise of the options described above.

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SUMMARY CONSOLIDATED FINANCIAL DATA

The following summary consolidated financial data of the Company should be read in conjunction with the sections entitled “Selected Consolidated Financial Data” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and our consolidated financial statements, including the notes thereto, included elsewhere in this prospectus.

The consolidated statement of profit or loss and other comprehensive income (loss) for the years ended December 31, 2019 and 2018 are derived from our audited consolidated financial statements and the related notes thereto included elsewhere in this prospectus. The consolidated statement of profit or loss and other comprehensive income (loss) for the nine months ended September 30, 2020 and 2019 and the statement of financial position data as of September 30, 2020 are derived from our unaudited condensed consolidated financial statements and the related notes thereto included elsewhere in this prospectus. We have prepared the unaudited condensed consolidated financial statements on the same basis as the audited consolidated financial statements, and the unaudited financial data include, in our opinion, all adjustments, consisting only of normal recurring adjustments that we consider necessary for a fair statement of our consolidated financial position and results of operations for these periods. Our historical results are not necessarily indicative of results expected for future periods and our operating results for the nine months ended September 30, 2020 are not necessarily indicative of the results that may be expected for the entire year ending December 31, 2020. You should read this section together with our consolidated financial statements and the related notes and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” included elsewhere in this prospectus.

We maintain our books and records in euros, and we prepare our consolidated financial statements in accordance with IFRS, as issued by the IASB.

Consolidated Statements of Profit or Loss and Other Comprehensive Income (Loss)

|  | For the Nine Months Ended September 30, |  |  | For the Year Ended December 31, |
|  | 2020 |  |  | 2019 |  |  | 2019 |  |  | 2018 |
|  | € |  |  | € |  |  | € |  |  | € |
Research and development expenses |  |  | (11,797,986 | ) |  |  | (3,154,877 | ) |  |  | (5,684,562 | ) |  |  | (3,645,413 | )
General and administrative expenses |  |  | (3,447,208 | ) |  |  | (1,409,972 | ) |  |  | (2,325,719 | ) |  |  | (668,121 | )
Total operating expenses |  |  | (15,245,194 | ) |  |  | (4,564,849 | ) |  |  | (8,010,281 | ) |  |  | (4,313,534 | )
Net foreign exchange loss |  |  | (176,602 | ) |  |  | (3,927 | ) |  |  | (16,881 | ) |  |  | (380 | )
Loss before income tax |  |  | (15,421,796 | ) |  |  | (4,568,776 | ) |  |  | (8,027,162 | ) |  |  | (4,313,914 | )
Income tax expense |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Total comprehensive loss for the year, net of tax |  |  | (15,421,796 | ) |  |  | (4,568,776 | ) |  |  | (8,027,162 | ) |  |  | (4,313,914 | )
Loss attributable to: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity holders of the Company |  |  | (15,421,796 | ) |  |  | (4,568,776 | ) |  |  | (8,027,162 | ) |  |  | (4,313,914 | )
Total comprehensive loss attributable to: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity holders of the Company |  |  | (15,421,796 | ) |  |  | (4,568,776 | ) |  |  | (8,027,162 | ) |  |  | (4,313,914 | )
Loss per share attributable to equity holders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic and diluted loss per share(1)(2) |  |  | (3.18 | ) |  |  | (0.94 | ) |  |  | (1.66 | ) |  |  | (0.89 | )
As adjusted basic and diluted loss per share(3) |  |  | (0.65 | ) |  |  | (0.19 | ) |  |  | (0.34 | ) |  |  | (0.18 | )

(1) | Basic loss per share is calculated by dividing the loss attributable to equity holders of the Company by the weighted average number of issued and outstanding ordinary shares during the year.

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(2) | Diluted loss per share is calculated by adjusting the weighted average number of ordinary shares outstanding to assume conversion of all dilutive potential ordinary shares. Because the Company is loss making, all of its potential ordinary shares had an antidilutive effect and thus have been excluded from the computation of diluted loss per share.

(3) | The unaudited as adjusted net loss per share data gives effect to the closing of our Series C financing and the conversion of all of our outstanding preferred shares and is based on 23,569,276 ordinary shares outstanding immediately prior to the consummation of this offering.

The following table presents our summary statement of financial position as of September 30, 2020:

| • |  | on an actual basis;

| • |  | on an as adjusted basis to give effect to the closing of our Series C financing;

| • |  | on an as further adjusted basis to also give effect to the conversion of all of our preferred shares into ordinary shares and the sale of ordinary shares by us in the offering, after deducting the underwriting discounts and commissions and estimated offering expenses.

Consolidated Statements of Financial Position Data

|  | As of September 30, 2020 |
|  | Actual |  |  | As Adjusted |  |  | As Further Adjusted |
|  | € |  |  | € |  |  | € |
Cash and cash equivalents |  |  | 41,948,476 |  |  |  | 109,131,809 |  |  |  | 238,419,550 |
Total assets |  |  | 43,054,251 |  |  |  | 110,237,584 |  |  |  | 239,525,325 |
Total liabilities |  |  | 4,364,129 |  |  |  | 4,364,129 |  |  |  | 4,364,129 |
Total equity |  |  | 38,690,122 |  |  |  | 105,873,455 |  |  |  | 235,161,195 |

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RISK FACTORS

You should carefully consider the risks and uncertainties described below and the other information in this prospectus before making an investment in our ordinary shares. Our business, financial condition or results of operations could be materially and adversely affected if any of these risks occurs, and as a result, the market price of our ordinary shares could decline and you could lose all or part of your investment. This prospectus also contains forward-looking statements that involve risks and uncertainties. See “Cautionary Statement Regarding Forward-Looking Statements.” Our actual results could differ materially and adversely from those anticipated in these forward-looking statements as a result of certain factors.

Risks Related to Our Financial Position

We have a limited operating history, have generated no revenues to date and have incurred significant losses since our inception. We expect to incur losses over the next several years, will not generate revenues until we are able to commercialize our products and may never achieve profitability, while our net losses are expected to fluctuate significantly.

We are a clinical-stage biopharmaceutical company with a limited operating history upon which you can evaluate our business and prospects. Since inception, we have incurred significant operating losses and have generated no revenues as we focused on our discovery efforts and developing our product candidates. We expect that it will be several years, if ever, before we have a product candidate ready for commercialization. To date, we have financed our operations primarily through sales of equity and associated private placements. We expect to continue to incur significant expenses and increasing operating losses for the foreseeable future. We anticipate that our expenses will increase substantially if and as we:

| • |  | continue clinical development of our current product candidates;

| • |  | seek to identify additional product candidates and initiate clinical trials for such additional product candidates;

| • |  | acquire or in-license other products and technologies or enter into collaboration arrangements with regards to product discovery;

| • |  | seek marketing approvals for our product candidates that successfully complete clinical trials;

| • |  | establish a sales, commercialization and distribution infrastructure to commercialize any products for which we may obtain marketing approval;

| • |  | maintain, expand and protect our intellectual property portfolio;

| • |  | hire additional personnel;

| • |  | add operational, financial and management information systems and personnel, including personnel to support our product development and planned future commercialization efforts; and

| • |  | continue to incur increased costs as a result of operating as a public company.

To become and remain profitable, we must develop and eventually commercialize a product or products with significant market potential. This will require us to be successful in a range of challenging activities, including completing clinical trials of our product candidates, obtaining marketing approval for these product candidates and manufacturing, commercializing and selling those products for which we may obtain marketing approval. We may never succeed in these activities and, even if we do, we may never generate revenues that are significant or large enough to achieve profitability. If we do achieve profitability, we may not be able to sustain or increase profitability on a quarterly or annual basis. Our failure to become and remain profitable would decrease the value of our business and could impair our ability to raise capital, maintain our discovery and preclinical development efforts, expand our business or continue our operations and may require us to raise additional capital that may dilute the ownership interest of shareholders. A decline in the value of our business could also cause shareholders to lose all or part of their investment.

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We will need substantial additional funding to continue our operations. If we are unable to raise capital when needed or on acceptable terms, we may need to delay, reduce or terminate our product development programs and may be unable to continue as a going concern and could ultimately go into insolvency.

We expect our expenses to increase in parallel with our ongoing activities, particularly as we continue our discovery and preclinical development collaborations to identify new clinical candidates and initiate clinical trials of, and seek marketing approval for, our product candidates. In addition, if we obtain marketing approval for any of our product candidates, we expect to incur significant commercialization expenses related to product sales, marketing, manufacturing and distribution. Because the outcome of any clinical trial or preclinical study is highly uncertain, we cannot reasonably estimate the actual amounts necessary to successfully complete the development and commercialization of our product candidates. If we do not have sufficient cash and cash equivalents to fund the completion of the research and clinical development of our programs, we will be required to seek a significant amount of additional funds by raising additional equity, convertible financing or non-dilutive financing such as debt financing arrangements, strategic transactions or other means. We may also delay, reduce the scope of, eliminate or divest clinical programs, partner with others or divest one or more of our activities and consider other cost reduction initiatives, such as withholding initiation or expansion of clinical trials or research and slowing down patient recruitment of clinical trials. We may also be required to sell or license to others technologies or clinical product candidates or programs that we would prefer to develop and commercialize ourselves. In the event we are not able to generate sufficient funds from these measures, we may be unable to continue as a going concern, our business, financial condition and/or results of operations could be materially and adversely affected and we may ultimately go into insolvency.

In addition, even if we believe we have sufficient funds for our current or future operating plans, we may seek additional capital if market conditions are favorable or if we have specific strategic considerations. Our future funding requirements will depend on many factors, including:

| • |  | the progress and cost of our discovery and preclinical development;

| • |  | the progress and cost of our clinical trials, including payments of patient cost, clinical investigator cost and payments to CROs that are assisting with our sponsored clinical trials, and other research and development activities;

| • |  | the cost and timing of obtaining regulatory approval to commence further clinical trials;

| • |  | the costs associated with any future investigator-sponsored clinical trials;

| • |  | the cost of filing, prosecuting, defending and enforcing any patent applications, claims, patents and other intellectual property rights;

| • |  | the cost and timing of obtaining sufficient quantities of our product candidates for clinical trials by establishing our contracted and/or own production capacities;

| • |  | the costs and capital expenditures associated with process optimizations and preclinical and clinical manufacturing;

| • |  | the terms and timing of any collaborative, licensing and other arrangements that we may establish;

| • |  | the cost of acquiring or licensing additional products or technologies, if any;

| • |  | the cost of preparing for launch and commercialization of our product candidates; and

| • |  | the cost of operating as a public company in the United States.

There can be no assurance that funding will be available in a timely manner, on favorable terms, or at all, or that such funds, if raised, would be sufficient to enable us to continue to implement our long-term business strategy. Also, general conditions in the global economy, including market volatility resulting from the COVID-19 pandemic or other factors, could adversely impact our ability to access capital as and when needed. If we are unable to obtain sufficient funding in a timely manner or on commercially acceptable terms, we may have

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to delay, reduce the scope of, eliminate or divest clinical programs, partner with others or divest one or more of our activities, and consider other cost reduction initiatives, such as downsizing our operations, withholding initiation or expansion of clinical trials or research, and slowing down patient recruitment of clinical trials. In the event we are not able to generate sufficient funds, we may be unable to continue as a going concern and our business, financial condition and/or results of operations could be materially and adversely affected and could reduce the price of our ordinary shares and we may ultimately go into insolvency. In addition, any perceived or actual inability by us to finance our clinical development program and other business activities, including as a result of required milestone and royalty payments to third parties, may cause the market price of our ordinary shares to decline.

Raising additional capital may cause dilution to our existing shareholders, restrict our operations or require us to relinquish rights to our product candidates or technologies.

We may seek additional funding through a combination of equity offerings, debt financings, collaborations and/or licensing arrangements. To the extent that we raise additional capital through the sale of equity or convertible debt securities, your ownership interest will be diluted, and the terms may include liquidation or other preferences that adversely affect your rights as a holder of our ordinary shares. The incurrence of indebtedness and/or the issuance of certain equity securities could result in increased fixed payment obligations and could also result in certain additional restrictive covenants, such as limitations on our ability to incur additional debt and/or issue additional equity, limitations on our ability to acquire or license intellectual property rights and other operating restrictions that could adversely impact our ability to conduct our business. In addition, issuance of additional equity securities, or the possibility of such issuance, may cause the market price of our ordinary shares to decline. In the event that we enter into collaborations and/or licensing arrangements in order to raise capital, we may be required to accept unfavorable terms, including relinquishing or licensing to a third-party on unfavorable terms our rights to technologies or product candidates that we otherwise would seek to develop or commercialize ourselves or potentially reserve for future potential arrangements when we might be able to achieve more favorable terms. Additional funding may not be available to us on acceptable terms, or at all. If we are unable to obtain funding on a timely basis, we may be required to significantly curtail one or more of programs or cease operations altogether.

Exchange rate fluctuations could negatively affect our financial condition.

Our consolidated financial statements are presented in euros. We mainly operate via our Dutch and Swiss entities, but we also conduct business in North America and the United Kingdom. Therefore, we have expenses denominated in U.S. dollars and British pound sterling in connection with, among other things, our sponsored clinical trials, purchase of drug product for our clinical trials, process development and the prosecution and maintenance of our intellectual property portfolio. As a result, our business and share price may be affected by fluctuations between the euro and the U.S. dollar and the euro and the British pound sterling, which may have a significant impact on our reported results of operations and cash flows from period to period.

We have identified material weaknesses in our internal control over financial reporting. If we are unable to successfully remediate these material weaknesses and to maintain an effective system of internal control over financial reporting, we may not be able to accurately report our financial results or prevent fraud, and as a result, shareholders could lose confidence in our financial and other public reporting, which would harm our business and the trading price of our ordinary shares.

Effective internal controls over financial reporting are necessary for us to provide reliable financial reports and, together with adequate disclosure controls and procedures, are designed to prevent fraud. Any failure to implement required new or improved controls, or difficulties encountered in their implementation could cause us to fail to meet our reporting obligations. Section 404 of the Sarbanes-Oxley Act requires management of public companies to develop and implement internal control over financial reporting to evaluate the effectiveness

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thereof. A material weakness is a deficiency or a combination of deficiencies in internal control over financial reporting such that there is a reasonable possibility that a material misstatement of our financial statements will not be prevented or detected on a timely basis. In connection with the preparation of our consolidated financial statements for the fiscal year ended December 31, 2019, we concluded that there were material weaknesses in the design of our internal control over financial reporting across the principles for each component of the COSO framework at the entity level (i.e. control environment, risk assessment, monitoring, information & communication and control activities) and accordingly, across our business and IT processes. The material weaknesses that we identified related to:

| • |  | The lack of consistent and documented risk assessment procedures and control activities related to our financial reporting, among which a sufficient level of (management) review and approval, manual processes, roles and responsibilities, and adequate application and controls over information technology; and

| • |  | The lack of maintaining a sufficient complement of personnel commensurate with our accounting and reporting requirements, and able to: (i) design and maintain formal accounting policies, procedures and controls over the fair presentation of our financial statements; (ii) analyze, record and disclose complex accounting matters timely and accurately, including share-based compensation arrangements and other non-routine transactions; and (iii) design and maintain controls over the preparation and review of journal entries and financial statements, including maintaining appropriate segregation of duties.

Although several oversight and control activities are performed, not all activities are formalized and documented properly. In addition, where control activities are dependent on information used in a control, we do not perform or document controls to determine the completeness and accuracy of such information. We also did not have controls in place to monitor control activities and identify control deficiencies. Currently, we have only three designated finance employees. To address these material weaknesses, we will need to add personnel and continue to develop and implement new financial processes. We intend to take steps to remediate the material weaknesses described above through hiring additional qualified accounting and financial reporting personnel, and further evolving our accounting processes and policies. We will not be able to fully remediate these material weaknesses until these steps have been completed and have been operating effectively for a sufficient period of time. We cannot assure you that we will be able to successfully remediate the material weaknesses or that other material weakness will not be discovered in the future. If we do not remediate these issues or if we fail to design and operate effective internal controls in the future, it could result in material misstatements in our financial statements and potentially require us to restate our financial statements which may result in the trading value of our ordinary shares being materially and adversely affected.

Our management will be required to assess the effectiveness of our internal controls over financial reporting on an annual basis pursuant to SOX 404(a), beginning with our Form 20-F for the year ended December 31, 2022. However, for as long as we are an “emerging growth company” under the JOBS Act, our independent registered public accounting firm will not be required to attest to the effectiveness of our internal control over financial reporting pursuant to Section 404(b). We could be an “emerging growth company” for up to five years following this offering. The rules governing the standards that must be met for management to assess our internal control over financial reporting are complex and require significant documentation, testing and possible remediation. Our management may not be able to effectively and timely implement controls and procedures that adequately respond to the increased regulatory compliance and reporting requirements that will be applicable to us as a U.S. public company and an assessment of the effectiveness of our internal control over financial reporting by an independent registered public accounting firm in accordance with the provisions of Section 404 could detect additional significant deficiencies or material weaknesses that our management’s assessment might not. Undetected material weaknesses in our internal controls could lead to financial statement restatements, require us to incur the expense of remediation and investors may lose confidence in the accuracy and completeness of our financial reports which could cause the market price of our ordinary shares to decline and also restrict our future access to the capital markets. We could be also subject to sanctions or investigations by Nasdaq, the SEC or other regulatory authorities.

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Our tax liability may be materially different from what is reflected in our income tax provisions and related balance sheet accounts.

We are subject to taxation in the Netherlands, Switzerland and other jurisdictions. Our future effective income tax rate will be impacted by a number of factors, including the geographic composition of our worldwide taxable income and our ability to allocate debt and expenses effectively. If legislators, tax authorities or government agencies in the jurisdictions in which we operate were to change applicable tax laws and regulations (for example, as a result of the various global, regional and local initiatives to reform the international tax framework, such as the base erosion and profit shifting project undertaken by the Organization for Economic Co-operation and Development and anti-tax avoidance measures proposed by the European Committee) or successfully challenge the manner in which our income taxes are currently recognized or calculated or the transfer pricing policies employed by us (including policies set forth in any advance pricing agreements entered into with any taxing authorities), our effective income tax rate could increase, which would adversely impact our cash flow and profitability. Furthermore, in many of these jurisdictions, the tax laws and regulations are very complex and are open to different interpretations and application. The final determination of tax by means of an assessment or an audit could be materially different from our tax provisions and accruals and may negatively impact our financial results.

Our ability to use our net operating losses to offset future taxable income may be subject to certain limitations.

Our ability to use our net operating losses, or NOLs, in the Netherlands and Switzerland is currently limited and may be further limited. In particular, the use of NOLs is subject to limitation in Switzerland, and may expire if unused after a seven-year period. Furthermore, as a result of Dutch corporate income tax law, tax loss carry-forwards were generally subject to a time limitation of nine years from the year these tax losses were incurred but legislation has been enacted that decreased the carry-forwards time limitation of tax losses incurred after December 31, 2018 from nine years to six years. On October 5, 2020, the Dutch Government has submitted a legislative proposal to the Dutch Parliament to limit the amount of tax losses that can be taken into account in a profitable year. Pursuant to the proposal, as of January 1, 2022 both the carry forward and carry back loss relief will be limited to 50% of the taxable profit to the extent it exceeds EUR 1 million, calculated per financial year. Further, tax losses will remain available to be used against future taxable profits for an indefinite period. Considering that no grandfathering rule has been proposed, it is expected that this will apply to tax losses incurred as of 2022 and also to tax losses that are available for carry forward in 2022 pursuant to the currently applicable rules. This means that, if the legislative proposal is adopted, the final year in which tax losses incurred in year-end December 31, 2013 can be used in full against profits is the financial year 2021 and tax losses incurred in subsequent years will be carry-forward indefinitely but subject to the new limitation as of January 1, 2022.

Risks Related to the Development and Clinical Testing of Our Product Candidates

We are heavily dependent on the success of our product candidates PHVS416 and PHVS719 , which are in early stage development and have not yet been assessed for efficacy in a clinical trial. We cannot give any assurance that either product candidate, or any other compounds in development, will successfully complete clinical trials, receive regulatory approval, be commercialized or be differentiated in the market.

We do not have any drugs that have received regulatory approval and may never be able to develop marketable products. We expect that a substantial portion of our efforts and expenses for the foreseeable future will be devoted to the clinical development of our product candidates, PHVS416 and PHVS719, and as a result, our business currently depends heavily on the successful development, regulatory approval and commercialization of these product candidates. We have not yet tested our product candidates in patients with HAE, and to-date we only have data from pre-clinical studies and Phase 1 clinical trials in healthy volunteers. We have not conducted a head-to-head comparison of icatibant or any other drug candidate to PHA121 in a clinical trial. We have compared the published data for icatibant to data from our Phase 1 clinical trial of PHA121. Accordingly, the value of comparisons to icatibant in this prospectus may be limited because they are not derived from a head-to-head trial and they are from trials that were conducted under different protocols at

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different sites and at different times. Without head-to-head data, we will be unable to make comparative claims for our product candidates, if approved. Future clinical trials may not confirm our analyses to-date. The development of PHVS416 and PHVS719 has been and will continue to be a time-consuming and costly process, and may leave us with insufficient resources to advance other programs and product candidates. We cannot be certain that any PHA121-containing product candidate, including PHVS416 and PHVS719, will receive regulatory approval or be successfully commercialized, even if we receive regulatory approval. The research, testing, manufacturing, safety, efficacy, labeling, approval, sale, advertising promotion, commercialization and distribution of our product candidates are, and will remain, subject to comprehensive regulation by the FDA in the United States, the European Union and the EMA in Europe and regulatory authorities in other countries, with regulations differing from country to country. We will not be permitted to market our drug candidates in the United States or Europe until we receive approval of a New Drug Application, or NDA, from the FDA or a marketing authorization, or MA, from the European Commission (based on the positive opinion of the EMA), respectively. We have not submitted any marketing authorization applications for any of our product candidates. NDAs and MAs must include extensive preclinical and clinical data and supporting information to establish the drug candidate’s safety and effectiveness for each desired indication. The preclinical and clinical development of our product candidates is susceptible to the risk of failure inherent at any stage of drug development, including failure to demonstrate efficacy or safety, the occurrence of adverse events that are severe or medically or commercially unacceptable, our or our partners’ failure to comply with trial protocols, applicable regulatory requirements, and industry standards, or a determination by the FDA or any comparable foreign regulatory authority that a product candidate may not continue development or be approved in accordance with our development plans or at all. We cannot guarantee that any preclinical studies and clinical trials will be conducted as planned or completed on schedule, if at all, or that the results of such trials will be sufficient to support regulatory approval for our product candidates. Failure to obtain regulatory approval for any of our product candidates PHVS416 and PHVS719 or any other product candidate in the United States, Europe or other jurisdictions will prevent us from commercializing and marketing these products in such jurisdictions.

Even if we were to successfully obtain approval from the FDA, EMA and comparable foreign regulatory authorities for our product candidates, any approval might contain significant limitations related to use restrictions for specified age groups, warnings, precautions or contraindications, or may be subject to burdensome post-approval study or risk management requirements. We may also be limited in our ability to advertise, promote and/or market our product candidates in a way that successfully differentiates them in the market. For example, we may not be able to position our product as safer, more effective, more convenient, or better for a patient’s quality of life. Furthermore, we will still need to develop a commercial infrastructure, or otherwise develop relationships with collaborators to commercialize, establish a viable pricing structure and obtain coverage and adequate reimbursement from third-party payors, including government healthcare programs. If we, or our collaborators, are unable to successfully commercialize any product candidate, we may not be able to generate sufficient revenue to continue our business.

Our business and operations may be adversely affected by a variety of events outside our control, including pandemics, epidemics or outbreaks of infectious diseases, such as the recent COVID-19 pandemic.

A wide variety of events beyond our control, including natural or man-made disasters, power shortages, fires, extreme weather conditions, pandemics, epidemics or outbreaks of infectious diseases, political unrest or other events could disrupt our business or operations or those of our development partners, manufacturers, regulators or other third parties with whom we conduct business now or in the future. These events may cause businesses and government agencies to be shut down, supply chains to be interrupted, slowed, or rendered inoperable, and individuals to become ill, quarantined, or otherwise unable to work and/or travel due to health reasons or governmental restrictions. For instance, the spread of COVID-19 has impacted the global economy and impacted our operations, including through interruptions of our, or delays to, clinical trial activities, regulatory reviews, manufacturing activities and supply chain. The COVID-19 outbreak has delayed, and may continue to delay, enrollment in our clinical trials due to prioritization of hospital resources toward the outbreak

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or other factors, and some patients may be unwilling to enroll in our trials or be unable to comply with clinical trial protocols if quarantines impede patient movement or interrupt healthcare services, which would delay our ability to conduct clinical trials or release clinical trial results and could delay our ability to obtain regulatory approvals and commercialize our product candidates. For example, we experienced an approximate two-month delay in starting the enrollment of our now completed Phase 1 multiple ascending dose study of PHA121 in healthy volunteers as a result of COVID-19. In addition, even with our distributed operations and our observation of social distancing measures, there remains the possibility that key personnel may become ill or are otherwise unable to work, which could affect our operations.

Furthermore, the spread of the virus may affect the operations of key governmental agencies, such as the FDA, which may delay the development of our product candidates. The spread of an infectious disease, including COVID-19, may also result in the inability of our suppliers to deliver components or raw materials, and the inability of our CDMOs to provide supplies of our product candidates for our planned clinical trials, on a timely basis or at all. Further, it may impact the ability of our CROs, including non-clinical CROs, to provide services to support our clinical program. In addition, hospitals may reduce staffing and reduce or postpone certain treatments in response to the spread of an infectious disease. Such events may result in a period of business disruption, and in reduced operations, or doctors and medical providers may be unwilling to participate in our clinical trials, any of which could materially affect our business, financial condition and results of operations. The extent to which the COVID-19 pandemic impacts our business will depend on future developments, which are uncertain and cannot be predicted, including new information which may emerge concerning the severity of the COVID-19 pandemic and the actions to contain COVID-19 or treat its impact, among others. If we are unable to meet our milestones it might jeopardize our funding opportunities.

In addition, the COVID-19 pandemic has already caused, and is likely to result in further, significant disruptions and uncertainties in global financial markets, which may reduce our ability to access capital on favorable terms or at all. A recession, depression or other sustained adverse market event resulting from the spread of COVID-19 could also materially and adversely affect our business and the value of our ordinary shares. The ultimate impact of the COVID-19 pandemic or a similar health epidemic is uncertain and subject to change. To the extent the COVID-19 pandemic adversely affects our business and financial results, it may also have the effect of heightening many of the other risks described in this “Risk Factors” section, such as those relating to our clinical and preclinical development operations, manufacturing activities, the supply chain for our ongoing and planned clinical trials and our ability and need to raise additional capital to support our operations.

Disruptions at FDA, EMA and other government agencies caused by funding shortages or global health concerns such as COVID-19 could hinder their ability to hire, retain or deploy key leadership and other personnel, or otherwise prevent new or modified products from being developed, cleared or approved or commercialized in a timely manner or at all, which could negatively impact our business.

The ability of the FDA, EMA and other comparable government agencies to review and clear or approve new products can be affected by a variety of factors, including government budget and funding levels, statutory, regulatory, and policy changes, ability to hire and retain key personnel and accept the payment of user fees, and other events that may otherwise affect their ability to perform routine functions. Government funding of government agencies that fund research and development activities is subject to the political process, which is inherently fluid and unpredictable. Disruptions at the FDA, EMA and other agencies may also slow the time necessary for new drugs or modifications to cleared or approved drugs to be reviewed and/or approved by necessary government agencies, which would adversely affect our business. For instance, in response to COVID-19, on March 10, 2020, the FDA announced its intention to postpone most foreign inspections of manufacturing facilities and products. Foreign pre-approval and for-cause inspection assignments that are not deemed mission-critical remain temporarily postponed, while those deemed “mission-critical” are being considered for inspection on a case-by-case basis. Regulatory authorities outside the United States may adopt similar restrictions or other policy measures in response to the COVID-19 pandemic. In addition, regulatory agencies have generally reduced face-to-face interactions relative to the pre-pandemic situation which may

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impact our ability to reach consensus with regulators. If a prolonged government shutdown occurs, or if global health concerns continue to prevent the FDA, EMA or other regulatory authorities from conducting their regular inspections, reviews, or other regulatory activities, it could significantly impact the ability of the FDA, EMA or other regulatory authorities to timely review and process our regulatory submissions, which could have a material adverse effect on our business.

We may not be able to design and develop an extended-release formulation.

Our current strategy includes developing an extended-release formulation for the PHA121 prophylactic indication. We have not yet identified a specific extended-release formulation. If we pursue this development strategy, we expect to file for and obtain patents covering the specific formulation developed, as well as its use for the treatment of HAE. There can, however, be no assurance that such an extended-release formulation will be successfully developed in a timely manner, that adequate patent protection can be obtained or that any such formulation would provide us with a commercial advantage. If we are unable to develop this extended-release formulation on our own, we may need to in-license patented technology to do so. Many third parties have patents covering technologies and manufacturing processes needed to develop and make extended release formulations and there can be no assurance that we would be able to obtain rights to such patents on attractive financial terms, if at all.

We may experience setbacks in our clinical trials, including delays in commencing, conducting or completing our clinical trials. Moreover, we have established proof-of-mechanism for PHA121 and have designed and advanced our future clinical development program based on a clinical trial that assessed a surrogate endpoint, as well as modelling of our results from that trial with additional in vitro and in vivo data and comparisons to published results for other currently available products from different trials. We may not be able to replicate these results or analyses in future clinical trials that assess the endpoints required to obtain regulatory approval or we may have inconclusive or negative results. Any setbacks in our clinical development program could have a material adverse effect on our business, financial condition, results of operations and prospects.

Clinical trials are expensive and complex. Each trial can take many years to complete and have uncertain outcomes. Failure of a product can occur at any stage of the testing, including later phases of clinical trials despite having progressed through preclinical and early phase clinical trials, for a variety of reasons, such as changes in formulation of the product, differences in patient populations, changes in trial and manufacturing protocols and complexities of larger, multi-center trials, among others. The results from preclinical or early phase clinical trials of a product candidate may not predict the results that will be obtained in later phase clinical trials of the product candidate. For example, we have established proof-of-mechanism for PHA121 and have designed and advanced our future clinical development program based on a clinical trial that assessed a surrogate assessment, as well as modelling of our results from that trial with additional in vitro and in vivo data and comparisons to published results for other currently available products from different trials. We may not be able to replicate these results or analyses in future clinical trials that assess the endpoints required to obtain regulatory approval. We, the FDA or other applicable regulatory authorities may suspend or terminate clinical trials of a product candidate at any time for numerous reasons, including, but not limited to, a belief that subjects participating in such trials are being exposed to unacceptable health risks or adverse side effects, or other adverse experiences or findings. Even if clinical trials are successful, before granting approval to any product candidate, regulatory authorities can request additional clinical trials, including with larger patient numbers, find deficiencies in the manufacturing processes or facilities upon which we rely and change their approval policies or regulations or their prior guidance to us during clinical development in a manner that renders our clinical data insufficient for approval.

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We have, and may continue to experience numerous setbacks during, or as a result of, the clinical trial process that experienced could delay or prevent the commencement, conduct and completion of clinical trials or the commercialization of our current and any future programs, such as:

| • |  | delays in reaching a consensus with regulatory agencies on the design or implementation of our clinical trials, including with respect to our strategy for sharing Phase 1 data between PHVS416 and PHVS719 programs and designs for improving the efficiency of our clinical development path;

| • |  | delays in obtaining regulatory approval or ethics committee approval to commence a clinical trial;

| • |  | delays in reaching agreement on acceptable terms with prospective contract research organizations, or CROs, and clinical trial sites;

| • |  | failure of CROs to adequately supervise investigators;

| • |  | failure to recruit sufficient investigators or recruit and enroll sufficient subjects for our clinical trials in a timely manner or at all, including due to the COVID-19 pandemic;

| • |  | delay or failure in having subjects complete a trial or return for post-treatment follow-up, including due to the COVID-19 pandemic;

| • |  | failure to obtain and maintain the required institutional review board, or IRB, or ethics committee approval at each clinical trial site;

| • |  | clinical sites or investigators deviating from trial protocol or dropping out of a trial;

| • |  | lack of adequate funding to continue a clinical trial;

| • |  | delays in sufficiently developing, characterizing or controlling a manufacturing process suitable for advanced clinical trials;

| • |  | clinical trials of our product candidates producing negative or inconclusive results, which may result in our deciding, or regulators requiring us, to conduct additional clinical trials or abandon product development programs; or

| • |  | failure of ourselves or any third-party manufacturers, contractors or suppliers to comply with regulatory requirements, maintain adequate quality controls, or be able to provide sufficient product supply to conduct and complete clinical trials of our product candidates.

Moreover, principal investigators for our clinical trials may serve as scientific advisors or consultants to us from time to time and receive compensation in connection with such services. Under certain circumstances, we may be required to report some of these relationships to the FDA or comparable foreign regulatory authorities. The FDA or comparable foreign regulatory authority may conclude that a financial relationship between us and a principal investigator has created a conflict of interest or otherwise affected interpretation of the study. The FDA or comparable foreign regulatory authority may therefore question the integrity of the data generated at the applicable clinical trial site and the utility of the clinical trial itself may be jeopardized. This could result in a delay in approval, or rejection, of our marketing applications by the FDA or comparable foreign regulatory authority, as the case may be, and may ultimately lead to the denial of marketing approval of one or more of our product candidates.

If we suffer any material delays, negative results or other setbacks in our clinical trials or if our clinical trials are put on clinical hold or terminated, we may incur increased costs or be unable to continue development of PHA121, including our product candidates PHVS416 and PHVS719, which could have a material adverse effect on our business, financial condition, results of operations and prospects.

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If we experience delays or difficulties in the enrollment of patients in clinical trials, our receipt of necessary regulatory approvals could be delayed or prevented and expenses for development of our product candidates could increase.

We may not be able to initiate or continue clinical trials for our product candidates if we are unable to locate and enroll a sufficient number of eligible patients to participate in these trials to demonstrate safety and efficacy. We are currently conducting early phase clinical trials, with a Phase 2 trial in the on-demand setting to commence first and provide critical data for dose selection for the prophylaxis indication. We do not know whether planned or ongoing clinical trials will enroll subjects in a timely fashion, require redesign of essential trial elements or be completed on our projected schedule. In particular, because we are focused on patients with HAE, which is a rare disease, our ability to enroll eligible patients in trials may be limited or may result in slower enrollment than we anticipate. In addition, competitors have ongoing clinical trials for product candidates being studied for the same indications as our product candidates, and patients who would otherwise be eligible for our clinical trials may instead enroll in clinical trials of our competitors’ product candidates. Patient enrollment can also be affected by a number of other factors including:

| • |  | the eligibility criteria for the study in question;

| • |  | the perceived risks and benefits of the product candidate under study;

| • |  | the efforts to facilitate timely enrollment in clinical trials;

| • |  | the availability of existing or experimental treatments affecting our ability to recruit patients;

| • |  | the inability to identify and maintain a sufficient number of trial sites, many of which may already be engaged in other clinical trial programs, including some that may be for the same disease indication;

| • |  | the patient referral practices of physicians;

| • |  | the proximity and availability of clinical trial sites for prospective patients;

| • |  | any delays and difficulties in enrollment due to the COVID-19 pandemic;

| • |  | ambiguous or negative interim results of our clinical trials, or results that are inconsistent with earlier results;

| • |  | feedback from the FDA, EMA and any comparable foreign regulatory authority, data safety monitoring boards, or a comparable foreign regulatory authority, or results from earlier stage or concurrent preclinical studies and clinical trials, that might require modifications to the protocol;

| • |  | decisions by the FDA, EMA and any comparable foreign regulatory authority or us, or recommendations by data safety monitoring boards, to suspend or terminate clinical trials at any time for safety issues or for any other reason; and

| • |  | unacceptable risk-benefit profile, perceived or actual, or unforeseen safety issues or adverse effects.

Our inability to enroll a sufficient number of patients for our clinical trials would result in significant delays, may result in increased development costs for our product candidates, and could also require us to abandon one or more clinical trials altogether, any of which could cause a material adverse effect on our business, financial position and results of operations.

Clinical trials of our product candidates may not uncover all possible adverse effects that patients may experience.

Clinical trials are conducted in a limited sample of the patient population for the disease or condition under study; the actual patient population may have significantly more variability than the clinical trial subjects. In addition, clinical trials are, by design, limited with respect to the number of subjects and the duration of exposure to the product candidate. As a result of such limitations, we cannot be sure that all side effects of our product

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candidates may be uncovered during our clinical trials or that a complete safety profile of our product candidates will be identified. Further, even larger clinical trials may not identify rare serious adverse effects or the duration of such studies may not be of sufficient length to identify when those events may occur. There have been other products that have been approved by the regulatory authorities but for which safety concerns have been uncovered following approval. Such safety concerns have led to labeling changes, the imposition of other regulatory requirements (e.g., Risk Evaluation and Mitigation Strategy or REMs, or post-authorization safety studies, or PASS) or withdrawal of products from the market, and any of our product candidates may be subject to similar risks.

Although to date we have not seen evidence of significant safety concerns with our product candidates currently in clinical trials, patients treated with our products, if approved, may experience adverse reactions and it is possible that the FDA or other regulatory authorities may ask for additional safety data as a condition of, or in connection with, our efforts to obtain approval of our product candidates. If safety problems occur or are identified after our product candidates reach the market, we may, or regulatory authorities may require us to amend the labeling of our products, institute a REMs or PASS, recall our products or even withdraw approval for our products.

Clinical development is a lengthy and expensive process with an uncertain outcome, and results of earlier studies and trials as well as data from any interim analysis of ongoing clinical trials may not be predictive of future trial results. Clinical failure can occur at any stage of clinical development.

Clinical testing is expensive and can take many years to complete, and its outcome is inherently uncertain. Failure can occur at any time during the clinical trial process. Although product candidates may demonstrate promising results in early clinical (human) trials and preclinical (animal) studies, they may not prove to be safe or effective in subsequent clinical trials. For example, the results of animal studies may not accurately predict human experience. Likewise, early clinical trials may not be predictive of eventual safety or effectiveness results in larger-scale pivotal clinical trials. In this prospectus we discuss the potency of PHA121 as shown in preclinical and Phase 1 clinical trials. Potency as used in this prospectus refers to the amount of drug required to produce a pharmacological effect of given intensity and is not a measure of therapeutic efficacy. We do not yet have data from the PHA121 Phase 2 clinical trial to evaluate the potential therapeutic efficacy of PHA121 in HAE patients. The results of preclinical studies and early clinical trials, as well as data from interim analysis of ongoing clinical trials, may not be predictive of the results of ongoing or future clinical trials. In addition, the studies and trials of other products with similar mechanisms of action to our product candidates may not be predictive of our clinical trial results. There can be significant variability in safety and/or efficacy results between different trials of the same product candidate due to numerous factors, including changes in trial protocols, differences in composition of the patient populations, adherence to the dosing regimen and other trial protocols and the rate of dropout among clinical trial participants. Product candidates in later phase clinical trials may fail to show the desired safety and efficacy traits despite having progressed through preclinical studies and earlier clinical trials. In addition to the safety and efficacy trials of any product candidate, clinical trial failures may result from a multitude of factors including flaws in trial design, dose selection, placebo effect and patient enrollment criteria. A number of companies in the pharmaceutical industry have suffered significant setbacks in advanced clinical trials due to lack of efficacy or adverse safety profiles, notwithstanding promising results in earlier trials, and it is possible that our product candidates will as well which may have an adverse effect on our business and the value of the ordinary shares.

We may not be able to conduct, or contract others to conduct, animal testing in the future, which could harm our research and development activities.

Certain laws and regulations relating to drug development require us to test our product candidates on animals before initiating clinical trials involving humans. Animal testing activities have been the subject of controversy and adverse publicity. Animal rights groups and other organizations and individuals have attempted to stop animal testing activities by pressing for legislation and regulation in these areas and by disrupting these

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activities through protests and other means. To the extent the activities of these groups are successful, our research and development activities may be interrupted or delayed.

Risks Related to Regulatory Approval of Our Clinical Development Programs and Our Product Candidates

Clinical development is subject to extensive regulation, which can be costly and time-consuming to comply with, and we may not obtain approvals for performing clinical trials or for marketing any of our product candidates.

We are not permitted to conduct clinical trials with or market any product candidate until we obtain authorization from the appropriate regulatory authorities. We must obtain authorization for conducting clinical trials with any product candidate and for marketing any product candidate from the appropriate regulatory authority of each jurisdiction in which we wish to perform clinical trials with or market our product candidates.

Since the 1990s, many companies have tried but failed to discover oral B2 antagonists, as the bradykinin-B2-receptor proved to be a difficult target for the development of orally available antagonists. Current treatment guidelines also recommend against the use of the traditionally used oral HAE medications, such as antifibrinolytics (tranexamic acid or epsilon aminocaproic acid), due to limited efficacy. As our product candidates are based on novel technologies, it is difficult to predict the time or costs associated with the regulatory approval process or be certain of our ability to successfully commence, conduct, and complete clinical development, or obtain the necessary regulatory and reimbursement approvals required for the commercialization of our product candidates PHVS416 and PHVS719. As discussed under “—Risks Related to the Development and Clinical Testing of Our Product Candidates—We may experience setbacks in our clinical trials, including delays in commencing, conducting or completing our clinical trials, as well as inconclusive or negative results, all of which could have a material adverse effect on our business, financial condition, results of operations and prospects,” we or our partners may experience any number of unfavorable outcomes during or as a result of preclinical studies and clinical trials which could delay or prevent regulatory approval of our product candidates, or negatively impact our management’s credibility, our value and our operating results.

We may invest substantial time and resources in preclinical studies, clinical trials, manufacturing and the preparation and submission of various regulatory applications without any assurance that we will obtain regulatory approval or recoup our investment. The FDA and other regulatory authorities exercise substantial discretion with respect to the development and approval of drug product candidates. The number, size and design of preclinical studies and clinical trials that will be required for regulatory approval will vary depending on the program, the primary indication and the specific regulations and guidance documents applicable to any particular program. The FDA and other regulatory authorities can delay, limit or deny (i) clinical trial development (e.g., placing a clinical trial under clinical hold) and (ii) approval of a program for many reasons, including:

| • |  | manufacturing related issues or concerns;

| • |  | concerns relating to the product candidate’s safety or efficacy;

| • |  | concerns relating to the design, control or conduct of preclinical studies and clinical trials including the use of placebo or active controls in blinded studies;

| • |  | negative or ambiguous results of any preclinical or clinical trial;

| • |  | concerns relating to the sufficiency of clinical trial results;

| • |  | the failure of more advanced clinical results to confirm positive results from preclinical studies or earlier clinical trials; or

| • |  | the development or observation of unexpected safety issues, adverse events or adverse side effects.

Should any of these or other factors affecting our development programs or product candidates occur, regulatory approval of our product candidates could be denied, delayed or have conditions placed upon it. Failure

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to obtain regulatory approval in a timely manner, in a limited manner or at all would have a material adverse effect on our business, financial condition, results of operations or prospects.

Additionally, effective as of January 31, 2020, the United Kingdom withdrew from the European Union, a process referred to as “Brexit”. Since a significant proportion of the regulatory framework in the United Kingdom is derived from European Union directives and regulations, the final resolution of the withdrawal of the United Kingdom from the European Union could materially impact the regulatory regime with respect to the approval of any of our product candidates in the United Kingdom or the European Union. Any delay in obtaining, or an inability to obtain, any marketing approvals, as a result of Brexit or otherwise, would prevent us from commercializing our product candidates in the United Kingdom and/or the European Union and restrict our ability to generate revenue and achieve and sustain profitability. If any of these outcomes occur, we may be forced to restrict or delay efforts to seek regulatory approval in the United Kingdom and/or European Union for any of our product candidates, which could significantly and materially harm our business.

There can be no assurance that we will be able to obtain or, if obtained, maintain orphan drug status.

We currently do not have orphan drug designations in respect of our PHVS416 and PHVS719 product candidates. There is no assurance that we will be able to obtain orphan drug designations for our product candidates in indications that are important to our business or if obtained, to gain orphan drug exclusivity for our product candidates in indications that are important for our business. Orphan drug exclusivity confers market exclusivity, subject to certain limitations, upon the first product to receive marketing approval by the relevant regulatory authority for the jurisdiction and entails the right to market exclusively the product for the specified indication, during a maximum of ten years for the European Union and during a period of seven years in the United States. The period of exclusivity in the European Union may be reduced to six years if, at the end of the fifth year, the product no longer meets the criteria for orphan drug designation if, among other things, it is established that the product is sufficiently profitable not to justify market exclusivity.

Even if we obtain orphan drug exclusivity for a product in the U.S., an approval may be granted to other applicants of a similar product for the same indication if we are unable to supply sufficient quantities of the product, we consent to such an approval, or if the product of a second applicant is deemed to be clinically superior to our product. Changes to the current regulatory frameworks governing orphan drugs may also impact existing and future market exclusivities provided as a result of orphan drug designation. Even if we were to succeed in obtaining and maintaining market exclusivity for any future products through orphan drug status, the orphan drug regulations would not preclude competitors from developing or marketing different products for the same indications to which our programs are directed, or from independently developing versions of our products for different indications. Further, we may lose orphan drug exclusivity if the EMA or the FDA determines that the request for designation was materially defective. If we fail to obtain or maintain orphan exclusivity for any future products, or if the commercial value of market exclusivity is diminished, our competitive position or financial and commercial prospects could be materially adversely affected.

If we fail to comply with ongoing regulatory obligations and restrictions following regulatory approval of any product candidate, regulatory authorities may take enforcement action against us, for example, any regulatory approval granted could be withdrawn or revoked and sale of any products could be suspended or financial penalties could be imposed.

If any of our product candidates are approved for commercialization by the FDA or another regulatory authority, we would be subject to extensive regulatory requirements over, among other things, product manufacturing, testing, labeling, packaging, storage, advertising, promotion, marketing, distribution, export, import, adverse event reporting and record keeping. These requirements include submissions of safety and other post-commercialization information and reports, drug establishment registration and drug listing requirements, current Good Manufacturing Practices, or cGMP, relating to manufacturing, quality control, quality assurance

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and corresponding maintenance of records and documents. In addition, we would be subject to other requirements regarding the distribution of drug samples to physicians. We and our suppliers, CDMOs and contract testing laboratories would also be subject to inspection by the FDA or other regulatory authorities to determine compliance with these requirements. In addition, facilities in the European Union that manufacture any of our product candidates must be licensed by the relevant regulatory authorities. In the United States, there are also certain state requirements with respect to drug manufacturing and distribution with which we must comply.

The FDA, or other regulatory authorities, may also impose significant limitations on the uses or marketing of our approved product candidates, which could reduce the potential market for any products. The FDA and other regulatory authorities closely regulate the post-approval advertising, promotion, and commercialization of drugs to ensure drugs are marketed only for the approved indications and in accordance with the provisions of the approved labeling. The FDA imposes stringent restrictions on manufacturers’ communications regarding use of their products and if we promote our products beyond their approved indications or in other ways that violate FDA requirements, we may be subject to enforcement action for, among other things, off-label promotion. In the EU, promotion of prescription-only drugs to the general public as well as off-label promotion are strictly prohibited and can result in significant fines and reputational damage. For the United States, alleged, or potential violations of the Federal Food, Drug, and Cosmetic Act relating to the promotion of prescription drugs may lead to investigations alleging violations of federal and state health care fraud and abuse laws, as well as state consumer protection laws. Advertising, promotion, and marketing activities may also give rise to litigation by competitors.

The FDA, or other regulatory authorities, may also impose requirements for costly post-commercialization studies or clinical trials and surveillance to monitor the safety or efficacy of an approved drug. Previously unknown problems with the drug may result in restrictions on the commercialization of the product and could include withdrawal of the drug from the market.

In addition, as discussed under “—Risks Related to the Development and Clinical Testing of Our Product Candidates—We and our partners may be subject to new legislation, regulation, regulatory proposals and healthcare payor initiatives that may increase our costs of compliance and adversely affect our or our partners’ ability to market our products, obtain collaborators and raise capital,” new statutory requirements or additional regulations or initiatives may be enacted. If we are slow or unable to adapt to changes in existing requirements or the adoption of new requirements or policies, or if we are not able to maintain regulatory compliance, we may lose any marketing approval that we may have obtained and we may not achieve or sustain profitability, which would adversely affect our business, prospects, financial condition and results of operations. Failure to comply with the requirements of the FDA and other applicable regulatory authorities may also subject us to administrative or judicially imposed sanctions, including civil and criminal penalties, injunctions, product seizure or recall, import bans, restrictions on the conduct of our operations, total or partial suspension of production and refusal to approve a pending new drug application, or NDA, and financial penalties. If we are subject to any of these sanctions, our competitive position or financial and commercial prospects could be materially adversely affected.

We and our partners may be subject to new legislation, regulation, regulatory proposals and healthcare payor initiatives that may increase our costs of compliance and adversely affect our or our partners’ ability to market our products, obtain collaborators and raise capital.

In various jurisdictions including the United States, there have been and continue to be a number of legislative and regulatory changes and proposed changes regarding the healthcare system that could prevent or delay marketing approval of our product candidates, subject us to more stringent drug labeling and post-commercialization testing or restrict or regulate post-approval activities and affect our ability, or the ability of our future collaborators, to profitably sell any product candidates for which we obtain marketing approval.

Among policy makers and payors in various jurisdictions, there is significant interest in promoting changes in healthcare systems with the stated goals of containing healthcare costs, improving quality and/or expanding

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access. For example, in the United States, the Patient Protection and Affordable Care Act, as amended by the Health Care and Education Reconciliation Act (collectively, the ACA), enacted in 2010, has had a significant impact on the healthcare industry. The ACA increased federal oversight of private health insurance plans and included a number of provisions designed to reduce Medicare expenditures and the cost of health care generally, to reduce fraud and abuse, and to provide access to increased health coverage.

Since its enactment there have been judicial, Presidential and Congressional challenges to certain aspects of the ACA, and we expect there will be additional challenges and amendments to the ACA. While Congress has not enacted legislation to comprehensively repeal the ACA, at least two bills affecting the implementation of the ACA have been signed into law, including the repeal, effective January 1, 2019, of the tax based shared responsibility payment imposed by the ACA on certain individuals who fail to maintain qualifying health coverage for all or part of a year, which is commonly referred to as the “individual mandate.” In December 2018, a federal district court in Texas ruled that the ACA’s individual mandate, without the penalty that was repealed effective January 1, 2019, was unconstitutional and could not be severed from the ACA. As a result, the court ruled the remaining provisions of the ACA were also invalid. The Fifth Circuit Court of Appeals affirmed the district court’s ruling that the individual mandate was unconstitutional, but it remanded the case back to the district court for further analysis of whether the mandate could be severed from the ACA (i.e., whether the entire ACA was therefore also unconstitutional). The Supreme Court of the United States granted certiorari on March 2, 2020, heard oral arguments on the case on November 10, 2020 and the case is expected to be decided in 2021.

Further, the Trump administration took several executive actions, including the issuance of a number of executive orders, that could impose significant burdens on, or otherwise materially delay, the FDA’s ability to engage in routine regulatory and oversight activities such as implementing statutes through rulemaking, issuance of guidance, and review and approval of marketing applications. An under-staffed FDA could result in delays in the FDA’s responsiveness or in its ability to review submissions or applications within the established Prescription Drug User Fee Act time frames, issue regulations or guidance, or implement or enforce regulatory requirements in a timely fashion or at all. In the coming years, additional legislative and regulatory changes could be made to governmental health programs that could significantly impact pharmaceutical companies and the success of our product candidates. As such, we cannot predict what effect the ACA or other healthcare reform initiatives that may be adopted in the future will have on our business.

In addition, other legislative changes have been proposed and adopted in the United States since the ACA was enacted. These changes include the Budget Control Act of 2011, which, among other things, led to aggregate reductions to Medicare payments to providers of up to 2% per financial year effective April 1, 2013 and, due to subsequent legislation, will stay in effect through 2030, unless additional Congressional action is taken, with the exception of a temporary suspension of the payment reduction from May 1, 2020 through December 31, 2020 enacted as part of the CARES Act. In January 2013, the American Taxpayer Relief Act of 2012 was signed into law, which, among other things, further reduced Medicare payments to several types of providers, and increased the statute of limitations period for the government to recover overpayments to providers from three to five years. These new laws may result in additional reductions in Medicare and other healthcare funding.

Further, in the United States, there has been heightened governmental scrutiny recently over the manner in which drug manufacturers set prices for their marketed products. For instance, on September 13, 2020, President Trump issued an executive order directing the Secretary of Health and Human Services to pursue implementation of two new payment models under which Medicare would test whether paying no more than the “most-favored-nation” price for certain included drugs and biological products covered under Part B and Part D, respectively, would mitigate poor clinical outcomes and increased Medicare expenditures associated with high drug costs. If implemented, the “most-favored-nation” price would generally reflect the lowest price, after certain adjustments, for a pharmaceutical product sold in an economically-comparable member country of the Organisation for Economic Co-operation and Development. The U.S. Congress has also continued to conduct inquiries into the prescription drug industry’s pricing practices. At the state level in the United States, legislatures are also

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increasingly passing legislation and states are implementing regulations designed to control spending on, and patient out of pocket costs for, drug products.

In some countries outside the United States, the proposed pricing for a treatment must be approved before it may be lawfully marketed. In addition, in some markets, the pricing of prescription drugs is subject to government control and reimbursement which may in some cases be unavailable. The requirements governing drug pricing vary widely from country to country. There can be no assurance that any country that has price controls or reimbursement limitations for pharmaceutical products will allow favorable reimbursement and pricing arrangements for any of our product candidates that may be approved. Historically, pharmaceutical products launched in the European Union do not follow price structures of the United States and generally tend to have significantly lower prices.

These efforts and other healthcare reform measures that may be adopted in the future may result in more rigorous coverage criteria and in additional downward pressure on the price that we receive for any approved product, and any reduction in reimbursement from any government program may result in a similar reduction in payments from private payors. The implementation of cost containment measures or other healthcare reforms may prevent us from being able to generate revenues, attain profitability, or commercialize our product candidates, if approved.

We cannot predict the likelihood, nature or extent of government regulation that may arise from future legislation or administrative action in the United States, the European Union or another jurisdiction, or the effect that any such future legislation or administrative action may have on our business.

Risks Related to Our Operations

Due to our limited resources and access to capital, we must prioritize development of certain programs and our decision to pursue these programs may prove to be unsuccessful as they may never receive regulatory approval or achieve profitability.

Because we have limited resources and access to capital to fund our operations, we must decide which product candidates to pursue and the amount of resources to allocate to each product candidate. As such, we are currently primarily focused on the development of PHVS416 and PHVS719. These, and future decisions concerning the allocation of capabilities, infrastructure, management and financial resources towards particular programs or therapeutic areas may not lead to the development of viable commercial products and may divert resources from better opportunities. Similarly, these and future decisions to delay or terminate product development programs could cause us to miss valuable opportunities. If we make incorrect determinations regarding the market potential of our product candidates or misread trends in the pharmaceutical industry, our business, financial condition and results of operations could be materially adversely affected.

If we cannot manufacture our product candidates in sufficient amounts, with CDMOs or ourselves, at acceptable costs and on a timely basis, we may be unable to supply sufficient product candidates for preclinical or clinical trials or to support commercialization of our product candidates, if approved.

We do not own or operate manufacturing facilities and have no plans to build our own clinical or commercial-scale manufacturing capabilities. We cannot ensure that our suppliers will remain in business, have sufficient capacity or supply to meet our needs, or that they will not be purchased by one of our competitors or another company that is not interested in continuing to work with us. If we cannot establish sufficient supply through alternative third-party CDMOs or in our own facilities should we develop these, our ability to conduct the planned and future clinical trials and our plans for commercialization would be materially adversely affected.

In addition, we currently rely on a single CDMO for the production of certain of our product candidates and, as a result, face certain additional risks relating to our manufacturing operations. A single significant disruptive

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event at the manufacturing operations of our CDMO can have a material adverse effect on our business, prospects, financial condition and results of operations. In addition, our CDMO is located in the United Kingdom and we cannot rule out the possibility of delays in obtaining our product candidates as a result of changes in the governing regulatory framework, including import/export restrictions, due to Brexit. Business interruption insurance may not adequately compensate us for any losses that may occur and we would have to bear the additional cost of any disruption. For instance, if we were to experience an unexpected loss of supply, or if our CDMO was unable to meet our demand for our product candidates or their services, we could experience delays in our research and development activities, planned clinical trials or commercialization of approved products. In the first quarter of 2021, we learned that our CDMO discovered a packaging issue with certain batches of packaging of soft capsules for our RAPIDe-1 trial. The CDMO is currently investigating the issue, and the start of the trial may be affected. We continue to anticipate that we will commence the RAPIDe-1 trial for on-demand treatment of HAE attacks in 2021 and that it will read out in 2022. Finding alternative CDMOs or suppliers of acceptable quality who can deliver appropriate volumes at acceptable cost may be challenging. Moreover, the long transition periods involved in the change of CDMOs and suppliers, if necessary, would significantly delay our clinical trials and the commercialization of our product candidates, if approved.

We will need to work with CDMOs that can meet all applicable FDA and other regulatory authority requirements on an ongoing basis. If the manufacturing process is changed during the course of product development, the FDA or other regulatory authorities could require us to repeat some or all previously conducted trials or conduct additional trials to obtain bridging data, which could delay or impede our ability to obtain marketing approval. If we or our CDMOs are unable to reliably produce and release our product candidates to specifications acceptable to FDA or other regulatory authorities, we may not obtain or maintain the approvals we need to further develop, conduct clinical trials for, and commercialize such product candidates. Similarly, approval of our product candidates could be delayed or denied if the intended manufacturing site fails to pass the required preapproval inspection. Even if we obtain regulatory approval for any of our product candidates, there is no assurance that either we or our CDMOs will be able to manufacture the approved product to specifications acceptable to the FDA or other regulatory authorities, to produce it in sufficient quantities to meet the requirements for the potential launch of the product, or to meet potential future demand. Any of these challenges could delay completion of clinical trials, require clinical trials to obtain bridging data or the repetition of one or more clinical trials, increase clinical trial costs, delay approval of our product candidates, impair commercialization efforts, increase our cost of goods, and have a material adverse effect on our business, financial condition, results of operations and growth prospects.

We expect that development of our own manufacturing facilities could provide us with enhanced control of material supply for our product candidates for the clinical trials and the commercial market. However, we have no experience as a company in developing and operating a manufacturing facility and may never be successful in developing our own manufacturing facility or capability should we decide to do so. In particular, if we do pursue the construction of our own manufacturing facilities, we may not complete construction in a timely manner, if at all. Such facilities would also need to be inspected and approved by the FDA and other regulatory agencies before these facilities can be used to manufacture our product candidates, which may subject us to unforeseen delays in our manufacturing efforts and additional regulatory inspections.

For all of the above reasons, our current and anticipated future dependence upon others for the manufacture of our product candidates or products may adversely affect our future profit margins and our ability to commercialize any products that receive marketing approval on a timely and competitive basis.

Manufacturing issues may arise that could increase product and regulatory approval costs or delay commercialization of our products.

As the manufacturing processes are scaled up they may reveal manufacturing challenges or previously unknown impurities that could require resolution in order to proceed with our planned clinical trials and obtain regulatory approval for the commercial marketing of our products. In the future, we may identify manufacturing issues or impurities that could result in delays in the clinical program and regulatory approval for our products,

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increases in our operating expenses, or failure to obtain or maintain approval for our products. Our reliance on third-party manufacturers entails risks, including the following:

| • |  | the inability to meet our product specifications, including product formulation, and quality requirements consistently;

| • |  | a delay or inability to procure or expand sufficient manufacturing capacity;

| • |  | manufacturing and product quality issues, including those related to scale-up of manufacturing;

| • |  | a failure to comply with cGMP and similar quality standards;

| • |  | termination or nonrenewal of manufacturing agreements with third parties in a manner or at a time that is costly or damaging to us;

| • |  | operations of our third-party manufacturers or suppliers could be disrupted by conditions unrelated to our business or operations, including the bankruptcy of the manufacturer or supplier;

| • |  | carrier disruptions or increased costs that are beyond our control; and

| • |  | the failure to deliver our products under specified storage conditions and in a timely manner.

Any of these events could lead to delays in any clinical trial we may undertake, failure to obtain regulatory approval or impact our ability to successfully commercialize any product candidates. Some of these events could be the basis for FDA or other regulatory authorities’ action, including injunction, recall, seizure, or total or partial suspension of production.

Our third-party manufacturers or suppliers may use potent chemical agents and hazardous materials, and any claims relating to improper handling, storage or disposal of these materials could be time consuming or costly.

Our third-party manufacturers or suppliers may use hazardous materials, including chemicals and biological agents and compounds that could be dangerous to human health and the safety of the environment. The operations of our third-party manufacturers and suppliers also produce hazardous waste products. Various laws and regulations govern the use, generation, manufacture, storage, handling and disposal of these materials and wastes. Compliance with applicable environmental laws and regulations may be expensive, and current or future environmental laws and regulations may impair our product development efforts. In addition, we cannot eliminate the risk of accidental injury or contamination from these materials or wastes and we may be sued for any injury or contamination that results from our use or the use by third parties of these materials. In the event of contamination or injury, we could be held liable for damages or be penalized with fines in an amount exceeding our resources, and our clinical trials or regulatory approvals could be suspended.

In addition, we may incur substantial costs in order to comply with current or future environmental, health and safety laws and regulations, which have tended to become more stringent over time. These current or future laws and regulations may impair our research, development or production efforts. Failure to comply with these laws and regulations also may result in substantial fines, penalties or other sanctions or liabilities, which could materially adversely affect our business, financial condition, results of operations and prospects.

Our activities rely heavily on sensitive and personal materials and information, an area which is highly regulated by privacy laws. Our failure to comply with such laws or to adequately secure the information we hold could result in significant liability or reputational harm and, in turn, a material adverse effect on our client base, member base and revenue. Further, if we are unable to generate or maintain access to essential patient samples or data for our research and development and manufacturing activities for our programs, our business could be materially adversely affected.

As a result of our clinical development, we will have access to very sensitive data regarding the patients enrolled in our clinical trials, and our current and future product candidates will rely on the use of patient and

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donor data and material. This data will contain information that is personal in nature, and the maintenance of this data is subject to certain privacy-related laws, which impose administrative burdens, substantial costs and litigation risks upon us, such as the rules promulgated by the U.S. Department of Health and Human Services under the U.S. Health Insurance Portability and Accountability Act, or HIPAA, and U.S. state privacy laws. These rules inter alia require that written authorizations from patients are obtained and that policies, procedures and reasonable and appropriate security measures are implemented that protect individually identifiable health and other information we receive and to ensure that such information is used only as authorized by the patient. If the patient fails to execute an authorization or the authorization fails to contain all required provisions, then we will not be allowed access to the patient’s information and our research efforts can be substantially delayed. Also, any violations of these rules by us could subject us to civil and criminal penalties and adverse publicity and could harm our ability to initiate and complete clinical trials.

In addition, there are significant international laws that protect data privacy which we must adhere to. For example, we are subject to the EU General Data Protection Regulation, or the GDPR (as implemented by countries in the EEA), which applies extra-territorially and imposes onerous requirements on controllers (e.g., sponsors) and processors (e.g., CROs, laboratories) of personal data, including, for example: (i) accountability and transparency requirements, and enhanced requirements for obtaining valid consent; (ii) obligations to consider data protection as any new products or services are developed and to limit the amount of personal data processed; (iii) obligations to comply with data protection rights of data subjects; and (iv) reporting of personal data breaches to the supervisory authority without undue delay (and no later than 72 hours). The GDPR also prohibits the international transfer of personal data from the EEA to countries outside of the EEA unless made to a country deemed to have adequate data privacy laws by the European Commission or where a data transfer mechanism has been put in place. Until recently, one such data transfer mechanism was the EU-US Privacy Shield. However, in July 2020 the Court of Justice of the European Union, or the CJEU, declared the Privacy Shield to be invalid. The CJEU upheld the validity of the standard contractual clauses, or SCCs, as a legal mechanism to transfer personal data but companies relying on SCCs will—subject to additional guidance from regulators in the EEA– need to evaluate and implement supplementary measures that provide privacy protections additional to those provided under SCCs. In turn, the findings of the CJEU will have significant implications for cross-border data flows. Further, the GDPR provides that countries in the EEA may establish their own laws and regulations further restricting the processing of certain personal data, including genetic data, biometric data, and health data.

We have relatively limited experience with the relevant privacy and security policies, practices and regulations, and cannot assure that our policies and practices will be sufficient to protect us from liability or adverse publicity relating to the privacy and security of personal data. Privacy laws, rules and regulations also evolve frequently and their scope may continually change, through new legislation, amendments to existing legislation and changes in enforcement, and may be inconsistent from one jurisdiction to another. The interpretation and application of consumer, health-related and data protection laws, especially with respect to genetic samples and data, in the United States, the European Union and elsewhere, are often uncertain, contradictory and in flux. As a result, implementation standards and enforcement practices are likely to remain uncertain for the foreseeable future, and we cannot determine the impact such future laws, regulations and standards may have on our business. We cannot provide assurance that current or future legislation will not prevent us from generating or maintaining personal data or that patients will consent to the use of their personal data (as necessary); either of these circumstances may prevent us from undertaking or publishing essential research and development, manufacturing and commercialization, which could have a material adverse effect on our business, results of operations, financial condition and prospects.

Complying with these various laws and regulations could cause us to incur substantial costs or require us to change our business practices, systems and compliance procedures in a manner adverse to our business. For example, failure to comply with the GDPR requirements could result in regulatory investigations, enforcement notices requiring us to stop or change the way we use personal data and/or fines of up to 20 million Euros or up to 4% of the total worldwide annual turnover of the preceding financial year, whichever is higher, as well as

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compensation claims for financial or non-financial loss by affected individuals, negative publicity, reputational harm and a potential loss of business and goodwill.

These laws, rules and regulations evolve frequently and their scope may continually change, through new legislation, amendments to existing legislation and changes in enforcement, and may be inconsistent from one jurisdiction to another. The interpretation and application of consumer, health-related and data protection laws, especially with respect to genetic samples and data, in the United States, the European Union (EU) and elsewhere, are often uncertain, contradictory and in flux. As a result, implementation standards and enforcement practices are likely to remain uncertain for the foreseeable future, and we cannot determine the impact such future laws, regulations and standards may have on our business. Our internal computer systems, or those used by our clinical investigators, contractors or consultants, may fail or suffer security breaches.

We are a party to certain agreements that contain liability or indemnification provisions under which we may claim damages from our counterparties and under which our counterparties may claim damages from us, including damages caused by product defects.

We are a party to certain agreements, including clinical trial agreements and licensing agreements that contain liability or indemnification provisions under which we or the counterparty may claim damages. In the event we need to claim damages from a counterparty, we may not receive payments covering our damages in full, either because the applicable provision is unenforceable for any reason or because the counterparty is unable to pay (due to insolvency or otherwise). Although in many cases we try to limit our liability, such limitations may not be enforceable in certain jurisdictions or effective in the event that we need to pay damages and we nevertheless could become liable to make substantial payments. If we must make substantial liability payments under an agreement, this could have a material adverse effect on our business, results of operations, financial condition and prospects.

Risks Related to the Commercialization of Our Product Candidates

If we are unable to commercialize our product candidates PHVS416 and PHVS719 or any other product candidates that we may pursue, or experience significant delays in doing so, our business, financial condition, results of operations and prospects would be materially adversely affected.

We do not expect to generate product revenues in the foreseeable future. If our product candidates PHVS416 and PHVS719 or any other program that we may pursue fails, we will have to develop, acquire or license new programs. Our product candidates, as well as any other programs we may pursue, could be unsuccessful if they:

| • |  | do not demonstrate acceptable safety or efficacy in preclinical studies or clinical trials or otherwise do not meet applicable regulatory standards for approval;

| • |  | generate unacceptable adverse side effects;

| • |  | do not offer therapeutic or other improvements over existing or future products used to treat the same conditions;

| • |  | are not accepted in the medical community or by insurers, either public or private; or

| • |  | are not capable of being produced and delivered to patients in commercial quantities at acceptable costs.

The results of the research and trials to date cannot provide assurance that acceptable efficacy or safety will be shown upon completion of ongoing or planned clinical trials. Also, the results obtained in our PHA-0221121-C001 and PHA-022121-C002 clinical trials may not be comparable to results that may be produced during the further development of our PHA121-containing product candidates. Many products that show promise in proof-of-concept, Phase 1 and/or Phase 2 trials fail in later clinical trials or in a commercial setting. If we are unable to make our product candidates commercially available, or we experience significant delays in doing so, our business, financial condition, results of operations and prospects would be materially adversely affected.

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The market opportunities for our product candidates may be smaller than currently anticipated, lowering our potential revenue.

The market opportunities for our product candidates may be smaller than currently anticipated, lowering our potential revenue. We make projections of both the number of people who have HAE, as well as the number of individuals within our target patient population who have the desire to switch to an oral therapy and the potential to benefit from treatment with our product candidates. These projections are derived from scientific literature and patient foundations but are highly contingent on a number of variables that are difficult to predict and may prove to be too high, resulting in a smaller population of patients who are interested in, and could benefit from, our product candidates than we currently anticipate which would result in lower potential revenue. Moreover, if we are successful in developing both PHVS416 and PHVS719, we cannot accurately predict the proportion of patients choosing prophylactic or on-demand only treatment regimens.

Use of our product candidates could be associated with side effects or adverse events.

As with all pharmaceutical products, use of our product candidates could be associated with side effects or adverse events, which can vary in severity and frequency. Side effects or adverse events associated with the use of our product candidates may be observed at any time, including in clinical trials or once a product is commercialized, and any such side effects or adverse events may negatively affect our ability to obtain regulatory approval or market our product candidates. Side effects or adverse events associated with the use of our product candidates could result in a label change, require us to perform additional studies or halt development or sale of these product candidates or expose us to product liability lawsuits, which will harm our business. We may be required by regulatory agencies to conduct additional preclinical or clinical trials regarding the safety of our product candidates, which we have not planned or anticipated. We cannot provide any assurance that we will resolve any issues related to any product-related side effects or adverse events to the satisfaction of the FDA or any regulatory agency in a timely manner or ever, which could harm our business, prospects and financial condition.

If we are successful in commercializing our product candidates, the FDA and other comparable foreign regulatory authorities require that we analyze and report certain information about adverse events that our products may have caused or contributed to. The FDA and other foreign regulatory authorities impose strict requirements with respect to the analysis of such events and the manner and timing of our reporting the information to the regulatory authorities. We may fail to comply with the requirements for assessing and reporting adverse events and if we fail to comply with these obligations, the FDA or other comparable foreign regulatory authorities could take action including the issuance of warning letters or other regulatory correspondence, criminal prosecution, the imposition of civil sanctions, seizure of our products, or delay in approval or clearance of future products.

Even if any of our product candidates receives marketing approval, we may fail to achieve the degree of market acceptance by physicians, patients, third-party payors and others in the medical community necessary for commercial success.

Our product candidates may not be commercially successful. Even if any of our product candidates receive regulatory approval, they may not gain sufficient market acceptance among physicians, patients, healthcare payors or others in the medical community. The commercial success of any of our current or future product candidates will depend significantly on the broad adoption and use of the resulting product by physicians and patients for approved indications. The degree of market acceptance of any of our potential products as may receive marketing authorization will depend on a variety of factors, many of which are outside our control, including:

| • |  | demonstration of clinical efficacy and safety compared to other more-established products;

| • |  | the limitation of our targeted patient population and other limitations or warnings contained in any approved labeling;

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| • |  | acceptance of a new drug for the relevant indication by healthcare providers and their patients;

| • |  | the pricing and cost-effectiveness of our products, as well as the cost of treatment with our products in relation to alternative treatments and therapies;

| • |  | our ability to obtain and maintain sufficient third-party coverage and adequate reimbursement from government healthcare programs, private health insurers and other third-party payors;

| • |  | the willingness of patients to pay all, or a portion of, out-of-pocket costs associated with our products in the absence of sufficient third-party coverage and adequate reimbursement;

| • |  | any restrictions on the use of our products, and the prevalence and severity of any adverse effects;

| • |  | the timing of market introduction of our products as well as competitive drugs;

| • |  | the effectiveness of our or any of our potential future collaborators’ sales and commercialization strategies; and

| • |  | unfavorable publicity relating to the product.

If any products that we may develop fail to achieve market acceptance, we may not be able to generate sufficient revenues. We may make substantial investments in clinical development, manufacturing, supply chain and commercialization without any assurance that we will be able to attain significant market share at a price that would enable us to recover our investments. If we are unable to do so, our business, financial condition, results of operations and prospects would be materially adversely affected.

We face substantial competition, which may result in others discovering, developing or commercializing competing products before or more successfully than we do.

The development and commercialization of new drug products is highly competitive. We face competition with respect to our current product candidates, and will face competition with respect to any product candidates that we may seek to develop or commercialize in the future, from major pharmaceutical companies, specialty pharmaceutical companies and biotechnology companies worldwide. As discussed under “Business—Competition,” there are several licensed therapies for HAE and we are aware of a number of HAE therapies in clinical development. Potential competitors also include academic institutions, government agencies and other public and private research organizations that conduct research, seek patent protection and establish collaborative arrangements for research, development, manufacturing and commercialization.

Our commercial opportunity could be reduced or eliminated if our competitors develop and commercialize products that are safer, more effective, have fewer or less severe side effects, are more convenient or are less expensive than any products that we may develop. In addition, our ability to compete may be affected in many cases by insurers or other third-party payors seeking to encourage the use of generic products. Generic products are expected to become available over the coming years, potentially creating pricing pressure. If our product candidates achieve marketing approval, we expect that they will be priced at a significant premium over competitive generic products. This may make it difficult for us to achieve our business strategy of using our product candidates in combination with existing therapies or replacing existing therapies with our product candidates. Competition may further increase as a result of advances in the commercial applicability of technologies and greater availability of capital for investment in these industries.

Many of the companies against which we are competing or we may compete in the future have significantly greater financial resources and expertise in research and development, manufacturing, preclinical testing, conducting clinical trials, obtaining regulatory approvals and marketing approved products than we do. Mergers and acquisitions in the pharmaceutical and biotechnology industries may result in even more resources being concentrated among a smaller number of our competitors. Smaller and other early stage companies may also prove to be significant competitors, particularly through collaborative arrangements with large and established

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companies. These third parties compete with us in recruiting and retaining qualified scientific and management personnel, establishing clinical trial sites and patient registration for clinical trials, as well as in acquiring technologies complementary to, or necessary for, our programs.

We may encounter difficulties in managing our growth and expanding our operations successfully.

If we advance our product candidates through clinical trials and regulatory approvals, we will need to expand our development, manufacturing, regulatory, commercialization and supply chain capabilities or contract with third parties to provide these capabilities for us. Our ability to realize our commercialization strategy and manage any growth will require us to continue to recruit and train additional qualified personnel and make appropriate changes to our operational, financial and management controls. We may experience a delay in becoming aware of certain issues or information material to management decisions. The expansion of our operations, including potential expansion into global markets outside of the European Union and the United States, may lead to significant costs, new challenges and risks and may divert the attention of our management and our business development resources. Any inability to manage anticipated growth and expanding operations, including as a result of failing to realize our commercialization strategy for our product candidates PHVS416 and PHVS719, could adversely affect our business, financial condition, results of operations or prospects.

Governments and/or pricing authorities, especially in the European Union, often impose strict price and access controls, which may adversely affect our future profitability.

In some markets, especially in the European Union, prescription drug pricing is subject to governmental/pricing authority control which can vary by country and degree. In these countries, pricing negotiations with governmental/pricing authorities can take considerable time after the receipt of marketing approval for a product. If reimbursement of any future products is unavailable or limited in scope or amount, or if pricing is set at unsatisfactory levels or the pricing negotiation is considerably delayed, we may be unable to achieve or sustain profitability.

Drug pricing and other healthcare costs continue to be subject to intense political and societal pressures, which we anticipate will continue and escalate on a global basis. These pressures may result in harm to our business and reputation, cause the market price of our ordinary shares to decline or experience periods of volatility and adversely affect results of operations and our ability to raise funds.

The insurance coverage and reimbursement status of newly approved products is uncertain. Failure to obtain or maintain adequate coverage and reimbursement for new or current products could limit our ability to market those products and decrease our ability to generate revenue.

The availability and extent of reimbursement by governmental and private payors is essential for most patients to be able to afford expensive treatments. Sales of our product candidates will depend substantially, both domestically and abroad, on the extent to which the costs of our product candidates will be paid by health maintenance, managed care, pharmacy benefit and similar healthcare management organizations, or reimbursed by government health administration authorities, private health coverage insurers and other third-party payors. If reimbursement is not available, or is available only to limited levels, we may not be able to successfully commercialize our product candidates. Even if coverage is provided, the approved reimbursement amount may not be high enough to allow us to establish or maintain pricing sufficient to realize a sufficient return on our investment.

There is significant uncertainty related to the insurance coverage and reimbursement of newly approved products. In the United States, the principal decisions about reimbursement for new medicines are typically made by the Centers for Medicare & Medicaid Services, or CMS, an agency within the U.S. Department of Health and Human Services. CMS decides whether and to what extent a new medicine will be covered and reimbursed under

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Medicare. Private payors often rely upon Medicare coverage policy and payment limitations in setting their own reimbursement rates. It is difficult to predict what CMS will decide with respect to reimbursement for fundamentally novel products such as ours, as there is no body of established practices and precedents for these new products.

Outside the United States, international operations are generally subject to extensive governmental price controls and other market regulations, and we believe the increasing emphasis on cost-containment initiatives in Europe, Canada, and other countries has and will continue to put pressure on the pricing and usage of our product candidates. In many countries, the prices of medical products are subject to varying price control mechanisms as part of national health systems. In general, the prices of medicines under such systems are substantially lower than in the United States. Other countries allow companies to fix their own prices for medicines, but monitor and control company profits. Additional foreign price controls or other changes in pricing regulation could restrict the amount that we are able to charge for our product candidates. Accordingly, in markets outside the United States, the reimbursement for our products may be reduced compared with the United States and may be insufficient to generate commercially reasonable revenues and profits.

Moreover, increasing efforts by governmental and third-party payors, in the United States and abroad, to cap or reduce healthcare costs may cause such organizations to limit both coverage and level of reimbursement for new products approved and, as a result, they may not cover or provide adequate payment for our product candidates. We expect to experience pricing pressures in connection with the sale of any of our product candidates, due to the trend toward managed healthcare, the increasing influence of health maintenance organizations and additional legislative changes. The downward pressure on healthcare costs in general, particularly prescription drugs and surgical procedures and other treatments, has become very intense. As a result, increasingly high barriers are being erected to the entry of new products into the healthcare market.

In addition, many private payors contract with commercial vendors who sell software that provide guidelines that attempt to limit utilization of, and therefore reimbursement for, certain products deemed to provide limited benefit to existing alternatives. Such organizations may set guidelines that limit reimbursement or utilization of our products.

We may become exposed to costly and damaging liability claims, either when testing our product candidates in the clinic or after commercialization; and our product liability insurance may not cover all damages from such claims.

We face an inherent risk of product liability as a result of the clinical testing of our product candidates and will face an even greater risk if we commercialize any products. For example, we may be sued if any product we develop allegedly causes injury or is found to be otherwise unsuitable during product testing, manufacturing, marketing or sale. Any such product liability claims may include allegations of defects in manufacturing, defects in design, a failure to warn of dangers inherent in the product, negligence, strict liability and a breach of warranties. Physicians and patients may not comply with any warnings that identify known potential adverse effects and patients who should not use our products. If we cannot successfully defend ourselves against product liability claims, we may incur substantial liabilities or be required to stop development or, if approved, limit commercialization of our product candidates. Even successful defenses would require significant financial and management resources. Regardless of the merits or eventual outcome, liability claims may result in:

| • |  | delay or termination of clinical trials;

| • |  | injury to our reputation and negative publicity;

| • |  | withdrawal of clinical trial participants, patients or clinical investigators;

| • |  | initiation of investigations by regulators or ethics committees;

| • |  | costs to defend the related litigation;

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| • |  | a diversion of management’s time and our resources;

| • |  | substantial monetary awards to trial participants or patients;

| • |  | decreased demand for our product candidates;

| • |  | product recalls or withdrawals, or labeling, marketing or promotional restrictions;

| • |  | loss of revenues from product sales;

| • |  | the inability to commercialize any of our product candidates, if approved; and

| • |  | a decline in the price of our ordinary shares.

Any product liability insurance coverage we obtain may not fully cover potential liabilities that we may incur. Our insurance policies have various exclusions, and we may be subject to a product liability claim for which we have no coverage. The cost of any product liability litigation or other proceeding, even if resolved in our favor, could be substantial. We will have to pay any amounts awarded by a court or negotiated in a settlement that exceed our coverage limitations or that are not covered by our insurance, and we may not have, or be able to obtain, sufficient capital to pay such amounts.

We will also need to increase our insurance coverage if we commercialize any product that receives marketing approval. Insurance coverage is becoming increasingly expensive. If we are unable to maintain sufficient insurance coverage at an acceptable cost or to otherwise protect against potential product liability claims, it could prevent or inhibit the development and commercial production and sale of our product candidates, which could harm our business, financial condition, results of operations and prospects.

If we are unable to establish commercial capabilities or enter into agreements with third parties to market, sell and distribute our product candidates, we may be unable to generate any revenues if and when our product candidates are approved.

If any of our product candidates receive marketing approval, we intend to market, sell and distribute them using our own commercial infrastructure. However, we have no experience in commercialization, selling and distributing pharmaceutical products or establishing a commercial organization. We may enter into collaborations with other entities to utilize their mature sales, marketing and distribution capabilities, but we may be unable to enter into commercialization agreements on favorable terms, if at all. If our future collaborative partners do not commit sufficient resources to commercialize our product candidates, if approved, or if we are unable to develop the necessary commercialization capabilities on our own, we will be unable to generate sufficient product revenues to sustain our business. Further, we may not have sufficient control or oversight over our future collaborative partners to ensure they sell and market our product candidates in compliance with all applicable law. In building our commercial infrastructure or commercializing our product candidates, if approved, we will be competing with other well-funded companies that currently have or are building extensive commercial operations. Without an internal team or the support of a third-party to perform commercial functions, we may be unable to successfully commercialize our product candidates, if approved, and/or compete successfully against these companies.

Risks Related to Our Reliance on Third Parties and Key Personnel

If third parties on which we depend to conduct our clinical trials do not perform as contractually required, fail to satisfy regulatory or legal requirements or miss expected deadlines, our development program could be delayed with materially adverse effects on our business, financial condition, results of operations and prospects.

We rely on CROs, independent clinical investigators, clinical data management organizations, consultants and other third-party firms to design, conduct, supervise and monitor clinical trials. We and these third parties are

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required to comply with extensive regulations, including good clinical practices, or GCP, which are enforced by the competent authorities of the member states of the European Economic Area, or EEA, the FDA and other comparable regulatory authorities; GCP are intended to ensure that the health, safety and rights of patients are protected in clinical development and clinical trials, and that trial data integrity is assured. In fact, as sponsor of the clinical trials, GCP compliance remains our responsibility. Regulatory authorities ensure compliance with these requirements through periodic inspections of trial sponsors, clinical investigators and trial sites. Our reliance on third parties that we do not control does not relieve us of these responsibilities and requirements. If we or any of these third parties fail to comply with applicable requirements, clinical trials may be put on “clinical hold,” the clinical data generated in our clinical trials may be deemed unreliable and the FDA or comparable foreign regulatory authorities may require us to perform additional clinical trials before approving our marketing applications. We cannot assure that upon inspection by a given regulatory authority, such regulatory authority will determine that any of our clinical trials comply with such requirements. In addition, our clinical trials must be conducted with products that are cGMP produced. Failure to comply with these regulations may result in a clinical hold or require us to repeat preclinical and clinical trials, which would delay the regulatory approval process.

Third-party staff are not our employees and, except for remedies available to us under our agreements with such third parties, we cannot control whether or not they devote sufficient time and resources to our ongoing clinical and preclinical programs and meet their quality and other requirements. If these third parties do not successfully carry out their contractual duties or obligations or meet expected deadlines or if the quality or accuracy of the product or clinical data they obtain is compromised due to the failure to adhere to our clinical protocols, regulatory requirements or for other reasons, our clinical trials may be put on hold, extended, delayed or terminated and we may not be able to obtain regulatory approval for or successfully commercialize our product candidates. As a result, our operations and the commercial prospects for our product candidates in development would be harmed, our costs could increase and our ability to generate revenues could be delayed.

Because we have relied on third parties, our internal capacity to perform these functions is limited. Outsourcing these functions involves the risk that third parties may not perform to our standards, may not produce results in a timely manner or may fail to perform at all. In addition, the use of third-party service providers requires us to disclose our proprietary information to these parties, which could increase the risk that this information will be misappropriated. We currently have a small number of employees, which limits the internal resources we have available to identify and monitor our third-party providers. To the extent we are unable to identify and successfully manage the performance of third-party service providers in the future, our business may be adversely affected. Though we carefully manage the relationships with third parties, there can be no assurance that we will not encounter similar challenges or delays in the future or that these delays or challenges will not have a material adverse impact on our business, financial condition, results of operation and prospects.

If we cannot contract with acceptable third parties on commercially reasonable terms, or at all, or if these third parties do not carry out their contractual duties, satisfy legal and regulatory requirements for the conduct of preclinical studies or clinical trials or meet expected deadlines, our clinical development programs could be delayed and otherwise adversely affected. Any such event could have a material adverse effect on our business, financial condition, results of operations and prospects.

We are dependent on the services of our management and other clinical and scientific personnel, and if we are not able to retain these individuals or recruit additional management or clinical and scientific personnel, our business will suffer.

Our success depends in part on our continued ability to attract, retain and motivate highly qualified management, clinical and scientific personnel. We are highly dependent upon our senior management team as well as our senior scientists. The loss of services of any of these individuals could delay or prevent the successful development of our product candidates, initiation or completion of our planned clinical trials or the commercialization of our product candidates. Our industry has experienced a high rate of turnover of

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management, clinical and scientific personnel in recent years and despite our efforts to retain valuable employees, members of our management, scientific and development teams may terminate their employment with us. In addition, as we expand our operations, we may not be successful in maintaining our unique company culture and continuing to attract or retain qualified management and scientific and clinical personnel in the future due to the intense competition for qualified personnel among pharmaceutical, biotechnology and other businesses. Replacing executive officers and key employees may be difficult and may take an extended period of time because of the limited number of individuals in our industry with the breadth of skills and experience required to successfully develop, gain regulatory approval of and commercialize products. Competition to hire from this limited pool is intense, and we may be unable to hire, train, retain or motivate these key personnel on acceptable terms given the competition among numerous pharmaceutical and biotechnology companies for similar personnel. We also experience competition for the hiring of scientific and clinical personnel from universities and research institutions. If we do not have sufficient numbers of skilled employees to support our research, development, manufacturing, regulatory compliance or management functions, or if our employees lack the skills necessary for the development of our operations, we may need to retain consultants and advisers, if available on terms acceptable to us, if at all, who may have conflicts of interest or other commitments, such as consulting or advisory contracts with other organizations that may affect their ability to contribute to us. In addition, if we are not able to attract, integrate, retain and motivate sufficient scientific, technical and managerial personnel, we will be unable to advance our clinical programs or expand our business, which may have a material adverse effect on our business, financial condition, results of operations and prospects.

We are heavily dependent on third parties to perform critical activities related to the research, development and manufacturing of our product candidates. If these third parties fail or are unable to perform, our development programs and candidate products could be materially and adversely affected and our business and prospects will suffer.

We are heavily dependent on third parties to conduct certain key activities relating to the research, development and manufacturing of our product candidates. For example, we rely on third-party firms to conduct development, studies, and trials with respect to our candidate products and to manufacture and supply the material used in our studies and trials.

Our reliance on third parties may pose the following risks to us:

| • |  | third parties have significant discretion in determining the efforts and resources that they will apply to our development programs and product candidates;

| • |  | third parties could independently develop, supply, manufacture, commercialize or collaborate with additional third parties, products that compete directly or indirectly with our product candidates;

| • |  | third parties may not properly prosecute, maintain, enforce or defend our intellectual property rights or may use our proprietary information in a way that gives rise to actual or threatened litigation that could jeopardize or invalidate our intellectual property or proprietary information or expose us to potential litigation, or other intellectual property proceedings;

| • |  | disputes may arise with respect to ownership of any intellectual property developed pursuant to our collaborations and activities with third parties;

| • |  | disputes may arise between us and our third party collaborators and service provider that cause the delay or termination of the development, manufacturing, supply or commercialization of our product candidate, or that result in costly litigation or arbitration that diverts management’s attention and resources; and

| • |  | if a current or future third-party collaborator or service provider of ours were to be involved in a business combination, the continued pursuit and emphasis on our product development or commercialization program could be delayed, diminished or terminated.

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As a result, if any third-parties upon which we are dependent fail or are unable to perform, our development programs and candidate products could be materially adversely affected.

We may be unable to enter into or maintain strategic alliances or collaborations which could affect our ability to commercialize our product candidates, if approved.

We may seek strategic alliances or collaborations to further the clinical development and commercialization of certain of our product candidates as they would likely require expensive and time-consuming clinical trials. In seeking strategic partners, we face significant competition from other companies as well as public and private research institutions. There can be no assurance that we will be able to enter into or maintain strategic alliances on terms favorable to us, or at all. Potential partners may require royalty or milestone payments, rights to current or after-developed intellectual property, exclusivity rights, limitations on liabilities, indemnities or other provisions that are adverse to us. Potential partners may fail to diligently fund, develop or commercialize our product candidates. Any of the foregoing may have a material adverse effect on our business, financial condition, results of operations and prospects.

Risks Related to Our Intellectual Property

If we fail to make required payments to AnalytiCon pursuant to the agreements pursuant to which we acquired certain of our core intellectual property or are otherwise in material breach of such agreements (and fail to cure such breaches within a specified time period), AnalytiCon may exercise remedies pursuant to such agreements that would materially and adversely affect our business and results of operations.

Certain intellectual property that is core to our business has been invented by AnalytiCon and contractually assigned to us by AnalytiCon, with whom we continue to collaborate for the development of our product candidates. We owe AnalytiCon milestone payments contingent on our achievement of certain clinical development and regulatory events, as well as royalties and milestone payments based on sales of such product candidates. If we fail to make such payments to AnalytiCon or are otherwise in material breach of certain agreements that we entered into with AnalytiCon (and fail to cure such breaches within a specified time period), and AnalytiCon exercises contractual remedies available to it under such agreements, then we may be required to grant AnalytiCon an exclusive license to the intellectual property that it assigned to us for use in all applications, including HAE. In addition, we could be prevented from competing with AnalytiCon until five years after the commercial launch of any product candidates containing a compound from the OB2RA Class. If we failed to make such payments and AnalytiCon were to exercise such remedies, we would not be able to continue our current development program or commercialize our product candidates and our business and results of operations would be materially and adversely affected. For a description of our arrangement with AnalytiCon, please see “Business—License Agreement.”

If we are unable to obtain and maintain patent or trade secret protection for any products or product candidates we develop and for our technology, or if the scope of the patent protection obtained is not sufficiently broad, our competitors could develop and commercialize products and technology similar or identical to ours, and our ability to successfully commercialize any product candidates or technology we may develop may be adversely affected.

Our commercial success depends in significant part on obtaining and maintaining current and future patent protection, trade secrets and confidential know-how for our technologies, product candidates, the methods used to manufacture those product candidates and the methods for treating patients using those product candidates. We may not be able to file, prosecute, maintain, enforce, or license all necessary or desirable patents and patent applications at a reasonable cost or in a timely manner. Our failure to obtain, maintain or extend patent protection or to protect trade secrets or confidential know-how could materially adversely affect our ability to compete.

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Obtaining and enforcing patents in the pharmaceutical industry involves both technological and legal complexity and is therefore costly, time consuming and subject to numerous risks and uncertainties. These risks and uncertainties include, but are not limited, to the following:

| • |  | the United States Patent and Trademark Office, or USPTO, and various foreign governmental patent agencies require compliance with a number of procedural, documentary, fee payment and other provisions during the patent process, the noncompliance with which can result in abandonment or lapse of a patent or patent application, and partial or complete loss of patent rights in the relevant jurisdiction;

| • |  | patent applications may not result in any patents being issued;

| • |  | patents may be challenged, invalidated, modified, revoked, circumvented, found to be unenforceable or otherwise may not provide any competitive advantage;

| • |  | our competitors, many of whom have substantially greater resources than we do and many of whom have made significant investments in competing technologies, may seek or may have already obtained patents that will limit, interfere with or block our ability to make, use and sell our product candidates;

| • |  | there may be significant pressure on the U.S. government and international governmental bodies to limit the scope of patent protection both inside and outside the United States for disease treatments that prove successful, as a matter of public policy regarding worldwide health concerns; and

| • |  | countries other than the United States may have patent laws less favorable to patentees than those upheld by U.S. courts, allowing foreign competitors a better opportunity to create, develop and market competing products.

If we or any third parties that develop or create any intellectual property for us are unable to secure necessary assignments or rights, then our rights to such intellectual property, and ultimately our ability to protect our candidate products, may be adversely affected.

It is also possible that we fail to identify patentable aspects of our research and development output in time to obtain patent protection. In addition, we may not be aware of all third-party intellectual property rights potentially relating to our product candidates and technology. We cannot guarantee that any of our or our licensors’ patent searches or analyses, including but not limited to the identification of relevant patents, analysis of the scope of relevant patent claims or determination of the expiration of relevant patents, are complete or thorough, nor can we be certain that we have identified each and every third-party patent and pending application in the United States and elsewhere that is relevant to or necessary for the development and commercialization of our product candidates in any jurisdiction. For example, publications of discoveries in the scientific literature often lag behind the actual discoveries, and patent applications in the United States and other jurisdictions are typically not published until 18 months after filing, or in some cases not at all. Therefore, we cannot be certain that we were the first to make the inventions claimed in any licensed patents or pending patent applications (or claimed in any patents that we may own in the future, if any), or that we were the first to file for patent protection of such inventions.

The duration and scope of any patents we are issued in the future (if any) or the patent rights of our licensors or collaborators may not be sufficient to effectively protect our product candidates and business.

The patent position of biopharmaceutical companies generally is highly uncertain, involves complex legal and factual questions, and has been the subject of much litigation in recent years. As a result, the issuance, scope, validity, enforceability and commercial value of our patent rights are highly uncertain. Even if our current or future patent applications are issued as patents, they may not be issued with the scope of claims sought by us, or the scope of claims we or our licensors are seeking may not be sufficiently broad to protect our product candidates or provide us with any competitive advantage. Any patents that we may own in the future (if any) may be challenged or circumvented by third parties or may be narrowed or invalidated as a result of challenges by

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third parties. Consequently, we do not know whether our product candidates will be protectable by valid and enforceable patents.

Moreover, the coverage claimed in a patent application can be significantly reduced before the patent is issued, and its scope can be reinterpreted after issuance. Changes in or different interpretations of patent laws in the United States, Europe, and other jurisdictions may also permit others to use our discoveries or to develop and commercialize our technology and products without providing any compensation to us, or may limit the number of patents or claims we can obtain. The laws of some countries do not protect intellectual property rights to the same extent as U.S. and European laws and those countries may lack adequate rules and procedures for defending our intellectual property rights.

Our competitors and other third parties would be able to offer and sell products so long as they do not infringe any valid and enforceable patents or other proprietary rights that we or others, including our licensors, may have. The specific content of patents and patent applications that are necessary to support and interpret the scope of patent claims is highly uncertain due to the complex nature of the relevant legal, technical and factual issues. Such risks will increase if we or our licensors are not able to obtain additional patents protecting aspects of our product candidates and technology, such as product improvements, formulations, methods of production or novel uses of the relevant product candidates.

In addition, patents have a limited lifespan. For example, if renewal fees are paid timely, a European patent expires 20 years after its effective filing date. Similarly, if all maintenance fees are timely paid, a patent in the United States generally expires 20 years after its effective filing date. Depending upon the timing, duration and specifics of any FDA marketing approval of any product candidates we may develop in the United States, any patents we are issued in the future (if any) may qualify for a limited patent term extension if certain criteria are met (e.g., in case of significant delays during patent prosecution or during FDA approval for bringing a drug covered by a patent to market) under the Drug Price Competition and Patent Term Restoration Act of 1984, referred to as the Hatch-Waxman Amendments. Specifically, the Hatch Waxman Amendments permit a patent extension term of up to five years as compensation for patent term lost during the FDA regulatory review process. A patent term extension cannot extend the remaining term of a patent beyond a total of 14 years from the date of product approval, only one patent may be extended and only those claims covering the approved drug, a method for using it, or a method for manufacturing it may be extended. However, in such an event we may not be granted an extension because of, for example, failing to exercise due diligence during the testing phase or regulatory review process, failing to apply within applicable deadlines, failing to apply prior to expiration of relevant patents, or otherwise failing to satisfy applicable requirements. Moreover, the applicable time period or the scope of patent protection afforded could be less than we request. In the European Union, an extension of the duration of protection for a pharmaceutical product on the basis of a supplementary protection certificate could be applied for after a valid market authorization is obtained and if the product is specifically covered by a basic patent in force. As a result, an additional term of protection could be obtained for the relevant product on top of the maximum lifespan of the patent. The term of the allowed extension varies, and in principle is at most five and a half years. Consequently, despite these general possibilities for obtaining a certain extension of the duration of protection based on a patent if certain criteria are met, the protection provided by a patent is limited in time.

Furthermore, given the amount of time required for the development, testing, and regulatory review of new product candidates, patents protecting such candidates might expire before or shortly after such candidates are commercialized. Even if additional patents covering our product candidates are obtained, the expiration of a patent may leave us more vulnerable to competition from biosimilar or generic alternatives, and our business, financial condition, results of operations and prospects could be materially harmed. As a result, our intellectual property may not provide us with sufficient rights to exclude others from commercializing products similar or identical to ours. Any of the foregoing could have a material adverse effect on our competitive position, business, financial conditions, results of operations and prospects.

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Patents covering our technology and product candidates that may be issued (if any) could be found invalid or unenforceable if challenged in court or an issuing body.

The issuance of a patent is not conclusive as to its inventorship, scope, validity or enforceability, and any patents we may own in the future (if any) may be challenged in the courts or patent offices in the United States and elsewhere. Such challenges may result in loss of exclusivity or in patent claims being narrowed, invalidated or held unenforceable which could limit our ability to stop others from using or commercializing similar or identical technology and products, or limit the duration of the patent protection of our technology and product candidates.

To the extent that we obtain any patents in the future, our patent protection in respect of our product candidates and technologies may be limited or lost if patents that may be issued to us or patents we use under the terms of exclusive commercial licenses were to be declared invalid, rendered unenforceable or narrowed in scope as a result of any re-examination, post grant review, inter partes review, interference proceedings, derivation proceedings, equivalent proceedings in other jurisdictions or judicial action. If one of our licensing partners or we initiate legal proceedings against a third-party to enforce a patent covering one of our product candidates or technologies, the defendant could counterclaim that the patent covering our product candidate is invalid or unenforceable. Grounds for a validity challenge could be an alleged failure to meet any of several statutory requirements, including lack of novelty, obviousness, lack of patentable subject matter, lack of written description or non-enablement. Grounds for an unenforceability assertion could be an allegation that someone connected with prosecution of the patent withheld information material to patentability from the relevant issuing body, or made a misleading statement, during prosecution. A challenge to patents could result in a ruling adverse to us that could invalidate or render unenforceable such patents or substantially reduce the scope of protection afforded by them. A court may also determine, retrospectively, that despite the issuance of the patent by the relevant issuing body, the corresponding patent application did not meet the statutory requirements. If a competitor or other third parties were to successfully challenge our patents (to the extent any are obtained), and claims in these patents were consequently narrowed, rendered unenforceable or invalidated, our ability to protect the related product candidate or technology from competition could be compromised. Such proceedings could result in the revocation or cancellation of or amendment to such patents in such a way that they no longer cover our product candidates. The outcome following legal assertions of invalidity and unenforceability is unpredictable. With respect to the validity question, for example, we cannot be certain that there is no invalidating prior art, of which the patent examiner and we or our licensing partners were unaware during prosecution. If a defendant were to prevail on a legal assertion of invalidity or unenforceability, we could lose at least part, and perhaps all, of the patent protection on one or more of our product candidates to the extent that any such patents are issued. Such a loss of patent protection could have a material adverse impact on our business.

We may not be able to protect or enforce our intellectual property rights in all jurisdictions.

Filing, prosecuting, and defending patents on product candidates in all countries throughout the world would be prohibitively expensive, and the laws of foreign countries may not protect our rights to the same extent as the laws of the United States or the European Union. Consequently, we may not be able to prevent third parties from practicing our inventions in all countries, or from selling or importing products made using our inventions in and into the United States, the European Union or other jurisdictions. Competitors may use our technologies in jurisdictions where we have not obtained patent protection to develop their own products and may export otherwise infringing products and these products may compete with our product candidates in jurisdictions where we do not have any issued patents.

Many companies have encountered significant problems in protecting and defending intellectual property rights in foreign jurisdictions. Patent laws vary by jurisdiction, and, accordingly, the degree of protection afforded to the same technology, if any, may differ depending on the jurisdiction. The legal systems of certain countries, particularly certain developing countries, do not favor the enforcement of patents and other intellectual property protection, particularly those relating to biopharmaceuticals, which could make it difficult for us to stop

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the infringement of any patents we are issued in the future (if any) or commercialization of competing products in violation of our proprietary rights generally. Proceedings to enforce any patent rights we are issued in the future (if any) in foreign jurisdictions could result in substantial costs and divert our efforts and attention from other aspects of our business, could put such patents at risk of being invalidated or interpreted narrowly and could provoke third parties to assert claims against us. In such an event, we may not prevail in any lawsuits that we initiate, and the damages or other remedies awarded, if any, may not be commercially meaningful. Accordingly, our efforts to enforce our intellectual property and proprietary rights around the world may be inadequate to obtain a significant commercial advantage from the intellectual property that we develop or license. Our inability to protect or enforce our intellectual property rights throughout the world could have a material adverse effect on our business, prospects, financial condition, results of operations and prospects.

In addition, many countries have compulsory licensing laws under which a patent owner may be compelled to grant licenses to third parties and many countries limit the enforceability of patents against government agencies or government contractors. In these countries, the patent owner may have limited remedies, which could materially diminish the value of such patent. If we (to the extent we are issued any patents covering our product candidates) or any of our licensors is forced to grant a license to third parties with respect to any patents relevant to our business, our competitive position may be impaired, and our business, financial condition, results of operations and prospects may be adversely affected.

Changes in patent law could diminish the value of patents in general, thereby impairing our ability to protect our product candidates.

To the extent that we are issued patents covering our product candidates (if any), changes in either patent laws or interpretations of patent laws in the United States, the European Union, Canada or other jurisdictions may diminish the value of our intellectual property or narrow the scope of our patent protection and could increase the uncertainties and costs surrounding the prosecution of patent applications and the enforcement or defense of issued patents (to the extent any such patents are issued).

For example, patent reform legislation in the United States, including the Leahy-Smith America Invents Act, or the America Invents Act, could increase those uncertainties and costs. The America Invents Act was signed into law on September 16, 2011, and many of the substantive changes became effective on March 16, 2013. The America Invents Act reforms United States patent law in part by changing the U.S. patent system from a “first to invent” system to a “first inventor to file” system in which, assuming that other requirements for patentability are met, the first inventor to file a patent application will be entitled to the patent on an invention regardless of whether a third-party was the first to invent the claimed invention. In addition, the America Invents Act expands the definition of prior art and develops a post-grant review system. This legislation changed United States patent law in a way that may weaken our ability to obtain patent protection in the United States for those applications filed after March 16, 2013.

Further, the America Invents Act created new procedures to challenge the validity of issued patents in the United States, including post grant review, inter partes review, and derivation proceedings, which some third parties have been using to cause the cancellation of selected or all claims of issued patents. These adversarial actions at the USPTO review patent claims without the presumption of validity afforded to U.S. patents in lawsuits in U.S. federal courts, and use a lower burden of proof than used in litigation in U.S. federal courts. Therefore, it is generally considered easier for a competitor or third-party to have a U.S. patent invalidated in a USPTO post-grant review or inter partes review proceeding than invalidated in a litigation in a U.S. federal court. If any patents that we are issued in the future (if any) or our licensor’s patents are challenged by a third-party in such a USPTO proceeding, there is no guarantee that we or our licensors or collaborators will be successful in defending the patent, which would result in a loss of the challenged patent right to us.

In addition, the patent positions of companies in the development and commercialization of pharmaceuticals are particularly uncertain. Recent court rulings in cases such as Association for Molecular Pathology v. Myriad

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Genetics, Inc., BRCA1- &BRCA2-Based Hereditary Cancer Test Patent Litigation, Mayo Collaborative Services v. Prometheus Laboratories, Inc., Promega Corp. v. Life Technologies Corp. and Abbvie Deutschland GmbH v. Janssen Biotech, Inc. have narrowed the scope of patent protection available in certain circumstances and weakened the rights of patent owners in certain situations. In addition to increasing uncertainty with regard to our ability to obtain patents in the future, this combination of events has created uncertainty with respect to the value of patents once obtained. Depending on future actions by the U.S. Congress, the U.S. courts, and the USPTO and the relevant law-making bodies in other countries, the laws and regulations governing patents could change in unpredictable ways that would weaken our ability to obtain new patents or to enforce patents that we might obtain in the future. Any changes to patent law in the U.S. or other jurisdictions that impairs our ability to protect our PHA121 and other product candidates that we may pursue could have a material adverse effect on our business, financial condition, results of operations and prospects.

Confidentiality agreements with employees and third parties may not prevent unauthorized disclosure of trade secrets and other proprietary information and may not provide an adequate remedy.

We consider proprietary trade secrets and confidential know-how and unpatented know-how to be important to our business. We rely on trade secrets and confidential know-how to protect our technology, especially where we do not believe that patent protection is appropriate or obtainable. However, trade secrets and confidential know-how are difficult to protect and some courts in the United States, the European Union and elsewhere are less willing or unwilling to protect trade secrets. We seek to protect our proprietary trade secrets and confidential know-how, in part, by entering into confidentiality agreements with our current and former employees, consultants, contractors, outside scientific collaborators and other advisers. However, we cannot guarantee that we have entered into such agreements with each party that may have or has had access to our trade secrets or confidential know-how or that such agreements will fully protect our proprietary trade secrets and confidential know-how. Our current or former employees, consultants, contractors, outside scientific collaborators and other advisers may have access to and unintentionally or willfully disclose our confidential information, including to competitors. Our confidentiality agreements may be breached by such individuals and we may not have adequate remedies for any breach. Enforcing a claim that a third-party obtained illegally and is using trade secrets and confidential know-how illegally is expensive and time consuming and the outcome is unpredictable. Failure to obtain or maintain trade secret and confidential know-how trade protection could adversely affect our competitive business position. Moreover, our competitors and other third parties may independently develop equivalent knowledge, methods and know-how and may even apply for patent protection in respect of the same. If successful in obtaining such patent protection, our competitors could limit how we use our trade secrets and confidential know-how, which may have a material adverse effect on our business, financial condition, results of operations and prospects.

If we or our licensors infringe, misappropriate or otherwise violate intellectual property rights of third parties, we may face increased costs or we may be unable to commercialize our product candidates.

Our commercial success depends upon our ability to develop, manufacture, market, sell and distribute our product candidates and use our proprietary technologies without infringing, misappropriating or otherwise violating the proprietary rights and intellectual property of third parties. The biotechnology and pharmaceutical industries are characterized by extensive and complex litigation regarding patents and other intellectual property rights. There is a risk that third parties may allege that our employees, consultants, independent contractors or the licensors have wrongfully used or disclosed trade secrets and we infringed, are infringing, or will infringe the proprietary rights of third parties because patents and pending applications belonging to third parties exist in the European Union, the United States and elsewhere in the world in the areas in which our research is conducted. Because patent applications take several years to complete, there may be currently pending applications, unknown to us, which may later result in issued patents that cover the production, manufacture, commercialization or use of our product candidates and technology. In addition, the production, manufacture, commercialization or use of our product candidates may infringe existing patents of which we are not aware. Even if we believe such claims of infringement are without merit, a court of competent jurisdiction could hold

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that these third-party patents are valid, enforceable and infringed, which could materially and adversely affect our ability to commercialize our product candidates and technology. In order to successfully challenge the validity of any such U.S. patent in federal court, we would need to overcome a presumption of validity. As this burden is a high one requiring us to present clear and convincing evidence as to the invalidity of any such U.S. patent claim, there is no assurance that a court of competent jurisdiction would invalidate the claims of any such U.S. patent. Even if we are successful in defending against such claims, litigation could be time-consuming and result in substantial costs and be a distraction to management.

If we are found to infringe a third-party’s valid and enforceable intellectual property rights, we could be required to:

| • |  | cease developing, manufacturing, selling or licensing the infringing product candidates or technology;

| • |  | obtain a license from such third-party to continue developing, manufacturing and marketing our product candidates and technologies, which may not be available on commercially reasonable terms or at all and even if we were able to obtain a license, it could be non-exclusive, thereby giving our competitors and other third parties access to the same technologies licensed to us, and it could require us to make substantial licensing and royalty payments or grant a cross license to our patents (to the extent any such patents are issued) to another patent holder;

| • |  | pay substantial damages for past infringement, including treble damages and attorneys’ fees, if we are found to have willfully infringed a patent or other intellectual property right; or

| • |  | be required to redesign the formulation of a product such that it does not infringe, which may not be possible or could require substantial funds and time.

Any of the foregoing could have a material adverse effect on our business, financial condition, results of operations and prospects.

We have received proprietary information and know-how from third parties. In addition, many of our employees were previously employed at other biotechnology or pharmaceutical companies. Although we try to ensure that our employees, consultants, and advisors do not use the proprietary information or know-how of others in their work for us, we may be subject to claims that we or these individuals have used or disclosed intellectual property, including trade secrets or other proprietary information, of any such individual’s current or former employer. We may be subject to ownership disputes in the future arising, for example, from conflicting obligations of consultants or others who are involved in developing our product candidates. We may also be subject to claims that former employees, consultants, advisors or other third parties have an ownership interest in our patents or other intellectual property. Litigation may be necessary to defend against these claims. If we fail in defending any such claims, in addition to paying monetary damages, we may lose valuable intellectual property rights or personnel, which could have a material adverse effect on our business, financial condition, results of operations and prospects, and be a distraction to our management and employees.

Intellectual property litigation or proceedings could cause us to spend substantial resources and distract our personnel from their normal responsibilities.

To the extent that we are issued any patents covering our product candidates, competitors may infringe such patents or the patents of our licensing partners. However, we may not have the resources to reliably detect infringements of intellectual property rights, and even if we detect an infringement we may not be able to trace the source of the infringement, or uphold our rights. We may need to resort to litigation to enforce our intellectual property rights, including any patents issued to us (if any) or our licensors. If a competitor or other third-party files a patent application claiming technology also invented by us, in order to protect our rights, we may have to participate in an expensive and time-consuming opposition proceeding before the European Patent Office, the USPTO or patent authorities or courts in other jurisdictions, with an uncertain outcome and which may have a material adverse effect on our business, financial condition, results of operations and prospects.

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In addition, our success depends in part on avoiding the infringement of other parties’ patents and other intellectual property rights as well as avoiding the breach of any licenses relating to our technologies and products. In the United States, patent applications filed in recent years are confidential for 18 months, while older applications are not published until the patent issues. As a result, avoiding patent infringement may be difficult and we may inadvertently infringe third-party patents or proprietary rights. Countering infringement or unauthorized use claims or to defend against such claims and challenges can be expensive and time consuming. In addition, there could be public announcements of the results of hearings, motions or other interim proceedings or developments and if securities analysts or investors perceive these results to be negative, it could have a substantial adverse effect on the price of our ordinary shares.

Even if resolved in our favor, litigation or other legal proceedings relating to intellectual property claims may cause us to incur significant expenses, and could distract our technical and management personnel from their normal responsibilities. Such litigation or proceedings could substantially increase our operating losses and reduce the resources available for development activities or any future sales, commercialization or distribution activities. We may not have sufficient financial or other resources to adequately conduct such litigation or proceedings. Some of our competitors may be able to sustain the costs of such litigation or proceedings more effectively than we can because of their greater financial resources and more mature and developed intellectual property portfolios. Uncertainties resulting from the initiation and continuation of patent litigation or other proceedings could have a material adverse effect on our ability to compete in the marketplace.

Obtaining and maintaining our patent protection depends on compliance with various procedural, document submission, fee payment and other requirements imposed by government patent agencies, and our patent protection could be reduced or eliminated for non-compliance with these requirements.

Periodic maintenance fees, renewal fees, annuity fees and various other government fees on patents and/or applications will be due to be paid to various patent agencies over the lifetime of our licensed patents and/or applications and any patent rights we may own in the future. Patent agencies also require compliance with several procedural fee payments and other similar provisions during the patent application process. In many cases, an inadvertent lapse can be cured by payment of a late fee or by other means in accordance with the applicable rules. There are situations, however, in which non-compliance can result in abandonment or lapse of the patent or patent application, resulting in partial or complete loss of patent rights in the relevant jurisdiction. In such an event, potential competitors might be able to enter the market and this circumstance could have a material adverse effect on our business.

We may not be successful in obtaining necessary rights to any product candidates we may develop through acquisitions and licenses.

Many pharmaceutical companies, biotechnology companies, and academic institutions are competing with us and filing patent applications potentially relevant to our business. If patents issued to third parties contain valid claims that cover our product candidates or their manufacture or uses or assays relevant to our development plans, in order to avoid infringing these patents, we may be required or find it prudent to obtain licenses to these patents or to develop or obtain alternative technology. However, we may be unable to secure such licenses or otherwise acquire or license any compositions, methods of use, processes, or other intellectual property rights from third parties that we identify as necessary for product candidates we may develop. The licensing or acquisition of third-party intellectual property rights is a competitive area, and several more established companies may pursue strategies to license or acquire third-party intellectual property rights that we may consider attractive or necessary. These established companies may have a competitive advantage over us due to their size, capital resources and greater clinical development and commercialization capabilities. In addition, companies that perceive us to be a competitor may be unwilling to assign or license rights to us. We also may be unable to license or acquire third-party intellectual property rights on terms that would allow us to make an appropriate return on our investment or at all. If we are unable to successfully obtain rights to required third-party intellectual property rights or maintain the existing intellectual property rights we have, we may have to abandon development of the relevant program or product candidate.

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In addition, if a patent is issued to a third-party that covers our product candidates or their manufacture or uses or assays related to our technology or product candidates and we cannot obtain a license to such patent, then we may not be in a position to commercialize such technology or product candidates unless we develop non-infringing alternative or successfully pursue litigation to have that patent invalidated or enter into a licensing arrangement with the patent holder. Any such litigation would be time consuming and costly, and the outcome would not be guaranteed. We cannot be certain that we would be able to enter into a licensing agreement with the patent holder on commercially reasonable terms, if at all. In either case, our business prospects could be materially adversely affected.

Intellectual property rights do not necessarily address all potential risks to our competitive advantage.

The degree of future protection afforded by our intellectual property rights is uncertain because intellectual property rights have limitations and may not adequately protect our business or permit us to maintain our competitive advantage. For example:

| • |  | others may be able to make products that are similar to any product candidates we may develop or utilize similar technology but that are not covered by the claims of the patents that we license or may own in the future;

| • |  | we, or our license partners or current or future collaborators, might not have been the first to make the inventions covered by the issued patent (if any) or pending patent application that we license or may own in the future;

| • |  | we, or our license partners or current or future collaborators, might not have been the first to file patent applications covering certain of our or their inventions;

| • |  | others may independently develop similar or alternative technologies or duplicate any of our technologies without infringing our owned or licensed intellectual property rights;

| • |  | it is possible that patent applications that we currently, or may in the future, own or license will not lead to issued patents;

| • |  | the claims of patents or patent applications that we may own or license may, when issued, not cover our product candidates;

| • |  | issued patents (if any) that we may hold rights to may be held invalid or unenforceable, including as a result of legal challenges by our competitors;

| • |  | our competitors might conduct research and development activities in countries where we do not have patent rights and then use the information learned from such activities to develop competitive products for sale in our major commercial markets;

| • |  | we may not develop additional proprietary technologies that are patentable;

| • |  | the patents of others may harm our business; and

| • |  | we may choose not to file a patent in order to maintain certain trade secrets or know-how, and a third-party may subsequently file a patent covering such intellectual property.

Should any of these events occur, they could have a material adverse effect on our business, financial condition, results of operations and prospects.

Risks Related to Our Business and Industry

Our relationships with health care professionals, institutional providers, principal investigators, consultants, customers and third-party payors are, and will continue to be, subject, directly and indirectly, to laws and regulations on health care fraud and abuse, false claims, commercialization expenditure

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tracking and disclosure, and health information privacy and security. If we are unable to comply, or have not fully complied, with such laws, we could face penalties, including, without limitation, civil, criminal, and administrative penalties, damages, fines, exclusion from government-funded health care programs and the curtailment or restructuring of our operations.

Although we do not currently have any products on the market, our business operations and activities may be directly or indirectly subject to various laws and regulations on health care fraud and abuse, false claims, commercialization expenditure tracking and disclosure, and health information privacy and security. If we obtain approval for any of our product candidates from the FDA or comparable other regulatory authorities and begin commercializing those products in geographies for which they have been approved, our potential exposure under such laws will increase significantly, and our costs associated with compliance with such laws are also likely to increase. These laws may impact, among other things, our current activities with principal investigators and research subjects, as well as proposed and future sales, marketing and education programs.

The laws that may affect our ability to operate include, but are not limited to:

| • |  | the federal Anti-Kickback Statute, which is an intent-based federal criminal statute that prohibits, among other things, persons from knowingly and willfully soliciting, offering, receiving or providing any remuneration, directly or indirectly, in cash or in kind, to induce or reward either the referral of an individual for, or the purchase, lease, order, recommendation or arranging of, any item or service, for which payment may be made, in whole or in part, under a federal health care program such as Medicare and Medicaid;

| • |  | the federal civil False Claims Act, which imposes civil penalties, including through civil whistleblower or qui tam actions, against individuals or entities for, among other things, knowingly presenting, or causing to be presented, false or fraudulent claims for payment to a federal health care program or knowingly making using or causing to be made or used a false statement or record material to payment of a false claim or avoiding, decreasing or concealing an obligation to pay money to the federal government;

| • |  | the federal criminal statute on false statements relating to health care matters, which prohibits knowingly and willfully falsifying, concealing or covering up a material fact or making any materially false, fictitious, or fraudulent statements or representations in connection with the delivery of or payment for health care benefits, items or services;

| • |  | the federal criminal health care fraud statute, enacted as a part of the Health Insurance Portability and Accountability Act of 1996, or HIPAA, which imposes criminal and civil liability for executing, or attempting to execute, a scheme or artifice to defraud any health care benefit program or to obtain, by means of false or fraudulent pretenses, representations, or promises, any of the money or property owned by, or under the custody or control of, any health care benefit program in connection with the delivery of or payment for healthcare benefits, items, or services;

| • |  | HIPAA, as amended by the Health Information Technology for Economic and Clinical Health Act of 2009 and their respective implementing regulations, which impose requirements on certain covered health care providers, health plans, and health care clearinghouses as well as their respective business associates that perform services for them that involve the use, or disclosure of individually identifiable health information, relating to the privacy, security and transmission of individually identifiable health information without appropriate authorization;

| • |  | laws in all 50 U.S. states require businesses to provide notice to customers whose personally identifiable information has been disclosed as a result of a data breach, and certain U.S. state laws impose particular requirements relating to the handling of sensitive data, such as health information;

| • |  | the federal Physician Payments Sunshine Act that requires “applicable manufacturers” of drugs, devices, biologics and medical supplies for which payment is available under Medicare, Medicaid or the State Children’s Health Insurance Program, among others, to track and report annually to the Department of Health and Human Services (for disclosure to the public) information related to certain

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| payments and other transfers of value to “covered recipients”, which includes U.S.-licensed physicians, teaching hospitals and, for reports submitted on or after January 1, 2022, physician assistants, nurse practitioners, clinical nurse specialists, certified nurse anesthetists, and certified nurse midwives;

| • |  | federal consumer protection and unfair competition laws, which broadly regulate marketplace activities and activities that potentially harm consumers;

| • |  | the Foreign Corrupt Practices Act, or the FCPA, a U.S. law which regulates certain financial relationships with foreign government officials which could include, for example, certain medical professionals;

| • |  | analogous U.S. state law equivalents to the above federal laws, such as analogous state laws to the Anti-Kickback Statute and the False Claims Act, which may apply to items and services reimbursed by any third-party payor, including commercial insurers (i.e., so-called “all-payor anti-kickback laws”);

| • |  | U.S. state laws regulating pharmaceutical manufacturer compliance programs, commercialization-related activities, drug price transparency disclosures, and other practices; and

| • |  | analogous foreign laws and regulations.

The Affordable Care Act, among other things, amended the intent standard of the federal Anti-Kickback Statute and criminal health care fraud statutes to a stricter standard such that a person or entity no longer needs to have actual knowledge of this statute or specific intent to violate it. In addition, the Affordable Care Act codified case law that a claim including items or services resulting from a violation of the federal Anti-Kickback Statute constitutes a false or fraudulent claim for purposes of the federal False Claims Act.

Efforts to ensure that our business arrangements will comply with applicable health care laws may involve substantial costs. It is possible that governmental and enforcement authorities will conclude that our business practices may not comply with current or future statutes, regulations, guidance or case law interpreting applicable fraud and abuse or other health care laws and regulations. If we are unable to comply, or have not fully complied, with such laws, we could face penalties, including, without limitation, civil, criminal, and administrative penalties, damages, fines, exclusion from government funded health care programs, such as Medicare and Medicaid, disgorgement, reputational harm, additional oversight and reporting obligations pursuant to a corporate integrity agreement or similar agreement to resolve allegations of non-compliance with applicable laws and regulations, and the curtailment or restructuring of our operations, any of which could adversely affect our ability to market our products, if approved, and adversely impact our financial results. Although effective compliance programs can mitigate the risk of investigation and prosecution for violations of these laws and regulations, these risks cannot be entirely eliminated. Any action against us for an alleged or suspected violation could cause us to incur significant legal expenses and could divert our management’s attention from the operation of our business, even if our defense is successful. If any of the physicians or other healthcare providers or entities with whom we expect to do business is found not to be in compliance with applicable laws, it may be costly to us in terms of money, time and resources, and they may be subject to criminal, civil or administrative sanctions, including exclusions from government-funded healthcare programs.

In addition, the regulatory approval and commercialization of any of our product candidates outside the United States will also likely subject us to foreign equivalents of the health care laws mentioned above, among other foreign laws.

Rapid technological change could make our product candidates or technologies obsolete.

Pharmaceutical technologies and products are subject to rapid and significant technological change. We expect our competitors and physicians will develop new technologies, protocols and products that may render our product candidates and drug formulation technologies uncompetitive or obsolete. The products, protocols and technologies of our competitors and physicians may be more effective than the products, product candidates and

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drug formulation technologies developed by us. As a result, our product candidates may become obsolete before we recover expenses incurred in connection with their development or realize revenues from any commercialized product. We are aware of other pharmaceutical companies that are developing competing technologies, which could render our product candidates obsolete, which would have a material adverse effect on our business, financial condition, results of operations and prospects.

Our business may become subject to economic, political, regulatory and other risks associated with international operations.

Our business is subject to risks associated with conducting business internationally. Many of our suppliers and collaborative and clinical trial relationships are located in different countries. Accordingly, our future results could be harmed by a variety of factors, including, but not limited to:

| • |  | economic weakness, including inflation, or political instability in particular economies and markets;

| • |  | differing regulatory requirements for drug approvals in different jurisdictions;

| • |  | differing jurisdictions could present different issues for securing, maintaining and/or obtaining freedom to operate in such jurisdictions;

| • |  | potentially reduced protection for intellectual property rights;

| • |  | difficulties in compliance with laws and regulations;

| • |  | changes in regulations and customs, tariffs and trade barriers;

| • |  | changes in currency exchange rates of the euro and currency controls;

| • |  | changes in a specific country’s or region’s political or economic environment;

| • |  | trade protection measures, import or export licensing requirements or other restrictive actions by various governments;

| • |  | differing reimbursement regimes and price controls in certain markets;

| • |  | negative consequences from changes in tax laws;

| • |  | compliance with tax, employment, immigration and labor laws for employees living or traveling abroad;

| • |  | workforce uncertainty in countries where labor unrest is more common than in the United States;

| • |  | difficulties associated with staffing and managing international operations, including differing labor relations;

| • |  | production shortages resulting from any events affecting raw material supply or manufacturing capabilities abroad; and

| • |  | business interruptions resulting from geopolitical actions, including war and terrorism, or natural disasters including earthquakes, typhoons, floods and fires.

If we do not achieve our projected development goals in the timeframes we announce and expect, the commercialization of our products may be delayed and, as a result, our stock price may decline.

From time to time, we estimate the timing of the anticipated accomplishment of various scientific, clinical, regulatory and other product development goals, which we sometimes refer to as milestones. These milestones may include the commencement or completion of scientific studies and clinical trials and the submission of regulatory filings. From time to time, we may publicly announce the expected timing of some of these milestones. All of these milestones are and will be based on numerous assumptions. The actual timing of these milestones can vary dramatically compared to our estimates, in some cases for reasons beyond our control. If we do not meet these milestones as publicly announced, or at all, the commercialization of our products may be delayed or never achieved and, as a result, our stock price may decline.

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Risks Related to Legal Compliance Matters

Because we and our suppliers are subject to environmental, health and safety laws and regulations, we may become exposed to enforcement, liability and substantial expenses in connection with environmental compliance or remediation activities which may adversely affect our business and financial condition.

Our operations, including our research, development, testing and manufacturing activities, are subject to numerous environmental, health and safety laws and regulations, and possible permit obligations. These laws, regulations, including any permit obligations, govern, among other things, the controlled use, storage, handling, release and disposal of, and the maintenance of a registry for, hazardous materials and biological materials (goods and substances), chemicals, biological materials and biotechnology. Our operations produce hazardous waste products. We contract with licensed third parties for the disposal of these materials, substances and wastes. Apart from compliance with the applicable regulations, we may not be able to eliminate the risk of contamination or injury from these materials completely. In the event of contamination or injury resulting from any use of hazardous materials, we could be held liable for any resulting damages. We also could incur significant costs associated with civil, administrative and/or criminal fines and penalties for failure to comply all of these laws, regulations, and associated compliance activities.

The third parties with whom we contract to manufacture our product candidates are also subject to these and other environmental, health and safety laws and regulations. Liabilities they incur pursuant to these laws and regulations or any violations thereof could result in significant costs, significant administrative, civil and/or criminal fines, measurements and/or sanctions, or in certain circumstances, an interruption in operations, any of which could adversely impact our business and financial condition, especially if we are unable to find an alternate supplier in a timely manner.

Environmental, health and safety laws and regulations are becoming more stringent and enforcement is prioritized. We may be required to incur substantial expenses in connection with current and future environmental, health and/ or safety compliance, our duty of care in this regard, remediation obligations and/or measurement obligations, in which case, our production and development efforts may be interrupted or delayed and our financial condition and results of operations may be materially adversely affected.

We, our employees, contractors, principal investigators, CROs, consultants, agents, vendors and collaboration partners may engage in misconduct or other improper activities, including noncompliance with regulatory standards and requirements, which could have a material adverse effect on our business.

We are exposed to the risk that we, our employees, contractors, principal investigators, CROs, consultants, agents, vendors and collaboration partners may engage in fraudulent conduct or other illegal activities. Misconduct by these parties could include intentional, reckless and negligent conduct or unauthorized activities that violate, among other things: (i) the legal requirements or other requirements of the FDA and comparable authorities, including those laws that require the reporting of true, complete and accurate information to such authorities; (ii) manufacturing standards; (iii) data privacy, security, fraud and abuse and other healthcare laws and regulations; or (iv) laws that require the reporting of true, complete and accurate financial information and data. In particular, our business activities may be subject to the FCPA and anti-bribery or anti–corruption laws, regulations or rules in other relevant countries for our activities, including the U.K. Bribery Act. The FCPA generally prohibits offering, promising, giving, or authorizing others to give anything of value, either directly or indirectly, to a non-U.S. government official in order to influence official action, or otherwise obtain or retain business. The FCPA also requires public companies to make and keep books and records that accurately and fairly reflect the transactions of the corporation and to devise and maintain an adequate system of internal accounting controls. Our business is heavily regulated and therefore involves significant interaction with public officials, including officials of non-U.S. governments. Additionally, in many other countries, the health care providers who prescribe pharmaceuticals are (directly or indirectly) employed by their government, and the purchasers of pharmaceuticals are government entities; therefore, our dealings with these prescribers and purchasers are subject to regulation under, but not limited to, the FCPA. Recently the SEC and Department of Justice have also increased their FCPA enforcement activities with respect to pharmaceutical companies.

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Sales, commercialization and business arrangements in the healthcare industry are generally subject to extensive laws and regulations intended to prevent fraud, misconduct, bribery (e.g. kickbacks), self-dealing and other abusive practices. These laws and regulations may restrict or prohibit a wide range of pricing, discounting, marketing and promotion, sales commission, customer incentive programs and other business arrangements. Activities subject to these laws and regulations could also involve the improper use or misrepresentation of information obtained in the course of clinical trials or creating fraudulent data in our preclinical studies or clinical trials, which could result in enforcement and/or sanctions and cause serious harm to our reputation.

Further, we are subject to trade and economic sanctions and embargoes on certain countries, persons, groups, entities, projects and/or activities, and export control regulations, applicable in the United States and other relevant countries for our activities.

There is no certainty that all of our employees, agents, contractors, principal investigators, CROs, consultants, vendors or (other) collaborators, or those of our affiliates, will comply with all applicable laws and regulations, particularly given the high level of complexity of these laws. It is not always possible to identify and deter misconduct by these parties and other third-parties, and the precautions we take to detect and prevent this activity may not be effective in controlling unknown or unmanaged risks or losses or in protecting us from governmental investigations or other actions, claims or lawsuits stemming from a failure to comply with such laws or regulations. If any such actions are instituted against us, and we are not successful in defending ourselves or asserting our rights, those actions could result, among others, in significant administrative, civil and criminal fines, disgorgement, and other sanctions, remedial measures or consequences, such as the closing down of our facilities, exclusion from participation in federal healthcare programs including Medicare and Medicaid, integrity and compliance oversight and reporting obligations, and prohibitions on the conduct of our business. Any such violations and consequences could materially damage our reputation, our brand, our international expansion efforts, our ability to attract and retain employees, and our business, prospects, operating results and financial condition.

Risks Related to Our Ordinary Shares and This Offering

There has been no prior public market for our ordinary shares and an active and liquid market for our ordinary shares may fail to develop, which could harm the market price of our ordinary shares.

Prior to this offering, there has been no public market for our ordinary shares. Although our ordinary shares have been approved for listing on Nasdaq, an active trading market for our ordinary shares may never develop or be sustained following this offering. The initial public offering price of our ordinary shares was based and determined through negotiations between us and the underwriters. This initial public offering price may not be indicative of the market price of our ordinary shares after this offering. In the absence of an active trading market for our ordinary shares, investors may not be able to sell their ordinary shares at or above the initial public offering price or at the time that they would like to sell.

The ownership of our ordinary shares is concentrated and your interests may conflict with the interests of our significant shareholders.

We have a number of significant shareholders that will beneficially own ordinary shares representing approximately 60% of our outstanding ordinary shares upon consummation of this offering. For more information regarding our significant shareholders, please see “Principal Shareholders.”

These significant shareholders have in the past often taken a similar position and exercised influence over matters requiring approval of our shareholders or our Board. They may act jointly or independently in the future, and will continue to be able to exert significant influence over the outcome of matters requiring approval of our shareholders or our Board, including but not limited to the approval of significant transactions. Their interests may differ from the interests of other shareholders. Among other consequences, this concentration of ownership may have the effect of delaying or preventing a change in control and might therefore negatively affect the market price of our ordinary shares.

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You will incur immediate and substantial dilution as a result of this offering.

If you purchase ordinary shares in this offering, you will incur immediate and substantial dilution of €9.70 ($11.35) per ordinary share, after giving effect to the sale by us of the ordinary shares offered by us in the offering and after deducting the underwriting discounts and commissions and estimated offering expenses payable by us, and our as further adjusted net tangible book value estimated at September 30, 2020 would have been approximately €235.2 ($275.3) million, representing €7.39 ($8.65) per ordinary share. This represents an immediate increase in as adjusted net tangible book value of €2.89 ($3.39) per ordinary share to existing shareholders and an immediate dilution in as further adjusted net tangible book value of €9.70 ($11.35) per ordinary share to new investors purchasing ordinary shares in this offering. Dilution for this purpose represents the difference between the price per ordinary share paid by these purchasers and as further adjusted net tangible book value per ordinary share immediately after the completion of the offering. As a result of the dilution to investors purchasing ordinary shares in this offering, investors may receive significantly less than the purchase price paid in this offering, if anything, in the event of our liquidation. For more information on the dilution you may suffer as a result of investing in this offering, see the section of this prospectus titled “Dilution.”

We do not currently intend to pay dividends on our securities and, consequently, your ability to achieve a return on your investment will depend on appreciation in the price of our ordinary shares. In addition, any distribution of dividends must be in accordance with the rules and restrictions applying under Dutch law.

We have not declared or paid any cash dividends on our ordinary shares since our incorporation and do not currently intend to pay cash dividends on our ordinary shares in the foreseeable future. We expect to retain all earnings, if any, generated by our operations for the development and growth of our business. Therefore, you are not likely to receive any dividends on your ordinary shares for the foreseeable future and the success of an investment in our ordinary shares will depend upon any future appreciation in our value. Consequently, investors may need to sell all or part of their holdings of ordinary shares after price appreciation, which may never occur, as the only way to realize any future gains on their investment. There is no guarantee that our ordinary shares will appreciate in value or even maintain the price at which our shareholders have purchased our ordinary shares. Investors seeking cash dividends should not purchase ordinary shares.

Under Dutch law and following the consummation of this offering, we may only pay dividends to the extent our shareholders’ equity (eigen vermogen) exceeds the sum of the paid-up and called-up share capital plus the reserves required to be maintained by Dutch law or by our Articles of Association that will be effective upon consummation of this offering and (if it concerns a distribution of profits) after adoption of the annual accounts by our general meeting from which it appears that such distribution is allowed. Subject to such restrictions, any future determination to pay dividends will be at the discretion of the Board and will depend on a number of factors, including our results of operations, earnings, cash flow, financial condition, future prospects, contractual restrictions, capital investment requirements, restrictions imposed by applicable law and other factors considered relevant by the Board.

Under our Articles of Association that will be effective upon consummation of this offering, if any preferred shares are or have been outstanding, a dividend is first paid out of the profit, if available for distribution, to the holders or former holders, as applicable, of those preferred shares to the extent they are entitled to such distribution under our Articles of Association, which we refer to as our preferred dividend. Our Board may decide that all or part of our remaining profits shall be added to our reserves. After such reservation any remaining profit will be at the disposal of the general meeting at the proposal of our Board for distribution on our ordinary shares, subject to the applicable restrictions of Dutch law. Our Board is permitted, subject to certain requirements, to declare interim dividends without the approval of the general meeting. Dividends and other distributions shall be made payable not later than the date determined by the Board. Claims to dividends and other distributions not made within five years from the date that such dividends or distributions became payable will lapse and any such amounts will be considered to have been forfeited to us (verjaring).

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In addition, exchange rate fluctuations may affect the amount of euros that we are able to distribute, and the amount in U.S. dollars that our shareholders receive upon the payment of cash dividends or other distributions we declare and pay in euros, if any. These factors could harm the value of our ordinary shares, and, in turn, the U.S. dollar proceeds that holders receive from the sale of our ordinary shares.

If we do pay dividends, such dividends paid by us on our ordinary shares may be subject to Dutch dividend withholding tax and, if such dividends are paid to certain related parties in low-taxed jurisdictions, might in the future become subject to an additional Dutch withholding tax on dividends, in addition to the applicable Dutch dividend withholding tax.

Under current Dutch tax law, dividends paid by us on our ordinary shares are in principle subject to Dutch dividend withholding tax at a rate of 15% under the Dutch Dividend Withholding Tax Act 1965 (Wet op de dividendbelasting 1965), unless a domestic or treaty exemption or reduction applies.

In a letter to the Dutch parliament dated May 29, 2020, the Dutch State Secretary for Finance announced that the Dutch government intends to introduce an additional withholding tax on dividends paid to related entities (as described below) in jurisdictions that have a corporate tax rate below 9% or to jurisdictions included on the EU’s blacklist of non-cooperative jurisdictions and in certain abusive situations, effective January 1, 2024. On September 25, 2020, the Dutch government launched an internet consultation to give interested parties the opportunity to respond to the draft legislative proposal to introduce the conditional withholding tax on dividends. Pursuant to the proposal published for consultation purposes, the conditional withholding tax on dividend payments will be an addition to the recently passed conditional withholding tax on interest and royalty payments pursuant to the Dutch Withholding Tax Act 2021 (Wet bronbelasting 2021), which act has become effective January 1, 2021. For purposes of the Dutch Withholding Tax Act 2021, generally an entity is considered a related entity if such entity has a “qualifying interest” in us, generally meaning an interest – either individually or jointly as part of a collaborating group (samenwerkende groep) – that enables the holder of such interest to exercise a decisive influence on the decisions that can determine our activities.

It is possible that the rate will be as high as the highest Dutch corporate income tax rate (currently 25%) at the time of the dividend payment, which will be the statutory rate applicable to interest and royalty payments to related entities in jurisdictions that have a corporate tax rate below 9% or to jurisdictions included on the EU’s blacklist of non-cooperative jurisdictions and in certain abusive situations.

At the same time, the current Dutch dividend withholding tax regime is anticipated to remain in place. However, if the dividend withholding tax and the conditional withholding tax on dividends cumulate, the conditional withholding tax will be reduced by the dividend withholding tax levied. As a result, if the shareholder being a related entity is established in a jurisdiction that has a corporate tax rate below 9% or in a jurisdiction included on the EU’s blacklist of non-cooperative jurisdictions, the tax rate on dividends may rise from 15% to 25%. The internet consultation closed on October 23, 2020. After the internet consultation, the Dutch government aims to prepare the final legislative proposal in early 2021.

We have broad discretion in the use of the net proceeds from the offering and may not use them effectively.

Our Board will have broad discretion in applying the net proceeds of this offering and investors will be relying on our judgment regarding the application of the net proceeds of this offering. See “Use of Proceeds.” In addition, we might decide to postpone or not pursue certain clinical trials or other activities if the net proceeds from this offering and our other sources of cash are less than expected. Pending their use, we may invest the net proceeds from the offering in a manner that does not produce income or that loses value. These investments may not yield a favorable return to our investors.

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Based on our planned use of the net proceeds of the offering and our current cash, cash equivalents and current financial assets, we estimate that such funds will be sufficient to enable us to fund our operating expenses and capital expenditure requirements through at least the next 24 months. We have based this estimate on assumptions that may prove to be incorrect, and we could use our available capital resources sooner than we currently expect. The failure by our management to apply these funds effectively could harm our business and financial condition.

A significant portion of our ordinary shares may be sold into the public market in the near future, which could cause the market price of our ordinary shares to drop significantly, even if our business is doing well.

Future sales of our ordinary shares in the public market after this offering and the availability of ordinary shares for future sale could adversely affect the market price of our ordinary shares prevailing from time to time. Certain of our ordinary shares currently outstanding will not be available for sale shortly after this offering due to contractual restrictions on transfers of ordinary shares under certain lock-up agreements. Upon the expiration of these lock-up agreements 31,839,776 ordinary shares will be eligible for sale 180 days after the date of this prospectus, provided that ordinary shares held by our affiliates will remain subject to volume, manner of sale, and other resale limitations set forth in Rule 144 (in the case of our affiliates). Furthermore, under our Articles of Association that will be effective upon the consummation of this offering, we will be authorized to issue up to 58,750,000 ordinary shares, of which 31,839,776 ordinary shares will be outstanding following this offering. 180 days following the date of this prospectus, we would no longer be restricted under the terms of our lock-up agreement from issuing or offering additional ordinary shares. Sales of substantial numbers of ordinary shares, or the perception that these sales could occur, could adversely affect prevailing market prices for our ordinary shares and could impair our future ability to raise equity capital.

In addition, the ordinary shares subject to our equity incentive plans and the ordinary shares reserved for future delivery under such plans will become eligible for sale in the public market in the future, subject to certain legal and contractual limitations. Following this offering, we intend to file one or more registration statements on Form S-8 with the SEC, covering our ordinary shares available for future issuance under our equity incentive plans. Upon effectiveness of such registration statements, any ordinary shares subsequently issued under such plans will be eligible for sale in the public market, except to the extent that they are restricted by the lock-up agreements referred to above and subject to compliance with Rule 144 in the case of our affiliates. Sales of a large number of the ordinary shares issued under these plans in the public market could have an adverse effect on the market price of our ordinary shares. If these additional ordinary shares are sold, or if it is perceived that they will be sold in the public market, the trading price of our ordinary shares could decline substantially.

We are not obligated to, and do not, comply with all best practice provisions of the Dutch Corporate Governance Code.

Upon the consummation of this offering, we will be subject to the Dutch Corporate Governance Code, or the DCGC. The DCGC contains both principles and best practice provisions on corporate governance that regulate relations between the Board and the general meeting and matters in respect of financial reporting, auditors, disclosure, compliance and enforcement standards. The DCGC is based on a “comply or explain” principle. Accordingly, companies are required to disclose in their annual reports, filed in the Netherlands, whether they comply with the provisions of the DCGC. If they do not comply with those provisions (for example, because of a conflicting Nasdaq requirement), the company is required to give the reasons for such noncompliance. The DCGC applies to Dutch companies listed on a government-recognized stock exchange, whether in the Netherlands or elsewhere, including Nasdaq. We do not comply with all best practice provisions of the DCGC. See “Description of Share Capital and Articles of Association.” This may affect your rights as a shareholder and you may not have the same level of protection as a shareholder in a Dutch company that fully complies with the DCGC.

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As a foreign private issuer, we are permitted to adopt certain home country practices in relation to corporate governance matters that differ significantly from Nasdaq corporate governance listing standards. These practices may afford less protection to shareholders than they would enjoy if we complied fully with Nasdaq corporate governance listing standards.

We are a “foreign private issuer,” as defined in the SEC’s rules and regulations. The Nasdaq Listing Rules include certain accommodations in the corporate governance requirements that allow foreign private issuers to follow “home country” corporate governance practices in lieu of the otherwise applicable corporate governance standards of Nasdaq. The application of such exceptions requires that we disclose the Nasdaq Listing Rules that we do not follow and describe the Dutch corporate governance standards, including those as per the DCGC that we do follow in lieu of the relevant Nasdaq corporate governance standard. We intend to continue to follow Dutch corporate governance practices in lieu of the corporate governance requirements of Nasdaq in certain respects.

In accordance with Dutch law and generally accepted business practices, our Articles of Association do not provide quorum requirements generally applicable to general meetings of shareholders. To this extent, our practice varies from the requirement of Nasdaq Listing Rule 5620(c), which requires an issuer to provide in its bylaws for a generally applicable quorum, and that such quorum may not be less than one-third of the outstanding voting stock. Although we must provide shareholders with an agenda and other relevant documents for the general meeting of shareholders, Dutch law does not have a regulatory regime for the solicitation of proxies and the solicitation of proxies is not a generally accepted business practice in the Netherlands, thus our practice will vary from the requirement of Nasdaq Listing Rule 5620(b). As permitted by the listing requirements of Nasdaq, we have also opted out of the requirements of Nasdaq Listing Rule 5610, which requires an issuer to disclose within four business days any waiver of the code of conduct that has been granted to directors and officers. We will also rely on the phase-in provisions of Rule 10A-3 of the Exchange Act and the Nasdaq transition rules applicable to companies completing an initial public offering, which require all members of our audit committee meet the independence standard for audit committee membership within one year of the effectiveness of the registration statement of which this prospectus forms a part. In addition, we have opted out of shareholder approval requirements, as included in the Nasdaq Listing Rules, for the issuance of securities in connection with certain events such as the acquisition of shares or assets of another company, the establishment of or amendments to equity-based compensation plans for employees, a change of control of us and certain private placements. To this extent, our practice varies from the requirements of Nasdaq Rule 5635, which generally requires an issuer to obtain shareholder approval for the issuance of securities in connection with such events.

For an overview of our corporate governance principles, see “Description of Share Capital and Articles of Association.” Accordingly, you may not have the same protections afforded to shareholders of companies that are subject to these Nasdaq requirements.

We are a foreign private issuer and, as a result, we are not subject to U.S. proxy rules and are subject to Exchange Act reporting obligations that, to some extent, are more lenient and less frequent than those of a U.S. domestic public company.

We will report under the Exchange Act as a non-U.S. company with foreign private issuer status. Because we qualify as a foreign private issuer under the Exchange Act, we are exempt from certain provisions of the Exchange Act that are applicable to U.S. domestic public companies, including (i) the sections of the Exchange Act regulating the solicitation of proxies, consents or authorizations in respect of a security registered under the Exchange Act, (ii) the sections of the Exchange Act requiring insiders to file public reports of their stock ownership and trading activities and liability for insiders who profit from trades made in a short period of time and (iii) the rules under the Exchange Act requiring the filing with the SEC of annual reports on Form 10-Q containing unaudited financial and other specified information, or current reports on Form 8-K, upon the occurrence of specified significant events. In addition, foreign private issuers are not required to file their annual report on Form 20-F until four months after the end of each fiscal year, while U.S. domestic issuers that are accelerated filers are required to file their annual report on Form 10-K within 75 days after the end of each fiscal

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year. Foreign private issuers are also exempt from the Regulation Fair Disclosure, aimed at preventing issuers from making selective disclosures of material information. As a result of the above, you may not have the same protections afforded to shareholders of companies that are not foreign private issuers.

We may lose our foreign private issuer status in the future, which could result in significant additional cost and expense.

While we currently qualify as a foreign private issuer, the determination of foreign private issuer status is made annually on the last business day of an issuer’s most recently completed second fiscal quarter. In the future, we would lose our foreign private issuer status if we to fail to meet the requirements necessary to maintain our foreign private issuer status as of the relevant determination date. For example, if more than 50% of our securities are held by U.S. residents and more than 50% of either our directors or executive officers are residents or citizens of the United States, we could lose our foreign private issuer status.

The regulatory and compliance costs to us under U.S. securities laws as a U.S. domestic issuer may be significantly more than costs we incur as a foreign private issuer. If we are not a foreign private issuer, we will be required to file periodic reports and registration statements on U.S. domestic issuer forms with the SEC, which are more detailed and extensive in certain respects than the forms available to a foreign private issuer. We would be required under current SEC rules to prepare our financial statements in accordance with U.S. Generally Accepted Accounting Principles, or U.S. GAAP, rather than IFRS. Such conversion of our financial statements to U.S. GAAP would involve significant time and cost, and we would still be required to prepare financial statements in accordance with IFRS as required by Dutch law. In addition, we may lose our ability to rely upon exemptions from certain corporate governance requirements on United States stock exchanges that are available to foreign private issuers such as the ones described above and exemptions from procedural requirements related to the solicitation of proxies.

We are eligible to be treated as an “emerging growth company,” as defined in the JOBS Act, and we cannot be certain if the reduced disclosure requirements applicable to emerging growth companies will make our ordinary shares less attractive to investors.

We are an emerging growth company, as defined in the JOBS Act. For as long as we continue to be an emerging growth company, we may take advantage of exemptions from various reporting requirements that are applicable to other public companies that are not emerging growth companies, including (i) the ability to include only two years of audited financial statements and only two years of related “Management’s Discussion and Analysis of Financial Condition and Results of Operations” disclosure; (ii) an exemption from the auditor attestation requirement in the assessment of our internal control over financial reporting pursuant to the Sarbanes-Oxley Act; and (iii) to the extent that we no longer qualify as a foreign private issuer, (a) reduced disclosure obligations regarding executive compensation in our periodic reports and proxy statements, and (b) exemptions from the requirements of holding a nonbinding advisory vote on executive compensation, including golden parachute compensation. We cannot predict whether investors will find our ordinary shares less attractive if we rely on these exemptions. If some investors find our ordinary shares less attractive as a result, there may be a less active trading market for our ordinary shares and our share price may be reduced or more volatile.

We may take advantage of these provisions until such time that we are no longer an emerging growth company. We would cease to be an emerging growth company following the fifth anniversary of the date of the completion of this offering or earlier if we have more than $1.07 billion in annual revenues, are deemed to be a “large accelerated filer” under the rules of the SEC, or issue more than $1.0 billion of nonconvertible debt over a three-year period. We may also choose to take advantage of some but not all of these reduced burdens. For example, Section 107 of the JOBS Act provides that an emerging growth company can use the extended transition period provided in Section 7(a)(2)(B) of the Securities Act of 1933, as amended, or the Securities Act, for complying with new or revised accounting standards. Given that we currently report and expect to continue to

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report under IFRS, as issued by the IASB, we have irrevocably elected not to avail ourselves of this extended transition period and, as a result, we will adopt new or revised accounting standards on the relevant dates on which adoption of such standards is required by the IASB. We have taken advantage of reduced reporting requirements in this prospectus. Accordingly, the information contained herein may be different than the information you receive from other public companies in which you hold equity securities.

The rights of shareholders in companies subject to Dutch corporate law differ in material respects from the rights of shareholders of corporations incorporated in the United States.

Prior to the consummation of this offering, we intend to convert into a Dutch public company with limited liability (naamloze vennootschap). Our corporate affairs are, and will be, governed by our Articles of Association, our internal rules and policies and by Dutch law. The rights of shareholders and the responsibilities of members of our Board are in many ways different from the rights and obligations of shareholders and a board of directors in companies governed by the laws of United States jurisdictions. In particular, pursuant to Dutch law members of the Board are required to act in the interest of the company and the sustainable success of its business, with an aim to creating long-term value, taking into account the interests of its employees, clients, shareholders and other stakeholders of the company, in all cases with due observation of the principles of reasonableness and fairness. It is possible that some of these parties will have interests that are different from, or in addition to, your interests as a shareholder.

Dutch corporate law and our Articles of Association contain or may contain provisions that may discourage, delay or prevent a takeover attempt, which could adversely affect the price of our ordinary shares.

Under Dutch law, various protective measures are possible and permissible within the boundaries set by Dutch law and Dutch case law. In this respect, prior to the consummation of this offering, our general meeting shall authorize our Board for a period of five years after our conversion into Pharvaris N.V. to grant a call option to an independent foundation under Dutch law (if and when incorporated), or protective foundation, to acquire preferred shares pursuant to a call option agreement that may be entered into between us and such protective foundation.

This call option, if and when granted, shall be continuous in nature and can be exercised repeatedly on multiple occasions. If the protective foundation, if and when incorporated, would exercise such call option, if and when granted, a number of preferred shares up to 100% of our issued share capital held by others than the protective foundation, minus one share, will be issued to the protective foundation. These preferred shares would then be issued to the protective foundation under the obligation to pay up 25% of their nominal value upon issuance. In order for the protective foundation to finance the issue price in relation to the preferred shares, the protective foundation may enter into a finance arrangement with a bank or other financial institution. As an alternative to securing this external financing, subject to applicable restrictions under Dutch law, the call option agreement, if and when entered into, will provide that the protective foundation may request us to provide, or cause our subsidiaries to provide, sufficient funding to the protective foundation to enable it to satisfy the payment obligation (or part thereof) in cash and/or to charge an amount equal to the payment obligation (or part thereof) against our profits and/or reserves in satisfaction of such payment obligation. The articles of association of the protective foundation, if and when incorporated, will provide that it will promote and protect the interests of the Company, the business connected with the Company and the Company’s stakeholders from time to time, and repressing possible influences which could threaten the strategy, continuity, independence and/or identity of the company or the business connected with it, to such an extent that this could be considered to be damaging to the aforementioned interests. These influences may include a third party acquiring a significant percentage of our ordinary shares, the announcement of an unsolicited public offer for our ordinary shares, shareholder activism, other concentration of control over our ordinary shares or any other form of undue pressure on us to alter our strategic policies. The protective foundation, if and when incorporated, shall be structured to operate independently of us.

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The voting rights of our shares are based on nominal value and, as we expect our ordinary shares to trade substantially in excess of their nominal value, preferred shares issued at 25% of their nominal value can carry significant voting power for a substantially reduced price compared to the price of our ordinary shares and thus can be used as a defensive measure. These preferred shares, if and when issued, will have both a liquidation and dividend preference over our ordinary shares and will accrue a cash preferred dividend at a fixed rate calculated over the amount paid-up on those preferred shares pro rata tempore for the period during which they were outstanding. The protective foundation would be expected to require us to cancel its preferred shares, if and when issued to the protective foundation, once the perceived threat to the company and its stakeholders has been removed or sufficiently mitigated or neutralized. However, subject to the same limitations described above, the protective foundation would, in that case, continue to have the right to exercise the call option in the future in response to a new threat to the interests of us, our business and our stakeholders from time to time.

In addition, we have adopted several provisions that may have the effect of making a takeover of our Company more difficult or less attractive, including:

| • |  | our directors being appointed on the basis of a binding nomination by our Board, which can only be overruled by the general meeting by a resolution adopted by at least a two-thirds majority of the votes cast, provided such majority represents more than half of our issued share capital (in which case the Board shall make a new nomination);

| • |  | a provision that our directors may only be removed by the general meeting by a two-thirds majority of the votes cast representing more than half of our issued share capital if such removal is not proposed by our Board;

| • |  | a provision which allows the most recent (former) chairman of our Board or our most recent (former) chief executive officer to be charged with our management if all of our directors are absent or incapacitated; and

| • |  | requirements that certain matters, including an amendment of our Articles of Association, may only be brought to our shareholders for a vote upon a proposal by our Board.

In addition, Dutch law allows for staggered multi-year terms of our directors, as a result of which only part of our directors may be subject to appointment or re-appointment in any one year.

Shareholders may not be able to exercise preemptive rights and, as a result, may experience substantial dilution upon future issuances of ordinary shares.

In the event of an issuance of our ordinary shares, subject to certain exceptions, each shareholder will have a pro rata preemptive right in proportion to the aggregate nominal value of the ordinary shares held by such holder. These preemptive rights may be restricted or excluded by a resolution of the general meeting or by another corporate body designated by the general meeting. Prior to the closing of this offering, our Board will be authorized, for a period of five years after our conversion into Pharvaris N.V. to issue shares or grant rights to subscribe for shares up to our authorized share capital from time to time and to limit or exclude preemptive rights in connection therewith. This could cause existing shareholders to experience substantial dilution of their interest in us.

U.S. investors may have difficulty enforcing civil liabilities against our company and directors and senior management and the experts named in this prospectus.

We are incorporated under the laws of the Netherlands and have our statutory seat (statutaire zetel) in Leiden, the Netherlands. Some of our assets are located outside the United States and most members of the Board and Senior Management reside outside of the United States. As a result, it may not be possible for investors to effect service of process within the United States upon such persons or to enforce against them or us the U.S. courts’ judgments predicated upon the civil liability provisions of the federal securities laws of the United States.

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Foreign courts may refuse to hear a United States securities law claim because foreign courts may not be the most appropriate forums in which to bring such a claim. Even if a foreign court agrees to hear a claim, it may determine that the law of the jurisdiction in which the foreign court resides, and not U.S. law, is applicable to the claim.

Further, if U.S. law is found to be applicable, the content of applicable U.S. law must be proved as a fact, which can be a time-consuming and costly process, and certain matters of procedure would still be governed by the law of the jurisdiction in which the foreign court resides.

There is currently no treaty between the United States and the Netherlands for the mutual recognition and enforcement of judgments (other than arbitration awards) in civil and commercial matters. Therefore, a final judgment for the payment of money rendered by any federal or state court in the United States based on civil liability, whether or not predicated solely upon the U.S. federal securities laws, would not be enforceable in the Netherlands unless the underlying claim is relitigated before a Dutch court of competent jurisdiction. Under current practice, however, a Dutch court will generally, subject to compliance with certain procedural requirements, grant the same judgment without a review of the merits of the underlying claim if such judgment (i) is a final judgment and has been rendered by a court, which has established its jurisdiction vis-à-vis the relevant Dutch companies or Dutch company, as the case may be, on the basis of internationally accepted grounds of jurisdiction, (ii) has not been rendered in violation of principles of proper procedure (behoorlijke rechtspleging), (iii) is not contrary to the public policy of the Netherlands, and (iv) is not incompatible with (a) a prior judgment of a Dutch court rendered in a dispute between the same parties or (b) a prior judgment of a foreign court rendered in a dispute between the same parties, concerning the same subject matter and based on the same cause of action, provided that such prior judgment is capable of being recognized in the Netherlands and except to the extent that the foreign judgment contravenes Dutch public policy (openbare orde). Dutch courts may deny the recognition and enforcement of punitive damages or other awards. Moreover, a Dutch court may reduce the amount of damages granted by a U.S. court and recognize damages only to the extent that they are necessary to compensate actual losses or damages. Enforcement and recognition of judgments of U.S. courts in the Netherlands are solely governed by the provisions of the Dutch Code of Civil Procedure (Wetboek van Burgerlijke Rechtsvordering).

Additionally, our Articles of Association provide that the U.S. federal district courts shall be the sole and exclusive forum for any claim asserting a cause of action arising under the Securities Act. This choice of forum provision may limit a shareholder’s ability to bring a claim in a judicial forum that it finds favorable for disputes with us or our directors, officers or other employees and may increase the costs associated with such lawsuits, which may discourage such lawsuits against us and our directors, officers and employees.

Based on the foregoing, there can be no assurance that U.S. investors will be able to enforce any judgments obtained against members of the Board, our Senior Management, against us, or certain experts named herein who are residents of or possessing assets in the Netherlands or other countries other than the United States, in U.S. courts in civil and commercial matters, including judgments under the U.S. federal securities laws.

We may be a passive foreign investment company, or “PFIC,” which could result in adverse U.S. federal income tax consequences to U.S. investors.

Under the United States Internal Revenue Code of 1986, as amended, or the Code, we will be a PFIC for any taxable year in which, after the application of certain look-through rules with respect to subsidiaries, either (i) 75% or more of our gross income consists of “passive income,” or (ii) 50% or more of the average quarterly value of our assets consists of assets that produce, or are held for the production of, “passive income.” Passive income generally includes dividends, interest, certain non-active rents and royalties, and capital gains. Based on the nature of our business, our financial statements, our expectations about the nature and amount of our income, assets and activities and the expected price of our ordinary shares in this offering, we do not believe we were a

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PFIC in 2019 and we do not expect to be a PFIC for our current taxable year or in the foreseeable future. In addition, we may, directly or indirectly, hold equity interests in other PFICs. Whether we or any of our subsidiaries will be a PFIC in 2020 or any future year is a factual determination that must be made annually at the close of each taxable year, and, thus, is subject to significant uncertainty, because (i) a determination of whether a company is a PFIC must be made annually after the end of each taxable year and will depend on the composition of our income and assets and the market value of our assets from time to time and (ii) we will hold a substantial amount of cash following this offering, we cannot assure you that we will not be a PFIC for the current or any future taxable year. Accordingly, there can be no assurance that we will not be a PFIC in 2020 or any future taxable year.

If we are a PFIC for any taxable year during which a U.S. Holder (as defined in “Material United States and Dutch Income Tax Considerations—Material U.S. Federal Income Tax Considerations to U.S. Holders”) holds our ordinary shares, we generally would continue to be treated as a PFIC with respect to that U.S. investor for all succeeding years during which the U.S. Holder holds our ordinary shares even if we ceased to meet the threshold requirements for PFIC status, unless certain exceptions apply. Such a U.S. Holder may be subject to adverse U.S. federal income tax consequences, including (i) the treatment of all or a portion of any gain on disposition as ordinary income, (ii) the application of a deferred interest charge on such gain and the receipt of certain dividends and (iii) compliance with certain reporting requirements. There is no assurance that we will provide information that will enable investors to make a qualified electing fund election, also known as a QEF Election, which could mitigate the adverse U.S. federal income tax consequences should we be classified as a PFIC.

For further discussion, see “Material United States and Dutch Income Tax Considerations—Material U.S. Federal Income Tax Considerations to U.S. Holders.”

General Risk Factors

Our internal computer systems, or those used by our clinical investigators, contractors or consultants, may fail or suffer security breaches.

Despite the implementation of security measures, our internal computer systems and those of our contractors and consultants are vulnerable to damage from cyber-attacks or intrusions, including by computer hackers, foreign governments, foreign companies or competitors, or may be breached by employee error, malfeasance or other disruption. A breakdown, invasion, corruption, destruction or interruption of critical information technology systems could negatively impact operations. If our systems are damaged, fail to function properly or otherwise become unavailable, we may incur substantial costs to repair or replace them, and we may experience loss of critical data and interruptions or delays in our ability to perform critical functions, which could adversely affect our business, financial condition or results of operations. For example, the loss of clinical trial data from clinical trials could result in delays in our regulatory approval efforts and significantly increase our costs to recover or reproduce the data. To the extent that any disruption or security breach were to result in a loss of, or damage to, our data or applications, or inappropriate disclosure of confidential or proprietary information, we could be subject to significant fines, penalties or other liabilities and the development and commercialization of our product candidates could be delayed, which could have a material adverse effect on our business, results of operations, financial condition and prospects. Some of the federal, state and foreign government requirements also include obligations of companies to notify regulators and/or individuals of security breaches involving personally identifiable information, which could result from breaches experienced by us or by our vendors, contractors, or organizations with which we have formed strategic relationships. Even though we may have contractual protections with such vendors, contractors, or other organizations, notifications and follow-up actions related to a security breach could impact our reputation and cause us to incur significant costs. Any failure to prevent or mitigate security breaches or improper access to, use, disclosure or other misappropriation of our data or consumers’ personal data could result in significant liability under state (e.g., state breach notification and privacy laws), federal (e.g., the Health Insurance Portability and Accountability Act of 1996 (HIPAA) and the Health Information Technology for Economic and Clinical Health Act (HITECH Act)) and international laws

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(e.g., the GDPR). For example, a breach impacting personal data which is subject to the GDPR could result in fines of up to 20 million Euros or up to 4% of the total worldwide annual turnover of the preceding financial year, whichever is higher, as well as compensation claims for financial or non-financial loss by affected individuals. To the extent that any disruption or security breach resulted in a loss of or damage to our data or applications, or inappropriate disclosure of confidential or proprietary information, we could incur liability and the further development of our product candidates could be delayed. For example, the loss of or damage to clinical trial data, such as from completed or ongoing clinical trials, for any of our product candidates would likely result in delays in our marketing approval efforts and significantly increased costs in an effort to recover or reproduce the data.

We may engage in strategic transactions that could impact our liquidity, increase our expenses and present significant distractions to our management.

We may consider strategic transactions, such as acquisitions of companies, asset purchases and out-licensing or in-licensing of intellectual property, products or technologies. Any future transactions could increase our near and long-term expenditures, result in potentially dilutive issuances of our equity securities, including our ordinary shares, or the incurrence of debt, contingent liabilities, amortization expenses or acquired in process research and development expenses, any of which could affect our financial condition, liquidity and results of operations. Additional potential transactions that we may consider in the future include a variety of business arrangements, including spin-offs, strategic partnerships, joint ventures, restructurings, divestitures, business combinations and investments. These transactions may never be successful and may require significant time and attention of management. In addition, the integration of any business that we may acquire in the future may disrupt our existing business and may be a complex, risky and costly endeavor for which we may never realize the anticipated benefits. Accordingly, although there can be no assurance that we will undertake or successfully complete any transactions of the nature described above, any transactions that we do complete could have a material adverse effect on our business, results of operations, financial condition and prospects.

The market price of our ordinary shares may be highly volatile, and you may not be able to resell our ordinary shares at or above the initial public offering price.

The initial public offering price for our ordinary shares was determined by negotiations between us and the representatives of the underwriters and may not be indicative of prices that will prevail in the trading market for our ordinary shares. Because of our relatively small public float our ordinary shares may be less liquid than the ordinary shares of companies with broader public ownership and trading of a relatively small volume of our ordinary shares may have a greater impact on the market price for our ordinary shares than would be the case if our public float were larger. The market price of our ordinary shares may fluctuate significantly in response to numerous factors, many of which are beyond our control, including, but not limited to:

| • |  | results and timing of clinical trials of our and our competitors’ product candidates;

| • |  | failure of any of our product candidates, if approved, to achieve commercial success;

| • |  | competition from existing products or new products that may emerge;

| • |  | issues in manufacturing our product candidates or future approved products;

| • |  | public concern relating to the commercial value or safety of any of our product candidates;

| • |  | disputes or other developments related to proprietary rights, including patents, litigation matters, and our ability to obtain intellectual property protection for our technologies;

| • |  | failure to adequately protect our trade secrets;

| • |  | additions and departures of key personnel;

| • |  | our inability to raise additional capital or the terms on which we raise it;

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| • |  | period-to-period fluctuations in our financial condition and results of operations, including the timing of receipt of any milestone or other payments under commercialization or licensing agreements;

| • |  | public health crises, illnesses, epidemics or pandemics, such as the COVID-19 pandemic;

| • |  | changes in market conditions for biopharmaceutical stocks;

| • |  | changes in general market and economic conditions; and

| • |  | other risk factors discussed in this section.

In addition, the stock market in general has experienced substantial price and volume fluctuations that have often been unrelated or disproportionate to the operating performance of particular companies affected. These broad market and industry factors may materially harm the market price of our ordinary shares, regardless of our operating performance. As a result of this volatility, you may not be able to sell your ordinary shares at or above the public offering price. As we operate in a single industry, we are especially vulnerable to these factors to the extent that they affect our industry or our product candidates, or to a lesser extent our markets. In the past, securities class action litigation has often been initiated against companies and their management following periods of volatility in their stock price. This type of litigation could result in substantial costs and divert our management’s attention and resources, and could also require us to make substantial payments to satisfy judgments or to settle litigation.

If securities or industry analysts do not publish research or publish inaccurate or unfavorable research about our business, the price of our ordinary shares and trading volume could decline.

The trading market for our ordinary shares depends in part on the research and reports that securities or industry analysts publish about us or our business. If no or few securities or industry analysts cover us, the trading price for our ordinary shares would likely be negatively impacted. If one or more of the analysts who covers us downgrades our ordinary shares or publishes incorrect or unfavorable research about our business, the price of our ordinary shares would likely decline. If one or more of these analysts ceases coverage of us or fails to publish reports on us regularly, or downgrades our ordinary shares, demand for our ordinary shares could decrease, which could cause the price of our ordinary shares or trading volume to decline.

We will incur increased costs as a result of operating as a public company, and our management will be required to devote substantial time to new compliance initiatives and corporate governance practices.

As a public company, and particularly after we are no longer an “emerging growth company,” we will incur significant legal, accounting and other expenses. The Sarbanes-Oxley Act, the Dodd-Frank Wall Street Reform and Consumer Protection Act, the listing requirements of Nasdaq and other applicable securities rules and regulations impose various requirements on public companies, including establishment and maintenance of effective disclosure and financial controls and corporate governance practices. We expect that we will need to hire additional accounting, finance and other personnel in connection with our becoming, and our efforts to comply with the requirements of being, a public company and our management and other personnel will need to devote a substantial amount of time towards maintaining compliance with these requirements. These requirements will increase our legal and financial compliance costs and will make some activities more time-consuming and costly. For example, we expect that the rules and regulations applicable to us as a public company may make it more difficult and more expensive for us to obtain director and officer liability insurance, which could make it more difficult for us to attract and retain qualified members of our Board. We are currently evaluating these rules and regulations, and cannot predict or estimate the amount of additional costs we may incur or the timing of such costs. These rules and regulations are often subject to varying interpretations, in many cases due to their lack of specificity, and, as a result, their application in practice may evolve over time as new guidance is provided by regulatory and governing bodies. This could result in continuing uncertainty regarding compliance matters and higher costs necessitated by ongoing revisions to disclosure and governance practices.

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If our estimates or judgments relating to our critical accounting policies are based on assumptions that change or prove to be incorrect, our operating results could fall below the expectations of securities analysts and investors, resulting in a decline in the market price of our ordinary shares.

The preparation of financial statements in conformity with IFRS requires management to make estimates and assumptions that affect the amounts reported in our financial statements and accompanying notes. We base our estimates on historical experience and on various other assumptions that we believe to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets, liabilities, equity, revenue and expenses that are not readily apparent from other sources. It is possible that interpretation, industry practice and guidance may evolve over time. If our assumptions change or if actual circumstances differ from our assumptions, our operating results may be adversely affected and could fall below the expectations of securities analysts and investors, resulting in a decline in the market price of our ordinary shares.

Our disclosure controls and procedures may not prevent or detect all errors or acts of fraud.

Upon the closing of this offering, we will become subject to the periodic reporting requirements of the Exchange Act. We designed our disclosure controls and procedures to provide reasonable assurance that information we must disclose in reports we file or submit under the Exchange Act is accumulated and communicated to management, and recorded, processed, summarized and reported within the time periods specified in the rules and forms of the SEC. We believe that any disclosure controls and procedures, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. These inherent limitations include the realities that judgments in decision-making can be faulty, and that breakdowns can occur because of simple error or mistake. Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more people or by an unauthorized override of the controls. Accordingly, because of the inherent limitations in our control system, misstatements due to error or fraud may occur and not be detected.

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CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS

This prospectus contains certain statements that are or may be forward-looking statements with respect to us, our industry and our business that involve substantial risks and uncertainties. All statements other than statements of historical fact contained in this prospectus, including statements regarding our future financial condition, results of operations and/or business achievements, including, without limitation, statements containing the words “believe,” “anticipate,” “expect,” “estimate,” “may,” “could,” “should,” “would,” “will,” “intend” and similar expressions are forward-looking statements. We have based these forward-looking statements largely on our current expectations and projections about future events and trends that we believe may affect our financial condition, results of operations, business strategy and financial needs. Such forward-looking statements involve unknown risks, uncertainties and other factors which may cause our actual results, financial condition, performance or achievements, or industry results, to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements. Factors that might cause such a difference include, but are not limited to:

| • |  | the expected timing, progress or success of our clinical development programs, especially for PHVS416 and PHVS719, which are in early-stage clinical trials;

| • |  | risks associated with the COVID-19 pandemic, which may adversely impact our business, preclinical studies and clinical trials, the timing of regulatory approvals and the value of our ordinary shares;

| • |  | the timing, costs and other limitations involved in obtaining regulatory approval for our product candidates PHVS416 and PHVS719 or any other product candidate that we may develop in the future;

| • |  | our ability to market, commercialize and achieve market acceptance for our product candidates PHVS416 and PHVS719 or any of our other product candidates that we may develop in the future, if approved;

| • |  | our ability to establish commercial capabilities or enter into agreements with third parties to market, sell and distribute our product candidates;

| • |  | our dependence on third parties to perform critical activities related to the research, development and manufacturing of our product candidates;

| • |  | disruptions at the FDA and other government agencies;

| • |  | the expense, time and uncertainty involved in the development and consistent manufacturing and supply of our product candidates, some or all of which may never reach the regulatory approval stage;

| • |  | our ability to raise capital when needed and on acceptable terms;

| • |  | our ability to enter into any new licensing agreements or to maintain any licensing agreements with respect to our product candidates;

| • |  | our reliance on collaboration partners and licensees, whose actions we cannot control;

| • |  | the willingness of private insurers and other payors to provide reimbursement for our products;

| • |  | regulatory developments in the United States, the European Union and other jurisdictions;

| • |  | the outcome and timing of price negotiations with governmental authorities;

| • |  | our ability to compete in the pharmaceutical industry and with competitive generic products;

| • |  | our ability to protect our intellectual property and know-how and operate our business without infringing the intellectual property rights or regulatory exclusivity of others;

| • |  | side effects or adverse events associated with the use of our product candidates;

| • |  | our ability to defend against costly and damaging liability claims resulting from the testing of our product candidates in the clinic or, if, approved, any commercial sales;

| • |  | a loss of any of our key personnel;

| • |  | our estimates of market sizes and anticipated uses of our product candidates;

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| • |  | our estimates of future performance;

| • |  | our estimates regarding anticipated operating losses, future revenues, expenses, capital requirements and our needs for additional financing;

| • |  | our ability to comply with existing or future laws and regulations in a cost-efficient manner;

| • |  | our ability to manage negative consequences from changes in applicable laws and regulations, including tax laws;

| • |  | our ability to successfully remediate the material weaknesses in our internal control over financial reporting and to maintain an effective system of internal control over financial reporting;

| • |  | our expectations regarding the time during which we will be an emerging growth company under the JOBS Act or a foreign private issuer;

| • |  | changes in general market, political and economic conditions; and

| • |  | our expected use of proceeds from this offering.

You should refer to the section of this prospectus titled “Risk Factors” for a discussion of important factors that may cause our actual results to differ materially from those expressed or implied by our forward-looking statements. As a result of these factors, we cannot assure you that the forward-looking statements in this prospectus will prove to be accurate. Furthermore, if our forward-looking statements prove to be inaccurate, the inaccuracy may be material. In light of the significant uncertainties in these forward-looking statements, you should not regard these statements as a representation or warranty by us or any other person that we will achieve our objectives and plans in any specified time frame or at all. We undertake no obligation to publicly update any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law. The Private Securities Litigation Reform Act of 1995 and Section 27A of the Securities Act do not protect any forward-looking statements that we make in connection with this offering.

In addition, statements that “we believe” and other similar statements reflect our belief and opinions on the relevant subject. These statements are based upon information available to us as of the date of this prospectus, and while we believe such information forms a reasonable basis for such statements, such information may be limited or incomplete, and our statements should not be read to indicate that we have conducted an exhaustive inquiry into, or review of, all potentially available relevant information. These statements are inherently uncertain and investors are cautioned not to unduly rely upon these statements.

You should read this prospectus and the documents that we reference in this prospectus and have filed as exhibits to the registration statement, of which this prospectus is a part, completely and with the understanding that our actual future results may be materially different from what we expect. We qualify all of our forward-looking statements by these cautionary statements.

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USE OF PROCEEDS

We estimate that we will receive net proceeds from this offering of approximately $151.3 million (€129.3 million) (or approximately $174.4 million (€149.0 million) if the underwriters exercise in full their overallotment option), after deducting the underwriting discounts and commissions and estimated expenses of the offering that are payable by us.

We currently expect to use the net proceeds from this offering as follows:

| • |  | approximately $50 million (€43 million) to develop our product candidate PHVS416;

| • |  | approximately $61 million (€52 million) to develop our product candidate PHVS719;

| • |  | approximately $12 million (€10 million) for additional clinical development and product discovery; and

| • |  | the remainder for general corporate purposes.

Based on our planned use of the net proceeds of the offering and our current cash and current financial assets, we estimate that such funds will be sufficient to enable us to fund our business through at least the next 24 months. We expect our net proceeds to be more than sufficient to fund the RAPIDe-1 Phase 2 clinical trial of PHVS416, the Phase 2 clinical trial for prophylaxis, the bridging study between our formulation of PHVS719 and PHVS416, and the 14C-PHA121 trial to characterize its absorption, metabolism and excretion. We have based this estimate on assumptions that may prove to be incorrect, and we could use our available capital resources sooner than we currently expect.

Our expected use of the net proceeds from this offering represents our current intentions based upon our present plans and business conditions, which could change in the future as our plans and business conditions evolve. We cannot predict with certainty all of the particular uses for the net proceeds to be received upon the consummation of this offering or the amounts that we will actually spend on the uses set forth above. For example, we may use a portion of the net proceeds to in-license, acquire or invest in complementary technologies, products or assets. However, we have no current plan, commitments or obligations to do so. There is a risk that our development of our product candidates PHVS416 and PHVS719 or any other future clinical development or product discovery program may not result in marketing approval. To the extent that we fail to obtain approval to market our product candidates PHVS416 and PHVS719 or any other clinical development or product discovery program in a timely manner and have to continue clinical trials over a longer period of time, our research and development expenses may further increase. We cannot assure that we will be able to successfully develop and commercialize our product candidates PHVS416 and PHVS719 or any other future clinical development or product discovery program, if approved for marketing, due to risks and uncertainties including those factors described above. See “Risk Factors.” The amounts and timing of our actual expenditures and the extent of clinical development may vary significantly depending on numerous factors, including the progress, timing and completion of our development efforts, the status of and results from our ongoing clinical trials or any preclinical studies or other clinical trials we may commence in the future, the time and costs involved in obtaining regulatory approval for our product candidates PHVS416 and PHVS719 or any other future clinical development or product discovery program, as well as maintaining our existing collaborations and any collaborations that we may enter into with third parties for our product candidates and any unforeseen cash needs. As a result, our Board will have broad discretion in applying the net proceeds of this offering, and investors will be relying on our judgment regarding the application of the net proceeds of this offering.

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DIVIDEND POLICY

We have never declared or paid any dividends on our ordinary shares. We expect to retain all earnings, if any, generated by our operations for the development and growth of our business and do not anticipate paying any dividends to our shareholders in the foreseeable future. Under Dutch law and following the consummation of this offering, we may only pay dividends to the extent our shareholders’ equity (eigen vermogen) exceeds the sum of the paid-up and called-up share capital plus the reserves required to be maintained by Dutch law or by our Articles of Association that will be effective upon consummation of this offering and (if it concerns a distribution of profits) after adoption of the annual accounts by our general meeting from which it appears that such distribution is allowed. Subject to such restrictions, any future determination to pay dividends will be at the discretion of the Board and will depend on a number of factors, including our results of operations, earnings, cash flow, financial condition, future prospects, contractual restrictions, capital investment requirements, restrictions imposed by applicable law and other factors considered relevant by the Board.

Under our Articles of Association that will be effective upon consummation of this offering, if any preferred shares are or have been outstanding, the preferred dividend is first paid out of the profit, if available for distribution, to the holders or former holders, as applicable, of those preferred shares to the extent they are entitled to such distribution under our Articles of Association. Our Board may decide that all or part of our remaining profits shall be added to our reserves. After such reservation, any remaining profit will be at the disposal of the general meeting at the proposal of our Board for distribution on our ordinary shares, subject to the applicable restrictions of Dutch law. Our Board is permitted, subject to certain requirements, to declare interim dividends without the approval of the general meeting. Dividends and other distributions shall be made payable not later than the date determined by the Board. Claims to dividends and other distributions not made within five years from the date that such dividends or distributions became payable will lapse and any such amounts will be considered to have been forfeited to us (verjaring).

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CAPITALIZATION

The table below sets forth our cash and our total capitalization (defined as total debt and shareholders’ equity) as of September 30, 2020:

| • |  | on an actual basis;

| • |  | on an as adjusted basis to give effect to the closing of our Series C financing; and

| • |  | on an as further adjusted basis to also give effect to the conversion of all of our preferred shares into ordinary shares and the sale of ordinary shares by us in the offering (assuming no exercise of the underwriters’ option to purchase additional shares), after deducting the underwriting discounts and commissions and estimated offering expenses.

You should read this table together with our consolidated financial statements and related notes included in this prospectus, as well as the sections of this prospectus titled “Selected Consolidated Financial Data” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and the other financial information included elsewhere in this prospectus.

|  | As of September 30, 2020 |
|  | Actual |  |  | As Adjusted(1) |  |  | As Further Adjusted (1) |
|  | € |  |  | € |  |  | € |
Cash and cash equivalents |  |  | 41,948,476 |  |  |  | 109,131,809 |  |  |  | 238,419,550 |
Total loans and borrowings |  |  | — |  |  |  | — |  |  |  | — |
Share Capital |  |  |  |  |  |  |  |  |  |  |  |
Ordinary shares, €0.01 par value, 4,850,000 shares outstanding on an actual basis and on an as adjusted basis; ordinary shares, €0.12 par value, 31,839,776 shares outstanding on an as further adjusted basis |  |  | 48,500 |  |  |  | 48,500 |  |  |  | 3,820,773 |
Series A preferred shares, €0.01 par value, 5,242,850 shares outstanding on an actual basis and an as adjusted basis; 0 shares outstanding on an as further adjusted basis |  |  | 52,429 |  |  |  | 52,429 |  |  |  | — |
Series B preferred shares, €0.01 par value, 7,650,147 shares outstanding on an actual basis and an as adjusted basis; 0 shares outstanding on an as further adjusted basis |  |  | 76,501 |  |  |  | 76,501 |  |  |  | — |
Series C preferred shares, €0.01 par value, 0 shares outstanding on an actual basis; 5,826,279 shares outstanding on an adjusted basis; 0 shares outstanding on an as further adjusted basis(2) |  |  | — |  |  |  | 58,263 |  |  |  | — |
Share premium |  |  | 70,824,510 |  |  |  | 137,949,580 |  |  |  | 263,652,240 |
Other reserves |  |  | 1,442,563 |  |  |  | 1,442,563 |  |  |  | 1,442,563 |
Currency translation reserve |  |  | 361 |  |  |  | 361 |  |  |  | 361 |
Accumulated loss |  |  | (33,754,742 | ) |  |  | (33,754,742 | ) |  |  | (33,754,742 | )
Total equity |  |  | 38,690,122 |  |  |  | 105,873,455 |  |  |  | 235,161,195 |
Total capitalization |  |  | 38,690,122 |  |  |  | 105,873,455 |  |  |  | 235,161,195 |

(1) | The as adjusted and as further adjusted information is presented for informational purposes only and is not necessarily indicative of what our financial position and results would have been had these transactions actually occurred at such date, nor is it indicative of our future financial position or performance.

(2) | On November 3, 2020, we entered into a subscription agreement, pursuant to which we sold 5,826,279 Series C preferred shares for an aggregate investment amount of approximately $80 million.

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The table and calculations above are based on the number of ordinary shares outstanding as of September 30, 2020, on an as adjusted basis to give effect to the closing of our Series C financing and on an as further adjusted basis to also give effect to the conversion of all of our preferred shares into ordinary shares and the sale of ordinary shares by us in the offering, but exclude:

| • |  | 1,572,295 of our ordinary shares issuable upon the exercise of options outstanding as of January 1, 2021 at a weighted average exercise price of €2.22 per ordinary share;

| • |  | 1,193,474 of our ordinary shares covered by additional option awards available for future issuance under our equity incentive plan as of January 1, 2021;

| • |  | 154,945 RSUs held by Senior Management and other employees as of February 1, 2021; and

| • |  | options to purchase an aggregate of 873,000 ordinary shares pursuant to the IPO Grants.

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DILUTION

If you invest in our ordinary shares, your ownership interest will be diluted to the extent of the difference between the initial public offering price per ordinary share paid by purchasers of our ordinary shares and the as further adjusted net tangible book value per ordinary share immediately after the consummation of this offering. At September 30, 2020, we had an as adjusted net tangible book value of €105.9 ($123.9) million, corresponding to an as adjusted net tangible book value of €4.49 ($5.26) per share. As adjusted net tangible book value per share represents the amount of our total assets less our total liabilities, divided by the total number of our shares outstanding at September 30, 2020 after giving effect to the closing of the Series C financing.

After giving effect to (i) the closing of the Series C financing, (ii) the conversion of all of our preferred shares into ordinary shares and (iii) the sale by us of the 8,270,500 ordinary shares offered by us in the offering, after deducting the underwriting discounts and commissions and estimated offering expenses payable by us, our as further adjusted net tangible book value at September 30, 2020 would have been approximately €235.2 ($275.3) million, representing €7.39 ($8.65) per share. This represents an immediate increase in as adjusted net tangible book value of €2.89 ($3.39) per share to existing shareholders and an immediate dilution in as further adjusted net tangible book value of €9.70 ($11.35) per share to new investors purchasing ordinary shares in this offering. Dilution for this purpose represents the difference between the price per ordinary share paid by these purchasers and the as further adjusted net tangible book value per ordinary share immediately after the consummation of the offering.

The following table illustrates this dilution to new investors purchasing ordinary shares in the offering:

|  | € |  |  | $ |
Initial public offering price per ordinary share |  |  | 17.09 |  |  |  | 20.00 |
As adjusted net tangible book value per ordinary share at September 30, 2020 |  |  | 4.49 |  |  |  | 5.26 |
Increase in as further adjusted net tangible book value per ordinary share attributable to new investors |  |  | 2.89 |  |  |  | 3.39 |
As further adjusted net tangible book value per ordinary share after the offering |  |  | 7.39 |  |  |  | 8.65 |
Dilution per ordinary share to new investors |  |  | 9.70 |  |  |  | 11.35 |
Percentage of dilution in net tangible book value per ordinary share for new investor |  |  | 56.8 | % |  |  | 56.8 | %

If the underwriters exercise their overallotment option in full, the as further adjusted net tangible book value per ordinary share after the offering would be €7.70 ($9.02) per ordinary share, the increase in the as adjusted net tangible book value per ordinary share would be €3.21 ($3.76) per ordinary share and the dilution to new investors purchasing ordinary share in this offering would be €9.38 ($10.98) per ordinary share.

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In addition, if the underwriters exercise their overallotment option in full, the number of shares held by the existing shareholders after the offering would be reduced to 71.2% of the total number of ordinary shares outstanding after the offering, and the number of ordinary shares held by new investors participating in the offering would increase to 9,511,075, or 28.8% of the total number of ordinary shares outstanding after the offering.

The following table sets forth, on an as further adjusted basis as of September 30, 2020, giving effect to (i) the closing of the Series C financing, (ii) the conversion of all of our preferred shares into ordinary shares and (iii) the sale by us of the 8,270,500 ordinary shares offered by us in the offering, the consideration paid to us in cash for shares purchased from us by our existing shareholders and by new investors for ordinary shares purchased in the offering, before deducting underwriting discounts and commissions and estimated offering expenses payable by us:

|  | Ordinary shares |  |  | Total consideration |  |  | Average price per ordinary share |
|  | Amount |  |  | Percent |  |  | Amount |  |  | Percent |
Existing shareholders |  |  | 23,569,276 |  |  |  | 74.02 | % |  | € | 140,202,137 |  |  |  | 49.8 | % |  | € | 5.95 |
New investors |  |  | 8,270,500 |  |  |  | 25.98 | % |  | € | 141,315,677 |  |  |  | 50.2 | % |  | € | 17.09 |
Total |  |  | 31,839,776 |  |  |  | 100.0 | % |  | € | 281,517,814 |  |  |  | 100.0 | % |  | € | 8.84 |

The tables and calculations above are based on the number of ordinary shares outstanding as of September 30, 2020, on an as adjusted basis to give effect to the closing of our Series C financing and on an as further adjusted basis to also give effect to the conversion of all of our preferred shares into ordinary shares and the sale of ordinary shares by us in the offering, but exclude:

| • |  | 1,572,295 of our ordinary shares issuable upon the exercise of options outstanding as of January 1, 2021 at an exercise price of €2.22 per ordinary share;

| • |  | 1,193,474 of our ordinary shares covered by additional option awards available for future issuance under our equity incentive plan as of January 1, 2021;

| • |  | 154,945 RSUs held by Senior Management and other employees as of February 1, 2021; and

| • |  | options to purchase an aggregate of 873,000 ordinary shares pursuant to the IPO Grants.

To the extent that outstanding options are exercised, you will experience further dilution. In addition, we may choose to raise additional capital due to market conditions or strategic considerations even if we believe we have sufficient funds for our current or future operating plans. To the extent that additional capital is raised through the sale of equity or convertible debt securities, the issuance of such securities may result in further dilution to our shareholders.

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SELECTED CONSOLIDATED FINANCIAL DATA

You should read the following selected consolidated financial data in conjunction with our consolidated financial statements and related notes included in this prospectus and the sections of this prospectus titled “Management’s Discussion and Analysis of Financial Condition and Results of Operations.” Our historical results for any prior period are not necessarily indicative of results to be expected in any future period.

The consolidated statement of profit or loss and other comprehensive income (loss) for the years ended December 31, 2019 and 2018 and the statements of financial position data as of December 31, 2019 and 2018 are derived from our audited consolidated financial statements and the related notes thereto included elsewhere in this prospectus. The consolidated statement of profit or loss and other comprehensive income (loss) for the nine months ended September 30, 2020 and 2019 and the statement of financial position data as of September 30, 2020 are derived from our unaudited condensed consolidated financial statements and the related notes thereto included elsewhere in this prospectus. We have prepared the unaudited condensed consolidated financial statements on the same basis as the audited consolidated financial statements, and the unaudited financial data include, in our opinion, all adjustments, consisting only of normal recurring adjustments that we consider necessary for a fair statement of our consolidated financial position and results of operations for these periods. Our historical results are not necessarily indicative of results expected for future periods and our operating results for the nine months ended September 30, 2020 are not necessarily indicative of the results that may be expected for the entire year ending December 31, 2020.

We maintain our books and records in euros, and we prepare our financial statements in accordance with IFRS, as issued by the IASB.

Consolidated Statements of Profit or Loss and Other Comprehensive Income (Loss)

|  | For the Nine Months Ended September 30, |  |  | For the Year Ended December 31, |
|  | 2020 |  |  | 2019 |  |  | 2019 |  |  | 2018 |
|  | € |  |  | € |  |  | € |  |  | € |
Research and development expenses |  |  | (11,797,986 | ) |  |  | (3,154,877 | ) |  |  | (5,684,562 | ) |  |  | (3,645,413 | )
General and administrative expenses |  |  | (3,447,208 | ) |  |  | (1,409,972 | ) |  |  | (2,325,719 | ) |  |  | (668,121 | )
Total operating expenses |  |  | (15,245,194 | ) |  |  | (4,564,849 | ) |  |  | (8,010,281 | ) |  |  | (4,313,534 | )
Net foreign exchange loss |  |  | (176,602 | ) |  |  | (3,927 | ) |  |  | (16,881 | ) |  |  | (380 | )
Loss before income tax |  |  | (15,421,796 | ) |  |  | (4,568,776 | ) |  |  | (8,027,162 | ) |  |  | (4,313,914 | )
Income tax expense |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Total comprehensive loss for the year, net of tax |  |  | (15,421,796 | ) |  |  | (4,568,776 | ) |  |  | (8,027,162 | ) |  |  | (4,313,914 | )
Loss attributable to: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity holders of the Company |  |  | (15,421,796 | ) |  |  | (4,568,776 | ) |  |  | (8,027,162 | ) |  |  | (4,313,914 | )
Total comprehensive loss attributable to: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity holders of the Company |  |  | (15,421,796 | ) |  |  | (4,568,776 | ) |  |  | (8,027,162 | ) |  |  | (4,313,914 | )
Loss per share attributable to equity holders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic and diluted loss per share(1)(2) |  |  | (3.18 | ) |  |  | (0.94 | ) |  |  | (1.66 | ) |  |  | (0.89 | )

(1) | Basic loss per share is calculated by dividing the loss attributable to equity holders of the Company by the weighted average number of issued and outstanding ordinary shares during the period.

(2) | Diluted loss per share is calculated by adjusting the weighted average number of ordinary shares outstanding to assume conversion of all dilutive potential ordinary shares. Because the Company is loss making, all of its potential ordinary shares had an antidilutive effect, if converted, and thus have been excluded from the computation of its diluted loss per share.

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Consolidated Statements of Financial Position

|  | As of September 30, |  |  | As of December 31, |
|  | 2020 |  |  | 2019 |  |  | 2018 |
|  | € |  |  | € |  |  | € |
Assets |  |  |  |  |  |  |  |  |  |  |  |
Non-current assets |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment |  |  | 43,766 |  |  |  | 12,927 |  |  |  | — |
Current assets |  |  |  |  |  |  |  |  |  |  |  |
Receivables |  |  | 1,062,009 |  |  |  | 258,379 |  |  |  | 49,044 |
Cash and cash equivalents |  |  | 41,948,476 |  |  |  | 20,326,372 |  |  |  | 5,385,333 |
Total assets |  |  | 43,054,251 |  |  |  | 20,597,678 |  |  |  | 5,434,377 |
Equity and liabilities |  |  |  |  |  |  |  |  |  |  |  |
Share capital(1) |  |  | 177,430 |  |  |  | 130,962 |  |  |  | 100,928 |
Share premium |  |  | 70,824,510 |  |  |  | 36,624,697 |  |  |  | 15,023,205 |
Other reserves |  |  | 1,442,563 |  |  |  | 392,139 |  |  |  | 275,992 |
Currency translation reserve |  |  | 361 |  |  |  | — |  |  |  | — |
Accumulated loss |  |  | (33,754,742 | ) |  |  | (18,474,250 | ) |  |  | (10,447,088 | )
Total equity |  |  | 38,690,122 |  |  |  | 18,673,548 |  |  |  | 4,953,037 |
Current liabilities |  |  |  |  |  |  |  |  |  |  |  |
Trade and other payables |  |  | 2,819,594 |  |  |  | 517,771 |  |  |  | 246,983 |
Accrued liabilities |  |  | 1,544,535 |  |  |  | 1,406,359 |  |  |  | 234,357 |
Total liabilities |  |  | 4,364,129 |  |  |  | 1,924,130 |  |  |  | 481,340 |
Total equity and liabilities |  |  | 43,054,251 |  |  |  | 20,597,678 |  |  |  | 5,434,377 |

(1) | The Company had 5,242,850 Series A preferred shares, 7,650,147 Series B preferred shares and 4,850,000 ordinary shares outstanding as of September 30, 2020, 5,242,850 Series A preferred shares, 3,003,391 Series B preferred shares and 4,850,000 ordinary shares outstanding as of December 31, 2019 and 5,242,850 Series A preferred shares and 4,850,000 ordinary shares outstanding as of December 31, 2018.

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EXCHANGE RATE INFORMATION

Our business is primarily conducted in the European Union, and we maintain our books and records in euros. We have presented results of operations in euros. In this prospectus, transactions from U.S. dollars to euros were made at the rate of €1.00 to $1.1705, the average exchange rate quoted as of September 30, 2020 by the European Central Bank.

The following table presents information on the exchange rates between the euro and the U.S. dollar for the periods indicated:

|  | Period-end |  |  | Average for period |  |  | Low |  |  | High |
|  | (U.S. dollar per €) |
Year Ended December 31: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2018 |  |  | 1.145 |  |  |  | 1.1811 |  |  |  | 1.1261 |  |  |  | 1.2493 |
2019 |  |  | 1.1234 |  |  |  | 1.1196 |  |  |  | 1.0889 |  |  |  | 1.1535 |
2020 |  |  | 1.2271 |  |  |  | 1.1422 |  |  |  | 1.0707 |  |  |  | 1.2281 |
Month Ended: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
January 2021 |  |  | 1.2136 |  |  |  | 1.2171 |  |  |  | 1.2064 |  |  |  | 1.2338 |
February 2021 (through February 4, 2021) |  |  | 1.1996 |  |  |  | 1.2035 |  |  |  | 1.1996 |  |  |  | 1.2084 |

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MANAGEMENT’S DISCUSSION AND ANALYSIS

OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

You should read the following discussion of our financial condition and results of operations in conjunction with the financial statements and the notes included elsewhere in this prospectus. The following discussion contains forward-looking statements that involve certain risks and uncertainties. Our actual results could differ materially from those discussed in these statements. Factors that could cause or contribute to these differences include those discussed below and elsewhere in this prospectus, particularly under the “Risk Factors” and “Cautionary Statement Regarding Forward-Looking Statements” sections.

Our audited consolidated financial statements are included elsewhere in this prospectus. These financial statements are prepared pursuant to IFRS as issued by IASB. As permitted by the rules of the SEC for foreign private issuers, we do not reconcile our financial statements to U.S. GAAP.

Overview

We are a clinical-stage biopharmaceutical company focused on the development and commercialization of innovative therapies for rare diseases with significant unmet need, initially focused on angioedema and other bradykinin-mediated diseases. Our first molecule, PHA121, is a novel, small molecule bradykinin B2-receptor antagonist for the treatment of hereditary angioedema, or HAE. Bradykinin-B2-receptor inhibition is a clinically validated mechanism for the treatment of HAE, as demonstrated by icatibant, which is a bradykinin B2-receptor antagonist approved in Europe in 2008 and in the United States in 2011 (as FIRAZYR). We designed PHA121 to improve upon the therapeutic profile of existing therapies and, through oral delivery, to provide patients with quality of life and convenience that is superior to current standard-of-care HAE treatments, which are injectables. We believe PHA121 has the potential to provide a safe, effective and convenient option for both acute and prophylactic treatments of HAE, in the form of our PHVS416 on-demand rapid exposure product candidate, and for prophylaxis of HAE, in the form of our PHVS719 small daily dose extended-release product candidate. We believe that our product candidates may address a broader range of angioedema attacks than other available treatments since PHA121 blocks the actual signal that leads to angioedema (the interaction of bradykinin, or BK, with the bradykinin B2 receptor), rather than an upstream signal. By blocking the action of bradykinin, we can prevent its aberrant signaling regardless of the pathway that generates it. In our Phase 1 completed trials to-date, we have observed that PHA121 was well tolerated and orally bioavailable. We also have successfully demonstrated proof-of-mechanism through a clinical pharmacodynamics, or PD, assessment with the bradykinin challenge, which had been utilized as a validated surrogate assessment for dose selection in the icatibant development program. The data also allowed us to compare the projected therapeutic performance of PHA121 with that of icatibant, but we do not yet have data from the PHA121 Phase 2 study. We plan to efficiently progress PHA121 through clinical development for on-demand and prophylactic use with our on-demand product candidate, PHVS416, and extended release product candidate, PHVS719, respectively. We anticipate commencing our RAPIDe-1 Phase 2 clinical trial of PHVS416 in 2021 and have Phase 2 data for the acute treatment of patients with HAE attacks in 2022. We are also planning to commence a Phase 2 clinical trial for prophylaxis in 2021 using twice-daily dosing of the PHVS416 soft capsules. Our primary objective with this trial is to assess the safety profile of PHVS416 dose regimens for prophylactic treatments in HAE patients. We also expect to conduct a bridging study between our formulation of PHVS719 and PHVS416 in a Phase 1 clinical trial starting in 2021.

The COVID-19 outbreak has spread globally and severely restricted the level of economic activity around the world. In response to the COVID-19 outbreak, the governments of many countries, states, cities and other geographic regions have taken preventative or protective actions, such as imposing restrictions on travel and business operations and advising or requiring individuals to limit or forego their time outside of their homes.

We are monitoring developments surrounding the COVID-19 pandemic and have taken steps to identify and mitigate the adverse effects and risks to the Company as a result of the pandemic. As a result, we have modified our business practices, including implementing work from home arrangements for employees able to perform their duties remotely, restricting nonessential travel, and practicing safe social distancing in our operations. We expect to continue to take actions as may be required or recommended by government authorities or in the best

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interests of our employees and business partners. While the impact of COVID-19 on the Company’s operations and financial performance is limited, the extent to which COVID-19 may impact our financial condition or results of operations is uncertain. For instance, the ongoing spread of COVID-19 may continue to interrupt, or delay, clinical trial activities, regulatory reviews, manufacturing activities and supply chain. For example, we experienced an approximate two-month delay in starting the enrollment of our Phase 1 multiple ascending dose study of PHA121 in healthy volunteers as a result of COVID-19. In addition, even with our distributed operations and our observation of social distancing measures, there remains the possibility that key personnel may become ill or are otherwise unable to work, which could adversely affect our operations.

Furthermore, the spread of the virus may affect the operations of key governmental agencies, such as the FDA, which may delay the development of our product candidates. The spread of COVID-19 may also result in the inability of our suppliers to deliver components or raw materials, and the inability of our CDMOs to provide supplies of our product candidates for our planned clinical trials, on a timely basis or at all. Further, COVID-19 may impact the ability of our CROs, including non-clinical CROs, to provide services to support our clinical program.

The COVID-19 pandemic remains a rapidly evolving situation and we do not yet know the full extent of its potential impact on our business operations. However, we are making efforts to limit the financial impact of COVID-19 going forward.

Financial Operations Overview

Revenues

We did not record any revenues during the period covered by the historical financial information included in this prospectus. We do not expect to derive any revenues before we are able to commercialize our first product.

Research and Development Expenses

We are focused on the clinical development of PHA121. Since our inception, we have devoted substantially all of our resources to research and development efforts relating to the development of PHA121 and our product candidates PHVS416 and PHVS719. We expect that we will continue to incur significant research and development expenses as we seek to complete the clinical development of, and achieve regulatory approval for, our product candidates PHVS416 and PHVS719, and in connection with discovery and development of any additional product candidates.

Research and development expenses consist of the following:

| • |  | employee benefits expenses, which includes salaries, pensions, share-based compensation expenses, bonus plans and other related costs for research and development staff;

| • |  | preclinical expenses, which include costs of our outsourced discovery, preclinical and nonclinical development studies;

| • |  | clinical expenses, which includes costs of conducting and managing our sponsored clinical trials, including clinical investigator cost, costs of clinical sites, and costs for CROs assisting with our clinical development programs;

| • |  | manufacturing expenses, which include costs related to manufacturing of active pharmaceutical ingredients and manufacturing of the products used in our clinical trials and research and development activities;

| • |  | costs related to regulatory activities, including collecting data, preparing and submitting filings, communicating with regulatory authorities and reviewing the design and conduct of clinical trials for compliance with applicable requirements;

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| • |  | costs in connection with investigator-sponsored clinical trials and evaluations;

| • |  | advisers’ fees, including discovery, nonclinical, clinical, chemistry, manufacturing, and controls -related and other consulting services;

| • |  | intellectual property costs, which includes costs associated with obtaining and maintaining patents and other intellectual property; and

| • |  | license costs.

We expect that our total research and development expense in 2021 will be in the range of €50 to €60 million as we continue to focus on the development of our product candidates PHVS416 and PHVS719, as well as explore potential expansion programs. We anticipate that research and development expenses will continue to increase as we continue to progress PHVS416 and PHVS719 through clinical development.

There is a risk that any clinical development or product discovery program may not result in commercial approval. To the extent that we fail to obtain approval to commercialize our product candidates in a timely manner, we would need to continue to conduct clinical trials over a longer period of time, and we anticipate that our research and development expenses may further increase.

Clinical development timelines and associated costs may vary significantly and the successful development of our product candidates is highly uncertain. At this time, we cannot reasonably estimate the nature, timing and estimated costs of the efforts, including patient recruitment and selection that will be necessary to complete the development of, or the period, if any, in which material net cash inflows may commence from, our product candidates. Moreover, we cannot assure that we will be able to successfully develop or commercialize our product candidates, if approved for marketing. This is due to numerous risks and uncertainties associated with developing drugs. See “Risk Factors.”

Selling and Distribution Expenses

Historically, we have not incurred any selling and distribution expenses. If our product candidates are approved for registration and marketing, we anticipate incurring substantial selling and distribution expenses in future periods in order to establish an infrastructure for marketing and distribution, obtain supplies of active pharmaceutical ingredients, and manufacture commercial quantities of our product candidates.

General and Administrative Expenses

We anticipate that we will continue to incur significant general and administrative expenses as we advance our research and development portfolio. General and administrative expenses consist of the following:

| • |  | employee benefits, including salaries, pensions, share-based compensation expenses, bonus plans and other related costs for staff and independent contractors in executive and operational functions;

| • |  | auditors’ and advisers’ fees, including accounting, tax, legal and other consulting services; and

| • |  | rental expenses, facilities and IT expenses and other general expenses relating to our operations.

We anticipate that the continuing development of our business and the expense of maintaining directors’ and officers’ liability insurance will contribute to a future increase in general and administrative expenses. We also expect that general and administrative expenses will increase in the future as we incur additional costs associated with being a public company in the United States.

Share-Based Compensation Expenses

In 2016, we implemented an Equity Incentive Plan, or the Plan, in order to advance the interests of our shareholders by enhancing our ability to attract, retain and motivate persons who are expected to make important

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contributions to us and by providing such persons with performance-based incentives that are intended to better align the interests of such persons with those of our shareholders. The fair value of these instruments will be recognized as personnel expenses in either research and development and expenses or general and administrative expense.

Comparison of the nine months ended September 30, 2020 and 2019

The following table summarizes our loss for the periods indicated:

|  | For the nine months ended September 30 |  |  |  |  |  |  |
|  | 2020 |  |  | 2019 |  |  | Change |  |  | % |
|  | (in €) |  |  |  |
Research and development expenses |  |  | (11,797,986 | ) |  |  | (3,154,877 | ) |  |  | (8,643,109 | ) |  |  | 274 | %
General and administrative expenses |  |  | (3,447,208 | ) |  |  | (1,409,972 | ) |  |  | (2,037,236 | ) |  |  | 144 | %
Total operating expenses |  |  | (15,245,194 | ) |  |  | (4,564,849 | ) |  |  | (10,680,345 | ) |  |  | 234 | %
Net foreign exchange loss |  |  | (176,602 | ) |  |  | (3,927 | ) |  |  | (172,675 | ) |  |  | n.m. |
Loss before income tax |  |  | (15,421,796 | ) |  |  | (4,568,776 | ) |  |  | (10,853,020 | ) |  |  | 238 | %
Income taxes |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Loss for the period |  |  | (15,421,796 | ) |  |  | (4,568,776 | ) |  |  | (10,853,020 | ) |  |  | 238 | %

Research and Development Expenses

|  | For the nine months ended September 30 |  |  |  |  |  |  |
|  | 2020 |  |  | 2019 |  |  | Change |  |  | % |
|  | (in €) |  |  |  |
Personnel expenses |  |  | (1,677,630 | ) |  |  | (69,417 | ) |  |  | (1,608,213 | ) |  |  | 2,317 | %
Clinical expenses |  |  | (5,293,514 | ) |  |  | (886,152 | ) |  |  | (4,407,362 | ) |  |  | 497 | %
Preclinical expenses |  |  | (2,065,658 | ) |  |  | (1,056,826 | ) |  |  | (1,008,832 | ) |  |  | 95 | %
Manufacturing costs |  |  | (2,624,638 | ) |  |  | (830,088 | ) |  |  | (1,794,550 | ) |  |  | 216 | %
License costs |  |  | — |  |  |  | (300,000 | ) |  |  | 300,000 |  |  |  | n.m. |
Intellectual property costs |  |  | (136,546 | ) |  |  | (12,394 | ) |  |  | (124,152 | ) |  |  | 1,002 | %
Total research and development expenses |  |  | (11,797,986 | ) |  |  | (3,154,877 | ) |  |  | (8,643,109 | ) |  |  | 274 | %

Research and development expenses increased by €8,643,109 to €11,797,986 in the nine months ended September 30, 2020, or 274% from €3,154,877 for the nine months ended September 30, 2019. The increase in research and development expenses was due primarily to the expansion of the Phase 1 clinical program in 2020 and the progression of preclinical studies to prepare for the Phase 2 clinical program in 2020. The cost of manufacturing of PHA121 for preclinical studies and expanded formulation development work were also major cost drivers in 2020. In 2019, a milestone payment of €300,000 was paid to AnalytiCon upon commencement of Phase 1 development. In personnel expenses, an amount of €817,488 for 2020 and €69,417 for 2019 is related to the share-based payments arrangements.

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General and Administrative Expenses

|  | For the nine months ended September 30 |  |  |  |  |  |  |
|  | 2020 |  |  | 2019 |  |  | Change |  |  | % |
|  | (in €) |  |  |  |
Personnel expenses |  |  | (708,645 | ) |  |  | (12,117 | ) |  |  | (696,528 | ) |  |  | 5748 | %
Consulting fees |  |  | (732,915 | ) |  |  | (796,447 | ) |  |  | (63,532 | ) |  |  | (8 | )%
Professional fees |  |  | (656,798 | ) |  |  | (175,937 | ) |  |  | (480,861 | ) |  |  | 273 | %
Accounting, tax and auditing fees |  |  | (778,696 | ) |  |  | (134,606 | ) |  |  | (644,090 | ) |  |  | 479 | %
Facilities, communication & office expenses |  |  | (419,879 | ) |  |  | (78,100 | ) |  |  | (341,779 | ) |  |  | 438 | %
Travel expenses |  |  | (25,161 | ) |  |  | (143,232 | ) |  |  | (118,071 | ) |  |  | (82 | )%
Other expenses |  |  | (125,114 | ) |  |  | (69,533 | ) |  |  | (55,581 | ) |  |  | 80 | %
General and administrative expenses |  |  | (3,447,208 | ) |  |  | (1,409,972 | ) |  |  | (2,037,236 | ) |  |  | 144 | %

General and administrative expenses increased by €2,037,236 to €3,447,208 in the nine months ended September 30, 2020, or 144% from €1,409,972 for the nine months ended September 30, 2019. The increase in general and administrative expenses was mainly driven by the growth of the Group and the associated engagement of consultants and service providers as well as the hiring of additional employees to support the Group’s activities and to fulfill legal, tax and reporting compliance requirements. In addition, the Group’s preparation for an initial public offering led to an increase in legal, accounting and reporting expenses. In personnel expenses, an amount of €232,936 for 2020 and €12,117 for 2019 is related to the share-based payments arrangements.

Net Foreign Exchange Loss

Our net foreign exchange loss increased by €172,675 from €3,927 for the nine months ended September 30, 2019 to €176,602 for the nine months ended September 30, 2020. This increase is due to the translation of the Group’s foreign operations into the Group’s reporting currency and the increase in the services rendered from parties invoicing in a currency different to the Group reporting currency.

Income Taxes

We have a history of losses. We had accumulated tax losses of €19.9 million with respect to corporate tax as of September 30, 2020. We expect to continue incurring losses in the near future as we continue to invest in the development of our product candidates. Consequently, we do not have any deferred tax asset on our statement of financial position. The total unrecognized deferred tax assets from temporary differences equaled €3.2 million for the nine months ended September 30, 2020.

Comparison of the years ended December 31, 2019 and 2018

The following table summarizes our loss for the periods indicated:

|  | For the year ended December 31 |  |  |  |  |  |  |
|  | 2019 |  |  | 2018 |  |  | Change |  |  | % |
|  | (in €) |  |  |  |
Research and development expenses |  |  | (5,684,562 | ) |  |  | (3,645,413 | ) |  |  | (2,039,149 | ) |  |  | 56 | %
General and administrative expenses |  |  | (2,325,719 | ) |  |  | (668,121 | ) |  |  | (1,657,598 | ) |  |  | 248 | %
Total operating expenses |  |  | (8,010,281 | ) |  |  | (4,313,534 | ) |  |  | (3,696,747 | ) |  |  | 86 | %
Net foreign exchange loss |  |  | (16,881 | ) |  |  | (380 | ) |  |  | (16,501 | ) |  |  | n.m |
Loss before income tax |  |  | (8,027,162 | ) |  |  | (4,313,914 | ) |  |  | (3,713,248 | ) |  |  | 86 | %
Income taxes |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Loss for the period |  |  | (8,027,162 | ) |  |  | (4,313,914 | ) |  |  | (3,713,248 | ) |  |  | 86 | %

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Research and Development Expenses

|  | For the year ended December 31 |  |  |  |  |  |  |
|  | 2019 |  |  | 2018 |  |  | Change |  |  | % |
|  | (in €) |  |  |  |
Personnel expenses |  |  | (131,544 | ) |  |  | (99,946 | ) |  |  | (31,598 | ) |  |  | 32 | %
Clinical expenses |  |  | (2,009,892 | ) |  |  | (205,873 | ) |  |  | (1,804,019 | ) |  |  | 876 | %
Preclinical expenses |  |  | (1,850,444 | ) |  |  | (2,449,046 | ) |  |  | 598,602 |  |  |  | (24 | )%
Manufacturing costs |  |  | (1,379,590 | ) |  |  | (870,933 | ) |  |  | (508,657 | ) |  |  | 58 | %
License costs |  |  | (300,000 | ) |  |  | — |  |  |  | (300,000 | ) |  |  | n.m. |
Intellectual property costs |  |  | (13,092 | ) |  |  | (19,615 | ) |  |  | 6,523 |  |  |  | (33 | )%
Total research and development expenses |  |  | (5,684,562 | ) |  |  | (3,645,413 | ) |  |  | (2,039,149 | ) |  |  | 56 | %

Research and development expenses increased by €2,039,149 in 2019, or 56% from €3,645,413 for the year ended December 31, 2018 to €5,684,562 for the year ended December 31, 2019. The increase in research and development expenses in 2019 compared to 2018 was due to the progression of PHA121 into clinical development, with a Phase 1 clinical trial initiated in 2019, and the commencement of preclinical studies to prepare for the Phase 2 clinical program that is anticipated to commence in 2021. The cost of manufacturing PHA121 for preclinical studies and clinical trials was also a major cost driver in 2019. A milestone payment of €300,000 was also paid to AnalytiCon upon commencement of Phase 1 development.

General and Administrative Expenses

|  | For the year ended December 31 |  |  |  |  |  |  |
|  | 2019 |  |  | 2018 |  |  | Change |  |  | % |
|  | (in €) |  |  |  |
Personnel expenses |  |  | (49,601 | ) |  |  | (799 | ) |  |  | (48,802 | ) |  |  | n.m. |
Consulting fees |  |  | (990,730 | ) |  |  | (333,160 | ) |  |  | (657,570 | ) |  |  | 197 | %
Professional fees |  |  | (495,326 | ) |  |  | (62,958 | ) |  |  | (432,368 | ) |  |  | 687 | %
Accounting and auditing fees |  |  | (300,841 | ) |  |  | (111,852 | ) |  |  | (188,989 | ) |  |  | 169 | %
Travel expenses |  |  | (236,904 | ) |  |  | (84,970 | ) |  |  | (151,934 | ) |  |  | 179 | %
Facilities, communication & office expenses |  |  | (167,062 | ) |  |  | (47,536 | ) |  |  | (119,526 | ) |  |  | 251 | %
Other expenses |  |  | (85,255 | ) |  |  | (26,846 | ) |  |  | (58,409 | ) |  |  | 218 | %
General and administrative expenses |  |  | (2,325,719 | ) |  |  | (668,121 | ) |  |  | (1,657,598 | ) |  |  | 248 | %

General and administrative expenses increased by €1,657,598, from €668,121 for the year ended December 31, 2018 to €2,325,719 for the year ended December 31, 2019. The increase in general and administrative expenses was driven by a variety of factors primarily the growth of the Company, in particular the increase in additional consulting personnel, recruitment, accounting and legal fees, investor relations expenses related to financing activities, travel expenses and increased office space to accommodate our growth.

Net Foreign Exchange Loss

Our net foreign exchange loss increased by €16,501 from €380 for the year ended December 31, 2018 to €16,881 for the year ended December 31, 2019. This increase is due to increased foreign exchange losses as a result of an increase in transactions in foreign currencies due to the Company’s activities in various jurisdictions.

Income Taxes

We have a history of losses. We had accumulated tax losses of €5.9 million with respect to corporate tax as of December 31, 2019. We had accumulated tax losses of €2.7 million with respect to corporate tax as of

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December 31, 2018. We expect to continue incurring losses in the near future as we continue to invest in the development of our product candidates. Consequently, we do not have any deferred tax asset on our statement of financial position. The total unrecognized deferred tax assets from temporary differences equaled €2.9 million for the year ended December 31, 2019 compared to €1.6 million for the year ended December 31, 2018.

Liquidity and Capital Resources

Since inception, we have incurred significant operating losses. We incurred losses of €4,313,914 during the year ended December 31, 2018 and €8,027,162 during the year ended December 31, 2019. For the nine months ended September 30, 2020, we incurred losses of €15,421,796. Since inception, we have not generated any revenues or net cash flows from sales. We will not receive any revenues or net cash flows from sales until we successful develop a product candidate obtain regulatory approval and successfully commercialize it. There is no assurance that we will be able to do so.

To date, we have relied solely on the issuance of equity securities to finance our operations and internal growth. From inception through September 30, 2020, we have raised the following capital:

| • |  | issuance of 4,850,000 Common shares raising €225,000;

| • |  | issuance of 5,242,850 Series A preferred shares raising €14,899,133 (net of transaction costs);

| • |  | issuance of 3,003,391 Series B-1 preferred shares raising €21,631,526 (net of transaction costs); and

| • |  | issuance of 4,646,756 Series B-2 preferred shares raising €34,246,281 (net of transaction costs).

In addition, in November 2020, we issued 5,826,279 Series C preferred shares raising approximately $80 million.

As of September 30, 2020 we held cash and cash equivalents of €41,948,476. We expect that the net proceeds from this offering, together with our existing cash and cash equivalents, will enable us to fund our operating expenses and capital expenditure requirements for the next 24 months.

We have based our estimate on assumptions that may prove to be wrong, and we may use our available capital resources sooner than we currently expect. For example, we may require additional capital resources due to underestimation of the nature, timing and estimated costs of the efforts that will be necessary to complete the development of our product candidates. We may also need to raise additional funds more quickly if we choose to expand our development activities, our portfolio or if we consider acquisitions. Factors that could influence our future capital requirements and the timing thereof include:

| • |  | the progress and cost of our discovery, preclinical and nonclinical development;

| • |  | the progress and cost of our clinical trials, including payments of patient and clinical site cost, clinical investigator cost and payments to CROs that are assisting with our sponsored clinical trials, and other research and development activities;

| • |  | the cost and timing of obtaining regulatory approval to commence further clinical trials;

| • |  | the costs associated with any future investigator-sponsored clinical trials;

| • |  | the cost of filing, prosecuting, defending and enforcing any patent applications, claims, patents and other intellectual property rights;

| • |  | the cost and timing of obtaining sufficient quantities of our product candidates for clinical trials by establishing our contracted and/or own production capacities;

| • |  | the terms and timing of any collaborative, licensing and other arrangements that we may establish;

| • |  | the costs of any delays caused by the COVID-19 pandemic and associated restrictions;

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| • |  | the cost of preparing for launch and commercialization of our product candidates; and

| • |  | the cost of operating as a public company in the United States.

Until such time, if ever, as we can generate substantial product revenues, we expect to finance our cash needs through a combination of public or private equity offerings, debt financings, convertible loans, warrants, collaborations or other means. We may consider raising additional capital to take advantage of favorable market conditions or other strategic considerations even if we have sufficient funds for planned operations.

To the extent that we raise additional funds by issuing and selling equity or equity-linked securities, shareholders will experience dilution. Debt financings, if available, may subject us to financial and other restrictive covenants that limit our ability to engage in activities that we may believe to be in our long-term best interests. Additional financing may not be available on acceptable terms, if at all. Capital may become difficult or impossible to obtain due to poor market or other conditions outside of our control (including the COVID-19 pandemic). If we are unable to raise additional funds when needed, we may be required to delay, reduce, or terminate some or all of our development programs and clinical trials. We may also be required to sell or license to others technologies or our clinical product candidates that we would prefer to develop and commercialize ourselves.

Cash Flows

Comparison for the nine months ended September 30, 2020 and September 20, 2019

The following table sets forth our primary sources and uses of our cash and cash equivalents for each of the periods set forth below:

|  | For the nine months ended September 30, |  |  |  |  |  |  |
|  | 2020 |  |  | 2019 |  |  | Change |  |  | % |
|  | (in €) |  |  |  |
Net cash flows used in operating activities |  |  | (12,588,520 | ) |  |  | (3,529,943 | ) |  |  | (9,058,577 | ) |  |  | 257 | %
Net cash flows used in investing activities |  |  | (35,657 | ) |  |  | (4,297 | ) |  |  | (31,360 | ) |  |  | 730 | %
Net cash flows provided by financing activities |  |  | 34,246,281 |  |  |  | 22,297,707 |  |  |  | 11,948,574 |  |  |  | 54 | %
Net increase in cash and cash equivalents |  |  | 21,622,104 |  |  |  | 18,763,467 |  |  |  | 2,858,637 |  |  |  | 15 | %
Cash and cash equivalents at beginning of period |  |  | 20,326,372 |  |  |  | 5,385,333 |  |  |  | 14,941,039 |  |  |  | 277 | %
Cash and cash equivalents at end of period |  |  | 41,948,476 |  |  |  | 24,148,800 |  |  |  | 17,799,676 |  |  |  | 74 | %

Operating Activities

Net cash flows used in operating activities reflects our results for the period adjusted for, among other things, depreciation, unrealized foreign exchange results, share-based payments, changes in working capital and accruals.

Net cash flows used in operating activities increased by €9,058,577, or 257%, from €3,529,943 for the nine months ended September 30, 2019 to €12,588,520 for the nine months ended September 30, 2020, primarily reflecting the increase in costs related to outsourced preclinical, clinical development activities and manufacturing of PHA121, financing activities and the accompanying growth of the Group, in particular with respect to the increase in personnel.

Investing Activities

Net cash flows used in investing activities increased by €31,360 from €4,297 for the nine months ended September 30, 2019 to €35,657 for the nine months ended September 30, 2020, primarily as a result of capital expenditure related to office equipment as a result of the increase in personnel and the number of offices rented.

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Financing Activities

Net cash flows provided by financing activities increased by €11,948,574 from €22,297,707 for the nine months ended September 30, 2019 to €34,246,281 for the nine months ended September 30, 2020, primarily as a result of the proceeds of €34,246,281 from the second tranche of the Series B financing.

Comparison for the years ended December 31, 2019 and December 31, 2018

The following table sets forth our primary sources and uses of our cash and cash equivalents for each of the periods set forth below:

|  | For the year ended December 31, |  |  |  |  |  |  |
|  | 2019 |  |  | 2018 |  |  | Change |  |  | % |
|  | (in €) |  |  |  |
Net cash flows used in operating activities |  |  | (6,677,011 | ) |  |  | (3,918,653 | ) |  |  | (2,758,358 | ) |  |  | 70 | %
Net cash flows used in investing activities |  |  | (13,476 | ) |  |  | — |  |  |  | (13,476 | ) |  |  | n.m. |
Net cash flows provided by financing activities |  |  | 21,631,526 |  |  |  | 4,508,851 |  |  |  | 17,122,675 |  |  |  | 380 | %
Net increase in cash and cash equivalents |  |  | 14,941,039 |  |  |  | 590,198 |  |  |  | 14,350,841 |  |  |  | n.m. |
Cash and cash equivalents at beginning of period |  |  | 5,385,333 |  |  |  | 4,795,135 |  |  |  | 590,198 |  |  |  | 12 | %
Cash and cash equivalents at end of period |  |  | 20,326,372 |  |  |  | 5,385,333 |  |  |  | 14,941,039 |  |  |  | 277 | %

Operating Activities

Net cash flows used in operating activities reflects our results for the period adjusted for, among other things, depreciation, unrealized foreign exchange results, share-based payments, changes in working capital and accruals.

Net cash flows used in operating activities increased by €2,758,358, or 70%, from €3,918,653 for the year ended December 31, 2018 to €6,677,011 for the year ended December 31, 2019, primarily reflecting the increase in costs related to outsourced clinical development activities and manufacturing of PHA121, due to the transition from a preclinical stage into a clinical stage company, financing activities and the accompanying growth of the Company, in particular with respect to the increase in personnel.

Investing Activities

Net cash flows used in investing activities increased by €13,476 from nil for the year ended December 31, 2018 to €13,476 for the year ended December 31, 2019, primarily as a result of expenses related to capital expenditures related to office equipment. In 2018 no such expenses were incurred.

Financing Activities

Net cash flows provided by financing activities increased by €17,122,675, or 380%, from €4,508,851 for the year ended December 31, 2018 to €21,631,526 for the year ended December 31, 2019, primarily as the result of net proceeds from the Series B preferred shares issued in 2019.

Contractual Obligations and Commitments

The following table sets forth information relating to our contractual obligations and commitments as of December 31, 2019:

|  | Total |  |  | Less than 1 year |  |  | Between 1 and 3 years |  |  | More than 5 years |
|  | (in €) |
Service contracts |  |  | 5,013,700 |  |  |  | 4,005,200 |  |  |  | 1,008,500 |  |  |  | — |
Total |  |  | 5,013,700 |  |  |  | 4,005,200 |  |  |  | 1,008,500 |  |  |  | — |

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The table above does not include potential milestone fees, sublicense fees, royalty fees, licensing maintenance fees, and reimbursement of patent maintenance costs that we may be required to pay under the agreement we have entered into with AnalytiCon to license intellectual property. We have not included such potential obligations in the table above because they are contingent upon the occurrence of future events and the timing and likelihood of such potential obligations are not known with certainty. For further information regarding this agreement and amounts that could become payable in the future under this agreement, please see “Business—License Agreement.”

Service Contracts

The commitments from service contracts mainly result from contracts with preclinical and clinical CROs and CDMOs.

Off-Balance Sheet Arrangements

As of September 30, 2020, we did not have any off-balance sheet arrangements other than the disclosed commitments.

Quantitative and Qualitative Disclosures about Market Risk

We are exposed to market risk (including currency risk, interest rate risk and price risk), credit risk and liquidity risk. Our management manages each risk as discussed below.

Currency Risk

We operate internationally and therefore are exposed to currency risk arising from various currency exposure, primarily with respect to the British pound and the US Dollar as we have agreements with CROs which are based in Great Britain, and consulting agreements with parties that are based in the United States. From these transactions, currency risk arises. We have not established a formal policy to manage the currency risk against our functional currency. At September 30, 2020 and December 31, 2019 and 2018, we had a limited amount of trade payables in foreign currency.

Price Risk

The market prices for the provision of preclinical and clinical materials and services, as well as external contracted research, may vary over time. The commercial prices of any of our products or product candidates are currently uncertain and we are not exposed to commodity price risk.

Interest Risk

We have no borrowings and are therefore not exposed to interest risk.

Credit Risk

Our only exposure to credit risk is the carrying amounts of bank balances.

Liquidity Risk

We have no revenues to date and have relied on the financing from shareholders in order to ensure sufficient liquidity. We ensure the availability of cash for operational activities through appropriate budget and liquidity planning. Additionally, we maintain a level of cash, which is managed centrally, to finance our operational activities. As of September 30, 2020, we had cash and cash equivalents of €41,948,476. Subsequent to September 30, 2020 we issued Series C preferred shares in November 2020 for net proceeds of approximately $80 million. We believe we have sufficient capital to continue operations for the next .

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Critical Accounting Estimates and Judgments

We believe that the following accounting policies involve a high degree of judgment and complexity. Accordingly, these are the policies we believe are the most critical to aid in fully understanding and evaluating our consolidated financial condition and results of our operations. See Note 2 to our consolidated financial statements included elsewhere in this prospectus for a description of our other significant accounting policies. The preparation of our consolidated financial statements in conformity with IFRS requires us to make estimates and judgments that affect the amounts reported in those financial statements and accompanying notes. Although we believe that the estimates we use are reasonable, due to the inherent uncertainty involved in making those estimates, actual results reported in future periods could differ from those estimates.

Share-Based Payments

We adopted an equity-settled share-based compensation plan in 2016, pursuant to which certain participants are granted the right to acquire common shares or RSUs of the Company. The grants made under this plan are accounted for in accordance with the policy as stated in Note 2.14 to our consolidated financial statements included elsewhere in this prospectus. The total amount to be expensed is determined by reference to the fair value of the options or RSUs granted.

Due to the lack of quoted market prices, we have determined the fair value for the measurement of the equity-settled transactions at the grant date with assistance of an external appraiser, considering certain assumptions relating to the volatility of stock price, the determination of an appropriate risk-free interest rate and expected dividends.

We consider numerous objective and subjective factors to determine the best estimate of the fair value of the ordinary shares as of each grant date, including:

| • |  | the progress of the research and development programs;

| • |  | contemporaneous third-party valuations of the ordinary shares;

| • |  | the rights and preferences of the preferred shares and the preferred shares relative to the ordinary shares;

| • |  | the likelihood of achieving a discrete liquidity event, such as a sale of the company or an initial public offering given prevailing market conditions; and

| • |  | external market and economic conditions impacting the industry sector.

The fair value of an option or an RSU was measured based on the estimated fair value of an ordinary shares at grant date. An external valuation expert has estimated the fair value of the Company’s ordinary shares as of the grant dates based on the pricing of the most recent financing round of the Company at the time. As we are a private company and the equity instruments are not marketable, an Option Pricing Model with estimated probabilities of two different exit scenarios (IPO and trade sale) was applied to back-solve the Company’s total equity value such that the value per Series A preferred share, Series B preferred share and Series C preferred share is equal to the investment price per share paid in the investment round.

This estimated total equity value has been used as input to the Option Pricing Model when determining the fair value of the Company’s ordinary shares at the measurement dates of March 31, 2016, December 13, 2018, January 1, 2020, February 3, 2020, July 13, 2020 and September 30, 2020. The Option Pricing Model uses the Black-Scholes Option-Pricing Model to determine the fair value of the Company’s different share classes based upon the Company’s total equity value.

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The inputs used in the measurement of the fair value per ordinary share at each grant/measurement date based upon the total equity value were as follows:

|  | September 30, 2020 |  |  | July 13, 2020 |  |  | February 3, 2020 |  |  | January 1, 2020 |  |  | December 13, 2018 |  |  | March 31, 2016 |
Number of options |  |  | 88,000 |  |  |  | 44,000 |  |  |  | 308,000 |  |  |  | 600,000 |  |  |  | 25,295 |  |  |  | 392,850 |
Fair value of the options |  | € | 6.08 |  |  | € | 4.74 |  |  | € | 1.66 |  |  | € | 1.67 |  |  | € | 1.39 |  |  | € | 1.24 |
Fair value of the ordinary shares |  | € | 7.25 |  |  | € | 5.82 |  |  | € | 2.38 |  |  | € | 2.38 |  |  | € | 1.39 |  |  | € | 1.24 |
Exercise price |  | € | 2.38 |  |  | € | 2.38 |  |  | € | 2.38 |  |  | € | 2.38 |  |  | € | 0.01 |  |  | € | 0.01 |
Expected volatility (%) |  |  | 85 | % |  |  | 85 | % |  |  | 85 | % |  |  | 85 | % |  |  | 80 | % |  |  | 90 | %
Expected life (years) |  |  | 6.0 |  |  |  | 6.0 |  |  |  | 6.1 |  |  |  | 6.1 |  |  |  | 0.5 |  |  |  | 3.25 |
Risk-free interest rate (%) |  |  | -0.6 | % |  |  | -0.6 | % |  |  | -0.6 | % |  |  | -0.4 | % |  |  | -0.8 | % |  |  | -0.5 | %
Expected dividend yield |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |

Expected volatility was based on an evaluation of the historical volatilities of comparable listed biotech-companies over the most recent historical period that is commensurate with the expected option life. The expected life is based on Management’s best estimate of when the options will be exercised. The risk-free interest rate is based on the yield on German government Strip bonds, with tenure equal to the expected life. The expected dividend yield is zero considering the stage of the Group.

On March 31, 2016, we granted 392,850 stock options to a consultant, with an exercise price of €0.01. The estimated fair value of the stock options at grant date was €1.24. On December 13, 2018, a total of 25,295 restricted stock units were granted to a consultant. The purchase price, as required under Dutch law, was €0.01 and the estimated fair value at the grant date was €1.39. On January 1, 2020, we granted a total of 600,000 stock options to certain members of our Senior Management, with an exercise price of €2.38. On February 3, 2020, we granted 440,000 stock options to a member of our Senior Management, with an exercise price of €2.38. 132,000 of the options in this grant have, in addition to the service condition, a performance condition. On July 13, 2020, the performance goals for 2020 were determined and the fair value of the related options was reassessed for the options subject to the performance goals for 2020. The fair value of the options related to the performance periods 2021 and 2022 was reassessed on September 30, 2020.

Research and Development Expenditures

Research and development expenses are currently not capitalized but are expensed because the criteria for capitalization are not met, see Note 2.15 and Note 4 to our consolidated financial statements included elsewhere in this prospectus. At each balance sheet date, we estimate the level of services performed by the vendors and the associated costs incurred for the services performed. Although we do not expect the estimates to be materially different from amounts actually incurred, the understanding of the status and timing of services performed relative to the actual status and timing of services performed may vary and could result in reporting amounts that are too high or too low in any particular period.

Internal Control over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting. Internal control over financial reporting is a process designed to provide reasonable assurance

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regarding the reliability of financial reporting and the preparation of financial statements in accordance with IFRS. As a result of becoming a public company, we will be required, pursuant to Section 404 of the Sarbanes-Oxley Act to furnish a report by our management on, among other things, the effectiveness of our internal control over financial reporting in our second annual report after the effectiveness of the registration statement of which this prospectus forms a part. This assessment will need to include disclosures of any material weaknesses identified by our management in our internal control over financial reporting. A material weakness is a deficiency, or combination of deficiencies, in internal control over financial reporting such that there is a reasonable possibility that a material misstatement of a company’s annual or interim financial statements will not be detected or prevented on a timely basis.

In connection with the preparation of our financial statements as of and for the years ended December 31, 2018 and 2019, and as of and for the nine months ended September 30, 2020, we identified material weaknesses in the design of our internal control over financial reporting across the principles for each component of the COSO framework at the entity level (i.e. control environment, risk assessment, monitoring, information & communication and control activities) and accordingly, across our business and IT processes. The material weaknesses that we identified related to:

| • |  | the lack of consistent and documented risk assessment procedures and control activities related to our financial reporting, among which a sufficient level of (management) review and approval, manual processes, roles and responsibilities, and adequate application and controls over information technology; and

| • |  | our failure to maintain a sufficient complement of personnel commensurate with our accounting and reporting requirements as we continue to grow as a company, and ability to: (i) design and maintain formal accounting policies, procedures and controls over the fair presentation of our financial statements; (ii) analyze, record and disclose complex accounting matters timely and accurately, including share-based compensation arrangements and other non-routine transactions; and (iii) design and maintain controls over the preparation and review of journal entries and financial statements, including maintaining appropriate segregation of duties.

Although several oversight and control activities are performed, not all activities are formalized and documented properly. In addition, where control activities are dependent on information used in a control, we do not perform or document controls to determine the completeness and accuracy of such information. We also did not have controls in place to monitor control activities and identify control deficiencies.

To address these material weaknesses, we will need to add personnel and continue to develop and implement new financial processes. We intend to take steps to remediate the material weaknesses described above through hiring additional qualified accounting and financial reporting personnel, and further evolving our accounting processes and policies. We will not be able to fully remediate these material weaknesses until these steps have been completed and have been operating effectively for a sufficient period of time. We cannot assure you that we will be able to successfully remediate these material weaknesses or that other material weakness will not be discovered in the future.

JOBS Act

In April 2012, the U.S. Jumpstart Our Business Startups Act of 2012, or the JOBS Act, was enacted. Section 107 of the JOBS Act provides that an “emerging growth company” can take advantage of the extended transition period provided in Section 7(a)(2)(B) of the Securities Act for complying with new or revised accounting standards. Thus, an emerging growth company can delay the adoption of certain accounting standards until those standards would otherwise apply to private companies. Given that we currently report and expect to continue to report under IFRS as issued by the IASB, we have irrevocably elected not to avail ourselves of this extended transition period and, as a result, we will adopt new or revised accounting standards on the relevant dates on which adoption of such standards is required for other public companies.

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We intend to rely on other exemptions and reduced reporting requirements under the JOBS Act. Subject to certain conditions, as an emerging growth company, we may rely on certain of these exemptions, including without limitation, (i) providing an auditor’s attestation report on our system of internal controls over financial reporting pursuant to Section 404(b) of the Sarbanes-Oxley Act and (ii) complying with any requirement that may be adopted by the Public Company Accounting Oversight Board regarding mandatory audit firm rotation or a supplement to the auditor’s report providing additional information about the audit and the financial statements, known as the auditor discussion and analysis. We would cease to be an emerging growth company upon the earliest to occur of (i) the last day of the fiscal year in which we have more than $1.07 billion in annual gross revenues; (ii) the date we qualify as a “large accelerated filer,” with at least $700.0 million of equity securities held by non-affiliates; (iii) the issuance, in any three-year period, by our Company of more than $1.0 billion in nonconvertible debt securities held by non-affiliates; and (iv) the last day of the fiscal year ending after the fifth anniversary of the global offering. We have taken advantage of reduced reporting requirements in this prospectus. Accordingly, the information contained herein may be different than the information you receive from other public companies in which you hold equity securities.

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BUSINESS

Overview

We are a clinical-stage biopharmaceutical company focused on the development and commercialization of innovative therapies for rare diseases with significant unmet need, initially focused on angioedema and other bradykinin-mediated diseases. Our first molecule, PHA121, is a novel, small-molecule bradykinin B2-receptor antagonist for the treatment of hereditary angioedema, or HAE. Bradykinin-B2-receptor inhibition is a clinically validated mechanism for the treatment of HAE, as demonstrated by icatibant, which is a bradykinin B2-receptor antagonist approved in Europe in 2008 and in the United States in 2011 (as FIRAZYR). We designed PHA121 to improve upon the therapeutic profile of existing therapies and, through oral delivery, to provide patients with quality of life and convenience that is superior to current standard-of-care HAE treatments, which are injectables. We believe PHA121 has the potential to provide a safe, effective and convenient option for both acute and prophylactic treatments of HAE, in the form of our PHVS416 on-demand rapid exposure product candidate, and for prophylaxis of HAE, in the form of our PHVS719 small daily dose extended-release product candidate. We believe that our product candidates may address a broader range of angioedema attacks than other available treatments since PHA121 blocks the actual signal that leads to angioedema (the interaction of bradykinin, or BK, with the bradykinin B2 receptor), rather than an upstream signal. By blocking the action of bradykinin, we can prevent its aberrant signaling regardless of the pathway that generates it. In our Phase 1 completed trials to-date, we have observed that PHA121 was orally bioavailable and well tolerated at all doses studied, with approximately dose-proportional exposure. We also have successfully demonstrated proof-of-mechanism through a clinical pharmacodynamics, or PD, assessment with the bradykinin challenge, which had been utilized as a validated surrogate assessment for dose selection in the icatibant development program. The data also allowed us to compare the projected therapeutic performance of PHA121 with that of icatibant, but we do not yet have data from the PHA121 Phase 2 study. We plan to efficiently progress PHA121 through clinical development for on-demand and prophylactic use with our on-demand product candidate, PHVS416, and extended release product candidate, PHVS719, respectively. We anticipate commencing our RAPIDe-1 Phase 2 clinical trial of PHVS416 in 2021 and have Phase 2 data for the acute treatment of patients with HAE attacks in 2022. We are also planning to commence a Phase 2 clinical trial for prophylaxis in 2021 using twice-daily dosing of the PHVS416 soft capsules. Our primary objective with this trial is to assess the safety profile of PHVS416 dose regimens for prophylactic treatments in HAE patients. We also expect to conduct a bridging study between our formulation of PHVS719 and PHVS416 in a Phase 1 clinical trial starting in 2021.

PHA121 is a novel, highly potent inhibitor and selective small molecule bradykinin B2-receptor antagonist and, to our knowledge, the only orally available bradykinin B2-receptor antagonist currently in development. PHA121 has been observed to be a potent inhibitor in vitro as assessed using human recombinant bradykinin B2 receptors (150 pM); ex vivo as studied against endogenous bradykinin B2 receptors in a human umbilical vein model (350 pM); and in vivo in the human bradykinin-challenge model (170 pM). Potency as used in this prospectus refers to the amount of drug required to produce a pharmacological effect of given intensity and is not a measure of therapeutic efficacy. We do not yet have data from the PHA121 Phase 2 clinical trial to evaluate the potential therapeutic efficacy of PHA121 in HAE patients. PHA121 demonstrated 5000-fold selectivity for the bradykinin B2 receptor when compared to approximately 170 other molecular targets, including the bradykinin B1 receptor. We designed PHA121 as a new chemotype with properties compatible with oral delivery. We are developing PHA121 for the on-demand setting as PHVS416, which is delivered in a soft capsule designed to rapidly treat symptoms with a single dose. We are also developing PHA121 for the prophylactic setting as PHVS719, which is a small daily dose tablet with an extended release formulation designed for the patient to achieve a steady-state plasma concentration within 72 hours.

In our Phase 1 clinical trials to-date, we have observed rapid exposure and predictable linear pharmacokinetics, or PK, with and without food. In addition, we observed PHA121 to be a potent antagonist of the bradykinin B2 receptor, in vitro and in vivo with healthy volunteers. In our models based on PK data from our Phase 1 clinical trial of PHA121 and published data for icatibant, both in the BK challenge assessment, PHA121 was shown to be consistently 25-fold more potent at inhibiting the effects of administered bradykinin than

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icatibant on a molar basis. We have not conducted a head-to-head comparison of icatibant to PHA121 in a clinical trial but have compared the published data for icatibant to data from our Phase 1 clinical trial of PHA121. While we believe this comparison to icatibant to be useful and appropriate, the value of this and other comparisons to icatibant in this prospectus may be limited because they are not derived from a head-to-head trial and they are from trials that were conducted under different protocols at different sites and at different times. Without head-to-head data, we will be unable to make comparative claims for our product candidates, if approved.

HAE is a rare and potentially life-threatening genetic condition with symptoms that include episodes of debilitating and often painful swelling in the hands, feet, face (lips and tongue), gastrointestinal tract, urogenital region or airways. Attacks are unpredictable in frequency, location, timing, and severity, with multiple types of triggers. According to scientific publications, patients experience a median of 14 attacks per year, and half of patients experience a potentially life-threatening airway attack at least once in their lifetime. Airway attacks are particularly dangerous and can lead to asphyxiation. If left untreated, attacks can last multiple days and are commonly painful, leading to multiple sick days and even hospitalization. According to HAE International, as of October 2014, HAE affected from 1:50,000 to 1:10,000 individuals globally, or at least 6,600 patients in the U.S. and at least 8,900 patients in the EU.

Global sales of treatments for HAE achieved approximately $2 billion in 2018 and, according to public research reports, are forecast to grow at an approximately 9% compound annual growth rate to $4.3 billion through 2027. Current approved products treat acute HAE attacks in an on-demand setting or seek to prevent or reduce future HAE attacks in a prophylactic setting. Each of these products generally works in one of the following ways: inhibiting the bradykinin B2 receptor, replacing the deficiency in C1-INH activity or inhibiting plasma kallikrein. Currently all standard-of-care therapies are administered by injection, which patients can find challenging despite their efficacy because these therapies often result in painful injection-site reactions (leading some patients to delay treatment and risk attacks), are time consuming to receive (as some need to be administered in a clinic), and are difficult to carry and/or store. We believe HAE patients are in need of alternatives that better meet their objectives for ease of disease treatment, disease control and improved quality of life. We anticipate that there will be strong interest in safe and effective, orally delivered, small-molecule treatments that can match or improve upon the efficacy profile of existing therapies.

Based on results observed from our three completed and one ongoing clinical trials to-date, we believe our product candidates that contain PHA121 will demonstrate advantages and differentiation relative to currently approved HAE therapies and other oral therapies in clinical development. Namely, PHA121’s bradykinin- B2-receptor-inhibition mechanism has a well-established clinical therapeutic profile in a currently approved product in the rapid treatment of acute HAE attacks. We have observed greater potency for PHA121 compared to icatibant in our early clinical trials, potentially resulting in both a smaller therapeutic dose and a longer duration of effect. We evaluated the PD and PK of PHA121 in a bradykinin-challenge model in healthy subjects. The bradykinin challenge was validated as a surrogate assessment for dose selection in the original development program for icatibant, as reviewed by the FDA and the EMA. The clinical dose of icatibant established with the bradykinin challenge has demonstrated successful treatment of HAE attacks in multiple randomized clinical trials and over 10 years of clinical experience. We conducted a proof-of-concept clinical trial testing the effects of BK in healthy volunteers in our bradykinin-challenge trial, where we evaluated the effect of PHA121 on cardiovascular parameters affected by bradykinin such as blood pressure, heart rate and cardiac output in healthy volunteers. We observed that PHA121 was more potent in blocking the effects of BK in humans than icatibant, when comparing the PHA121 results of the trial to published data on icatibant. The data from this trial allowed us to generate a PK/PD correlation model. Based on this model and published data on icatibant, we predict the duration of effect for a single oral dose of 12 mg PHA121 will exceed that of 30 mg of icatibant and a single oral dose of 22 mg PHA121 will cover the same duration of effect as two icatibant injections of 30 mg administered six hours apart. Furthermore, analysis based on the results from this trial suggest that therapeutic doses of PHA121 may be at least 20 times smaller than the doses required for oral kallikrein inhibitors in development. In addition, we believe that the observed PK profile of our compound demonstrates the potential of PHVS719 as a

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prophylactic treatment of HAE by achieving steady-state plasma concentrations within 72 hours. The BK-challenge data was generated in a Phase 1 clinical trial, and we do not yet have data from the PHA121 Phase 2 clinical trial to evaluate the potential efficacy of PHA121 in HAE patients. We have not conducted a head-to-head comparison of icatibant to PHA121 in a clinical trial but have compared the published data for icatibant to data from our Phase 1 clinical trial of PHA121. Potency as used in this prospectus refers to the amount of drug required to produce a pharmacological effect of given intensity and is not a measure of therapeutic efficacy.

We are planning a Phase 2 clinical trial, RAPIDe-1, that will evaluate angioedema symptom relief within four hours of different doses of PHVS416 or placebo while treating acute attacks of patients. We anticipate having Phase 2 data from RAPIDe-1 in 2022. Additional trials may be required by the FDA, EMA or other regulators even if we receive positive data from RAPIDe-1. We are also planning to subsequently conduct a pivotal trial in the on-demand setting.

We are similarly planning two clinical trials in the prophylactic setting. In the first, subjects will be randomized to receive PHVS416 or placebo for three months. The primary objective is to assess the safety profile in HAE patients. For the second, we are planning a registration-directed trial with patients who will be randomized to receive PHVS719 or placebo to assess safety and efficacy in HAE patients. In addition, we also plan to run an open-label extension study in the prophylactic setting with both rollover and non-rollover subjects to collect longer duration safety data.

Differentiation of PHA121

We believe that PHA121, as the molecule underlying both PHVS416 and PHVS719, has the potential to be highly differentiated for both the on-demand and prophylactic settings with the key benefits below:

PHVS416. We believe that PHVS416, an on-demand, rapid exposure soft capsule, has potential to be highly differentiated for patients suffering from acute HAE attacks with the following benefits:

Complete Symptom Resolution |  | •   Clinically validated mechanism of bradykinin-B2-receptor antagonism •   Utilizing same surrogate assessment for dose selection as the development program for icatibant •   More potent inhibitor than icatibant •   Longer half-life than icatibant
Rapid Onset of Activity |  | •   Exposure exceeds the anticipated threshold therapeutic plasma level (EC85) in 15 minutes, with or without food
Potential Reduced Treatment Burden / Enhanced Patient Convenience |  | •   No injection needed •   Convenient oral formulation enables early treatment of acute HAE attacks •   Capsule reduces treatment burden •   Potential lowest dosage of any oral HAE on-demand treatment

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PHVS719. We believe that PHVS719, a prophylactic extended-release tablet designed to be taken in small, daily doses, has potential to be highly differentiated for HAE patients with the following benefits:

Protection From Attacks |  | •   Validated, proven mechanism to address all bradykinin, regardless of pathway
Ideal Release Profile for Prophylactic Use |  | •   Reaches and maintains steady-state concentration within 72 hours •   Appropriate pharmacokinetic profile with standard meals
Potential Reduced Treatment Burden / Enhanced Patient Convenience |  | •   Convenient oral daily dosing with extended-release tablet •   Twice-daily dosing with the potential for once a day •   Potential lowest dosage of any oral HAE treatment; ease of administration •   Well tolerated throughout therapeutic ranges as demonstrated by multiple clinical trials to-date •   No injection needed

Our Pipeline

We plan to develop separate products for on-demand and prophylactic use, PHVS416 and PHVS719 respectively, with both products utilizing the same active ingredient, PHA121. PHVS416 will be a soft-gel capsule, and PHVS719 will be an extended release tablet. We expect to commence our RAPIDe-1 Phase 2 clinical trial of PHVS416 for on-demand use in 2021. We are also planning to commence a Phase 2 clinical trial for prophylaxis in 2021. In this trial, we plan to assess twice-daily dosing of PHVS416 soft gel capsules for prophylactic use while we continue to advance the development of our extended-release formulation, PHVS719. A bridging study between our formulation of PHVS719 and PHVS416 in a Phase 1 clinical trial is planned in 2021 before conducting the trial of PHVS719 in the prophylactic setting.

Expansion of the Portfolio

Our ultimate goal is to expand our portfolio with additional programs addressing other BK-mediated diseases, building on our strategic strength and expertise in the bradykinin-B2-receptor pathway. Our approach is to identify additional disease areas and indications with strong scientific rationale, high unmet medical need, a defined target population and significant differentiation potential. We are actively pursuing new synthesis,

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medicinal chemistry and lead optimization to identify additional and/or follow-on product candidates. In collaboration and discussion with key opinion leaders, we are considering exploratory proof-of-concept studies to validate the potential of bradykinin-B2-receptor antagonism in new indications such as cardiovascular, allergy and immunology, neurological disease and others.

Our Team and Investors

We are led by a strong management team with extensive experience in the biopharmaceutical industry and rare disease drug development, most notably the development of drugs for the treatment of HAE. Our Chief Executive Officer, Berndt Modig, has extensive experience in the pharmaceutical industry, most recently as Chief Financial Officer of Prosensa Holding N.V. and Chief Financial Officer of Jerini AG, which developed and launched icatibant. Our Chief Scientific Officer and Chief Operating Officer, Jochen Knolle, Ph.D. has extensive experience in every aspect of drug discovery as the former Chief Science Officer and Head of R&D at Jerini AG, former Vice President for Medicinal Chemistry and Structural Biology at Axys Pharmaceuticals Inc., and Hoechst AG and Hoechst-Marion-Roussel where he co-invented icatibant. Our Chief Medical Officer, Peng Lu, M.D., Ph.D. previously served as Vice President, Global Program Lead for Rare Diseases at Shire PLC, now Takeda Pharmaceutical Company Limited, where she led the development and successful approval of TAKHZYRO for the prevention of HAE attacks in the U.S., the EU and the rest of the world. Our Chief Early Development Officer, Anne Lesage, Ph.D. brings in deep expertise in drug discovery and GPCR pharmacology, has held various leadership positions at Janssen Pharmaceutica and is inventor on nine patents and author on 45 publications. Our Chief Business Officer, Morgan Conn, Ph.D. has extensive experience in the biopharmaceutical industry including as the Head of Business Development at PTC Therapeutics, Inc. where he was instrumental to a variety of financing events and corporate transactions with leading pharma, biotech, and academic organizations. In addition, we are backed by a group of renowned institutional investors and have raised over $163 million of capital since our inception, including our recent financing that closed on November 5, 2020. Our investors include LSP, Kurma Partners, Idinvest Partners, Foresite Capital, Bain Capital Life Sciences, venBio Partners, Venrock Partners, Viking Global Investors, General Atlantic, and Cormorant Asset Management.

Our Strengths

Our company is built upon the following strengths:

| • |  | Broad strength and expertise in the bradykinin-B2-receptor pathway. Members of the management team include an inventor of icatibant, the leadership team that developed icatibant through European approval, and a key member from the TAKHZYRO development team;

| • |  | PHA121 is an orally available product candidate with a clinically validated mechanism of action that addresses serious unmet medical need in HAE;

| • |  | PHA121 has demonstrated physicochemical properties suitable to formulations as both an on-demand product candidate, PHVS416, and a distinct prophylactic product candidate, PHVS719;

| • |  | PHA121, compared to icatibant, the currently approved bradykinin B2-receptor inhibitor, demonstrated superior preclinical potency in blocking bradykinin signaling at the bradykinin B2-receptor, and good oral bioavailability and a longer half-life in humans, which has resulted in longer duration of the BK-blocking pharmacodynamic effect in humans;

| • |  | We wholly own intellectual property – including allowed and in-process patent applications – covering PHA121 and additional molecules; and

| • |  | Our scientific experience allows us to leverage deep insight and experience in the bradykinin- B2-receptor pathway to expand our portfolio into other BK-mediated angioedema and BK-mediated diseases beyond angioedema.

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Our Strategy

Our strategy is to develop and commercialize therapies that are superior to currently available treatment options and improve patient quality of life and convenience. Our initial approach for HAE and potential expansions into non-hereditary angioedema and other BK-mediated diseases is based upon extensive patient, physician and payer research to identify the key needs in the market. According to our analysis, oral therapy remains the highest unmet need for both on-demand and prophylactic use in HAE. More importantly, our research shows that patients are not willing to accept significantly reduced efficacy or safety with a switch to oral therapy, and so we place a high degree of emphasis on advancing product candidates that we believe can be comparable to or improve upon existing approved therapies in both safety and efficacy.

The key elements of our strategy include:

| • |  | Continue to advance PHA121 through clinical development for on-demand treatment of HAE utilizing a fast-onset formulation, known as PHVS416. We intend to develop and commercialize PHVS416 as a fast-acting, orally available, potent inhibitor and selective treatment for acute HAE. If considered appropriate by the FDA, we plan to pursue an expedited regulatory pathway that could allow us to more quickly provide patients with a potentially more effective oral therapy that is also more convenient.

| • |  | Advance the development of PHA121 for prophylactic treatment of HAE utilizing an extended-release formulation, known as PHVS719. We intend to advance PHVS719 through clinical development as an extended-release prophylactic treatment of HAE. We plan to leverage our clinical data and experience from the development of PHVS416 in the on-demand setting to expedite our efforts in the prophylactic setting. We expect the PK data from our Phase 2 trial RAPIDe-1 of PHVS416 to help select and refine our prophylactic dose for the PHVS719 clinical trials.

| • |  | Expand the range of bradykinin-mediated angioedema indications to which PHVS416 and PHVS719 can be applied. In addition to Type 1 or Type 2 HAE, bradykinin is also an important mediator for other types of non-histaminergic angioedema, such as: non-histaminergic angioedema with normal C1-INH and acquired angioedema (AAE) due to C1-INH deficiency. Currently there are still no approved treatments for these angioedema patients who are unresponsive to conventional antihistamine/glucocorticoid treatment and have a high unmet medical need for effective therapies. Several clinical reports indicate that off-label use of icatibant has successfully treated acute attacks of non-histaminergic angioedema patients, which provides a strong rationale to expand the development PHVS416 and PHVS719 to address such a high unmet medical need.

| • |  | Expand upon our expertise in the bradykinin-B2-receptor pathway. We intend to leverage the strategic strengths, insight, and deep experience of our team in the bradykinin-B2-receptor pathway to identify additional disease areas and indications with strong scientific rationale, high unmet medical need, a defined target population and significant differentiation potential. As such, we will seek to develop follow-on product candidates that serve additional BK-mediated diseases beyond angioedema, such as cardiovascular, allergy and immunology, neurological disease or others.

| • |  | Commercialize our product candidates. We intend to retain economic and commercial ownership of our current product candidates. If approved, we expect to independently commercialize both PHVS416 and PHVS719 in the United States, Europe and certain other countries. As we advance towards regulatory approval for our product candidates, we will establish a focused commercialization and sales infrastructure suitable for HAE.

Hereditary Angioedema

Disease Overview

HAE is a rare and potentially life-threatening genetic condition. HAE is an autosomal dominant disease, meaning that a defect in only one copy of the gene leads to symptoms and that it occurs at similar rates in both males and females. It is mainly caused by one or more mutations (inherited or spontaneous) in the SERPING1

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gene, which codes for the C1-esterase inhibitor protein C1-INH. Deficiency or malfunction of C1-INH leads to uncontrolled synthesis and activity of plasma kallikrein and unconstrained BK production. Excessive BK production is recognized to be the key mediator of symptoms in patients with HAE and manifests as edema attacks, most commonly in the limbs, face (lips and tongue), intestinal tract, urogenital region and airways. HAE patients with a deficiency in C1-INH activity are classified as Type 1 or Type 2. Type 1 is the most common form and results in low levels of circulating C1-INH, and Type 2 results in production of a low function protein. An additional form of HAE, called normal C1-INH HAE, can occur in patients with normal levels of C1-INH for a variety of reasons including mutations in genes for Factor XIIa, plasminogen, angiopoietin-1 or kininogen-1. Moreover, bradykinin-induced acute attacks of angioedema can occur idiopathically in individuals for which a hereditary cause has not yet been identified. Excessive amounts of BK can also be caused by increased circulation of estrogens, reduced C1-INH levels due to underlying diseases, reduced elimination of BK, or through use of medications such as angiotensin-converting enzyme, or ACE, inhibitors and tissue plasminogen activator, or tPA.

Excessive BK generation and increased risks for edema attacks in HAE may occur during conditions associated with inflammation, infections, ischemia and allergic reactions. Attacks often lead to discomfort, pain and nausea but can become life-threatening in the case of airway obstruction, with a 30% risk of asphyxiation if the attack remains untreated. The number and severity of attacks vary highly between patients, and the most severely affected patients can experience attacks every few days. Attacks can occur spontaneously although they often are associated with anxiety, stress, minor trauma, surgery, or illnesses. Commonly, patients are alerted to an impending attack by prodromal symptoms which include rash, fatigue, and muscle aches. The severity of attacks is unpredictable and not related to their underlying frequency. Airway swelling is particularly dangerous and can lead to death by asphyxiation. Although rare, at least half of HAE patients have experienced a life-threatening airway swelling attack and airway attacks remain a major cause of mortality in HAE patients. Swelling typically develops over 24 hours and resolves within five days without treatment. Symptoms typically present in young children and may take 5-10 years or until early adolescence or young adulthood to be diagnosed. HAE affects 1:50,000 to 1:10,000 individuals globally, or at least 6,600 patients in the U.S. and at least 8,900 patients in the EU.

As a result of the lifelong nature of HAE and the challenges related to the use of many of the injected therapies, patient surveys consistently indicate an overwhelming desire for an oral therapy. We believe that a safe and effective oral agent has the potential to transform treatment for this disease. We also believe that opportunities exist for both acute and prophylactic treatments, and we intend to develop drug candidates for both on-demand and prophylactic use with the goal of providing patients with a set of oral options to prevent and treat their disease.

Current Treatments and Their Limitations

There are currently two treatment approaches to the management of HAE: acute (on-demand) treatment of attacks and prevention of attacks with short- or long-term prophylactic therapy.

| • |  | On-Demand Treatment: The currently approved products for treatment of acute HAE attacks are all injectable products and include C1-INH replacement products such as human plasma-derived C1-INH concentrates (BERINERT, CINRYZE, and CETOR) or recombinant human C1-INH (RUCONEST), the bradykinin-B2-receptor antagonist icatibant (FIRAZYR), and the plasma kallikrein inhibitor ecallantide (KALBITOR), which has been known to cause allergic reactions including anaphylaxis and must be administered by a doctor or nurse in a healthcare setting. The C1-INH concentrate products are isolated from donated human plasma and historically have been impacted by supply shortages. Subcutaneous, or s.c., icatibant is the only available bradykinin B2-receptor antagonist indicated for treatment of acute HAE attacks Type 1 or Type 2 with C1-INH deficiency. In acute HAE attacks, icatibant has been shown to provide a significantly faster onset of relief than placebo (2.0 h versus 19.8 h). Icatibant is recommended as a first-line treatment option for the treatment of acute HAE attacks in patients with HAE.

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| • |  | Prophylactic Treatment: Currently approved prophylactic therapies for HAE include C1-INH replacement products, such as intravenously delivered CINRYZE and subcutaneously delivered HAEGARDA/BERINERT 2000/3000 (both of which require twice-weekly injections), and the monoclonal antibody and plasma kallikrein inhibitor lanadelumab-flyo (TAKHZYRO). Current treatment guidelines recommend against the use of the traditional oral medications for HAE, such as antifibrinolytics (tranexamic acid or epsilon aminocaproic acid) for HAE due to their limited efficacy. Attenuated androgens (e.g. danazol, stanozolol, and oxandrolone) are recommended only as second-line treatments for the prevention of HAE attacks, since there are numerous contraindications, therapeutic class adverse events, or AEs, and overall suboptimal control of HAE in many patients. The use of attenuated androgens is limited by numerous safety issues, including seborrhea, altered libido, depression, fatigue, menstrual abnormalities, and masculinization.

To our knowledge, three other angioedema-specific oral medications for acute, as well as prophylactic, use are in clinical development, and one, ORLADEYO (also known as berotralstat or BCX7353), was approved in the U.S. in the fourth quarter of 2020. All of these are kallikrein inhibitors. The angioedema-specific oral medications which, to our knowledge, are currently in clinical development, include:

Company |  | Asset |  | Mechanism of Action |  | Route of Administration |  |  | Trial Phase |  | Role in Therapy
KalVista |  | KVD900 |  | Kallikrein inhibitor |  |  | Oral |  |  | 2 |  | Acute treatment
| KVD824 |  | Kallikrein inhibitor |  |  | Oral |  |  | 1 |  | Prophylaxis
Attune |  | ATN-249 |  | Kallikrein inhibitor |  |  | Oral |  |  | 1 |  | Prophylaxis

We believe that the properties and mechanism of PHA121 enable us to develop oral product candidates that will be generally more convenient for patients to take, without sacrificing efficacy for treatment or prevention of angioedema attacks. For example, the known oral kallikrein inhibitors tested in on-demand settings to date have utilized doses that are more than twenty-fold higher than the dose we predict for PHVS416, and have not yet demonstrated efficacy matching the approved injectable products. In the prophylactic setting, oral kallikrein inhibitors have not yet demonstrated efficacy similar to the approved injectable products, and have used or are projected to use doses much higher than we project for PHVS719.

Related indications to BK

In addition to Type 1 or Type 2 HAE, bradykinin is also an important mediator for other types of non-histaminergic angioedema, such as: non-histaminergic angioedema with normal C1-INH and acquired angioedema (AAE) due to C1-INH deficiency. Unlike HAE Types 1/2, for the other forms of non-histaminergic angioedema, an unclear pathophysiology and lack of consistent diagnostic criteria have limited the opportunity for the clinical investigation and new treatment development. Consequently, there are still no approved treatments for non-histaminergic angioedema patients with normal C1-INH or AAE due to C1-INH deficiency, who are unresponsive to conventional antihistamine/glucocorticoid treatment and have a high unmet medical need for effective modern therapies. Recently the clinical research for non-histaminergic angioedema has made significant progress. Similar to Type 1 or 2 HAE, the kinin pathway potentially plays a critical role in the underlying pathophysiology of non-histaminergic angioedema, for example, bradykinin has been shown to be elevated in plasma from non-histaminergic angioedema patients during acute attacks and several clinical reports indicate that icatibant has successfully treated acute attacks in either non-histaminergic angioedema patients with normal C1-INH or AAE due to C1-INH deficiency patients. All these provide strong rationales to expand the development PHVS416 and PHVS719 to these types of BK-mediated angioedema and address the high unmet medical need.

PHA121

Overview

Since the 1990s, many companies have tried but failed to discover oral bradykinin-B2-receptor antagonists, as the bradykinin B2 receptor has proved to be a difficult target for the development of orally available antagonists. Historically, compounds targeting the bradykinin B2 receptor with adequate potency have had

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physicochemical properties inconsistent with oral bioavailability. The bradykinin B2 receptor is a G-protein coupled receptor (GPCR) that binds to the peptide bradykinin in an elongated fashion. It has been challenging to identify a small molecule that can bind in this pocket potently enough to compete with bradykinin while still being small enough with appropriate properties to demonstrate oral bioavailability. Starting with modeled structures of the bradykinin-binding pocket of the bradykinin B2 receptor, we designed and synthesized a novel lead series (a set of molecules with the potential to be further optimized). Through our lead optimization program, we synthesized over 600 compounds to select a small molecule that is designed to fit in the bradykinin-binding pocket at the bradykinin B2 receptor, preventing or halting its signaling activity, while also possessing desirable physicochemical properties and other profiling characteristics.

Bradykinin is the principal mediator of the signs and symptoms that represent acute HAE and other bradykinin-mediated angioedema attacks. Bradykinin is a potent and selective agonist of the bradykinin B2 receptor.

In HAE and other bradykinin-mediated angioedema, contact activation triggers increased activity of plasma kallikrein, resulting in excessive breakdown of high-molecular-weight kininogen (HMWK) and increased production of cleaved HMWK (cHMWK) and bradykinin.

Excessive bradykinin generation, as in HAE, promotes vascular permeability by activating the bradykinin B2 receptor, leading to plasma extravasation and subcutaneous or submucosal tissue swelling typical of an angioedema attack.

As the figure below illustrates, treatment with PHA121, an orally bioavailable low-molecular weight, potent, competitive and selective antagonist of the human bradykinin B2 receptor, is intended to block and prevent activation of the bradykinin B2 receptor by elevated bradykinin levels and prevent or halt the angioedema process, with reduced or resolved swelling as a consequence. PHA121 therefore has the therapeutic potential for both acute on-demand treatment and long-term prevention of attacks in patients with bradykinin-mediated angioedema.

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PHA121 combines the preclinical selectivity of bradykinin-B2-receptor antagonism with oral bioavailability and extended exposure upon a single dose. PHA121 is being developed to become the first effective orally administered antagonist of BK activity with therapeutic potential for both acute on-demand treatment and long-term prevention of attacks in patients with HAE and other BK-mediated angioedema.

PHA121 is an orally bioavailable competitive antagonist of the bradykinin B2 receptor with high affinity and high antagonist potency. PHA121 has been observed to be a potent inhibitor in vitro as assessed using human recombinant bradykinin B2 receptors (150 pM); ex vivo as studied against endogenous bradykinin B2 receptors in a human umbilical vein model (350 pM); and in vivo in the human bradykinin-challenge model (170 pM). PHA121 demonstrated 5000-fold selectivity for the bradykinin B2 receptor when compared to approximately 170 other molecular targets, including the bradykinin B1 receptor. As shown in the graphs below depicting mean arterial blood pressure (MABP) in a bradykinin challenge study in monkeys (back-translated from human), PHA121 showed clear dose-dependent activity. While differences between human and monkey PK prevent direct extrapolation to human dose, PHA121 demonstrated longer duration and faster onset of activity than injected icatibant in the same study. We have not conducted a head-to-head comparison of icatibant to PHA121 in a clinical trial but have compared the published data for icatibant to data from our Phase 1 clinical trial of PHA121. While we believe this comparison to icatibant to be useful and appropriate, the value of this and other comparisons to icatibant in this prospectus may be limited because they are not derived from a head-to-head trial and they are from trials that were conducted under different protocols at different sites and at different times. Without head-to-head data, we will be unable to make comparative claims for our product candidates, if approved.

BK-Challenge in Pre-Clinical Animal Model

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In a published study conducted by the Company, a dose of 0.6mg/kg sc icatibant was used in monkeys, as PK data indicated that this dose would provide an exposure (Cmax 1,044 ng/ml, AUC 2,155 ng*h/ml, PHA0221-NC041) similar to the exposures seen in humans at a therapeutic dose of 30 mg sc (Cmax 979 ng/ml, AUC 2,191 ng*h/ml). The dose was found to effectively antagonize the BK challenge in monkeys up to six hours after dosing, similar to its duration of action in humans. The maximal effect of icatibant in this model was reached at the second measure time point, two hours after dosing. The vehicle in the icatibant study was saline.

PHA121 inhibited the BK-induced changes in MABP at all doses tested (0.1, 0.3, 1, 3 and 10 mg/kg given orally). The data show an early onset of activity, as the efficacy was already maximal at the first time point measured, one hour after oral dosing. This is a faster onset of action as compared to icatibant (0.6 mg/kg sc), which was maximally active on the BK-induced changes in MABP at two hours after dosing.

Preclinical Toxicology

We conducted secondary and safety pharmacology studies for PHA121 which did not reveal any safety concerns at exposure levels achieved or anticipated in conducted or planned clinical trials. In addition, PHA121 did not demonstrate any genotoxic or phototoxic potential. In repeat-dose general toxicity Good Laboratory Practices, or GLP studies in the rat and cynomolgus monkey of up to 3 months duration, and at doses up to the maximum tolerated in each species, no target organs of toxicity considered relevant to humans were observed. Functional assessment of male and female fertility is not yet complete but from repeat-dose GLP toxicity studies in rat and monkey, of up to 3 months duration, there are no organ weight or histopathological changes of concern in the reproductive tract of either gender. Furthermore, PHA121 has not demonstrated any adverse effects on embryo-fetal development in dose-range-finding embryo-fetal development studies in the humanized bradykinin-B2-receptor transgenic rat or in the rabbit.

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Clinical Trial Program

Study Number |  | Short Description |  | Design |  | Status
Phase 1
C001 |  | Single ascending dose (SAD) and BK challenge / SAD-proof of mechanism (POM) |  | Randomized, double-blind, placebo-controlled, single ascending dose to assess safety and proof-of-mechanism through BK-challenge |  | Completed
C002 |  | SAD extension |  | Randomized, double-blind, placebo-controlled, single ascending dose to assess safety |  | Completed
C003 |  | Absorption, metabolism and excretion (mass balance) |  | Open-label, single dose 14C-PHA121 to characterize the absorption, metabolism and excretion |  | Planned (2021)
C004 |  | Drug-drug interaction (DDI)—CYP3A4 inhibitor (itraconazole) interaction |  | Open-label, single-sequence, crossover DDI study |  | Completed
C005 |  | DDI—CYP interaction (cocktail) |  | Open-label, single-sequence, crossover DDI study |  | Planned (2021)
C006 |  | Multiple ascending dose (MAD) |  | Randomized, double-blind, placebo-controlled, multiple ascending dose to assess safety and different doses |  | Completed
Phase 2
C201 RAPIDe-1 |  | PHVS416 on-demand |  | Phase 2, randomized, double blind, placebo-controlled, dose ranging study to assess safety and efficacy |  | Initiating (2021)

PHA121-C001 (SAD and BK challenge / SAD-POM)

PHA121-C001 was a randomized, double-blind, placebo-controlled, single ascending dose and proof-of-mechanism study to examine the safety, tolerability, PK and PD of orally administered PHA121 in healthy subjects. A total of 52 subjects received single ascending oral doses of PHA121 up to 22 mg. The 16 remaining subjects received placebo. No adverse event, or AE, was reported as serious, no premature withdrawals due to AEs occurred and no severe AEs were reported. In addition, no clinically relevant fluctuations of blood pressure and no orthostatic hypotension linked to PHA121 groups occurred. The overall incidence of AEs was similar between the placebo and PHA121. Treatment-related AEs were reported for three subjects who received PHA121 (12 or 22 mg), all within the gastrointestinal system and of mild severity: upper abdominal pain, vomiting, and nausea. There were no apparent trends or dose-related changes in hematology, clinical chemistry, vital signs, or ECG.

Pharmacokinetics Analysis

Dose proportional PK was observed after single oral administration under fasting condition of PHA121 in the dose range of 1 mg to 22 mg for Cmax, AUClast and AUCinf. Median tmax in the dose range of 1 mg to 22 mg was between 0.50 hour and 1.00 hour, with comparable ranges of individual values (ranging between 0.25 hour and 1.02 hours). Less than 1% of the dose was excreted unchanged in urine within 72 hours after administration.

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Dose (mg) |  | Cmax (ng/mL) |  | C0.25h (ng/mL) |  | C12h (ng/mL) |  | Tmax (h) |  | t1/2 (h)
1 |  | 11 |  | 6 |  | 0.5 |  | 0.5 |  | 3.5
2 |  | 20 |  | 13 |  | 0.8 |  | 0.75 |  | 4.3
4.5 |  | 33 |  | 13 |  | 1.9 |  | 1.0 |  | 4.4
12 |  | 97 |  | 60 |  | 5.6 |  | 0.5 |  | 4.3
22 |  | 213 |  | 143 |  | 8.3 |  | 0.75 |  | 5.6
22 (high-fat, high cholesterol) |  | 145 |  | 48 |  | 19.6 |  | 3.0 |  | 5.3

In this study, a high-calorie, high-fat meal reduced peak exposure and slightly increased overall exposure of PHA121: after a 22 mg dose, the mean Cmax of PHA121 was lower (~32%) while AUCinf was higher (~ 42%) when PHA121 was administered after a high calorie, high-fat breakfast (fed conditions) compared to administration under fasted conditions. While the median Tmax of PHA121 was delayed by approximately two hours after administration under fed conditions, the plasma concentration for PHA121 still reached the projected therapeutic levels (EC85, as determined in the bradykinin challenge described below) within 15 minutes. As shown in the table, the concentration of PHA121 twelve hours post-dosing at 12 mg or 22 mg remained above projected therapeutic levels under both fed and fasted conditions.

Bradykinin Challenge Study

In addition, we also evaluated the PD of PHA121 in a bradykinin challenge model, which was designed to demonstrate PHA121-mediated inhibition of the drop in blood pressure and increase in heart rate resulting from injection of a bradykinin bolus in healthy subjects. The bradykinin challenge is administered at specific intervals after the PHA121 or placebo dose, and the inhibition of bradykinin-induced hemodynamic effects is a validated surrogate assessment that was used to select the dose in the original development program for icatibant, as reviewed by FDA and EMA. The clinical dose of icatibant established with the bradykinin challenge has demonstrated successful resolution of HAE attacks in randomized clinical trials and over 10 years of data post-approval.

In the bradykinin challenge, we assessed the inhibition of bradykinin effects at single doses of 12 and 22 mg PHA121. Bradykinin was injected intravenously before PHA121 to calibrate each subject’s response, and then at 1, 4, 8, 12 and 24 hours after dosing with PHA121. We monitored cardiovascular responses at each time point (see figure above). At the same time, blood samples were drawn for PK assessment. Bradykinin injection induced a short-term change in mean arterial blood pressure, or MABP, heart rate, or HR, and cardiac output. In the presence of PHA121, this cardiovascular response was dampened to an extent depending on the concentration of PHA121.

We conducted a PK/PD analysis using the same approach as used by FDA in their evaluation of icatibant. The composite EC50 and EC85 values estimated from the combination of each PD response associated with the BK challenge are provided in the table below. PHA121 demonstrated higher PD potency based on plasma concentrations (roughly four-fold) than icatibant relative to published data for icatibant. Adjusting for the differences between molecular weight and plasma protein binding, we found that PHA121 is 24-fold more potent (170 pM) in the bradykinin challenge than icatibant (4.1 nM) on a molecule-by-molecule basis, consistent with our preclinical in vitro measurements.

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Composite average |  | PHA121 |  | Icatibant
EC50 (ng/mL) |  | 2.4 |  | 9.5
EC85 (ng/mL) |  | 13.8 |  | 53.8

EC50: concentration at which compound induces a response half of its maximum possible response; EC85: concentration at which a compound induces 85% of its maximum response.

The data also allowed us to compare the projected therapeutic performance of PHA121 with that of icatibant, but we do not yet have data from the PHA121 Phase 2 study. In addition, we have not conducted a head-to-head comparison of icatibant to PHA121 in a clinical trial but have compared the published data for icatibant to data from our Phase 1 clinical trial of PHA121. While we believe this comparison to icatibant to be useful and appropriate, the value of this and other comparisons to icatibant in this prospectus may be limited because they are not derived from a head-to-head trial and they are from trials that were conducted under different protocols at different sites and at different times. Without head-to-head data, we will be unable to make comparative claims for our product candidates, if approved. Clinical trials have shown for icatibant that the therapeutic response to an acute HAE attack wanes approximately 6 hours after dosing, coinciding with the drop in icatibant concentration below therapeutic levels due to the short half-life (1.4 hours) of the drug. More precisely, it was shown that icatibant plasma concentrations with a 75% probability to be above EC50 and a 50% probability to be above EC85 correlate with therapeutic efficacy. Applying these criteria as exposure targets for PHA121 leads us to project that due to PHA121’s longer half-life, we believe PHA121 will stay above these therapeutic targets for much longer than icatibant. The 12 mg dose of PHA121 showed rapid absorption and then stayed above EC50 for 10-12 hours and above the EC85 for 7 hours, suggesting that this dose may be at least as effective as a 30 mg s.c. injection of icatibant. A 30 mg s.c. icatibant dose has been documented to effectively treat 93% of acute HAE attacks (Icatibant Outcome Survey, or IOS, study reference).

The table below compares 30 mg of icatibant to 12 mg and 22 mg of PHA121 based on BK-challenge modeling and simulation.

Response |  | Icatibant 30 mg (s.c.) |  | PHA121 12 mg (oral) |  | PHA121 22 mg (oral)
|  | Time (h) plasma level above EC50 at a 75% confidence level
Diastolic blood pressure (DBP) |  | 6 |  | 11.5 |  | 14
MABP |  | 6 |  | 12 |  | 15.5
Heart rate |  | 6.5 |  | 10 |  | 13
|  | Time (h) plasma level above EC85 at a 50% confidence level
DBP |  | 5.5 |  | 7.5 |  | 10
MABP |  | 5.5 |  | 7 |  | 10
Heart rate |  | 5.5 |  | 6.5 |  | 9.5

The chart below shows the simulation of PK and PD resulting from single (left) or double (right) doses of icatibant as compared to single doses of PHA121 at 12 mg (left) or 22 mg (right), using a non-linear mixed-effect model built from published data of icatibant and our bradykinin challenge study. As shown in the bottom row, the modeled PD effect of PHA121 surpasses that of icatibant at less than half the dose, and equals two 30 mg injections of icatibant with a single oral dose of 22 mg. As demonstrated in a post-commercialization observational study (IOS study reference), a single dose of icatibant was shown to treat 93% of attacks and two doses treated 99% of over 5,000 attacks in the 10 year survey.

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In conclusion, PHA121 was well tolerated when administered orally at the doses tested without any dose-limiting toxicity. PHA121 was rapidly absorbed in either fasting or fed conditions and showed dose proportional PK for PHA121. The BK challenge demonstrated that PHA121 potently blocks the effects of bradykinin-induced hemodynamic changes and provided the robust rationale for dose selection in future on-demand and prophylactic HAE trials.

PHA121-C002 (SAD extension)

PHA121-C002 was a randomized, double-blind, placebo-controlled, single ascending dose extension trial designed to examine the safety, tolerability, and PK of single ascending oral doses of 22, 33, and 50 mg of PHA121 after a standard caloric meal and 40 mg in fasting conditions. A total of 32 subjects received either PHA121, with respect to 24 subjects, or placebo, with respect to 8 subjects.

The trial results showed that PHA121 was well tolerated at doses up to 40 mg under fasting and 50 mg under fed conditions. There were no SAEs reported. Treatment-related AEs that were reported as possibly related to PHA121 were mild nausea (22 mg) (one subject), mild headache (50 mg) (one subject), and moderate headache associated with vomiting (50 mg) (one subject). There were no clinically significant changes in vital signs, laboratory or ECG parameters.

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Over the investigated dose range from 22 to 50 mg (factor 2.27 increase) after a standardized breakfast, PHA121 showed dose-proportional PK with a 2.4-fold increase for mean Cmax and AUC0-24h. Administration of PHA121 after a standardized breakfast resulted in 40-50% decrease in Cmax without a change in AUCinf as compared to administration under fasting conditions. As a result, C12h and C24h plasma concentration for PHA121 were higher under fed conditions. These observations support the potential use of this formulation for initial studies in a prophylactic setting by dosing with food.

|  | 22 mg of PHA121 Fasted |  | 22 mg of PHA121 HCHF |  | 22 mg of PHA121 Standard Meal
C12h’ ng/mL |  | 8.3 |  | 19.6 |  | 17.3
C24h’ ng/mL |  | 1.1 |  | 5.4 |  | 2.5
Cmax’ ng/mL |  | 213 |  | 145 |  | 115
AUC0-24h’ ng.h/mL |  | 671 |  | 966 |  | 750
Tmax’ h |  | 0.25-1.02 |  | 2.00-3.00 |  | 0.50-4.00
t1/2’ h |  | 5.6 |  | 5.3 |  | 4.3

PHA121-C004 (DDI-CYP3A4 inhibitor, itraconazole, interaction)

Cytochrome P450 3A4 (CYP3A4) plays an important role in the metabolism of PHA121. PHA121-C004 was designed as an open-label, single sequence crossover drug-drug interaction trial to evaluate the effect of multiple doses of itraconazole, a potent CYP3A4 inhibitor, at steady-state on the PK of a single dose of PHA121 in healthy subjects. The primary objective of this study was to determine the effect of multiple doses of the strong CYP3A4 inhibitor itraconazole on the PK of PHA121 in healthy adult subjects. The secondary objective of this study was to evaluate the safety and tolerability of PHA121 alone and in combination with multiple doses of the CYP3A4 inhibitor itraconazole in healthy adult subjects. The study has been completed in 13 subjects and PHA121 was well tolerated with no drug-related adverse events reported. Preliminary analyses show that the exposure of PHA121 increased when co-administered with itraconazole, as expected from in vitro data showing that PHA121 is a substrate of CYP3A4. Other potential drug-drug interactions will be further assessed by the PHA121-C005 cocktail interaction study and in in vitro assays recommended by FDA guidance.

PHA121-C006 (MAD)

PHA121-C006 was a randomized, double-blind, placebo-controlled, multiple ascending dose trial to examine the safety, tolerability and PK of PHA121 in healthy subjects, which demonstrated PHA121’s pharmacokinetics and tolerability. The trial included 38 subjects and four cohorts, ranging from 12 to 50 mg, of healthy subjects who were studied sequentially. Within each cohort, eight subjects received PHA121 and two subjects received placebo, except for the final cohort with six subjects receiving PHA121 and two subjects

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receiving placebo. The trial evaluated multiple ascending doses of twice daily for 10 days to establish safety and tolerability and to assess the PK characteristics of PHA121 after standard caloric meals. PHA121 was supplied as an oral solution.

The study showed PHA121 was well tolerated at all doses studied (including up to the highest dose of 50 mg twice daily (BID)), with approximately dose-proportional exposure. During the study, there have been no SAEs or severe treatment-emergent adverse events, or TEAEs, reported. All reported TEAEs were mild in intensity and resolved completely. There were no clear differences between the different dosing regimens vs. placebo with respect to the total TEAEs and the frequency of TEAEs reported for the different system organ classes. Lab safety, vital signs, and ECG parameters remained well within normal limits in all subjects. The pharmacokinetic profile suggests that therapeutic drug levels of PHA121 were achieved in day 1 and steady-state plasma concentrations were reached within 72 hours.

Future Development Path

We intend to develop PHA121 for on-demand and prophylactic indications in parallel using two different product formulations, with clinical trials in the on-demand setting to commence first and provide critical data for further development for the prophylaxis indication.

RAPIDe-1 On-Demand

The availability of an immediate-release soft-capsule formulation, PHVS416, provides a good pharmacokinetic profile for on-demand treatment: rapid oral absorption independent of fed status resulting in almost immediate onset of action with longer expected duration of efficacy than subcutaneous injections of icatibant. We have observed in preclinical animal studies that the PHVS416 soft capsule provides the same pharmacokinetic profile as the solution formulation we used in Phase 1 trials.

We are planning an on-demand Phase 2 clinical trial in HAE patients, RAPIDe-1, that will evaluate angioedema symptom relief within four hours using different doses of PHVS416 versus placebo while treating acute attacks of patients with HAE Types 1 and 2. The primary endpoint will be the change in composite visual analogue scale, or composite VAS, a measure of symptom relief, at four hours post-dose. Composite and individual VAS, mean symptom complex severity, or MSCS, and treatment outcome score, or TOS, will be assessed up to 48-hours post-dose. We anticipate commencing the clinical trial in 2021 and plan to enroll approximately 54 patients from approximately 30 sites in Canada and certain European countries. We expect data in 2022.

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Prophylaxis Trials

Currently there is no bradykinin B2-receptor antagonist available for HAE prophylaxis. Icatibant has a very short half-life and would require multiple injections each day, making it generally unsuitable for prophylactic use, especially with injection site pain reported for most patients.

Unlike on-demand use, prophylaxis requires maintenance of drug concentration over long periods of time – rapid absorption is unnecessary. In order to project a potential dose for use in prophylactic trials using our projected dose from the bradykinin challenge model (an acute treatment model), we relied on a similar acute-to-prophylactic extrapolation utilized for products in the plasma kallikrein mechanism. Ecallantide is a polypeptide inhibitor of plasma kallikrein used for treatment of attacks. Similarly to icatibant, the short half-life of ecallantide makes it generally unsuitable for use in prophylaxis.

Lanadelumab-flyo is a monoclonal antibody with the same target as ecallantide but with higher potency and longer half-life. Lanadelumab-flyo is used for prevention of attacks. Clinical trials and published literature correlate the steady-state concentrations of lanadelumab-flyo (relative to its EC50) to the observed prophylactic control of attacks. Based on the observed potency of PHA121 in the bradykinin challenge, we believe we can utilize a similar concentration-above-EC50 approach to predict the required exposure of PHA121 to control attacks prophylactically.

We believe we can achieve the concentrations desired for prophylactic activity with twice-daily dosing of the PHVS416 soft capsules. Therefore, in addition to the RAPIDe-1 on-demand trial, we are also planning clinical trials of PHVS416 to evaluate its efficacy and safety for preventing HAE attacks (prophylaxis). These include an evaluation of patients randomized to placebo or active doses for a treatment period with the primary objective to assess the safety profile of PHVS416 dose regimens for prophylactic treatments in HAE patients.

We also intend to conduct a registration-directed randomized, placebo-controlled evaluation in HAE prophylaxis to provide the key efficacy and safety evaluation of prophylactic treatment. We anticipate that PHVS719, as described below, will be included in this pivotal trial, with doses selected based on the PK performance of PHVS719 in Phase 1 trials. We also expect that the data from RAPIDe-1 will support the final dose selection for the prophylactic trials. Additional trials may required by the FDA, EMA or other regulators even if we receive positive data from RAPIDe-1.

In order to provide a differentiated product featuring more consistent exposure of PHA121 for the prophylactic setting, we are developing an extended-release, or XR, formulation (PHVS719) that will feature continuous slow release maintaining PHA121 concentrations above the levels we predict to provide protection against attacks. PHA121 has demonstrated properties favorable to the development of XR formulations, and we believe that we will begin human pharmacokinetics trials with PHVS719 in 2021 to enable use of this product candidate in the pivotal prophylactic trial.

We believe that we have already identified a promising prototype formulation for extended release. The nonlinear mixed-mode model from our BK challenge trial allows us to simulate different formulations by changing certain formulation-related inputs, such as the in-vitro release rate, while utilizing the experimentally determined properties of PHA121, such as half-life, potency, and effect on BK-induced hemodynamic parameters (surrogate assessment). As shown in the graphs below, utilizing this mathematical model, we simulated the human PK/PD parameters of a prototype extended-release formulation, based on initial in vitro dissolution experiments. These modeling calculations suggest that this prototype may already support twice-a-day dosing in patients, and we are continuing to refine our formulation with the goal of achieving once-a-day dosing. We expect to conduct a bridging study between our formulation of PHVS719 and PHVS416 in a Phase 1 clinical trial starting in 2021.

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In addition, we also plan to run an open-label extension study in the prophylactic setting with both rollover and non-rollover subjects to collect longer duration safety data, which will be further discussed with FDA and EMA.

Intellectual Property

We seek to protect and enhance the proprietary technologies, inventions, product candidates, methods of manufacture and methods of usage of our product candidates, and improvements thereof that are commercially important to the development of our business. We protect our proprietary intellectual property by, among other things, filing patent applications in the United States and internationally covering our proprietary technologies, inventions, product candidates, methods of manufacture and use, and improvements that are important to the development and implementation of our business. We will also seek to rely on regulatory protection afforded by orphan drug designations, inclusion in expedited development and review, data exclusivity, market exclusivity and patent term extensions where available.

As of February 1, 2021, we own one U.S. patent that expires on November 23, 2038 and 32 pending patent applications worldwide, including one pending U.S. continuation application, 29 pending non-U.S. applications, including applications in Europe and Japan, and two pending PCT applications. The U.S. patent and 31 of these pending patent applications contain composition-of-matter claims to the PHA121 small molecule and derivatives thereof; PHA121 is the active pharmaceutical ingredient in, and therefore extends our patent applications to, our PHVS416 and PHVS719 product candidates. Each such patent application can generally be categorized into one of three patent families: (1) those relating to the novel bradykinin-B2-receptor antagonists, (2) those relating to the cyclic bradykinin-B2-receptor antagonists, and (3) those relating to the new cyclic bradykinin-B2-receptor antagonists. One pending European patent application contains claims directed to the use of PHA121 in on-demand treatment of HAE and in prophylaxis for HAE, and accordingly extends the patent applications to methods of use of the PHVS416 and PHVS719 product candidates. Not accounting for any patent term adjustment, regulatory extension or terminal disclaimers, and assuming that all annuity and/or maintenance fees are paid timely, these patent applications, if granted, will not expire until November 24, 2038. We also rely upon trade secrets that may be important to the development of our business. Trade secrets are difficult to protect and provide us with only limited protection. There can be no assurance that any of our pending patent applications will issue or that we will benefit from any patent term extension or favorable adjustment to the term of any patents that may be issued in the future.

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The term of individual patents depends upon the legal term for patents in the countries in which they are obtained. In most countries in which we have filed, including the U.S., the patent term is 20 years from the earliest filing date of a non-provisional patent application. In the U.S., a patent’s term may be lengthened by patent term adjustment, which compensates a patentee for administrative delays by the USPTO in examining and granting a patent, or may be shortened if a patent is terminally disclaimed over an earlier filed patent. The term of a patent that covers a drug or biological product may also be eligible for patent term extension when FDA approval is granted for a portion of the term effectively lost as a result of the FDA regulatory review period, subject to certain limitations and provided statutory and regulatory requirements are met. Any such patent term extension can be for no more than five years, only one patent per approved product can be extended, the extension cannot extend the total patent term beyond 14 years from approval and only those claims covering the approved drug, a method for using it or a method for manufacturing, it may be extended. We may not receive an extension if we fail to exercise due diligence during the testing phase or regulatory review process, fail to apply within applicable deadlines, fail to apply prior to expiration of relevant patents or otherwise fail to satisfy applicable requirements. Moreover, the length of the extension could be less than we request. In the future, if and when our product candidates receive approval from the FDA or foreign regulatory authorities, we expect to apply for patent term extensions on issued patents we may obtain in the future covering PHA121, depending upon the length of the clinical trials for each product and other factors.

As with other biotechnology and pharmaceutical companies, our ability to establish and maintain our proprietary and intellectual property position for our product candidates will depend on our success in obtaining effective patent claims and enforcing those claims if granted. There can be no assurance that any of our current or future patent applications will result in the issuance of patents or that our future issued patents (if any) will provide meaningful protection of our product candidates or technology. For more information regarding the risks related to our intellectual property, see the section entitled “Risk Factors—Risks Related to Our Intellectual Property.”

License Agreement

On March 31, 2016, we entered into a license agreement (the “AnalytiCon License”) and a research agreement with AnalytiCon to collaborate for the development of an orally available bradykinin B2 receptor antagonist. Pursuant to the AnalytiCon License, we acquired a worldwide, exclusive license from AnalytiCon to use (i) a certain proprietary substance class of bradykinin B2 receptor antagonist with the potential of oral activity (“OB2RA”) and (ii) any derivatives, improvements, analogs, isomers, metabolites, or conjugates therefrom (together “OB2RA Class”), in each case, for the purpose of developing, manufacturing and marketing compounds on a global basis from the OB2RA Class for the treatment of, among others, hereditary angioedema. Certain rights associated with PHA121, PHVS416 and PHVS719 are subject to the AnalytiCon license agreement. In consideration for the license, we paid AnalytiCon a non-refundable up-front payment of €250,000.

Under the AnalytiCon License, we are required to pay AnalytiCon one-time payments in an aggregate amount of up to €11.4 million upon the achievement of certain development, regulatory, and sales milestones. To date, we have paid AnalytiCon an aggregate amount of €650,000 (€250,000 up-front plus €400,000 in milestone payments), and €11 million in aggregate potential milestone payments remain outstanding. In addition, we will be required to pay AnalytiCon low to medium single-digit tiered royalties on direct or indirect net sales of licensed products. The royalties that we are required to pay AnalytiCon under this agreement may be reduced on a country-by-country and product-by-product basis if sales of a generic version of a product account for 1% or more of the relevant market.

Our agreement with AnalytiCon will expire upon the expiry of the last patent of the licensed intellectual property. Not accounting for any regulatory extension or terminal disclaimers, and assuming that all annuity and/or maintenance fees are paid timely, the applicable expiration date is November 23, 2038. Either party may terminate the agreement prematurely for cause, in particular, for the other party’s (i) uncured material breach, (ii) bankruptcy or insolvency, or (iii) challenge to the validity or ownership of the intellectual property rights relating

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to the compounds that form the object of the collaboration with AnalytiCon. If AnalytiCon were to (a) terminate the AnalytiCon License for cause and (b) exercise contractual remedies available to it thereunder, then we could be required to grant to AnalytiCon an exclusive worldwide license to our intellectual property generated under the collaboration with AnalytiCon for use in all applications, including HAE. In addition, we could be prevented from competing with AnalytiCon until five years after the commercial launch of any product containing a compound from the OB2RA Class.

Manufacturing and Supply

We currently have a single contract CDMO for the production of PHA121 API. A robust and scalable synthetic route has been established. All raw materials can be purchased from multiple suppliers. We plan to identify and qualify a second CDMO. We also collaborate with a leading CDMO for the manufacturing of the on-demand treatment product PHVS416. With the same CDMO we are currently optimizing the prophylactic treatment product PHVS719. The CDMO is also responsible for packaging and worldwide distribution of commercial drug products.

Sales and Marketing

The Pharvaris team, including its founders, have experience developing and commercializing drug products for rare diseases including HAE specifically. We intend to develop a fully integrated sales and marketing organization ahead of marketing approval for PHA121. Even though HAE is a competitive market, orphan product companies have demonstrated successful first launches with excellent preparation and execution. We believe that our products will provide patients with significant new treatment options, and we will evaluate options to optimize the commercial opportunity.

Competition

The biotechnology industry is characterized by rapidly advancing technologies, intense competition and a strong emphasis on intellectual property. We face competition from different sources, including from academic centers as well as from a number of large and specialty biotechnology and pharmaceutical companies.

Currently, there are several licensed therapies for HAE, including the following:

| • |  | FIRAZYR: The BK receptor antagonist FIRAZYR (icatibant) is approved by the FDA in the U.S. and by regulators globally for the treatment of acute attacks and is administered by subcutaneous administration. Six generic forms of icatibant have been approved in the U.S. since July 2019 and more may be approved in the future.

| • |  | C1-INH: C1-INH replacement therapy is available in the U.S. and globally as an acute therapy (BERINERT CINRYZE, and CETOR) and as a prophylactic therapy (HAEGARDA/BERINERT 2000/3000 and CINRYZE). These therapies are dosed subcutaneously and intravenously. Recombinant C1-INH (Ruconest) is also available in the U.S. and in Europe as an acute therapy.

| • |  | Kallikrein Inhibitors: KALBITOR (ecallantide) is a specific recombinant plasma kallikrein inhibitor that is dosed subcutaneously by healthcare providers in the U.S. to treat acute HAE attacks. TAKHZYRO (lanadelumab-flyo) is a monoclonal antibody approved in the U.S. and a growing number of countries for prophylaxis of HAE attacks and can be self-administered as a subcutaneous injection. ORLADEYO (berotralstat) is an kallikrein inhibitor that was approved in the U.S. in the fourth quarter of 2020 and is dosed orally once-daily for the prevention of HAE attacks.

| • |  | Other Medications: Prophylactic administration of synthetic attenuated androgens (generically available as danazol or stanozolol) has been utilized to reduce the frequency or severity of attacks. However, long-term use of danazol or stanozolol may result in liver damage, virilization and arterial hypertension. Six-month liver function tests, annual lipid profiles, and biennial hepatic ultrasound are recommended for patients on chronic androgen therapy.

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We are also aware of a number of HAE therapies in clinical development. Currently, there are three orally delivered plasma kallikrein inhibitors being developed clinically: Kalvista’s KVD900 for acute treatment and KVD824 for prophylactic treatment and Attune’s ATN-249 for prophylactic treatment. Additionally, CSL is developing garadacimab, an anti-factor XIIa mAb for prophylactic treatment, which is delivered subcutaneously or intravenously and Ionis’s IONIS-PKK-LRx, an antisense oligonucleotide inhibitor of prekallikrein for prophylactic treatment, which is delivered subcutaneously.

Many of our competitors and potential competitors have substantially greater scientific, research and product development capabilities as well as greater financial, manufacturing, commercialization and human resources than we do. In addition, there is intense competition on the clinical trial sites and the enrollment of HAE patients for clinical trials. Many specialized biotechnology firms have formed collaborations with large, established companies to support the research, development and commercialization of products that may be competitive with ours, and many other biotech and pharmaceutical companies are competing for the same potential employees. Accordingly, our competitors may be more successful than we may be in developing, manufacturing, commercializing their products and in achieving widespread market acceptance.

Government Regulation and Product Approval

In each country where we conduct our research and development, manufacture our products and intend to market our product candidates, if approved, we must comply with laws and regulations, including regulations issued by regulatory agencies and by other national or supra-national regulatory authorities, or collectively, the Competent Authorities, as well as industry standards, that govern nearly all aspects of our activities. Among others, the FDA, the EMA and the national Competent Authorities of each Member State of the European Union are the key regulatory agencies that exercise oversight over all aspects of our products.

Our pharmaceutical product candidates are subject to substantial requirements that govern, among other things, their research, development, testing, manufacturing, quality control, approval, safety, efficacy, labelling, storage, record keeping, commercialization, distribution, import and export, post-approval monitoring and reporting, advertising, promotion, reimbursement and pricing. The process of maintaining continued compliance with the regulatory requirements requires the expenditure of substantial amounts of time and money.

The nonclinical and clinical development paths for product candidates are broadly similar in the European Union and the United States.

Nonclinical Studies

Development of the product candidates starts with nonclinical studies, which include laboratory tests to develop a robust product manufacturing process, including formulation and stability. In addition, nonclinical studies are conducted to evaluate the mode of action and in vivo tests are conducted until adequate proof of safety is established (e.g., animal testing for reproductive toxicity and carcinogenicity). The conduct of the nonclinical tests and formulation of the compounds for testing must comply with regulations and requirements set by the Competent Authorities, including compliance with GLP. Upon successful completion of nonclinical studies, clinical development can be initiated.

Clinical Studies

Prior to obtaining approval to commercialize a drug candidate, sponsors typically must demonstrate with substantial evidence from well-controlled clinical trials, and to the satisfaction of the Competent Authorities, that such drug candidates are safe and effective for their intended uses. Clinical trials involve the administration of the investigational product to healthy volunteers or subjects under the supervision of a qualified investigator. Clinical trials must be conducted: (i) in compliance with the requirements of the Competent Authorities; (ii) in compliance with GCP, an international standard meant to protect the rights and health of subjects and to define

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the roles of clinical trial sponsors, administrators, and monitors; as well as (iii) under protocols detailing the objectives of the trial, the parameters to be used in monitoring safety, and the effectiveness criteria to be evaluated. The number of clinical studies and trials that will be required for approval varies depending on, e.g., the drug candidate and the disease or condition that the drug candidate is designed to address.

Prior to initiating clinical trials, a request for clinical trial authorization (national Competent Authorities in the European Union) or an Investigational New Drug, or IND, application in the United States must be submitted to the relevant Competent Authorities. These submissions must be supported by an investigational medicinal product dossier or equivalent as detailed in applicable regulations and guidance documents from the Competent Authorities. Extensive information about the proposed clinical studies, as well as the results of the nonclinical tests, together with manufacturing information and analytical data, are included in these submissions. In the United States, a 30-day waiting period after the submission of an IND is required prior to the commencement of clinical testing in humans. If the FDA, has neither commented on nor questioned the IND within this 30-day period, the clinical trial proposed in the IND may begin.

Manufacturing of investigational products is subject to authorization and must be carried out in accordance with cGMP. Furthermore, a clinical trial may only be started after an IRB (United States) or a competent Ethics Committee (European Union) has issued a favorable opinion on the clinical trial application.

During all phases of clinical development, Competent Authorities require extensive monitoring and auditing of all clinical activities, clinical data and clinical trial investigators. Annual progress reports detailing the progress of the clinical trials must be submitted to the Competent Authorities. Important new safety information, that suggests a significant risk for human patients, or any clinically important increase in the rate of a serious suspected adverse reaction over that listed in the protocol or investigator brochure, must also be provided to clinical investigators.

The Competent Authorities, sponsor or its data safety monitoring board may suspend or terminate a clinical trial at any time on various grounds, including a finding that the research exposes patients to an unacceptable health risk. Similarly, an IRB or Ethics Committee can suspend or terminate approval of a clinical trial at its institution if the clinical trial is not being conducted in accordance with the institutional requirements or if the drug candidate has been associated with unexpected serious harm to patients.

The following section describes specific regulatory regimes and regulations applicable in certain jurisdictions.

United States

U.S. Food and Drug Administration

In the United States, FDA regulates drugs under the Federal Food, Drug, and Cosmetic Act, or FFDCA, and implementing regulations. These laws, govern, among other things, the research, development, testing, manufacture, storage, recordkeeping, approval, labeling, promotion and marketing, distribution, post-marketing monitoring and reporting, sampling, and import and export of drug products. The process of obtaining regulatory approvals and the subsequent compliance with the many statutory and regulatory provisions require the expenditure of substantial time and financial resources. Failure to comply with applicable U.S. requirements may subject a company to a variety of administrative or judicial sanctions, such as clinical hold, FDA refusal to approve pending regulatory applications, warning or untitled letters, product recalls, product seizures, total or partial suspension of production or distribution, injunctions, fines, civil penalties, and criminal prosecution.

The FDA Approval Process

Clinical trials to support NDAs for marketing approval are typically conducted in three sequential phases, but the phases may overlap. In Phase 1, the initial introduction of the product candidate is usually into healthy

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human subjects, and the product candidate is tested to assess metabolism, pharmacokinetics, pharmacological actions, side effects associated with increasing doses, and, if possible, early evidence on effectiveness. Phase 2 usually involves trials in a limited patient population to determine the effectiveness of the product candidate for a particular indication, dosage tolerance, and optimal dosage, and to identify common adverse effects and safety risks. If a product candidate demonstrates evidence of effectiveness and an acceptable safety profile in Phase 2 evaluations, Phase 3 trials are undertaken to obtain additional information about clinical efficacy and safety in a larger number of subjects, typically at geographically dispersed clinical trial sites, to permit the FDA to evaluate the overall benefit-risk relationship of the product candidate and to provide adequate information for the labeling of the product candidate. In most cases, the FDA requires two adequate and well-controlled Phase 3 clinical trials to demonstrate the efficacy of the product candidate. A single Phase 3 trial may be sufficient in certain circumstances.

During the development of a new product candidate, sponsors are given opportunities to meet with the FDA at certain points; specifically, prior to the submission of an IND, at the end of Phase 2 and before an NDA is submitted. Meetings at other times may be requested. These meetings can provide an opportunity for the sponsor to share information about the data gathered to date and for the FDA to provide advice on the next phase of development. Sponsors typically use the meeting at the end of Phase 2 to discuss their Phase 2 clinical results and present their plans for the pivotal Phase 3 clinical trials that they believe will support the approval of the new product candidate.

The results of drug candidate development, nonclinical testing, clinical trials and proposed labeling are submitted to the FDA as part of the New Drug Application, or NDA. An NDA must include all information regarding and data from pertinent nonclinical and clinical studies, including negative or ambiguous results as well as positive findings, together with detailed information relating to the drug’s chemistry, manufacturing and controls. The FDA will accept, as support for an IND or NDA a well-designed, well-conducted, non-IND foreign clinical trial if it was conducted in accordance with GCP and the FDA is able to validate the data from the trial through an on-site inspection, if necessary. Regulatory applications based solely on foreign clinical data meeting these criteria may be approved if the foreign data are applicable to the U.S. population and U.S. medical practice, the trials have been performed by clinical investigators of recognized competence, and the data may be considered valid without the need for an on-site inspection by FDA or, if FDA considers such an inspection to be necessary, FDA is able to validate the data through an on-site inspection or other appropriate means. Failure of an application to meet any of these criteria may result in the application not being approvable based on the foreign data alone. To support marketing approval and authorization, the data submitted must be sufficient in quality and quantity to establish the safety and effectiveness of the investigational drug to the FDA’s satisfaction.

The cost of preparing and submitting an NDA is substantial. The submission of most NDAs is additionally subject to a substantial application user fee payment to FDA, and the manufacturer and/or sponsor under an approved NDA are also subject to certain annual program user fees. The FDA typically increases these fees annually.

The FDA has 60 days from its receipt of an NDA to determine whether it will accept the application for filing based on the agency’s threshold determination that the application is sufficiently complete to permit substantive review. The FDA may refuse to file any NDA that it deems incomplete or not properly reviewable at the time of submission and may request additional information. In this event, the NDA must be resubmitted with the additional information and the resubmitted application also is subject to review before the FDA accepts it for filing. Once the FDA accepts the filing, the FDA begins an in-depth review. The FDA has agreed to certain performance goals in the review of NDAs. Under the Prescription Drug User Fee Act, the FDA has a goal of responding to standard review NDAs within ten months after the 60-day filing review period, but this timeframe is often extended. The FDA reviews most applications for standard review drugs within twelve months. The review process may be extended by the FDA for three additional months to consider certain late-submitted information, or information intended to clarify information already provided in the submission. This late-submitted information is typically requested by FDA.

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The FDA may also refer applications for novel drugs or product candidates that present difficult questions of safety or efficacy, to an FDA Advisory Committee. An Advisory Committee is an outside panel that typically includes clinicians and other experts in the field that will review and evaluate the questions posed by FDA, and provide recommendations, sometimes including whether the FDA should approve the application. The FDA is not bound by the recommendation of an Advisory Committee, but it generally follows such recommendations.

Before approving an NDA, the FDA will typically inspect one or more clinical study sites to assure compliance with GCP. The FDA may also inspect one or more nonclinical study sites. In addition, the FDA will inspect the facility or the facilities involved in the manufacture of the drug to determine if the facilities, processes and quality are compliant with cGMP. The FDA will not approve an NDA unless compliance with cGMP is satisfactory.

After the FDA evaluates the NDA and the manufacturing facilities, it issues either an approval letter or a complete response letter. A complete response letter indicates that the FDA has completed its review of the NDA, and the agency has determined that it will not approve the application in its present form. A complete response letter generally outlines the deficiencies in the NDA, which may be minor or substantial, and may delineate the requirements needed to successfully progress the NDA to approval. This may require substantial additional clinical data and/or other significant, expensive, and time-consuming requirements related to clinical studies, preclinical studies and/or manufacturing. If a complete response letter is issued, the applicant may either resubmit the NDA, addressing the deficiencies identified in the letter, or withdraw the application. The FDA has committed to reviewing resubmissions of the NDA addressing such deficiencies in two or six months, depending on the type of information included. Even if such data is submitted, the FDA may ultimately decide that the NDA does not satisfy the criteria for approval.

An approval letter authorizes commercial marketing of the drug, with specific prescribing information for specific indications. Even if FDA approves the NDA, the approval may be significantly limited to specific indications and dosages or the indications for use may otherwise be limited, which could restrict the commercial value of the product. Further, the FDA may require that certain contraindications, warnings or precautions be included in the product labeling. The FDA may impose restrictions and conditions on product distribution, prescribing, or dispensing in the form of a risk evaluation and mitigation strategy, or REMS, or otherwise limit the scope of any approval. REMS can include medication guides, communication plans for healthcare professionals, and elements to assure safe use, or ETASU. ETASU can include, but are not limited to, special training or certification for prescribing or dispensing, dispensing only under certain circumstances, special monitoring, and the use of patient registries. The requirement for a REMS can materially affect the potential market and profitability of the product. In addition, the FDA may require confirmatory post-marketing trials, sometimes referred to as “Phase 4” clinical trials, designed to further assess a product’s safety and effectiveness, and testing and surveillance programs to monitor the safety of approved products that have been commercialized.

Expedited Approval in the U.S.

The FDA has a number of programs that are intended to facilitate and expedite development and review of new drugs to address unmet medical need in the treatment of a serious or life threatening condition. These are: Fast Track Designation, Breakthrough Therapy Designation, Accelerated Approval and Priority Review Designation.

Fast Track Designation can be requested early in the development process, if evidence of activity in a nonclinical model, a mechanistic rationale or pharmacologic data demonstrates the potential to address an unmet medical need. In the later stages of development, available clinical data should demonstrate the potential to address an unmet medical need. Fast Track Designation provides opportunities for applicants to have frequent interactions with the relevant FDA review teams. In addition, a fast track product can be eligible for priority review if supported by clinical data at the time of NDA submission. If the FDA determines that a fast track product may be effective after preliminary evaluation of the NDA, it may consider reviewing portions of a

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marketing application before the sponsor submits the complete application. Fast Track Designation can be requested when the IND is first submitted or at any time thereafter but before receiving approval of the NDA. As a practical matter, the FDA should ordinarily receive a Fast Track Designation request no later than the sponsor’s pre-NDA meeting with the agency because many of the features of Fast Track Designation will not apply after that time. The FDA will respond to Fast Track Designation requests within 60 calendar days of receipt of the request.

The FDA’s Breakthrough Therapy Designation is intended to expedite the development and review of drugs which may demonstrate substantial improvement over available therapies on one or more clinically significant endpoints, such as substantial treatment effects observed early in clinical development. A drug that receives Breakthrough Therapy Designation is eligible for all Fast Track Designation features, intensive guidance from FDA on an efficient drug development program, beginning as early as Phase 1, and organizational commitment involving senior managers. Breakthrough Therapy Designation is requested by the manufacturer. A sponsor needs to submit a request to the agency for Breakthrough Therapy Designation, but in some cases the FDA may suggest that the sponsor consider submitting a request after reviewing submitted data and information (including preliminary clinical evidence), the FDA thinks the drug development program may meet the criteria for Breakthrough Therapy Designation; and the remaining drug development program can benefit from the designation. Ideally, a Breakthrough Therapy Designation request should be received by the FDA no later than the End-of-Phase 2 meetings if any of the features of the designation are to be obtained. The FDA will respond to Breakthrough Therapy Designation requests within 60 days of receipt of the request.

Accelerated approval may be granted for a product based upon a determination that the product has an effect on a surrogate endpoint that is reasonably likely to predict clinical benefit, or on a clinical endpoint that can be measured earlier than irreversible morbidity or mortality, or IMM, that is reasonably likely to predict an effect on IMM or other clinical benefit, taking into account the severity, rarity or prevalence of the condition and the availability or lack of alternative treatments. For drugs granted accelerated approval, post-marketing confirmatory trials will be required to verify and describe the anticipated effect on the IMM or other clinical benefit. The accelerated approval pathway has been used primarily in settings in which the disease course is long and an extended period of time would be required to measure the intended clinical benefit of a drug. Accelerated approval is also potentially useful in acute disease settings where the intended clinical benefit can be demonstrated only in a very large study because the clinical event that would need to be evaluated to demonstrate clinical benefit occurs rarely.

The FDA may withdraw approval of a drug or indication approved under the accelerated approval pathway if e.g., the confirmatory trial fails to verify the predicted clinical benefit, the evidence demonstrates that the product is not shown to be safe and effective under the conditions of use, the applicant fails to conduct the post-approval trials with due diligence or the applicant disseminates false or misleading promotional materials related to the product.

A priority review designation is intended to direct overall attention and resources to the evaluation of an application for a drug that treats, prevents or is used in the diagnosis of a serious condition and if approved would provide a significant improvement in safety or effectiveness. Eligibility for priority review is determined by the FDA at the time of an NDA or efficacy supplement filing. Where an application receives a priority review designation, the FDA’s goal is to take action on the marketing application within six months of receipt (as compared to within 10 months under standard review). The FDA determines whether an application qualifies for priority review (versus standard review) for every application it reviews, not just when priority review is requested by the applicant. However, an applicant may expressly request priority review. The FDA will inform the applicant in writing of a priority review designation by day 60 of the review.

Orphan Designation

An orphan drug designation qualifies the manufacturer for certain tax credits and may lead to market exclusivity for seven years following the date of the drug’s approval by the FDA. The FDCA provides that a drug

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shall be designated as an orphan drug if its manufacturer can establish that the drug is for a condition that affects fewer than 200,000 individuals in the United States or when there is no reasonable expectation that the cost of developing and making available the drug for the disease or condition will be recovered from sales of the drug in the United States. More than one manufacturer may receive orphan drug designation for the same drug for the same rare disease or condition, but each manufacturer seeking orphan drug designation must file a complete request for designation.

In the United States, a manufacturer may request orphan drug designation of a previously unapproved drug or new orphan indication for a different use for an already marketed drug. In addition, a manufacturer of a drug that is otherwise the same drug as an already approved orphan drug may seek and obtain orphan drug designation for the subsequent drug for the same rare disease or condition if it can present a plausible hypothesis that its drug may be clinically superior to the first drug. FDA may grant the drug orphan exclusivity upon approval, if clinical superiority is demonstrated. Orphan drug exclusivity cannot otherwise be granted for the same drug made by another manufacturer for the same indication during the market exclusivity period unless the original manufacturer consents or the original manufacturer is unable to ensure the availability of sufficient quantities of the drug to meet the needs of persons with the disease or condition for which the drug was designated.

An application for orphan drug designation can be made any time prior to the filing of an application for approval to market the product. The period of orphan exclusivity, if granted, begins on the date that the marketing application is approved. The exclusivity is limited to the indication for which the drug has been approved.

Post-Marketing Requirements

FDA may withdraw approval of an NDA if compliance with regulatory requirements is not maintained or if problems occur after the product reaches the market. Later discovery of previously unknown problems with a product may result in restrictions on the product, product recalls or even complete withdrawal of the product from the market.

After approval, some types of changes to the approved product, such as adding new indications, manufacturing changes and additional labeling claims, are subject to further FDA review and approval; such changes may require the approval of a new NDA or an NDA supplement. An NDA supplement for a new indication typically requires clinical data similar to that in the original application, and the FDA uses the same procedures and actions in reviewing NDA supplements as it does in reviewing new NDAs. As with new NDAs, the FDA often significantly extends the review process with requests for additional information or clarification. In addition, the FDA may, under some circumstances, require testing and surveillance programs to monitor the effect of approved products that have been commercialized, and the FDA under some circumstances has the power to prevent or limit further commercialization of a product based on the results of these post-marketing programs.

In addition, drug products manufactured or distributed pursuant to FDA approvals, are subject to additional and continuing regulation by the FDA, including, among other things:

| • |  | record-keeping requirements;

| • |  | reporting of adverse experiences associated with the product;

| • |  | providing the FDA with updated safety and efficacy information;

| • |  | distribution of drug samples;

| • |  | notifying the FDA and gaining its approval of specified manufacturing or labeling changes;

| • |  | drug establishment registration and drug listing requirements; and

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| • |  | complying with FDA promotion and advertising requirements, which include, among other things, standards for direct-to-consumer advertising, restrictions on promoting products for uses or in patient populations that are not described in the product’s approved labeling, limitations on industry-sponsored scientific and educational activities and requirements for promotional activities involving the internet.

Drug manufacturers are subject to periodic unannounced inspections by the FDA and certain state agencies for compliance with cGMP requirements and other laws. There are strict regulations regarding changes to the manufacturing process, and, depending on the significance of the change, it may require prior FDA approval before it can be implemented. FDA regulations also require investigation and correction of any deviations from cGMP and impose reporting and documentation requirements upon drug manufacturers. Drug manufacturers must also satisfy the product tracing, verification and reporting requirements in the Drug Quality and Security Act and have procedures in place to identify and properly handle suspect and illegitimate product. Accordingly, manufacturers must continue to expend time, money and effort in the area of production, distribution and quality control to maintain compliance with cGMP and other aspects of regulatory compliance.

Sponsors of clinical trials of FDA-regulated products are required to register and disclose certain clinical trial information. Information related to the product, patient population, phase of investigation, trial sites and investigators, and other aspects of the clinical trial is then made public as part of the registration. Sponsors are also obligated to disclose the results of their clinical trials after completion. Disclosure of the results of these trials can be delayed in certain circumstances for up to two years after the date of completion of the trial. Competitors may use this publicly available information to gain knowledge regarding the progress of development programs.

Although rare, the FDA may withdraw approval of an NDA if a company does not comply with its extensive regulatory requirements or if significant safety, efficacy or manufacturing issues arise after the drug reaches the market. More typically, if a company or the FDA discovers previously unknown problems with a drug, including adverse events of unanticipated severity or frequency or issues with manufacturing processes, the FDA may revise the approved labeling to add new safety information; require additional clinical studies to assess new safety risks; or impose distribution or other restrictions under a REMS program. Other potential consequences may include:

| • |  | restrictions on the commercialization or manufacturing of the drug, market withdrawals or recalls;

| • |  | fines, warning letters or holds on post-approval clinical studies;

| • |  | the FDA refusal to approve pending NDAs or supplements to approved NDAs;

| • |  | drug seizure or detention, or refusal to permit the import or export of drugs; or

| • |  | injunctions or the imposition of civil or criminal penalties.

From time to time, legislation is drafted, introduced and passed in Congress that could significantly change the statutory provisions governing the testing, approval, manufacturing and marketing of products regulated by the FDA. In addition to new legislation, FDA regulations and policies are often revised or interpreted by the agency in ways that may significantly affect our business and product candidates. It is impossible to predict whether further legislative changes will be enacted or whether FDA regulations, guidance, policies or interpretations will be changed or what the effect of such changes, if any, may be.

U.S. Patent Term Restoration

A patent claiming a new product may be eligible for a limited patent term extension under the Hatch-Waxman Act, which permits a patent restoration of up to five years for patent term lost during product development and FDA regulatory review. The restoration period granted on a patent covering a product is typically one-half the time between the effective date of a clinical investigation involving human beings is begun

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and the submission date of an application, plus the time between the submission date of an application and the ultimate approval date. Patent term restoration cannot be used to extend the remaining term of a patent past a total of 14 years from the product’s approval date. Only one patent applicable to an approved product and only those claims covering the approved drug, a method for using it, or a method for manufacturing it may be extended. In addition, the application for the extension must be submitted prior to the expiration of the patent in question. A patent that covers multiple products for which approval is sought can only be extended in connection with one of the approvals. The USPTO reviews and approves the application for any patent term extension or restoration in consultation with the FDA.

Other U.S. Healthcare Laws and Compliance Requirements

In the United States, our activities are potentially subject to regulation by various federal, state and local authorities in addition to the FDA, including but not limited to, the Centers for Medicare and Medicaid Services, or CMS, other divisions of the U.S. Department of Health and Human Services (e.g., the Office of Inspector General), the U.S. Department of Justice, or DOJ, and individual U.S. Attorney offices within the DOJ, and state and local governments. For example, sales, marketing and scientific/educational grant programs are subject to anti-fraud and abuse provisions of the Social Security Act, the false claims laws, the privacy provisions of HIPAA (defined below), transparency reporting laws, and similar state laws, each as amended. Healthcare providers and third-party payors play a primary role in the recommendation and prescription of drug products that are granted marketing approval. Arrangements with providers, consultants, third-party payors and customers are subject to these broadly applicable healthcare laws and regulations that may constrain our business and/or financial arrangements.

The applicable federal and state healthcare laws and regulations, include, without limitation, the following:

| • |  | The Federal Anti-Kickback Statute – An intent-based federal criminal statute that prohibits, among other things, any person or entity, from knowingly and willfully offering, paying, soliciting or receiving any remuneration, directly or indirectly, overtly or covertly, in cash or in kind, to induce or reward, or in return for, either the referral of an individual for, or the purchase, lease, order, recommendation, or arranging of, any item or service for which payment may be made, in whole or in part, by a federal health care program such as Medicare or Medicaid. The term “remuneration” has been interpreted broadly to include anything of value. The Patient Protection and Affordable Care Act, as amended by the Health Care and Education Reconciliation Act (collectively, “PPACA”), among other things, amended the intent requirement of the federal Anti-Kickback Statute to clarify that a person or entity need not have actual knowledge of this statute or specific intent to violate it. The Anti-Kickback Statute applies to arrangements between pharmaceutical manufacturers on the one hand and individuals, such as prescribers, patients, purchasers, and formulary managers on the other hand, including, for example, consulting/speaking arrangements, discount and rebate offers, grants, charitable contributions, and patient support offerings, among others. A conviction for violation of the Anti-Kickback Statute can result in criminal fines and/or imprisonment and requires mandatory exclusion from participation in federal health care programs. Exclusion may also be imposed if the government determines that an entity has committed acts that are prohibited by the Anti-Kickback Statute. Although there are a number of statutory exceptions and regulatory safe harbors to the federal Anti-Kickback Statute that protect certain common industry activities from prosecution, the exceptions and safe harbors are drawn narrowly and arrangements may be subject to scrutiny or penalty if they do not fully satisfy all elements of an available exception of safe harbor. The Anti-Kickback Statute safe harbors are the subject of possible regulatory reforms. Any changes to the safe harbors may impact our future contractual and other arrangements with pharmacy benefit managers, group purchasing organizations, third-party payors, wholesalers and distributors, healthcare providers and prescribers, and other entities, as well as our future pricing strategies.

| • |  | The Federal Civil False Claims Act—Imposes civil penalties, including through civil whistleblower or qui tam actions, against individuals or entities for, among other things, knowingly presenting, or

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| causing to be presented, false or fraudulent claims for payment to a federal health care program or knowingly making using or causing to be made or used a false statement or record material to payment of a false claim or avoiding, decreasing or concealing an obligation to pay money to the federal government, with potential liability including mandatory treble damages and significant per-claim penalties, currently set at $11,665 to $22,331 per false claim or statement for penalties assessed after June 19, 2020, with respect to violations occurring after November 2, 2015. Pharmaceutical companies have been investigated and/or subject to government enforcement actions asserting liability under the federal civil False Claims Act in connection with their alleged off-label promotion of drugs, purportedly concealing price concessions in the pricing information submitted to the government for government price reporting purposes (e.g., under the Medicaid Drug Rebate Program), and allegedly providing free product to customers with the expectation that the customers would bill federal health care programs for the product. In addition, the government may assert that a claim including items or services resulting from a violation of the federal Anti-Kickback Statute constitutes a false or fraudulent claim for purposes of the federal False Claims Act. As a result of a modification made by the Fraud Enforcement and Recovery Act of 2009, a claim includes “any request or demand” for money or property presented to the U.S. government. In addition, manufacturers can be held liable under the federal False Claims Act even when they do not submit claims directly to government payors if they are deemed to “cause” the submission of false or fraudulent claims. There is also the Federal Criminal False Claims Act, which is similar to the Federal Civil False Claims Act and imposes criminal liability on those that make or present a false, fictitious or fraudulent claim to the federal government.

| • |  | The Federal Criminal Statute on False Statements Relating to Health Care Matters—Makes it a crime to knowingly and willfully falsify, conceal, or cover up a material fact, make any materially false, fictitious, or fraudulent statements or representations, or make or use any materially false writing or document knowing the same to contain any materially false, fictitious, or fraudulent statement or entry in connection with the delivery of or payment for healthcare benefits, items, or services.

| • |  | Criminal Health Care Fraud Statute—Enacted as part of the Health Insurance Portability and Accountability Act of 1996 (“HIPAA”), makes it a crime to knowingly and willfully execute, or attempt to execute, a scheme or artifice to defraud any health care benefit program or to obtain, by means of false or fraudulent pretenses, representations or promises, any money or property owned by, or under the control or custody of, any healthcare benefit program in connection with the delivery of or payment for healthcare benefits, items or services.

| • |  | The Federal Civil Monetary Penalties Law—Authorizes the imposition of substantial civil monetary penalties against an entity, such as a pharmaceutical manufacturer, that engages in activities including, among others (1) knowingly presenting, or causing to be presented, a claim for services not provided as claimed or that is otherwise false or fraudulent in any way; (2) arranging for or contracting with an individual or entity that is excluded from participation in federal health care programs to provide items or services reimbursable by a federal health care program; (3) violations of the federal Anti-Kickback Statute; or (4) failing to report and return a known overpayment.

| • |  | HIPAA Health Information Privacy and Security—HIPAA, as amended by the Health Information Technology for Economic and Clinical Health Act of 2009 (“HITECH”), imposes privacy, security, and breach reporting obligations on certain covered entity healthcare providers, health plans, and healthcare clearinghouse as well as their business associates that perform certain services involving the use or disclosure of individually identifiable health information, including, among other requirements, mandatory contractual terms and technical safeguards to protect the privacy, security and transmission of individually identifiable health information, and require notification to affected individuals and regulatory authorities of certain breaches of security of individually identifiable health information. HITECH also created new tiers of civil monetary penalties, amended HIPAA to make civil and criminal penalties directly applicable to business associates, and gave state attorneys general new authority to file civil actions for damages or injunctions in U.S. federal courts to enforce the federal HIPAA laws and seek attorneys’ fees and costs associated with pursuing federal civil actions. In

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| addition, state laws govern the privacy and security of health information in specified circumstances, many of which differ from each other in significant ways and may not have the same effect, thus complicating compliance efforts.

| • |  | The Federal Physician Payments Sunshine Act—Requires “applicable manufacturers” of drugs, devices, biologics, and medical supplies for which payment is available under Medicare, Medicaid or the State Children’s Health Insurance Program, among others, to track and report annually to the federal government (for disclosure to the public) certain payments and other transfers of value they make to “covered recipients.” The term covered recipients includes U.S.-licensed physicians, teaching hospitals, and, for reports submitted on or after January 1, 2022, physician assistants, nurse practitioners, clinical nurse specialists, certified nurse anesthetists, and certified nurse midwives. Failure to submit required information may result in civil monetary penalties.

| • |  | Analogous State Laws—There are state law equivalents of the above federal laws, such as the Anti-Kickback Statute and the False Claims Act, which may apply to items and services reimbursed by any third-party payor, including commercial insurers (i.e., so-called “all-payor anti-kickback laws”).

| • |  | State Laws Regulating Pharmaceutical Manufacturer Compliance Programs, Drug Price Transparency, and Other Practices—Some state laws require pharmaceutical companies to implement compliance programs, comply with the pharmaceutical industry’s voluntary compliance guidelines and the relevant compliance guidance promulgated by the federal government, or to track and report gifts, compensation, or other remuneration to physicians and other healthcare providers. Several U.S. states and localities have enacted legislation requiring pharmaceutical companies to establish marketing compliance programs, file periodic reports, and/or make periodic public disclosures on sales, marketing, pricing, clinical trials, and other activities. Other state laws prohibit certain marketing-related activities including the provision of gifts, meals or other items to certain healthcare providers, and restrict the ability of manufacturers to offer co-pay support to patients for certain prescription drugs. In addition, several recently passed state laws require disclosures related to state agencies and/or commercial purchasers with respect to certain price increases that exceed a certain level as identified in the relevant statutes. Some of these laws and regulations contain ambiguous requirements that government officials have not yet clarified. Given the lack of clarity in the laws and their implementation, our reporting actions could be subject to the penalty provisions of the pertinent federal and state laws and regulations.

| • |  | We are also required to satisfy the product tracing, verification and reporting requirements set out in the Drug Quality and Security Act.

We expect that one or more of our products, if approved, may be eligible for coverage under Medicare, the federal health care program that provides health care benefits to the aged and disabled, including coverage for outpatient services and supplies, such as certain drug products, that are medically necessary to treat a beneficiary’s health condition. In addition, one or more of our products, if approved, may be covered and reimbursed under other federal health care programs, such as Medicaid and the 340B Drug Pricing Program. The Medicaid Drug Rebate Program requires pharmaceutical manufacturers to enter into and have in effect a national rebate agreement with the Secretary of the Department of Health and Human Services and pay quarterly rebates based on utilization of the manufacturer’s drugs under the program as a condition for states to receive federal matching funds for the manufacturer’s outpatient drugs furnished to Medicaid patients. Under the 340B Drug Pricing Program, the manufacturer must extend discounts to entities that participate in the program. As part of the requirements to participate in these government programs, many pharmaceutical manufacturers must calculate and report certain price reporting metrics to the government, such as average manufacturer price and best price.

Efforts to ensure that our business arrangements with third parties will comply with applicable healthcare laws and regulations will involve substantial costs. It is possible that governmental authorities will conclude that our business practices may not comply with current or future statutes, regulations, guidance, case law or other

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applicable law. If our operations are found to be in violation of any of these laws or any other governmental regulations that may apply to us, we may be subject to significant civil, criminal and administrative penalties, damages, fines, individual imprisonment, exclusion from participation in federal health care programs, such as Medicare and Medicaid, disgorgement, reputational harm, additional oversight and reporting obligations pursuant to a corporate integrity agreement or similar agreement to resolve allegations of non-compliance with applicable laws and regulations, and the curtailment or restructuring of our operations, any of which could adversely affect our ability to market our products, if approved, and adversely impact our financial results. Although effective compliance programs can mitigate the risk of investigation and prosecution for violations of these laws and regulations, these risks cannot be entirely eliminated. Any action against us for an alleged or suspected violation could cause us to incur significant legal expenses and could divert our management’s attention from the operation of our business, even if our defense is successful. If any of the physicians or other healthcare providers or entities with whom we expect to do business is found not to be in compliance with applicable laws, it may be costly to us in terms of money, time and resources, and they may be subject to criminal, civil or administrative sanctions, including exclusions from government-funded healthcare programs.

U.S. Healthcare Reform

In the United States, there have been and continue to be a number of legislative and regulatory changes and proposed changes regarding the healthcare system that could prevent or delay marketing approval of our product candidates, restrict or regulate post-approval activities and affect our ability, or the ability of our future collaborators, to effectively sell any drugs for which we, or they, obtain marketing approval. We expect that current laws, as well as other healthcare reform measures that may be adopted in the future, may result in more rigorous coverage criteria and additional downward pressure on the price that we, or our future collaborators, may receive for any approved drugs. For example, the PPACA substantially changed and continues to impact healthcare financing and delivery by both government payors and private insurers. Among the PPACA provisions of importance to the pharmaceutical industry, in addition to those otherwise described above, are the following:

| • |  | an annual, nondeductible fee on any entity that manufactures or imports certain branded prescription drugs and biologic agents, apportioned among these entities according to their market share in certain government healthcare programs;

| • |  | an increase in the statutory minimum rebates a manufacturer must pay under the Medicaid Drug Rebate Program to 23.1% and 13.0% of the average manufacturer price for branded and generic drugs, respectively;

| • |  | expansion of healthcare fraud and abuse laws, including the False Claims Act and the Anti-Kickback Statute, which include, among other things, new government investigative powers and enhanced penalties for non-compliance;

| • |  | establishment of the Medicare Part D coverage gap discount program that, as a condition for the manufacturers’ outpatient drugs to be covered under Medicare Part D, requires manufacturers to provide a now 70% point-of-sale discount off the negotiated price of applicable brand drugs to eligible beneficiaries during their coverage gap period;

| • |  | expansion of eligibility criteria for Medicaid programs by, among other things, allowing states to offer Medicaid coverage to additional individuals, thereby potentially increasing manufacturers’ Medicaid rebate liability;

| • |  | expansion of the types of entities eligible for discounts under the Public Health Service pharmaceutical pricing program (i.e., the 340B program);

| • |  | reporting of certain financial arrangements between manufacturers of drugs, biologics, devices, and medical supplies and physicians and teaching hospitals under the Physician Payments Sunshine Act;

| • |  | a requirement to annually report certain information regarding drug samples that manufacturers and distributors provide to licensed practitioners; and

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| • |  | creation of the Patient-Centered Outcomes Research Institute to oversee, identify priorities in, and conduct comparative clinical effectiveness research, along with funding for such research.

Since its enactment there have been judicial and Congressional challenges to certain aspects of the PPACA, as well as efforts by the Trump Administration to repeal or replace certain aspects of the PPACA.

While Congress has not enacted legislation to comprehensively repeal the PPACA, at least two bills affecting the implementation of the PPACA have been signed into law, including the repeal, effective January 1, 2019, of the tax-based shared responsibility payment imposed by the PPACA on certain individuals who fail to maintain qualifying health coverage for all or part of a year, which is commonly referred to as the “individual mandate.” In December 2018, a federal district court in Texas ruled that the PPACA’s individual mandate, without the penalty that was repealed effective January 1, 2019, was unconstitutional and could not be severed from the PPACA. As a result, the court ruled the remaining provisions of the PPACA were also invalid. The Fifth Circuit Court of Appeals affirmed the district court’s ruling that the individual mandate was unconstitutional, but it remanded the case back to the district court for further analysis of whether the mandate could be severed from the PPACA (i.e., whether the entire PPACA was therefore also unconstitutional). The Supreme Court of the United States granted certiorari on March 2, 2020, is scheduled to hear oral arguments on November 10, 2020 and the case is expected to be decided in 2021.

Since January 2017, President Trump has also signed several Executive Orders, directives, and legislation affecting certain provisions of the PPACA. For example, effective January 1, 2019, the Bipartisan Budget Act of 2018, or the BBA, among other things, further amended portions of the Social Security Act implemented as part of the PPACA to increase from 50% to 70% the point-of-sale discount that pharmaceutical manufacturers who participate in the Medicare Part D Coverage Gap Discount Program must provide to eligible Medicare Part D beneficiaries during the coverage gap phase of the Part D benefit, commonly referred to as the “donut hole,” and to reduce standard beneficiary cost sharing in the coverage gap from 30% to 25% in most Medicare Part D plans. In the future, there may be additional challenges and/or amendments to the PPACA. Additionally, on December 20, 2019, President Trump signed appropriations legislation for fiscal year 2020 that repealed the PPACA’s so-called “Cadillac” tax on certain high-cost employer-sponsored health insurance plans, for tax years beginning after December 31, 2019; the annual fee imposed on certain health insurance providers, for calendar years beginning after December 31, 2020; and the medical device excise tax on non-exempt medical devices, for sales after December 31, 2019. In the future, there may be additional challenges and/or amendments to the PPACA. It remains to be seen precisely what any new legislation will provide, when or if it will be enacted, and what impact it will have on the availability and cost of healthcare items and services, including drug products.

In addition, other legislative changes have been proposed and adopted since the PPACA was enacted. These changes include the Budget Control Act of 2011, which, among other things, led to aggregate reductions to Medicare payments to providers of up to 2% per fiscal year effective April 1, 2013 and, due to subsequent legislation, will stay in effect through 2030 unless additional Congressional action is taken, with the exception of a temporary suspension of the payment reduction from May 1, 2020 through December 31, 2020 enacted as part of the CARES Act. Further, the American Taxpayer Relief Act of 2012, among other things, reduced Medicare payments to several types of providers and increased the statute of limitations period for the government to recover overpayments from providers from three to five years. These legislative changes may result in additional reductions in Medicare and other healthcare funding and otherwise affect the prices we may obtain for any of our product candidates for which we may obtain regulatory approval or the frequency with which any such product candidate is prescribed or used.

Further, there has been heightened governmental scrutiny recently over the manner in which drug manufacturers set prices for their marketed products in the United States. Congress is considering various legislative proposals, and the Trump Administration has proposed and begun implementing regulatory reforms to further increase transparency around prices and price increases, lower out-of-pocket costs for consumers, and decrease spending on prescription drugs by government programs. On September 13, 2020, President Trump

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issued an executive order directing the Secretary of Health and Human Services to pursue implementation of two new payment models under which Medicare would test whether paying no more than the “most-favored-nation” price for certain included drugs and biological products covered under Part B and Part D, respectively, would mitigate poor clinical outcomes and increased Medicare expenditures associated with high drug costs. If implemented, the “most-favored-nation” price would generally reflect the lowest price, after certain adjustments, for a pharmaceutical product sold in an economically-comparable member country of the Organisation for Economic Co-operation and Development. Congress has also continued to conduct inquiries into the prescription drug industry’s pricing practices. While several proposed reform measures will require Congress to pass legislation to become effective, Congress and the Trump Administration have each indicated that it will continue to seek new legislative and/or regulatory measures to address prescription drug costs. At the state level, legislatures are increasingly passing legislation and states are implementing regulations designed to control spending on, and patient out-of-pocket costs for, drug products. Implementation of cost containment measures or other healthcare reforms that affect the pricing and/or availability of drug products may impact our ability to generate revenue, attain or maintain profitability, or commercialize products for which we may receive regulatory approval in the future.

We expect that these, as well as other healthcare reform measures that may be adopted in the future, may result in more rigorous coverage criteria and in additional downward pressure on the price that we receive for any approved drug. Any reduction in reimbursement from Medicare or other government programs may result in a similar reduction in payments from private payors. The implementation of cost containment measures or other healthcare reforms may prevent us from being able to generate revenue, attain profitability, or commercialize our drugs.

Privacy and Information Security

We may be subject to privacy and data security regulations and legal requirements in the United States and Europe. As we become more dependent on information technologies to conduct our operations, cyber incidents, including deliberate attacks and attempts to gain unauthorized access to computer systems and networks, may increase in frequency and sophistication. Our systems, servers and platforms and those of our service providers may be vulnerable to privacy and information security incidents such as data breaches, viruses or other malicious code, coordinated attacks, data loss, phishing attacks, ransomware, denial of service attacks, or other security or IT incidents caused by threat actors, technological vulnerabilities or human error. If we, or any of our vendors that support our IT or have access to our data, including any third party vendors that collect, process and store personal data on our behalf, fail to comply with laws requiring the protection of personal information, or fail to safeguard and defend personal information or other critical data assets or IT systems, we may be subject to regulatory enforcement and fines as well as private civil actions. We may be required to expend significant resources in the response, containment, mitigation of cybersecurity incidents as well as in defense against claims that our information security was unreasonable or otherwise violated applicable laws or contractual obligations.

In the United States, numerous federal and state laws and regulations, including federal health information privacy laws, state data breach notification laws, state health information privacy laws and federal and state consumer protection laws (e.g., Section 5 of the Federal Trade Commission Act), that govern the collection, use, disclosure and protection of health-related and other personal information could apply to our operations or the operations of our collaborators.

Domestic laws in this area are complex and developing rapidly. Many state legislatures have adopted legislation relating to privacy, data security and data breaches. Laws in all 50 states require businesses to provide notice to customers whose personally identifiable information has been disclosed as a result of a data breach. The laws are not consistent, and compliance in the event of a widespread data breach is costly. States are also frequently amending existing laws, requiring attention to frequently changing regulatory requirements.

Additionally, the Federal Trade Commission, or FTC, and state attorneys general enforce consumer protection laws that prohibit unfair and deceptive acts and practices, including Section 5 of the FTC Act, which

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creates standards for the collection, use, dissemination and security of health-related and other personal information. Claims of unfair or deceptive trade practices regarding privacy and security can lead to significant liabilities and consequences, including regulatory investigations, penalties, fines and orders as well as civil claims, which could impact our data practices and operations or cause reputational damage.

Further, HIPAA, as amended by the Health Information Technology for Economic and Clinical Health Act, or HITECH, and its implementing regulations, imposes requirements relating to the privacy, security and transmission of individually identifiable health information. Among other things, HITECH makes HIPAA’s security standards directly applicable to business associates, independent contractors or agents of covered entities that receive or obtain protected health information in connection with providing a service on behalf of a covered entity. HITECH also created four new tiers of civil monetary penalties, amended HIPAA to make civil and criminal penalties directly applicable to business associates, and gave state attorneys general new authority to file civil actions for damages or injunctions in federal courts to enforce the federal HIPAA laws and seek attorneys’ fees and costs associated with pursuing federal civil actions. In addition, state laws govern the privacy and security of health information in specified circumstances, many of which differ from each other in significant ways and may not have the same effect, thus complicating compliance efforts.

We also may be subject to privacy and data security requirements in Europe. Any clinical trial programs we conduct or research collaborations we enter into in the European Economic Area, or EEA, may subject us to European data protection laws, including the EU General Data Protection Regulation 2016/679, or GDPR. We are subject to the GDPR (as implemented by countries in the EEA), which applies extra-territorially and imposes onerous requirements on controllers (e.g., sponsors) and processors (e.g., CROs, laboratories) of personal data, including, for example: (i) accountability and transparency requirements, and enhanced requirements for obtaining valid consent; (ii) obligations to consider data protection as any new products or services are developed and to limit the amount of personal data processed; (iii) obligations to comply with data protection rights of data subjects; and (iv) reporting of personal data breaches to the supervisory authority without undue delay (and no later than 72 hours). The GDPR also prohibits the international transfer of personal data from the EEA to countries outside of the EEA unless made to a country deemed to have adequate data privacy laws by the European Commission or where a data transfer mechanism has been put in place. Until recently, one such data transfer mechanism was the EU-US Privacy Shield. However, in July 2020 the Court of Justice of the European Union, or CJEU declared the Privacy Shield to be invalid. The CJEU upheld the validity of the standard contractual clauses, or SCCs, as a legal mechanism to transfer personal data but companies relying on SCCs will—subject to additional guidance from regulators in the EEA—need to evaluate and implement supplementary measures that provide privacy protections additional to those provided under SCCs. Further, the GDPR provides that countries in the EEA may establish their own laws and regulations further restricting the processing of certain personal data, including genetic data, biometric data, and health data.

Failure to comply with the GDPR requirements could result in regulatory investigations, enforcement notices requiring us to stop or change the way we use personal data and/or fines of up to 20 million Euros or up to 4% of the total worldwide annual turnover of the preceding financial year, whichever is higher, as well as compensation claims for financial or non-financial loss by affected individuals, negative publicity, reputational harm and a potential loss of business and goodwill.

If our operations are found to be in violation of any of the data protection laws described above or any other laws that apply to us, we may be subject to penalties, including, but not limited to, criminal, civil and administrative penalties, damages, fines, disgorgement, individual imprisonment, possible exclusion from participation in government healthcare programs, injunctions, private qui tam actions brought by individual whistleblowers in the name of the government, class action litigation and the curtailment or restructuring of our operations, as well as additional reporting obligations and oversight if we become subject to a corrective action plan or other agreement to resolve allegations of non-compliance with these laws, any of which could adversely affect our ability to operate our business and our results of operations.

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The Foreign Corrupt Practices Act

The Foreign Corrupt Practices Act, or FCPA, prohibits any U.S. individual or business from paying, offering, or authorizing payment or offering of anything of value, directly or indirectly, to any foreign official, political party or candidate for the purpose of influencing any act or decision of the foreign entity in order to assist the individual or business in obtaining or retaining business. The FCPA also obligates companies whose securities are listed in the United States to comply with accounting provisions requiring the company to maintain books and records that accurately and fairly reflect all transactions of the corporation, including international subsidiaries, and to devise and maintain an adequate system of internal accounting controls for international operations.

Additional Regulation

In addition to the foregoing, state and federal laws regarding environmental protection and hazardous substances, including the Occupational Safety and Health Act, the Resource Conservancy and Recovery Act and the Toxic Substances Control Act, affect our business. These and other laws govern our use, handling and disposal of various biological, chemical and radioactive substances used in, and wastes generated by, our operations. If our operations result in contamination of the environment or expose individuals to hazardous substances, we could be liable for damages and governmental fines. We believe that we are in material compliance with applicable environmental laws and that continued compliance therewith will not have a material adverse effect on our business. We cannot predict, however, how changes in these laws may affect our future operations.

European Union

European Medicines Agency

Marketing approvals under the European Union regulatory system may be obtained through a centralized or the national marketing authorization procedures. The EMA and the European Commission administer the centralized authorization procedure. Pursuant to Regulation (EC) No. 726/2004 and Regulation (EC) 1394/2007, as amended, this procedure is compulsory for human medicines containing a new active substance to treat for which the therapeutic indication is the treatment of any of the following diseases: acquired immune deficiency syndrome, cancer, neurodegenerative disorders, diabetes, auto-immune diseases and other immune dysfunctions, viral diseases and all drugs that are designated as orphan drugs pursuant to Regulation (EC) No. 141/2000, as amended. Drugs for other indications may be granted a centralized authorization in accordance with Regulation (EC) No. 726/2004 if the drug contains a new active substance and is of a significant therapeutic, scientific or technical innovation or where the granting of authorization in accordance with Regulation (EC) No. 726/2004 is in the interests of patients or animal health at EU level.

When a centralized authorization is granted, the authorization is automatically valid in all Member States of the European Union and by extension in the European Economic Area, or EEA, Norway, Iceland and Liechtenstein. According to Article 2 of Regulation (EC) No 726/2004, the marketing authorization holder must be established in the EEA. This means for the UK that as of the end of the transition period (end of 2020), a marketing authorization holder currently established in the UK has to have transferred its marketing authorization to a holder established in the EEA. The transfer of the marketing authorization must be fully completed and implemented by the marketing authorization holder before the end of the transition period. Also, any application for marketing authorizations must be made by applicants established in the EEA. Therefore, applications made by applicants established in the UK will need to change to an applicant established in the EEA.

Under the centralized authorization procedure, the EMA’s Committee for Medicinal Products for Human Use, or CHMP, serves as the scientific committee that evaluates applications and renders opinions about the safety, efficacy and quality of human products on behalf of the EMA. The CHMP is composed of experts nominated by the Competent Authority of each European Union Member State, one of which is appointed to act

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as rapporteur for the coordination of the evaluation with the possible assistance of a further member acting as a co-rapporteur. The CHMP has 210 days to give its opinion to the EMA as to whether a marketing authorization should be granted. This period will be suspended until such time as the supplementary information requested by the CHMP has been provided by the applicant. Likewise, this time-limit will be suspended for the time allowed for the applicant to prepare oral or written explanations. The evaluation process is complex and involves extensive consultation with the Competent Authorities of the Member States of the European Union and a number of experts. It is possible to appeal the opinion within 15 days of receipt of the notification of the opinion. At the end of the re-examination, which lasts up to 60 active days, the CHMP adopts a final opinion. The European Commission usually takes its decision to grant a legally binding authorization within 67 days after obtaining the CHMP decision.

A marketing authorization that has been granted in the European Union may be suspended or withdrawn if ongoing regulatory requirements are not met or if safety problems are identified. Among other things, marketing authorization holders are required to have risk management plans that use risk minimization strategies beyond product labelling to ensure that the benefits of certain prescription drugs outweigh their risks.

Accelerated Assessment Procedures

When an application is submitted for a marketing authorization in the European Union in respect of drugs for human use which is of major interest from the point of view of public health and in particular from the viewpoint of therapeutic innovation, the applicant may request an accelerated assessment procedure pursuant to Article 14 (9) of Regulation (EC) No. 726/2004, as amended. Based on the request, the justifications presented, and the recommendations of the rapporteurs, the CHMP will formulate a decision. Such a decision will be taken without prejudice to the CHMP opinion (positive or negative) on the granting of a marketing authorization. If the CHMP accepts the request, the timeframe for the evaluation will be reduced from the standard 210 days for the centralized procedure to 150 days, but it is possible that the CHMP can revert to the standard time limit for the centralized procedure if it considers that it is no longer appropriate to conduct an accelerated assessment.

Conditional Marketing Authorization and Authorization under Exceptional Circumstances

A conditional marketing authorization is valid for one year, can be renewed annually and may be requested by an applicant or proposed by the CHMP for medicinal products which aim at:

| • |  | the treatment, prevention or medical diagnosis of seriously debilitating or life-threatening diseases;

| • |  | medicinal products to be used in emergency situations in response to public health threats recognized either by the World Health Organization or by the European Union in the framework of Decision No. 1082/2013/EU (e.g. COVID-19 treatments); or

| • |  | medicinal products designated as orphan medicinal products in accordance with Regulation (EC) No. 141/2000, as amended.

A conditional marketing authorization may be requested by an applicant or proposed by the CHMP for medicinal products if all of the following requirements are met:

| • |  | the risk-benefit balance of the medicinal product, as defined in Article 1(28a) of Directive 2001/83/EC, as amended, is positive;

| • |  | it is likely that the applicant will be in a position to provide comprehensive clinical data;

| • |  | unmet medical needs will be fulfilled (no existing satisfactory methods or the medicinal product provides major therapeutic advantage); and

| • |  | the benefit to public health of the immediate availability on the market of the medicinal product concerned outweighs the risk inherent in the fact that additional data are still required.

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The legal basis for a conditional marketing authorization is Article 14-a of Regulation (EC) No. 726/2004, as amended. The provisions for the granting of such an authorization are further elaborated in Regulation (EC) No. 507/2006. The holder will be required to complete ongoing studies or to conduct new studies within a specified period of time with a view to confirming that the benefit-risk balance is positive. In addition, specific obligations may be imposed in relation to the collection of pharmacovigilance data.

In addition, authorization under exceptional circumstances may be requested when it is not possible to provide comprehensive data on the efficacy and safety under normal conditions of use, because:

| • |  | the indications for which the product in question is intended are encountered so rarely that the applicant cannot reasonably be expected to provide comprehensive evidence;

| • |  | in the present state of scientific knowledge, comprehensive information cannot be provided; or

| • |  | it would be contrary to generally accepted principles of medical ethics to collect such information.

The legal basis for the marketing authorization under exceptional circumstances is Article 14 (8) of Regulation (EC) No. 726/2004, as amended, and the relevant documentation for applications in exceptional circumstances are laid down in Part II of Annex I of Directive 2001/83/EC, as amended. The authorization under exceptional circumstances is granted subject to a requirement for the applicant to meet certain conditions, in particular concerning the safety of the medicinal product, notification to the Competent Authorities of any incident relating to its use, and action to be taken. The renewal of the marketing authorization of a medicinal product under exceptional circumstances follows the same rules as a “normal” marketing authorization. After five years, the marketing authorization will then be renewed under exceptional circumstances for an unlimited period, unless the Competent Authority decides, on justified grounds relating to pharmacovigilance, to proceed with one additional five-year renewal.

Manufacturing and Manufacturers’ Authorization

Directive 2003/94/EC, as amended, requires that the manufacturing of investigational medicinal products and approved drugs in the EEA is subject to a separate manufacturing authorization and must be conducted in strict compliance with GMP requirements, which mandate the methods, facilities, and controls used in manufacturing, processing, and packing of drugs to assure their safety and identity. Manufacturers must have at least one Qualified Person, or QP, permanently and continuously at their disposal. Although the ultimate responsibility for the performance of a medicinal product over its lifetime, its safety, quality and efficacy, lies with the marketing authorization holder, the QP is responsible for ensuring that each batch of finished product released onto the market has been manufactured in accordance with GMP, in compliance with EU laws and the specifications set out in the marketing authorization or investigational medicinal product dossier. Certification can only be performed by a QP of the manufacturer and/or importer, which are described in the marketing authorization. GMP requirements are enforced through mandatory registration of facilities and inspections of those facilities. Failure to comply with these requirements could interrupt supply and result in delays, unanticipated costs and lost revenues, and subject the applicant to potential legal or regulatory action, including but not limited to warning letters, suspension of manufacturing, seizure of product, injunctive action or possible civil and criminal penalties.

Commercialization and Promotion

The commercialization and promotion of authorized medicinal products, including industry-sponsored continuing medical education and advertising directed toward the prescribers of drugs, are strictly regulated in the European Union, notably under, among others, Directive 2001/83/EC, as amended, guidance published by the European Commission and the EMA, laws, regulations and guidance set out by the Member States of the European Union and industry wide codes of conduct. The applicable regulatory framework aims to ensure that information provided by holders of marketing authorizations regarding their products is truthful, balanced and

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accurately reflects the safety and efficacy claims authorized by the EMA or by the Competent Authority of the authorizing Member State. Failure to comply with these requirements can result in adverse publicity, warning letters, corrective advertising and potential civil and criminal penalties. Commercialization and promotion of prescription only medicinal products to consumers or patients (directly or indirectly) is strictly forbidden. Advertising of medicines pre-approval or off-label is also prohibited.

Regulatory Data Protection and Market Exclusivity

In the European Union, all new active substances approved on the basis of a complete independent data package benefit from an 8+2+1 year data/market exclusivity regime. This regime consists of (i) a regulatory data protection period and market exclusivity period of eight years, (ii) a market exclusivity period of an additional two years after the eight-year period and (iii) an extended market exclusivity period of one year after the 10-year period if, during the first eight years of those 10 years, the marketing authorization holder obtains an approval for one or more new therapeutic indications which, during the scientific evaluation prior to their approval, are determined to bring a significant clinical benefit in comparison with existing therapies. Under the current rules, a third party may reference the preclinical and clinical data of the original innovator beginning eight years after notification of the grant of the approval in the European Union, but the third party may market a generic version after only 10 or, where applicable, 11 years have lapsed from the notification of the grant of the approval.

Orphan Designation

Medicines that meet the criteria for orphan designation benefit from the incentive of 10 years of market exclusivity once they are approved for commercialization in the European Union. This protects them from market competition with similar medicines with the same indication once they are approved. Market exclusivity is awarded by the European Commission and is specifically linked to one specific orphan designation for which a marketing authorization has been granted. Each orphan designation carries the potential for one market exclusivity for a particular indication. A medicine that has several separate orphan designations for different indications can have several separate market exclusivities if these refer to separate designated conditions. A designated orphan medicinal product shall be removed from the European Union’s Community register of orphan medicinal products at the end of the period of market exclusivity.

The period of market exclusivity is extended by two years for medicines that also have complied with an agreed pediatric investigational plan, or PIP. This period may, however, be reduced to six years if, at the end of the fifth year, it is established that the product no longer meets the criteria for orphan drug designation, including among other things, if the product is sufficiently profitable so that market exclusivity is no longer justified.

Notwithstanding the foregoing, a marketing authorization may be granted, for the same therapeutic indication, to a similar drug if:

| • |  | the holder of the marketing authorization for the original orphan drug has given its consent to the second applicant;

| • |  | the holder of the marketing authorization for the original orphan drug is unable to supply sufficient quantities of the drug; or

| • |  | the second applicant can establish in the application that the second drug, although similar to the orphan drug already authorized, is safer, more effective or otherwise clinically superior.

Regulation (EC) No 847/2000 lays down definitions of the concepts “similar drug” and “clinical superiority.”

In order to be eligible for incentives made available by the European Union and by the Member States to support research into, and the development and availability of, orphan drugs, the medicinal product needs to be

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designated as an orphan drug pursuant to Regulation (EC) No. 141/2000, as amended. Regulation (EC) No. 141/2000, as amended, states that a medicinal product shall be designated as an orphan medicinal product if its manufacturer can establish:

| • |  | that it is intended for the diagnosis, prevention or treatment of a life-threatening or chronically debilitating condition affecting not more than five in 10,000 persons in the European Union when the application is made or that it is intended for the diagnosis, prevention or treatment of a life-threatening, seriously debilitating or serious and chronic condition in the European Union and that without incentives it is unlikely that the commercialization of the medicinal product in the European Union would generate sufficient return to justify the necessary investment; and

| • |  | that there exists no satisfactory method of diagnosis, prevention or treatment of the condition in question that has been authorized in the community or, if such method exists, the medicinal product will be of significant benefit to those affected by that condition.

Small- or Medium-Sized Enterprise Status

In the European Union, manufacturers may benefit from further incentives, including administrative and procedural assistance and fee reductions when they are classified as a small- or medium-sized enterprises, or SME. Within the SMEs, medium enterprises are defined as those which employ between 50 to 249 persons and which have an annual turnover not exceeding €50 million or an annual balance sheet total not exceeding €43 million; a small enterprise is defined as an enterprise which employs between 10 to 49 persons and whose annual turnover or annual balance sheet total does not exceed €10 million; and a microenterprise is defined as an enterprise which employs fewer than 10 persons and whose annual turnover or annual balance sheet total does not exceed €2 million.

Administrative, regulatory and financial support is available to companies assigned the SME status by the EMA, including:

| • |  | direct assistance by phone, email, teleconference or through briefing meetings on regulatory aspects of the pharmaceutical legislation;

| • |  | fee exemptions and reductions for pre- and post-authorization regulatory procedures, including scientific advice, inspections and pharmaco-vigilance;

| • |  | assistance with translations of product information into all official European Union languages;

| • |  | inclusion in an online SME register, which is an important source of information on the EU-based SMEs involved in the manufacturing, development or marketing of medicines and promotes partnering and networking between the SMEs;

| • |  | guidance on clinical data publication and a free redaction tool license;

| • |  | liaison with academic investigators in pediatric-medicine research through the European Network of Pediatric Research at the EMA; and

| • |  | workshops and training sessions.

Development of Medicines for Children

Several incentives for the development of medicines for children are available in the European Union:

| • |  | medicines that have been authorized across the European Union with the results of PIP studies included in the product information are eligible for an extension of their patent protection by six months even when the studies’ results are negative;

| • |  | for orphan medicines, the incentive is an additional two years of market exclusivity;

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| • |  | scientific advice and protocol assistance at the EMA are free of charge for questions relating to the development of medicines for children; and

| • |  | medicines developed specifically for children that are already authorized but are not protected by a patent or supplementary protection certificate, can apply for a pediatric-use marketing authorization, or PUMA, which provides 10 years of market protection.

Pediatric Regulation

On January 26, 2007, the Pediatric Regulation (Regulation (EC) No. 1901/2006 and Regulation (EC) No. 1902/2006) came into force in the European Union. Its objective is to improve the health of children in the European Union by facilitating the development and availability of medicines for children from birth up to 18 years of age, ensuring that medicines for use in children are of high quality, ethically researched and authorized appropriately and improving the availability of information on the use of medicines for children. The aim is to achieve this without subjecting children to unnecessary trials or delaying the authorization of medicines for use in adults. The Pediatric Regulation established the Pediatric Committee, or PDCO, which is responsible for coordinating the EMA’s work on medicines for children. The Committee’s main role is to determine the studies that companies must carry out on children as part of PIPs. At least an approved PIP needs to be in place before applying for marketing authorization. The PDCO grants deferrals for some medicines, allowing a company to delay development of the medicine in children until there is enough information to demonstrate its effectiveness and safety in adults. The PDCO also grants waivers when development of a medicine in children is not needed or is not appropriate, such as for diseases that only affect the elderly population. When the approved PIP contains studies that need to be performed, the proposed study design and timelines need to be adhered to.

Pharmaceutical Coverage, Pricing and Reimbursement

Significant uncertainty exists as to the coverage and reimbursement status of any product candidates for which we obtain regulatory approval. Countries have different pricing and reimbursement schemes. In the European Union, the United States and markets in other countries, sales of any products for which we receive regulatory approval for commercial sale will depend, in part, on the extent to which third-party payors provide coverage and establish adequate reimbursement levels for such products.

In the European Union, governments influence the price of pharmaceutical products through their pricing and reimbursement rules and control of national health care systems that fund a large part of the cost of those products to consumers. Some jurisdictions operate positive and negative list systems under which products may only be marketed once a reimbursement price has been agreed. To obtain reimbursement or pricing approval, some of these countries may require the completion of clinical trials that compare the cost-effectiveness of a particular product candidate to currently available therapies. Other member states allow companies to fix their own prices for medicines but monitor and control company profits. Special pricing and reimbursement rules may apply to orphan drugs. Inclusion of orphan drugs in reimbursement systems tends to focus on the medical usefulness, need, quality and economic benefits to patients and the healthcare system as for any drug. The downward pressure on health care costs has become very intense. As a result, increasingly high barriers are being erected to the entry of new products. In addition, in some countries, cross-border imports from low-priced markets exert a commercial pressure on pricing within a country.

In the United States, third-party payors include federal and state healthcare programs, private managed care providers, health insurers and other organizations. Even if our product candidates are approved, sales of our products will depend, in part, on the extent to which third-party payors provide coverage and establish adequate reimbursement levels for such products. The process for determining whether a third-party payor will provide coverage for a product may be separate from the process for setting the price of a product or for establishing the reimbursement rate that such a payor will pay for the product. Third-party payors may limit coverage to specific products on an approved list, also known as a formulary, which might not include all of the FDA-approved

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products for a particular indication. Third-party payors are increasingly challenging the price, examining the medical necessity and reviewing the cost-effectiveness of medical products, therapies and services, in addition to questioning their safety and efficacy. We may need to conduct expensive pharmaco-economic studies in order to demonstrate the medical necessity and cost-effectiveness of our product candidates, in addition to the costs required to obtain the FDA approvals. Our product candidates may not be considered medically necessary or cost-effective. A payor’s decision to provide coverage for a product does not imply that an adequate reimbursement rate will be approved. Further, one payor’s determination to provide coverage for a product does not assure that other payors will also provide coverage for the product. Adequate third-party reimbursement may not be available to enable us to maintain price levels sufficient to realize an appropriate return on our investment in product development.

In addition, prices for drugs may be reduced by mandatory discounts or rebates required by federal health care programs (such as the Medicaid Drug Rebate Program and the 340B Drug Pricing Program) or discounts and rebates requested by private payors. In addition, any future relaxation of laws that presently restrict imports of drugs from countries where they may be sold at lower prices than in the United States may also impact the pricing of drugs. It is difficult to predict how Medicare coverage and reimbursement policies will be applied to products for which the company receives marketing approval in the future and coverage and reimbursement under different federal health care programs is not always consistent. Further, private payors often follow the coverage and reimbursement policies established under Medicare. If reimbursement is not available or is available only at limited levels, we may not be able to successfully commercialize our products for which we receive marketing approval.

The containment of healthcare costs also has become a priority of federal, state and foreign governments and the prices of drugs have been a focus in this effort. Governments have shown significant interest in implementing cost-containment programs, including price controls, restrictions on reimbursement and requirements for substitution of generic products. Adoption of price controls and cost-containment measures, and adoption of more restrictive policies in jurisdictions with existing controls and measures, could further limit a company’s revenue generated from the sale of any approved products. Coverage policies and third-party reimbursement rates may change at any time. Even if favorable coverage and reimbursement status is attained for one or more products for which a company or its collaborators receive marketing approval, less favorable coverage policies and reimbursement rates may be implemented in the future.

The marketability of any product candidates for which we receive regulatory approval for commercial sale may suffer if the government and third-party payors fail to provide adequate coverage and reimbursement. In addition, emphasis on managed care in the United States has increased and we expect will continue to increase the pressure on healthcare pricing. Coverage policies and third-party reimbursement rates may change at any time. Even if favorable coverage and reimbursement status is attained for one or more products for which we receive regulatory approval, less favorable coverage policies and reimbursement rates may be implemented in the future.

Facilities

We have offices in Waltham, Massachusetts; Zug, Switzerland; and, Leiden, The Netherlands. Our office in Massachusetts is rented on a monthly basis; our Switzerland office is rented on an annual basis; and our office in the incubator at the Bioscience Park in Leiden is sub-leased on a yearly basis.

Employees

As of February 1, 2021, we had 14 employees. We believe our relations with our employees are good.

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The table below sets out the number of employees by geography as of February 1, 2021:

Geography |  | As of February 1, 2021 |
Switzerland |  |  | 1 |
The Netherlands |  |  | 8 |
United States |  |  | 5 |
Total |  |  | 14 |

Corporate Structure

We are incorporated as a Dutch private company with limited liability (besloten vennootschap) with operating subsidiaries in the Netherlands, Switzerland and the United States. We have raised more than $163 million of invested capital from LSP, Kurma Partners, Idinvest Partners, Foresite Capital, Bain Capital Life Sciences, venBio Partners, VenRock Partners, Viking Global Investors, General Atlantic, and Cormorant Asset Management.

The following diagram illustrates our corporate structure immediately following the consummation of this offering:

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MANAGEMENT

Board and Senior Management

The following table presents information about our Board and Senior Management upon consummation of this offering.

Name |  | Position |  | Age |  |  | Initial year of appointment |  |  | Term |
Board |  |  |  |  |  |  |  |  |  |  |  |  |  |
Berndt Modig |  | Chief Executive Officer and Executive Director |  |  | 62 |  |  |  | 2015 |  |  |  | 2024 |
Rémi Droller |  | Non-Executive Director |  |  | 45 |  |  |  | 2016 |  |  |  | 2023 |
Richard Gaster, M.D., Ph.D. |  | Non-Executive Director |  |  | 36 |  |  |  | 2019 |  |  |  | 2022 |
Hans Schikan, PharmD. |  | Non-Executive Director |  |  | 62 |  |  |  | 2019 |  |  |  | 2024 |
Martijn Kleijwegt |  | Non-Executive Director |  |  | 65 |  |  |  | 2016 |  |  |  | 2023 |
David Meeker, M.D. |  | Non-Executive Director |  |  | 66 |  |  |  | 2021 |  |  |  | 2025 |
Robert Glassman, M.D. |  | Non-Executive Director |  |  | 59 |  |  |  | 2021 |  |  |  | 2025 |
Senior Management |  |  |  |  |  |  |  |  |  |  |  |  |  |
Berndt Modig |  | Chief Executive Officer and Director |  |  | 62 |  |  |  | 2015 |  |  |  | N/A |
Jochen Knolle, Ph.D. |  | Chief Scientific Officer and Chief Operating Officer |  |  | 71 |  |  |  | 2015 |  |  |  | N/A |
Peng Lu, M.D., Ph.D. |  | Chief Medical Officer |  |  | 43 |  |  |  | 2020 |  |  |  | N/A |
Anne Lesage, Ph.D. |  | Chief Early Development Officer |  |  | 59 |  |  |  | 2015 |  |  |  | N/A |
Morgan Conn, Ph.D. |  | Chief Business Officer |  |  | 52 |  |  |  | 2017 |  |  |  | N/A |
Anna Nijdam, MSc RA |  | Finance Director and Principal Accounting Officer |  |  | 39 |  |  |  | 2020 |  |  |  | N/A |

Unless otherwise indicated, the current business address for members of our Board and Senior Management is Pharvaris B.V., J.H. Oortweg 21, 2333 CH Leiden, The Netherlands.

Family Relationships

No family relationships or other arrangements exist among any member of our Board or Senior Management.

Board and Senior Management

Board Structure

The Board as a collective is responsible for our management, strategy, policy and operations. The executive director manages our day-to-day business and operations and implement our strategy. The non-executive directors focus on the supervision of the policy and functioning of the performance of the duties of all directors and our general state of affairs. Each director has a statutory duty to act in the corporate interest of the Company and its business. Under Dutch law, the corporate interest extends to the interests of all corporate stakeholders, such as shareholders, creditors, employees, customers and suppliers. The duty to act in the corporate interest of the Company also applies in the event of a proposed sale or break-up of the Company, provided that the circumstances generally dictate how such duty is to be applied and how the respective interests of various groups of stakeholders should be weighed. Any resolution of the Board regarding a material change in our identity or character, as defined under Dutch law, requires approval of our general meeting.

Upon completion of this offering, the Board may consist of one or more executive directors and one or more non-executive directors. The Board shall be composed of individuals.

Under our Articles of Association that will be effective upon consummation of this offering, the directors are appointed by the general meeting upon binding nomination by our Board based on a recommendation of our

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nomination and corporate governance committee. However, the general meeting may at all times overrule the binding nomination by a resolution adopted by at least a two-thirds majority of the votes cast, provided such majority represents more than half of the issued share capital. If the general meeting overrules the binding nomination, the Board shall make a new nomination.

At a general meeting, a resolution to appoint a director can only be passed in respect of candidates whose names are stated for that purpose in the agenda of that general meeting or in the explanatory notes thereto. Upon the appointment of a person as a director, the general meeting shall determine whether that person is appointed as executive director or as non-executive director.

The general meeting shall at all times be entitled to suspend or remove a director. Under our Articles of Association that will be effective upon the consummation of this offering, the general meeting may only adopt a resolution to suspend or remove a director by at least a two-thirds majority of the votes cast, provided such majority represents more than half of the issued share capital, unless the resolution is passed at the proposal of the Board, in which latter case a simple majority of the votes cast is sufficient. The Board may also suspend, but may not remove, an executive director. The Articles of Association that will be effective upon consummation of this offering will not contain limitations on the period of a term of appointment nor on the number of consecutive terms, but we will be subject to the Dutch Corporate Governance Code, or DCGC, which provides the following best practice recommendations on the terms for directors’ service:

| • |  | executive directors should be appointed for a maximum period of four years, without limiting the number of consecutive terms executive directors may serve; and

| • |  | non-executive directors should be appointed for two consecutive periods of no more than four years, after which non-executive directors may be reappointed for a maximum of two consecutive periods of no more than two years, provided that in the event of reappointment after an eight-year term of office the reasons thereof should be disclosed in the Company’s statutory annual Board report.

Board of Directors

The following is a brief summary of the business experience of our Board.

Berndt Modig

Mr. Modig is a co-founder of the Company and has served as Chief Executive Officer since its inception. Mr. Modig is also a director of the Company. Prior to co-founding the Company, Mr. Modig served as Chief Financial Officer of Prosensa Holding N.V., a biopharmaceutical company focusing on novel RNA modulating treatments for rare diseases like Duchenne muscular dystrophy, from March 2010 through its IPO on the NASDAQ in 2013 until its acquisition by BioMarin Pharmaceutical Inc. in January 2015.

From October 2003 to November 2008, Mr. Modig was Chief Financial Officer at Jerini AG through its IPO on the Frankfurt exchange in 2005 and sale to Shire plc in 2008. Jerini developed and launched icatibant for the treatment of HAE, now currently marketed by Shire plc under the FIRAZYR brand name. Before Jerini AG, Mr. Modig served as Chief Financial Officer at Surplex AG from 2001 to 2003 and as Finance Director Europe of U.S.-based Hayward Industrial Products Inc. from 1999 to 2001. In previous positions, Mr. Modig was a Partner in the Brussels-based private equity firm Agra Industria from 1994 to 1999 and a Senior Manager in the Financial Services Industry Group of Price Waterhouse LLP in New York from 1991 to 1994.

Mr. Modig also serves as a director, chair of the compensation committee and member of the audit committee of Sio Gene Therapies Inc., as vice chairman and chair of the audit committee of Kiadis Pharma N.V., and as a member of the supervisory board and chair of the audit committee of Centogene N.V., all publicly held pharmaceutical companies. Mr. Modig received a bachelor’s degree in business administration, economics and German from the University of Lund, Sweden, and an MBA from INSEAD, Fontainebleau, France. Mr. Modig is

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a certified public accountant (inactive). We believe that Mr. Modig is qualified to serve on our Board because of his extensive international experience in finance and operations, private equity and mergers and acquisitions, and his service on the boards of directors of other biopharmaceutical companies.

Rémi Droller

Mr. Droller has been a director since April 2016. Mr. Droller has been working as Managing Partner with Kurma Partners since 2010 and is in charge of investments in AM Pharma, Orphazyme, Oxthera (Sweden), ImCheck (France), Stat Dx, Zealand Pharma, Vico Therapeutics, Flamingo Therapeutics and Dynacure. Mr. Droller started at CDC Innovation (now bpi France) from 2000 to 2003, later joining AGF Private Equity (now Idinvest Partners) where he developed the investment activity in the life sciences and made investments such as Novagali Pharma, Prosensa Holding N.V., Vivacta, IntegraGen, and Onxeo.

Mr. Droller holds a Master in Molecular Biology (Paris VI) and Master in Finance and Innovation Management (Masternova – AgroPariTech). We believe that Mr. Droller is qualified to serve on our Board because of his extensive experience as a venture capital investor and his service on the boards of directors of other biopharmaceutical companies.

Richard Gaster, M.D., Ph.D.

Dr. Gaster has been a director since in August 2019. Dr. Gaster currently is a partner at venBio and serves on the boards of Arrakis Therapeutics, NorthSea Therapeutics, Attralus, Stargazer Pharmaceuticals and Aeovian Pharmaceuticals, and served as a board observer for Akero Therapeutics and Harmony Biosciences. Dr. Gaster joined venBio in 2017 with experience as a physician, entrepreneur, and life sciences investor. Prior to joining venBio, Dr. Gaster served as the head of translational medicine at Pliant Therapeutics. Dr. Gaster began his career as a resident physician in Harvard’s Plastic and Reconstructive Surgery Program. Dr. Gaster has published numerous articles in top-tier peer-reviewed journals including Nature Medicine and Nature Nanotechnology, holds more than a dozen patents, and in 2014 was named one of Forbes “30 Under 30” in Science and Healthcare.

Dr. Gaster holds a BSE in Bioengineering from the University of Pennsylvania where he graduated summa cum laude. Dr. Gaster received his MD and PhD in Bioengineering from Stanford University in the Medical Scientist Training Program. We believe that Mr. Gaster is qualified to serve on our Board because of his experience in the pharmaceutical industry and his service on the boards of directors of other biopharmaceutical companies.

Hans Schikan

Mr. Schikan is a co-founder of the Company and has been a director since August 28, 2019. Mr. Schikan is the former CEO of Prosensa Holding N.V., a biopharmaceutical company focusing on novel RNA modulating treatments for rare diseases including Duchenne muscular dystrophy.

Mr. Schikan was previously at Genzyme, most recently serving as VP for Global Marketing and Strategic Development of Genzyme’s product portfolio for rare genetic diseases. He is currently Chairman of the Board of Complix and InteRNA, Board Member of Vicore Pharma and VectivBio.

Mr. Schikan is also member of the Top Team of the Dutch Top Sector Life Sciences & Health. Previously, he served on the boards of Sobi, Hansa Biopharma, Asceneuron, Wilson Therapeutics (acquired by Alexion) and Therachon (acquired by Pfizer). Mr. Schikan has a Pharm.D. degree from Utrecht University. We believe that Mr. Schikan is qualified to serve on our Board because of his extensive senior managerial experience in the pharmaceutical and biotechnology industries, his role as CEO of Prosensa Holding N.V. and his service on the boards of directors of other biopharmaceutical companies.

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Martijn Kleijwegt

Mr. Kleijwegt has been a director since April 2016. Mr. Kleijwegt founded LSP in 1998 and is currently a Managing Partner and co-owner of LSP. Mr. Kleijwegt brings over 30 years of hands-on finance and investment experience to the Company. We believe that Mr. Kleijwegt is qualified to serve on our Board because of his experience in the biopharmaceutical industry as a venture capital investor, a founder of Life Sciences Partners and a member of the boards of directors of other biopharmaceutical companies.

David Meeker, M.D.

Dr. Meeker has been a director since January 2021. Dr. Meeker is the Chairman of the Board of Directors, President and Chief Executive Officer of Rhythm Pharmaceuticals, Inc. Prior to joining Rhythm Pharmaceuticals, Dr. Meeker served as President and Chief Executive Officer of KSQ Therapeutics, Inc. from 2017 to 2020. Prior to joining KSQ, Dr. Meeker worked at Sanofi Genzyme from 2011 to 2017, in a variety of roles, including as President and Chief Executive Officer of Genzyme, a Sanofi Company, as a member of Sanofi’s Executive Committee, and as Executive Vice President and Head of Sanofi Genzyme, Sanofi’s specialty care unit with responsibility for rare diseases, multiple sclerosis, oncology and immunology franchises. Prior to joining Genzyme, Dr. Meeker was Director of the Pulmonary Critical Care Fellowship at the Cleveland Clinic. Dr. Meeker has served as Chair of Trevi Therapeutics since 2017. He also served as a Director of MyoKardia, Inc. until its acquisition by Bristol Myers Squibb. Dr. Meeker holds a medical degree from the University of Vermont Medical School and completed the Advanced Management Program at Harvard Business School in 2000. We believe that Dr. Meeker is qualified to serve on our Board because of his extensive experience in the healthcare industry and as a member of the board of directors of other biopharmaceutical companies.

Robert Glassman, M.D.

Dr. Glassman has been a director since January 2021. Dr. Glassman is currently the Public Equity Venture Partner at OrbiMed Advisors. Previously, Dr. Glassman had been working as a senior investment banker for 17 years, most recently serving as Vice Chairman at Credit Suisse Securities since 2015. Prior to joining Credit Suisse Securities, Dr. Glassman served as a Managing Director at Bank of America Merrill Lynch between 2010-2015. From 2009-2010, Dr. Glassman served as a private equity partner at OrbiMed Advisors. Earlier in his career, Dr. Glassman was with Merrill Lynch Global Private Equity where he oversaw a very successful healthcare portfolio and at McKinsey & Co. where he consulted for a wide range of clients within their Pharmaceutical and Medical Products practice.

Dr. Glassman was a board certified hematologist-oncologist who remains on the faculty of Weil Cornell as a Clinical Assistant Professor of Medicine. He has co-authored numerous articles in peer-reviewed journals and spoken widely in industry and academic forums on clinical development, reimbursement, and data interpretation. Dr. Glassman received his AB from Harvard College magna cum laude and an MD from Harvard Medical School. He completed his residency in internal medicine at the Hospital of the University of Pennsylvania, and his fellowship in hematology and oncology at Weill Cornell. He also spent several years as a basic science investigator at Rockefeller University in the laboratory of Hidesaburo Hanafusa, where he received Howard Hughes Medical Institute and American Cancer Society awards. We believe that Dr. Glassman is qualified to serve on our Board because of his extensive experience as an investment banker and in the healthcare industry.

Senior Management

The following is a brief summary of the business experience of members of our Senior Management.

Jochen Knolle, Ph.D.

Dr. Knolle is a co-founder of the Company and has served as Chief Scientific Officer and Chief Operating Officer since our inception. Dr. Knolle’s experience spans 40 years in the pharmaceutical industry. Dr. Knolle is named as an author of many publications and as an inventor for many patents, including the approved therapeutics Quinapril, a marketed ACE inhibitor and icatibant.

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From 1978 to 1998, Dr. Knolle worked in several functions in the central pharmaceutical research unit of Hoechst AG and Hoechst-Marion-Roussel (HMR). In 1998, Dr. Knolle left HMR to join Axys Pharmaceuticals (now Celera) in San Francisco, where he served as VP for Medicinal Chemistry and structural biology. From 2001 to 2008, Dr. Knolle was the Chief Scientific Officer and Head of R&D in the management board of Jerini AG in Berlin, Germany. In 2008, Dr. Knolle left the management of Jerini AG and established JCK Consult.

In addition to his consultancy activities, Dr. Knolle was a co-founder of Kosa Pharma and 3B Pharmaceuticals and acts as a board member for the Charité Research Organisation GmbH, and Thermosome, and as Senior Advisor for Kurma Partners. Dr. Knolle studied chemistry in Göttingen and Münster. After a post-doc in the laboratory of the Nobel Laureate E.J. Corey at Harvard University, he joined the pharmaceutical unit of Hoechst AG in 1978.

Peng Lu, M.D., Ph.D.

Dr. Lu joined the Company in 2020, bringing 15 years of protein therapeutics and small molecule drug development experience including within genetic rare diseases.

Previously, Dr. Lu served as the Vice President, Global Program Lead for rare diseases at Takeda (via acquisition of Shire). During Dr. Lu’s time at Takeda/Shire, she was instrumental in leading project teams that successfully completed two Phase 3 pivotal HAE studies and achieved global approval of TAKHZYRO (lanadelumab-flyo) for the prevention of HAE attacks in the U.S., EU, and the rest of the world. In addition, she has also led the life-cycle management of TAKHZYRO beyond HAE, looking to broaden indications in other plasma-kallikrein-mediated diseases.

Prior to Takeda/Shire, Dr. Lu held roles in clinical development, translational research and clinical pharmacology with increasing levels of responsibility at AbbVie and Roche/Genentech, where she was responsible for the design and implementation of early and late development clinical strategy across a broad range of indications including autoimmune, respiratory, and genetic diseases leading to multiple approvals. Dr. Lu received her medical degree from Beijing Medical University and Ph.D. from The University of Texas, Austin, in systems biology.

Anne Lesage, Ph.D.

Dr. Lesage is a co-founder of Pharvaris and has led the translational science, preclinical and non-clinical development since its inception. Dr. Lesage has over 25 years’ experience in drug discovery, preclinical and early development and scientific and strategic project management.

From 1992 until 2010, Dr. Lesage held different leadership positions with increasing responsibility in the neuroscience drug discovery unit at Johnson & Johnson. Dr. Lesage started as project team lead, and moved to head of exploratory research and biology head of psychiatry. Dr. Lesage is an inventor on 9 patents and an author of 45 publications. Dr. Lesage founded GrayMatters Consulting in 2010, and advised early and late stage biotech companies, venture capital organisations, and government agencies and initiatives. In 2013, Dr. Lesage co-founded Kosa Pharma.

Dr. Lesage is trained as a biochemist and holds a Ph.D. in molecular biology. Dr. Lesage studied biochemistry at the University of Ghent, received her Ph.D. in the group of Professor Walter Fiers, and was a post-doctoral fellow in the Child Psychiatry department of Stanford University Medical School and in the CNRS Laboratory of Viral Oncology of Hospital Paul Brousse in Paris.

Morgan Conn, Ph.D.

Dr. Conn joined the Company in 2017, with over 15 years of experience in the biopharmaceutical industry.

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Previously, Dr. Conn worked at PTC Therapeutics from 2001-2017, initially in Research and subsequently helping to build the Business Development function, holding positions of increasing responsibility including global head and Vice President, Business Development. During this time, Dr. Conn was instrumental to all corporate transactions, including collaborations, licenses, and acquisitions with leading pharma, biotech, and academic organizations, and supported private and public financing events behind the company’s growth from a discovery organization to a global commercial entity. Dr. Conn’s portfolio includes transactions and financings supporting three rare pediatric neuromuscular medicines now commercialized: TRANSLARNA (ataluren), EMFLAZA (deflazacort), and EVRYSDI (risdiplam). In 2017, Dr. Conn founded CallisBio, a consulting firm offering strategic and implementation services in biopharma business and corporate development including transactions and financing.

Early in his career, Dr. Conn served as an Assistant Professor in Chemistry at Amherst College, with a cross appointment in the Graduate Molecular and Cellular Biology program at the University of Massachusetts (Amherst). Dr. Conn holds a B.Sc. (Hons) in Chemistry and Biochemistry from the University of Toronto, a Ph.D. in Organic Chemistry from the Massachusetts Institute of Technology as both an NSF and NSERC pre-doctoral fellow, and studied as a post-doctoral Research Fellow of the Miller Institute for Basic Research in Science at the University of California, Berkeley.

Anna Nijdam, MSc RA

Ms. Nijdam joined the Company in 2020, with over 12 years’ experience in the financial industry as a chartered accountant. From 2008 until 2020, Ms. Nijdam worked in the Assurance Services group at Ernst & Young Accountants LLP in Rotterdam, the Netherlands, where she held various leadership positions, including most recently serving as a Senior Manager. Ms. Nijdam is a member of the Associations Audit Committee of Hockey Club Rotterdam and previously served as a member of the supervisory board of Access to Seeds Foundation. Ms. Nijdam holds a masters in economics from the Erasmus University of Rotterdam and a Register Accountant title (Dutch Certified Public Accountant) from Nivra Nyenrode in the Netherlands.

Board Composition and Election of Directors after this Offering

Our Board is comprised of six members. The members of our Board do not have a retirement age requirement under our Articles of Association that will be effective upon consummation of this offering.

Corporate Governance Practices

As a “foreign private issuer,” as defined by the SEC, we are permitted to follow certain governance practices of the Netherlands instead of those otherwise required under the Nasdaq Stock Market, or Nasdaq, rules for domestic issuers. We intend to take advantage of the following limited exemptions:

| • |  | Exemption from filing quarterly reports on Form 10-Q and current reports on Form 8-K disclosing significant events within four days of their occurrence.

| • |  | Exemption from Section 16 rules regarding sales of ordinary shares by insiders, which will provide less data in this regard than to shareholders of U.S. companies that are subject to the Exchange Act.

| • |  | Exemption from the Nasdaq rules applicable to domestic issuers requiring disclosure within four business days of any determination to grant a waiver of the code of business conduct and ethics to directors and officers.

| • |  | Exemption from the requirement that we provide in our bylaws for a generally applicable quorum and that such quorum not be less than one-third of the outstanding voting stock.

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| • |  | Exemption from the requirement that we solicit proxies and provide proxy statements for all meetings of Shareholders and shall provide copies of such proxy solicitation to Nasdaq.

| • |  | Exemption from the requirement for shareholder approval for the issuance of securities in connection with certain events such as the acquisition of shares or assets of another company, the establishment of or amendments to equity-based compensation plans for employees, a change of control of us and certain private placements.

Nasdaq Rule 5615(a)(3) provides that a foreign private issuer may rely on home country corporate governance practices in lieu of certain of the rules in the Nasdaq Rule 5600 Series, Rule 5250(b)(3) and Rule 5250(d).

We intend to take all actions necessary to maintain compliance as a foreign private issuer under the applicable corporate governance requirements of the Sarbanes-Oxley Act, the rules adopted by the SEC and the Nasdaq corporate governance rules and listing standards.

Because we are a foreign private issuer, our directors and senior management are not subject to short-swing profit and insider trading reporting obligations under Section 16 of the Exchange Act. They will, however, be subject to the obligations to report changes in share ownership under Section 13 of the Exchange Act and related SEC rules.

Board Committees

Our Board established an audit committee, a compensation committee and a nomination and corporate governance committee prior to the consummation of this offering.

Audit Committee

The audit committee, which consists of Mr. Droller, Mr. Kleijwegt and Mr. Schikan, assists the Board in overseeing our accounting and financial reporting processes and the audits of our financial statements. Mr. Schikan serves as Chairman of the committee. In addition, the audit committee is responsible for the appointment, compensation, retention and oversight of the work of our independent registered public accounting firm. Our Board has determined that Mr. Droller and Mr. Schikan satisfy the “independence” requirements set forth in the Nasdaq listing standards and Rule 10A-3 under the Exchange Act and expects that upon the consummation of this offering Mr. Droller and Mr. Schikan will continue to satisfy such “independence” requirements. Our Board has determined that Mr. Schikan and Mr. Kleijwegt qualify as “audit committee financial experts,” as such term is defined in the rules of the SEC.

We will rely on the phase-in rules of the SEC and Nasdaq with respect to the independence of our audit committee. These rules require that all members of our audit committee must meet the independence standard for audit committee membership within one year of the effectiveness of the registration statement of which this prospectus forms a part.

Compensation Committee

The compensation committee, which consists of Dr. Glassman, Dr. Meeker and Mr. Schikan, assists our Board in overseeing compensation for our executive officers and our directors. Mr. Schikan serves as Chairman of the committee. Our Board has determined that Dr. Glassman, Dr. Meeker and Mr. Schikan satisfy, and upon the consummation of this offering are expected to satisfy, the “independence” requirements under the Exchange Act and the Nasdaq listing standards.

Nomination and Corporate Governance Committee

The nomination and corporate governance committee, which consists of Mr. Droller, Dr. Gaster and Dr. Meeker, assists our Board in identifying individuals qualified to become members of our Board consistent

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with criteria established by our Board and in developing our code of conduct. Dr. Meeker serves as Chairman of the committee. Our Board has determined that Mr. Droller, Dr. Gaster and Dr. Meeker satisfy, and upon the consummation of this offering are expected to satisfy, the “independence” requirements under the Exchange Act and the Nasdaq listing standards.

Code of Business Conduct and Ethics

We intend to adopt a Code of Business Conduct and Ethics which covers a broad range of matters including the handling of conflicts of interest, compliance issues and other corporate policies such as insider trading and equal opportunity and non-discrimination standards.

Compensation and Other Benefits of Members of Our Board

As a foreign private issuer, in accordance with Nasdaq listing requirements, we will comply with home country compensation requirements and certain exemptions thereunder rather than complying with Nasdaq compensation requirements. Dutch law does not provide for limitations with respect to the aggregate annual compensation paid to our directors, provided that such compensation is consistent with our compensation policy. Such compensation policy requires approval by our general meeting by a simple majority of votes cast. The Board determines the compensation of individual directors with due observance of the compensation policy. A proposal with respect to compensation schemes in the form of shares or rights to shares in which directors may participate is subject to approval by our general meeting by a simple majority of votes cast. Such a proposal must set out at least the maximum number of shares or rights to subscribe for shares to be granted to the directors and the criteria for granting or amendment.

Our compensation policy will authorize our Board to determine the amount, level and structure of the compensation packages of our directors at the recommendation of our compensation committee. These compensation packages may consist of a mix of fixed and variable compensation components, including base salary, short-term incentives, long-term incentives, fringe benefits, severance pay and pension arrangements, as determined by our Board.

Disclosure of Compensation of our Board and Senior Management

For so long as we qualify as a foreign private issuer, we are not required to comply with the proxy rules applicable to U.S. domestic companies, including the requirement applicable to emerging growth companies to disclose the compensation of our chief executive officer and other two most highly compensated executive officers on an individual, rather than an aggregate, basis. However, under Dutch law, we are required to disclose the compensation of our chief executive officer, being a member of our Board, on an individual basis.

The aggregate compensation, including benefits in kind, accrued or paid to members of our Board and Senior Management with respect to the year ended December 31, 2020 for services in all capacities was approximately €4,515,158. For the year ended December 31, 2020, we paid Mr. Modig, our Chief Executive Officer and Executive Director, €759,868 in compensation and benefits in kind.

The table below shows the remuneration paid to certain individual members of the Board for the year ended December 31, 2020 in such capacity.

|  | Base salary |  |  | Total remuneration |
Mr. Modig |  | € | 404,000 |  |  | € | 759,868 |

Share Ownership of our Board and Senior Management

The table below sets forth the share ownership of our Board and Senior Management as of February 1, 2021. Messrs. Droller, Gaster and Kleijwegt have agreed or are otherwise obligated to transfer all or a

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portion of the compensation they receive for their service as directors to the shareholders with which they are affiliated. The below table gives effect to the automatic conversion of preferred shares outstanding on February 1, 2021.

|  | Number of Ordinary Shares |  |  | Percentage of Shares Outstanding |  |  | Voting Rights |
Mr. Modig(1) |  |  | 1,200,000 |  |  |  | 5.0914 | % |  |  |  | (5)
Dr. Knolle |  |  | 1,200,000 |  |  |  | 5.0914 | % |  |  |  | (5)
Mr. Schikan |  |  | 500,000 |  |  |  | 2.1214 | % |  |  |  | (5)
Dr. Lesage(2) |  |  | 250,000 |  |  |  | 1.0607 | % |  |  |  | (5)
Mr. Droller(3) |  |  | 1,339,243 |  |  |  | 5.6822 | % |  |  |  | (5)
Mr. Gaster |  |  | — |  |  |  | — |  |  |  |  | (5)
Mr. Kleijwegt(4) |  |  | 3,607,566 |  |  |  | 15.3062 | % |  |  |  | (5)
Dr. Glassman |  |  | — |  |  |  | — |  |  |  |  | (5)
Dr. Meeker |  |  | — |  |  |  | — |  |  |  |  | (5)

(1) | Represents ordinary shares held by Schoodic Management B.V., an entity controlled by Mr. Modig.

(2) | Represents ordinary shares held by GrayMatters Consulting BVBA, an entity controlled by Dr. Lesage.

(3) | Represents 1,339,243 preferred shares which will be automatically converted into 1,339,243 ordinary shares immediately prior to the consummation of this offering. KURMA BIOFUND II is managed by its management company, Kurma Partners S.A and Mr. Droller controls Kurma Partners S.A.

(4) | Represents 3,607,566 preferred shares which will be automatically converted into 3,607,566 ordinary shares immediately prior to the consummation of this offering. The managing director of LSP V Coöperatieve U.A. is LSP V Management B.V. Mr. Kleijwegt is a managing director of LSP V Management B.V. and may be deemed to have voting and investment power over the shares held by LSP V Coöperatieve U.A. Mr. Kleijwegt disclaims beneficial ownership of such shares except to the extent of their pecuniary interest therein.

(5) | Each ordinary share carries one vote per share.

Option Ownership of our Board and Senior Management

The table below sets forth the option ownership of our Board and Senior Management as of February 1, 2021. The below table gives effect to the automatic conversion of preferred shares outstanding on February 1, 2021.

|  | Options |  |  | Percentage of Shares Outstanding |  |  | Percentage of Fully Diluted |
Mr. Modig |  |  | 150,000 |  |  |  | 0.64 | % |  |  | 0.57 | %
Dr. Knolle |  |  | 150,000 |  |  |  | 0.64 | % |  |  | 0.57 | %
Dr. Lesage |  |  | 150,000 |  |  |  | 0.64 | % |  |  | 0.57 | %
Dr. Conn |  |  | 150,000 |  |  |  | 0.64 | % |  |  | 0.57 | %
Dr. Lu |  |  | 440,000 |  |  |  | 1.87 | % |  |  | 1.66 | %
Dr. Glassman |  |  | 27,000 |  |  |  | 0.11 | % |  |  | 0.10 | %
Dr. Meeker |  |  | 80,000 |  |  |  | 0.34 | % |  |  | 0.30 | %

Equity Incentive Plan

In 2016, the Company adopted an Equity Incentive Plan, or the Plan in order to advance the interests of the Company and its stakeholders by enhancing the Company’s ability to attract, retain and motivate persons who are expected to make important contributions to the Company and by providing incentives for such persons to exert maximum efforts for the success of the Company and provide a means by which eligible individuals may benefit from increases in the value of the Company’s shares. The Company anticipates amending and restating the Plan in connection with the offering. As of February 1, 2021, there were 1,193,474 shares available for issuance under the Plan.

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The Plan provides for the grant of the following types of Awards: (i) Incentive Stock Options, or ISOs, (ii) Nonstatutory Stock Options, or NSOs, (iii) Stock Appreciation Rights, or SARs, (iv) Restricted Stock Awards, or RSAs, (v) RSUs, (vi) Performance Stock Awards, or PSAs, (vii) Performance Cash Awards, or PCAs, and (viii) Other Stock Awards.

As of February 1, 2021, the total number of ISOs and NSOs held by the Board and Senior Management and other employees is 1,572,295 with a weighted average exercise price of €2.22 per share. None of these options have been exercised.

As of February 1, 2021, the total number of RSUs held by Senior Management and other employees is 154,945.

2021 Equity Incentive Plan

In order to incentivize our directors and employees, our Board will adopt the Pharvaris N.V. 2021 Equity Incentive Plan (the “2021 Plan”) for employees, consultants and directors prior to the completion of this offering. The 2021 Plan will become effective upon our conversion from Pharvaris B.V. into Pharvaris N.V., which will occur prior to the consummation of this offering. The 2021 Plan will provide for the grant of options, stock appreciation rights, restricted stock, restricted stock units, performance stock awards, other stock-based awards, performance cash awards and substitute awards intended to help us secure and retain the services of eligible award recipients, provide incentives for such persons to exert maximum efforts for our success and provide a means by which eligible recipients may benefit from increases in the value of our ordinary shares.

Securities to be Offered

Subject to adjustment in the event of certain transactions or changes of capitalization in accordance with the 2021 Plan, ordinary shares equal to 9% of the Company’s issued share capital as of the date of the consummation of the IPO will initially be reserved for issuance pursuant to awards under the 2021 Plan. The total number of ordinary shares reserved for issuance under the 2021 Plan will be increased on January 1 of each calendar year during the term of the 2021 Plan, by the lesser of (i) 4% of the total number of shares outstanding as of the date of increase or (ii) such number of ordinary shares determined by our board of directors. No more than the number of shares initially reserved under the 2021 Plan multiplied by 1.480244285 may be issued pursuant to incentive stock options. Ordinary shares subject to an award that expires or is canceled, forfeited, exchanged, repurchased, settled in cash or otherwise terminated without delivery of shares and ordinary shares withheld to pay the exercise price of, or to satisfy the withholding obligations with respect to, an award will again be available for delivery pursuant to other awards under the 2021 Plan.

Administration

The 2021 Plan will be administered by our board of directors, except to the extent our board of directors elects a committee of directors to administer the 2021 Plan (as applicable, the “Committee”). The Committee has broad discretion to administer the 2021 Plan, including the power to determine the eligible individuals to whom awards will be granted, the number and type of awards to be granted and the terms and conditions of awards. The Committee may also accelerate the vesting or exercise of any award and make all other determinations and to take all other actions necessary or advisable for the administration of the 2021 Plan. To the extent the Committee is not our board of directors, our board of directors will retain the authority to take all actions permitted by the Committee under the 2021 Plan.

Eligibility

Our employees, consultants and directors, and employees, consultants and directors of our affiliates, will be eligible to receive awards under the 2021 Plan.

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Types of Awards

Options and SARs. We may grant options to eligible persons, except that incentive stock options may only be granted to persons who are our employees or employees of one of our subsidiaries (or, in theory, a parent corporation), in accordance with Section 422 of the Code. We may also grant stock appreciation rights (“SARs”). A SAR is the right to receive an amount equal to the excess of the fair market value of one ordinary share on the date of exercise over the grant price of the SAR, payable in shares of common stock, in cash, or in any combination of the two, as determined by the Committee. SARs may be granted in connection with, or independent of, other awards. The exercise price of an option or SAR generally cannot be less than 100% of the fair market value of an ordinary share on the date on which the option or SAR is granted and the option or SAR must not be exercisable for longer than ten years following the date of grant. In the case of an incentive stock option granted to an individual who owns (or is deemed to own) at least 10% of the total combined voting power of all classes of our shares or the shares of our subsidiaries (or, in theory, a parent corporation), the exercise price of the option must be at least 110% of the fair market value of an ordinary share and the option must not be exercisable more than five years from the date of grant. The Committee will have the discretion to determine other terms and conditions of an option or SAR award.

Restricted Stock Awards. A restricted stock award is a grant of ordinary shares subject to the restrictions on transferability and risk of forfeiture imposed by the Committee. As determined by the Committee and specified in the applicable award agreement, the holder of a restricted stock award may have rights as a shareholder, including the right to vote the ordinary shares subject to the restricted stock award or to receive dividends on the ordinary shares subject to the restricted stock award during the restriction period. In the discretion of the Committee, dividends distributed prior to vesting may be subject to the same restrictions and risk of forfeiture as the restricted shares with respect to which the distribution was made.

Restricted Stock Units. An RSU is a right to receive ordinary shares. However, RSUs may be settled in ordinary shares, their cash equivalent or any combination of the foregoing, as determined by the Committee. RSUs may be subject to the restrictions, including a risk of forfeiture, imposed by the Committee. Dividend equivalents may be granted in connection with RSUs and may entitle a participant to receive cash or ordinary shares equal in value to dividends or other distributions paid with respect to a specified number of ordinary shares. In the discretion of the Committee, such dividend equivalents may be paid currently or credited to an account for the participant, settled in cash or ordinary shares and subject to the same restrictions and risk of forfeiture as the RSU with respect to which the dividend equivalents are granted.

Other Stock Awards. Other stock awards are awards denominated or payable in, valued in whole or in part by reference to, or otherwise based on or related to, the value of our ordinary shares.

Performance Awards. Performance Awards are cash or stock awards that are payable, are granted, vest or may be exercised contingent upon the attainment of certain performance goals during a specified performance period.

Certain Transactions

If any change is made to our capitalization, such as a share split, share combination, share dividend, exchange of shares or other recapitalization, merger or otherwise, which results in an increase or decrease in the number of outstanding ordinary shares, appropriate adjustments will be made by the Committee to the available shares under the 2021 Plan and in the shares subject to an award under the 2021 Plan. The Committee will also have the discretion to make certain adjustments to awards in the event of a change in control, such as accelerating the vesting or exercisability of an award, requiring the surrender of an award, with or without consideration, or making any other adjustment or modification to the award that the Committee determines is appropriate in light of such transaction.

Clawback

All awards granted under the 2021 Plan will be subject to reduction, cancelation or recoupment under any written clawback policy that we may adopt and that we determine should apply to awards under the 2021 Plan.

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Plan Amendment and Termination

Our Committee may amend or terminate any award, award agreement or the 2021 Plan at any time; however, shareholder approval will be required for any amendment to the extent necessary to comply with applicable law or exchange listing standards. Notwithstanding the foregoing, no amendment of the 2021 Plan will materially impair a participant’s rights under an outstanding award unless (i) the Company requests the consent of the affected participant, and (ii) such participant consents in writing. The 2021 Plan will remain in effect for a period of ten years (unless earlier terminated by our board of directors).

Grants in Connection with Offering

In connection with this offering, we expect to grant our executive officers and directors stock options to purchase an aggregate of 873,000 ordinary shares in accordance with the terms of the 2016 Plan and the terms and conditions of award agreements evidencing such grants. The exercise price per share will be the initial public offering price per share.

Employment and Consulting Agreements with Senior Management

We have entered into written employment or service agreements with each member of our Senior Management. See “Related Party Transactions—Agreements and Arrangements with Senior Management” for additional information.

Board Service Contracts

Currently, there are no arrangements or understandings between us, on the one hand, and any of our directors, on the other hand, providing for benefits upon termination of their employment or service as directors of the Company. Following the consummation of this offering, we anticipate entering into service contracts with our non-executive directors that memorialize the terms of their compensation, duties and obligations to the Company.

Insurance and Indemnification

Under Dutch law, members of the Board may be held liable for damages in the event of improper or negligent performance of their duties. They may be held jointly and severally liable for damages to the Company and to third parties for infringement of the Articles of Association or of certain provisions of Dutch law. In certain circumstances, they may also incur additional specific civil and criminal liabilities.

Members of the Board, Senior Management, certain other of our officers and certain subsidiaries are insured under an insurance policy against damages resulting from their conduct when acting in the capacities as such members or officers.

The Articles of Association provide for an indemnity for current and former members of the Board and such current and former officers and employees of the Company as designated by the Board, collectively, the Indemnified Persons. The Company shall indemnify all Indemnified Persons against any financial losses or damages incurred by such person and any expense reasonably paid or incurred by such person in connection with any threatened, pending or completed suit, claim, action or legal proceedings of a civil, criminal, administrative or other nature, formal or informal, in which such person becomes involved to the extent this relates to his current or former position with the Company and/or a group company and in each case to the extent permitted by applicable law. No indemnification shall be given to an Indemnified Person: (a) if a competent court or arbitral tribunal has established, without having (or no longer having) the possibility for appeal, that the acts or omissions of such Indemnified Person that led to the financial losses, damages, expenses, suit, claim, action or legal proceedings are of an unlawful nature (including acts or omissions which are considered to constitute malice, gross negligence, intentional recklessness and/or serious culpability attributable to such Indemnified Person); (b) to the extent that the Indemnified Person’s financial losses, damages and expenses are covered under

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insurance and the relevant insurer has settled, or has provided reimbursement for, these financial losses, damages and expenses (or has irrevocably undertaken to do so); (c) in relation to proceedings brought by such Indemnified Person against the Company, except for proceedings brought to enforce indemnification to which the Indemnified Person is entitled pursuant to the Articles of Association of the Company, any indemnification agreement entered into with such Indemnified Person which has been approved by the Board, or pursuant to insurance taken out by the Company for the benefit of such Indemnified Person; or (d) for any financial losses, damages, or expenses incurred in connection with a settlement of any proceedings effected without the Company’s prior consent.

Dutch Corporate Governance

As a listed Dutch public company with limited liability (naamloze vennootschap), we will be subject to the DCGC. The DCGC contains both principles and best practice provisions for boards of directors, shareholders and general meetings, financial reporting, auditors, disclosure, compliance and enforcement standards. A copy of the DCGC can be found on www.mccg.nl. The DCGC is based on a “comply or explain” principle. Accordingly, as a Dutch company listed on a stock exchange, we will be required to disclose in our statutory annual Board report to what we extent comply with the principles and best practice provisions of the DCGC, and where we do not (for example, because of a conflicting Nasdaq requirement or otherwise), we must state why and to what extent we deviate in our statutory annual Board report. Our most substantial deviations from the DCGC are summarized below, but we cannot exclude the possibility of deviating from additional provisions of the DCGC, including after the date hereof and including in order to follow market practice or governance practices in the United States.

Under our Articles of Association that will be effective upon consummation of this offering, directors are be appointed on the basis of a binding nomination prepared by the Board. This means that the nominee will be appointed to the Board, unless the general meeting overrules the binding nature of the nomination (in which case a new nomination will be prepared for a subsequent general meeting). Our Articles of Association that will be effective upon consummation of this offering will provide that the general meeting can only pass such resolution by at least a two-thirds majority of the votes cast, provided such majority represents more than half of the issued share capital. However, the DCGC recommends that the general meeting should be capable of passing such a resolution by a simple majority of votes cast, representing no more than one-third of the issued share capital.

Under the Articles of Association that will be effective upon consummation of this offering, directors can only be dismissed by the general meeting by simple majority of votes cast, provided that the Board proposes the dismissal. In other cases, the general meeting can only pass such resolution by a two-thirds majority representing more than half of the issued share capital. The DCGC recommends that the general meeting can pass a resolution to dismiss a director by simple majority, representing no more than one-third of the issued share capital.

The DCGC recommends against providing equity awards as part of the compensation of a non-executive director. However, we expect to deviate from this recommendation and grant equity awards to our non-executive directors, consistent with U.S. market practice.

Our Plan allows us to set the terms and conditions of equity awards granted thereunder. Under the Plan, we may grant ordinary shares that are not subject to a lock-up period of at least five years after the date of grant, and we may grant options without restricting the exercisability of those options during the first three years after the date of grant. In those cases, this would cause additional deviations from the DCGC.

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PRINCIPAL SHAREHOLDERS

The following table presents information relating to the beneficial ownership of Pharvaris’ ordinary shares as of February 1, 2021, by:

| • |  | each person, or group of affiliated persons, known by us to own beneficially 5% or more of our outstanding ordinary shares;

| • |  | each member of our Board and Senior Management; and

| • |  | all members of our Board and Senior Management as a group.

The number of ordinary shares beneficially owned by each entity, person and member of Pharvaris’ Board or Senior Management is determined in accordance with the rules of the SEC, and the information is not necessarily indicative of beneficial ownership for any other purpose. Under such rules, beneficial ownership includes any ordinary shares over which the individual has sole or shared voting power or investment power as well as any ordinary shares that the individual has the right to acquire within 60 days of February 1, 2021 through the exercise of any option, warrant or other right. Except as otherwise indicated, and subject to applicable community property laws, the persons named in the table have sole voting and investment power with respect to all ordinary shares held by that person.

The percentage of outstanding ordinary shares is computed on the basis of 23,569,276 ordinary shares outstanding as of February 1, 2021, which reflects automatic conversion of all of our outstanding preferred shares into an aggregate of 18,719,276 ordinary shares immediately prior to the consummation of Pharvaris’ initial public offering. Ordinary shares that a person has the right to acquire within 60 days of February 1, 2021 are deemed outstanding for purposes of computing the percentage ownership of the person holding such rights, but are not deemed outstanding for purposes of computing the percentage ownership of any other person, except with respect to the percentage ownership of all members of the Board and Senior Management as a group. The table below does not reflect the IPO Grants or any ordinary shares that may be purchased in this offering, including through the directed share program described under “Underwriting—Directed Share Program.” Unless otherwise indicated below, the address for each beneficial owner is c/o Pharvaris B.V., J.H. Oortweg 21, 2333 CH Leiden, The Netherlands.

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|  | Ordinary Shares Beneficially Owned Prior to the Offering |  |  | Ordinary Shares Beneficially Owned Following the Offering Assuming No Exercise of Underwriters’ Overallotment Option |
Name of Beneficial Owner |  | Number of Shares |  |  | Percentage of Class |  |  | Number of Shares |  |  | Percentage of Class |
5% Beneficial Owner: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
LSP V Coöperatieve U.A.(1) |  |  | 3,607,566 |  |  |  | 15.31 | % |  |  | 3,607,566 |  |  |  | 11.33 | %
KURMA BIOFUND II(2) |  |  | 1,339,243 |  |  |  | 5.68 | % |  |  | 1,339,243 |  |  |  | 4.21 | %
Entities affiliated with Foresite Capital(3) |  |  | 3,626,068 |  |  |  | 15.38 | % |  |  | 3,626,068 |  |  |  | 11.39 | %
Entities affiliated with Bain Capital Life Sciences Investors, LLC(4) |  |  | 2,930,601 |  |  |  | 12.43 | % |  |  | 2,930,601 |  |  |  | 9.20 | %
venBio Global Strategic Fund III, L.P.(5) |  |  | 2,003,310 |  |  |  | 8.50 | % |  |  | 2,003,310 |  |  |  | 6.29 | %
Entities affiliated with Idinvest Partners S.A(6) |  |  | 1,455,153 |  |  |  | 6.17 | % |  |  | 1,455,153 |  |  |  | 4.57 | %
Jens Schneider-Mergener |  |  | 1,200,000 |  |  |  | 5.09 | % |  |  | 1,200,000 |  |  |  | 3.77 | %
Viking Global Opportunities Illiquid Investments Sub-Master LP(7) |  |  | 1,420,155 |  |  |  | 6.03 | % |  |  | 1,420,155 |  |  |  | 4.46 | %
General Atlantic PH B.V.(8) |  |  | 1,420,155 |  |  |  | 6.03 | % |  |  | 1,420,155 |  |  |  | 4.46 | %
Board and Senior Management: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mr. Modig(9) |  |  | 1,246,875 |  |  |  | 5.28 | % |  |  | 1,246,875 |  |  |  | 3.91 | %
Mr. Droller(2) |  |  | 1,339,243 |  |  |  | 5.68 | % |  |  | 1,339,243 |  |  |  | 4.21 | %
Dr. Gaster |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Mr. Schikan. |  |  | 500,000 |  |  |  | 2.12 | % |  |  | 500,000 |  |  |  | 1.57 | %
Mr. Kleijwegt(1) |  |  | 3,607,566 |  |  |  | 15.31 | % |  |  | 3,607,566 |  |  |  | 11.33 | %
Dr. Meeker |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Dr. Glassman |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Dr. Knolle(10) |  |  | 1,246,875 |  |  |  | 5.28 | % |  |  | 1,246,875 |  |  |  | 3.91 | %
Dr. Lu(11) |  |  | 133,833 |  |  |  |  | * |  |  | 133,833 |  |  |  | * |
Dr. Lesage(12) |  |  | 296,875 |  |  |  | 1.26 | % |  |  | 296,875 |  |  |  | * |
Dr. Conn(13) |  |  | 72,170 |  |  |  |  | * |  |  | 72,170 |  |  |  | * |
Ms. Nijdam |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
All executive officers and board members as a group (12 persons) |  |  | 8,443,437 |  |  |  | 35.30 | % |  |  | 8,443,437 |  |  |  | 26.23 | %

* | Indicates beneficial ownership of less than 1% of total outstanding ordinary shares.

(1) | Represents 3,607,566 preferred shares which will be automatically converted into 3,607,566 ordinary shares immediately prior to the consummation of this offering. The managing director of LSP V Coöperatieve U.A. is LSP V Management B.V. The managing directors of LSP V Management B.V. are Martijn Kleijwegt, Rene Kuijten and Joachim Rothe, each of whom may be deemed to have voting and investment power over the shares held by LSP V Coöperatieve U.A. Each of Mr. Kleijwegt, Mr. Kuijten and Mr. Rothe disclaims beneficial ownership of such shares except to the extent of their pecuniary interest therein. The address of LSP V Coöperatieve U.A. is Johannes Vermeerplein 9, 1071 DV Amsterdam, the Netherlands.

(2) | Represents 1,339,243 preferred shares which will be automatically converted into 1,339,243 ordinary shares immediately prior to the consummation of this offering. KURMA BIOFUND II is managed by its management company, Kurma Partners S.A. and Mr. Droller controls Kurma Partners S.A. The address of Kurma Partners S.A and Mr. Droller. is 24 Rue Royale, 75008, Paris, France.

(3) | Represents (i) 3,261,926 preferred shares held by Foresite Capital Fund IV, L.P. (“Foresite IV”), which will be automatically converted into 3,261,926 ordinary shares immediately prior to the consummation of this offering; and (ii) 364,142 preferred shares held by Foresite Capital Fund V, L.P. (“Foresite V” and, together with Foresite IV, “Foresite”), which will be automatically converted into 364,142 ordinary shares immediately prior to the consummation of this offering. Foresite Capital Management IV, LLC (“FCM IV”) is the general partner of Foresite IV and may be deemed to have sole voting and dispositive power over shares held by Foresite IV. Foresite Capital Management V, LLC (“FCM V”) is the general partner of

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| Foresite V and may be deemed to have sole voting and dispositive power over shares held by Foresite V. Dr. Jim Tananbaum is the sole managing member of FCM IV and FCM V and may be deemed to have sole voting and dispositive power over share held by Foresite. Each of FCM IV, FCM V and Dr. Tananbaum disclaims beneficial ownership of shares held by Foresite except to the extent of any pecuniary interest therein. The address of Foresite, FCM IV, FCM V and Dr. Tananbaum is 600 Montgomery Street, Suite 4500, San Francisco, CA 94111.

(4) | Represents (i) 2,658,480 preferred shares held by Bain Capital Life Sciences Fund, L.P. (“BCLS”), which will be automatically converted into 2,658,480 ordinary shares immediately prior to the consummation of this offering; and (ii) 272,121 preferred shares held by BCIP Life Sciences Associates, L.P. (“BCIP LS” and, together with BCLS, the “Bain Capital Life Sciences Entities”), which will be automatically converted into 272,121 ordinary shares immediately prior to the consummation of this offering. Bain Capital Life Sciences Investors, LLC, whose managers are Jeffrey Schwartz and Adam Koppel, is the ultimate general partner of BCLS and governs the investment strategy and decision-making process with respect to investments held by BCIP LS. As a result, each of Bain Capital Life Sciences Investors, LLC, Mr. Schwartz and Dr. Koppel may be deemed to share voting and dispositive power over the shares held by the Bain Capital Life Sciences Entities. The address of the Bain Capital Life Sciences Entities is c/o Bain Capital Life Sciences, LP 200 Clarendon Street, Boston, MA 02116.

(5) | Represents 2,003,310 preferred shares which will be automatically converted into 2,003,310 ordinary shares immediately prior to the consummation of this offering. The address of venBio Global Strategic Fund III, L.P. (“venBio”) is 1700 Owens Street Suite 595 San Francisco, CA 94158.

(6) | Represents (i) 84,410 preferred shares held by Idinvest Patrimoine n°4 IR (“Idinvest I”), which will be automatically converted into 84,410 ordinary shares immediately prior to the consummation of this offering; (ii) 451,409 preferred shares held by Objectif Innovation Patrimoine n°8 (“Idinvest II”), which will be automatically converted into 451,409 ordinary shares immediately prior to the consummation of this offering; (iii) 447,739 preferred shares held by Idinvest Patrimoine n°5 (“Idinvest III”), which will be automatically converted into 447,739 ordinary shares immediately prior to the consummation of this offering; (iv) 239,773 preferred shares held by Idinvest Patrimoine 2015 (“Idinvest IV”), which will be automatically converted into 239,773 ordinary shares immediately prior to the consummation of this offering; (v) 49,328 preferred shares held by Objectif Innovation Patrimoine n°9 (“Idinvest V”), which will be automatically converted into 49,328 ordinary shares immediately prior to the consummation of this offering; (vi) 41,684 preferred shares held by Idinvest Patrimoine n°6 (“Idinvest VI”), which will be automatically converted into 41,684 ordinary shares immediately prior to the consummation of this offering; (vii) 76,460 preferred shares held by Idinvest Patrimoine 2019 (“Idinvest VII”), which will be automatically converted into 76,460 ordinary shares immediately prior to the consummation of this offering; and (viii) 64,350 preferred shares held by Objectif Innovation 2019 (“Idinvest VIII” and, together with Idinvest I, Idinvest II, Idinvest III, Idinvest IV, Idinvest V, Idinvest VI and Idinvest VII, the “Idinvest Entities”), which will be automatically converted into 64,350 ordinary shares immediately prior to the consummation of this offering. The Idinvest Entities are controlled and managed by Idinvest Partners S.A. The address of Idinvest Partners S.A. is 117 Avenue des Champs Elysees, 75008, Paris, France.

(7) | Represents 1,420,155 preferred shares which will be automatically converted into 1,420,155 ordinary shares immediately prior to the consummation of this offering. Viking Global Opportunities Illiquid Investments Sub-Master LP (the “Opportunities Fund”) has the authority to dispose of and vote the shares directly owned by it, which power may be exercised by its general partner, Viking Global Opportunities Portfolio GP LLC (“Opportunities GP”), and by Viking Global Investors LP (“VGI”), which provides managerial services to the Opportunities Fund. O. Andreas Halvorsen, David C. Ott and Rose Shabet, as Executive Committee members of Viking Global Partners LLC (the general partner of VGI) and Opportunities GP, have shared authority to direct the voting and disposition of investments beneficially owned by VGI and the Opportunities GP. The business address of the Opportunities Fund is c/o Viking Global Investors LP, 55 Railroad Avenue, Greenwich, Connecticut 06830.

(8) | Represents 1,420,155 preferred shares which will be automatically converted into 1,420,155 ordinary shares immediately prior to the consummation of this offering. General Atlantic PH B.V. (“GA PH”) is a wholly owned subsidiary of General Atlantic Coöperatief U.A. (“GA Coop UA”). The members that share

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| beneficial ownership of the shares held by GA PH through GA Coop UA are the following General Atlantic investment funds (the “GA Funds”): General Atlantic Partners (Bermuda) IV, L.P. (“GAP Bermuda IV”), General Atlantic Partners (Bermuda) EU, L.P. (“GAP Bermuda EU”), General Atlantic Partners (Lux) SCSp (“GAP Lux”) and General Atlantic Cooperatief, L.P. (“GA Coop LP”). The general partner of GAP Lux is General Atlantic GenPar, (Lux) SCSp (“GA GenPar Lux”) and the general partner of GA GenPar Lux is General Atlantic (Lux) S.à r.l. (“GA Lux”). The general partner of GAP Bermuda IV and GAP Bermuda EU and the sole shareholder of GA Lux is General Atlantic GenPar (Bermuda), L.P. (“GenPar Bermuda”). GAP (Bermuda) Limited (“GAP (Bermuda) Limited”) is the general partner of GenPar Bermuda and GA Coop LP. There are nine members of the management committee of GAP (Bermuda) Limited (the “GA Management Committee”). GAP (Bermuda) Limited, GenPar Bermuda, GA Lux, GA GenPar Lux, and the GA Funds (collectively, the “GA Group”) are a “group” within the meaning of Rule 13d-5 of the Exchange Act. The address of GA Coop LP, GAP Bermuda IV, GAP Bermuda EU, GenPar Bermuda, and GAP (Bermuda) Limited is Clarendon House, 2 Church Street, Hamilton HM 11, Bermuda. The address of GA Coop UA is Raamplein 1, 1016 XK, Amsterdam, The Netherlands. The address of GAP Lux, GA GenPar Lux and GA Lux is Luxembourg is 412F, Route d’Esch, L-2086 Luxembourg. Each of the members of the GA Management Committee disclaims ownership of the shares except to the extent that he has a pecuniary interest therein.

(9) | Represents ordinary shares held by Schoodic Management B.V., an entity controlled by Mr. Modig. Consists of 46,875 options that vest within 60 days of February 1, 2021. See “Management—Equity Incentive Plan.”

(10) | Consists of 46,875 options that vest within 60 days of February 1, 2021. See “Management—Equity Incentive Plan.”

(11) | Consists of 133,833 options that vest within 60 days of February 1, 2021. See “Management—Equity Incentive Plan.”

(12) | Represents ordinary shares held by GrayMatters Consulting BVBA, an entity controlled by Dr. Lesage. Consists of 46,875 options that vest within 60 days of February 1, 2021. See “Management—Equity Incentive Plan.”

(13) | Consists of 25,295 RSUs that will vest upon consummation of this offering and 46,875 options that vest within 60 days of February 1, 2021.

As of February 1, 2021, after giving effect to the conversion of all of our preferred shares into ordinary shares, approximately 10.5 million of our outstanding ordinary shares are held by nine record holders in the United States. Upon the consummation of this offering, all ordinary shares will carry one voting right. We are not aware of any arrangement that may, at a subsequent date, result in a change of control of our Company.

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RELATED PARTY TRANSACTIONS

The following is a description of related-party transactions we have entered into since January 1, 2018 with any of the members of the Board, our Senior Management and the holders of more than 5% of our ordinary shares.

Transactions with Our Principal Shareholders

In August 2019 and July 2020, pursuant to that certain Share Subscription Agreement dated July 26, 2019 as amended on July 29, 2019 (the “2019 Share Subscription Agreement”), we issued to investors in two tranches a total of 7,650,147 Series B preferred shares for an aggregate investment amount of $66,000,000. Under the 2019 Share Subscription Agreement, we issued to Foresite IV a total of 2,897,783 Series B preferred shares for an aggregate investment amount of $25,000,000, to BCLS a total of 1,997,820 Series B preferred shares for an aggregate investment amount of $17,235,757, to BCIP LS a total of 204,496 Series B preferred shares for an aggregate investment amount of $1,764,243, to venBio a total of 1,275,025 Series B preferred shares for an aggregate investment amount of $11,000,000, to Venrock Healthcare Capital Partners III, L.P. (“Venrock I”) a total of 105,374 Series B preferred shares for an aggregate investment amount of $909,090.91, to VHCP Co-Investment Holdings III, LLC (“Venrock II”) a total of 10,537 Series B preferred shares for an aggregate investment amount of $90,909.09, to LSP V Coöperatieve U.A. a total of 811,379 Series B preferred shares for an aggregate investment amount of $7,000,000, to KURMA BIOFUND II a total of 115,911 Series B preferred shares for an aggregate investment amount of $1,000,000, to Idinvest V a total of 49,328 Series B preferred shares for an aggregate investment amount of $410,602.55, to Idinvest VI a total of 41,684 Series B preferred shares for an aggregate investment amount of $346,974.47, to Idinvest VII 76,460 Series B preferred shares for an aggregate investment amount of $674,632.61 and to Idinvest VIII 64,350 Series B preferred shares for an aggregate investment amount of $567,784.72.

In November 2020, pursuant to the Share Subscription Agreement dated November 3, 2020 (the “2020 Share Subscription Agreement”), we issued to investors a total of 5,826,279 Series C preferred shares for an aggregate investment amount of approximately $80 million. Under the 2020 Share Subscription Agreement, we issued to Foresite IV a total of 364,143 Series C preferred shares for an aggregate investment amount of $5,000,011.12, to Foresite V, a total of 364,142 Series C preferred shares for an aggregate investment amount of $4,999,997.39, to BCLS a total of 660,660 Series C preferred shares for an aggregate investment amount of $9,071,456.39, to BCIP LS a total of 67,625 Series C preferred shares for an aggregate investment amount of $928,552.11, to venBio a total of 728,285 Series C preferred shares for an aggregate investment amount of $10,000,008.51, to Venrock I a total of 197,118 Series C preferred shares for an aggregate investment amount of $ 2,706,607.55, to Venrock II a total of 19,707 Series C preferred shares for an aggregate investment amount of $270,594.85, to Venrock Healthcare Capital Partners Eg, L.P., a total of 220,146 Series C preferred shares for an aggregate investment amount of $3,022,802.71, to Opportunities Fund a total of 1,420,155 Series C preferred shares for an aggregate investment amount of $19,500,006.29, to General Atlantic PH B.V. a total of 1,420,155 Series C preferred shares for an aggregate investment amount of $19,500,006.29, to Cormorant Global Healthcare Master Fund, LP a total of 67,840 Series C preferred shares for an aggregate investment amount of $931,504.26, to Cormorant Private Healthcare Fund III, LP a total of 291,460 Series C Shares for an aggregate investment amount of $4,002,008.11, and to CRMA SPV, L.P. a total of 4,843 Series C Shares for an aggregate investment amount of $66,498.75.

Shareholders Agreement

On November 5, 2020, all of the then existing shareholders entered into the Second Amended and Restated Shareholders Agreement (the “Shareholders Agreement”), which governs board composition, transfer restrictions, preemptive rights and registration rights, among other matters. The Shareholders Agreement will terminate immediately prior to the consummation of this offering, other than customary registration rights provisions.

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Board composition. Our board is to consist of the chief executive officer, two members of appointed by the founders (however, provided that if the chief executive officer is a founder, the founders may only appoint one member), two members nominated by the holders of the Series A preferred shares, two members nominated by the holders of the Series B preferred shares and one additional non-executive member appointed by the general meeting with the approval of a majority the board.

Transfer restrictions. Certain transfer restrictions, including a right of first refusal as well as drag-along rights by holders of certain of our existing preferred shares, are provided for.

Anti-dilution/preemptive rights. Holders of preferred shares have anti-dilution protection in the event we issue shares at a price that is less than the original purchase price per preferred share. In the event such shares are issued, we are required to issue to the holders of the Series A preferred shares, Series B preferred shares and Series C preferred shares, unless waived, additional Series A preferred shares, Series B preferred shares and Series C preferred shares. This right does not apply in the event of an underwritten public offering of our shares. All existing shareholders also have preemptive rights in the event of any issuance of new shares. These rights are expected to be waived in connection with this offering.

Agreements and Arrangements with Senior Management

Dr. Knolle, who has served as Chief Scientific Officer and Chief Operating Officer since its inception, is a member of the board of Charité Research Organisation GmbH, or Charité CRO. The Company has entered into a service contract with Charité CRO according to which Charité CRO provides services supporting research for the Company. In fiscal years 2019 and 2020, payments to Charité CRO with respect to this service contract amounted to €1,238,355 and €1,025,795, respectively.

The Company engages several management entities for the purpose of providing key management services to the Company. These management entities are considered related parties, as they provide key management services and the key management personnel exercise key management functions within these entities. Certain key management personnel are also shareholders of the Company. In fiscal years 2019 and 2020 the aggregate amounts payable to these related parties was €55,250 and €398,489, respectively.

We have entered into Management Service Agreements with JCK-Consult/Dr. Knolle and GrayMatters Consulting B.V. dated August 1, 2020 (the “Consulting Agreements”). The Consulting Agreements provide for daily fixed fees up to a maximum amount per annum and an additional discretionary annual fee with a target based on a percentage of the maximum annual fee amount, determined at the discretion of the Company. The Consulting Agreements are for a term of four years but may be earlier terminated by either party without notice. Upon a termination of the agreement by the Company without cause, the consultant is entitled to (i) an amount equal to the expected sum of the services fee for the remaining period until the termination date, up to a specified amount, (ii) any unpaid discretionary fee for the prior year, and (iii) pro rata discretionary fee for the then-current year, subject to approval of the Company. The Consulting Agreements also contain certain restrictive covenants, including a perpetual confidentiality provision and covenants regarding non-solicitation of employees, consultants, independent contractors, suppliers and customers during the term of the agreement and for a period of one year thereafter. In the event a consultant breaches any of these covenants and does not remedy such breach within five business days of receiving written notice, such consultant will be required to pay the Company a lump sum penalty, plus an additional penalty for each day such breach continues.

We have also entered into employment agreements with Mr. Modig (Chief Executive Officer), Dr. Lu (Chief Medical Officer), Ms. Nijdam (Director of Finance) and Dr. Conn (Chief Business Officer) (collectively, the “Employment Agreements”). The Employment Agreements generally provide for base salary, sign-on bonuses, discretionary annual bonuses based on a percentage of base salary and eligibility to receive equity awards and to participate in the Company’s benefits plans. The Employment Agreements for Dr. Lu, Mr. Modig and Dr. Conn also provide that upon a termination by the Company without cause, by the executive for good

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reason, or as a result of the executive’s death or disability, the executive is entitled to the following (subject to execution of a general release of claims in favor of the Company): (i) 12 months of base salary, (ii) with respect to Dr. Lu and Dr. Conn, for one year after termination, the right to continue health care benefits under COBRA at active employee rates, (iii) any unpaid discretionary bonus for the prior year and (iv) pro rata discretionary bonus for the current year, subject to Board approval. In addition, the employment agreements with Mr. Modig and Dr. Conn originally entitled each executive to a special bonus upon the consummation of a change in control (or a qualified IPO for Dr. Conn) on or before the 18-month anniversary of each executive’s start date. However, each of Mr. Modig and Dr. Conn entered into an amendment to their employment agreement, whereby each executive agreed to waive, surrender and relinquish all rights to such special bonuses.

Indemnification Agreements

We intend to enter into indemnification agreements with the members of our Board. The indemnification agreements and our Articles of Association require us to indemnify the members of our Board against financial losses or damages or any expense reasonable paid or incurred in connection with any threatened, pending, or completed suit, claim, action or legal proceeding, in each case to the extent permitted by law, subject to certain exceptions.

Directed Share Program

At our request, the underwriters have reserved up to 5% of the ordinary shares offered by this prospectus, for sale at the initial public offering price through a directed share program to certain individuals, including our directors, officers, employees, and certain friends and family members of these persons.

Public Offering Participation Rights

We entered into letter agreements in November 2020 with General Atlantic and Viking Global Investors, each a beneficial owner of more than 5% of our share capital. The letter agreements require us to use our commercially reasonable efforts to advocate to the managing underwriters of this offering to offer each of General Atlantic and Viking Global Investors the opportunity to purchase a specified dollar value of shares in this offering at the initial offering price. The letter agreements also provide that if General Atlantic and Viking Global Investors are not afforded such opportunity, the Company will offer each of GA and Viking Global Investors the right to purchase the specified value of shares in a private placement. Each of General Atlantic and Viking Global Investors waived such rights prior to the commencement of this offering.

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DESCRIPTION OF SHARE CAPITAL AND ARTICLES OF ASSOCIATION

General

We were incorporated pursuant to the laws of the Netherlands as Pharvaris B.V. on September 30, 2015. Prior to the listing of our ordinary shares on Nasdaq, we will convert into a public company with limited liability (naamloze vennootschap) under Dutch law and our legal name will change to Pharvaris N.V.

We are registered with the Trade Register of the Chamber of Commerce (Kamer van Koophandel) under number 64239411. Our corporate seat is in Leiden, the Netherlands, and our registered office is also in Leiden, the Netherlands.

The following is a summary of material information relating to our share capital upon and following the consummation of this offering. The summaries of the Articles of Association as set forth in this prospectus are qualified in their entirety by reference to the full text of the Articles of Association included in this registration statement.

Share Capital

Upon the consummation of this offering, our authorized share capital will amount to €14,100,000, divided into 58,750,000 ordinary shares, each with a nominal value of €0.12, and 58,750,000 preferred shares, each with a nominal value of €0.12, and our issued share capital will amount to €3,820,773. Our ordinary shares have been approved for listing on the Nasdaq Global Select Market under the symbol “PHVS.”

Under Dutch law, our authorized share capital is the maximum capital that we may issue without amending our Articles of Association. An amendment of our Articles of Association would require a resolution of the general meeting upon proposal by the Board.

Initial settlement of the ordinary shares issued in this offering will take place at the consummation of this offering through The Depository Trust Company, or DTC, in accordance with its customary settlement procedures for equity securities. Each person owning ordinary shares held through DTC must rely on the procedures thereof and on institutions that have accounts therewith to exercise any rights of a holder of the ordinary shares.

Upon the consummation of this offering, our Articles of Association will provide that, for as long as any of our ordinary shares are admitted to trading on Nasdaq, the New York Stock Exchange or on any other regulated stock exchange operating in the United States, the laws of the State of New York shall apply to the property law aspects of the ordinary shares reflected in the register administered by our transfer agent, subject to certain overriding exceptions under the Dutch Civil Code.

Articles of Association and Dutch law

Set forth below is a summary of relevant information concerning our share capital and material provisions of our Articles of Association that will be effective upon the consummation of this offering and applicable Dutch law. This summary does not constitute legal advice regarding those matters and should not be regarded as such.

Ordinary Shares

The following summarizes the main rights of holders of our ordinary shares:

| • |  | each holder of ordinary shares is entitled to one vote per share on all matters to be voted on by shareholders generally, including the appointment of directors;

| • |  | there are no cumulative voting rights;

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| • |  | the holders of our ordinary shares are entitled to dividends and other distributions as may be declared from time to time by us out of funds legally available for that purpose, if any, following payment of the preferred dividend if any preferred shares are or have been outstanding (to the extent holders or former holders of preferred shares are entitled to such distribution under our Articles of Association);

| • |  | upon our liquidation, dissolution or winding-up, the holders of ordinary shares will be entitled to share ratably in the distribution of all of our assets remaining available for distribution after satisfaction of all our liabilities, following payment of the preferred dividend if any preferred shares are or have been outstanding (to the extent holders or former holders of preferred shares are entitled to such distribution under our Articles of Association); and

| • |  | the holders of ordinary shares have preemptive rights in case of share issuances or the grant or rights to subscribe for shares, except if such rights are limited or excluded by the corporate body authorized to do so and except in such cases as provided by Dutch law and our Articles of Association.

Company’s Shareholders’ Register

We must keep our shareholders’ register accurate and current. The Board keeps our shareholders’ register and records names and addresses of all holders of shares, showing the date on which the shares were acquired, the date of the acknowledgement by or notification of us as well as the amount paid on each share. The register also includes the names and addresses of those with a right of usufruct (vruchtgebruik) in shares belonging to another or a pledge (pandrecht) in respect of such shares. The ordinary shares offered in this offering will be held through DTC, therefore DTC or its nominee will be recorded in the shareholders’ register as the holder of those ordinary shares.

Our ordinary shares and preferred shares shall be in registered form (op naam). We may issue share certificates (aandeelbewijzen) for registered shares in such form as may be approved by our Board.

Corporate Objectives

Pursuant to the Articles of Association, our main corporate objectives are:

| • |  | to discover, develop and commercialize treatments, including for hereditary angioedema;

| • |  | to engage, in any way whatsoever, in trading activities (retail and wholesale), the import, export, purchase, sale and distribution of products, including, but not limited to, pharmaceutical products, and other related (raw material) products and to render operational and supporting services to its group companies in connection herewith;

| • |  | to develop and trade in patents, trademarks, licenses, knowhow, copyrights, data base rights and other intellectual property rights;

| • |  | to participate in, finance or hold any other interest in, or to conduct the management of, other legal entities, partnerships or enterprises;

| • |  | to furnish guarantees, to provide security, to warrant performance in any other way and to assume liability, whether jointly and severally or otherwise, in respect of obligations of group companies or other parties; and

| • |  | to do anything which, in the widest sense, is connected with or may be conducive to the objects described above.

Limitations on the Rights to Own Ordinary Shares

Our ordinary shares may be issued to individuals, corporations, trusts, estates of deceased individuals, partnerships and unincorporated associations of persons. Our Articles of Association contain no limitation on the

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rights to own our ordinary shares and no limitation on the rights of nonresidents of the Netherlands or foreign shareholders to hold or exercise voting rights. Following the consummation of this offering, our preferred shares shall only be issued to the protective foundation, if and when incorporated.

Limitation on Liability and Indemnification Matters

Under Dutch law, directors may be held liable for damages in the event of improper or negligent performance of their duties. They may be held jointly and severally liable for damages to the Company and to third parties for infringement of the Articles of Association or of certain provisions of Dutch law. In certain circumstances, they may also incur additional specific civil and criminal liabilities. Subject to certain exceptions, our Articles of Association provide for indemnification of our current and former directors (and other current and former officers and employees as designated by our Board). No indemnification shall be given to an indemnified person:

| • |  | if a competent court or arbitral tribunal has established, without having (or no longer having) the possibility for appeal, that the acts or omissions of such indemnified person that led to the financial losses, damages, expenses, suit, claim, action or legal proceedings as described above are of an unlawful nature (including acts or omissions which are considered to constitute malice, gross negligence, intentional recklessness and/or serious culpability attributable to such indemnified person);

| • |  | to the extent that his or her financial losses, damages and expenses are covered under insurance and the relevant insurer has settled, or has provided reimbursement for, these financial losses, damages and expenses (or has irrevocably undertaken to do so);

| • |  | in relation to proceedings brought by such indemnified person against the Company, except for proceedings brought to enforce indemnification to which he is entitled pursuant to our Articles of Association, pursuant to an agreement between such indemnified person and the Company which has been approved by the Board or pursuant to insurance taken out by the Company for the benefit of such indemnified person; or

| • |  | for any financial losses, damages or expenses incurred in connection with a settlement of any proceedings effected without the Company’s prior consent.

Under our Articles of Association, our Board may stipulate additional terms, conditions and restrictions in relation to the indemnification described above.

Shareholders’ Meetings and Consents

General meeting

General meetings may be held in Amsterdam, Arnhem, Assen, The Hague, Haarlem, s-Hertogenbosch, Groningen, Leeuwarden, Lelystad, Leiden, Maastricht, Middelburg, Rotterdam, Schiphol (Haarlemmermeer), Utrecht or Zwolle, all in the Netherlands. The annual general meeting must be held within six months of the end of each financial year. Additional extraordinary general meetings may also be held, whenever considered appropriate by the Board and shall be held within three months after our Board has considered it to be likely that our equity has decreased to an amount equal to or lower than half of its paid-up and called-up share capital, in order to discuss the measures to be taken if so required.

Pursuant to Dutch law, one or more shareholders or others with meeting rights under Dutch law who jointly represent at least one-tenth of the issued share capital may request us to convene a general meeting, setting out in detail the matters to be discussed. If our Board has not taken the steps necessary to ensure that such meeting can be held within six weeks after the request, the requesting party/parties may, on their application, be authorized by the competent Dutch court in preliminary relief proceedings to convene a general meeting. The court shall disallow the application if it does not appear that the applicants have previously requested our Board to convene a general meeting and our Board has not taken the necessary steps so that the general meeting could be held within six weeks after the request.

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General meetings can be convened by an announcement published in a Dutch daily newspaper with national distribution. The notice must state the agenda, the time and place of the meeting, the record date (if any), the procedure for participating in the general meeting by proxy, as well as other information as required by Dutch law. The notice must be given at least 15 days prior to the day of the meeting. The agenda for the annual general meeting shall include, among other things, the adoption of the annual accounts, appropriation of our profits and proposals relating to the composition of the Board, including the filling of any vacancies in the Board. In addition, the agenda shall include such items as have been included therein by the Board. The agenda shall also include such items requested by one or more shareholders, or others with meeting rights under Dutch law, representing at least 3% of the issued share capital. Requests must be made in writing or by electronic means and received by the Board at least 60 days before the day of the meeting. No resolutions shall be adopted on items other than those that have been included in the agenda.

In accordance with the DCGC, and our Articles of Association, shareholders having the right to put item on the agenda under the rules described above, shall exercise such right only after consulting the Board in that respect. If one or more shareholders intend to request that an item be put on the agenda that may result in a change in the Company’s strategy (for example, the removal of directors), the Board must be given the opportunity to invoke a reasonable period to respond to such intention. Such period shall not exceed 180 days (or such other period as may be stipulated for such purpose by Dutch law and/or the DCGC from time to time). If invoked, the Board must use such response period for further deliberation and constructive consultation, in any event with the shareholders concerned, and must explore alternatives. At the end of the response time, the Board must report on this consultation and the exploration of alternatives to the general meeting. The response period may be invoked only once for any given general meeting and does not apply: (a) in respect of a matter for which a response period has been previously invoked; or (b) if a shareholder holds at least 75% of the Company’s issued share capital as a consequence of a successful public bid. The response period may also be invoked in response to shareholders or others with meeting rights under Dutch law requesting that a general meeting be convened, as described above.

The general meeting is presided over by the chairman of the Board. If no chairman has been elected or if he or she is not present at the meeting, the general meeting shall be presided over by the vice-Chairman. If no vice-Chairman has been elected or if he or she is not present at the meeting, the general meeting shall be presided over by the chief executive officer. If no chief executive officer has been elected or if he or she is not present at the meeting, the general meeting shall be presided over by another director present at the meeting. If no director is present at the meeting, the general meeting shall be presided over by any other person appointed by the general meeting. In each case, the person who should chair the general meeting pursuant to the rules described above may appoint another person to chair the general meeting instead. Directors may always attend a general meeting. In these meetings, they have an advisory vote. The chairman of the meeting may decide at his or her discretion to admit other persons to the meeting.

All shareholders and others with meeting rights under Dutch law are authorized to attend the general meeting, to address the meeting and, in so far as they have such right, to vote pro rata to his or her shareholding. Shareholders may exercise these rights, if they are the holders of shares on the record date, if any, as required by Dutch law, which is currently the 28th day before the day of the general meeting. Under our Articles of Association, shareholders and others with meeting rights under Dutch law must notify us in writing or by electronic means of their identity and intention to attend the general meeting. This notice must be received by us ultimately on the seventh day prior to the general meeting, unless indicated otherwise when such meeting is convened.

Quorum and voting requirements

Each ordinary share and each preferred share confers the right on the holder to cast one vote at the general meeting. Shareholders may vote by proxy. No votes may be cast at a general meeting on shares held by us or our subsidiaries or on shares for which we or our subsidiaries hold depository receipts. Nonetheless, the holders of a

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right of usufruct (vruchtgebruik) and the holders of a right of pledge (pandrecht) in respect of shares held by us or our subsidiaries in our share capital are not excluded from the right to vote on such shares, if the right of usufruct (vruchtgebruik) or the right of pledge (pandrecht) was granted prior to the time such shares were acquired by us or any of our subsidiaries. Neither we nor any of our subsidiaries may cast votes in respect of a share on which we or such subsidiary holds a right of usufruct (vruchtgebruik) or a right of pledge (pandrecht). Shares which are not entitled to voting rights pursuant to the preceding sentences will not be taken into account for the purpose of determining the number of shareholders that vote and that are present or represented, or the amount of the share capital that is provided or that is represented at a general meeting.

Decisions of the general meeting are taken by a simple majority of votes cast, except where Dutch law or our Articles of Association provide for a qualified majority or unanimity.

Board

Appointment of directors

Under our Articles of Association, the directors are appointed by the general meeting upon binding nomination by our Board, on a recommendation of our nomination and corporate governance committee. However, the general meeting may at all times overrule the binding nomination by a resolution adopted by at least a two-thirds majority of the votes cast, provided such majority represents more than half of the issued share capital. If the general meeting overrules the binding nomination, the Board shall make a new nomination.

At a general meeting, a resolution to appoint a director can only be passed in respect of candidates whose names are stated for that purpose in the agenda of that general meeting or in the explanatory notes thereto. Upon the appointment of a person as a director, the general meeting shall determine whether that person is appointed as executive director or as non-executive director.

Duties and liabilities of directors

Under Dutch law, the Board as a collective is responsible for our management, strategy, policy and operations. The executive directors manage our day-to-day business and operations and implement our strategy. The non-executive directors supervise the performance of the duties of our directors, our policy and our general course of affairs. Subject to certain limitations under Dutch law, the directors may divide their tasks among themselves in or pursuant to the internal rules applicable to the Board. Each director has a statutory duty to act in the corporate interest of the Company and its business. Under Dutch law, the corporate interest extends to the interests of all corporate stakeholders, such as shareholders, creditors, employees, customers and suppliers. The duty to act in the corporate interest of the Company also applies in the event of a proposed sale or break-up of the Company, provided that the circumstances generally dictate how such duty is to be applied and how the respective interests of various groups of stakeholders should be weighed. Any resolution of the Board regarding a material change in our identity or character requires approval of the general meeting.

Dividends and Other Distributions

Amount available for distribution

We may only make distributions, whether of profits or from our reserves, to our shareholders to the extent our shareholders’ equity (eigen vermogen) exceeds the sum of the paid-up and called-up share capital plus any reserves required by Dutch law or by our Articles of Association. Under our Articles of Association, if any preferred shares are or have been outstanding, the preferred dividend is first paid out of the profit, if available for distribution, to the holders or former holders, as applicable, of those preferred shares to the extent they are entitled to such distribution under our Articles of Association. Our Board may decide that all or part of our remaining profits are carried to reserves. After such reservation, any remaining profit will be at the disposal of the general meeting at the proposal of our Board for distribution on our ordinary shares, subject to the applicable restrictions of Dutch law.

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We only make a distribution of dividends to our shareholders after the adoption of our annual accounts demonstrating that such distribution is legally permitted. The Board is permitted, subject to certain requirements, to declare interim dividends without the approval of the general meeting.

Dividends and other distributions shall be made payable not later than the date determined by the Board. Claims to dividends and other distributions not made within five years from the date that such dividends or distributions became payable, will lapse and any such amounts will be considered to have been forfeited to us (verjaring).

Exchange controls

Under Dutch law, there are no exchange controls applicable to the transfer to persons outside of the Netherlands of dividends or other distributions with respect to, or of the proceeds from the sale of, shares of a Dutch company, subject to applicable restrictions under sanctions and measures, including those concerning export control, pursuant to European Union regulations, the Sanctions Act 1977 (Sanctiewet 1977) or other legislation, applicable anti-boycott regulations and similar rules. There are no special restrictions in the Articles of Association or Dutch law that limit the right of shareholders who are not citizens or residents of the Netherlands to hold or vote shares.

Squeeze-out procedures

A shareholder who alone or together with group companies holds at least 95% of our issued share capital for his or her own account may initiate proceedings against the other shareholders jointly for the transfer of their shares to such shareholder. The proceedings are held before the Enterprise Chamber of the Amsterdam Court of Appeal, or the Enterprise Chamber (Ondernemingskamer), and can be instituted by means of a writ of summons served upon each of the other shareholders in accordance with the provisions of the Dutch Code of Civil Procedure (Wetboek van Burgerlijke Rechtsvordering). The Enterprise Chamber may grant the claim for squeeze-out in relation to the other shareholders and will determine the price to be paid for the shares, if necessary after appointment of one or three experts who will offer an opinion to the Enterprise Chamber on the value to be paid for the shares of the other shareholders. Once the order to transfer becomes final before the Enterprise Chamber, the person acquiring the shares shall give written notice of the date and place of payment and the price to the holders of the shares to be acquired whose addresses are known to him. Unless the addresses of all of them are known to the acquiring person, such person is required to publish the same in a daily newspaper with a national circulation.

Dissolution and Liquidation

Under our Articles of Association, we may be dissolved by a resolution of the general meeting, subject to a proposal of the Board. In the event of a dissolution, the liquidation shall be effected by the Board, unless the general meeting decides otherwise. During liquidation, the provisions of our Articles of Association will remain in force as far as possible. To the extent that any assets remain after payment of all debts, if any preferred shares are or have been outstanding, a liquidation distribution equal to the preferred dividend is first paid out to the holders or former holders of those preferred shares (to the extent they are entitled to such distribution under our Articles of Association). Any remaining assets shall be distributed to the holders of ordinary shares in proportion to their ordinary shares.

Exclusive Forum

Our Articles of Association provide that the U.S. federal district courts shall be the sole and exclusive forum for any claim asserting a cause of action arising under the Securities Act. Section 22 of the Securities Act creates concurrent jurisdiction for federal and state courts over all such Securities Act actions. Accordingly, both state and federal courts have jurisdiction to entertain such claims. This choice of forum provision may limit a

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shareholder’s ability to bring a claim in a judicial forum that it finds favorable for disputes with us or our directors, officers or other employees and may increase the costs associated with such lawsuits, which may discourage such lawsuits against us and our directors, officers and employees. Alternatively, if a court were to find these provisions of our Articles of Association inapplicable to, or unenforceable in respect of, one or more of the specified types of actions or proceedings, we may incur additional costs associated with resolving such matters in other jurisdictions, which could adversely affect our business and financial condition. Any person or entity purchasing or otherwise acquiring any interest in our share capital shall be deemed to have notice of and to have consented to the choice of forum provisions of our articles of association described above.

Dutch Corporate Governance Code

As a listed Dutch public company (naamloze vennootschap), we will be subject to the DCGC. The DCGC contains both principles and best practice provisions on corporate governance that regulate relations between the Board and the general meeting and matters in respect of financial reporting, auditors, disclosure, compliance and enforcement standards. The DCGC is based on a “comply or explain” principle. Accordingly, companies are required to disclose in their statutory annual reports, filed in the Netherlands, whether they comply with the provisions of the DCGC. If they do not comply with these provisions (for example, because of a conflicting Nasdaq requirement), the Company is required to give the reasons for such noncompliance. See “Risk Factors—Risks Related to Our Ordinary Shares and This Offering—We are not obligated to, and do not, comply with all best practice provisions of the Dutch Corporate Governance Code.”

We do not comply with all principles and best practice provisions of the DCGC. As of the date of this prospectus, we deviate from the DCGC as summarized below, but cannot exclude the possibility of deviating from additional provisions of the DCGC, including after the date hereof in order to follow market practice or governance practices in the United States.

Under our Articles of Association, directors are to be appointed on the basis of a binding nomination prepared by the Board. This means that the nominee will be appointed to the Board, unless the general meeting removes the binding nature of the nomination (in which case a new nomination will be prepared for a subsequent general meeting). Our Articles of Association will provide that the general meeting can only pass such resolution by a two-thirds majority representing more than half of the issued share capital. However, the DCGC recommends that the general meeting can pass such a resolution by simple majority, representing no more than one-third of the issued share capital.

Under our Articles of Association, directors can only be dismissed by the general meeting by simple majority, provided that the Board proposes the dismissal. In other cases, the general meeting can only pass such resolution by a two-thirds majority representing more than half of the issued share capital. The DCGC recommends that the general meeting can pass a resolution to dismiss a director by simple majority, representing no more than one-third of the issued share capital.

The DCGC recommends against providing equity awards as part of the compensation of a non-executive director. However, we expect to deviate from this recommendation and grant equity awards to our non-executive directors, consistent with U.S. market practice.

Our Equity Incentive Plan allows us to set the terms and conditions of equity awards granted thereunder. Under the Equity Incentive Plan, we may grant ordinary shares that are not subject to a lock-up period of at least five years after the date of grant, and we may grant options without restricting the exercisability of those options during the first three years after the date of grant. In those cases, this would cause additional deviations from the DCGC.

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Dutch Financial Reporting Supervision Act

On the basis of the Dutch Financial Reporting Supervision Act (Wet toezicht financiële verslaggeving), or the FRSA, the Dutch Authority for the Financial Markets (Stichting Autoriteit Financiële Markten), or AFM supervises the application of financial reporting standards by Dutch companies whose securities are listed on a Dutch or foreign stock exchange.

Pursuant to the FRSA, the AFM has an independent right to (i) request an explanation from us regarding our application of the applicable financial reporting standards if, based on publicly known facts or circumstances, it has reason to doubt that the Company’s financial reporting meets such standards and (ii) recommend to us the making available of further explanations. If we do not comply with such a request or recommendation, the AFM may request that the Enterprise Chamber of the Amsterdam Court of Appeal (Ondernemingskamer) order us to (i) make available further explanations as recommended by the AFM (ii) provide an explanation of the way we have applied the applicable financial reporting standards to our financial reports or (iii) prepare or restate our financial reports in accordance with the Enterprise Chamber’s orders.

Comparison of Dutch Corporate Law and U.S. Corporate Law

The following comparison between Dutch corporate law, which applies to us, and Delaware corporation law, the law under which many publicly listed corporations in the United States are incorporated, discusses additional matters not otherwise described in this prospectus. Although we believe this summary is materially accurate, the summary is subject to Dutch law, including Book 2 of the Dutch Civil Code and the DCGC and Delaware corporation law, including the Delaware General Corporation Law.

Corporate Governance

Duties of directors

The Netherlands. We have a one-tier board structure consisting of one or more executive directors and one or more non-executive directors.

Under Dutch law, the board of directors as a collective is responsible for our management, strategy, policy and operations. The executive directors manage our day-to-day business and operations and implement our strategy. The non-executive directors supervise the performance of the duties of our directors, our policy and our general course of affairs. Subject to certain limitations under Dutch law, the directors may divide their tasks among themselves in or pursuant to the internal rules applicable to the board of directors. Each director has a statutory duty to act in the corporate interest of the Company and its business. Under Dutch law, the corporate interest extends to the interests of all corporate stakeholders, such as shareholders, creditors, employees, customers and suppliers. The duty to act in the corporate interest of the Company also applies in the event of a proposed sale or break-up of the Company, provided that the circumstances generally dictate how such duty is to be applied and how the respective interests of various groups of stakeholders should be weighed. Any resolution of the board of directors regarding a material change in our identity or character requires approval of the general meeting.

Delaware. The board of directors bears the ultimate responsibility for managing the business and affairs of a corporation. In discharging this function, directors of a Delaware corporation owe fiduciary duties of care and loyalty to the corporation and to its stockholders. Delaware courts have decided that the directors of a Delaware corporation are required to exercise informed business judgment in the performance of their duties. Informed business judgment means that the directors have informed themselves of all material information reasonably available to them. The duty of loyalty may be summarized as the duty to act in good faith, not out of self-interest, and in a manner that the director reasonably believes to be in the best interests of the stockholders. Under certain circumstances (such as defensive actions in response to a change of control), Delaware courts may also impose more rigorous standards of conduct upon directors of a Delaware corporation.

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Director terms

The Netherlands. The DCGC provides the following best practice recommendations on the terms for directors’ service:

| • |  | Executive directors should be appointed for a maximum period of four years, without limiting the number of consecutive terms executive directors may serve.

| • |  | Non-executive directors should be appointed for two consecutive periods of no more than four years. Thereafter, non-executive directors may be reappointed for a maximum of two consecutive periods of no more than two years, provided that in the event of reappointment after an eight-year term of office the reasons for such reappointment should be disclosed in the Company’s statutory annual Board report.

The general meeting shall at all times be entitled to suspend or remove a director. Under our Articles of Association, the general meeting may only adopt a resolution to suspend or remove such director by at least a two-thirds majority of the votes cast, provided such majority represents more than half of the issued share capital, unless the resolution is passed at the proposal of the board of directors, in which case a simple majority of the votes cast is sufficient.

Delaware. The Delaware General Corporation Law generally provides for a one-year term for directors, but permits directorships to be divided into up to three classes with up to three-year terms, with the years for each class expiring in different years, if permitted by the certificate of incorporation, an initial bylaw or a bylaw adopted by the stockholders. A director elected to serve a term on a “classified” board may not be removed by stockholders without cause. There is no limit in the number of terms a director may serve.

Director vacancies

The Netherlands. Our Board can temporarily fill vacancies in its midst caused by temporary absence or incapacity of directors without requiring a shareholder vote. If all of our directors are absent or incapacitated, our management shall be attributed to the person who most recently ceased to hold office as the chairman of our Board. If such former chairman would be unwilling or unable to accept that position, our management would be attributed to the person who most recently ceased to hold office as our chief executive officer. If such former chief executive officer would also be unwilling or unable to accept that position, our management would be attributed to one or more persons whom the general meeting would designate for that purpose. The person(s) charged with our management in this manner, may designate one or more persons to be charged with our management instead of, or together with, such person(s).

Under Dutch law, directors are appointed and reappointed by the general meeting, on a recommendation of our nomination and corporate governance committee. Under our Articles of Association, directors are appointed by the general meeting upon the binding nomination by our Board. However, the general meeting may at all times overrule the binding nomination by a resolution adopted by at least a two-thirds majority of the votes cast, provided such majority represents more than half of the issued share capital. If the general meeting overrules the binding nomination, the Board shall make a new nomination.

Delaware. The Delaware General Corporation Law provides that vacancies and newly created directorships may be filled by a majority of the directors then in office (even though less than a quorum) unless (i) otherwise provided in the certificate of incorporation or bylaws of the corporation or (ii) the certificate of incorporation directs that a particular class of stock is to elect such director, in which case any other directors elected by such class, or a sole remaining director elected by such class, will fill such vacancy.

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Conflict-of-interest transactions

The Netherlands. Under Dutch law and our Articles of Association, our directors shall not take part in any discussion or decision-making that involves a subject or transaction in relation to which he or she has a direct or indirect personal conflict of interest with us. Such a conflict of interest would generally arise if the director concerned is unable to serve our interests and the business connected with it with the required level of integrity and objectivity due to the existence of the conflicting personal interest. Our Articles of Association provide that if as a result of conflicts of interests no resolution of the Board can be adopted, the resolution may nonetheless be adopted by the Board as if none of the directors had a conflict of interest. In that case, each director is entitled to participate in the discussion and decision-making process and to cast a vote.

The DCGC provides the following best practice recommendations in relation to conflicts of interests:

| • |  | a director should report any potential conflict of interest in a transaction that is of material significance to the Company and/or to such director to the other directors without delay, providing all relevant information in relation to the conflict;

| • |  | the board of directors should then decide, outside the presence of the director concerned, whether there is a conflict of interest;

| • |  | transactions in which there is a conflict of interest with a director should be agreed on arms’ length terms; and

| • |  | a decision to enter into such a transaction in which there is a conflict of interest with a director that is of material significance to the Company and/or to such director shall require the approval of the board of directors, and such transactions should be disclosed in the Company’s annual board report.

Delaware. Under the Delaware General Corporation Law transactions involving a Delaware corporation and an interested director of that corporation would not be voidable if:

| • |  | the material facts as to the director’s relationship or interest are disclosed or known to the board of directors and the board in good faith authorizes the transaction by the affirmative vote of a majority of the disinterested directors;

| • |  | the material facts are disclosed or known as to the director’s relationship or interest and the transaction is specifically approved in good faith by vote of the majority of shares entitled to vote thereon; or

| • |  | the transaction is fair to the corporation at the time it is authorized by the board of directors, a committee of the board of directors or the stockholders.

Proxy voting by directors

The Netherlands. An absent director may issue a proxy for a specific board meeting but only to another director in writing or by electronic means.

Delaware. A director of a Delaware corporation may not issue a proxy representing the director’s voting rights as a director.

Shareholder Rights

Voting rights

The Netherlands. In accordance with Dutch law and our Articles of Association, each issued ordinary share and each issued preferred share confers the right to cast one vote at the general meeting. Each holder of shares may cast as many votes as it holds shares. No votes may be cast on shares that are held by us or our direct or indirect subsidiaries or on shares for which we or our subsidiaries hold depository receipts. Nonetheless, the

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holders of a right of usufruct (vruchtgebruik) and the holders of a right of pledge (pandrecht) in respect of shares held by us or our subsidiaries in our share capital are not excluded from the right to vote on such shares, if the right of usufruct (vruchtgebruik) or the right of pledge (pandrecht) was granted prior to the time such shares were acquired by us or any of our subsidiaries. Neither we nor any of our subsidiaries may cast votes in respect of a share on which we or such subsidiary holds a right of usufruct (vruchtgebruik) or a right of pledge (pandrecht).

In accordance with our Articles of Association, for each general meeting, the Board may determine that a record date will be applied in order to establish which shareholders are entitled to attend and vote at the general meeting. Such record date shall be the 28th day prior to the day of the general meeting. The record date and the manner in which shareholders can register and exercise their rights will be set out in the notice of the meeting which must be published in a Dutch daily newspaper with national distribution at least 15 days prior to the meeting (and such notice may therefore be published after the record date for such meeting). Under our Articles of Association, shareholders and others with meeting rights under Dutch law must notify us in writing or by electronic means of their identity and intention to attend the general meeting. This notice must be received by us ultimately on the seventh day prior to the general meeting, unless indicated otherwise when such meeting is convened.

Delaware. Under the Delaware General Corporation Law, each stockholder is entitled to one vote per share of stock, unless the certificate of incorporation provides otherwise. In addition, the certificate of incorporation may provide for cumulative voting at all elections of directors of the corporation, or at elections held under specified circumstances. Either the certificate of incorporation or the bylaws may specify the number of shares and/or the amount of other securities that must be represented at a meeting in order to constitute a quorum, but in no event will a quorum consist of less than one-third of the shares entitled to vote at a meeting.

Stockholders as of the record date for the meeting are entitled to vote at the meeting, and the board of directors may fix a record date that is no more than 60 nor less than 10 days before the date of the meeting, and if no record date is set then the record date is the close of business on the day next preceding the day on which notice is given, or if notice is waived then the record date is the close of business on the day next preceding the day on which the meeting is held. The determination of the stockholders of record entitled to notice or to vote at a meeting of stockholders shall apply to any adjournment of the meeting, but the board of directors may fix a new record date for the adjourned meeting.

Shareholder proposals

The Netherlands. Pursuant to our Articles of Association, extraordinary general meetings will be held whenever required under Dutch law or whenever our Board deems such to be appropriate or necessary. Pursuant to Dutch law, one or more shareholders or others with meeting rights under Dutch law representing at least one-tenth of the issued share capital may request us to convene a general meeting, setting out in detail the matters to be discussed. If our Board has not taken the steps necessary to ensure that such meeting can be held within six weeks after the request, the requesting party or parties may, on their application, be authorized by the competent Dutch court in preliminary relief proceedings to convene a general meeting.

Also, the agenda for a general meeting shall include such items requested by one or more shareholders, and others entitled to attend general meetings, representing at least 3% of the issued share capital, except where the Articles of Association state a lower percentage. Our Articles of Association do not state such lower percentage. Requests must be made in writing or by electronic means and received by the Board at least 60 days before the day of the meeting.

In accordance with the DCGC, and our Articles of Association, shareholders having the right to put item on the agenda under the rules described above, shall exercise such right only after consulting the Board in that respect. If one or more shareholders intend to request that an item be put on the agenda that may result in a change in the Company’s strategy (for example, the removal of directors), the Board must be given the

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opportunity to invoke a reasonable period to respond to such intention. Such period shall not exceed 180 days (or such other period as may be stipulated for such purpose by Dutch law and/or the DCGC from time to time). If invoked, the Board must use such response period for further deliberation and constructive consultation, in any event with the shareholders concerned, and must explore alternatives. At the end of the response time, the Board must report on this consultation and the exploration of alternatives to the general meeting. The response period may be invoked only once for any given general meeting and does not apply: (a) in respect of a matter for which a response period has been previously invoked; or (b) if a shareholder holds at least 75% of the Company’s issued share capital as a consequence of a successful public bid. The response period may also be invoked in response to shareholders or others with meeting rights under Dutch law requesting that a general meeting be convened, as described above.

Delaware. Delaware law does not specifically grant stockholders the right to bring business before an annual or special meeting. Delaware law provides that stockholders have the right to put any proposal before the annual meeting of stockholders, so long as it complies with the notice provisions in the corporation’s governing documents. In addition, if a Delaware corporation is subject to the SEC’s proxy rules, a stockholder who satisfies certain specified criteria with respect to the amount and length of ownership of the corporation’s securities, such stockholder may be eligible to have its proposal included in the corporation’s proxy statement for consideration by all of the corporation’s shareholders.

Action by written consent

The Netherlands. Under Dutch law, shareholders’ resolutions may be adopted in writing without holding a meeting of shareholders, provided that (i) the Articles of Association allow such action by written consent, (ii) the Company has not issued bearer shares or, with its cooperation, depository receipts for shares in its capital, and (iii) the resolution is adopted unanimously by all shareholders that are entitled to vote. Although our Articles of Association allow for shareholders’ resolutions to be adopted in writing, the requirement of unanimity renders the adoption of shareholder resolutions without holding a meeting not feasible for us as a publicly traded Company.

Delaware. Although permitted by Delaware law, publicly listed companies do not typically permit stockholders of a corporation to take action by written consent.

Appraisal rights

The Netherlands. Subject to certain exceptions, Dutch law does not recognize the concept of appraisal or dissenters’ rights. However, Dutch law does provide for squeeze-out procedures as described under “—Dividends and Other Distributions—Squeeze-out procedures.” Also, Dutch law provides for cash exit rights in certain situations for dissenting shareholders of a company organized under Dutch law entering into certain types of mergers. In those situations, a dissenting shareholder may file a claim with the Dutch company for compensation. Such compensation shall then be determined by one or more independent experts. The shares of such shareholder that are subject to such claim will cease to exist as of the moment of entry into effect of the merger.

Delaware. The Delaware General Corporation Law provides for stockholder appraisal rights, or the right to demand payment in cash of the judicially determined fair value of the stockholder’s shares, in connection with certain mergers and consolidations.

Shareholder suits

The Netherlands. In the event a third-party is liable to a Dutch company, only the Company itself can bring a civil action against that party. The individual shareholders do not have the right to bring an action on behalf of the Company. Only in the event that the cause for the liability of a third-party to the Company also constitutes a tortious act directly against a shareholder does that shareholder have an individual right of action against such

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third-party in its own name. Dutch law provides for the possibility to initiate such actions collectively, in which a foundation or an association can act as a class representative and has standing to commence proceedings and claim damages if certain criteria are met. The court will first determine if those criteria are met. If so, the case will go forward as a class action on the merits after a period allowing class members to opt out from the case has lapsed. All members of the class who are residents of the Netherlands and who did not opt-out will be bound to the outcome of the case. Residents of other countries must actively opt in in order to be able to benefit from the class action. The defendant is not required to file defenses on the merits prior to the merits phase having commenced. It is possible for the parties to reach a settlement during the merits phase. Such a settlement can be approved by the court, which approval will then bind the members of the class, subject to a second opt-out. This new regime applies to claims brought after January 1, 2020 and which relate to certain events that occurred prior to that date. For other matters, the old Dutch class actions regime will apply. Under the old regime, no monetary damages can be sought. Also, a judgment rendered under the old regime will not bind individual class members. Even though Dutch law does not provide for derivative suits, directors and officers can still be subject to liability under U.S. securities laws.

Delaware. Under the Delaware General Corporation Law, a stockholder may bring a derivative action on behalf of the corporation to enforce the rights of the corporation. An individual also may commence a class action suit on behalf of himself and other similarly situated stockholders where the requirements for maintaining a class action under Delaware law have been met. A person may institute and maintain such a suit only if that person was a stockholder at the time of the transaction which is the subject of the suit. In addition, under Delaware case law, the plaintiff normally must be a stockholder at the time of the transaction that is the subject of the suit and throughout the duration of the derivative suit. Delaware law also requires that the derivative plaintiff make a demand on the directors of the corporation to assert the corporate claim before the suit may be prosecuted by the derivative plaintiff in court, unless such a demand would be futile.

Repurchase of shares

The Netherlands. Under Dutch law, when issuing shares, a public company with limited liability such as ours may not subscribe for newly issued shares in its own capital. Such company may, however, subject to certain restrictions of Dutch law and its Articles of Association, acquire shares in its own capital. A listed public company with limited liability such as ours may acquire fully paid shares in its own capital at any time for no valuable consideration. Furthermore, subject to certain provisions of Dutch law and its Articles of Association, such company may repurchase fully paid shares in its own capital if (i) the company’s shareholders’ equity less the payment required to make the acquisition does not fall below the sum of paid-up and called-up share capital plus any reserves required by Dutch law or its Articles of Association and (ii) the aggregate nominal value of shares of the company which the company acquires, holds or on which the company holds a right of pledge (pandrecht) or which are held by a subsidiary of the company, would not exceed 50% of its then current issued share capital. Such company may only acquire its own shares if its general meeting has granted the board of directors the authority to effect such acquisitions.

An acquisition of ordinary shares for a consideration must be authorized by our general meeting. Such authorization may be granted for a maximum period of 18 months and must specify the number of ordinary shares that may be acquired, the manner in which ordinary shares may be acquired and the price limits within which ordinary shares may be acquired. The actual acquisition may only be effected pursuant to a resolution of our Board. Prior to the consummation of this offering, our Board will be authorized, for a period of 18 months after our conversion into Pharvaris N.V., to cause the repurchase of ordinary shares by us of up to 10% of our issued share capital, for a price per share not exceeding 110% of the average market price of our ordinary shares on Nasdaq (such average market price being the average of the closing prices on each of the five consecutive trading days preceding the date the acquisition is agreed upon by us). These shares may be used to deliver shares underlying awards granted pursuant to our equity-based compensation plans. No authorization of the general meeting is required if ordinary shares are acquired by us with the intention of transferring such ordinary shares to our employees under an applicable employee stock purchase plan.

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Our Board will also be authorized, for a period of 18 months after our conversion into Pharvaris N.V. to cause the repurchase of preferred shares, for a price which is higher than nil and does not exceed the nominal value thereof.

Delaware. Under the Delaware General Corporation Law, a corporation may generally purchase or redeem its own shares unless the capital of the corporation is impaired or the purchase or redemption would cause an impairment of the capital of the corporation. A Delaware corporation may, however, purchase or redeem out of capital any of its own shares which are entitled upon any distribution of its assets to a preference over another class or series of its stock, or if no shares entitled to such a preference are outstanding, any of its own shares, if such shares will be retired upon acquisition and the capital of the corporation will be reduced in accordance with specified limitations.

Anti-Takeover Provisions

The Netherlands. Under Dutch law, various protective measures are possible and permissible within the boundaries set by Dutch law and Dutch case law. We have adopted several provisions that may have the effect of making a takeover of our Company more difficult or less attractive, including:

| • |  | the authorization of a class of preferred shares that may be issued to a protective foundation pursuant to a call option to that effect, see “Risk Factors—Dutch corporate law and our Articles of Association contain or may contain provisions that may discourage, delay or prevent a takeover attempt, which could adversely affect the price of our ordinary shares”;

| • |  | a provision that our directors may only be removed at the general meeting by a two-thirds majority of votes cast representing more than half of our issued share capital if such removal is not proposed by our Board;

| • |  | our directors being appointed on the basis of a binding nomination by our Board, which can only be overruled by the general meeting by a resolution adopted by at least a two-thirds majority of the votes cast, provided such majority represents more than half of the issued share capital (in which case the Board shall make a new nomination);

| • |  | a provision which allows the former chairman of our Board or our former chief executive officer to be charged with our management if all of our directors are absent or incapacitated; and

| • |  | requirements that certain matters, including an amendment of our Articles of Association, may only be brought to our shareholders for a vote upon a proposal by our Board.

In addition, Dutch law allows for staggered multi-year terms of our directors, as a result of which only part of our directors may be subject to appointment or re-appointment in any one year.

Delaware. In addition to other aspects of Delaware law governing fiduciary duties of directors during a potential takeover, the Delaware General Corporation Law also contains provisions that protect Delaware companies from hostile takeovers and from actions following the takeover by prohibiting some transactions once an acquirer has gained a significant holding in the corporation.

Section 203 of the Delaware General Corporation Law prohibits “business combinations,” including mergers, sales and leases of assets, issuances of securities and similar transactions with an “interested stockholder” (which could include a shareholder that beneficially owns 15% or more of a corporation’s voting stock) for a period of three years following the time that such person becomes an interested stockholder, unless:

| • |  | prior to such time the board of directors of the corporation approved either the business combination or the transaction which resulted in the stockholder becoming an interested stockholder;

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| • |  | after the completion of the transaction in which the person becomes an interested stockholder, the interested stockholder holds at least 85% of the voting stock of the corporation not including shares owned by persons who are directors and officers of interested stockholders and shares owned by specified employee benefit plans; or

| • |  | after the person becomes an interested stockholder, the business combination is approved by the board of directors of the corporation and holders of at least 66.67% of the outstanding voting stock, excluding shares held by the interested stockholder.

A Delaware corporation may elect not to be governed by Section 203 by a provision contained in the original certificate of incorporation of the corporation or an amendment to the original certificate of incorporation or to the bylaws of the Company, which amendment must be approved by a majority of the shares entitled to vote and may not be further amended by the board of directors of the corporation. In most cases, such an amendment is not effective until 12 months following its adoption.

Access to Books and Records

The Netherlands. The board of directors provides the general meeting, within a reasonable amount of time with all information that the shareholders require for the exercise of their powers, unless this would be contrary to an overriding interest of our Company. If the board of directors invokes such an overriding interest, it must give reasons.

Delaware. Under the Delaware General Corporation Law, any stockholder may inspect for any proper purpose certain of the corporation’s books and records during the corporation’s usual hours of business.

Removal of Directors

The Netherlands. Under our Articles of Association, the general meeting shall at all times be entitled to suspend or dismiss a director. The general meeting may only adopt a resolution to suspend or dismiss a director by at least a two-thirds majority of the votes cast, if such majority represents more than half of the issued share capital, unless the proposal was made by the board of directors, in which latter case a simple majority is sufficient.

Delaware. Under the Delaware General Corporation Law, any director or the entire board of directors may be removed, with or without cause, by the holders of a majority of the shares then entitled to vote at an election of directors, except (i) unless the certificate of incorporation provides otherwise, in the case of a corporation whose board is classified, stockholders may effect such removal only for cause, or (ii) in the case of a corporation having cumulative voting, if less than the entire board is to be removed, no director may be removed without cause if the votes cast against such director’s removal would be sufficient to elect such director if then cumulatively voted at an election of the entire board of directors, or, if there are classes of directors, at an election of the class of directors of which he is a part.

Issuance of Shares

The Netherlands. Under Dutch law, a company’s general meeting is the corporate body authorized to resolve on the issuance of shares and the granting of rights to subscribe for shares. The general meeting can delegate such authority to another corporate body of the company, such as the board of directors, for a period not exceeding five years; this authorization may only be extended from time to time for a maximum period of five years.

Prior to the consummation of this offering, our Board will be authorized, for a period of five years after our conversion into Pharvaris N.V., to issue shares or grant rights to subscribe for shares up to our authorized share capital from time to time. We may not subscribe for our own shares on issue.

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Delaware. The issuance of shares requires the board of directors to adopt a resolution or resolutions, authorizing the issuance, pursuant to authority expressly vested in the board of directors by the provisions of the Company’s certificate of incorporation.

Preemptive Rights

The Netherlands. Under Dutch law, in the event of an issuance of ordinary shares, each shareholder will have a pro rata preemptive right in proportion to the aggregate nominal value of the ordinary shares held by such holder (with the exception of ordinary shares to be issued to employees or ordinary shares issued against a contribution other than in cash or pursuant to the exercise of a previously acquired right to subscribe for shares). Under our Articles of Association, the preemptive rights in respect of newly issued ordinary shares may be restricted or excluded by a resolution of the general meeting upon proposal of the board of directors. Our preferred shares carry no preemptive rights.

The board of directors may restrict or exclude the preemptive rights in respect of newly issued ordinary shares if it has been designated as the authorized body to do so by the general meeting. Such designation can be granted for a period not exceeding five years. A resolution of the general meeting to restrict or exclude the preemptive rights or to designate the board of directors as the authorized body to do so requires a majority of not less than two-thirds of the votes cast, if less than one-half of our issued share capital is represented at the meeting.

Prior to the consummation of this offering, our Board will be authorized, for a period of five years after our conversion into Pharvaris N.V. to limit or exclude preemptive rights in relation to an issuance of shares or a grant of rights to subscribe for shares that the Board is authorized to resolve upon. See above under “—Issuance of Shares.”

Delaware. Under the Delaware General Corporation Law, stockholders have no preemptive rights to subscribe for additional issues of stock or to any security convertible into such stock unless, and to the extent that, such rights are expressly provided for in the certificate of incorporation.

Dividends

The Netherlands. Dutch law provides that dividends may be distributed after adoption of the annual accounts by the general meeting from which it appears that such dividend distribution is allowed. Moreover, dividends may be distributed only to the extent the shareholders’ equity exceeds the amount of the paid-up and called-up issued share capital and the reserves that must be maintained under the law or the Articles of Association. Interim dividends may be declared as provided in the Articles of Association and may be distributed to the extent that the shareholders’ equity exceeds the amount of the paid-up and called-up issued share capital plus any reserves as described above as apparent from our financial statements. Under Dutch law, the Articles of Association may prescribe that the board of directors decide what portion of the profits are to be held as reserves.

Under the Articles of Association, first, if any preferred shares are or have been outstanding, a dividend is first paid out of the profit, if available for distribution, to the holders or former holders, as applicable, of those preferred shares to the extent they are entitled to such distribution under our Articles of Association. Any remaining profit is carried to the reserve as the board of directors determines. After reservation by the board of directors of any profit, the remaining profit will be at the disposal of the general meeting at the proposal of our Board for distribution on our ordinary shares, subject to the applicable restrictions of Dutch law. We only make a distribution of dividends to our shareholders after the adoption of our annual accounts demonstrating that such distribution is legally permitted. The board of directors is permitted, subject to certain requirements, to declare interim dividends without the approval of the general meeting.

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Dividends and other distributions shall be made payable not later than the date determined by the board of directors. Claims to dividends and other distributions not made within five years from the date that such dividends or distributions became payable, will lapse and any such amounts will be considered to have been forfeited to us (verjaring).

Delaware. Under the Delaware General Corporation Law, subject to any restrictions contained in the corporation’s certificate of incorporation, a Delaware corporation may pay dividends out of its surplus (the excess of net assets over capital), or in case there is no surplus, out of its net profits for the fiscal year in which the dividend is declared and/or the preceding fiscal year (provided that the amount of the capital of the corporation is not less than the aggregate amount of the capital represented by the issued and outstanding stock of all classes having a preference upon the distribution of assets). Dividends may be paid in the form of shares of the corporation’s capital stock, property or cash.

Shareholder Vote on Certain Reorganizations

The Netherlands. Under Dutch law, the general meeting must approve resolutions of the board of directors relating to a significant change in the identity or the character of the Company or the business of the Company, which includes:

| • |  | a transfer of the business or virtually the entire business to a third-party;

| • |  | the entry into or termination of a long-term cooperation of the Company or a subsidiary with another legal entity or Company or as a fully liable partner in a limited partnership or general partnership, if such cooperation or termination is of a far-reaching significance for the Company; and

| • |  | the acquisition or divestment by the Company or a subsidiary of a participating interest in the capital of a Company having a value of at least one-third of the amount of its assets according to its balance sheet and explanatory notes or, if the Company prepares a consolidated balance sheet, according to its consolidated balance sheet and explanatory notes in the last adopted annual accounts of the Company.

Delaware. Under the Delaware General Corporation Law, the vote of a majority of the outstanding shares of capital stock entitled to vote thereon generally is necessary to approve a merger or consolidation or the sale of all or substantially all of the assets of a corporation. The Delaware General Corporation Law permits a corporation to include in its certificate of incorporation a provision requiring for any corporate action the vote of a larger portion of the stock or of any class or series of stock than would otherwise be required.

Under the Delaware General Corporation Law, no vote of the stockholders of a surviving corporation to a merger is needed, however, unless required by the certificate of incorporation, if (i) the agreement of merger does not amend in any respect the certificate of incorporation of the surviving corporation, (ii) the shares of stock of the surviving corporation are not changed in the merger, and (iii) the number of shares of common stock of the surviving corporation into which any other shares, securities or obligations to be issued in the merger may be converted does not exceed 20% of the surviving corporation’s common stock outstanding immediately prior to the effective date of the merger. In addition, stockholders may not be entitled to vote in certain mergers with other corporations that own 90% or more of the outstanding shares of each class of stock of such corporation, but the stockholders will be entitled to appraisal rights.

Compensation of Directors

The Netherlands. Under Dutch law and our Articles of Association, we must adopt a compensation policy for our Board. Such compensation policy shall be adopted by the general meeting upon the proposal of the board of directors. The board of directors determines the compensation of individual directors with due observance of the compensation policy. Our executive directors may not participate in the discussions or decision-making regarding the compensation of executive directors. A proposal by the board of directors with respect to

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compensation schemes in the form of shares or rights to shares is submitted by the board of directors to the general meeting for its approval. This proposal must set out at least the maximum number of shares or rights to subscribe for shares to be granted to the board of directors and the criteria for granting or amendment.

Delaware. Under the Delaware General Corporation Law, the stockholders do not generally have the right to approve the compensation policy for directors or the senior management of the corporation, although certain aspects of executive compensation may be subject to stockholder vote due to the provisions of U.S. federal securities and tax law, as well as exchange requirements.

Code of Ethics

We have adopted a code of ethics applicable to the board of directors and all employees.

Listing

Our ordinary shares have been approved for listing on the Nasdaq Global Select Market under the symbol “PHVS.”

Transfer Agent and Registrar

The U.S. transfer agent and registrar for the ordinary shares is American Stock Transfer & Trust Company, LLC.

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ORDINARY SHARES ELIGIBLE FOR FUTURE SALE

Prior to this offering, no public market existed for our ordinary shares. Future sales of ordinary shares in the public market after this offering, and the availability of ordinary shares for future sale, could adversely affect the market price of our ordinary shares prevailing from time to time. As described below, a significant number of currently outstanding ordinary shares will not be available for sale shortly after this offering due to contractual restrictions on transfers of ordinary shares. However, future sales of substantial numbers of our ordinary shares, or the perception that these sales could occur, could adversely affect prevailing market prices for our ordinary shares and could impair our future ability to raise equity capital.

Based on the number of ordinary shares outstanding on September 30, 2020, after giving effect to the closing of the Series C financing and upon completion of this offering and the conversion of all of our preferred shares into ordinary shares, 31,839,776 ordinary shares will be outstanding, assuming no exercise of outstanding options or the underwriters’ over-allotment option. All of the ordinary shares sold in this offering will be freely tradable without restrictions or further registration under the Securities Act, except for any ordinary shares sold to our “affiliates,” as that term is defined under Rule 144 under the Securities Act. The remaining ordinary shares held by existing shareholders are “restricted securities,” as that term is defined in Rule 144 under the Securities Act. Restricted securities may be sold in the public market only if registered or if their resale qualifies for exemption from registration described below under Rule 144 or 701 promulgated under the Securities Act.

Additionally, of the options to purchase 1,572,295 ordinary shares outstanding as of January 1, 2021 and assuming no outstanding options or warrants are exercised and no exercise of the underwriters’ overallotment option, 409,795 options exercisable for 409,795 ordinary shares will be vested and eligible for sale 180 days after the date of this prospectus subject to Dutch law.

Under the lock-up agreements described below and the provisions of Rules 144 and 701 under the Securities Act, and assuming no exercise of the underwriters’ overallotment option, these restricted securities will be available for sale in the public market as follows:

| • |  | approximately 8,270,500 ordinary shares will be eligible for immediate sale on the date of this prospectus; and

| • |  | 31,839,776 ordinary shares will be eligible for sale upon the expiration of the lock-up and market standoff agreements 180 days after the date of this prospectus, provided that ordinary shares held by our affiliates will remain subject to volume, manner of sale, and other resale limitations set forth in Rule 144, as described below and subject to Dutch law.

In addition, following the expiration of the lock-up period, certain shareholders will have the right, subject to certain conditions, to require us to register the sale of their ordinary shares under federal securities laws. See “Related Party Transactions—Shareholders Agreement.”

Rule 144

In general, non-affiliate and affiliates, are entitled to sell their securities without registration with the SEC under an exemption from registration provided by Rule 144 under the Securities Act.

Non-Affiliates

Any person who is not deemed to have been one of our affiliates at the time of, or at any time during the three months preceding, a sale may sell an unlimited number of restricted securities under Rule 144 if:

| • |  | the restricted securities have been held for at least six months, including the holding period of any prior owner other than one of our affiliates (subject to certain exceptions);

| • |  | we have been subject to the Exchange Act periodic reporting requirements for at least 90 days before the sale; and

| • |  | during the first year the person has held the shares, we are current in our Exchange Act reporting at the time of sale.

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Any person who is not deemed to have been an affiliate of ours at the time of, or at any time during the three months preceding, a sale and has held the restricted securities for at least one year, including the holding period of any prior owner other than one of our affiliates, will be entitled to sell an unlimited number of restricted securities without regard to the length of time we have been subject to Exchange Act periodic reporting or whether we are current in our Exchange Act reporting. Non-affiliate resales are not subject to the manner of sale, volume limitation or notice filing provisions of Rule 144.

Affiliates

Persons seeking to sell restricted securities who are our affiliates at the time of, or any time during the three months preceding, a sale, would be subject to the restrictions described above. They are also subject to additional restrictions, by which such person would be required to comply with the manner of sale and notice provisions of Rule 144 and would be entitled to sell within any three-month period only that number of securities that does not exceed the greater of either of the following:

| • |  | 1% of the number of ordinary shares then outstanding, which will equal approximately 318,398 shares immediately after the consummation of this offering based on the number of ordinary shares outstanding as of September 30, 2020, after giving effect to the closing of the Series C financing and the conversion of all of our preferred shares into ordinary shares; or

| • |  | the average weekly trading volume of our ordinary shares on the Nasdaq during the four calendar weeks preceding the filing of a notice on Form 144 with respect to the sale.

Additionally, persons who are our affiliates at the time of, or any time during the three months preceding, a sale may sell unrestricted securities under the requirements of Rule 144 described above, without regard to the six month holding period of Rule 144.

Rule 701

Rule 701 under the Securities Act, as in effect on the date of this prospectus, permits resales of ordinary shares in reliance upon Rule 144 but without compliance with certain restrictions of Rule 144, including the holding period requirement. Most of our employees, executive officers or directors who purchased ordinary shares under a written compensatory plan or contract may be entitled to rely on the resale provisions of Rule 701, but all holders of Rule 701 ordinary shares are required to wait until 90 days after the date of this prospectus before selling their ordinary shares subject also to Dutch law. However, all Rule 701 ordinary shares are subject to lockup agreements as described below and in the section of this prospectus titled “Underwriting” and will not become eligible for sale until the expiration of the restrictions set forth in those agreements.

Options to Purchase Ordinary Shares

We intend to file a registration statement on Form S-8 under the U.S. Securities Act to register all ordinary shares issued or issuable pursuant to the exercise of outstanding options and other equity awards to purchase ordinary shares shortly after the date of this prospectus. This registration statement will become effective immediately upon filing. Ordinary shares covered by this registration statement will then be eligible for sale in the public markets, subject to vesting restrictions and any applicable holding periods, any applicable lockup agreements described below and Rule 144 limitations applicable to affiliates.

Regulation S

Regulation S provides generally that sales made in offshore transactions are not subject to the registration or prospectus-delivery requirements of the Securities Act. Accordingly, restricted securities may be sold in offshore transactions in compliance with Regulation S. Offshore transactions are issuances of securities by an issuer, underwriters, affiliates of the issuer and individuals, outside of the United States. As such, the sale of shares by

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us, or our shareholders, outside of the United States could be an “offshore” transaction and not subject to the Securities Act registration requirements, in certain circumstances and subject to specified conditions.

Lock-Up Agreements

We, the members of our Board, our Senior Management and certain of our other existing security holders have agreed, subject to specified exceptions, for a period of 180 days after the date of this prospectus without the prior written consent of Morgan Stanley & Co. LLC, BofA Securities, Inc. and SVB Leerink LLC, not to directly or indirectly:

| • |  | sell, offer, contract or grant any option to sell (including any short sale), pledge, transfer, or establish an open “put equivalent position” within the meaning of Rule 16a-1(h) under the Exchange Act;

| • |  | otherwise dispose of any ordinary shares or securities exchangeable or exercisable for or convertible into ordinary shares currently or hereafter owned either of record or beneficially; or

| • |  | publicly announce an intention to do any of the foregoing.

This restriction terminates after the close of trading of our ordinary shares on and including the 180th day after the date of this prospectus.

Morgan Stanley & Co. LLC, BofA Securities, Inc. and SVB Leerink LLC may, in their sole discretion and at any time or from time to time before the termination of the 180-day period, release all or any portion of the securities subject to lock-up agreements. There are no existing agreements between the underwriters and any of our shareholders who will execute a lock-up agreement, providing consent to the sale of ordinary shares prior to the expiration of the lock-up period.

Directed Share Program

At our request, the underwriters have reserved up to 5% of the ordinary shares offered by this prospectus, for sale at the initial public offering price through a directed share program to certain individuals, including our directors, officers, employees, and certain friends and family members of these persons. Shares purchased through the directed share program will not be subject to lockup restrictions with the underwriters, except in the case of shares purchased by any of our directors, officers or employees. For additional information, see the section titled “Underwriting—Directed Share Program.”

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MATERIAL UNITED STATES AND DUTCH INCOME TAX CONSIDERATIONS

The information presented under the caption “—Material U.S. Federal Income Tax Considerations to U.S. Holders” below is a discussion of material U.S. federal income tax considerations to a U.S. Holder (as defined below) of investing in our ordinary shares. The information presented under the caption “—Dutch Tax Consequences” is a discussion of the material Dutch tax consequences of investing in our ordinary shares.

You should consult your tax advisor regarding the applicable tax consequences to you of investing in our ordinary shares under the laws of the United States (federal, state and local), the Netherlands, and any other applicable jurisdiction.

Material U.S. Federal Income Tax Considerations to U.S. Holders

The following is a discussion of the material U.S. federal income tax consequences to the U.S. Holders, as defined below, of owning and disposing of our ordinary shares. It does not describe all tax considerations that may be relevant to a particular person’s decision to acquire our ordinary shares. This discussion applies only to a U.S. Holder that purchases our ordinary shares in connection with this offering and holds such ordinary shares as capital assets for U.S. federal income tax purposes, and this discussion applies only to such ordinary shares. This discussion is general in nature and it does not describe all of the U.S. federal income tax consequences that may be relevant in light of the U.S. Holder’s particular circumstances, including the potential application of the Medicare contribution tax, estate or gift tax consequences, any tax consequences other than U.S. federal income tax consequences, and tax consequences applicable to U.S. Holders subject to special rules, such as:

| • |  | certain financial institutions;

| • |  | corporations that accumulate earnings to avoid U.S. federal income tax, or expatriated entities subject to Section 7874 of the Code;

| • |  | dealers or traders in securities who use a mark-to-market method of tax accounting;

| • |  | persons holding ordinary shares as part of a hedging transaction, straddle, wash sale, conversion transaction or other integrated transaction or persons entering into a constructive sale with respect to ordinary shares;

| • |  | persons whose functional currency for U.S. federal income tax purposes is not the U.S. dollar;

| • |  | entities classified as partnerships for U.S. federal income tax purposes or other pass-through entities or investors in such entities;

| • |  | tax-exempt entities, including an “individual retirement account” or “Roth IRA”;

| • |  | any persons directly or indirectly acquiring ordinary shares in connection with the performance of services;

| • |  | persons who are subject to Section 451(b) of the Code;

| • |  | persons that own or are deemed to own ten percent or more of our ordinary shares (by vote or value);

| • |  | S corporations, regulated investment companies, real estate investment trusts, real estate mortgage investment conduits; or

| • |  | persons holding ordinary shares in connection with a trade or business conducted outside of the United States.

If an entity that is classified as a partnership for U.S. federal income tax purposes holds ordinary shares, the U.S. federal income tax treatment of a partner will generally depend on the status of the partner and the activities

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of the partner and the partnership. Partnerships holding ordinary shares and partners in such partnerships should consult their tax advisers as to the particular U.S. federal income tax consequences of owning and disposing of ordinary shares.

This discussion is based on the Code, administrative pronouncements, judicial decisions, final, temporary and proposed Treasury regulations, and the income tax treaty between the Netherlands and the United States, or the Treaty, all as of the date hereof, any of which is subject to change or differing interpretations, possibly with retroactive effect, so as to result in U.S. federal income tax consequences different from those discussed below. We have not sought, and do not expect to seek, any ruling from the U.S. Internal Revenue Service, or the Service, with respect to the statements made and the conclusions reached in the following summary, and there can be no assurance that the Service or a court would agree with our statements and conclusions or that a court would not sustain any challenge by the Service in the event of litigation.

A “U.S. Holder” is a holder who, for U.S. federal income tax purposes, is a beneficial owner of ordinary shares, who is eligible for the benefits of the Treaty and who is:

| • |  | a citizen or individual resident of the United States;

| • |  | a corporation, or other entity taxable as a corporation, created or organized in or under the laws of the United States, any state therein or the District of Columbia;

| • |  | an estate, the income of which is subject to U.S. federal income taxation regardless of its source; or

| • |  | a trust if either (1) a court within the U.S. is able to exercise primary jurisdiction over the administration of the trust and one or more U.S. persons have the authority to control all substantial decisions of the trust, or (2) the trust has a valid election in effect under applicable Treasury Regulations to be treated as a U.S. person.

THIS SUMMARY IS FOR GENERAL INFORMATION PURPOSES ONLY, AND IS NOT INTENDED TO BE, AND SHOULD NOT BE CONSTRUED TO BE, LEGAL OR TAX ADVICE TO ANY PARTICULAR HOLDER. PROSPECTIVE INVESTORS ARE URGED TO CONSULT THEIR TAX ADVISORS WITH REGARD TO THE APPLICATION OF THE U.S. FEDERAL INCOME TAX LAWS, AS WELL AS THE APPLICATION OF U.S. NON-INCOME TAX LAWS AND THE LAWS OF ANY STATE, LOCAL OR NON-U.S. JURISDICTION, IN LIGHT OF THEIR PARTICULAR SITUATION.

Taxation of Distributions

As discussed above under “Dividend Policy,” we do not expect to make distributions on our ordinary shares in the near future. In the event that we do make distributions of cash or other property, subject to the PFIC rules described below, distributions paid on our ordinary shares will generally be treated as dividends to the extent paid out of our current or accumulated earnings and profits (as determined under U.S. federal income tax principles). Because we do not maintain calculations of our earnings and profits under U.S. federal income tax principles, we expect that distributions generally will be reported to U.S. Holders as dividends. If and for so long as our ordinary shares are listed on the Nasdaq or another established securities market in the United States or if and for so long as we are eligible for benefits under the Treaty, dividends paid to certain non-corporate U.S. Holders may be eligible for taxation as “qualified dividend income” if we are not treated as a PFIC with respect to the U.S. Holder and were not treated as a PFIC with respect to the U.S. Holder in the preceding taxable year, and if certain other requirements are met. Therefore, subject to applicable limitations, dividends paid to certain non-corporate U.S. Holders may be taxable at rates not in excess of the long-term capital gain rate applicable to such U.S. Holders. U.S. Holders should consult their tax advisers regarding the availability of the reduced tax rate on dividends in their particular circumstances. The amount of a dividend will include any amounts withheld by us in respect of Dutch income taxes. Subject to the PFIC rules described below, the amount of the dividend will be treated as foreign-source dividend income to U.S. Holders and will not be eligible for the dividends-received deduction generally available to U.S. corporations under the United States Internal Revenue Code.

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Subject to the PFIC rules described below, dividends will be included in a U.S. Holder’s income on the date of the U.S. Holder’s receipt of the dividend. The amount of any dividend income paid in euros will be the U.S. dollar amount calculated by reference to the exchange rate in effect on the date of actual or constructive receipt, regardless of whether the payment is in fact converted into U.S. dollars at that time. If the dividend is converted into U.S. dollars on the date of receipt, a U.S. Holder should not be required to recognize foreign currency gain or loss in respect of the dividend income. A U.S. Holder may have foreign currency gain or loss if the dividend is converted into U.S. dollars after the date of receipt.

Subject to applicable limitations, some of which vary depending upon the U.S. Holder’s particular circumstances, Dutch income taxes withheld from dividends on our ordinary shares at a rate not exceeding the rate provided by the Treaty will be creditable against the U.S. Holder’s U.S. federal income tax liability. Dutch taxes withheld in excess of the rate applicable under the Treaty will not be eligible for credit against a U.S. Holder’s U.S. federal income tax liability. The rules governing foreign tax credits are complex, and U.S. Holders should consult their tax advisers regarding the creditability of foreign taxes in their particular circumstances. In lieu of claiming a foreign tax credit, U.S. Holders may, at their election, deduct foreign taxes, including any Dutch income tax, in computing their taxable income, subject to generally applicable limitations under U.S. law. An election to deduct foreign taxes instead of claiming foreign tax credits applies to all foreign taxes paid or accrued in the taxable year.

Sale or Other Disposition of Ordinary Shares

Subject to the PFIC rules described below, gain or loss realized on the sale or other disposition of ordinary shares will be capital gain or loss, and will be long-term capital gain or loss if the U.S. Holder held the ordinary shares for more than one year. The amount of the gain or loss will equal the difference between the U.S. Holder’s tax basis in the ordinary shares disposed of and the amount realized on the disposition, in each case as determined in U.S. dollars. This gain or loss will generally be U.S.-source gain or loss for foreign tax credit purposes. The deductibility of capital losses is subject to various limitations.

Passive Foreign Investment Company Rules

Under the Code, we will be a PFIC for any taxable year in which, after the application of certain “look-through” rules with respect to subsidiaries, either (i) 75% or more of our gross income consists of “passive income,” or (ii) 50% or more of the average quarterly value of our assets consist of assets that produce, or are held for the production of, “passive income.” For purposes of the above calculations, we will be treated as if we hold our proportionate share of the assets of, and receive directly our proportionate share of the income of, any other corporation in which we directly or indirectly own at least 25%, by value, of the shares of such corporation. Passive income generally includes dividends, interest, rents, certain non-active royalties and capital gains. Based on the nature of our business, our financial statements, our expectations about the nature and amount of our income, assets and activities and the expected price of our ordinary shares in this offering, we do not believe we were a PFIC in 2019 and we do not expect to be a PFIC for our current taxable year or in the foreseeable future. In addition, we may, directly or indirectly, hold equity interests in other PFICs, or Lower-tier PFICs. Whether we or any of our subsidiaries will be a PFIC in 2020 or any future year is a factual determination that must be made annually at the close of each taxable year, and, thus, is subject to significant uncertainty, because among other things (i) a determination of whether a company is a PFIC must be made annually after the end of each taxable year and will depend on the composition of our income and assets and the market value of our assets from time to time and (ii) we will hold a substantial amount of cash following this offering, we cannot assure you that we will not be a PFIC for the current or any future taxable year. Accordingly, there can be no assurance that we will not be a PFIC in 2020 or any future taxable year and our United States tax counsel expresses no opinion regarding our PFIC status for any prior, current or future taxable year. If we are a PFIC for any year during which a U.S. Holder holds or is deemed to hold ordinary shares, we generally would continue to be treated as a PFIC with respect to that U.S. Holder for all succeeding years during which the U.S. Holder holds or is deemed to hold

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ordinary shares, even if we ceased to meet the threshold requirements for PFIC status, unless under certain circumstances the U.S. Holder makes a valid deemed sale or deemed dividend election under the applicable Treasury regulations with respect to its ordinary shares.

Under certain attribution rules, assuming we are a PFIC, U.S. Holders will be deemed to own their proportionate shares of any Lower-tier PFICs and will be subject to U.S. federal income tax according to the rules described in the following paragraphs on (i) certain distributions by a Lower-tier PFIC and (ii) a disposition of shares of a Lower-tier PFIC, in each case as if the U.S. Holder held such shares directly, even if the U.S. Holder has not received the proceeds of those distributions or dispositions.

Generally, if we were a PFIC for any taxable year during which a U.S. Holder held or is deemed to have held ordinary shares, gain recognized by a U.S. Holder on a sale or other disposition (including certain pledges) of such ordinary shares, or an indirect disposition of shares of a Lower-tier PFIC, would be allocated ratably over the U.S. Holder’s holding period for such ordinary shares. The amounts allocated to the taxable year of the sale or other disposition and to any year before we became a PFIC would be taxed as ordinary income. The amount allocated to each other taxable year would be subject to tax at the highest rate in effect for individuals or corporations, as appropriate, for that taxable year, and an interest charge would be imposed on the amount allocated to that taxable year. Further, to the extent that any distribution received by a U.S. Holder with respect to its ordinary shares (or a distribution by a Lower-tier PFIC to its shareholder that is deemed to be received by a U.S. Holder) exceeds 125% of the average of the annual distributions on the ordinary shares received during the preceding three years or the U.S. Holder’s holding period, whichever is shorter, that distribution would be subject to taxation in the same manner as gain, described immediately above.

A U.S. Holder can avoid certain of the adverse rules described above by making a mark-to-market election with respect to its ordinary shares, provided that the ordinary shares are “marketable.” Ordinary shares will be marketable if they are “regularly traded” on a “qualified exchange” or other market within the meaning of applicable Treasury regulations. If a U.S. Holder makes the mark-to-market election, it generally will recognize as ordinary income any excess of the fair market value of the ordinary shares at the end of each taxable year over their adjusted tax basis, and will recognize an ordinary loss in respect of any excess of the adjusted tax basis of the ordinary shares over their fair market value at the end of the taxable year (but only to the extent of the net amount of income previously included as a result of the mark-to-market election). If a U.S. Holder makes the election, the U.S. Holder’s tax basis in the ordinary shares will be adjusted to reflect the income or loss amounts recognized. Any gain recognized on the sale or other disposition of ordinary shares, as applicable, in a year when we are a PFIC will be treated as ordinary income and any loss will be treated as an ordinary loss (but only to the extent of the net amount of income previously included as a result of the mark-to-market election). A mark-to-market election generally cannot be made for equity interests in any Lower-tier PFIC unless shares of such Lower-tier PFIC are themselves “marketable.” As a result, if a U.S. Holder makes a mark-to-market election with respect to our ordinary shares, the U.S. Holder would nevertheless be subject to the PFIC rules described above with respect to its indirect interest in any Lower-tier PFIC unless the U.S. Holder makes a QEF Election with respect to such Lower-tier PFIC, as discussed below. U.S. Holders should consult their tax advisers regarding the availability and advisability of making a mark-to-market election in their particular circumstances.

In addition, in order to avoid the application of the foregoing rules, a United States person that owns stock in a PFIC for U.S. federal income tax purposes may make a QEF Election with respect to such PFIC, and each PFIC in which the PFIC holds equity interests, if the PFIC provides the information necessary for such election to be made. In order to make such an election, a United States person would be required to make the QEF Election for each PFIC by attaching a separate properly completed IRS Form 8621 for each PFIC to the United States person’s timely filed U.S. federal income tax return generally for the first taxable year that the entity is treated as a PFIC with respect to the United States person. A U.S. Holder generally may make a separate election to defer payment of taxes on the undistributed income inclusion under the QEF rules, but if deferred, any such taxes are subject to an interest charge. If a United States person makes a QEF Election with respect to a PFIC, the United States person will be currently taxable on its pro rata share of the PFIC’s ordinary earnings and net capital gain

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(at ordinary income and capital gain rates, respectively) for each taxable year that the entity is classified as a PFIC and will not be required to include such amounts in income when actually distributed by the PFIC. There is no assurance that we will provide information necessary for U.S. Holders to make QEF Elections. If a U.S. Holder makes a QEF Election with respect to us, any distributions paid by us out of our earnings and profits that were previously included in the U.S. Holder’s income under the QEF Election will not be taxable to the U.S. Holder. A U.S. Holder will increase its tax basis in its ordinary shares by an amount equal to any income included under the QEF Election and will decrease its tax basis by any amount distributed, if any, on the ordinary shares that is not included in its income. In addition, a U.S. Holder will recognize capital gain or loss on the disposition of ordinary shares in an amount equal to the difference between the amount realized and its adjusted tax basis in our ordinary shares. U.S. Holders should note that if they make QEF Elections with respect to us and Lower-tier PFICs, if any, they may be required to pay U.S. federal income tax with respect to their ordinary shares for any taxable year significantly in excess of any cash distributions, if any, received on the ordinary shares, as applicable, for such taxable year. If we determine that any of our subsidiaries is a Lower-tier PFIC for any taxable year, there is no assurance that we will provide information necessary for U.S. Holders to make a QEF Election with respect to such Lower-tier PFIC. U.S. Holders should consult their tax advisers regarding making QEF Elections in their particular circumstances.

In addition, if we were a PFIC or, with respect to a particular U.S. Holder, were treated as a PFIC for the taxable year in which we paid a dividend or for the prior taxable year, the preferential dividend rates discussed above with respect to dividends paid to certain non-corporate U.S. Holders would not apply.

If a U.S. Holder owns ordinary shares during any year in which we are a PFIC, the U.S. Holder generally must file annual reports, containing such information as the U.S. Treasury may require on IRS Form 8621 (or any successor form) with respect to us, generally with the U.S. Holder’s federal income tax return for that year, unless otherwise specified in the instructions with respect to such form.

U.S. Holders should consult their tax advisors concerning our potential PFIC status and the potential application of the PFIC rules. The U.S. federal income tax rules relating to PFICs are very complex. U.S. Holders are strongly urged to consult their tax advisors with respect to the impact of PFIC status on the purchase, ownership and disposition of our ordinary shares, as applicable, the consequences to them of an investment in a PFIC (and any Lower-tier PFICs), any elections available with respect to the ordinary shares and the IRS information reporting obligations with respect to the purchase, ownership and disposition of ordinary shares of a PFIC.

Information Reporting and Backup Withholding

Payments of dividends and sales proceeds that are made within the United States or through certain U.S.-related financial intermediaries generally are subject to information reporting, and may be subject to backup withholding, unless (i) the U.S. Holder is a corporation or other exempt recipient or (ii) in the case of backup withholding, the U.S. Holder provides a correct taxpayer identification number and certifies that it is not subject to backup withholding.

The amount of any backup withholding from a payment to a U.S. Holder will be allowed as a credit against the U.S. Holder’s U.S. federal income tax liability and may entitle it to a refund, provided that the required information is timely furnished to the IRS.

Information Reporting With Respect to Foreign Financial Assets

Certain U.S. Holders who are individuals and certain entities may be required to report information relating to an interest in our ordinary shares, subject to certain exceptions (including an exception for ordinary shares held in accounts maintained by certain U.S. financial institutions). U.S. Holders should consult their tax advisers regarding whether or not they are obligated to report information relating to their ownership and disposition of ordinary shares.

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Dutch Tax Consequences

Scope of Discussion

To the extent this section consists of a statement as to matters of Dutch tax law, this section is the opinion of our Dutch counsel, NautaDutilh N.V., and outlines certain material Dutch tax consequences of the acquisition, holding and disposal of our ordinary shares. It does not purport to describe all possible tax considerations or consequences that may be relevant to a holder or prospective holder of our ordinary shares and does not purport to deal with the tax consequences applicable to all categories of investors, some of which (such as trusts or similar arrangements) may be subject to special rules. In view of its general nature, this section should be treated with corresponding caution.

This section is based on the tax laws of the Netherlands, published regulations thereunder and published authoritative case law, all as in effect on the date hereof, and all of which are subject to change, possibly with retroactive effect. Where this section refers to “the Netherlands” or “Dutch” it refers only to the part of the Kingdom of the Netherlands located in Europe.

THIS DISCUSSION IS FOR GENERAL INFORMATION PURPOSES ONLY AND IS NOT DUTCH TAX ADVICE OR A COMPLETE DESCRIPTION OF ALL DUTCH TAX CONSEQUENCES RELATING TO THE ACQUISITION, HOLDING AND DISPOSAL OF THE SHARES. HOLDERS OR PROSPECTIVE HOLDERS OF ORDINARY SHARES SHOULD CONSULT THEIR OWN TAX ADVISORS REGARDING THE DUTCH TAX CONSEQUENCES RELATING TO THE ACQUISITION, HOLDING AND DISPOSAL OF THE ORDINARY SHARES IN LIGHT OF THEIR PARTICULAR CIRCUMSTANCES.

Please note that this section does not describe the Dutch tax consequences for:

| i. |  | holders of our ordinary shares if such holders, and in the case of individuals, such holder’s partner or certain of its relatives by blood or marriage in the direct line (including foster children), have a substantial interest (aanmerkelijk belang) or deemed substantial interest (fictief aanmerkelijk belang) in us under the Dutch Income Tax Act 2001 (Wet inkomstenbelasting 2001). Generally speaking, a holder of securities in a company is considered to hold a substantial interest in such company, if such holder alone or, in the case of individuals, together with such holder’s partner (as defined in the Dutch Income Tax Act 2001), directly or indirectly, holds (i) an interest of 5% or more of the total issued and outstanding capital of that company or of 5% or more of the issued and outstanding capital of a certain class of shares of that company; or (ii) rights to acquire, directly or indirectly, such interest; or (iii) certain profit sharing rights in that company that relate to 5% or more of the company’s annual profits or to 5% or more of the company’s liquidation proceeds. A deemed substantial interest may arise if a substantial interest (or part thereof) in a company has been disposed of, or is deemed to have been disposed of, on a non-recognition basis;

| ii. |  | holders of our ordinary shares, if the ordinary shares held by such holders qualify or qualified as a participation (deelneming) for purposes of the Dutch Corporate Income Tax Act 1969 (Wet op de vennootschapsbelasting 1969). Generally, a holder’s shareholding of 5% or more in a company’s nominal paid-up share capital qualifies as a participation. A holder may also have a participation if such holder does not have a shareholding of 5% or more but a related entity (statutorily defined term) has a participation or if the company in which the shares are held is a related entity (statutorily defined term);

| iii. |  | pension funds, investment institutions (fiscale beleggingsinstellingen), exempt investment institutions (vrijgestelde beleggingsinstellingen) (as defined in the Dutch Corporate Income Tax Act 1969) and other entities that are, in whole or in part, not subject to or exempt from Dutch corporate income tax as well as entities that are exempt from corporate income tax in their country of residence, such country of residence being another state of the European Union, Norway, Liechtenstein, Iceland or any other state with which the Netherlands has agreed to exchange information in line with international standards;

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| iv. |  | holders who may be deemed an owner of ordinary shares for Dutch tax purposes pursuant to specific statutory attribution rules in Dutch tax law;

| v. |  | holders who are for Dutch tax purposes taxable as a corporate entity and resident of Aruba, Curaçao or Sint Maarten; and

| vi. |  | holders of our ordinary shares who are individuals for whom the ordinary shares or any benefit derived from the ordinary shares are a remuneration or deemed to be a remuneration for activities performed by such holders or certain individuals related to such holders (as defined in the Dutch Income Tax Act 2001).

Dividend Withholding Tax

General

Dividends distributed by us generally are subject to Dutch dividend withholding tax at a rate of 15%. Generally, we are responsible for the withholding of such dividend withholding tax at source; the Dutch dividend withholding tax is for the account of the holder of our ordinary shares.

The expression “dividends distributed” includes, among other things:

| • |  | distributions in cash or in kind, deemed and constructive distributions and repayments of paid-in capital not recognized for Dutch dividend withholding tax purposes;

| • |  | liquidation proceeds, proceeds of redemption of our ordinary shares, or proceeds of the repurchase of ordinary shares by us or one of our subsidiaries or other affiliated entities to the extent such proceeds exceed the average paid-in capital of those ordinary shares as recognized for purposes of Dutch dividend withholding tax;

| • |  | an amount equal to the par value of our ordinary shares issued or an increase of the par value of ordinary shares, to the extent that it does not appear that a contribution, recognized for purposes of Dutch dividend withholding tax, has been made or will be made; and

| • |  | partial repayment of the paid-in capital, recognized for purposes of Dutch dividend withholding tax, if and to the extent that we have net profits (zuivere winst), unless (i) the general meeting has resolved in advance to make such repayment and (ii) the par value of the ordinary shares concerned has been reduced by an equal amount by way of an amendment of the Articles of Association.

Individuals and corporate legal entities who are resident or deemed to be resident of the Netherlands for Dutch tax purposes (“Dutch Resident Individuals” and “Dutch Resident Entities,” as the case may be), generally are entitled to an exemption of or a credit for any Dutch dividend withholding tax against their income tax or corporate income tax liability and to a refund of any residual Dutch dividend withholding tax. The same generally applies to holders of ordinary shares that are neither resident nor deemed to be resident of the Netherlands if the ordinary shares are attributable to a Dutch permanent establishment of such non-resident holder.

A holder of our ordinary shares resident of a country other than the Netherlands may, depending on such holder’s specific circumstances, be entitled to exemptions from, reductions of, or full or partial refunds of, Dutch dividend withholding tax under Dutch national tax legislation or a double taxation convention in effect between the Netherlands and such other country.

Remittance to the Dutch tax authorities

In general, we will be required to remit all amounts withheld as Dutch dividend withholding tax to the Dutch tax authorities. However, under certain circumstances, we are allowed to reduce the amount to be remitted to the Dutch tax authorities by the lesser of:

| • |  | 3% of the portion of the distribution paid by us that is subject to Dutch dividend withholding tax; and

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| • |  | 3% of the dividends and profit distributions, before deduction of foreign withholding taxes, received by us from qualifying foreign subsidiaries in the current calendar year (up to the date of the distribution) and the two preceding calendar years, as far as such dividends and profit distributions have not yet been taken into account for purposes of establishing the above mentioned reduction.

Although this reduces the amount of Dutch dividend withholding tax that we are required to remit to the Dutch tax authorities, it does not reduce the amount of tax that we are required to withhold on dividends distributed.

Dividend stripping

Pursuant to legislation to counteract “dividend stripping”, a reduction, exemption, credit or refund of Dutch dividend withholding tax is denied if the recipient of the dividend is not the beneficial owner as described in the Dutch Dividend Withholding Tax Act 1965 (Wet op de dividendbelasting 1965). This legislation generally targets situations in which a shareholder retains its economic interest in shares but reduces the withholding tax costs on dividends by a transaction with another party. It is not required for these rules to apply that the recipient of the dividends is aware that a dividend stripping transaction took place. The Dutch State Secretary of Finance takes the position that the definition of beneficial ownership introduced by this legislation will also be applied in the context of a double taxation convention.

Taxes on Income and Capital Gains

Holders of Ordinary Shares Resident in the Netherlands: Individuals

If the holder of our ordinary shares is an individual resident or deemed to be resident of the Netherlands for Dutch income tax purposes (a “Dutch Resident Individual”), any payment on the ordinary shares or any gain or loss realized on the disposal or deemed disposal of the ordinary shares is taxable at the progressive Dutch income tax rates (with a maximum of 49.50% in 2021), if:

| i. |  | the ordinary shares are attributable to an enterprise from which the holder of ordinary shares derives a share of the profit, whether as an entrepreneur (ondernemer) or as a person who has a co-entitlement to the net worth (medegerechtigd tot het vermogen) of such enterprise without being a shareholder (as defined in the Dutch Income Tax Act 2001); or

| ii. |  | the holder of ordinary shares is considered to perform activities with respect to the ordinary shares that go beyond ordinary asset management (normaal, actief vermogensbeheer) or derives benefits from the Shares that are taxable as benefits from other activities (resultaat uit overige werkzaamheden).

If the above-mentioned conditions (i) and (ii) do not apply to the individual holder of our ordinary shares, such holder will be taxed annually on a deemed return (with a maximum of 5.69% in 2021) on the individual’s net investment assets (rendementsgrondslag) for the year, insofar the individual’s net investment assets for the year exceed a statutory threshold (heffingvrij vermogen). The deemed return on the individual’s net investment assets for the year is taxed at a rate of 31%. Actual income, gains or losses in respect of the ordinary shares are as such not subject to Dutch income tax.

The net investment assets for the year are the fair market value of the investment assets less the allowable liabilities on 1 January of the relevant calendar year. Our ordinary shares are included as investment assets. For the net investment assets on 1 January 2021, the deemed return ranges from 1.90% up to 5.69% (depending on the aggregate amount of the net investment assets of the individual on 1 January 2021). The deemed return will be adjusted annually on the basis of historic market yields.

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Holders of Ordinary Shares Resident in the Netherlands: Corporate Entities

Generally speaking, if the holder of ordinary shares is an entity that is a resident or deemed to be resident of the Netherlands for Dutch corporate income tax purposes (a “Dutch Resident Entity”), any payment under the ordinary shares or any gain or loss realized on the disposal or deemed disposal of the ordinary shares is subject to Dutch corporate income tax at a rate of 15% with respect to taxable profits up to €245,000 and 25% with respect to taxable profits in excess of that amount (rates and brackets for 2021).

Holders of Ordinary Shares Resident Outside the Netherlands

A holder of our ordinary shares that is neither a Dutch Resident Entity nor a Dutch Resident Individual will not be subject to Dutch taxes on income or capital gains in respect of any payment under our ordinary shares or in respect of any gain or loss realized on the disposal or deemed disposal of the ordinary shares, provided that:

| i. |  | such holder does not have interest in an enterprise or deemed enterprise (as defined in the Dutch Income Tax Act 2001 and the Dutch Corporate Income Tax Act 1969) which, in whole or in part, is either effectively managed in the Netherlands or carried on through a permanent establishment, a deemed permanent establishment or a permanent representative in the Netherlands and to which enterprise or part of an enterprise the ordinary shares are attributable; and

| ii. |  | in the event the holder is an individual, such holder does not carry out any activities in the Netherlands with respect to the ordinary shares that go beyond ordinary asset management and does not derive benefits from the ordinary shares that are taxable as benefits from other activities in the Netherlands.

Gift and Inheritance Taxes

Holders of Ordinary Shares Resident in the Netherlands

Gift or inheritance taxes will arise in the Netherlands with respect to a transfer of ordinary shares by way of a gift by, or on the death of, a holder of such ordinary shares who is resident or deemed resident of the Netherlands at the time of the gift or the holder’s death.

Holders of Ordinary Shares Resident Outside the Netherlands

No gift or inheritance taxes will arise in the Netherlands with respect to a transfer of our ordinary shares by way of gift by, or on the death of, a holder of ordinary shares who is neither resident nor deemed to be resident of the Netherlands, unless:

| i. |  | in the case of a gift of our ordinary shares by an individual who at the date of the gift was neither resident nor deemed to be resident of the Netherlands, such individual dies within 180 days after the date of the gift, while being resident or deemed to be resident of the Netherlands; or

| ii. |  | the transfer is otherwise construed as a gift or inheritance made by, or on behalf of, a person who, at the time of the gift or death, is or is deemed to be resident of the Netherlands.

For purposes of Dutch gift and inheritance taxes, amongst others, a person that holds the Dutch nationality will be deemed to be resident of the Netherlands if such person has been resident in the Netherlands at any time during the ten years preceding the date of the gift or such person’s death. Additionally, for purposes of Dutch gift tax, amongst others, a person not holding the Dutch nationality will be deemed to be resident of the Netherlands if such person has been resident in the Netherlands at any time during the twelve months preceding the date of the gift.

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Value Added Tax

No Dutch value added tax will arise in respect of any payment in consideration for the holding or disposal of our ordinary shares.

Other Taxes and Duties

No Dutch registration tax, transfer tax, stamp duty or any other similar documentary tax or duty will be payable in the Netherlands in respect of any payment in consideration for the holding or disposal of our ordinary shares.

Residency

A holder of our ordinary shares will not be treated as a resident, or a deemed resident, of the Netherlands by reason only of the acquisition, or the holding, of our ordinary shares or the performance by us under our ordinary shares.

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ENFORCEABILITY OF JUDGMENTS

The ability of shareholders in certain countries other than the Netherlands, in particular in the United States, to bring an action against us may be limited under Dutch law. We are incorporated under the laws of the Netherlands and have our statutory seat (statutaire zetel) in Leiden, the Netherlands.

The majority of the members of the Board are resident of countries other than the United States. All or a substantial proportion of the assets of these individuals are located outside the United States. Our assets are predominantly located outside the United States. As a result, it may not be possible for investors to effect service of process within the United States upon such persons, or to enforce against them or us in U.S. courts, including judgments predicated upon the civil liability provisions of the federal securities laws of the United States.

There is currently no treaty between the United States and the Netherlands for the mutual recognition and enforcement of judgments (other than arbitration awards) in civil and commercial matters. Therefore, a final judgment for the payment of money rendered by any federal or state court in the United States based on civil liability, whether or not predicated solely upon the U.S. federal securities laws, would not be enforceable in the Netherlands unless the underlying claim is relitigated before a Dutch court of competent jurisdiction. Under current practice, however, a Dutch court will generally, subject to compliance with certain procedural requirements, grant the same judgment without a review of the merits of the underlying claim if such judgment (i) is a final judgment and has been rendered by a court, which has established its jurisdiction vis-à-vis the relevant Dutch companies or Dutch company, as the case may be, on the basis of internationally accepted grounds of jurisdiction, (ii) has not been rendered in violation of principles of proper procedure (behoorlijke rechtspleging), (iii) is not contrary to the public policy of the Netherlands, and (iv) is not incompatible with (a) a prior judgment of a Dutch court rendered in a dispute between the same parties or (b) a prior judgment of a foreign court rendered in a dispute between the same parties, concerning the same subject matter and based on the same cause of action, provided that such prior judgment is capable of being recognized in the Netherlands and except to the extent that the foreign judgment contravenes Dutch public policy (openbare orde). Dutch courts may deny the recognition and enforcement of punitive damages or other awards. Moreover, a Dutch court may reduce the amount of damages granted by a U.S. court and recognize damages only to the extent that they are necessary to compensate actual losses or damages. Enforcement and recognition of judgments of U.S. courts in the Netherlands are solely governed by the provisions of the Dutch Code of Civil Procedure (Wetboek van Burgerlijke Rechtsvordering). Based on the foregoing, there can be no assurance that U.S. investors will be able to enforce any judgments obtained in U.S. courts in civil and commercial matters, including judgments under the U.S. federal securities laws.

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UNDERWRITING

Under the terms and subject to the conditions in an underwriting agreement dated the date of this prospectus, the underwriters named below, for whom Morgan Stanley & Co. LLC, BofA Securities, Inc. and SVB Leerink LLC are acting as representatives, have severally agreed to purchase, and we have agreed to sell to them, severally, the number of shares indicated below:

Name |  | Number of Shares |
Morgan Stanley & Co. LLC |  |  | 3,101,438 |
BofA Securities, Inc. |  |  | 2,481,150 |
SVB Leerink LLC |  |  | 1,943,567 |
Oppenheimer & Co. Inc. |  |  | 413,525 |
Kempen & Co U.S.A., Inc. |  |  | 330,820 |
Total: |  |  | 8,270,500 |

The underwriters and the representatives are collectively referred to as the “underwriters” and the “representatives,” respectively. The underwriters are offering the ordinary shares subject to their acceptance of the shares from us and subject to prior sale. The underwriting agreement provides that the obligations of the several underwriters to pay for and accept delivery of the ordinary shares offered by this prospectus are subject to the approval of certain legal matters by their counsel and to certain other conditions. The underwriters are obligated to take and pay for all of the ordinary shares offered by this prospectus if any such shares are taken. However, the underwriters are not required to take or pay for the shares covered by the underwriters’ over-allotment option described below.

Certain of the underwriters may offer and sell the ordinary shares through one or more of their respective affiliates or other registered broker-dealers or selling agents.

The underwriters initially propose to offer part of the ordinary shares directly to the public at the offering price listed on the cover page of this prospectus and part to certain dealers at a price that represents a concession not in excess of $0.84 per share under the public offering price. After the initial offering of the ordinary shares, the offering price and other selling terms may from time to time be varied by the representatives.

We have granted to the underwriters an option, exercisable for 30 days from the date of this prospectus, to purchase up to 1,240,575 additional ordinary shares at the public offering price listed on the cover page of this prospectus, less underwriting discounts and commissions. The underwriters may exercise this option solely for the purpose of covering over-allotments, if any, made in connection with the offering of the ordinary shares offered by this prospectus. To the extent the option is exercised, each underwriter will become obligated, subject to certain conditions, to purchase about the same percentage of the additional ordinary shares as the number listed next to the underwriter’s name in the preceding table bears to the total number of ordinary shares listed next to the names of all underwriters in the preceding table.

The following table shows the per share and total public offering price, underwriting discounts and commissions, and proceeds before expenses to us. These amounts are shown assuming both no exercise and full exercise of the underwriters’ option to purchase up to an additional 1,240,575 ordinary shares.

|  |  |  |  | Total |
|  | Per Share |  |  | No Exercise |  |  | Full Exercise |
Public offering price |  | $ | 20.00 |  |  | $ | 165,410,000 |  |  | $ | 190,221,500 |
Underwriting discounts and commissions to be paid by us: |  | $ | 1.40 |  |  | $ | 11,578,700 |  |  | $ | 13,315,505 |
Proceeds, before expenses, to us |  | $ | 18.60 |  |  | $ | 153,831,300 |  |  | $ | 176,905,995 |

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The estimated offering expenses payable by us, exclusive of the underwriting discounts and commissions, are approximately $2.5 million. We have agreed to reimburse the underwriters for expenses relating to clearance of this offering with the Financial Industry Regulatory Authority up to $35,000.

The underwriters have informed us that they do not intend sales to discretionary accounts to exceed 5% of the total number of ordinary shares offered by them.

Our ordinary shares have been approved for listing on the Nasdaq Global Select Market under the symbol “PHVS.”

We have agreed that, without the prior written consent of the representatives on behalf of the underwriters, we will not, and will not publicly disclose an intention to, during the period ending 180 days after the date of this prospectus (the restricted period):

| • |  | offer, pledge, sell, contract to sell, sell any option or contract to purchase, purchase any option or contract to sell, grant any option, right or warrant to purchase, lend or otherwise transfer or dispose of, directly or indirectly, any ordinary shares or any securities convertible into or exercisable or exchangeable for ordinary shares;

| • |  | file any registration statement with the SEC relating to the offering of any ordinary shares or any securities convertible into or exercisable or exchangeable for ordinary shares; or

| • |  | enter into any swap or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of the ordinary shares.

whether any such transaction described above is to be settled by delivery of ordinary shares or such other securities, in cash or otherwise.

The restrictions described in the immediately preceding paragraph do not apply to us in certain circumstances, subject to certain limitations and conditions set forth in the underwriting agreement, including:

a) the issuance and sale of the ordinary shares in this offering;

b) the issuance of our ordinary shares upon the exercise of an option, award, restricted stock unit or warrant or the conversion of a security outstanding on the date of this prospectus;

c) facilitating the establishment of a trading plan on behalf of a shareholder, officer or director of the Company pursuant to Rule 10b5-1 under the Exchange Act for the transfer of ordinary shares, provided that (i) such plan does not provide for the transfer of ordinary shares during the restricted period and (ii) to the extent a public announcement or filing under the Exchange Act, if any, is required of or voluntarily made by us regarding the establishment of such plan, such announcement or filing shall include a statement to the effect that no transfer of ordinary shares may be made under such plan during the restricted period;

d) the filing by us of any registration statement on Form S-8 (or any successor form) with the SEC;

e) sales of ordinary shares on behalf of our officers named in the registration statement of which this prospectus forms a part to satisfy the withholding taxes payable upon the vesting, exercise or settlement of such officer’s equity awards pursuant to employee benefit plans described in this prospectus; or

f) the sale or issuance of or entry into an agreement to sell or issue ordinary shares or securities convertible into or exercisable for ordinary shares in connection with any (i) mergers, (ii) acquisition of securities, businesses, property, technologies or other assets, (iii) joint ventures, (iv) strategic alliances, commercial relationships or other collaborations, or (v) the assumption of employee benefit plans in connection with mergers or acquisitions; provided that the aggregate number of ordinary shares or securities convertible into or exercisable for ordinary shares that we may sell or issue or agree to sell or issue shall not exceed 10% of the total number of ordinary shares immediately following the completion of this offering.

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Our directors and officers and the holders of substantially all of our outstanding stock and stock options have agreed that, without the prior written consent of the representatives on behalf of the underwriters, they will not, and will not publicly disclose an intention to, during the period ending 180 days after the date of this prospectus (the restricted period): (1) offer, pledge, sell, contract to sell, sell any option or contract to purchase, purchase any option or contract to sell, grant any option, right or warrant to purchase, lend, or otherwise transfer or dispose of, directly or indirectly, any ordinary shares or any securities convertible into or exercisable or exchangeable for ordinary shares, (2) enter into any swap or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of the ordinary shares, or (3) make any demand for or exercise any right with respect to the registration of any ordinary shares or any security convertible into or exercisable or exchangeable for ordinary shares. These restrictions do not apply in certain circumstances, subject to certain limitations and conditions set forth in the lock-up agreements, including:

a) the registration of the offer and sale of ordinary shares pursuant to the underwriting agreement;

b) transactions relating to ordinary shares or other securities acquired in this offering (other than any issuer-directed shares purchased in this offering), in a private placement from us consummated concurrently with the completion of this offering or open market transactions after the completion of this offering;

c) transfers of ordinary shares or any security convertible into ordinary shares as a bona fide gift or gifts or by will, testamentary document or intestate succession;

d) distributions of ordinary shares or any security convertible into ordinary shares to limited partners, members, trust beneficiaries or stockholders of such director, officer or holder;

e) if such director, officer or holder is a corporation, partnership, limited liability company, trust or other business entity, to any direct or indirect affiliate (as defined in Rule 405 promulgated under the Securities Act) of such party or any investment fund or other entity controlled or managed by, or under common control or management with, such party or any investment fund or other entity that controls such party;

f) solely by operation of law, pursuant to a qualified domestic order or in connection with a divorce settlement;

g) to any trust for the direct or indirect benefit of the undersigned or the immediate family of such party (for purposes of this agreement “immediate family” shall mean any relationship by blood, marriage or adoption, not more remote than first cousin), provided that any such transfer shall not involve a disposition for value;

h) facilitating the establishment of a trading plan on behalf of a shareholder, officer or director of us pursuant to Rule 10b5-1 under the Exchange Act for the transfer of ordinary shares, provided that such plan does not provide for the transfer of ordinary shares during the restricted period and to the extent a public announcement or filing under the Exchange Act, if any, is required of or voluntarily made by or on behalf of such party or us regarding the establishment of such plan, such announcement or filing shall include a statement to the effect that no transfer of ordinary shares may be made under such plan during the restricted period;

i) transfers to us of ordinary shares or any security convertible into ordinary shares in connection with the “net” or “cashless” exercise of options or warrants or the vesting, exercise or settlement of any other equity-based award during the restricted period, in each case, granted pursuant to our equity incentive plans described in this prospectus, including any ordinary shares withheld by us or any of our subsidiaries to pay the applicable exercise price or tax withholding associated with such awards; provided (i) the restrictions contained in this agreement shall apply to ordinary shares issued upon such exercise, conversion, vesting or settlement and (ii) for any options or other awards that expire, vest or become settled during the restricted period while we are unable to transfer shares for purposes of satisfying any tax or other governmental withholding obligations, the restrictions contained in this agreement shall not apply to shares sold or otherwise withheld for that purpose;

j) pursuant to a bona fide third-party tender offer, merger, consolidation or other similar transaction made to all holders of our securities involving a change of control of us and approved by our board of directors, provided that in the event that such tender offer, merger, consolidation or other such transaction is

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not completed, such securities held by the undersigned shall remain subject to the provisions of this agreement (for purposes hereof “change of control” shall mean the transfer, whether by tender offer, merger, consolidation, spin-off or other such transaction, in one transaction or a series of related transactions, to a person or group of affiliated persons (other than an underwriter pursuant to this offering), of our voting securities if, after such transfer, such person or group of affiliated persons would hold more than 50% of the outstanding voting securities of us (or the surviving entity));

k) to us pursuant to arrangements under which we have the option to repurchase such party’s ordinary shares, which arrangements are described in this prospectus; and

l) transfers made with the prior written consent of the representatives, on behalf of the underwriters.

The representatives, in their sole discretion, may release the ordinary shares and other securities subject to the lock-up agreements described above in whole or in part at any time.

In order to facilitate the offering of the ordinary shares, the underwriters may engage in transactions that stabilize, maintain or otherwise affect the price of the ordinary shares. Specifically, the underwriters may sell more shares than they are obligated to purchase under the underwriting agreement, creating a short position. A short sale is covered if the short position is no greater than the number of shares available for purchase by the underwriters under the over-allotment option described above. The underwriters can close out a covered short sale by exercising the over-allotment option or purchasing shares in the open market. In determining the source of shares to close out a covered short sale, the underwriters will consider, among other things, the open market price of shares compared to the price available under the over-allotment option. The underwriters may also sell shares in excess of the over-allotment option, creating a naked short position. The underwriters must close out any naked short position by purchasing shares in the open market. A naked short position is more likely to be created if the underwriters are concerned that there may be downward pressure on the price of the ordinary shares in the open market after pricing that could adversely affect investors who purchase in this offering. As an additional means of facilitating this offering, the underwriters may bid for, and purchase, ordinary shares in the open market to stabilize the price of the ordinary shares. These activities may raise or maintain the market price of the ordinary shares above independent market levels or prevent or retard a decline in the market price of the ordinary shares. The underwriters are not required to engage in these activities and may end any of these activities at any time.

We and the underwriters have agreed to indemnify each other against certain liabilities, including liabilities under the Securities Act.

A prospectus in electronic format may be made available on websites maintained by one or more underwriters, or selling group members, if any, participating in this offering. The representatives may agree to allocate a number of ordinary shares to underwriters for sale to their online brokerage account holders. Internet distributions will be allocated by the representatives to underwriters that may make Internet distributions on the same basis as other allocations.

The address of Morgan Stanley & Co. LLC is 1585 Broadway New York, New York 10036. The address of BofA Securities, Inc. is One Bryant Park, New York, New York 10036. The address of SVB Leerink LLC is 1301 Avenue of the Americas, 12th Floor, New York, New York 10019.

Other Relationships

The underwriters and their respective affiliates are full service financial institutions engaged in various activities, which may include securities trading, commercial and investment banking, financial advisory, investment management, investment research, principal investment, hedging, financing and brokerage activities. Certain of the underwriters and their respective affiliates have, from time to time, performed, and may in the future perform, various financial advisory and investment banking services for us, for which they received or will receive customary fees and expenses.

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In addition, in the ordinary course of their various business activities, the underwriters and their respective affiliates may make or hold a broad array of investments and actively trade debt and equity securities (or related derivative securities) and financial instruments (including bank loans) for their own account and for the accounts of their customers and may at any time hold long and short positions in such securities and instruments. Such investment and securities activities may involve our securities and instruments. The underwriters and their respective affiliates may also make investment recommendations or publish or express independent research views in respect of such securities or instruments and may at any time hold, or recommend to clients that they acquire, long or short positions in such securities and instruments.

Pricing of the Offering

Prior to this offering, there has been no public market for our ordinary shares. The initial public offering price was determined by negotiations between us and the representatives. Among the factors considered in determining the initial public offering price were our future prospects and those of our industry in general, our sales, earnings and certain other financial and operating information in recent periods, and the price-earnings ratios, price-sales ratios, market prices of securities, and certain financial and operating information of companies engaged in activities similar to ours.

Directed Share Program

At our request, the underwriters have reserved up to 5% of the ordinary shares offered by this prospectus, for sale at the initial public offering price through a directed share program to certain individuals, including our directors, officers, employees, and certain friends and family members of these persons. The sales will be made at our direction by Morgan Stanley & Co. LLC and its affiliates through a directed share program. The number of ordinary shares available for sale to the general public in this offering will be reduced to the extent that these individuals purchase such reserved shares. Any reserved shares that are not so purchased will be offered by the underwriters to the general public on the same terms as the other ordinary shares offered by this prospectus. Shares purchased through the directed share program will not be subject to lockup restrictions with the underwriters, except in the case of shares purchased by any of our directors, officers or employees. We have agreed to indemnify Morgan Stanley & Co. LLC and its affiliates against certain liabilities and expenses, including liabilities under the Securities Act, in connection with the sales of the shares reserved for the directed share program.

Selling Restrictions

Canada

The ordinary shares may be sold only to purchasers purchasing, or deemed to be purchasing, as principal that are accredited investors, as defined in National Instrument 45-106 Prospectus Exemptions or subsection 73.3(1) of the Securities Act (Ontario), and are permitted clients, as defined in National Instrument 31-103 Registration Requirements, Exemptions and Ongoing Registrant Obligations. Any resale of the shares of our ordinary shares must be made in accordance with an exemption from, or in a transaction not subject to, the prospectus requirements of applicable securities laws.

Securities legislation in certain provinces or territories of Canada may provide a purchaser with remedies for rescission or damages if this prospectus (including any amendment thereto) contains a misrepresentation, provided that the remedies for rescission or damages are exercised by the purchaser within the time limit prescribed by the securities legislation of the purchaser’s province or territory. The purchaser should refer to any applicable provisions of the securities legislation of the purchaser’s province or territory for particulars of these rights or consult with a legal advisor.

Pursuant to section 3A.3 of National Instrument 33-105 Underwriting Conflicts, or NI 33-105, the underwriters are not required to comply with the disclosure requirements of NI 33-105 regarding underwriter conflicts of interest in connection with this offering.

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European Economic Area

This prospectus and any other document or material in connection with the offer or sale, or invitation for subscription or purchase, of our ordinary shares is not a prospectus for the purposes of the Prospectus Regulation (as defined below). This prospectus and any other document or material in connection with the offer or sale, or invitation for subscription or purchase, of our ordinary shares and any offer if made subsequently is directed only at persons in any Member State of the European Economic Area (the “EEA” and each such member state, a “Member State”) who are “qualified investors” within the meaning of Article 2(e) of the Prospectus Regulation. This prospectus and any other document or material in connection with the offer or sale, or invitation for subscription or purchase, of our ordinary shares has been prepared on the basis that any offer of ordinary shares in that Member State will be made pursuant to an exemption under the Prospectus Regulation from the requirement to publish a prospectus for offers of ordinary shares. Accordingly any person making or intending to make an offer in that Relevant State of ordinary shares which are the subject of the offering contemplated in this prospectus and any other document or material in connection with the offer or sale, or invitation for subscription or purchase, of our ordinary shares may only do so in circumstances in which no obligation arises for us or any of the underwriters to publish a prospectus pursuant to Article 3 of the Prospectus Regulation in relation to such offer. Neither us nor the underwriters have authorized, nor do they authorize, the making of any offer of ordinary shares in circumstances in which an obligation arises for us or the underwriters to publish a prospectus for such offer.

In relation to each Member State, no securities which are the subject of the offering contemplated by this prospectus and any other document or material in connection with the offer or sale, or invitation for subscription or purchase, of our ordinary shares to the public may be made in that Member State other than:

| (a) |  | to any legal entity which is a qualified investor as defined in the Prospectus Regulation;

| (b) |  | to fewer than 150 natural or legal persons (other than qualified investors as defined in the Prospectus Regulation), subject to obtaining the prior consent of the representatives; or

| (c) |  | in any other circumstances falling within Article 1(4) of the Prospectus Regulation,

provided that no such offer of shares shall require us or any of the representatives to publish a prospectus pursuant to Article 3 of the Prospectus Regulation or supplement a prospectus pursuant to Article 23 of the Prospectus Regulation and each person who initially acquires any shares or to whom any offer is made will be deemed to have represented, acknowledged and agreed to and with each of the representatives and us that it is a “qualified investor” as defined in the Prospectus Regulation.

In the case of any shares being offered to a financial intermediary as that term is used in Article 5(1) of the Prospectus Regulation, each such financial intermediary will be deemed to have represented, acknowledged and agreed that the shares acquired by it in the offer have not been acquired on a nondiscretionary basis on behalf of, nor have they been acquired with a view to their offer or resale to, persons in circumstances which may give rise to an offer of any shares to the public other than their offer or resale in a Member State to qualified investors as so defined in the Prospectus Regulation or in circumstances in which the prior consent of the representatives has been obtained to each such proposed offer or resale.

For the purposes of this provision, the expression an “offer of shares to the public” in relation to any shares in any Member State means the communication in any form and by means of sufficient information on the terms of the offer and the shares to be offered so as to enable an investor to decide to purchase shares, and the expression “Prospectus Regulation” means Regulation (EU) 2017/1129 (as amended).

United Kingdom

This prospectus and any other document or material in connection with the offer or sale, or invitation for subscription or purchase, of our ordinary shares may not be distributed or circulated to any person in the

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United Kingdom other than to (i) persons who have professional experience in matters relating to investments falling within Article 19(5) of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005, as amended (the “Order”); and (ii) high net worth entities falling within Article 49(2)(a) to (d) of the Order (all such persons together being referred to as “relevant persons”). This prospectus and any other document or material in connection with the offer or sale, or invitation for subscription or purchase, of our ordinary shares is directed only at relevant persons. Other persons should not act on this prospectus and any other document or material in connection with the offer or sale, or invitation for subscription or purchase, of our ordinary shares. This prospectus and any other document or material in connection with the offer or sale, or invitation for subscription or purchase, of our ordinary shares is confidential and is being supplied to you solely for your information and may not be reproduced, redistributed or passed on to any other person or published, in whole or in part, for any other purpose.

Any invitation or inducement to engage in investment activity (within the meaning of Section 21 of the FSMA) in connection with the issue or sale of the ordinary shares may only be communicated or caused to be communicated in circumstances in which Section 21(1) of the United Kingdom’s Financial Services and Markets Act 2000, as amended (the “FSMA”) does not apply to us.

All applicable provisions of the FSMA must be complied with in respect to anything done by any person in relation to the ordinary shares in, from or otherwise involving the United Kingdom.

In relation to the United Kingdom, no securities which are the subject of the offering contemplated by this prospectus and any other document or material in connection with the offer or sale, or invitation for subscription or purchase, of our ordinary shares to the public may be made in the United Kingdom other than:

| (a) |  | to any legal entity which is a qualified investor as defined in Article 2 of Regulation (EU) 2017/1129 as it forms part of domestic law by virtue of the European Union (Withdrawal) Act 2018, as amended by the European Union (Withdrawal Agreement) Act 2020 (“EUWA”);

| (b) |  | to fewer than 150 natural or legal persons (other than qualified investors as defined in Article 2 of Regulation (EU) 2017/1129 as it forms part of domestic law by virtue of the EUWA) in the United Kingdom subject to obtaining the prior consent of the representatives; or

| (c) |  | in any other circumstances falling within section 86 of the FSMA,

provided that no such offer of no such offer of shares shall require us or any of the representatives to publish a prospectus pursuant to section 85 of the FSMA or supplement a prospectus pursuant to Article 23 of Regulation (EU) 2017/1129 as it forms part of domestic law by virtue of the EUWA.

For the purposes of this provision, the expression “offer of shares to the public” in relation to any shares means the communication in any form and by any means of sufficient information on the terms of the offer and the shares to be offered so as to enable an investor to decide to purchase or subscribe for the shares.

Hong Kong

Our ordinary shares have not been and will not be offered or sold in Hong Kong by means of any document other than (i) in circumstances which do not constitute an offer to the public within the meaning of the Companies (Winding Up and Miscellaneous Provisions) Ordinance (Cap.32, Laws of Hong Kong), (ii) to “professional investors” within the meaning of the Securities and Futures Ordinance (Cap.571, Laws of Hong Kong) and any rules made thereunder or (iii) in other circumstances which do not result in the document being a “prospectus” within the meaning of the Companies (Winding Up and Miscellaneous Provisions) Ordinance (Cap.32, Laws of Hong Kong). No advertisement, invitation or document relating to our ordinary shares have been or will be issued or have been or will be in the possession of any person for the purpose of issue (in each case whether in Hong Kong or elsewhere), which is directed at, or the contents of which are likely to be accessed or read by, the public in Hong Kong (except if permitted to do so under the securities laws of Hong Kong) other

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than with respect to our ordinary shares which are or are intended to be disposed of only to persons outside Hong Kong or only to “professional investors” within the meaning of the Securities and Futures Ordinance (Cap.571, Laws of Hong Kong) and any rules made thereunder.

Israel

In the State of Israel this prospectus shall not be regarded as an offer to the public to purchase ordinary shares under the Israeli Securities Law, 5728-1968, which requires a prospectus to be published and authorized by the Israel Securities Authority, if it complies with certain provisions of Section 15 of the Israeli Securities Law, 5728-1968, including, inter alia, if: (i) the offer is made, distributed or directed to not more than 35 investors, subject to certain conditions (the “Addressed Investors”); or (ii) the offer is made, distributed or directed to certain qualified investors defined in the First Addendum of the Israeli Securities Law, 5728-1968, subject to certain conditions (the “Qualified Investors”). The Qualified Investors shall not be taken into account in the count of the Addressed Investors and may be offered to purchase securities in addition to the 35 Addressed Investors. The Company has not and will not take any action that would require it to publish a prospectus in accordance with and subject to the Israeli Securities Law, 5728-1968. We have not and will not distribute this prospectus or make, distribute or direct an offer to subscribe for our ordinary shares to any person within the State of Israel, other than to Qualified Investors and up to 35 Addressed Investors.

Japan

No registration pursuant to Article 4, paragraph 1 of the Financial Instruments and Exchange Law of Japan (Law No. 25 of 1948, as amended), or the FIEL, has been made or will be made with respect to the solicitation of the application for the acquisition of the ordinary shares.

Accordingly, the ordinary shares have not been, directly or indirectly, offered or sold and will not be, directly or indirectly, offered or sold in Japan or to, or for the benefit of, any resident of Japan (which term as used herein means any person resident in Japan, including any corporation or other entity organized under the laws of Japan) or to others for re-offering or re-sale, directly or indirectly, in Japan or to, or for the benefit of, any resident of Japan except pursuant to an exemption from the registration requirements, and otherwise in compliance with, the FIEL and the other applicable laws and regulations of Japan.

For Qualified Institutional Investors or QII

Please note that the solicitation for newly-issued or secondary securities (each as described in Paragraph 2, Article 4 of the FIEL) in relation to the ordinary shares constitutes either a “QII only private placement” or a “QII only secondary distribution” (each as described in Paragraph 1, Article 23-13 of the FIEL). Disclosure regarding any such solicitation, as is otherwise prescribed in Paragraph 1, Article 4 of the FIEL, has not been made in relation to the ordinary shares. The ordinary shares may only be transferred to QIIs.

For Non-QII Investors

Please note that the solicitation for newly-issued or secondary securities (each as described in Paragraph 2, Article 4 of the FIEL) in relation to the ordinary shares constitutes either a “small number private placement” or a “small number private secondary distribution” (each as is described in Paragraph 4, Article 23-13 of the FIEL). Disclosure regarding any such solicitation, as is otherwise prescribed in Paragraph 1, Article 4 of the FIEL, has not been made in relation to the ordinary shares. The ordinary shares may only be transferred en bloc without subdivision to a single investor.

Singapore

This prospectus has not been and will not be registered as a prospectus under the Securities and Futures Act, Chapter 289 of Singapore (the “SFA”) by the Monetary Authority of Singapore, and the offer of our ordinary

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shares in Singapore is made primarily pursuant to the exemptions under Section 274 and 275 of the SFA. Accordingly, this prospectus and any other document or material in connection with the offer or sale, or invitation for subscription or purchase, of our ordinary shares may not be circulated or distributed, nor may our ordinary shares be offered or sold, or be made the subject of an invitation for subscription or purchase, whether directly or indirectly, to any person in Singapore other than (i) to an institutional investor as defined in Section 4A of the SFA (an “Institutional Investor”) pursuant to Section 274 of the SFA, (ii) to an accredited investor as defined in Section 4A of the SFA (an “Accredited Investor”) or other relevant person as defined in Section 275(2) of the SFA (a “Relevant Person”) and pursuant to Section 275(1) of the SFA, or to any person pursuant to an offer referred to in Section 275(1A) of the SFA, and in accordance with the conditions, specified in Section 275 of the SFA and (where applicable) Regulation 3 of the Securities and Futures (Classes of Investors) Regulations 2018, or (iii) otherwise pursuant to, and in accordance with, the conditions of any other applicable exemption or provision of the SFA.

It is a condition of the offer that where our ordinary shares are subscribed for or acquired pursuant to an offer made in reliance on Section 275 of the SFA by a Relevant Person which is:

(a) a corporation (which is not an Accredited Investor), the sole business of which is to hold investments and the entire share capital of which is owned by one or more individuals, each of whom is an Accredited Investor; or

(b) a trust (where the trustee is not an Accredited Investor), the sole purpose of which is to hold investments and each beneficiary of the trust is an individual who is an Accredited Investor,

securities or securities-based derivatives contracts (each as defined in Section 2(1) of the SFA) of that corporation and the beneficiaries’ rights and interest (howsoever described) in that trust shall not be transferred within six months after that corporation or that trust has subscribed for or acquired our ordinary shares except:

1. to an Institutional Investor, an Accredited Investor, a Relevant Person, or which arises from an offer referred to in Section 275(1A) of the SFA (in the case of that corporation) or Section 276(4)(i)(B) of the SFA (in the case of that trust);

2. where no consideration is or will be given for the transfer;

3. where the transfer is by operation of law;

4. as specified in Section 276(7) of the SFA; or

5. as specified in Regulation 37A of the Securities and Futures (Offers of Investments) (Securities and Securities-based Derivatives Contracts) Regulations 2018.

Switzerland

The ordinary shares may not be publicly offered, directly or indirectly, in Switzerland within the meaning of the Swiss Financial Services Act (“FinSA”) and no application has or will be made to admit the ordinary shares to trading on any trading venue (exchange or multilateral trading facility) in Switzerland. Neither this prospectus nor any other offering or marketing material relating to the ordinary shares constitute a prospectus pursuant to the FinSA, and neither this prospectus nor any other offering or marketing material relating to the ordinary shares may be publicly distributed or otherwise made publicly available in Switzerland.

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EXPENSES OF THE OFFERING

Set forth below is an itemization of the total expenses, excluding underwriting discounts and commissions, which are expected to be incurred in connection with our sale of ordinary shares in the offering. With the exception of the registration fee payable to the SEC, the filing fee payable to Nasdaq and the filing fee payable to FINRA, all amounts are estimates.

|  | Amount to Be Paid |
SEC registration fee |  | $ | 19,882 |
Nasdaq listing fee |  |  | 150,000 |
FINRA filing fee |  |  | 29,034 |
Printing and engraving expenses |  |  | 310,000 |
Legal fees and expenses |  |  | 1,641,943 |
Accounting fees and expenses |  |  | 325,399 |
Miscellaneous |  |  | 23,742 |
Total |  | $ | 2,500,000 |

All amounts in the table are estimates except the SEC registration fee, the Nasdaq listing fee and the FINRA filing fee. We will pay all of the expenses of this offering.

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LEGAL MATTERS

Kirkland & Ellis LLP, New York, New York is representing us in connection with this offering. NautaDutilh N.V. will pass upon the validity of our ordinary shares offered hereby and other legal matters concerning this offering relating to Dutch law. Sidley Austin LLP, San Francisco, California, is counsel to the underwriters in connection with this offering.

EXPERTS

The financial statements as of December 31, 2019 and 2018 and for each of the two years in the period ended December 31, 2019 included in this Prospectus have been so included in reliance on the report of PricewaterhouseCoopers Accountants N.V., an independent registered public accounting firm, given on the authority of said firm as experts in auditing and accounting. The current address of PricewaterhouseCoopers Accountants N.V. is Boschdijktunnel 10, 5611 AG Eindhoven, The Netherlands.

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WHERE YOU CAN FIND MORE INFORMATION

We have filed with the SEC a registration statement (including any amendments and exhibits to the registration statement) on Form F-1 under the Securities Act with respect to our ordinary shares offered in this prospectus. This prospectus, which forms a part of the registration statement, does not contain all of the information included in the registration statement. Certain information is omitted and you should refer to the registration statement and its exhibits for that information. With respect to references made in this prospectus to any contract or other document of Pharvaris B.V., such references are not necessarily complete and you should refer to the exhibits attached to the registration statement for copies of the actual contract or document. Each statement in this prospectus relating to a document filed as an exhibit is qualified in all respects by the filed exhibit. You should read this prospectus and the documents that we reference in this prospectus and have filed as exhibits to the registration statement, of which this prospectus is a part, completely.

Upon completion of this offering, we will be subject to the information reporting requirements of the Exchange Act applicable to foreign private issuers. Accordingly, we will be required to file reports and other information with the SEC, including annual reports on Form 20-F and reports on Form 6-K. The SEC maintains an internet website that contains reports and other information about issuers, like us, that file electronically with the SEC. The address of that website is www.sec.gov. As a foreign private issuer, we will be exempt from the rules under the Exchange Act related to the furnishing and content of proxy statements, and our officers, directors and principal shareholders will be exempt from the reporting and short-swing profit recovery provisions contained in Section 16 of the Exchange Act. In addition, we will not be required under the Exchange Act to file periodic reports and financial statements with the SEC as frequently or as promptly as United States companies whose securities are registered under the Exchange Act.

We maintain a corporate website at www.pharvaris.com. The information contained on, or accessible from, or hyperlinked to our website is not a part of this prospectus and you should not consider information on our website to be part of this prospectus. We have included our website address in this prospectus solely as an inactive textual reference.

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INDEX TO FINANCIAL STATEMENTS

Audited Consolidated Financial Statements |  |  |  |
Report of Independent Registered Public Accounting Firm |  |  | F-2 |
Consolidated statements of profit or loss and other comprehensive income (loss) for the year ended December 31, 2019 and 2018 |  |  | F-3 |
Consolidated statements of financial position as of December 31, 2019 and December 31, 2018 |  |  | F-4 |
Consolidated statements of changes in equity for the year ended December 31, 2019 and December 31, 2018 |  |  | F-5 |
Consolidated statements of cash flows for the year ended December 31, 2019 and December 31, 2018 |  |  | F-6 |
Notes to the audited consolidated financial statements |  |  | F-7 |
Unaudited Condensed Consolidated Financial Statements |  |  |  |
Condensed consolidated statements of profit or loss and other comprehensive income (loss) for the nine months ended September 30, 2020 and 2019 |  |  | F-28 |
Condensed consolidated statements of financial position as of September 30, 2020 and December 31, 2019 |  |  | F-29 |
Condensed consolidated statements of changes in equity for the nine months ended September 30, 2020 and 2019 |  |  | F-30 |
Condensed consolidated statements of cash flows for the nine months ended September 30, 2020 and 2019 |  |  | F-31 |
Notes to the unaudited condensed consolidated interim financial statements |  |  | F-32 |

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the board of directors and shareholders of Pharvaris B.V.

Opinion on the Financial Statements

We have audited the accompanying consolidated statements of financial position of Pharvaris B.V. and its subsidiaries (the “Company”) as of December 31, 2019, 2018 and January 1, 2018, and the related consolidated statements of profit or loss and other comprehensive income (loss), changes in equity and cash flows for the two years in the period ended December 31, 2019, including the related notes (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2019, 2018 and January 1, 2018, and the results of its operations and its cash flows for the two years in the period ended December 31, 2019 in conformity with International Financial Reporting Standards as issued by the International Accounting Standards Board.

Basis for Opinion

These consolidated financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s consolidated financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits of these consolidated financial statements in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the consolidated financial statements are free of material misstatement, whether due to error or fraud.

Our audits included performing procedures to assess the risks of material misstatement of the consolidated financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the consolidated financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the consolidated financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ R.M.N. Admiraal RA

PricewaterhouseCoopers Accountants N.V.

Eindhoven, the Netherlands

November 10, 2020

We have served as the Company’s auditor since 2020.

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CONSOLIDATED STATEMENTS OF PROFIT OR LOSS AND OTHER COMPREHENSIVE INCOME (LOSS)

|  |  |  |  | Years ended December 31, |
|  |  |  |  | 2019 |  |  | 2018 |
|  | Notes |  |  | € |  |  | € |
Research and development expenses |  |  | 4 |  |  |  | (5,684,562 | ) |  |  | (3,645,413 | )
General and administrative expenses |  |  | 5 |  |  |  | (2,325,719 | ) |  |  | (668,121 | )
Total operating expenses |  |  |  |  |  |  | (8,010,281 | ) |  |  | (4,313,534 | )
Net foreign exchange loss |  |  |  |  |  |  | (16,881 | ) |  |  | (380 | )
Loss before income tax |  |  |  |  |  |  | (8,027,162 | ) |  |  | (4,313,914 | )
Income taxes |  |  | 11 |  |  |  | — |  |  |  | — |
Loss for the year |  |  |  |  |  |  | (8,027,162 | ) |  |  | (4,313,914 | )
Total comprehensive loss for the year, net of tax |  |  |  |  |  |  | (8,027,162 | ) |  |  | (4,313,914 | )
Loss attributable to: |  |  |  |  |  |  |  |  |  |  |  |
Equity holders of the Company |  |  |  |  |  |  | (8,027,162 | ) |  |  | (4,313,914 | )
Total comprehensive loss attributable to: |  |  |  |  |  |  |  |  |  |  |  |
Equity holders of the Company |  |  |  |  |  |  | (8,027,162 | ) |  |  | (4,313,914 | )
Loss per share attributable to the equity holders of the Company during the year |  |  |  |  |  |  |  |  |  |  |  |
Basic and diluted loss per share: |  |  | 17 |  |  |  | (1.66 | ) |  |  | (0.89 | )

The accompanying notes are an integral part of these consolidated financial statements.

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CONSOLIDATED STATEMENTS OF FINANCIAL POSITION

|  |  |  |  | As at December 31, 2019 |  |  | As at December 31, 2018 |  |  | As at January 1, 2018 |
|  | Notes |  |  | € |  |  | € |  |  | € |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-current assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment |  |  | 7 |  |  |  | 12,927 |  |  |  | — |  |  |  | — |
Current assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Receivables |  |  | 8 |  |  |  | 258,379 |  |  |  | 49,044 |  |  |  | 1,056 |
Cash and cash equivalents |  |  | 14 |  |  |  | 20,326,372 |  |  |  | 5,385,333 |  |  |  | 4,795,135 |
Total assets |  |  |  |  |  |  | 20,597,678 |  |  |  | 5,434,377 |  |  |  | 4,796,191 |
Equity and liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity |  |  | 15 |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital |  |  |  |  |  |  | 130,962 |  |  |  | 100,928 |  |  |  | 100,928 |
Share premium |  |  |  |  |  |  | 36,624,697 |  |  |  | 15,023,205 |  |  |  | 10,514,354 |
Other reserves |  |  |  |  |  |  | 392,139 |  |  |  | 275,992 |  |  |  | 175,247 |
Accumulated loss |  |  |  |  |  |  | (18,474,250 | ) |  |  | (10,447,088 | ) |  |  | (6,133,174 | )
Total equity |  |  |  |  |  |  | 18,673,548 |  |  |  | 4,953,037 |  |  |  | 4,657,355 |
Current liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trade and other payables |  |  | 9 |  |  |  | 517,771 |  |  |  | 246,983 |  |  |  | 61,408 |
Accrued liabilities |  |  | 12 |  |  |  | 1,406,359 |  |  |  | 234,357 |  |  |  | 77,428 |
Total liabilities |  |  |  |  |  |  | 1,924,130 |  |  |  | 481,340 |  |  |  | 138,836 |
Total equity and liabilities |  |  |  |  |  |  | 20,597,678 |  |  |  | 5,434,377 |  |  |  | 4,796,191 |

The accompanying notes are an integral part of these consolidated financial statements.

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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY

|  | Notes |  |  | Share capital |  |  | Share premium |  |  | Other reserves |  |  | Accumulated losses |  |  | Total equity |
|  |  | € |  |  | € |  |  | € |  |  | € |  |  | € |
Balance at January 1, 2018 |  |  |  |  |  |  | 100,928 |  |  |  | 10,514,354 |  |  |  | 175,247 |  |  |  | (6,133,174 | ) |  |  | 4,657,355 |
Total comprehensive loss |  |  |  |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (4,313,914 | ) |  |  | (4,313,914 | )
Issue of share capital |  |  | 15 |  |  |  | — |  |  |  | 4,508,851 |  |  |  | — |  |  |  | — |  |  |  | 4,508,851 |
Share-based payments |  |  | 16 |  |  |  | — |  |  |  | — |  |  |  | 100,745 |  |  |  | — |  |  |  | 100,745 |
Balance at December 31, 2018 |  |  |  |  |  |  | 100,928 |  |  |  | 15,023,205 |  |  |  | 275,992 |  |  |  | (10,447,088 | ) |  |  | 4,953,037 |
Balance at January 1, 201 9 |  |  |  |  |  |  | 100,928 |  |  |  | 15,023,205 |  |  |  | 275,992 |  |  |  | (10,447,088 | ) |  |  | 4,953,037 |
Total comprehensive loss |  |  |  |  |  |  |  |  |  |  | — |  |  |  | — |  |  |  | (8,027,162 | ) |  |  | (8,027,162 | )
Issue of share capital |  |  | 15 |  |  |  | 30,034 |  |  |  | 22,437,673 |  |  |  | — |  |  |  | — |  |  |  | 22,467,707 |
Transaction costs on issue of shares |  |  |  |  |  |  | — |  |  |  | (836,181 | ) |  |  | — |  |  |  | — |  |  |  | (836,181 | )
Share-based payments |  |  | 16 |  |  |  | — |  |  |  | — |  |  |  | 116,147 |  |  |  | — |  |  |  | 116,147 |
Balance at December 31, 2019 |  |  |  |  |  |  | 130,962 |  |  |  | 36,624,697 |  |  |  | 392,139 |  |  |  | (18,474,250 | ) |  |  | 18,673,548 |

The accompanying notes are an integral part of these consolidated financial statements.

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CONSOLIDATED STATEMENTS OF CASH FLOWS

|  |  |  |  | Years ended December 31, |
|  |  |  |  | 2019 |  |  | 2018 |
|  | Notes |  |  | € |  |  | € |
Operating activities |  |  |  |  |  |  |  |  |  |  |  |
Loss before tax |  |  |  |  |  |  | (8,027,162 | ) |  |  | (4,313,914 | )
Non-cash adjustments to reconcile loss before tax to net cash flows from operations: |  |  |  |  |  |  |  |  |  |  |  |
Share-based payment expense |  |  | 16 |  |  |  | 116,147 |  |  |  | 100,745 |
Depreciation expenses |  |  | 7 |  |  |  | 549 |  |  |  | — |
Net foreign exchange (gain) / loss |  |  |  |  |  |  | (3,693 | ) |  |  | 2,969 |
Changes in working capital: |  |  |  |  |  |  |  |  |  |  |  |
Increase in receivables |  |  |  |  |  |  | (209,335 | ) |  |  | (47,988 | )
Increase in trade and other payables |  |  |  |  |  |  | 274,481 |  |  |  | 182,606 |
Increase in accrued liabilities |  |  |  |  |  |  | 1,172,002 |  |  |  | 156,929 |
Net cash flows used in operating activities |  |  |  |  |  |  | (6,677,011 | ) |  |  | (3,918,653 | )
Investing activities |  |  |  |  |  |  |  |  |  |  |  |
Purchase of property, plant and equipment |  |  | 7 |  |  |  | (13,476 | ) |  |  | — |
Net cash flows used in investing activities |  |  |  |  |  |  | (13,476 | ) |  |  | — |
Financing activities |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issue of shares |  |  | 15 |  |  |  | 22,467,707 |  |  |  | 4,508,851 |
Transaction costs on issue of shares |  |  |  |  |  |  | (836,181 | ) |  |  | — |
Net cash flows provided by financing activities |  |  |  |  |  |  | 21,631,526 |  |  |  | 4,508,851 |
Net increase in cash and cash equivalents |  |  |  |  |  |  | 14,941,039 |  |  |  | 590,198 |
Cash and cash equivalents at the beginning of the year |  |  |  |  |  |  | 5,385,333 |  |  |  | 4,795,135 |
Cash and cash equivalents at the end of the year |  |  | 14 |  |  |  | 20,326,372 |  |  |  | 5,385,333 |

The accompanying notes are an integral part of these consolidated financial statements.

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NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

1 Corporate and Group information

This section provides general corporate and group information about Pharvaris B.V. and its subsidiaries.

1.1 Corporate information

The consolidated financial statements of Pharvaris B.V. (the “Company” or “Pharvaris”) and its subsidiaries (collectively, “The Group”) for the year ended December 31, 2019 were authorised for issue in accordance with a resolution of the directors on November 10, 2020.

Pharvaris B.V. was incorporated on September 30, 2015 and is based in Leiden, the Netherlands. The address of its registered office is J.H. Oortweg 21, Leiden. It has been registered at the Chamber of Commerce under file number 64239411.

Pharvaris is a clinical-stage biopharmaceutical company focused on the development and commercialization of innovative therapies for orphan diseases with significant unmet need, initially focused on angioedema.

1.2 Group information

Subsidiaries

The consolidated financial statements of the Group include:

Name |  | Legal seat |  |  | Country of incorporation |  |  | % of equity interest |
| 2019 |  |  | 2018 |
Pharvaris Holdings B.V. |  |  | Leiden |  |  |  | The Netherlands |  |  |  | 100 | % |  |  | n/a |
Pharvaris Netherlands B.V. |  |  | Leiden |  |  |  | The Netherlands |  |  |  | 100 | % |  |  | n/a |

Pharvaris Holdings B.V. and Pharvaris Netherlands B.V. were incorporated on September 24, 2019.

The ultimate parent company

The ultimate parent company of the Group is Pharvaris B.V., which is based in the Netherlands.

2. Summary of significant accounting policies

2.1 Basis of preparation

The consolidated financial statements of the Group have been prepared in accordance with International Financial Reporting Standards (IFRS) as issued by the International Accounting Standards Board (IASB).

These consolidated financial statements for the years ended December 31, 2018 and 2019 are the first the Group has prepared in accordance with IFRS. Refer to note 3 for information on how the Group adopted IFRS for the first time.

The consolidated financial statements have been prepared on a historical cost basis. Unless otherwise stated, the consolidated financial statements are presented in euros and all values are rounded to the nearest EUR (€), except per share amounts.

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2.2 Going concern

Pharvaris is a clinical-stage biopharmaceutical company focused on the development and commercialization of innovative therapies for orphan diseases with significant unmet need, initially focused on angioedema. These therapies will need to go through clinical development trials to achieve regulatory approval for commercialization. Therefore, Pharvaris is incurring annual research and development and other operating costs, and has no revenues to date (as is typical in the biotech industry for development stage and early commercial stage companies). As such, Pharvaris anticipates on-going negative operating cash flows for several years before the company has a product candidate ready for commercialization, if ever. This makes the Group dependent on external capital sources, being subsidies, debt capital and equity capital. The Group is currently fully financed by equity capital.

As of December 31, 2019 and 2018, the Group had cash of €20.3 million and €5.4 million, respectively. The Group incurred net losses of €8.0 million in 2019 and €4.3 million in 2018, and negative operating cash flows of €6.7 million in 2019 and €3.9 million in 2018.

On August 1, 2019, the Group completed a $66 million Series B equity financing of which $41 million was received in July 2020.

On November 3, 2020, the Group signed a $80 million Series C equity financing against issuance of 5,826,279 preferred shares C, which financing was completed on November 5, 2020. The preferred shares C automatically convert into ordinary shares upon the consummation of a qualified Initial Public Offering, combination transaction or request of the investor majority. The holders of the outstanding preferred shares C are entitled to convert the preferred shares, at any time, without payment of additional consideration into ordinary shares at a conversion rate of 1:1, which conversion rate shall be adjusted so as to reflect this ratio after any amendment of the nominal value by means of any stock splits, reclassification of shares and similar events. No obligations were agreed upon in the shareholders’ agreements to make any redemption on a certain fixed date and to transfer an amount (dividend) independent of the entity’s available economic resources.

The Group does not expect positive operating cash flows in the foreseeable future and remains dependent on additional financings to fund its research and development expenses, general and administrative expenses and financing costs. However, the Group believes that the available cash balances and the completed Series B and Series C financing, are sufficient to execute the Group’s operating plan and strategies and to meet the anticipated working capital requirements and settle all expected liabilities for a period of at least twelve months after the signing date of these financial statements.

Accordingly, the consolidated financial statements have been prepared on a going concern basis.

Impact of COVID-19

The outbreak of a novel strain of the coronavirus, specifically identified as “COVID-19”, has spread globally. Originating in China and spreading globally, COVID-19 is a virus causing potentially deadly respiratory tract infections and has impacted the global economy. In March 2020, the World Health Organization declared COVID-19 a pandemic.

The Group has taken appropriate measures to protect the safety of the employees and continuously monitors and evaluates the situation regarding COVID-19. The impact of COVID-19 to date is limited. COVID-19 ultimately may impact the clinical trials, including potential delays and restrictions on the ability to recruit and retain patients, principal investigators and healthcare employees. COVID-19 could also affect the operations of contract research organizations (CRO), or other contracted suppliers which may result in delays or disruptions in the supply of product candidates. The Group continuously monitors the situation regarding COVID-19, and the possible impact on the CROs, contract manufacturing organizations and clinical sites performing research and

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development activities for the Group. All efforts are made to develop alternatives to limit the impact of COVID-19 going forward.

Management concluded that the COVID-19 is expected to have some impact but would not have material adverse effect on the financial condition or liquidity of the Group.

2.3 Basis of consolidation

Subsidiaries are entities controlled by the Group. The Group controls an entity when it is exposed to, or has rights to, variable returns from its involvement with the entity and has the ability to affect those returns through its power over the entity. The financial statements of subsidiaries are included in the consolidated financial statements from the date on which control commences until the date on which control ceases. Intra-group balances and transactions are eliminated in the consolidation.

2.4 Segment reporting

Operating segments are identified based on whether the allocation of resources and/ or the assessment of performance of a particular component of Group’s activities are regularly reviewed as a separate operating segment by Group’s Chief Operating Decision Maker (“CODM”). By these criteria, the activities of Pharvaris are considered to be one segment which comprises the discovery, development and commercialization of oral bradykinin B2 receptor antagonists and the segmental analysis is the same as the analysis for Pharvaris as a whole. The Board of directors is identified as the CODM and reviews the consolidated operating results regularly to make decisions about the resources and to assess overall performance.

2.5 Foreign currencies

The Group’s consolidated financial statements are presented in euros, which is also the Group’s functional currency.

Transactions and balances

Transactions in foreign currencies are initially recorded by the Group’s entities at their respective functional currency spot rates at the date the transaction first qualifies for recognition.

Monetary assets and liabilities denominated in foreign currencies are translated at the functional currency spot rates of exchange at the reporting date. Differences arising on settlement or translation of monetary items are recognized in profit or loss.

Non-monetary items that are measured in terms of historical cost in a foreign currency are translated using the exchange rates at the dates of the initial transactions.

2.6 Notes to the cash flow statement

The cash flow statement has been prepared using the indirect method. The cash and cash equivalents disclosed in the cash flow statement comprises of cash at bank.

2.7 Property, Plant and Equipment

Property, plant and equipment comprises office equipment. Property, plant and equipment are stated at historical cost less accumulated depreciation. Historical cost includes expenditure that is directly attributable to the acquisition of the items. Subsequent costs are included in the asset’s carrying amount or recognized as a separate asset only when it is probable that future economic benefits associated with the item will flow to the Group and the cost of the item can be measured reliably.

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Depreciation on property, plant and equipment is calculated using the straight-line method to allocate their cost over their estimated useful lives, as follows:

| • |  | Office equipment 3-5 years

The assets’ residual values and useful lives are reviewed, and adjusted if appropriate, at each balance sheet date. An asset’s carrying amount is written down immediately to its recoverable amount if the asset’s carrying amount is larger than its estimated recoverable amount.

Gains and losses on disposals are determined by comparing proceeds with the carrying amount and are recognized in the consolidated statements of profit or loss and comprehensive income (loss).

2.8 Financial instruments—Recognition and measurement

Financial assets

Initial recognition and measurement

Financial assets are initially measured at fair value. After the initial measurement, the financial assets are subsequently classified as either measured at amortized cost, fair value through the consolidated statements of profit or loss and comprehensive income (loss).

The classification of financial assets at initial recognition depends on the financial asset’s contractual cash flow characteristics and the Group’s business model for managing them. The Group initially measures a financial asset at its fair value. Financial assets are included in Group’s statements of financial position when Pharvaris becomes a party to the contractual provisions of the instrument.

Subsequent measurement

Financial assets are subsequently measured at amortized cost. Financial assets at amortized cost are subsequently measured using the effective interest method and are subject to impairment. Gains and losses are recognized in the consolidated statements of profit or loss and other comprehensive income (loss) when the asset is derecognized, modified or impaired.

For the years ended December 31, 2019 and 2018, the Group had the following financial assets to be measured at amortized cost:

| • |  | Cash and cash equivalents

| • |  | Receivables

Derecognition

Financial assets are derecognized when the rights to receive cash flows from the investments have expired or have been transferred and where the Group has transferred substantially all risks and rewards of ownership.

Financial liabilities

Initial recognition and measurement

Financial liabilities are classified, at initial recognition, as financial liabilities at fair value through other comprehensive income, or fair value through the consolidated statements of profit or loss and other comprehensive income (loss), as payables.

All financial liabilities are recognized initially at fair value and, in the case of loans and borrowings and payables, net of directly attributable transaction costs. The Group’s financial liabilities include trade payables and accrued liabilities.

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Subsequent measurement

After initial recognition, trade payables and accrued liabilities are subsequently measured at amortized cost. Gains and losses are recognized in the consolidated statements of profit or loss and other comprehensive income (loss).

Derecognition

A financial liability is derecognized when the obligation under the liability is discharged or cancelled or is expired.

2.9 Receivables

Receivables are recognized initially at fair value and subsequently measured at amortised cost. If payment of the receivable is postponed under an extended payment deadline, fair value is measured on the basis of the discounted value of the expected payments. When a receivable is uncollectible, it is written off against the allowance account for receivables.

2.10 Cash and cash equivalents

Cash and cash equivalents comprise bank balances.

2.11 Equity

The Group classifies an instrument, or its component parts, on initial recognition as a financial liability or an equity instrument in accordance with the substance of the contractual arrangement and the definitions of a financial liability and an equity instrument.

An instrument is classified as a financial liability when it is either (i) a contractual obligation to deliver cash or another financial asset to another entity or to exchange financial assets or financial liabilities with another entity under conditions that are potentially unfavourable to the Group; or (ii) a contract that will or may be settled in the Group’s own equity instruments and is a non-derivative for which the Group is or may be obliged to deliver a variable number of the Group’s own equity instruments or a derivative that will or may be settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the Group’s own equity instruments. An equity instrument is defined as any contract that evidences a residual interest in the assets of an entity after deducting all of its liabilities. An instrument is an equity instrument only if the issuer has an unconditional right to avoid settlement in cash or another financial asset.

Ordinary shares

Ordinary shares are classified as equity.

Preferred shares

Preferred shares are equity classified as result of:

| • |  | The lack of contractual obligation to deliver cash or another financial asset to another entity, or to exchange financial assets or financial liabilities with another entity under conditions that are potentially unfavourable to the Group.

| • |  | No contractual obligation to transfer an amount (dividend) independent of the entity’s available economic resources.

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Pursuant to the shareholders’ agreement, all of the outstanding preferred shares will automatically convert into ordinary shares upon the consummation of a qualified Initial Public Offering (IPO) or on request of the majority of the issued and outstanding preferred shares. The conversion rate for the preferred shares is calculated by reference to the original issue price of relevant preferred shares, adjusted for certain anti-dilution protections.

The holders of the outstanding preferred shares are entitled to convert the preferred shares, at any time, without payment of additional consideration into ordinary shares at a conversion rate of 1:1 which conversion rate shall be adjusted so as to reflect this ratio after any amendment of the nominal value by means of any stock splits, reclassification of shares and similar events.

The Group issued two classes of preferred shares, convertible preferred shares A and convertible preferred shares B. The dividend preference is noncumulative and is only applicable when the general meeting of shareholder’s decides to make a profit distribution (Note 15).

Convertible Preferred shares A and convertible preferred shares B

Preferred shares A and preferred shares B have a dividend preference over ordinary shares. In addition, preferred shares A and preferred shares B have an anti-dilution protection that is not applicable for ordinary shares. The anti-dilution protection is under the full control of the Group and does not affect the equity classification of the preferred shares A and preferred shares B.

Preferred shares A and preferred shares B both qualify as equity. Dividends paid on the preference shares are treated as profit appropriation.

2.12 Trade and other payables

Trade and other payables are obligations to pay for goods or services that have been acquired in the ordinary course of business from suppliers. Accounts payable are classified as current liabilities if payment is due within one year or less (or in the normal operating cycle of the business if longer). If not, they are presented as non-current liabilities.

Trade and other payables are recognized initially at fair value and subsequently measured at amortized cost using the effective interest method.

2.13 Current and deferred income tax

The tax expense for the period comprises current and deferred tax. Tax effects are recognized in the consolidated statements of income or loss and comprehensive income (loss), except to the extent that it relates to items recognized in other comprehensive income or directly in equity.

The current income tax charge is calculated on the basis of the tax laws enacted or substantively enacted at the balance sheet date in the countries where the Company’s subsidiaries operate and generate taxable income. Management periodically evaluates positions taken in tax returns with respect to situations in which applicable tax regulation is subject to interpretation. It establishes provisions where appropriate on the basis of amounts expected to be paid to the tax authorities.

Deferred income tax is recognized, using the liability method, on temporary differences arising between the tax basis of assets and liabilities and their carrying amounts in the consolidated financial statements. Deferred income tax is determined using tax rates (and laws) that have been enacted or substantially enacted by the balance sheet date and are expected to apply when the related deferred income tax asset is realized or the deferred income tax liability is settled.

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Deferred income tax assets are recognized only to the extent that it is probable that future taxable profit will be available against which the temporary differences can be utilized.

Deferred income tax assets and liabilities are offset when there is a legally enforceable right to offset current tax assets against current tax liabilities and when the deferred income tax assets and liabilities relate to income taxes levied by the same taxation authority on either the taxable entity or different taxable entities where there is an intention to settle the balances on a net basis.

2.14 Share-based payment

The Company operates an equity-settled share-based compensation plan, under which it receives services as consideration for equity instruments (options or restricted stock units) of the Company. The fair value of these equity instruments granted in exchange for the services received from the participants is recognized as an expense against a credit in equity. The total amount to be expensed is determined by reference to the grant date fair value of the equity instruments granted, including the impact of any market performance vesting conditions and non-vesting conditions.

Service and non-market performance vesting conditions are included in the assumptions about the number of equity instruments that are expected to vest. The total expense is recognized over the vesting period, which is the period over which all of the specified vesting conditions are to be satisfied. If the length of the vesting period varies depending on when a non-market performance condition is satisfied, the total expense is recognized over the expected vesting period. The Group recognizes the impact of the revision to previous estimates, if any, in the consolidated statements of profit or loss and other comprehensive income (loss), with a corresponding adjustment to equity.

When options are exercised, the Company issues new shares. The proceeds received net of any directly attributable transaction costs are credited to share capital (nominal value) and share premium when the options are exercised.

2.15 Expenses

Research and development expenses

Research activities undertaken with the prospect of gaining new scientific knowledge and understanding are expensed as incurred. Development expenses are capitalized only if the cost involved can be measured reliably, the product or process under development is technically feasible, future economic benefits are probable and the Group has the intention and resources to complete development and use or sell it. Due to the regulatory environment and other types of uncertainty, management has determined that the criteria for capitalizing development costs to intangible assets, as set out in IAS 38, have not been met and therefore the Group has not capitalized any development expenses in 2019 or 2018. See Note 4 for information relating to research and development expenses incurred in the reporting period.

At each balance sheet date, the Group estimates the level of services performed by the vendors and the associated cost incurred for the services performed.

General and administrative expenses

Expenses are recognized in Group’s consolidated statements of profit or loss and other comprehensive income (loss) as expenses when incurred.

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2.16 New and amended standards and interpretations

IFRS 16 Leases

General impact and transition

In the current year, the Group has applied IFRS 16 Leases (as issued by the IASB effective January 1, 2019). IFRS 16 introduces new or amended requirements with respect to lease accounting. It introduces significant changes to lessee accounting by removing the distinction between operating and finance leases and requiring the recognition of a right-of-use asset and a lease liability at the lease commencement for all leases, except for short term leases and leases of low value assets. Details of the Group’s accounting policies under IFRS 16 are set out as below.

The Group adopted IFRS 16 using the modified retrospective method of adoption with the date of initial application of January 1, 2019. Under this method, the standard is applied retrospectively with the cumulative effect of initially applying the standard recognized at the date of initial application. The Group elected to use certain transition practical expedients, described below:

| i) |  | To not reassess upon transition whether an existing contract contains a lease; and

| ii) |  | The recognition exemptions for short-term leases (less than 12 months of lease term) and leases of low-value assets.

Impact on lessee accounting

Applying IFRS 16 for all leases, the Group:

| i) |  | Recognizes a right-of-use asset and a corresponding lease liability in the consolidated statement of financial position, initially measured at the present value of future lease payments;

| ii) |  | Recognizes depreciation of right-of-use assets and interest on lease liabilities in the consolidated statement of profit or loss; and

| iii) |  | Separates the total amount of cash paid into a principal portion (presented within financing activities) and interest (presented within operating activities) in the consolidated statement of cash flows.

Under IFRS 16, right-of-use assets will be tested for impairment in accordance with IAS 36 Impairment of Assets. This replaces the previous requirement to recognize a provision for onerous lease contracts.

For short-term leases (a lease term of 12 months or less) and leases of low-value assets, the Group has opted to recognize a lease expense on a straight-line basis as permitted by IFRS 16. This expense is presented within general and administrative expenses in the consolidated statement of profit and loss and other comprehensive income and (loss).

As at December 31, 2018, the Group did not hold any finance leases with terms greater than 12 months. As at January 1, 2019, the date of initial application of IFRS 16, the Group had no leases with terms greater than 12 months. The Group is not subject to retrospective application of IFRS 16 nor restatement of comparative information.

2.17 Standards issued but not yet effective

The standards and interpretations that are issued, but not yet effective, up to the date of issuance of the Group’s financial statements are disclosed below. The Group intends to adopt these standards, if applicable, when they become effective.

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Definition of a Business—Amendments to IFRS 3

The IASB issued amendments to the definition of a business in IFRS 3 Business Combinations to help entities determine whether an acquired set of activities and assets is a business or not. They clarify the minimum requirements for a business, remove the assessment of whether market participants are capable of replacing any missing elements, add guidance to help entities assess whether an acquired process is substantive, narrow the definitions of a business and of outputs, and introduce an optional fair value concentration test. New illustrative examples were provided along with the amendments.

The amendments must be applied to transactions that are either business combinations or asset acquisitions for which the acquisition date is on or after the beginning of the first annual reporting period beginning on or after January 1, 2020. Consequently, entities do not have to revisit such transactions that occurred in prior periods. Earlier application is permitted and must be disclosed. The Group has assessed amendments IFRS 3’s full impact and concludes that the amendments to the definition of a business in IFRS to have no impact on Group’s consolidated financial statements. The Group intends to adopt it no later than the accounting period beginning on January 1, 2020.

Definition of Material—Amendments to IAS 1 and IAS 8

In October 2018, the IASB issued amendments to IAS 1 Presentation of Financial Statements and IAS 8 to align the definition of ‘material’ across the standards and to clarify certain aspects of the definition. The new definition states that, ‘Information is material if omitting, misstating or obscuring it could reasonably be expected to influence decisions that the primary users of general purpose financial statements make on the basis of those financial statements, which provide financial information about a specific reporting entity.’

The amendments clarify that materiality will depend on the nature or magnitude of information, or both. An entity will need to assess whether the information, either individually or in combination with other information, is material in the context of the financial statements.

Although the amendments to the definition of material is not expected to have a significant impact on an entity’s financial statements, the introduction of the term ‘obscuring information’ in the definition could potentially impact how materiality judgements are made in practice, by elevating the importance of how information is communicated and organised in the financial statements.

The amendments are effective for annual periods beginning on or after January 1, 2020. The amendments must be applied prospectively. Early application is permitted and must be disclosed. The Group has assessed amendments IAS 1 and IAS 8’s full impact and intends to adopt it no later than the accounting period beginning on January 1, 2020. The amendments are not expected to have material effect on the consolidated financial statements.

2.18 Significant accounting judgements, estimates and assumptions

The preparation of the Group’s consolidated financial statements requires management to make judgements, estimates and assumptions that affect the reported amounts of expenses, income, assets and liabilities, and the accompanying disclosures. Uncertainty about these assumptions and estimates could result in outcomes that require a material adjustment to the carrying amount of assets or liabilities affected in future periods.

In the process of applying the Group’s accounting policies, management has made various judgements. Those which management has assessed to have the most significant effect on the amounts recognized in the financial statements have been discussed below.

The key assumptions concerning the future and other key sources of estimation uncertainty at the reporting date, that have a significant risk of causing a material adjustment to the carrying amounts of assets and liabilities

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within the next financial year, are also described in the individual notes. The Group based its assumptions and estimates on parameters available when the consolidated financial statements were prepared. Existing circumstances and assumptions about future developments, however, may change due to market changes or circumstances arising that are beyond the control of the Group. Such changes are reflected in the assumptions when they occur.

Share-based payments

The Group has adopted an equity-settled share-based compensation plan, pursuant to which certain participants are granted the right to acquire ordinary shares of the Company. The grants made under this plan are accounted for in accordance with the policy as stated in Note 2.14. The total amount to be expensed is determined by reference to the fair value of the options or restricted stock units granted. The fair value is measured at the date of grant using an Option Pricing model as further explained in Note 16.

Due to the lack of quoted market prices, the Group has determined the fair value for the measurement of the equity-settled transactions at the grant date with assistance of an external appraiser, considering certain assumptions relating to the volatility of stock price, the determination of an appropriate risk-free interest rate and expected dividends.

Research and development expenses

Research and development expenses are currently not capitalized but are expensed because the criteria for capitalization are not met (Note 2.15 and Note 4). At each balance sheet date, the Group estimates the level of services performed by the vendors and the associated costs incurred for the services performed. Although we do not expect the estimates to be materially different from amounts actually incurred, the understanding of the status and timing of services performed relative to the actual status and timing of services performed may vary and could result in reporting amounts that are too high or too low in any particular period.

3. First-time adoption of IFRS

These financial statements, for the year ended December 31, 2019, are the first the Group has prepared in accordance with IFRS. For periods up to and including the year ended December 31, 2018, the Group prepared its consolidated financial statements in accordance with the provisions of Title 9, Book 2 of the Dutch Civil Code and the firm pronouncements in the Dutch Accounting Standards, as published by the Dutch Accounting Standards Board (‘Raad voor de Jaarverslaggeving’) (Dutch GAAP) as local generally accepted accounting principles.

Accordingly, the Group has prepared consolidated financial statements that comply with IFRS applicable as at December 31, 2019, together with the comparative period data for the year ended December 31, 2018. In preparing the financial statements, the Group’s opening statement of financial position was prepared as at January 1, 2018, the Group’s date of transition to IFRS.

The Group did not identify any differences between Dutch GAAP and IFRS.

This note explains the adjustments made by the Group in restating its Dutch GAAP consolidated financial statements, including the consolidated statement of financial position as at January 1, 2018 and the financial statements as of, and for the year ended December 31, 2018, as disclosed in note 3.3.

3.1 Exemptions applied

IFRS 1 allows first-time adopters certain exemptions from the retrospective application of certain requirements under IFRS.

The Group has not applied any exemption.

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3.2 Estimates

The estimates at January 1, 2018 and at December 31, 2018 are consistent with those made for the same dates in accordance with Dutch GAAP. The estimates used by the Group to present these amounts in accordance with IFRS reflect conditions at January 1, 2018, the date of transition to IFRS and as at December 31, 2018.

3.3 Adjustments to Dutch GAAP financial statements as of January 1, 2018 and December 31, 2018

In connection with the audit of our consolidated financial statements for the years ended December 31, 2018 and 2019, the following errors were identified in the Dutch GAAP financial statements:

| a) |  | Adjustments in the consolidated statement of financial position as at January 1, 2018

| – |  | Transaction costs for issuance of preferred shares A of €95,418 were expensed instead of recorded through equity (share premium), resulting in a revision in equity of the same amount, from accumulated losses to share premium.

| – |  | Share based payment expenses of €175,247 were omitted from the Dutch GAAP financial statements and as such are adjusted by revision between accumulated losses and other reserves.

| – |  | An additional accrual of €21,366 has been recorded in accrued liabilities due to timing of expenses.

| b) |  | Adjustments in the consolidated financial statements as at December 31, 2018

| – |  | Share based payment expenses of €100,745 were omitted from the Dutch GAAP financial statements and as such are adjusted in the research and development expenses, general and administrative expenses and other reserves.

| – |  | An additional accrual of €218,919 has been recorded in trade payables and accrued liabilities due to timing of expenses.

| – |  | A cut-off error of €25,895 has been recorded in the receivables.

4. Research and development expenses

|  | 2019 |  |  | 2018 |
|  | € |  |  | € |
Personnel expenses (Note 6) |  |  | (131,544 | ) |  |  | (99,946 | )
Clinical expenses |  |  | (2,009,892 | ) |  |  | (205,873 | )
Pre-clinical expenses |  |  | (1,850,444 | ) |  |  | (2,449,046 | )
Manufacturing costs |  |  | (1,379,590 | ) |  |  | (870,933 | )
License costs |  |  | (300,000 | ) |  |  | — |
Intellectual Property costs |  |  | (13,092 | ) |  |  | (19,615 | )
Total research and development expenses |  |  | (5,684,562 | ) |  |  | (3,645,413 | )

Development expenses are currently not capitalized but are recorded in consolidated statements of profit or loss and other comprehensive income or loss because the recognition criteria for capitalisation are not met.

Clinical expenses, which includes costs of conducting and managing our sponsored clinical trials, including clinical investigator cost, costs of clinical sites, and costs for CRO’s assisting with our clinical development programs.

Pre-clinical expenses, which include costs of our outsourced discovery, preclinical and nonclinical development studies.

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5. General and administrative expenses

|  | 2019 |  |  | 2018 |
|  | € |  |  | € |
Personnel expenses (Note 6) |  |  | (49,601 | ) |  |  | (799 | )
Consulting fees |  |  | (990,730 | ) |  |  | (333,160 | )
Professional fees |  |  | (495,326 | ) |  |  | (62,958 | )
Accounting and auditing fees |  |  | (300,841 | ) |  |  | (111,852 | )
Travel expenses |  |  | (236,904 | ) |  |  | (84,970 | )
Facilities, communication & office expenses |  |  | (167,062 | ) |  |  | (47,536 | )
Other expenses |  |  | (85,255 | ) |  |  | (26,846 | )
Total general and administrative expenses |  |  | (2,325,719 | ) |  |  | (668,121 | )

In 2019 the Group entered into a lease arrangement, which was assessed to be a short-term lease (with a lease term of 12 months equalling its non-cancellable period). The total outflow for the leases in 2019 was € 78,897 (2018: €0) and is included in the Facilities, communication & office expenses.

Depreciation expenses of €549 (2018: €0) is included in the other expenses.

6. Personnel expenses

|  | 2019 |  |  | 2018 |
|  | € |  |  | € |
Wages and salaries |  |  | (50,573 | ) |  |  | — |
Pension charges |  |  | (1,750 | ) |  |  | — |
Other social security charges |  |  | (12,675 | ) |  |  | — |
Share-based payments |  |  | (116,147 | ) |  |  | (100,745 | )
|  |  | (181,145 | ) |  |  | (100,745 | )

Workforce

The average number of staff (in FTEs) employed by the Group in 2019 was 3 (2018: 0). No employees were employed by the Group in 2018, as the Group had contracted consultants for the operations in 2018.

7. Property, plant and equipment

|  | Notes |  |  | Office equipment |  |  | Total |
|  |  |  |  | € |  |  | € |
Balance at January 1, 2019 |  |  |  |  |  |  |  |  |  |  |  |
Opening net book amount |  |  |  |  |  |  | — |  |  |  | — |
Additions |  |  |  |  |  |  | 13,476 |  |  |  | 13,476 |
Depreciation expenses |  |  | 5 |  |  |  | (549 | ) |  |  | (549 | )
Closing net book amount |  |  |  |  |  |  | 12,927 |  |  |  | 12,927 |
Balance at December 31, 2019 |  |  |  |  |  |  |  |  |  |  |  |
Cost |  |  |  |  |  |  | 13,476 |  |  |  | 13,476 |
Accumulated depreciation |  |  |  |  |  |  | (549 | ) |  |  | (549 | )
Net book amount |  |  |  |  |  |  | 12,927 |  |  |  | 12,927 |

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8. Receivables

|  | 2019 |  |  | 2018 |  |  | As at January 1, 2018 |
|  | € |  |  | € |  |  | € |
VAT receivables |  |  | 210,843 |  |  |  | 26,423 |  |  |  | 1,056 |
Prepayments |  |  | 47,536 |  |  |  | 22,621 |  |  |  | — |
|  |  | 258,379 |  |  |  | 49,044 |  |  |  | 1,056 |

Prepayments mainly relate to prepaid rent, insurance and general and administrative expenses.

No amounts have been written off during the year.

9. Trade and other payables

|  | 2019 |  |  | 2018 |  |  | As at January 1, 2018 |
|  | € |  |  | € |  |  | € |
Trade payables |  |  | 509,948 |  |  |  | 246,356 |  |  |  | 60,472 |
Tax and social security liabilities |  |  | 7,823 |  |  |  | 627 |  |  |  | 936 |
|  |  | 517,771 |  |  |  | 246,983 |  |  |  | 61,408 |

10. Financial assets and liabilities fair value

Fair values of cash, receivables, and current liabilities approximate their carrying amounts due to the short-term maturities of these instruments.

11. Income taxes

No tax charge or income has been recognized in the years 2019 and 2018 since the Group is in a loss-making position and has a history of losses.

The Group has tax loss carry-forwards of approximately €5.9 million (2018: €2.7 million). Pharvaris has tax losses in the Netherlands that are available for offsetting against future taxable profits of the companies in which the losses arose. Under Dutch tax law, for years prior to 2019, profits in a given year can be offset against tax loss carry forwards for up to nine years. In 2019, the Dutch tax law was revised to limit the carry forward period to six years. Tax loss carry-forwards incurred in prior years will expire as follows:

Year |  | Tax losses |
|  | € million |
2025 |  |  | 3.9 |
2026 |  |  | 0.9 |
2027 |  |  | 1.1 |
Total carry-forward losses |  |  | 5.9 |

Deferred tax assets on tax loss carry forwards and deductible temporary differences in excess of taxable temporary differences have not been recognized as management concluded that there is not sufficient probability as per IAS 12 that there will be future taxable profits available in the foreseeable future against which the unused tax losses can be utilized. The accumulated unused tax losses relate entirely to the Netherlands.

The total unrecognized deferred tax assets from temporary differences amounts to €2.9 million (2018: €1.6 million).

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12. Accrued liabilities

|  | 2019 |  |  | 2018 |  |  | As at January 1, 2018 |
|  | € |  |  | € |  |  | € |
Consulting and accounting fee accruals |  |  | 436,768 |  |  |  | 129,243 |  |  |  | 27,434 |
Clinical accrued liabilities |  |  | 357,719 |  |  |  | — |  |  |  | — |
Manufacturing accrued liabilities |  |  | 283,115 |  |  |  | — |  |  |  | — |
Pre-clinical accrued liabilities |  |  | 275,460 |  |  |  | 104,549 |  |  |  | 38,774 |
Other accrued liabilities |  |  | 53,297 |  |  |  | 565 |  |  |  | 11,220 |
|  |  | 1,406,359 |  |  |  | 234,357 |  |  |  | 77,428 |

13. Financial risk management

The Group’s principal financial instruments consist of receivables, trade and other trade payables. The financial instruments represent the Group’s working capital to serve the Group’s day-to-day operations.

The Group is exposed to market risk (including currency risk, interest rate risk and price risk), credit risk and liquidity risk. The Group’s management manages each risk as discussed below.

Market risk

Currency risk

The Group operates internationally and is exposed to currency risk arising from various currency exposure, primarily with respect to the British pound and the US Dollar as the Group has agreements with Contract Research Organizations (‘CRO’s) which are based in Great Britain, and consulting agreements with parties that are based in the United States of America. From these transactions, currency risk arises. No formal policy has been set-up to manage the currency risk against the functional currency of the Group. As of December 31, 2019 and 2018, the amount of trade payables in foreign currency was limited. Foreign currency trade payables are short term in nature (generally 30 days). As a result, currency rate movements during the years presented had an immaterial effect on the consolidated financial statements.

Price risk

The market prices for the provision of preclinical and clinical materials and services, as well as external contracted research may vary over time. The commercial prices of any of the Group’s products or product candidates are currently uncertain. The Group is not exposed to commodity price risk.

Interest risk

The Group is not largely exposed to interest risk, since the Group has no borrowings.

Credit risk

Credit risk arises from cash and other financial assets, including deposits with banks and financial institutions. Cash deposits and investments are placed only with accredited financial institutions. Credit risk is further limited by investing only in liquid instruments.

The Group’s maximum exposure to credit risk for the components of the statements of financial position on December 31, 2019 and 2018 are the carrying amounts as illustrated in Note 14.

There are no financial assets past due date or impaired.

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Concentration of Credit Risk

Financial instruments that potentially expose the Group to concentrations of credit risk consist primarily of cash. Cash deposits are placed only with reputable financial institutions with a credit rating of not less than A- (Standard & Poor’s). Credit risk is further limited by investing only in liquid instruments.

Liquidity risk

Liquidity risk is the risk that the Group might encounter difficulties in meeting the obligations associated with its financial liabilities, which are normally settled by delivering cash. The Group’s approach to managing liquidity is to ensure, as far as possible, that it will always have sufficient liquidity to meet its liabilities when due.

As of December 31, 2019, the Company has cash of €20.3 million and received the second tranche ($41 million) of its Series B equity financing in July 2020.

On November 3, 2020, the Group completed a $80 million Series C equity financing which was received on November 5, 2020.

Based on the existing operating plan, anticipated working capital requirements and available capital sources, the Company believes that it can execute on strategy and realize liquidity planning and it is able to finance its activities for twelve months following the date of these financial statements.

The Company may need additional funding in the future, which could possibly not be available to the Group at all or not at acceptable or favourable terms. This could lead to a situation where the Group would have to delay the execution of parts of its business plan.

The Group manages liquidity risks by holding appropriate reserves, taking timely action for future funding, as well as by monitoring forecasted and actual cash flows and reconciling the maturity profiles of financial assets and liabilities.

The below table summarizes the maturity profile of the Group’s accrued liabilities based on contractual undiscounted payments:

|  | Less than 12 months |  |  | 1 to 5 years |  |  | Total |
December 31, 2019 |  |  | € |  |  |  | € |  |  |  | € |
Trade and other payables |  |  | 517,771 |  |  |  | — |  |  |  | 517,771 |
Accrued liabilities |  |  | 1,406,359 |  |  |  | — |  |  |  | 1,406,359 |

|  | Less than 12 months |  |  | 1 to 5 years |  |  | Total |
December 31, 2018 |  |  | € |  |  |  | € |  |  |  | € |
Trade and other payables |  |  | 246,983 |  |  |  | — |  |  |  | 246,983 |
Accrued liabilities |  |  | 234,357 |  |  |  | — |  |  |  | 234,357 |

|  | Less than 12 months |  |  | 1 to 5 years |  |  | Total |
January 1, 2018 |  |  | € |  |  |  | € |  |  |  | € |
Trade and other payables |  |  | 61,408 |  |  |  | — |  |  |  | 61,408 |
Accrued liabilities |  |  | 77,428 |  |  |  | — |  |  |  | 77,428 |

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##### Table of Contents

14. Cash and cash equivalents

|  | 2019 |  |  | 2018 |  |  | As at January 1, 2018 |
|  | € |  |  | € |  |  | € |
Cash and cash equivalents |  |  | 20,326,372 |  |  |  | 5,385,333 |  |  |  | 4,795,135 |
|  |  | 20,326,372 |  |  |  | 5,385,333 |  |  |  | 4,795,135 |

The Cash and cash equivalents balance are not subject to any restriction.

15. Equity

The capital of the Company is divided into Ordinary shares, preferred shares A and B respectively. The nominal value of each share is one eurocent (€ 0.01). Preferred shares A and B are convertible into Ordinary shares. All issued shares are fully paid.

Issued shares

|  | 2019 |  |  | 2018 |  |  | As at January 1, 2018 |
Preferred shares A |  |  | 5,242,850 |  |  |  | 5,242,850 |  |  |  | 5,242,850 |
Preferred shares B |  |  | 3,003,391 |  |  |  | — |  |  |  | — |
Ordinary shares |  |  | 4,850,000 |  |  |  | 4,850,000 |  |  |  | 4,850,000 |
|  |  | 13,096,241 |  |  |  | 10,092,850 |  |  |  | 10,092,850 |

In 2018 the third tranche of the preferred shares A was received after reaching milestones described within the shareholders’ agreement. For this final tranche and as per the shareholders’ agreement, no new shares were issued and as such the proceeds from the third tranche are fully reported as share premium.

Holders of preferred shares A and B shall be entitled to a non-cumulative, non-compounded dividend of 8% per annum of aggregate subscription price paid on such preferred shares A and B, respectively, subject to appropriate adjustment in the event of any dividend, share split, combination or similar recapitalization with respect to such preferred shares. Dividend distribution is at discretion of the Board of the Group. No dividend was distributed in 2018 or in 2019.

Preferred shares A and B shares have an anti-dilution protection. In the event of an issue of shares to any person, at a price per such share which is lower than the applicable subscription price paid for the preferred shares A or preferred Shares B, respectively then the Company shall issue, in accordance with applicable requirements to each of holder of preferred shares, such number of new shares, based upon a broad-based weighted average anti-dilution adjustment, which reduces the subscription price of the relevant preferred shares, to a weighted average price.

The anti-dilution protection is under the full control of the Company and does not affect the equity classification of the preferred shares A and preferred shares B.

16. Share-based payments

In 2016, the Group implemented an Equity Incentive Plan (the “Plan”) in order to advance the interests of the Company’s shareholders by enhancing the Company’s ability to attract, retain and motivate persons who are expected to make important contributions to the Company and by providing such persons with performance-based incentives that are intended to better align the interests of such persons with those of the Company’s shareholders.

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##### Table of Contents

Valuation of ordinary shares

The fair value of ordinary shares is determined by the Board of directors and takes into account the most recently available valuation of ordinary shares performed by an independent valuation firm and the assessment of additional objective and subjective factors we believe are relevant and which may have changed from the date of the most recent valuation through the date of the grant.

The Board of directors consider numerous objective and subjective factors to determine their best estimate of the fair value of the ordinary shares as of each grant date, including:

| • |  | the progress of the research and development programs;

| • |  | contemporaneous third-party valuations of the ordinary shares for the share issuances in 2016 and 2019;

| • |  | the rights and preferences of the preferred shares and the preferred shares relative to the ordinary shares;

| • |  | the likelihood of achieving a discrete liquidity event, such as a sale of the company or an initial public offering given prevailing market conditions; and

| • |  | external market and economic conditions impacting the industry sector.

In determining the fair values of the ordinary shares as of each award grant date, the Option Pricing Model was used. The Option Pricing Model was applied to estimate the implied total equity value of the Company using a reference price. The reference price was the investment price paid in the preferred A shares financing round, which was the most recent financing round at the time. The total equity value of the Company is then allocated to the various underlying instruments.

The main terms and conditions of the separate award agreements entered into under this Plan are provided below.

Stock Option Agreement

On March 31, 2016, the Company granted consultants an option to purchase 392,850 shares with an exercise price of € 0.01 per share with a final exercise date of March 30, 2026 unless forfeited or exercised on an earlier date. The options are equity-settled and may only be exercised in the event of a merger, sale or wind-up of the Company (the “Exercise Event”) and certain milestones have been achieved. Further, the participant must have a specific function with the Group at the time of the Exercise Event.

As at January 1, 2018, December 31, 2018 and December 31, 2019, none of the options were vested since services are required until the occurrence of an Exercise Event. As at December 31, 2019, none of the options were forfeited or have expired.

Measurement of Fair Value

The Company determined that fair value of the stock options at the date of grant to be € 1.24. The share-based payment expense are recognized over a 5-year service period in the consolidated statements of profit or loss and other comprehensive income or (loss). For the years ended December 31, 2019 and 2018 an amount of € 99,946 and € 99,946, respectively has been recognized.

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##### Table of Contents

Reconciliation of outstanding share options

|  | 2019 |  |  | Weighted average exercise price |  |  | 2018 |  |  | Weighted average exercise price |  |  | 2017 |  |  | Weighted average exercise price |
|  |  |  |  | € |  |  |  |  |  | € |  |  |  |  |  | € |
Outstanding January 1, |  |  | 392,850 |  |  |  | 0.01 |  |  |  | 392,850 |  |  |  | 0.01 |  |  |  | 392,850 |  |  |  | 0.01 |
Granted |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Exercised |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Forfeited |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Outstanding December 31, |  |  | 392,850 |  |  |  | 0.01 |  |  |  | 392,850 |  |  |  | 0.01 |  |  |  | 392,850 |  |  |  | 0.01 |

Restricted Award Agreement

On December 13, 2018, the Company granted 25,295 restricted stock units (“RSUs”) to consultants, with an exercise price of €0.01 per RSU. The RSUs shall vest upon the occurrence of an IPO or the completion of a business arrangement involving an acquisition or the option to acquire all or majority of the Company, and which arrangement is entered into as a consequence of the services rendered by the participant to the Company during the term of service or within 9 months after termination of this agreement.

As at December 31, 2019 and 2018 none of the RSUs are vested. The Company determined that fair value of the restricted stock units at the date of grant to be €1.39 per share and is recognized over the service period in the consolidated statements of profit or loss and other comprehensive income or loss. The share-based payment expense recorded the consolidated statements of profit or loss and other comprehensive income or (loss) for the years ended December 31, 2019 and 2018 amounted to €16,201 and €799, respectively.

Reconciliation of outstanding RSUs

|  | 2019 |  |  | Weighted average purchase price |  |  | 2018 |  |  | Weighted average purchase price |
|  |  |  |  | € |  |  |  |  |  | € |
Outstanding January 1, |  |  | 25,295 |  |  |  | 0.01 |  |  |  | — |  |  |  | — |
Granted |  |  | — |  |  |  | — |  |  |  | 25,295 |  |  |  | 0.01 |
Exercised |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Forfeited |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Outstanding December 31, |  |  | 25,295 |  |  |  | 0.01 |  |  |  | 25,295 |  |  |  | 0.01 |

Measurement of Fair Value

The grant date fair value of an option or an RSU is equal to the value of an ordinary share. An external valuation expert has estimated the fair value of the Company’s ordinary shares, as of the grant dates based on the pricing of the most recent financing round of the Company at the time. As Pharvaris is a private company and the equity instruments are not marketable, an Option Pricing Model (“OPM”) was applied to back-solve the Company’s total equity value such that the value per preferred A and B Share is equal to the investment price per share paid in the investment round.

This estimated total equity value has been used as input to the OPM when determining the fair value of the Company’s ordinary shares at the grant dates of March 31, 2016 (options) and December 13, 2018. The OPM uses the Black-Scholes Option-Pricing Model to determine the fair value of the Company’s different share classes based upon the Company’s total equity value.

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##### Table of Contents

The inputs used in the measurement of the fair value per ordinary share at each grant date based upon the total equity value were as follows:

|  | December 13, 2018 |  |  | March 31, 2016 |
Expected volatility (%) |  |  | 80 | % |  |  | 90 | %
Expected life (years) |  |  | 0.5 |  |  |  | 3.25 |
Risk-free interest rate (%) |  |  | -0.8 | % |  |  | -0.5 | %
Expected dividend yield |  |  | — |  |  |  | — |

Expected volatility was based on an evaluation of the historical volatilities of comparable listed biotech-companies over the historical period commensurate with the expected life. The expected life is based on Management’s best estimate on an expected exit date (such as a sale of the company or an initial public offering given prevailing market conditions). The risk-free interest rate is based on the yield on German government Strip bonds, with tenure equal to the expected life. The expected dividend yield is zero considering the stage of the Group.

17. Loss per share

Basic and diluted

Basic and diluted loss per share is calculated by dividing the loss attributable to equity holders of the Company by the weighted average number of issued and outstanding ordinary shares during the year.

The Company’s potential dilutive securities have been excluded from the computation of diluted net loss per share attributable to ordinary stockholders as the effect of including them would be antidilutive.

Potentially dilutive shares that were not included in the diluted per share calculations because they would be anti-dilutive were 5,242,850 Series A preferred shared and 3,003,391 Series B preferred shares and 5,242,850 Series A preferred shared and 3,003,391 Series B preferred shares as of December 31, 2019 and 2018.

|  | December 31, 2019 |  |  | December 31, 2018 |
|  | € |  |  | € |
Loss attributable to equity holders of the Company |  |  | (8,027,162 | ) |  |  | (4,313,914 | )
Weighted average number of ordinary shares outstanding |  |  | 4,850,000 |  |  |  | 4,850,000 |
Basic and diluted loss per share |  |  | (1.66 | ) |  |  | (0.89 | )

18. Related parties

Note 1.2 provides information about the Group’s structure, including details of the subsidiaries and the holding company. The following provides the total amount of transactions that have been entered into with related parties for the relevant financial year.

Charité Research Organisation GmbH (Charité CRO)

Dr. Knolle, who has served as Chief Scientific Officer and Chief Operating Officer since its inception, is a member of the board of Charité CRO. The Company has entered into a service contract with Charité CRO according to which Charité CRO provides services supporting research for the Company. In fiscal years 2018 and 2019 payments to Charité CRO with respect to this service contract amounted to €49,600 and €1,238,355 respectively.

The amount of outstanding payable was €0 at both December 2019 and 2018.

Key management personnel compensation

The Group engages several management entities for the purpose of providing key management services to the Group. These management entities are considered related parties, as they provide key management services

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##### Table of Contents

and the key management personnel have key management functions within these entities. Certain key management personnel are also shareholder of the Company. The aggregate amount of expense recognized in the consolidated statements of profit or loss and other comprehensive income or loss related to these related parties were €1,311,572 (2018: €1,070,616). The aggregate amounts payable to the related parties were €55,250 (2018: €103,777).

19. Commitments and contingencies

This section provides additional information about items not recognized in the financial statements but could potentially have a significant impact on the Group’s financial position and performance.

Non-cancellable service contracts

The group has entered into research and development commitments in relation to the developments of Group’s oral bradykinin B2 receptor antagonist. The future aggregate minimum payments under these research and development commitments are as follows:

Commitment for the minimum payments in relation to the non-cancellable service contracts are payable as follows:

|  | 2019 |  |  | 2018 |
|  | € |  |  | € |
Within one year |  |  | 4,005,200 |  |  |  | 853,200 |
Later than one year but not later than five years |  |  | 1,008,500 |  |  |  | 10,800 |
|  |  | 5,013,700 |  |  |  | 864,000 |

20. Contingent liabilities and contingent assets

The Group had no contingent liabilities and no contingent assets at December 31, 2019 and 2018.

21. Events after the reporting period

The outbreak of a novel strain of the coronavirus, specifically identified as “COVID-19”, has spread globally. Originating in China and spreading globally, COVID-19 is a virus causing potentially deadly respiratory tract infections and has impacted the global economy. In March 2020, the World Health Organization declared COVID-19 a pandemic. The Company has taken appropriate measures to protect the safety of the employees and continuously monitors and evaluates the situation regarding COVID-19 (see note 2.2). The impact of COVID-19 to date is limited. Management concluded that the COVID-19 is expected to have some impact but would not have material adverse effect on the financial condition or liquidity.

On January 1, 2020 and February 3, 2020, a total of 600,000 and 440,000 share options have been granted to key management personnel. The exercise price of €2.38 is equal to the fair value at the grant dates.

In 2020 the Group established Pharvaris GmbH in Switzerland and Pharvaris, Inc. in the United States of America. Pharvaris, Inc. acts as a service provider to the principal Company of the Group. Pharvaris GmbH is the principal Company of the Group starting April 1, 2020. The principal Company faces the market/external parties and making all operational group decisions.

In July 2020, the Group received a $41 million Series B equity financing, with the same terms as the existing Series B financing.

On November 3, 2020, the Company completed a $80 million Series C equity financing, which was received on November 5, 2020, pursuant to which the Company issued 5,826,279 preferred shares C.

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##### Table of Contents

Signatories to the financial statements

Leiden, November 10, 2020

Pharvaris B.V.

Board of directors

/s/ B.A.E. Modig |  | /s/ M. Kleijwegt
B.A.E. Modig |  | M. Kleijwegt

/s/ R.P.L. Droller |  | /s/ M.E. Rome
R.P.L. Droller |  | M.E. Rome

/s/ R.S. Gaster |  | /s/ J.G.C.P. Schikan
R.S. Gaster |  | J.G.C.P. Schikan

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##### Table of Contents

Unaudited Condensed Consolidated Statements of Profit or Loss and Other Comprehensive Income (Loss)

For the Nine Months Ended September 30, 2020 and 2019

|  |  |  |  | 2020 |  |  | 2019 |
|  | Notes |  |  | € |  |  | € |
Research and development expenses |  |  | 3 |  |  |  | (11,797,986 | ) |  |  | (3,154,877 | )
General and administrative expenses |  |  | 4 |  |  |  | (3,447,208 | ) |  |  | (1,409,972 | )
Total operating expenses |  |  |  |  |  |  | (15,245,194 | ) |  |  | (4,564,849 | )
Net foreign exchange loss |  |  |  |  |  |  | (176,602 | ) |  |  | (3,927 | )
Loss before income tax |  |  |  |  |  |  | (15,421,796 | ) |  |  | (4,568,776 | )
Income taxes |  |  | 6 |  |  |  | — |  |  |  | — |
Loss for the period |  |  |  |  |  |  | (15,421,796 | ) |  |  | (4,568,776 | )
Total comprehensive loss for the period, net of tax |  |  |  |  |  |  | (15,421,796 | ) |  |  | (4,568,776 | )
Loss attributable to: |  |  |  |  |  |  |  |  |  |  |  |
Equity holders of the Company |  |  |  |  |  |  | (15,421,796 | ) |  |  | (4,568,776 | )
Total comprehensive loss attributable to: |  |  |  |  |  |  |  |  |  |  |  |
Equity holders of the Company |  |  |  |  |  |  | (15,421,796 | ) |  |  | (4,568,776 | )
Loss per share attributable to the equity holders of the Company during the periods |  |  |  |  |  |  |  |  |  |  |  |
Basic and diluted loss per share: |  |  | 16 |  |  |  | (3.18 | ) |  |  | (0.94 | )

The accompanying notes are an integral part of these unaudited condensed consolidated interim financial statements.

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##### Table of Contents

Unaudited Condensed Consolidated Statements of Financial Position

|  |  |  |  | September 30, 2020 |  |  | December 31, 2019 |
|  | Notes |  |  | € |  |  | € |
Assets |  |  |  |  |  |  |  |  |  |  |  |
Non-current assets |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment |  |  | 7 |  |  |  | 43,766 |  |  |  | 12,927 |
Current assets |  |  |  |  |  |  |  |  |  |  |  |
Receivables |  |  | 8 |  |  |  | 1,062,009 |  |  |  | 258,379 |
Cash and cash equivalents |  |  | 9 |  |  |  | 41,948,476 |  |  |  | 20,326,372 |
Total assets |  |  |  |  |  |  | 43,054,251 |  |  |  | 20,597,678 |
Equity and liabilities |  |  |  |  |  |  |  |  |  |  |  |
Equity |  |  | 10 |  |  |  |  |  |  |  |  |
Share capital |  |  |  |  |  |  | 177,430 |  |  |  | 130,962 |
Share premium |  |  |  |  |  |  | 70,824,510 |  |  |  | 36,624,697 |
Other reserves |  |  |  |  |  |  | 1,442,563 |  |  |  | 392,139 |
Currency translation reserve |  |  |  |  |  |  | 361 |  |  |  | — |
Accumulated loss |  |  |  |  |  |  | (33,754,742 | ) |  |  | (18,474,250 | )
Total equity |  |  |  |  |  |  | 38,690,122 |  |  |  | 18,673,548 |
Current liabilities |  |  |  |  |  |  |  |  |  |  |  |
Trade and other payables |  |  | 11 |  |  |  | 2,819,594 |  |  |  | 517,771 |
Accrued liabilities |  |  | 12 |  |  |  | 1,544,535 |  |  |  | 1,406,359 |
Total liabilities |  |  |  |  |  |  | 4,364,129 |  |  |  | 1,924,130 |
Total equity and liabilities |  |  |  |  |  |  | 43,054,251 |  |  |  | 20,597,678 |

The accompanying notes are an integral part of these unaudited condensed consolidated interim financial statements.

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Unaudited Condensed Consolidated Statements of Changes in Equity

For the Nine Months Ended September 30, 2020

|  | Notes |  |  | Share capital |  |  | Share premium |  |  | Other reserves |  |  | Currency translation reserve |  |  | Accumulated losses |  |  | Total Equity |
|  |  |  |  | € |  |  | € |  |  | € |  |  | € |  |  | € |  |  | € |
Balance at January 1, 2019 |  |  |  |  |  |  | 100,928 |  |  |  | 15,023,205 |  |  |  | 275,992 |  |  |  | — |  |  |  | (10,447,088 | ) |  |  | 4,953,037 |
Total comprehensive loss |  |  |  |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (4,568,776 | ) |  |  | (4,568,776 | )
Issue of share capital |  |  | 10 |  |  |  | 30,034 |  |  |  | 22,437,673 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 22,467,707 |
Transaction costs on issue of shares |  |  |  |  |  |  | — |  |  |  | (836,181 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (836,181 | )
Share-based payments |  |  | 15 |  |  |  | — |  |  |  | — |  |  |  | 81,534 |  |  |  | — |  |  |  | — |  |  |  | 81,534 |
Balance at September 30, 2019 |  |  |  |  |  |  | 130,962 |  |  |  | 36,624,697 |  |  |  | 357,526 |  |  |  | — |  |  |  | (15,015,864 | ) |  |  | 22,097,321 |
Balance at January 1, 2020 |  |  |  |  |  |  | 130,962 |  |  |  | 36,624,697 |  |  |  | 392,139 |  |  |  | — |  |  |  | (18,474,250 | ) |  |  | 18,673,548 |
Total comprehensive loss |  |  |  |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (15,421,796 | ) |  |  | (15,421,796 | )
Issue of share capital |  |  | 10 |  |  |  | 46,468 |  |  |  | 34,986,290 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 35,032,758 |
Transaction costs on issue of shares |  |  |  |  |  |  | — |  |  |  | (786,477 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (786,477 | )
Currency translation reserve |  |  |  |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 361 |  |  |  | 141,304 |  |  |  | 141,665 |
Share-based payments |  |  | 15 |  |  |  | — |  |  |  | — |  |  |  | 1,050,424 |  |  |  | — |  |  |  | — |  |  |  | 1,050,424 |
Balance at September 30, 2020 |  |  |  |  |  |  | 177,430 |  |  |  | 70,824,510 |  |  |  | 1,442,563 |  |  |  | 361 |  |  |  | (33,754,742 | ) |  |  | 38,690,122 |

The accompanying notes are an integral part of these unaudited condensed consolidated interim financial statements.

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Unaudited Condensed Consolidated Statements of Cash Flows

|  |  |  |  | Nine months ended September 30, |
|  |  |  |  | 2020 |  |  | 2019 |
|  | Notes |  |  | € |  |  | € |
Operating activities |  |  |  |  |  |  |  |  |  |  |  |
Loss before tax |  |  |  |  |  |  | (15,421,796 | ) |  |  | (4,568,776 | )
Non-cash adjustments to reconcile loss before tax to net cash flows from operations: |  |  |  |  |  |  |  |  |  |  |  |
Share-based payment expense |  |  | 15 |  |  |  | 1,050,424 |  |  |  | 81,534 |
Net foreign exchange loss |  |  |  |  |  |  | 141,665 |  |  |  | 405 |
Depreciation expense |  |  | 4 |  |  |  | 4,818 |  |  |  | 107 |
Changes in working capital: |  |  |  |  |  |  |  |  |  |  |  |
Increase in receivables |  |  |  |  |  |  | (803,630 | ) |  |  | (9,804 | )
Increase in trade and other payables |  |  |  |  |  |  | 2,301,823 |  |  |  | 761,453 |
Increase in accrued liabilities |  |  |  |  |  |  | 138,176 |  |  |  | 205,138 |
Net cash flows used in operating activities |  |  |  |  |  |  | (12,588,520 | ) |  |  | (3,529,943 | )
Investing activities |  |  |  |  |  |  |  |  |  |  |  |
Purchase of property, plant and equipment |  |  | 7 |  |  |  | (35,657 | ) |  |  | (4,297 | )
Net cash flows used in investing activities |  |  |  |  |  |  | (35,657 | ) |  |  | (4,297 | )
Financing activities |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issue of shares |  |  | 10 |  |  |  | 35,032,758 |  |  |  | 22,467,707 |
Transaction costs on issue of shares |  |  |  |  |  |  | (786,477 | ) |  |  | (170,000 | )
Net cash flows provided by financing activities |  |  |  |  |  |  | 34,246,281 |  |  |  | 22,297,707 |
Net increase in cash and cash equivalents |  |  |  |  |  |  | 21,622,104 |  |  |  | 18,763,467 |
Cash and cash equivalents at the beginning of the period |  |  |  |  |  |  | 20,326,372 |  |  |  | 5,385,333 |
Cash and cash equivalents at the end of the period |  |  | 9 |  |  |  | 41,948,476 |  |  |  | 24,148,800 |

The accompanying notes are an integral part of these unaudited condensed consolidated interim financial statements.

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Notes to the Unaudited Condensed Consolidated Interim Financial Statements

1. Corporate and Group information

This section provides general corporate and group information about Pharvaris B.V. and its subsidiaries.

1.1 Corporate information

The unaudited condensed consolidated interim financial statements of Pharvaris B.V. (the “Company” or “Pharvaris”) and its subsidiaries (collectively, “The Group”) as at September 30, 2020 and December 31, 2019, and for the nine months ended September 30, 2020 and 2019 were authorised for issue in accordance with a resolution of the directors on December 18, 2020.

Pharvaris B.V. was incorporated on September 30, 2015 and is based in Leiden, the Netherlands. The address of its registered office is J.H. Oortweg 21, Leiden. It has been registered at the Chamber of Commerce under file number 64239411.

Pharvaris is a clinical-stage biopharmaceutical company focused on the development and commercialization of innovative therapies for rare diseases with significant unmet need, initially focused on angioedema.

1.2 Group information

Subsidiaries

The unaudited condensed consolidated interim financial statements of the Group include:

Name |  | Legal seat |  | Country of incorporation |  | % of equity interest as September 30, |
| 2020 |  |  | 2019 |
Pharvaris Holdings B.V. |  | Leiden |  | The Netherlands |  |  | 100 | % |  |  | 100 | %
Pharvaris Netherlands B.V. |  | Leiden |  | The Netherlands |  |  | 100 | % |  |  | 100 | %
Pharvaris GmbH |  | Zug |  | Switzerland |  |  | 100 | % |  |  | n/a |
Pharvaris, Inc. |  | Delaware |  | United States of America |  |  | 100 | % |  |  | n/a |

Pharvaris, Inc. and Pharvaris GmbH were incorporated on January 31, 2020 and March 27, 2020 respectively.

The ultimate parent company

The ultimate parent company of the Group is Pharvaris B.V., which is based in the Netherlands.

Major developments during the nine months ended September 30, 2020

On January 31, 2020 the Group established Pharvaris, Inc. in the United States of America and on March 27, 2020 the Group established Pharvaris GmbH in Switzerland. Pharvaris, Inc. acts as a service provider to the principal Company of the Group. Pharvaris GmbH is the principal Company of the Group starting April 1, 2020. The principal Company faces the market/external parties and makes all operational group decisions.

In July 2020, the Group received a $41 million (equivalent of €35 million) Series B equity financing, with the same terms as the existing Series B financing.

2. Summary of significant accounting policies

2.1 Basis of preparation

The unaudited condensed consolidated interim financial statements of the Group have been prepared in accordance with International Financial Reporting Standards (IFRS) as issued by the International Accounting Standards Board (IASB).

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The unaudited condensed consolidated interim financial statements have been prepared in accordance with IAS 34 Interim Financial Reporting, and should be read in conjunction with the Group’s annual consolidated financial statements as at and for the year ended December 31, 2019 (‘last annual financial statements’). These unaudited condensed consolidated interim financial statements do not include all the information required for a complete set financial statements prepared in accordance with IFRS as issued by the IASB. However, selected explanatory notes are included to explain events and transactions that are significant to an understanding of the changes in the Group’s financial position and performance since the last annual financial statements.

The unaudited condensed consolidated interim financial statements have been prepared on a historical cost basis. Unless otherwise stated, the unaudited condensed consolidated interim financial statements are presented in euros and all values are rounded to the nearest EUR (€), except per share amounts.

2.2 Going concern

Pharvaris is a clinical-stage biopharmaceutical company focused on the development and commercialization of innovative therapies for rare diseases with significant unmet need, initially focused on angioedema. These therapies will need to go through clinical development trials to achieve regulatory approval for commercialization. Therefore, Pharvaris is incurring annual research and development and other operating costs and has no revenues to date (as is typical in the biotech industry for development stage and early commercial stage companies). As such, Pharvaris anticipates on-going negative operating cash flows for several years before the company has a product candidate ready for commercialization, if ever. This makes the Group dependent on external capital sources, being subsidies, debt capital and equity capital. The Group is currently fully financed by equity capital.

As of September 30, 2020 and December 31, 2019, the Group had cash of €41.9 million and €20.3 million, respectively. The Group incurred net losses of €15.4 million and €4.6 million in the nine months ended September 30, 2020 and 2019, and negative operating cash flows of €12.6 million and €3.5million in the nine months ended September 30, 2020 and 2019 respectively.

On November 3, 2020, the Group signed a $80 million Series C equity financing against issuance of 5,826,279 preferred shares C, which was completed on November 5, 2020. The preferred shares C automatically convert into ordinary shares upon the consummation of a qualified Initial Public Offering, combination transaction or request of the investor majority. The holders of the outstanding preferred shares C are entitled to convert the preferred shares, at any time, without payment of additional consideration into ordinary shares at a conversion rate of 1:1, which conversion rate shall be adjusted so as to reflect this ratio after any amendment of the nominal value by means of any stock splits, reclassification of shares and similar events. No obligations were agreed upon in the shareholders’ agreements to make any redemption on a certain fixed date and to transfer an amount (dividend) independent of the entity’s available economic resources.

The Group does not expect positive operating cash flows in the foreseeable future and remains dependent on additional financings to fund its research and development expenses, general and administrative expenses and financing costs. However, the Group believes that the available cash balances and the completed Series B and Series C financing, are sufficient to execute the Group’s operating plan and strategies and to meet the anticipated working capital requirements and settle all expected liabilities for a period of at least twelve months after the issuance of these unaudited condensed consolidated interim financial statements.

Accordingly, the unaudited condensed consolidated interim financial statements have been prepared on a going concern basis.

Impact of COVID-19

The outbreak of a novel strain of the coronavirus, specifically identified as “COVID-19”, has spread globally. COVID-19 is a virus causing potentially deadly respiratory tract infections and has impacted the global economy. In March 2020, the World Health Organization declared COVID-19 a pandemic.

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The Group has taken appropriate measures to protect the safety of the employees and continuously monitors and evaluates the situation regarding COVID-19. The impact of COVID-19 to date is limited. COVID-19 ultimately may impact the clinical trials, including potential delays and restrictions on the ability to recruit and retain patients, principal investigators, and healthcare employees. COVID-19 could also affect the operations of contract research organizations (CRO), or other contracted suppliers which may result in delays or disruptions in the supply of product candidates. The Group continuously monitors the situation regarding COVID-19, and the possible impact on the CROs, contract manufacturing organizations and clinical sites performing research and development activities for the Group. All efforts are made to develop alternatives to limit the impact of COVID-19 going forward.

Management expects that COVID-19 will have some impact on the Company’s business and operations, but this is not expected to have a material adverse effect on the financial condition or liquidity of the Company.

2.3 Use of judgements and estimates

In preparing these unaudited condensed consolidated interim financial statements, management has made judgements and estimates that affect the application of accounting policies and the reported amounts of assets and liabilities, income and expense. Actual results may differ from these estimates.

The significant judgements made by management in applying the Group’s accounting policies and the key sources of estimation uncertainty were the same as those described in the last annual financial statements, except for the performance based share options granted, refer to note 15.

2.4 Change in significant accounting policies

Except as described below, the accounting policies applied in these unaudited condensed consolidated interim financial statements are the same as those applied in the last annual financial statements.

Changes in accounting policies are also expected to be reflected in the Group’s consolidated financial statements as at and for the year ending December 31, 2020.

Foreign currency translation

Transactions in foreign currencies are initially recorded by the Group’s entities at their respective functional currency spot rates at the date the transaction first qualifies for recognition.

Monetary assets and liabilities denominated in foreign currencies are translated at the functional currency spot rates of exchange at the reporting date. Differences arising on settlement or translation of monetary items are recognized in profit or loss.

Non-monetary items that are measured in terms of historical cost in a foreign currency are translated using the exchange rates at the dates of the initial transactions.

Upon consolidation, the assets and liabilities of foreign operations are translated into Euro at the rate of exchange prevailing at the reporting date and their statements of operations are translated at the average exchange rate of the fiscal period. The exchange differences arising on translation for consolidation are recognized in the unaudited condensed consolidated statements of profit or loss and other comprehensive income (loss).

Personnel expenses

Wages and salaries, social security contributions, paid leave and bonuses, and other employee benefits are recognized in the financial year in which the employee provide the associated services.

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The Group’s pension plans are classified as defined contribution plans, and, accordingly, no pension obligations are recognized in the unaudited condensed consolidated statements of financial position. Costs relating to defined contribution plans are included in the unaudited condensed consolidated statements of profit or loss and other comprehensive income (loss) in the period in which they are accrued and outstanding contributions are included in other payables.

The accounting policies on personnel expenses do not reflect a change in the accounting policies. The accounting policies became applicable as the underlying transactions and balances are material for the Group in the nine months ended September 30, 2020.

Definition of a Business—Amendments to IFRS 3

The IASB issued amendments to the definition of a business in IFRS 3 Business Combinations to help entities determine whether an acquired set of activities and assets is a business or not. They clarify the minimum requirements for a business, remove the assessment of whether market participants are capable of replacing any missing elements, add guidance to help entities assess whether an acquired process is substantive, narrow the definitions of a business and of outputs, and introduce an optional fair value concentration test. New illustrative examples were provided along with the amendments.

The amendments must be applied to transactions that are either business combinations or asset acquisitions for which the acquisition date is on or after the beginning of the first annual reporting period beginning on or after January 1, 2020. Consequently, entities do not have to revisit such transactions that occurred in prior periods. The Group has assessed amendments IFRS 3’s full impact and concludes that the amendments to the definition of a business in IFRS to have no impact on Group’s unaudited condensed consolidated interim financial statements.

Definition of Material—Amendments to IAS 1 and IAS 8

In October 2018, the IASB issued amendments to IAS 1 Presentation of Financial Statements and IAS 8 to align the definition of ‘material’ across the standards and to clarify certain aspects of the definition. The new definition states that, ‘Information is material if omitting, misstating or obscuring it could reasonably be expected to influence decisions that the primary users of general purpose financial statements make on the basis of those financial statements, which provide financial information about a specific reporting entity.’

The amendments clarify that materiality will depend on the nature or magnitude of information, or both. An entity will need to assess whether the information, either individually or in combination with other information, is material in the context of the financial statements.

Although the amendments to the definition of material is not expected to have a significant impact on an entity’s financial statements, the introduction of the term ‘obscuring information’ in the definition could potentially impact how materiality judgements are made in practice, by elevating the importance of how information is communicated and organised in the financial statements.

The amendments are effective for annual periods beginning on or after January 1, 2020. The amendments must be applied prospectively. The Group has assessed amendments IAS 1 and IAS 8’s full impact and concludes that the amendments have no material effect on the Group’s unaudited condensed consolidated interim financial statements.

IFRS 16 Leases: COVID-19-Related Rent Concessions

In May 2020, the International Accounting Standards Board (Board) issued COVID-19-Related Rent Concessions, which amended IFRS 16 Leases. The amendment permits lessees, as a practical expedient, not to assess whether particular rent concessions occurring as a direct consequence of the COVID-19 pandemic are lease modifications and instead to account for those rent concessions as if they are not lease modifications. The amendment became effective on June 30, 2020. The Group has assessed the amendment of IFRS 16 Leases’ full impact and concludes that the amendment has had no effect on the Group’s unaudited condensed consolidated financial interim statements.

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3. Research and development expenses

|  | For the nine months ended September 30 |
|  | 2020 |  |  | 2019 |
|  | € |  |  | € |
Personnel expenses (Note 5) |  |  | (1,677,630 | ) |  |  | (69,417 | )
Clinical expenses |  |  | (5,293,514 | ) |  |  | (886,152 | )
Pre-clinical expenses |  |  | (2,065,658 | ) |  |  | (1,056,826 | )
Manufacturing costs |  |  | (2,624,638 | ) |  |  | (830,088 | )
License costs |  |  | — |  |  |  | (300,000 | )
Intellectual Property costs |  |  | (136,546 | ) |  |  | (12,394 | )
Total research and development expenses |  |  | (11,797,986 | ) |  |  | (3,154,877 | )

Development expenses are currently not capitalized but are recorded in the unaudited condensed consolidated statements of profit or loss and other comprehensive income or loss because the recognition criteria for capitalization are not met.

Clinical expenses include costs of conducting and managing our sponsored clinical trials, including clinical investigator cost, costs of clinical sites, and costs for CRO’s assisting with our clinical development programs.

Pre-clinical expenses include costs of our outsourced discovery, preclinical and nonclinical development studies.

4. General and administrative expenses

|  | For the nine months ended September 30 |
|  | 2020 |  |  | 2019 |
|  | € |  |  | € |
Personnel expenses (Note 5) |  |  | (708,645 | ) |  |  | (12,117 | )
Consulting fees |  |  | (732,915 | ) |  |  | (796,447 | )
Professional fees |  |  | (656,798 | ) |  |  | (175,937 | )
Accounting, Tax- and auditing fees |  |  | (778,696 | ) |  |  | (134,606 | )
Facilities, communication & office expenses |  |  | (419,879 | ) |  |  | (78,100 | )
Travel expenses |  |  | (25,161 | ) |  |  | (143,232 | )
Other expenses |  |  | (125,114 | ) |  |  | (69,533 | )
Total general and administrative expenses |  |  | (3,447,208 | ) |  |  | (1,409,972 | )

In 2020 the Group entered into a number of lease arrangements, which were assessed to be short-term leases (with a lease term of 12 months equalling its non-cancellable period). The total outflow for the leases in 2020 was €101,002 (2019: €25,009) and is included in the Facilities, communication & office expenses.

Depreciation expense of €4,818 (2019: €107) related to property, plant and equipment is included in the other expenses.

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5. Personnel expenses

|  | For the nine months ended September 30 |
|  | 2020 |  |  | 2019 |
|  | € |  |  | € |
Wages and salaries |  |  | (1,190,877 | ) |  |  | — |
Pension charges |  |  | (46,246 | ) |  |  | — |
Other social security charges |  |  | (98,728 | ) |  |  | — |
Share-based payments |  |  | (1,050,424 | ) |  |  | (81,534 | )
|  |  | (2,386,275 | ) |  |  | (81,534 | )

The average number of staff (in FTEs) employed by the Group in the nine months ended September 30, 2020 was 6 (2019: 0). No employees were employed by the Group in nine months ended September 30, 2019, as the Group had contracted consultants for the operations in that period.

6. Income taxes

No tax charge or income has been recognized in the nine months ended September 30, 2020 and 2019 since the Group is in a loss-making position and has a history of losses. Pharvaris B.V. is the head of the fiscal unity including Pharvaris Netherlands B.V. and Pharvaris Holdings B.V.

The Group has tax loss carry-forwards of approximately €19.9 million and €5.9 million at September 30, 2020 and December 31, 2019 respectively. The Group has tax losses that are available for offsetting against future taxable profits of the companies in which the losses arose. Under Dutch tax law, for years prior to 2019, profits in a given year can be offset against tax loss carry forwards for up to nine years. In 2019, the Dutch tax law was revised to limit the carry forward period to six years. Under Swiss law, losses can be offset against future income or capital gains for seven years.

Deferred tax assets on tax loss carry forwards and deductible temporary differences in excess of taxable temporary differences have not been recognized as management concluded that there is not sufficient probability as per IAS 12 that there will be future taxable profits available in the foreseeable future against which the unused tax losses can be utilized.

The total unrecognized deferred tax assets from temporary differences amounts to €3.2 million and €2.9 million at September 30, 2020 and December 31, 2019 respectively.

7. Property, plant and equipment

|  | Notes |  |  | Office equipment |  |  | Total |
|  |  |  |  | € |  |  | € |
Balance at January 1, 2020 |  |  |  |  |  |  |  |  |  |  |  |
Opening net book amount |  |  |  |  |  |  | 12,927 |  |  |  | 12,927 |
Additions |  |  |  |  |  |  | 35,657 |  |  |  | 35,657 |
Depreciation expense |  |  | 4 |  |  |  | (4,818 | ) |  |  | (4,818 | )
Balance at September 30, 2020 |  |  |  |  |  |  | 43,766 |  |  |  | 43,766 |
Balance at September 30, 2020 |  |  |  |  |  |  |  |  |  |  |  |
Cost |  |  |  |  |  |  | 49,133 |  |  |  | 49,133 |
Accumulated depreciation |  |  |  |  |  |  | (5,367 | ) |  |  | (5,367 | )
Net book amount |  |  |  |  |  |  | 43,766 |  |  |  | 43,766 |

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During the nine months ended September 30, 2020, the Group acquired assets with a cost of €35,657 (December 31, 2019: €13,467). The acquisitions during the nine months ended September 30, 2020 and 2019 were related to equipment, tools and installations.

8. Receivables

|  | September 30, 2020 |  |  | December 31, 2019 |
|  | € |  |  | € |
Prepayments |  |  | 504,438 |  |  |  | 47,536 |
VAT receivables |  |  | 302,571 |  |  |  | 210,843 |
Other assets |  |  | 255,000 |  |  |  | — |
|  |  | 1,062,009 |  |  |  | 258,379 |

Prepayments mainly relates to prepaid retention bonus to personnel, prepaid rent, insurance and general and administrative expenses.

Other assets consist of deferred transaction costs related to Group’s Series C preferred shares financing and in-process equity financing.

9. Cash and cash equivalents

Cash and cash equivalents comprise of cash in bank and are not subject to any restriction.

10. Equity

Issued shares

|  | September 30, 2020 |  |  | December 31, 2019 |
Preferred shares A |  |  | 5,242,850 |  |  |  | 5,242,850 |
Preferred shares B |  |  | 7,650,147 |  |  |  | 3,003,391 |
Ordinary shares |  |  | 4,850,000 |  |  |  | 4,850,000 |
|  |  | 17,742,997 |  |  |  | 13,096,241 |

During the nine months ended September 30, 2020, the Company issued 4,646,576 Series B preferred shares to the existing and new investors upon completion of milestones. Each share has a par value of €0.01. As a result the issued capital of Group was increased by €46,468 and the share premium was increased by €34,199,813, net of transaction costs during the nine months ended September 30, 2020.

11. Trade and other payables

|  | September 30, 2020 |  |  | December 31, 2019 |
|  | € |  |  | € |
Trade payables |  |  | 2,729,473 |  |  |  | 509,948 |
Tax and social security liabilities |  |  | 90,121 |  |  |  | 7,823 |
|  |  | 2,819,594 |  |  |  | 517,771 |

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12. Accrued liabilities

|  | September 30, 2020 |  |  | December 31, 2019 |
|  | € |  |  | € |
Consulting and accounting fee accruals |  |  | 665,854 |  |  |  | 436,768 |
Clinical accrued liabilities |  |  | 522,180 |  |  |  | 357,719 |
Manufacturing accrued liabilities |  |  | 205,025 |  |  |  | 283,115 |
Pre-clinical accrued liabilities |  |  | 53,333 |  |  |  | 275,460 |
Personnel related accruals |  |  | 98,143 |  |  |  | — |
Other accrued liabilities |  |  | — |  |  |  | 53,297 |
|  |  | 1,544,535 |  |  |  | 1,406,359 |

13. Risk management activities

No changes have occurred regarding our risk management activities as disclosed in the notes to the consolidated financial statements as of December 31, 2019.

14. Fair values

Fair values of cash and cash equivalents, trade receivables, trade payables, and other current liabilities approximate their carrying amounts largely due to the short-term maturities of these instruments.

15. Share-based payments

In 2016, the Company implemented an Equity Incentive Plan (the “Plan”) in order to advance the interests of the Company’s shareholders by enhancing the Company’s ability to attract, retain and motivate persons who are expected to make important contributions to the Company and by providing such persons with performance-based incentives that are intended to better align the interests of such persons with those of the Company’s shareholders.

Set out below is an overview of changes in the Stock Options and RSUs during the nine months ended September 30, 2020.

|  | Stock Options |  |  | RSUs |
|  | Outstanding options |  |  | Weighted average purchase price |  |  | Outstanding RSUs |  |  | Weighted average purchase price |
Outstanding December 31,2019 |  |  | 392,850 |  |  |  | 0.01 |  |  |  | 25,290 |  |  |  | 0.01 |
Granted |  |  | 1,040,000 |  |  |  | 2.38 |  |  |  | — |  |  |  | — |
Exercised |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Forfeited |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Outstanding September 30,2020 |  |  | 1,432,850 |  |  |  | 1.73 |  |  |  | 25,290 |  |  |  | 0.01 |

On January 1, 2020 the Company has granted a total of 600,000 stock options to members of key management with an exercise price of €2.38 per share with a final exercise date of December 31, 2029 unless forfeited or exercised on an earlier date. On February 3, 2020 a total of 308,000 share options was granted to a member of key management with an exercise price of €2.38 per share with a final exercise date of February 2, 2030 unless forfeited or exercised on an earlier date. 25% of the aggregate number of share options shall vest on the 12-month anniversary of the vesting commencement date, and thereafter 1/48th of the aggregate number of share options shall vest on each subsequent monthly anniversary of the vesting commencement date until either the option is fully vested or the option holders’ continuous service terminates.

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On February 3, 2020 a total of 132,000 share options was granted to a member of key management with an exercise price of €2.38 per share with a final exercise date of February 2, 2030 unless forfeited or exercised on an earlier date. Each of 2020, 2021, 2022 is a performance period. The Board of directors needs to determine the performance goals for the related performance period before September 30 of the respective year. On July 13, 2020 the performance goals for 2020 were determined and the fair value of the related options was reassessed for the options subject to the performance goals for 2020. The fair value of the options related to the performance periods 2021 and 2022 was reassessed on September 30, 2020. One-third of the aggregate number of share options shall vest on the last day of each performance period if (i) the performance condition for the applicable performance period is achieved, as determined by the Board, and (ii) option holder remains in continuous service through the last day of such performance period.

For the nine months ended September 30, 2020, the Group has recognized €1,050,424 of share-based payment expense in the unaudited condensed consolidated statement of income or loss and other comprehensive income (loss) (nine month ended September 30, 2019: €81,534).

None of the granted Stock options and RSUs are vested as at September 30, 2020.

As Pharvaris is a private company and the equity instruments are not marketable, an Option Pricing Model (‘OPM’), with estimated probabilities of two different exit scenarios (IPO and Trade Sale), was applied to back-solve the Company’s total equity value such that the value per preferred B and C share is equal to the investment price per share paid in the investment round, which has been used for the fair value per ordinary share at January 1, 2020 and February 3, 2020. This estimated total equity value has been used as input to the OPM when determining the fair value of the Company’s ordinary shares at the measurement dates. The OPM uses the Black-Scholes Option-Pricing Model to determine the fair value of the Company’s different share classes based upon the Company’s total equity value.

The inputs used in the measurement of the fair value per ordinary share at each grant/measurement date based upon the total equity value were as follows:

|  | September 30, 2020 |  |  | July 13, 2020 |  |  | February 3, 2020 |  |  | January 1, 2020 |
Expected volatility (%) |  |  | 90 | % |  |  | 90 | % |  |  | 80 | % |  |  | 80 | %
Expected life (years) |  |  | 1.6 |  |  |  | 1.6 |  |  |  | 3.0 |  |  |  | 3.0 |
Risk-free interest rate (%) |  |  | -0.8 | % |  |  | -0.8 | % |  |  | -0.6 | % |  |  | -0.6 | %
Expected dividend yield |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |

The inputs used in the measurement of the fair value per option at each grant/measurement date using the Black-Scholes formula (including the related number of options and the fair value of the options) were as follows:

|  | September 30, 2020 |  |  | July 13, 2020 |  |  | February 3, 2020 |  |  | January 1, 2020 |
Number of options |  |  | 88,000 |  |  |  | 44,000 |  |  |  | 308,000 |  |  |  | 600,000 |
Fair value of the options |  | € | 6.08 |  |  | € | 4.74 |  |  | € | 1.66 |  |  | € | 1.67 |
Fair value of the ordinary shares |  | € | 7.25 |  |  | € | 5.82 |  |  | € | 2.38 |  |  | € | 2.38 |
Exercise price |  | € | 2.38 |  |  | € | 2.38 |  |  | € | 2.38 |  |  | € | 2.38 |
Expected volatility (%) |  |  | 85 | % |  |  | 85 | % |  |  | 85 | % |  |  | 85 | %
Expected life (years) |  |  | 6.0 |  |  |  | 6.0 |  |  |  | 6.1 |  |  |  | 6.1 |
Risk-free interest rate (%) |  |  | -0.6 | % |  |  | -0.6 | % |  |  | -0.6 | % |  |  | -0.4 | %
Expected dividend yield |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |

Expected volatility was based on an evaluation of the historical volatilities of comparable listed biotech-companies over the most recent historical period that commensurate with the expected option life. The expected life is based on Management’s best estimate of when the options will be exercised. The risk-free interest rate is based on the yield on German government Strip bonds, with tenure equal to the expected life. The expected dividend yield is zero considering the stage of the Group.

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Reference is made to Note 5 for allocation of expenses in lines of the unaudited condensed consolidated statement of income or loss and other comprehensive income (loss).

16. Loss per share

Basic and diluted

Basic and diluted loss per share is calculated by dividing the loss attributable to equity holders of the Company by the weighted average number of issued and outstanding ordinary shares during the nine months ended September 30, 2020 and 2019.

The Company’s potential dilutive securities have been excluded from the computation of diluted net loss per share attributable to ordinary stockholders as the effect of including them would be antidilutive.

Potentially dilutive shares that were not included in the diluted per share calculations because they would be anti-dilutive were 5,242,850 Series A preferred shared and 7,650,147 Series B preferred shares as of September 30, 2020 and 5,242,850 Series A preferred shared and 3,003,391 Series B preferred shares as of September 30, 2019.

|  | September 30, 2020 |  |  | September 30, 2019 |
|  | € |  |  | € |
Loss attributable to equity holders of the Company |  |  | (15,421,796 | ) |  |  | (4,568,776 | )
Weighted average number of ordinary shares outstanding |  |  | 4,850,000 |  |  |  | 4,850,000 |
Basic and diluted loss per share |  |  | (3.18 | ) |  |  | (0.94 | )

17. Commitments and Contingencies

Claims

There are no material claims known to management related to the activities of the Group.

Research and development commitments

The Group’s research and development commitments amounted to €7,621,000 as at September 30, 2020 (December 31, 2019: €5,013,700), all of which is due within 3 years.

Contingencies

The Group had no contingent liabilities and no contingent assets at September 30, 2020.

18. Related parties

Note 1.2 provides information about the Group’s structure, including details of the subsidiaries and the holding company. The following provides the total amount of transactions that have been entered into with related parties for the relevant financial period.

Charité Research Organisation GmbH (Charité CRO)

Dr. Knolle, who has served as Chief Scientific Officer and Chief Operating Officer since its inception, is a member of the board of Charité CRO. The Group has entered into a service contract with Charité CRO according to which Charité CRO provides services supporting research for the Group. The aggregate transaction value of the transactions with Charité CRO during the nine months ended September 30, 2020 and 2019 were €1,018,625 and €504,607, respectively. The outstanding balances with Charité CRO amounts €662,022 and €0 on September 30, 2020 and December 31, 2019 respectively.

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Key management personnel compensation

|  | Nine months ended September 30, |
|  | 2020 |  |  | 2019 |
Short term employee benefits |  |  | 1,022,417 |  |  |  | — |
Post employee benefits |  |  | 31,203 |  |  |  | — |
Share-based payments |  |  | 607,543 |  |  |  | — |
Total |  |  | 1,661,163 |  |  |  | — |

An amount of €220,000 of the short term employee benefits is capitalized on the unaudited condensed consolidated statements of financial position, and will be recognized in the Group’s statements of profit or loss and other comprehensive income (loss) in the period between October 2020 and June 2021.

A total of 1,040,000 stock options are granted to key management during the nine months ended September 30, 2020. Refer to note 15 for disclosure on the share-based payments.

The Group engages several management entities for the purpose of providing key management services to the Group. The aggregate value of transactions related to key management personnel, or entities which they control were €1,217,298 and €937,753 in the nine months ended September 30, 2020 and 2019, respectively.

The outstanding balances payable to key management personnel, or entities which they control, as per September 30, 2020 and December 31, 2019 were €194,509 and €55,250 respectively.

19. Events after the reporting period

On November 3, 2020, the Company completed a $80 million Series C equity financing, which financing was received on November 5, 2020, pursuant to which the Company issued 5,826,279 preferred shares C.

On December 17, 2020 the Board of directors has approved a total grant of 129,650 restricted stock units (RSUs) and 32,445 share options to Group’s employees and consultants.

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Signatories to the unaudited condensed consolidated interim financial statements

Leiden, December 18, 2020
Pharvaris B.V. Board of directors
/s/ B.A.E. Modig |  |  |  | /s/ M. Kleijwegt
B.A.E. Modig |  |  |  | M. Kleijwegt
/s/ R.P.L. Droller |  |  |  | /s/ M.E. Rome
R.P.L. Droller |  |  |  | M.E. Rome
/s/ R.S. Gaster |  |  |  | /s/ J.G.C.P. Schikan
R.S. Gaster |  |  |  | J.G.C.P. Schikan

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8,270,500 Ordinary Shares

Prospectus

Joint Book-Running Managers

Morgan Stanley

BofA Securities

SVB Leerink

Co-Managers

Oppenheimer & Co.

Kempen & Co

February 4, 2021

Through and including March 1, 2021 (the 25th calendar date after the date of this prospectus), all dealers effecting transactions in these securities, whether or not participating in this offering, may be required to deliver a prospectus. This is in addition to the dealers’ obligation to deliver a prospectus when acting as underwriters and with respect to their unsold allotments or subscriptions.