10-K 1 etnb-10k_20201231.htm 10-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

(Mark One)

☒ | ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2020

OR

☐ | TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO

Commission File Number 001-39122

89bio, Inc.

(Exact name of Registrant as specified in its Charter)

Delaware |  | 36-4946844
(State or other jurisdiction of incorporation or organization) |  | (I.R.S. Employer Identification No.)
142 Sansome Street, Second Floor San Francisco, California 94104 |  | 94104
(Address of principal executive offices) |  | (Zip Code)

Registrant’s telephone number, including area code: (415) 500-4614

Securities registered pursuant to Section 12(b) of the Act:

Title of each class |  | Trading Symbol(s) |  | Name of each exchange on which registered
Common stock, par value $0.001 per share |  | ETNB |  | Nasdaq Global Market

Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark if the Registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. YES ☐ NO ☒

Indicate by check mark if the Registrant is not required to file reports pursuant to Section 13 or 15(d) of the Act. YES ☐ NO ☒

Indicate by check mark whether the Registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the Registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. YES ☒ NO ☐

Indicate by check mark whether the Registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the Registrant was required to submit such files). YES ☒ NO ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer |  | ☐ |  | Accelerated filer |  | ☐
Non-accelerated filer |  | ☒ |  | Smaller reporting company |  | ☒
Emerging growth company |  | ☒ |  |  |  |

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☐

Indicate by check mark whether the Registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). YES ☐ NO ☒

The aggregate market value of the voting and non-voting common equity held by non-affiliates of the Registrant as of June 30, 2020, the last business day of the Registrant’s most recently completed second fiscal quarter, was approximately $72,707,052, based on the closing price on The Nasdaq Global Market reported for such date. Shares of common stock held by each officer and director and by each person who is known to own 10% or more of the outstanding common stock have been excluded in that such persons may be deemed to be affiliates of the Registrant. This determination of affiliate status is not necessarily a conclusive determination for other purposes.

As of March 1, 2021, there were 19,946,426 shares of the Registrant’s common stock outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the registrant’s definitive proxy statement relating to its 2021 Annual Meeting of Stockholders, to be held on or about June 2, 2021, are incorporated by reference into Part III of this Annual Report on Form 10-K where indicated. Such proxy statement will be filed with the U.S. Securities and Exchange Commission within 120 days after the end of the fiscal year to which this report relates.

Table of Contents

|  | Page
PART I |  |
Item 1. | Business | 3
Item 1A. | Risk Factors | 32
Item 1B. | Unresolved Staff Comments | 51
Item 2. | Properties | 51
Item 3. | Legal Proceedings | 51
Item 4. | Mine Safety Disclosures | 51
PART II |  |
Item 5. | Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities | 52
Item 6. | Selected Financial Data | 52
Item 7. | Management’s Discussion and Analysis of Financial Condition and Results of Operations | 53
Item 7A. | Quantitative and Qualitative Disclosures About Market Risk | 60
Item 8. | Financial Statements and Supplementary Data | 61
Item 9. | Changes in and Disagreements With Accountants on Accounting and Financial Disclosure | 83
Item 9A. | Controls and Procedures | 83
Item 9B. | Other Information | 84
PART III |  |
Item 10. | Directors, Executive Officers and Corporate Governance | 85
Item 11. | Executive Compensation | 85
Item 12. | Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters | 85
Item 13. | Certain Relationships and Related Transactions, and Director Independence | 85
Item 14. | Principal Accounting Fees and Services | 85
PART IV |  |
Item 15. | Exhibits, Financial Statement Schedules | 86
Item 16. | Form 10-K Summary | 89
SIGNATURES | 90

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FORWARD-LOOKING STATEMENTS

This Annual Report on Form 10-K contains “forward-looking statements” within the meaning of the federal securities laws, which statements involve substantial risks and uncertainties. All statements, other than statements of historical facts included in this Annual Report on Form 10-K, including statements concerning our plans, objectives, goals, strategies, future events, future revenues or performance, financing needs, plans or intentions relating to acquisitions, business trends and other information referred to in “Business,” “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” are forward-looking statements. Forward-looking statements generally relate to future events or our future financial or operating performance. In some cases, you can identify forward-looking statements by terms such as “may,” “might,” “will,” “objective,” “intend,” “should,” “could,” “can,” “would,” “expect,” “believe,” “design,” “estimate,” “predict,” “potential,” “plan,” “anticipate,” “target,” “forecast,” or the negative of these terms, and similar expressions intended to identify forward-looking statements. Forward-looking statements are not historical facts and reflect our current views with respect to future events and are based on assumptions and subject to risks and uncertainties. Given these uncertainties, you should not place undue reliance on these forward-looking statements.

There are a number of risks, uncertainties and other important factors that could cause our actual results to differ materially from the forward-looking statements contained in this Annual Report on Form 10-K. Such risks, uncertainties and other important factors include, among others, the risks, uncertainties and factors set forth in “Risk Factors,” and the following risks, uncertainties and factors:

| • | our plans to develop and commercialize BIO89-100 or any future product candidates;

| • | our ongoing and planned clinical trials;

| • | the timing of and our ability to obtain regulatory approvals for BIO89-100 or any future product candidates;

| • | the effect of the ongoing COVID-19 pandemic on our business;

| • | our estimates regarding expenses, future revenue, capital requirements and needs for additional financing;

| • | our ability to identify additional products or product candidates with significant commercial potential that are consistent with our commercial objectives;

| • | the rate and degree of market acceptance and clinical utility of BIO89-100 or any future product candidates, if approved;

| • | our commercialization, marketing and manufacturing capabilities and strategy;

| • | significant competition in our industry;

| • | our intellectual property position;

| • | loss of key members of management;

| • | failure to successfully execute our growth strategy, including any delays in our planned future growth; and

| • | our failure to maintain effective internal controls.

There may be other factors that may cause our actual results to differ materially from the forward-looking statements, including factors disclosed in “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations.” You should evaluate all forward-looking statements made in this Annual Report on Form 10-K in the context of these risks and uncertainties.

We caution you that the risks, uncertainties and other factors referred to above may not contain all of the risks, uncertainties and other factors that are important to you. In addition, we cannot assure you that we will realize the results, benefits or developments that we expect or anticipate or, even if substantially realized, that they will result in the consequences or affect us or our business in the way expected. All forward-looking statements in this Annual Report on Form 10-K apply only as of the date made and are expressly qualified in their entirety by the cautionary statements included in this Annual Report on Form 10-K. We undertake no obligation to publicly update or revise any forward-looking statements to reflect subsequent events or circumstances.

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PART I

In this Annual Report on Form 10-K, unless context otherwise requires or where otherwise indicated, the terms “89bio” “we,” “us,” “our,” “our company,” “the company,” and “our business” refer to 89bio, Inc. and its consolidated subsidiaries.

Item 1. Business.

Overview

89bio is a clinical-stage biopharmaceutical company focused on the development and commercialization of innovative therapies for the treatment of liver and cardio-metabolic diseases. Our lead product candidate, BIO89-100, a specifically engineered glycoPEGylated analog of fibroblast growth factor 21 (“FGF21”), is currently being developed for the treatment of nonalcoholic steatohepatitis (“NASH”) and for the treatment of severe hypertriglyceridemia (“SHTG”). NASH is a severe form of nonalcoholic fatty liver disease (“NAFLD”), characterized by inflammation and fibrosis in the liver that can progress to cirrhosis, liver failure, hepatocellular carcinoma (“HCC”) and death. There are currently no approved products for the treatment of NASH. In September 2020, we announced positive topline data from the Phase 1b/2a trial of BIO89-100 in NASH. We plan to initiate a Phase 2b trial in NASH patients in the first half of 2021. In December 2020, we initiated a paired-biopsy open-label cohort as part of the Phase 1b/2a trial in NASH patients assessing histology endpoints with topline data anticipated by the end of 2021. SHTG is a condition identified by severely elevated levels of triglycerides (greater than or equal to 500 mg/dL), which is associated with an increased risk of NASH, cardiovascular events and acute pancreatitis. We initiated our Phase 2 trial (ENTRIGUE) in SHTG patients in the third quarter of 2020 and expect to report topline data in the second half of 2021.

FGF21 is a metabolic hormone that regulates energy expenditure and glucose and lipid metabolism. FGF21 analogs represent a promising class of drugs to treat NASH, because they not only address the liver manifestations, but also have an effect on the multiple co-morbidities that worsen NASH. FGF21 is a clinically-validated mechanism that has been shown in humans to reduce steatosis, improve the histological features of NASH and address cardio-metabolic dysregulation. It is thought to exert effects on liver fibrosis by improving metabolic regulation, which reduces ongoing liver injury thus giving the liver time to heal. FGF21 also generates an on-target effect to increase adiponectin, a hormone released from adipose tissue that, among other functions, can suppress development and progression of hepatic fibrosis. However, FGF21 in its native form suffers from a short half-life and a tendency to aggregate in solution, both of which impact its suitability as a viable drug. To address these challenges, we have specifically engineered BIO89-100 to extend the half-life of the molecule while maintaining potency and thereby the clinical benefits of FGF21.

BIO89-100 may be a differentiated FGF21 therapy based on its robust and durable biological effects, a favorable tolerability profile and its potential for every two-week dosing. Combining these characteristics with the ability to address the key liver pathologies in NASH, as well as the underlying metabolic dysregulation in NASH patients, BIO89-100 has the potential to become a backbone of treatment in NASH. BIO89-100 also has a long half-life which allows convenient weekly or every-two-week dosing that will support adoption and compliance amongst patients living with this chronic, progressive and generally asymptomatic liver disease. It is currently the only FGF21 analog being tested for every-two-week dosing. BIO89-100 is also being developed as a liquid formulation, which will be convenient for patients to administer.

BIO89-100 has been evaluated in multiple animal studies of NASH, diabetes and obesity, including studies in mice and non-human primates and has completed a Phase 1a first-in-human single ascending dose (“SAD”) clinical trial in 58 healthy volunteers. In these preclinical studies and in the SAD trial, consistent beneficial effects across a range of relevant endpoints were observed. In the SAD trial, BIO89-100 demonstrated a favorable tolerability profile and a half-life of 55 to 100 hours. At doses of 9.1 mg and higher, significant improvements in key lipid parameters were observed at Day 8 and Day 15 after dosing on Day 1. BIO89-100 was well tolerated across the dose range in this trial. There were no deaths, serious adverse events or discontinuations due to adverse events. The most commonly observed treatment-related adverse events, occurring in at least two subjects in the pooled BIO89-100 group, were injection site reactions and headache, all of which were reported as mild. In April 2020, we announced data from a preclinical study with BIO89-100 demonstrating low nanomolar potency against FGF receptors 1c, 2c and 3c similar to recombinant human FGF21 (“rhFGF21”).

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In September 2020, we announced positive topline data from a Phase 1b/2a study in NASH patients, which has informed the advancement of our clinical strategy in NASH. Th is 13-week phase 1b/2a multicenter, randomized, double-blind, placebo-controlled, multiple ascending dose-ranging trial enrolled a total of 81 patients with biopsy-confirmed NASH and phenotypic NASH (“PNASH”). All dose groups in the trial demonstrated statistically significant reductions in liver fat at week 13, with relative reduction of up to 60% versus baseline, and up to 70% versus placebo, as measured by magnetic resonance imaging—proton density fat factor (“MRI-PDFF”). A majority of patients achieved a ≥ 30% (up to 88%) or a ≥ 50% (up to 71%) reduction in liver fat from baseline. ALT, a liver enzyme, was significantly reduced (up to 44%) in these patients and key lipid markers like triglycerides, LDL, and non-HDL were also significantly improved. B aseline characteristics were similar across the sub-populations of biopsy-confirmed NASH and PNASH patients enrolled in the trial and r esults were also consistent across the two sub-groups. In this study, BIO89-100 presented a favorable safety and tolerability profile with rates of gastrointestinal side effects such as nausea, diarrhea and vomiting similar to placebo. No adverse effects on blood pressure or heart rate were observed and no hypersensitivity adverse events were reported. In March 2021, we presented a new analysis of data from this study that showed that BIO89-100 treatment resulted in significant reductions in liver volume of up to 15% and liver fat volume of up to 65% in treated patients at 13 weeks compared to baseline, as measured by MRI-PDFF.

In December 2020, we initiated a paired-biopsy, open-label cohort as part of the Phase 1b/2a trial assessing histology endpoints, with data anticipated by the end of 2021. This cohort is expected to enroll approximately 20 patients with biopsy-confirmed NASH who will be treated for 20 weeks with 27 mg of BIO89-100 once weekly. The cohort will build on the recent data from 89bio’s Phase 1b/2a trial and will provide an early opportunity to demonstrate BIO89-100’s benefits on histology endpoints.

Given the potential of FGF21 to meaningfully reduce triglycerides and provide other metabolic benefits, and the established regulatory path for approval, we are developing BIO89-100 for the treatment of SHTG. We initiated our Phase 2 trial (ENTRIGUE) in SHTG patients in the third quarter of 2020 and expect to enroll approximately 90 patients, who could be on stable background medications. ENTRIGUE is a Phase 2 multi-center, randomized, double-blind, placebo-controlled study designed to evaluate safety, efficacy and tolerability in patients who will receive BIO89-100 administered weekly (9 mg, 18 mg or 27 mg) or every two weeks (36 mg) or placebo. The primary endpoint is the reduction in fasting triglycerides from baseline. Key secondary endpoints include other lipid and metabolic markers and change in liver fat measured by MRI-PDFF. Topline data from ENTRIGUE are expected in the second half of 2021. We have recently expanded ENTRIGUE with an additional cohort of patients on fibrates to assess the benefit of 27 mg weekly BIO89-100 when added to background fibrates. In this cohort, a total of 36 patients will be randomized to either receive BIO89-100 or placebo. The primary endpoint and key secondary endpoint are the same as in ENTRIGUE. We also expect to initiate registrational trials in SHTG in 2022, pending positive data from ENTRIGUE.

Impact of COVID-19 Pandemic

The ongoing COVID-19 pandemic has disrupted and may continue to disrupt our business and delay our preclinical and clinical programs and timelines. The extent to which the COVID-19 pandemic may impact our future operating results and financial condition is uncertain. We initiated our Phase 2 trial (ENTRIGUE) in SHTG patients in the third quarter of 2020 as well as a new paired-biopsy open-label histology cohort as part of the Phase 1b/2a trial in the fourth quarter of 2020. The COVID-19 surge observed late in the fourth quarter of 2020 and the first quarter of 2021 has impacted enrollment in these studies. We plan to initiate a Phase 2b trial in NASH patients in the first half of 2021. We do not yet know the full extent of potential delays, which could prevent or delay us from obtaining approval for BIO89-100. For more information regarding risks related to the ongoing COVID-19 pandemic, please see the risk factor entitled “The ongoing COVID-19 pandemic has resulted and may in the future result in significant disruptions to our clinical trials or other business operations, which could have a material adverse effect on our business,” in Part I. Item 1A of this Annual Report on Form 10-K. To the extent the ongoing COVID-19 pandemic adversely affects our business and financial results, it may also have the effect of heightening many of the other risks set forth under “Risk Factors” in this Annual Report on Form 10-K.

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Strategy

Our goal is to become a leading biopharmaceutical company focused on the development and commercialization of innovative therapies for the treatment of liver and cardio-metabolic diseases. The key components of our strategy are to:

| • | Rapidly advance BIO89-100 through clinical development for the treatment of NASH. We believe BIO89-100 may be a differentiated FGF21 therapy based on its robust and durable biological effects, a favorable tolerability profile and its potential for every two-week dosing. Following positive results in September 2020 from our Phase 1b/2a trial in NASH patients we plan to initiate a Phase 2b trial in NASH patients with F2 and F3 fibrosis in the first half of 2021. Additionally, we recently initiated a paired-biopsy, open-label histology cohort in NASH patients and are also evaluating the opportunity to test BIO89-100 in NASH patients with cirrhosis while we analyze and await data in cirrhotic patients from other FGF21 analogs.

| • | Pursue SHTG as a second indication with BIO89-100 given its unique profile and its potential for a quicker path to market. While we are focused on becoming a leader in the treatment of NASH, BIO89-100’s mechanism of action supports its potential to become the treatment leader in other cardio-metabolic and liver diseases. In the third quarter of 2020, we initiated our Phase 2 trial (ENTRIGUE) in SHTG. Based on U.S. Food and Drug Administration (“FDA”) guidance for the development of SHTG treatments, as well as the regulatory path followed by other companies that have successfully developed SHTG therapies, we believe that a combination of smaller clinical trials and shorter development timelines could mean that SHTG potentially represents a quicker path to market for BIO89-100.

| • | Scale-up and optimize the manufacturing of BIO89-100. We currently use an external contract manufacturing organization (“CMO”) to manufacture BIO89-100 for our ongoing and planned clinical trials. While these trials are ongoing, we plan to work with our CMO to optimize and scale-up the manufacturing process for BIO89-100 to support the increased production that will be needed for later-stage clinical trials and commercialization, if BIO89-100 is approved.

| • | Establish a commercial infrastructure in key geographies. We have worldwide rights to BIO89-100 and intend to develop the sales infrastructure required for commercialization in the United States. We also plan to evaluate options, including strategic collaborations, for commercializing BIO89-100, if approved, in other key markets, such as Europe and China.

| • | Build a diversified multi-asset pipeline of novel therapies. We intend to employ a value-driven strategy to identify, acquire, develop and commercialize product candidates for liver and cardio-metabolic diseases. We intend to focus on product candidates that we believe have attractive profiles and address a clear unmet medical need and can advance quickly and efficiently into late-stage development.

Our Focus on Liver and Cardio-Metabolic Disease

We are focused on developing and commercializing therapeutic interventions that have a clinically meaningful impact on patients with liver and cardio-metabolic diseases. These diseases, including NASH and SHTG, represent leading global causes of morbidity and mortality. Despite a wave of public health campaigns to promote better diet and exercise habits and a range of treatment options available for many of these diseases, there is a significant unmet medical need for more effective therapies to improve patient outcomes and reduce the burden on global healthcare systems.

We are currently developing our lead product candidate, BIO89-100, a specifically engineered glycoPEGylated analog of FGF21, for the treatment of NASH and SHTG. We believe BIO89-100 is an ideal candidate for the treatment of NASH based on its ability to address the key liver pathologies in NASH, its ability to address the underlying metabolic dysregulation in NASH patients, its favorable tolerability profile, and its potential for a longer dosing interval. Multiple epidemiological studies have linked NAFLD to increased cardiovascular disease, concluding that the majority of deaths among NAFLD patients are attributable to cardiovascular disease. As a result, we believe it is important that new therapeutics options for NASH address the underlying cardiovascular and metabolic dysregulations in these patients.

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Given the potential of BIO89-100 to meaningfully reduce triglycerides, we are also developing BIO89-100 for the treatment of SHTG. BIO89-100 may have a competitive differentiation from approved therapies and other molecules in development based on its impact on improving liver fat and other metabolic markers in addition to triglyceride reduction. There is regulatory precedence for the approval of therap ies for the treatment of SHTG in the United States based on the reduction in triglycerides from baseline as the primary endpoint for full approval. Based on the regulatory path followed by other companies that have successfully developed SHTG therapies, we believe that a combination of smaller clinical trials and shorter development timelines could mean that SHTG potentially represents a quicker path to market for BIO89-100.

Disease Overview - NASH

NASH, a severe form of NAFLD, is characterized histologically by the additional presence of inflammation and hepatocellular injury such as visible ballooning and has a significantly worse prognosis, with the potential to progress to liver fibrosis, cirrhosis or HCC.

NASH represents a large and rapidly growing problem in the United States and worldwide. Diagnoses have been on the rise and are expected to increase dramatically in the next decade. The prevalence of NAFLD, which affects approximately 25% of the global population, and NASH, which develops in approximately 20% to 25% of NAFLD patients, is driven primarily by the worldwide obesity epidemic. As a result, the prevalence of NASH has increased significantly in recent decades, paralleling similar trends in the prevalence of obesity, insulin resistance and Type 2 diabetes. The prevalence of these conditions is expected to increase further in view of the unhealthy nutrition habits, such as consumption of a diet high in fructose, sucrose and saturated fats, and sedentary behavior that characterize modern lifestyle.

The number of NASH cases in the United States is projected to expand from 16.5 million in 2015 to 27 million in 2030, with similar prevalence growth expected in Europe, yet there are no approved treatments. Approximately 20% of the 16.5 million NASH cases in 2015 had F3 or F4 fibrosis, a number that is expected to increase to 7.9 million by 2030, which will be approximately 30% of the total NASH population. Similar growth trends for NASH cases are expected in Europe (12.6 million in 2016 to 18.3 million in 2030 within France, Germany, Italy, Spain and the United Kingdom) as well as China (32.6 million in 2016 to 48.3 million in 2030). Figure 1 below shows the increase in prevalence and liver-related mortality rates by fibrosis stage. The expected lifetime economic burden of all patients with NASH in the United States in 2017 was estimated at $223 billion. Diet and exercise are currently the standard of care for NAFLD and NASH, but adherence to this treatment regimen is poor and there remains a high unmet need in the treatment of NASH.

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Figure 1: Prevalence and Liver-Related Mortality Rate by Fibrosis Stage

The critical pathophysiologic mechanisms underlying the development and progression of NASH include reduced ability to handle lipids, increased insulin resistance, injury to hepatocytes and liver fibrosis in response to hepatocyte injury. NASH patients have an excessive accumulation of fat in the liver resulting primarily from a caloric intake above and beyond energy needs. A healthy liver contains less than 5% fat, but a liver in someone with NASH can contain more than 20% fat. This abnormal liver fat contributes to the progression to NASH, a liver necro-inflammatory state, that can lead to scarring, also known as fibrosis, and, for some, can progress to cirrhosis and liver failure—cirrhosis develops in approximately 20% and 45% of patients. In some cases, cirrhosis progresses to decompensated cirrhosis, which results in permanent liver damage that can lead to liver failure. In addition, it is estimated that 8% of patients with advanced fibrosis will develop HCC. NASH is a complex, multifaceted disease that doesn’t just affect the liver. Patients with NASH frequently have other significant metabolic co-morbidities such as obesity, hyperglycemia, dyslipidemia and systemic hypertension (a constellation of which is commonly referred to as metabolic syndrome) and these further contribute to the risk of cardiovascular disease.

Disease Overview - SHTG

We are also developing BIO89-100 for the treatment of SHTG. Hypertriglyceridemia (“HTG”) is characterized by elevated fasting plasma triglyceride levels higher than 200 mg/dL and SHTG is typically defined as triglyceride levels of greater than or equal to 500 mg/dL. SHTG is associated with an increased risk of NAFLD, NASH and cardiovascular diseases, as well as acute pancreatitis, accounting for up to 10% of all acute pancreatitis episodes. A recent third-party study utilizing an omega-3 fatty acid (“omega-3 FA”) demonstrated the linkage between a reduction in triglycerides and favorable cardiovascular clinical outcomes. Additionally, SHTG increases the risk of developing NAFLD, NASH and cardiovascular disease.

It is estimated that there are 4 million patients in the United States with triglyceride levels of greater than or equal to 500 mg/dL. Of these patients, it is estimated that 56% have hepatic fat and up to 72% have other dyslipidemias or Type 2 diabetes. This patient population is expected to increase due to the triple epidemic of obesity, metabolic syndrome and Type 2 diabetes. In addition, the addressable market has the potential to expand as a result of increasing awareness of the importance of treating elevated triglyceride levels, similar to the focus today of physicians on managing LDL levels, as well as due to third party commercial efforts expected to promote triglyceride reduction.

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The treatment regimen for SHTG includes dietary restrictions and lipid-lowering drug treatment such as fibrates, omega-3 fish oils and niacin. Some statins are indicated in HTG but do not have an indication for use in SHT G. Despite multiple agents approved for the treatment of SHTG, these agents have limitations that may not make them ideal for all patients. For example, fibrates have demonstrated reductions in triglycerides of up to approximately 55% at 12 weeks of treatment. However, they have also shown increases in LDL-C (up to 45%), a detrimental effect in this patient population, risk of drug-drug interactions and increases in transaminases, as well as tolerability issues including myopathy. Omega 3 fish oils have shown more modest benefits in reduction of triglycerides from baseline of approximately 25% to 45%. Some fish oils have also showed major increases in LDL-C (up to 45%). Fish oils also have a significant pill burden given the high daily doses required. In addition, these agents fail to meaningfully address the related co-morbidities of SHTG, including glycemic control, which, when left untreated, may further exacerbate the condition. In third-party studies, up to 50% of treated SHTG patients were unable to reduce their triglyceride levels to < 500 mg/dL despite using approved drugs and are considered refractory patients. These refractory patients have substantial unmet medical need and represent a significant market opportunity. D espite these limitations, the existing drugs have achieved commercial success with two third parties each generating peak sales of approximately $1 billion or greater. Given the continuing unmet need in SHTG and limitations of current treatments, there are several agents in development for the treatment of SHTG, including a fibrate, and novel drugs targeting aspects of HTG and SHTG, including ANGPTL3 and ApoC III inhibitors.

Etiology of NASH

Understanding of the pathophysiologic mechanisms that lead to NASH has evolved in recent years. Excessive caloric overload, metabolic dysregulation, cardio-metabolic co-morbidities and genetic risk factors increase the likelihood of developing NASH, with a multitude of potential mechanistic contributors to pathophysiology. In NASH, the liver’s capacity to handle the primary metabolic energy substrates, carbohydrates and fatty acids, is overwhelmed. This occurs when there is an excess of free fatty acids deposited in the liver or their disposal from the liver is impaired. The accumulation of surplus free fatty acids leads to the formation of toxic lipid species. These toxic lipids then induce endoplasmic reticulum stress, oxidative stress and an inflammatory response, which can result in hepatocellular injury and death. This may lead to fibrosis and genomic instability, which may worsen over time to cirrhosis and HCC, respectively.

The critical pathophysiologic mechanisms underlying development and progression of NASH include (1) reduced ability to handle lipids, (2) increased insulin resistance, (3) injury to hepatocytes and (4) development and progression of liver fibrosis in response to hepatocyte injury.

Reduced Ability to Handle Lipids

Excess consumption of calories, poor diet and a sedentary lifestyle, each often associated with obesity, can burden the body with a surplus of carbohydrates and lipids. This burden can be progressively more difficult for the liver to handle thereby resulting in steatosis in the liver. The problem is compounded further as insulin resistance develops.

Free fatty acids (“FFA”) accumulate in the liver primarily from three sources, namely, through (1) the transfer from peripheral adipose tissues where triglycerides are mobilized, (2) de-novo lipogenesis (“DNL”), and (3) direct dietary intake. The FFA that lead to NASH are believed to arise primarily from the peripheral tissue pool and secondarily through DNL. The increase in the influx of FFA to the liver from the peripheral tissues is driven by excessive caloric intake greater than the body’s demand and increased insulin resistance resulting in deposition of fat to the liver for processing. DNL is a distinct process in the liver by which hepatocytes convert excess carbohydrates, especially fructose, to fatty acids.

The three main fates of fatty acids in the liver are (1) mitochondrial beta-oxidation (to release ATP, or energy), (2) re-esterification to form triglyceride, which can then be exported into the blood as very low density lipoproteins, or (3) stored in lipid droplets, resulting in liver steatosis and ultimately NASH. Adiponectin, a hormone derived from adipose tissue, appears to have a pivotal role in improving fatty acid oxidation and decreasing fatty acid synthesis, components of lipid handling.

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An increase in cholesterol accumulation in the liver can also contribute to NASH, though its role is not as clearly defined as in the case of triglycerides. The dysregulation of the cholesterol pathway can result in an increase in the cholesterol levels in the liver. The increased cholesterol can accumulate in the liver cell membranes and activate Kupffer cells (activated stellate macrophages), thereby triggering inflammatory pathways and resulting in the progression of NASH.

Increased Insulin Resistance

Insulin resistance, which typically develops in obese individuals, is considered to be a fundamental underlying mechanism in the majority of NASH patients. Fatty acids are primarily delivered to the liver from blood following lipolysis of triglycerides in adipose tissue, a process that is regulated by the actions of insulin on adipocytes. Insulin resistance in adipose tissue manifests as dysregulated lipolysis resulting in excessive delivery of FFA to the liver. The liver tries to cope with the large influx of FFA; however, the build-up of metabolic intermediates interferes with signaling, resulting in hepatic insulin resistance and the inability of the liver to process this excess FFA influx. The state of hepatic insulin resistance further exacerbates the problem by triggering DNL and the build-up of excess fat in the liver.

Injury to Hepatocytes

When the disposal of fatty acids through beta-oxidation or the formation of triglycerides is chronically overwhelmed, fatty acids can form lipotoxic species that lead to stress on the endoplasmic reticulum, oxidative stress and inflammation, all of which are pivotal processes in the development of NASH. Liver inflammation may be an important link between the initial metabolic stress and subsequent hepatocyte death and stimulation of fibrogenesis in NASH by promotion of the expression of pro-inflammatory cytokines and of apoptosis (cell death). These processes are core to the steatohepatitis that gives NASH its name. For example, hepatocyte apoptosis results in the ballooning of cells, a classic pathological feature of NASH. While hepatocytes are the primary and major target of toxic lipids, other cells such as Kupffer cells and hepatic stellate cells are also affected by lipotoxicity and contribute to the development of NASH pathology.

Additional factors, including dysregulation of cytokines and adipokines, energy depletion, anti-oxidant deficiencies, products of the gut microbiome and iron load may modulate hepatocyte vulnerability to the development of lipotoxic stress, injury and inflammation.

Development and Progression of Liver Fibrosis in Response to Hepatocyte Injury

Signaling from stressed or injured hepatocytes and Kupffer cells leads to activation of quiescent hepatic stellate cells. Upon activation, hepatic stellate cells release collagen and other factors. When the production of collagen and matrix proteins is faster than their degradation, accumulation of these proteins in the extracellular matrix can lead to progressive fibrosis. As the lipotoxicity and inflammation continue to damage the liver, the hepatic stellate cells continue to be activated resulting in greater collagen deposition that ultimately leads to fibrosis and cirrhosis.

Co-morbidities Associated with NASH

Patients with NASH frequently have other significant co-morbidities—hypertriglyceridemia, obesity, hyperlipidemia/dyslipidemia, hyperglycemia (including Type 2 diabetes) and systemic hypertension, a constellation of which is commonly referred to as metabolic syndrome—which also increase the risk of developing cardiovascular disease. Figure 2 below shows certain co-morbidities associated with NASH.

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Figure 2: NASH Co-morbidities

Selected Co-morbidities | Prevalence in NASH Population
Hypertriglyceridemia | 83%
Obesity | 82%
Hyperlipidemia / Dyslipidemia | 72%
Metabolic syndrome | 71%
Type 2 diabetes | 44%

In addition, NASH was found to independently increase the risk of non-liver-related adverse outcomes, including cardiovascular risk and malignancy. Multiple epidemiological studies have linked NASH to increased cardiovascular morbidity, concluding that the majority of deaths among NASH patients are attributable to cardiovascular disease (cardiovascular death is four times higher than death related to liver disease).

In considering therapeutic options to treat NASH, we believe it is important to address the underlying metabolic co-morbidities in addition to the liver pathology.

Diagnosis

Most people with NASH are asymptomatic and their disease is often discovered incidentally following a liver imaging procedure, such as an ultrasound, prescribed for other reasons or as part of an investigation for elevated liver enzymes. Once suspected clinically, a liver biopsy is required to definitively diagnose NASH, which necessitates the joint presence of steatosis, ballooning and lobular inflammation. Once pathologically confirmed, the severity of NAFLD and NASH is determined using the histologically validated NAS, which grades disease activity on a scale of 0 to 8. The NAS is the sum of the individual scores for steatosis (0 to 3), lobular inflammation (0 to 3), and hepatocellular ballooning (0 to 2) but does not include a score for fibrosis. Fibrosis staging (F0-F4) relies on the Kleiner classification (F0 = no fibrosis; F1 = perisinusoidal or periportal fibrosis (not both); F2 = both perisinusoidal and periportal fibrosis; F3 = bridging fibrosis; F4 = cirrhosis).

Histological diagnosis remains the gold standard for assessment of NASH and fibrosis. However, given that liver biopsy is associated with risks of pain, bleeding and other morbidity, as well as significant cost, the procedure is not practical for general patient screening. Several non-invasive tools such as clinical risk scores and imaging techniques are increasingly used to assess NASH patients. Clinical risk scores such as the NAFLD fibrosis score, Fibrosis-4 index, the Enhanced Liver Fibrosis score and vibration-controlled transient elastography (“VCTE”), have been validated and are increasingly used. These tools have an excellent negative predictive value and an acceptable positive predictive value for detection of advanced (≥ F3) fibrosis and are increasingly used in clinical settings. Additionally, evidence is emerging that shows a correlation between reduction in steatosis as measured by MRI-PDFF and improvement in histological changes in the liver. Extensive efforts are also under way to develop non-invasive means to identify patients with NAS ≥ 4 or fibrosis ≥ F2 patients without a need for a liver biopsy. In draft guidance, the FDA encouraged sponsors to identify biochemical or noninvasive imaging biomarkers that, once characterized and agreed by the FDA, could replace liver biopsies for patient selection and efficacy assessment in clinical trials.

We expect that the validation and subsequent adoption of these new tools will result in an increase in the diagnosis and treatment rates for NASH in the future.

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FGF21 Overview

Fibroblast growth factors (“FGFs”), including FGF21 and FGF19, are a large family of cell-signaling proteins involved in the regulation of many processes within the body. FGF21 is an endogenous metabolic hormone that regulates energy homeostasis, glucose-lipid-protein metabolism and insulin sensitivity, and modulates the pathways that mitigate against intracellular stress. FGF21 is secreted primarily by the liver but is also secreted by the white adipose tissue (“WAT”), skeletal muscle and the pancreas. FGF21 exerts its biological benefits through the activation of three fibroblast growth factor receptors (“FGFRs”), FGFR1c, FGFR2c and FGFR3c, and requires co-activation of the transmembrane protein cofactor beta Klotho (“ß-Klotho”). FGF21 is not believed to activate FGFR4, which has been associated with adverse effects. FGF21 can act directly or indirectly on target organs by mediating downstream regulators, such as adiponectin, and upstream regulators that induce FGF21, such as nutritional stress or transcription factors.

Biological Effects of FGF21:

Reducing Liver Steatosis by Improving Lipid Handling and Insulin Sensitivity

FGF21 has been clinically shown to reduce liver steatosis. FGF21 reduces liver steatosis by (1) increasing fatty acid oxidation in the liver, (2) reducing the deposition of free fatty acids from peripheral tissue to the liver and (3) reducing DNL in the liver. FGF21 exerts its systemic effects by reducing the serum levels of lipids (e.g., triglycerides, LDL cholesterol) and increasing insulin sensitivity. Increasing insulin sensitivity reduces lipolysis and can also reduce serum levels of lipids. In particular, FGF21 has been demonstrated to reduce liver fat in patients with NASH in multiple clinical trials.

Improving Liver Inflammation and Fibrosis

FGF21 is also believed to reduce liver fibrosis, the pathological change mostly clearly linked to liver-related morbidity in NASH patients via two potential pathways. One pathway is through the metabolic benefits of FGF21 described above. Long-term improvements in metabolic regulation reduce the ongoing liver injury that drives fibrosis and thus allows the liver time to heal. The other pathway is a direct anti-fibrotic effect mediated via adiponectin, an adipokine that is upregulated by FGF21. Increased adiponectin downregulates the hepatic stellate cells that are activated upon hepatic injury and responsible for collagen deposition and subsequent fibrosis. FGF21 demonstrated an improvement in liver fibrosis in patients in NASH in a clinical trial.

FGF21 Signaling

As noted above, FGF21 exerts its biological benefits through the co-activation of FGFRs and ß-Klotho. FGFRs are expressed widely throughout the body whereas ß-Klotho is primarily expressed in metabolic tissues such as adipose tissue, liver, and pancreas, thereby providing organ specificity to FGF21.The binding of FGF21 is a two-step process. The C-terminus of FGF21 initially binds to ß-Klotho enabling the N-terminus to form an expanded complex with one of the FGFRs. Once the co-receptor complex has formed with ß-Klotho and one of the FGFRs, a series of intracellular signaling cascades is initiated. These signaling cascades enable FGF21 to exert its biological functions.

FGF21 activates three specific FGFRs (FGFR1c, FGFR2c and FGFR3c), which based on nonclinical studies and clinical trials, appear to be responsible for mediating the desired therapeutic actions of FGF21 in NASH. FGF21 is not believed to activate FGFR4. Activation of FGFR4 results in an increase in LDL cholesterol and has been implicated in the etiology or progression of HCC.

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BIO89-100

Overview

We are developing BIO89-100, a specifically engineered glycoPEGylated analog of FGF21, for the treatment of NASH and SHTG. BIO89-100 has been specifically engineered to retain the activity of native FGF21 while extending its half-life. Specifically, it has been engineered to: (1) protect against proteolysis and reduce renal clearance, (2) have an extended half-life, (3) minimize susceptibility to aggregate in solution and (4) optimize its potency, enabling the potential use of lower dosage/doses. Additionally, we believe that BIO89-100 may enhance binding affinity for ß-Klotho, by altering the conformation of the C-terminus which could have a positive impact on efficacy.

Primary Structure and Protein Engineering of BIO89-100

BIO89-100 has been optimally constructed with two mutations via substitutions with natural amino acids at site-specific positions (173 and 176) toward the C-terminus end of the hormone. The mutations were incorporated into the FGF21 sequence after existing proline to create a consensus sequence for glycosylation. Subsequently, the glycosyl linker and a single 20 kDa glycoPEG moiety were enzymatically introduced at the O-linked glycosylation consensus site (position 173) via the proprietary glycoPEGylation technology. Our glycoPEG moiety is an activated form of the PEG molecule with the use of Sialic Acid, CMP-SA-PEG. The proximity of the mutations ensures consistent and efficient attachment of the glycoPEG moiety.

BIO89-100 has two modified natural amino acid residues:

| • | S173T: Serine modified to Threonine at position 173; and

| • | R176A: Arginine modified to Alanine at position 176.

In addition, a Methionine residue was introduced at the N-terminus which acts as the translation initiation signal. Figure 3 below shows the structure of BIO89-100.

Figure 3: Structure of BIO89-100

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The increase in the size of the molecule from 19.4 kDa to 40 kDa together with the site-specific mutations adjacent to the primary cleavage site of FGF21 (by the FAP enzyme between positions 171 and 172 on the native amino acid chain, which would be represented by positions 172 and 173 in our molecule starting with Methionine in position 1) are designed to prolong the half-life of the molecule. Additionally, we believe that the use of glycoPEGylation technology produces a comparatively stronger and more flexible structure, which aids in the development of a stable formulation. PEGylation technology has been used successfully in many pharmaceutical products including products that have been marketed for more than 10 years.

BIO89-100 uses a proprietary glycoPEGylation technology that has been previously validated by a third party, as this technology is incorporated in another pharmaceutical product (Lonquex® by Teva) that has received regulatory approval and is currently commercialized in the European Union.

The Development and Selection of BIO89-100

The discovery program that led to the selection of BIO89-100 was directed towards achieving an optimal pharmacokinetic (“PK”) and efficacy profile. It has been shown that the in vivo half-life of FGF21 can be extended by covalently linking a single glycoPEG moiety to the molecule. We performed extensive screening of FGF21 analogs with mutations at different positions including close to the N-terminus, as well as different glycoPEGylations to select an optimized molecule based on its potency, PK and in-vivo efficacy.

Stage I—Optimizing Selection of Mutation Sites—In Vitro Potency Testing

Mutations were inserted at different sites for both non-PEGylated FGF21 analogs and corresponding glycoPEGylated analogs and screened in a cell-based potency assay to select analogs that did not lose potency relative to the native hormone. Amongst the multiple glycoPEGylated analogs tested, only mutations at sites towards either N-terminus or C-terminus showed potency comparable to that of native FGF21 hormone and were selected for further development.

Stage II—Optimizing for glycoPEG (20 kDa vs 30 kDa)—In Vitro Potency Testing

Analogs selected in Stage I were prepared with either a 20 kDa or a 30 kDa glycoPEG moiety and tested for potency in mouse adipocytes (3T3-L1) and human embryonic kidney (HEK-293) cell lines. Minimal differences in potencies were observed between the 20 kDa and 30 kDa glycoPEGylated analogs. However, only the glycoPEGylated analogs that had mutations and a glycoPEG attachment at the C-terminus, as distinct from those with mutations at the N-terminus, maintained their potency in both mouse and human cell lines. These analogs were selected for future development.

Stage III—Optimizing for PK Properties and Efficacy—In Vivo Testing

Selected analogs from Stage II with either a 20 kDa or a 30 kDa glycoPEG moiety, were chosen for in vivo testing in a diabetic mouse model. In addition to PK, changes from baseline in glucose, triglycerides and insulin were measured. The data showed that the circulating half-life of the glycoPEGylated analogs for both glycoPEG sizes was extended (range 15 to 30 hours) as compared to native FGF21 (2 hours). As expected, all analogs were observed to cause a reduction in blood glucose levels. However, the 20 kDa glycoPEGylated analogs were observed to outperform the 30 kDa analogs by improving triglycerides at lower doses and across broader dose ranges. BIO89-100 resulted in the greatest reduction of insulin and was selected as the candidate for clinical development.

In summary, the mutations made to the native FGF21 molecule and the addition of the 20 kDA glycoPEG moiety via the use of the glycoPEGylation technology were observed to significantly improve the PK properties of the molecule while retaining the therapeutic benefits. We believe that BIO89-100 is a well-balanced molecule with a unique profile, which has the potential to have therapeutic benefits in NASH and cardio-metabolic diseases. Figure 4 below sets forth what we believe are the key features and potential benefits of BIO89-100:

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Figure 4: Summary of BIO89-100 Attributes and Benefits

Features | Description | Potential Benefit
Use of PEG (via glycoPEGylation) | ▪ Increases protein size and hydrodynamic volume that reduces renal filtration ▪ Prevents degradation by endocytosis and proteolytic enzymes | ▪ Prolongs half-life
▪ Protects antigenic sites present on the protein surface (i.e. antigenic epitopes) | ▪ Reduces immunogenicity
▪ Steric repulsion between the PEGylated surfaces increases water solubility and reduces aggregates | ▪ Results in more stable formulation
Site-Specific Mutations | ▪ Mutation at position 173 is immediately adjacent to the primary cleavage (FAP enzyme) site of FGF21 | ▪ Prolongs half-life
GlycoPEGylation Technology | ▪ Allows site specific linkage (glycoPEG moiety to position 173) ▪ Proximity of the glycoPEG moiety to the C-terminus induces conformational changes to the molecule | ▪ Retains potency against receptor to improve efficacy
▪ Provides a strong and flexible glycosyl bond that helps the glycoPEG moiety remain intact, further reducing degradation | ▪ Further enhances half-life

Therapeutic Potential of BIO89-100 Supported by Preclinical Animal Models of NASH, Diabetes and Obesity

BIO89-100 was evaluated in multiple distinct animal models of NASH, diabetes and obesity, including non-human primate studies. In each of these studies, consistent and significant beneficial effects were observed across a range of endpoints, specifically, robust improvements in lipid handling, glycemic control and insulin resistance as well as significant improvements in hepatic steatosis, injury and fibrosis. We believe these results demonstrate the potential of BIO89-100 to simultaneously address the multiple drivers of NASH pathogenesis. The histological endpoints, NAS and fibrosis score, mirror the endpoints we expect to assess in our clinical development. In addition, treatment with BIO89-100 in animal models was observed to result in consistent reductions in body weight.

BIO89-100 has been evaluated in three animal models of direct relevance to NASH. These included: (1) Stelic Animal Model (“STAM”), (2) Diet-induced NASH (“DIN”) model and (3) spontaneous diabetic obese cynomolgus monkey model. Additional studies done in diabetes mouse model and diet induced obesity mouse model showed benefits in key markers of relevance in NASH.

A wide range of doses were tested in these studies as well as weekly and once every two-week dosing regimen was tested in a cynomolgus monkey study. The key outcomes of these studies are summarized in Figure 5 below.

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Figure 5: Summary of NASH Pharmacology Studies

Preclinical pharmacology study with BIO89-100 | Improved Insulin Sensitivity | Improved Triglycerides and Cholesterol | Reduced Hepatocyte Injury | Reduced Liver Steatosis, Inflammation & Fibrosis | Body Weight Reduction
DIN mouse model I (10 weeks) | ✓ | ✓ | ✓ | ✓ | ✓
DIN mouse model II (19 weeks) | ✓ | ✓ | ✓ | ✓ | ✓
Diabetic obese cynomolgus monkey study 1 (8 weeks; weekly dosing) | ✓ | ✓ | ✓ | Not evaluated | ✓
Diabetic obese cynomolgus monkey study 2 (4 weeks; QW or Q2W dosing) | ✓ | ✓ | ✓ | Not evaluated | ✓

Legend:

| ✓ | Statistically significant benefit observed.

| * | Improvement observed, but did not achieve statistical significance.

BIO89-100 Clinical Development in NASH

Phase 1a Clinical Trial of Single Dose of BIO89-100 in Healthy Volunteers

We conducted a Phase 1a clinical trial to evaluate the safety, tolerability and PK of BIO89-100 in 58 healthy volunteers. In this randomized, double-blind, placebo-controlled, Phase 1a, first-in-human, SAD clinical trial the PK profile of BIO89-100 was generally dose-proportional or slightly more than dose-proportional with a half-life of approximately 55 to 100 hours. The observed median time of maximum serum concentration ranged from 36 to 60 hours. At single doses of 9.1 mg and higher, significant improvements were observed in key lipid parameters measured at Day 8 and Day 15 after dosing on Day 1. The mean changes versus baseline include significant reductions in triglycerides (up to 51%) and LDL-C (up to 37%) and increase in HDL-C (up to 36%) despite the baseline values being in the normal range. BIO89-100 demonstrated rapid (starting from Day 2), sustained and durable improvements on lipid parameters for two weeks or more after single dose administration. The effect on lipid parameters was generally dose-dependent. BIO89-100 was well tolerated across the dose range and there were no deaths, serious adverse events or discontinuations due to adverse events. The most commonly observed treatment-related adverse events, occurring in at least two subjects in the pooled BIO89-100 group, were injection site reactions and headache, all of which were reported as mild. No clinically meaningful trends were observed in gastrointestinal events, laboratories or vital signs including blood pressure or heart rate changes.

Phase 1b/2a Proof of Concept Clinical Trial in NASH Patients

In September 2020, we presented positive topline results from our Phase 1b/2a trial in NASH patients which has informed the advancement of our clinical strategy in NASH. We plan to initiate a Phase 2b trial in NASH patients in the first half of 2021.The 13-week phase 1b/2a multicenter, randomized, double-blind, placebo-controlled, multiple ascending dose-ranging trial enrolled a total of 81 patients to receive weekly (3mg/9mg/18mg/27mg) or every two-week (18mg/36mg) dosing of BIO89-100 or placebo for up to 12 weeks. Key endpoints assessed were safety, tolerability, and PK of BIO89-100 as well as change in liver fat measured by MRI-PDFF and other metabolic markers. The trial design is shown in Figure 6 below.

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Figure 6: Phase 1b/2a Trial Design

As shown in Figure 7 below, all dose groups demonstrated significant reductions in liver fat at week 13, with relative reductions up to 60% versus baseline and up to 70% versus placebo, as measured by MRI-PDFF. 43% of the patients at the highest dose achieved normal liver fat content of < 5%. A significant proportion of patients responded to therapy with up to 88% and 71% of patients achieving a ³30% or a ³50% reduction in liver fat versus baseline, respectively.

Figure 7: Relative Reduction in Liver Fat vs. Placebo at Week 13

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As shown in Figure 8 below, treatment with BIO89-100 also resulted in significant improvements in liver transaminases, with up to a 44% reduction in ALT and a 35 U/L decrease in ALT in patients with elevated baseline levels. Treatment with BIO89-100 resulted in significant reductions in triglycerides (up to 28%; p <0.05), non-HDL (up to 16%; p<0.01) and LDL-C (up to 16%; p<0.05). Triglycerides were reduced to a greater extent in patients with elevated triglycerides at baseline (TG ≥200 mg/dL), and 53% of the BIO89-100 patients in this group normalized triglyceride levels versus 0% in the placebo group. BIO89-100 also demonstrated significant increases in the insulin-sensitizing hormone adiponectin (up to 61%; p<0.001). Improvements were also noted across the spectrum of metabolic marker data vs. placebo for the 27mg QW dose group including HOMA-IR, glucose, HbA1c, weight (p<0.05) and adiponectin (p<0.001).

Figure 8: Clinically Meaningful ALT Reduction; Greater Reduction in Patients with High ALT

Baseline characteristics were similar across the sub-populations of biopsy-confirmed NASH and PNASH patients enrolled in the trial and results were also consistent across the two sub-groups. Specifically, the reductions in liver fat, percentage of responders on MRI-PDFF, and BIO89-100’s effect on reducing ALT and triglycerides were also similar across these sub-populations.

As shown in Figures 9 and 10 below, BIO89-100 was well-tolerated across all doses with no deaths or serious adverse events related to treatment and a low incidence of treatment-related adverse events (“TRAEs”) that occurred in ≥ 10% of patients. The only treatment-related adverse event that occurred in ≥10% of all BIO89-100-treated subjects was mild, increased appetite (15.9%) consistent with other investigational FGF21 analogs. Low frequency of gastrointestinal (“GI”) related adverse events was observed with a profile for BIO89-100 that was similar to placebo. Low rates of diarrhea (9.5% vs. 11.1% for placebo) and nausea (4.8% vs. 11.1% for placebo) and importantly, no vomiting were reported in BIO89-100 treated patients. No adverse effects on heart rate or blood pressure were observed.

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Figure 9: Safety Overview

Figure 10: Treatment-Related Emergent AEs in ≥ 10% of Pooled BIO89-100 Group

Paired-biopsy, Open-label Histology Cohort

In December 2020, we initiated a paired-biopsy, open-label cohort as part of the Phase 1b/2a trial assessing histology endpoints, with data anticipated by the end of 2021. This cohort is expected to enroll approximately 20 patients with biopsy-confirmed NASH who will be treated for 20 weeks with 27 mg of BIO89-100 once weekly. The cohort will build on the recent data from 89bio’s Phase 1b/2a trial and will provide an early opportunity to demonstrate BIO89-100’s benefits on histology endpoints.

BIO89-100 Clinical Development in SHTG

BIO89-100 has demonstrated significant reduction in triglyceride levels across all our preclinical and clinical studies. In diabetic obese cynomolgus monkeys with elevated triglyceride levels, BIO89-100 showed significant effects on triglycerides with a maximal reduction of 78% and 76% at doses of 1 mg/kg. In monkeys treated with baseline levels of triglycerides greater than 500mg/dL (n=4), the three monkeys treated with BIO89-100 1 mg/kg weekly had triglyceride reductions >90% at study end. In our Phase 1a clinical study, in patients with baseline triglyceride values in the normal range (mean baseline 94 mg/dL), BIO89-100 demonstrated reductions of triglycerides from baseline up to 51% at Day 8 after a single dose in healthy volunteers. In our Phase 1b/2a trial, treatment with BIO89-100 resulted in significant reductions in triglycerides (up to 28%; p <0.05). Triglycerides were reduced to a greater extent in patients with elevated triglycerides at baseline (TG ³200 mg/mL), and 53% of the BIO89-100 patients in this group normalized triglyceride levels versus 0% in the placebo group. While currently approved SHTG therapies decrease triglyceride levels, they generally do not have broader metabolic benefits.

We initiated our Phase 2 trial (ENTRIGUE) in SHTG patients in the third quarter of 2020 and expect to enroll approximately 90 patients who could be on stable background medications. In this Phase 2 multi-center, randomized, double-blind, placebo-controlled study designed to evaluate safety, efficacy and tolerability, patients will receive BIO89-100 administered weekly (9 mg, 18 mg or 27 mg) or every two weeks (36 mg) or placebo. The primary endpoint is the reduction in fasting triglycerides from baseline. Key secondary endpoints include other lipids and metabolic markers and change in liver fat measured by MRI-PDFF. Topline data from ENTRIGUE are expected in the second half of 2021. We have expanded ENTRIGUE with an additional cohort of patients on fibrates to assess the benefit of 27 mg weekly BIO89-100 when added to background fibrates. In this cohort, a total of 36 patients will be randomized to either BIO89-100 or placebo. The primary endpoint and key secondary endpoint are the same as in ENTRIGUE. We also expect to initiate registrational trials in SHTG in 2022, pending positive data from ENTRIGUE.

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There is regulatory precedence for the approval of therap ies for the treatment of SHTG in the United States based on the reduction in triglycerides from baseline as the primary endpoint for full approval. The FDA surrogate endpoint table for drug approval lists a reduction in triglycerides from baseline as the endpoint for full approval of a therapy in SHTG. A clinical outcome study was not required for certain third-party approvals in SHTG or as a post-marketing commitment. The SHTG Phase 3 trial for some of these products consisted of a single study of a 12-week duration with 75 to 100 patients per treatment group. Based on the regulatory path followed by other companies that have successfully developed SHTG therapies, we believe that a combination of smaller clinical trials and shorter development timelines could mean that SHTG potentially represents a quicker path to market for BIO89-100.

Agreements with Teva

Agreements Relating to FGF21 Program

In April 2018, we entered into an Asset Transfer and License Agreement (the “FGF21 Agreement”) with Teva Pharmaceutical Industries Ltd (“Teva”), under which we acquired certain patents, intellectual property and other assets relating to Teva’s glycoPEGylated FGF21 program. Under this agreement, Teva also granted a perpetual, non-exclusive (but exclusive as to BIO89-100), non-transferable, worldwide license to patents and know-how related to glycoPEGylation technology for use in the research, development, manufacture and commercialization of the compound BIO89-100 and products containing BIO89-100. In addition, we entered into a Sublicense Agreement with ratiopharm (the “ratiopharm Sublicense”), under which we were granted a perpetual, exclusive, worldwide sublicense to patents and know-how related to glycoPEGylation technology used in the development, manufacture and commercialization of BIO89-100 and products containing BIO89-100.

Under the FGF21 Agreement, we are obligated to use commercially reasonable efforts to develop and commercialize BIO89-100 in each of the United States and five major European countries. We have the right to sublicense all rights licensed to us by Teva under the FGF21 Agreement.

Pursuant to the FGF21 Agreement and the FASN Agreement (as defined and described below), we paid Teva a nonrefundable upfront payment of $6.0 million. In addition, under the FGF21 Agreement, we are required to make certain payments to Teva totaling $2.5 million for the achievement of certain clinical development milestones, and additional payments totaling up to $65.0 million upon achievement of certain commercial milestones. We are also obligated to pay Teva tiered royalties at percentages in the low-to-mid single-digits on worldwide net sales of products containing BIO89-100. Our royalty obligations will terminate, on a product-by-product and country-by-country basis, at the later of: (1) the date of expiration of the last to expire valid claim in the assigned patents that covers BIO89-100 in such country, (2) the expiration of data or regulatory exclusivity for BIO89-100 in such country and (3) 10 years from the first commercial sale of BIO89-100 in such country. We are not required to make any payments to ratiopharm pursuant to the ratiopharm Sublicense.

The term of the FGF21 Agreement will continue, on a product-by-product and country-by-country basis, until the royalty term with respect to BIO89-100 in such country expires. The ratiopharm Sublicense will continue until terminated in accordance with its terms. We may terminate the FGF21 Agreement and the ratiopharm Sublicense for any reason. Either party may terminate the FGF21 Agreement for cause for the other party’s uncured material breach. ratiopharm may terminate the ratiopharm Sublicense for certain material breaches by us. Either party may terminate the FGF21 Agreement or the ratiopharm Sublicense in the event of bankruptcy of the other party. Teva may terminate the FGF21 Agreement if we challenge the validity of any patent licensed to us under the FGF21 Agreement. Termination of the FGF21 Agreement or the ratiopharm Sublicense will impact our rights under the intellectual property licensed to us by Teva and ratiopharm, respectively, but will not affect our rights under the assets assigned to us.

In April 2018, we also entered into a Reagent Supply and Technology Transfer Agreement, under which Teva will supply us with certain reagents required for the glycoPEGylation process that are necessary for our development and commercialization of BIO89-100, and transfer to us certain know-how required for the production of such reagents. The term of this agreement was recently extended by mutual agreement until December 31, 2022.

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FASN Agreements

In April 2018, we entered into an Asset Transfer and License Agreement with Teva under which we acquired from Teva patents, intellectual property and other assets relating to Teva’s development program of small molecule inhibitors of FASN (the “FASN Agreement”). Under the FASN Agreement we are obligated to use commercially reasonable efforts to develop and commercialize FASN in the United States and five major European countries. We have the right to sublicense all rights licensed to us by Teva under the FASN Agreement.

Pursuant to the FASN Agreement and the FGF21 Agreement (as described above), we paid Teva a nonrefundable upfront payment of $6.0 million. In addition, under the FASN Agreement, we are required to make certain payments to Teva totaling $2.5 million for the achievement of certain clinical development milestones, and additional payments totaling up to $65.0 million upon achievement of certain commercial milestones. We are also obligated to pay Teva tiered royalties at percentages in the low-to-mid single-digits on worldwide net sales of products arising from the FASN program. Our royalty obligations will terminate, on a product-by-product and country-by-country basis, at the later of: (1) the date of expiration of the last to expire valid claim in the assigned patents that covers FASN in such country, (2) the expiration of data or regulatory exclusivity for such product arising from the FASN program in such country and (3) 10 years from the first commercial sale of a product arising from the FASN program in such country.

The term of the FASN Agreement will continue, on a product-by-product and country-by-country basis, until the royalty term with respect to the product arising from the FASN program in such country expires. We may terminate the FASN Agreement for any reason. Either party may terminate the agreement for cause for the other party’s uncured material breach, or in the event of bankruptcy of the other party.

Government Regulation and Product Approval

The FDA and other regulatory authorities at federal, state and local levels, as well as in foreign countries, extensively regulate, among other things, the research, development, testing, manufacture, quality control, import, export, safety, effectiveness, labeling, packaging, storage, distribution, record keeping, approval, advertising, promotion, marketing, post-approval monitoring and post-approval reporting of biologics, such as those we are developing. We, along with third-party contractors, will be required to navigate the various preclinical, clinical and commercial approval requirements of the governing regulatory agencies of the countries in which we wish to conduct studies or seek approval or licensure of our product candidates.

The process required by the FDA before biologic product candidates may be marketed in the United States is expensive and time-consuming. Generally, this process involves completing pre-clinical laboratory studies before the FDA will allow human clinical trials to commence. We are then required to complete human clinical trials to demonstrate that a product candidate is safe and effective. Following the completion of these clinical trials, we are required to prepare and submit a biologics license (“BLA”) application, which presents the FDA with detailed clinical and safety data, as well as manufacturing data. As part of the review of a BLA, the FDA may inspect manufacturing facilities to assure that the facilities, methods and controls are adequate to preserve the biological product’s continued safety, purity and potency, and may also inspect selected clinical investigation sites to assess compliance with current Good Clinical Practices (“cGCP”). This process takes many years from inception through filing of a BLA application and the likelihood of success is highly uncertain.

Preclinical and Clinical Development

Prior to beginning the first clinical trial with a product candidate, we must submit an investigational new drug (“IND”) application to the FDA. An IND is a request for authorization from the FDA to administer an investigational new drug product to humans. The central focus of an IND submission is the general investigational plan and the protocol(s) for clinical studies. Submission of an IND may or may not result in FDA authorization to begin a clinical trial.

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Clinical trials involve the administration of the investigational product to human subjects under the supervision of qualified investigators in accordance with cGCPs, which include the requirement that all research subjects provide their informed consent for their participation in any clinical study. Furthermore, an independent review board (“IRB”) for each site proposing to conduct the clinical trial must review and approve the plan for any clinical trial and its informed consent form before the clinical trial begins at that site, and must monitor the study until completed. Regulatory authorities, the IRB or the sponsor may suspend a clinical trial at any time on various grounds, including a finding that the subjects are being exposed to an unacceptable health risk or that the trial is unlikely to meet its stated objectives.

For purposes of BLA approval, human clinical trials are typically conducted in three sequential phases that may overlap.

| • | Phase 1—The investigational product is initially introduced into healthy human subjects or patients with the target disease or condition. These studies are designed to test the safety, dosage tolerance, absorption, metabolism and distribution of the investigational product in humans, the side effects associated with increasing doses, and, if possible, to gain early evidence on effectiveness.

| • | Phase 2—The investigational product is administered to a limited patient population with a specified disease or condition to evaluate the preliminary efficacy, optimal dosages and dosing schedule and to identify possible adverse side effects and safety risks. Multiple Phase 2 clinical trials may be conducted to obtain information prior to beginning larger and more expensive Phase 3 clinical trials.

| • | Phase 3—The investigational product is administered to an expanded patient population to further evaluate dosage, to provide statistically significant evidence of clinical efficacy and to further test for safety, generally at multiple geographically dispersed clinical trial sites. These clinical trials are intended to establish the overall risk/benefit ratio of the investigational product and to provide an adequate basis for product approval.

Concurrent with clinical trials, companies must finalize a process for manufacturing the product in commercial quantities in accordance with current good manufacturing practices (“cGMP”) requirements. The manufacturing process must be capable of consistently producing quality batches of the product candidate and, among other things, must develop methods for testing the identity, strength, quality and purity of the final product, or for biologics, the safety, purity and potency.

BLA Submission and Review

Assuming successful completion of all required testing in accordance with all applicable regulatory requirements, the results of product development, nonclinical studies and clinical trials are submitted to the FDA as part of a BLA requesting approval to market the product for one or more indications. The submission of a BLA requires payment of a substantial application user fee to FDA, unless a waiver or exemption applies.

Once a BLA has been submitted, the FDA’s goal is to review standard applications within ten months after it accepts the application for filing, or, if the application qualifies for priority review, six months after the FDA accepts the application for filing. In both standard and priority reviews, the review process is may be extended by FDA requests for additional information or clarification. The FDA reviews a BLA to determine, among other things, whether a product is safe, pure and potent and the facility in which it is manufactured, processed, packed, or held meets standards designed to assure the product’s continued safety, purity and potency. The FDA may convene an advisory committee to provide clinical insight on application review questions. Before approving a BLA, the FDA will typically inspect the facility or facilities where the product is manufactured. The FDA will not approve an application unless it determines that the manufacturing processes and facilities are in compliance with cGMP requirements and adequate to assure consistent production of the product within required specifications. Additionally, before approving a BLA, the FDA will typically inspect one or more clinical sites to assure compliance with cGCP. If the FDA determines that the application, manufacturing process or manufacturing facilities are not acceptable, it will outline the deficiencies in the submission and often will request additional testing or information. Notwithstanding the submission of any requested additional information, the FDA ultimately may decide that the application does not satisfy the regulatory criteria for approval.

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After the FDA evaluates a BLA and conducts necessary inspections, the FDA may either issue an approval letter or a Complete Response letter. An approval letter authorizes commercial marketing of the product with specific prescribing information for specific indications. A Complete Response letter will describe deficiencies that the FDA has identified in the BLA. The FDA may delay or refuse approval of a BLA if applicable regulatory criteria are not satisfied, require additional testing or information and/or require post-marketing testing and surveillance to monitor safety or efficacy of a product.

If regulatory approval of a product is granted, such approval will be granted for particular indications and may entail limitations on the indicated uses for which such product may be marketed. For example, the FDA may approve the BLA with a Risk Evaluation and Mitigation Strategy (“REMS”) to ensure the benefits of the product outweigh its risks. A REMS is a safety strategy to manage a known or potential serious risk associated with a product and to enable patients to have continued access to such medicines by managing their safe use, and could include medication guides, physician communication plans, or elements to assure safe use, such as restricted distribution methods, patient registries and other risk minimization tools. The FDA also may condition approval on, among other things, changes to proposed labeling or the development of adequate controls and specifications. Once approved, the FDA may withdraw the product approval if compliance with pre- and post-marketing requirements is not maintained or if problems occur after the product reaches the marketplace. The FDA may require, or companies may voluntarily pursue, one or more Phase 4 post-market studies and surveillance to further assess and monitor the product’s safety and effectiveness after commercialization, and may limit further marketing of the product based on the results of these post-marketing studies.

Expedited Programs for Serious Conditions

The FDA maintains several programs intended to facilitate and expedite development and review of new drugs and biologics to address unmet medical needs in the treatment of serious or life-threatening diseases or conditions. These programs include Fast Track designation, Breakthrough Therapy designation, Priority Review and Accelerated Approval. These programs can significantly reduce the time it takes for the FDA to review a BLA, but they do not guarantee that a product will receive FDA approval. Even if a product qualifies initially, the FDA may later decide that the product no longer meets the conditions for qualification or decide that the time period for FDA review will not be shortened.

Post-Approval Requirements

Any products manufactured or distributed pursuant to FDA approvals are subject to pervasive and continuing regulation by the FDA, including, among other things, requirements relating to record-keeping, reporting of adverse experiences, periodic reporting, product sampling and distribution, and advertising and promotion of the product. After approval, most changes to the approved product, such as adding new indications or other labeling claims, are subject to prior FDA review and approval. Biologic manufacturers and their subcontractors are required to register their establishments with the FDA and certain state agencies, and are subject to periodic unannounced inspections by the FDA and certain state agencies for compliance with cGMP. Changes to the manufacturing process are strictly regulated, and, depending on the significance of the change, may require prior FDA approval before being implemented. FDA regulations also require investigation and correction of any deviations from cGMP and impose reporting requirements upon companies and third-party manufacturers. Accordingly, manufacturers must continue to expend time, money and effort in the area of production and quality control to maintain compliance with cGMP and other aspects of regulatory compliance.

The FDA may withdraw approval if compliance with regulatory requirements and standards is not maintained or if problems occur after the product reaches the market. Later discovery of previously unknown problems with a product, including adverse events of unanticipated severity or frequency, or with manufacturing processes, or failure to comply with regulatory requirements, may result in revisions to the approved labeling to add new safety information; imposition of post-market studies or clinical studies to assess new safety risks; or imposition of distribution restrictions or other restrictions under a REMS program, among other potential consequences.

The FDA closely regulates the marketing, labeling, advertising and promotion of biologics. A company can make only those claims relating to safety and efficacy, purity and potency that are approved by the FDA and in accordance with the provisions of the approved label. The FDA and other agencies actively enforce the laws and regulations prohibiting the promotion of off-label uses. Failure to comply with these requirements can result in,

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among other things, adverse publicity, warning letters, corrective advertising and potential civil and criminal penalties.

Biosimilars and Reference Product Exclusivity

The Patient Protection and Affordable Care Act, as amended (collectively, the “Affordable Care Act”) includes a provision called the Biologics Price Competition and Innovation Act of 2009 (“BPCIA”), which created an abbreviated approval pathway for biological products that are biosimilar to or interchangeable with an FDA-approved reference biological product.

Biosimilarity, which requires that there be no clinically meaningful differences between the biological product and the reference product in terms of safety, purity and potency, can be shown through analytical studies, animal studies, and a clinical study or studies.

Under the BPCIA, an application for a biosimilar product may not be submitted to the FDA until four years following the date that the reference product was first licensed by the FDA. In addition, the approval of a biosimilar product may not be made effective by the FDA until 12 years from the date on which the reference product was first licensed. During this 12-year period of exclusivity, another company may still market a competing version of the reference product if the FDA approves a full BLA for the competing product containing that applicant’s own preclinical data and data from adequate and well-controlled clinical trials to demonstrate the safety, purity and potency of its product. At this juncture, it is unclear whether products deemed “interchangeable” by the FDA will, in fact, be readily substituted by pharmacies, which are governed by state pharmacy law.

The BPCIA is complex and continues to be interpreted and implemented by the FDA. In addition, recent government proposals have sought to reduce the 12-year reference product exclusivity period. Other aspects of the BPCIA, some of which may impact the BPCIA exclusivity provisions, have also been the subject of recent litigation. As a result, the ultimate impact, implementation, and impact of the BPCIA is subject to significant uncertainty.

Other U.S. Healthcare Laws and Compliance Requirements

Pharmaceutical companies are subject to additional healthcare regulation and enforcement by the federal government and by authorities in the states and foreign jurisdictions in which they conduct their business. Such laws include, without limitation: the federal Anti-Kickback Statute (“AKS”), the federal False Claims Act, HIPAA and similar foreign, federal and state fraud, abuse and transparency laws.

The federal AKS prohibits, among other things, any person or entity from knowingly and willfully offering, paying, soliciting or receiving any remuneration, to induce or in return for either the referral of an individual, or the purchase or recommendation of an item or service for which payment may be made under any federal healthcare program. The term remuneration has been interpreted broadly to include anything of value. The AKS has been interpreted to apply to arrangements between pharmaceutical manufacturers on one hand, and prescribers and purchasers on the other. Our practices may not in all cases meet all of the criteria for protection under a statutory exception or regulatory safe harbor. Failure to meet all of the requirements of a particular applicable statutory exception or regulatory safe harbor does not make the conduct per se illegal under the AKS. Instead, the legality of the arrangement will be evaluated on a case-by-case basis based on a cumulative review of all of its facts and circumstances. A person or entity does not need to have actual knowledge of the statute or specific intent to violate it in order to have committed a violation.

The federal false claims laws, including the False Claims Act (“FCA”), which imposes significant penalties and can be enforced by private citizens through civil qui tam actions, and civil monetary penalty laws prohibit any person or entity from, among other things, knowingly presenting, or causing to be presented, a false or fraudulent claim for payment of federal government funds, including federal healthcare programs, such as Medicare and Medicaid. Pharmaceutical and other healthcare companies have been prosecuted under these laws for engaging in a variety of different types of conduct that caused the submission of false claims to federal healthcare programs. Under the AKS, for example, a claim resulting from a violation of the AKS is deemed to be a false or fraudulent

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claim for purposes of the FCA. The FCA imposes mandatory treble damages and per-violation civil penalties up to approximately $23,000.

HIPAA created additional federal criminal statutes that prohibit, among other things, executing a scheme to defraud any healthcare benefit program, including private third-party payors, and making false statements relating to healthcare matters. A person or entity does not need to have actual knowledge of the healthcare fraud statute implemented under HIPAA or specific intent to violate the statute in order to have committed a violation.

Also, many states have similar, and typically more prohibitive, fraud and abuse statutes or regulations that apply to items and services reimbursed under Medicaid and other state programs, or, in several states, apply regardless of the payor.

The U.S. federal Physician Payments Sunshine Act requires certain manufacturers of drugs and biologics covered by Medicare, Medicaid or the Children’s Health Insurance Program, with specific exceptions, to annually report to CMS information related to payments or other transfers of value made to physicians and teaching hospitals, as well as ownership and investment interests held by physicians and their immediate family members. Beginning in 2022, such reporting obligations will be expanded to include payments and other transfers of value provided in 2021 to certain other healthcare professionals.

Ensuring business arrangements with third parties comply with applicable healthcare laws and regulations is a difficult and costly endeavor. If our operations are found to be in violation of any of the federal and state healthcare laws described above or any other current or future governmental regulations that apply to us, we may be subject to significant penalties, including without limitation, civil, criminal and/or administrative penalties, damages, fines, disgorgement, imprisonment, exclusion from participation in government programs, such as Medicare and Medicaid, injunctions, private “qui tam” actions brought by individual whistleblowers in the name of the government, or refusal to allow us to enter into government contracts, contractual damages, reputational harm, administrative burdens, diminished profits and future earnings, additional reporting obligations and oversight if we become subject to a corporate integrity agreement or other agreement to resolve allegations of non-compliance with these laws, and the curtailment or restructuring of our operations, any of which could adversely affect our ability to operate our business and our results of operations.

Data Privacy and Security

Numerous state, federal and foreign laws, govern the collection, dissemination, use, access to, confidentiality and security of personal information, including health-related information. In the United States, numerous federal and state laws and regulations, including state data breach notification laws, state health information privacy laws, and federal and state consumer protection laws and regulations, govern the collection, use, disclosure, and protection of health-related and other personal information could apply to our operations or the operations of our partners. Entities that are found to be in violation of HIPAA or other laws may be subject to significant civil, criminal and administrative fines and penalties and/or additional reporting and oversight obligations. Further, entities that knowingly obtain, use, or disclose certain individually identifiable health information in an improper fashion may be subject to criminal penalties.

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Coverage, Pricing and Reimbursement

Significant uncertainty exists as to the coverage and reimbursement status of any product candidates for which we may obtain regulatory approval. In the United States and in foreign markets, 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 United States, third-party payors include federal and state healthcare programs, private managed care providers, private health insurers and other organizations. Adequate coverage and reimbursement from governmental healthcare programs, such as Medicare and Medicaid in the United States, and commercial payors are critical to new product acceptance.

Decisions regarding whether to cover any of our product candidates, if approved, the extent of coverage and amount of reimbursement to be provided are made on a plan-by-plan basis. Further, no uniform policy for coverage and reimbursement exists in the United States, and coverage and reimbursement can differ significantly from payor to payor. Third-party payors often rely upon Medicare coverage policy and payment limitations in setting their own reimbursement rates, but also have their own methods and approval process apart from Medicare determinations. As a result, the coverage determination process is often a time-consuming and costly process that will require us to provide scientific and clinical support for the use of our product candidates to each payor separately, with no assurance that coverage and adequate reimbursement will be applied consistently or obtained in the first instance.

For products administered under the supervision of a physician, obtaining coverage and adequate reimbursement may be particularly difficult because of the higher prices often associated with such drugs. Additionally, separate reimbursement for the product itself or the treatment or procedure in which the product is used may not be available, which may impact physician utilization. In addition, companion diagnostic tests require coverage and reimbursement separate and apart from the coverage and reimbursement for their companion pharmaceutical or biological products. Similar challenges to obtaining coverage and reimbursement, applicable to pharmaceutical or biological products, will apply to companion diagnostics.

In addition, the U.S. government, state legislatures and foreign governments have continued implementing cost-containment programs, including price controls, restrictions on coverage and reimbursement and requirements for substitution of generic products. Third-party payors are increasingly challenging the prices charged for medical products and services, examining the medical necessity and reviewing the cost effectiveness of pharmaceutical or biological products, medical devices and medical services, in addition to questioning safety and efficacy. Adoption of price controls and cost-containment measures, and adoption of more restrictive policies in jurisdictions with existing controls and measures, could further limit sales of any product that receives approval. Decreases in third-party reimbursement for any product or a decision by a third-party not to cover a product could reduce physician usage and patient demand for the product.

Healthcare Reform

In the United States and some foreign jurisdictions, there have been, and continue to be, several legislative and regulatory changes and proposed changes regarding the healthcare system that could prevent or delay marketing approval of product candidates, restrict or regulate post-approval activities, and affect the ability to profitably sell product candidates for which marketing approval is obtained. Among policy makers and payors in the United States and elsewhere, there is significant interest in promoting changes in healthcare systems with the stated goals of containing healthcare costs, improving quality and/or expanding access. In the United States, the pharmaceutical industry has been a particular focus of these efforts and has been significantly affected by major legislative initiatives.

For example, the Affordable Care Act has substantially changed healthcare financing and delivery by both governmental and private insurers. The Affordable Care Act and its implementing regulations, among other things, revised the methodology for calculating rebates for covered outpatient drugs and certain biologics owed by manufacturers to the state and federal government under the Medicaid Drug Rebate Program, increased the minimum Medicaid rebates owed by most manufacturers under the Medicaid Drug Rebate Program, extended the Medicaid Drug Rebate program to utilization of prescriptions of individuals enrolled in Medicaid managed care organizations, subjected manufacturers to new annual fees and taxes for certain branded prescription drugs, and expanded programs designed to test innovative payment models, service delivery models, or value-based arrangements, and fund comparative effectiveness research.

There remain legal and political challenges to certain aspects of the Affordable Care Act. In December 2018, a United States District Court judge in Texas ruled that the Affordable Care Act is unconstitutional in its entirety

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because the “individual mandate” was repealed by Congress in 2017. The decision has been appealed to the United States Supreme Court. A decision is expected by spring 2021. It is unclear how such litigation and other efforts to repeal, replace or otherwise modify the Affordable Care Act will impact reimbursement of pharmaceutical and biological products.

We anticipate that the Affordable Care Act, if substantially maintained in its current form, will continue to result in additional downward pressure on coverage and the price that we receive for any approved product, and could seriously harm our business. Any reduction in reimbursement from Medicare and 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 products. Such reforms could have an adverse effect on anticipated revenue from product candidates that we may successfully develop and for which we may obtain regulatory approval and may affect our overall financial condition and ability to develop product candidates.

In addition, further legislation or regulation could be passed that could harm our business, financial condition and results of operations. Other legislative changes have been proposed and adopted since the Affordable Care Act was enacted.

There has been increasing legislative and enforcement interest in the United States with respect to specialty drug pricing practices. Specifically, there have been several recent U.S. Congressional inquiries and proposed federal legislation designed to, among other things, bring more transparency to drug pricing, reduce the cost of prescription drugs under Medicare, review the relationship between pricing and manufacturer patient programs, and reform government program reimbursement methodologies for drugs. In October 2020, the FDA issued guidance describing procedures for manufacturers to facilitate the importation of FDA-approved biologics manufactured abroad and originally intended for sale in a foreign country into the United States. Previously, the Trump administration released a “Blueprint,” or plan, to lower drug prices and reduce out of pocket costs of drugs that contained proposals to increase drug manufacturer competition, increase the negotiating power of certain federal healthcare programs, incentivize manufacturers to lower the list price of their products, and reduce the out of pocket costs of drug products paid by consumers.

Although the Biden administration has stayed the effective dates of some last-minute drug price regulations issued by the Trump administration, Congress and the Biden administration have each indicated that it will continue to seek new legislative and/or administrative measures to control drug costs.

Additional Regulation

In addition to the foregoing, local, state and federal laws, including in the United States and Israel, regarding such matters as safe working conditions, manufacturing practices, environmental protection, fire hazard control 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 or biohazardous substances, we could be liable for damages, environmental remediation, and/or governmental fines. We believe that we are in material compliance with applicable environmental laws and occupational health and safety laws 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. We may incur significant costs to comply with such laws and regulations now or in the future.

Competition

The biopharmaceutical industry is intensely competitive and subject to rapid innovation and significant technological advancements. We believe the key competitive factors that will affect the development and commercial success of BIO89-100 and any future product candidates are efficacy, safety and tolerability profile, reliability, convenience of dosing, price, the level of generic competition and reimbursement. Our competitors include multinational pharmaceutical companies, specialized biotechnology companies, universities and other research institutions. A number of biotechnology and pharmaceutical companies are pursuing the development or

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marketing of pharmaceuticals that target the same diseases that we are targeting. Smaller or earlier-stage companies may also prove to be significant competitors, particularly through collaborative arrangements with large, established companies. Given the high incidence of NASH, it is likely that the number of companies seeking to develop products and therapies for the treatment of liver and cardio-metabolic diseases, such as NASH, will increase.

If BIO89-100 is approved for the treatment of NASH, future competition could also arise from products currently in development, including: GS-0976, an ACC inhibitor, and GS-9674, an FXR agonist, from Gilead Sciences, Inc.; PF-05221304, an ACC inhibitor, and PF-06835919, a KHK inhibitor, from Pfizer Inc.; Ocaliva, an FXR agonist from Intercept Pharmaceuticals, Inc.; Resmetirom, a beta-thyroid hormone receptor agonist from Madrigal Pharmaceuticals, Inc.; VK2809, a beta-thyroid hormone receptor agonist from Viking Therapeutics, Inc.; Aldafermin, an FGF19 analog from NGM Biopharmaceuticals, Inc.; MK-3655, an FGFR1c/KLB agonist antibody from Merck & Co., Inc.; Pegbelfermin, a PEGylated FGF21 analog from Bristol-Myers Squibb Company; Efruxifermin, a FGF21 fusion protein from Akero Therapeutics, Inc.; Elobixibat, an IBAT-inhibitor from Albireo Pharma, Inc.; a Galectin-3 inhibitor from Galectin Therapeutics Inc.; a synthetic conjugate of cholic acid and arachidic acid from Galmed Pharmaceuticals Ltd.; MET409/MET642, FXR agonists from Metacrine, Inc, Novartis AG and Terns Pharmaceuticals; Semaglutide, a GLP-1 receptor agonist from Novo Nordisk A/S; ALT-801, a dual GLP-1/glucagon agonist from Altimmune; Tirzepatide, a dual GIP/GLP-1 receptor agonist from Eli Lilly and Company; and Lanifibranor, a PPAR alpha/delta/gamma agonist from Iventiva;

If BIO89-100 is approved for the treatment of SHTG, we would face competition from currently approved and marketed products, including statins, fibrates, Vascepa, and Lovaza, as well as generic products. Further competition could arise from products currently in development, including: AKCEA-APOCIII-LRx, an ApoC III inhibitor from Ionis; Vupanorsen/AKCEA-ANGPTL3, an anti-ANGPTL3 from Pfizer; Evinacumab, an Anti-ANGPTL3 from Regeneron Pharmaceuticals, Inc.; Pemafibrate, a PPAR alpha agonist from Kowa Research Institute, Inc.; and ARO-APOC3, an ApoC III inhibitor and ARO-ANG3, an anti-ANGPTL3 from Arrowhead Pharmaceuticals, Inc.

Many of our competitors have substantially greater financial, technical, human and other resources than we do and may be better equipped to develop, manufacture and market technologically superior products. In addition, many of these competitors have significantly longer operating histories and greater experience than we have in undertaking nonclinical studies and human clinical trials of new pharmaceutical products and in obtaining regulatory approvals of human therapeutic products. Many of our competitors have established distribution channels for the commercialization of their products, whereas we have no such channel or capabilities. In addition, many competitors have greater name recognition and more extensive collaborative relationships. As a result, our competitors may obtain regulatory approval of their products more rapidly than we do or may obtain patent protection or other intellectual property rights that limit our ability to develop or commercialize our product candidate or any future product candidates. Our competitors may also develop and succeed in obtaining approval for drugs that are more effective, more convenient, more widely used and less costly or have a better safety profile than our products and these competitors may also be more successful than we are in manufacturing and marketing their products. If we are unable to compete effectively against these companies, then we may not be able to commercialize our product candidate or any future product candidates or achieve a competitive position in the market. This would adversely affect our ability to generate revenue. Our competitors also compete with us in recruiting and retaining qualified scientific, management and commercial personnel, establishing clinical trial sites and enrolling patients for clinical trials, as well as in acquiring technologies complementary to, or necessary for, our programs.

Manufacturing and Supply

We do not own or operate manufacturing facilities for the production of BIO89-100, nor do we have plans to develop our own manufacturing operations in the foreseeable future. We currently rely, and expect to continue to rely, on third parties for the manufacturing of our product candidates for preclinical and clinical testing, as well as for commercial manufacturing if BIO89-100 or any future product candidate receives marketing approval.

BIO89-100 drug substance is manufactured by fermentation of a recombinant strain of the bacterium E. coli. Product accumulates as insoluble particles (inclusion bodies) within the cells and is recovered by cell disruption, followed by solubilization of the inclusion bodies, protein refolding and purification with two chromatographic separation columns. Purified material is glycoPEGylated in a 2-step enzymatic reaction where a 20kDa linear glycoPEG moiety is attached to the protein through GalNAc and Sialic Acid linkers.

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GlycoPEGylated protein is purified with two chromatographic columns to yield product with target quality attributes. Purified glycoPEGylated protein is concentrated and then formulated to a target concentration with formulation buffer as drug product.

Northway Biotechpharma (“BTPH”) is our sole source supplier for BIO89-100. Any reduction or halt in supply of drug product from BTPH could limit our ability to develop BIO89-100 until a replacement contract manufacturer is found and qualified. We currently have material available to support our ongoing clinical trials for the treatment of NASH and SHTG.

We are working with BTPH on process optimization to support large-scale production for future trials and commercialization. In parallel, we have entered into a contract with a formulation development company to explore the potential for a new refrigerated liquid formulation and/or a freeze-dried, or lyophilized product.

BTPH Agreement

In May 2018, we entered into a master services agreement with BTPH, under which BTPH agreed to provide us certain services, including development, manufacturing, and storing of BIO89-100, under statements of work for such services to be agreed by the parties from time to time. The master services agreement will continue for the duration of time that BTPH is providing services to us, unless earlier terminated by either party upon its terms. We may terminate the agreement at any time after a specified notice period and subject to the payment of certain agreed upon fees where such termination results in cancellation of manufacturing scheduled within a certain period. In addition, either party may terminate the agreement for cause for the other party’s uncured material breach, in the event of bankruptcy of the other party, in the event of the commission of fraud by the other party or in the event of a force majeure.

Sales and Marketing

We currently have no marketing, sales or distribution capabilities. In order to commercialize any products that are approved for commercial sale, we must either develop a sales and marketing infrastructure or collaborate with third parties that have sales and marketing experience.

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We may elect to establish our own sales force to market and sell a product for which we obtain regulatory approval if we expect that the geographic market for a product we develop on our own is limited or that the prescriptions for the product will be written principally by a relatively small number of physicians. If we decide to market and sell any products ourselves, we do not expect to establish direct sales capability until shortly before the products are approved for commercial sale.

We plan to seek third-party support from established pharmaceutical and biotechnology companies for those products that would benefit from the promotional support of a large sales and marketing force. In these cases, we might seek to promote our products in collaboration with marketing partners or rely on relationships with one or more companies with large established sales forces and distribution systems.

Intellectual Property

Our success depends in part upon our ability to protect our core technology and intellectual property. To protect our intellectual property rights, we rely on patents, trademarks, copyrights and trade secret laws, confidentiality procedures, and employee disclosure and invention assignment agreements. Our intellectual property is critical to our business and we strive to protect it through a variety of approaches, including by obtaining and maintaining patent protection in the United States and internationally for our product candidates, novel biological discoveries, new targets and applications, and other inventions that are important to our business. For our product candidates, we generally intend to pursue patent protection covering compositions of matter, methods of making and methods of use. As we continue the development of our product candidates, we plan to identify additional means of obtaining patent protection that would potentially enhance commercial success, including pursuit of claims directed to new therapeutic indications.

FGF21 Patents

Our FGF21 patent portfolio includes four families:

The first family is entitled “Remodeling and GlycoPEGylation of Fibroblast Growth Factor (FGF)”. This patent family provides granted patent protection in 39 countries around the globe, including the United States (U.S. Patent Number 9,200,049, expiry date: June 25, 2028; and U.S. Patent No. 10,874,714, expiry date: October 10, 2028), Canada, Europe (broadly), and Japan (latter three expire October 31, 2025) for FGF21 conjugates comprising a variety of modifying groups that can be attached at several different amino acid positions. GlycoPEGylated FGF21 is specifically claimed. The granted claims broadly protect our lead drug candidate BIO89-100 and pharmaceutical compositions thereof, as well as methods for making and using BIO89-100 to treat FGF21 deficiency in a patient in need thereof. One U.S. application is pending in this family.

The second family is entitled “Mutant FGF-21 Peptide Conjugate and Uses Thereof” and is specifically directed to BIO89-100. The PCT Application for this family was filed on September 4, 2018 (PCT/IB2018/00112). A U.S. Prioritized Examination Continuation Patent Application (Application Serial No. 16/225,640) was filed on December 19, 2018 as a continuation of PCT/IB2018/0112 and from which U.S. Patent Number 10,407,479 was issued on September 10, 2019. The term of the U.S. Patent Number 10,407,479 is September 4, 2038. The issued claims are directed to BIO89-100 and a defined genus specifically encompassing BIO89-100 and compositions thereof (including site-specific mutations at positions 173 and 176), as well as methods for making and using BIO89-100 for a variety of therapeutic indications. Such indications include methods for treating NASH or metabolic syndrome. Subjects where there is a need to reduce blood glucose or to reduce HbA1C include those afflicted with diabetes Type 2, NASH and metabolic syndrome. The claims encompass different therapeutic regimens for administering BIO89-100 (e.g., once a week or once every two weeks), which regimens are based on BIO89-100’s surprisingly long half-life in vivo. One U.S. application is pending in this family. National phase entry of this PCT Application has been initiated in Australia (granted), Korea (allowed), Europe, China, Hong Kong, Japan (allowed), Canada and Israel to pursue global protection of specific mutant FGF21 peptide conjugates, and particularly BIO89-100, in these jurisdictions. Australian patent No. 2018322943 was granted on September 17, 2020 (expiry date: September 4, 2038).

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The third family is entitled “Methods Of Treatment Using Mutant FGF-21 Peptide Conjugates”. A U.S. patent application was filed on May 28, 2020 (US Serial Number 16/885,353). This patent application is not published.

The fourth family is entitled “Methods for promoting weight loss”. A PCT application was filed January 29, 2021 (PCT/IB2021/000044) with claims directed towards method to reduce total body weight, body fat content and/or BMI. National phase entry of this application is due by July 31, 2022.

We will continue to file patent applications to cover various formulations of FGF21. We have filed a provisional application on March 11, 2021 on stable liquid formulation of FGF21.

FASN Patents

Our FASN patent portfolio currently consists of three patent families, including patents and/or patent applications in the United States, the European Patent Convention, Canada, Mexico, Israel, China and Japan.

The first patent family, directed to TEV-48317, which we acquired from Teva under the FASN Agreement, and other 1,4-substituted piperidine-based FASN inhibitors, is currently protected by three granted U.S. patents that cover these compounds, pharmaceutical compositions comprising these compounds, and/or methods of treating FASN-mediated disorders using these compounds. The non-extended term for these patents would expire on June 17, 2036. A pending U.S. application has also been filed. The first patent family also includes two foreign patents and four patent applications. The second patent family is directed to other 1,4-substituted piperidine-based FASN inhibitors, pharmaceutical compositions, and methods of treating FASN-mediated disorders. The second patent family includes one granted U.S. patent, three foreign patents, and two foreign patent applications. The third patent family is directed to spiropiperidine FASN inhibitors, pharmaceutical compositions containing these compounds, and methods of treating FASN-mediated disorders using these compounds. The third patent family includes one U.S. patent application and five foreign patent applications.

Employees

As of December 31, 2020, we had 26 full-time employees and 27 total employees. 19 employees are engaged in research and development activities. None of our employees are represented by labor unions or covered by collective bargaining agreements. We consider our relationship with our employees to be good.

Corporate Information

We were incorporated in January 2018 in Israel under the name 89Bio Ltd. 89bio, Inc., the registrant whose name appears on the cover page of this Annual Report on Form 10-K, was incorporated in June 2019 for the purpose of an internal reorganization transaction. In September 2019, all of the equity holders of 89Bio Ltd. exchanged 100% of the equity of 89Bio Ltd. for 100% of the equity of 89bio, Inc. Following this exchange, 89Bio Ltd. became a wholly owned subsidiary of 89bio, Inc.

Our principal executive offices are located at 142 Sansome Street, San Francisco, California 94104 and our telephone number is (415) 500-4614. Our website is www.89bio.com. Information contained on or accessible through our website is not a part of this Annual Report on Form 10-K, and the inclusion of our website address in this Annual Report on Form 10-K is an inactive textual reference only.

We file electronically with the SEC our Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). We make available on our website at www.89bio.com, under “Investors,” free of charge, copies of these reports as soon as reasonably practicable after filing or furnishing these reports with the SEC.

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Implications of Being an Emerging Growth Company and a Smaller Reporting Company

We are an emerging growth company (“emerging growth company”), as defined in Section 2(a) of the Securities Act of 1933, as amended (the “Securities Act”), as modified by the Jumpstart Our Business Startups Act of 2012 (the “JOBS Act”), and we may take advantage of certain exemptions from various reporting requirements that are applicable to other public companies that are not emerging growth companies, including relief from the auditor attestation requirements of Section 404 of the Sarbanes-Oxley Act of 2002, as amended, less extensive disclosure obligations regarding executive compensation in our registration statements, periodic reports and proxy statements, exemptions from the requirements to hold a nonbinding advisory vote on executive compensation, and exemptions from stockholder approval of any golden parachute payments not previously approved. We may also elect to take advantage of other reduced reporting requirements in future filings. As a result, our stockholders may not have access to certain information that they may deem important and the information that we provide to our stockholders may be different than, and not comparable to, information presented by other public reporting companies. We could remain an emerging growth company until the earlier of (1) the last day of the year following the fifth anniversary of the completion of our initial public offering (“IPO”), (2) the last day of the year in which we have total annual gross revenue of at least $1.07 billion, (3) the last day of the year in which we are deemed to be a “large accelerated filer” as defined in Rule 12b-2 under the Exchange Act, which would occur if the market value of our common stock held by non-affiliates exceeded $700.0 million as of the last business day of the second fiscal quarter of such year or (4) the date on which we have issued more than $1.0 billion in non-convertible debt securities during the prior three-year period.

In addition, the JOBS Act also provides that an emerging growth company may take advantage of the extended transition period provided in the Securities Act for complying with new or revised accounting standards. An emerging growth company may therefore delay the adoption of certain accounting standards until those standards would otherwise apply to private companies. We have elected to avail ourselves of this exemption and, as a result, will not be subject to the same implementation timing for new or revised accounting standards as are required of other public companies that are not emerging growth companies, which may make comparison of our consolidated financial information to those of other public companies more difficult.

We are also a smaller reporting company (“smaller reporting company”), as defined in the Exchange Act. We may continue to be a smaller reporting company even after we are no longer an emerging growth company. We may take advantage of certain of the scaled disclosures available to smaller reporting companies and will be able to take advantage of these scaled disclosures for so long as (i) our voting and non-voting common stock held by non-affiliates is less than $250.0 million measured on the last business day of our second fiscal quarter or (ii) our annual revenue is less than $100.0 million during the most recently completed fiscal year and our voting and non-voting common stock held by non-affiliates is less than $700.0 million measured on the last business day of our second fiscal quarter.

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Item 1A. Risk Factors.

An investment in our common stock involves a high degree of risk. You should carefully consider the risks and uncertainties described below before deciding whether to make an investment decision with respect to shares of our common stock. You should also refer to the other information contained in this Annual Report on Form 10-K, including “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and our audited consolidated financial statements and related notes. Our business, financial condition, results of operations and prospects could be materially and adversely affected by any of these risks or uncertainties. In any such case, the trading price of our common stock could decline, and you could lose all or part of your investment. We caution you that the risks, uncertainties and other factors referred to below and elsewhere in this Annual Report on Form 10-K may not contain all of the risks, uncertainties and other factors that may affect our future results and operations. Moreover, new risks will emerge from time to time. It is not possible for us to predict all risks.

Risk Factor Summary

Investing in our common stock involves significant risks. You should carefully consider the risks described below before making a decision to invest in our common stock. If we are unable to successfully address these risks and challenges, our business, financial condition, results of operations, or prospects could be materially adversely affected. In such case, the trading price of our common stock would likely decline, and you may lose all or part of your investment. Below is a summary of some of the risks we face.

• | We are a clinical-stage biopharmaceutical company with a limited operating history and no products approved for commercial sale. We have incurred net losses since our inception, we expect to incur significant and increasing operating losses and we may never be profitable. Our stock is a highly speculative investment.

• | The ongoing COVID-19 pandemic has resulted and may in the future result in significant disruptions to our clinical trials or other business operations, which could have a material adverse effect on our business.

• | Our business depends on the success of BIO89-100, our only product candidate under clinical development, which has not completed a pivotal trial. If we are unable to obtain regulatory approval for and successfully commercialize BIO89-100 or other future product candidates, or we experience significant delays in doing so, our business will be materially harmed.

• | Clinical drug development involves a lengthy and expensive process with uncertain timelines and uncertain outcomes, and the results of prior preclinical or clinical trials are not necessarily predictive of our future results.

• | If we experience delays in clinical testing, our commercial prospects will be adversely affected, our costs may increase and our business may be harmed.

• | If we encounter difficulties in enrolling patients in our clinical trials, our clinical development activities could be delayed or otherwise adversely affected.

• | BIO89-100 and any future product candidates may cause undesirable side effects or have other properties that could delay or prevent their regulatory approval or limit the commercial profile of an approved label.

• | We are developing BIO89-100 for the treatment of NASH, an indication for which there are no approved products. This makes it difficult to predict the timing and costs of the clinical development of BIO89-100 for the treatment of NASH.

• | Lack of efficacy, adverse events or undesirable side effects may emerge in clinical trials conducted by third parties developing FGF product candidates, which could adversely affect our stock price, our ability to attract additional capital and our development program.

• | Interim, topline and preliminary data from our clinical trials that we announce or publish from time to time may change as more patient data become available and are subject to audit and verification procedures that could result in material changes in the final data.

• | We have relied on, and expect to continue to rely on, third-party manufacturers to produce BIO89-100 or any future product candidates. Any failure by a third-party manufacturer to produce acceptable product candidates for us pursuant to our specifications and regulatory standards may delay or impair our ability to initiate or complete our clinical trials, obtain and maintain regulatory approvals or commercialize approved products.

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• | The manufacture of biologic products is complex and we are subject to many manufacturing risks, any of which could substantially increase our costs and limit supply of our products.

• | We will require substantial additional capital to finance our operations, which may not be available to us on acceptable terms, or at all. As a result, we may not complete the development and commercialization of BIO89-100 or develop new product candidates.

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

• | Unstable market and economic conditions may have serious adverse consequences on our business and financial condition.

• | Our Loan and Security Agreement with Silicon Valley Bank contains certain covenants that could adversely affect our operations and, if an event of default were to occur, we could be forced to repay any outstanding indebtedness sooner than planned and possibly at a time when we do not have sufficient capital to meet this obligation.

• | BIO89-100 has not received regulatory approval. If we are unable to obtain regulatory approvals to market BIO89-100 or any future product candidates, our business will be adversely affected.

• | Our success depends upon our ability to obtain and maintain intellectual property protection for our products and technologies.

• | We rely on a license from Teva and a sublicense from ratiopharm to patents and know-how related to glycoPEGylation technology that are used in the development, manufacture and commercialization of BIO89-100. Any termination or loss of significant rights, including the right to glycoPEGylation technology, or breach, under these agreements or any future license agreement related to our product candidates, would materially and adversely affect our ability to continue the development and commercialization of the related product candidates.

Risks Related to Our Business and Industry

We are a clinical-stage biopharmaceutical company with a limited operating history and no products approved for commercial sale. We have incurred net losses since our inception, we expect to incur significant and increasing operating losses and we may never be profitable. Our stock is a highly speculative investment.

We are a clinical-stage biopharmaceutical company with a limited operating history that may make it difficult to evaluate the success of our business to date and to assess our future viability. We commenced operations in 2018, and to date, our operations have been focused on organizing and staffing our company, raising capital, acquiring our initial product candidate, BIO89-100 and licensing certain related technology, conducting research and development activities, including preclinical studies and clinical trials, and providing general and administrative support for these operations. Investment in biopharmaceutical product development is highly speculative because it entails substantial upfront capital expenditures and significant risk that any potential product candidate will fail to demonstrate adequate effect and/or an acceptable safety profile, gain regulatory approval and become commercially viable. We have no products approved for commercial sale, we have not generated any revenue from product sales to date and we continue to incur significant research and development and other expenses related to our ongoing operations. We have limited experience as a company conducting clinical trials and no experience as a company commercializing any products.

BIO89-100 is in development and, to date, we have not generated any revenue from the licensing or commercialization of BIO89-100. We will not be able to generate product revenue unless and until BIO89-100 or any future product candidate, alone or with future partners, successfully completes clinical trials, receives regulatory approval and is successfully commercialized. As BIO89-100 is in development, we do not expect to receive revenue from it for a number of years, if ever. Although we may seek to obtain revenue from collaboration or licensing agreements with third parties, we currently have no such agreements that could provide us with material, ongoing future revenue and we may never enter into any such agreements.

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We are not profitable and have incurred net losses since our inception. Consequently, predictions about our future success or viability may not be as accurate as they would be if we had a longer operating history or a history of successfully developing and commercializing pharmaceutical products. We have spent, and expect to continue to spend, significant resources to fund research and development of, and seek regulatory approvals for, BIO89-100 and any future product candidates. We expect to incur substantial and increasing operating losses over the next several years as our research, development clinical trial and manufacturing activities increase. In addition, because of the numerous risks and uncertainties associated with pharmaceutical product development, including that our product candidates may not advance through development or achieve the endpoints of applicable clinical trials, we are unable to predict the timing or amount of increased expenses, or if or when we will achieve or maintain profitability. The size of our future net losses will depend, in part, on the rate of future growth of our expenses and our ability to generate revenue. The net losses we incur may fluctuate significantly from quarter-to-quarter such that a period-to-period comparison of our results of operations may not be a good indication of our future performance. Even if we eventually generate product revenue, we may never be profitable and, if we do achieve profitability, we may not be able to sustain or increase profitability on a quarterly or annual basis.

The ongoing COVID-19 pandemic has resulted and may in the future result in significant disruptions to our clinical trials or other business operations, which could have a material adverse effect on our business.

Our business and its operations, including but not limited to our research and development activities, could be adversely affected by health epidemics in regions where we have business operations, and such health epidemics could cause significant disruption in the operations of third parties upon whom we rely. In response to public health directives and orders related to COVID-19 and based on guidance from public health officials, we have implemented and continue to implement work-from-home policies for our employees on an office-by-office basis. The effects of executive and similar government orders, shelter-in-place orders and our work-from-home policies may negatively impact our growth, including our ability to recruit and onboard new employees, and productivity, disrupt our business and delay our preclinical and clinical programs and timelines, the magnitude of which will depend, in part, on the length and severity of the restrictions and other limitations on our ability to conduct our business in the ordinary course. These and similar, and perhaps more severe, disruptions in our operations could negatively impact our business, operating results and financial condition.

Our clinical trials have been and may continue to be affected by the COVID-19 pandemic. For example, while we initiated the Phase 2 trial (ENTRIGUE) of BIO89-100 for the treatment of SHTG and a paired-biopsy histology cohort as part of the Phase 1b/2a trial of BIO89-100 in NASH in 2020, our successful completion of these trials will depend on the external environment with respect to COVID-19 remaining conducive to executing the trial safely and effectively. Similarly, while we expect to initiate a Phase 2b trial of BIO89-100 in NASH patients in the first half of 2021, we may be delayed in the initiation of such trial due to COVID-19 or the related government restrictions.

In addition, quarantines, shelter-in-place, executive and similar government orders, or the perception that such orders, shutdowns or other restrictions on the conduct of business operations could occur, related to COVID-19 or other infectious diseases, have impacted and may continue to impact personnel at third-party manufacturing facilities in the United States, Europe and other countries, or the availability or cost of materials we use or require to conduct our business, including product development, which would disrupt our supply chain. Furthermore, some of our manufacturers and suppliers are in Europe and may be impacted by port closures and other restrictions resulting from the COVID-19 pandemic, which may disrupt our supply chain or limit our ability to obtain sufficient materials for our drug products. In particular, BTPH, our sole source supplier for BIO89-100, has missed certain project deadlines for our manufacturing scale-up due to quarantine orders and has forecasted other delays due to COVID-19-related impacts on their suppliers; however, we do not expect delays to the overall timeline for the delivery of clinical supplies.

If COVID-19 continues to spread in the United States and elsewhere, we may experience additional disruptions that could severely impact our business, preclinical studies and clinical trials, including: delays in receiving authorization from local regulatory authorities to initiate our planned clinical trials; delays or difficulties in enrolling patients in our clinical trials; delays or difficulties in clinical site initiation, including difficulties in recruiting clinical site investigators and clinical site staff; delays in clinical sites receiving the supplies and materials needed to conduct our clinical trials; changes in local regulations as part of a response to the COVID-19 pandemic which may require us to change the ways in which our clinical trials are conducted and result in unexpected costs, or

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discontinuing our clinical trials altogether; a diversion of healthcare resources away from the conduct of clinical trials, including the diversion of hospitals serving as our clinical trial sites and hospital staff supporting the conduct of our clinical trials; interruption of key clinical trial activities, such as clinical trial site monitoring and data entry and verification, due to limitations on travel imposed or recommended by federal or state governments, employers and others, or interruption of clinical trial subject visits and study procedures, the occurrence of which could affect the completeness and integrity of clinical trial data and, as a result, determine the outcomes of the trial; the risk that participants enrolled in our clinical trials will acquire COVID-19 while the clinical trial is ongoing, which could impact the results of the clinical trial, including by increasing the number of observed adverse events; the risk that participants enrolled in our clinical trials will not be able to travel to our clinical trial sites as a result of quarantines or other restrictions resulting from COVID-19 or comply with clinical trial protocols if quarantines impede patient movement or interrupt healthcare services; interruptions or delays in preclinical studies due to restricted or limited operations at our research and development laboratory facilities; limitations in employee resources that would otherwise be focused on the conduct of our clinical trials; the refusal of the FDA to accept data from clinical trials in affected geographies; and interruption or delays to our clinical activities.

The COVID-19 pandemic continues to evolve rapidly. The ultimate impact of the COVID-19 pandemic or a similar public health emergency is highly uncertain and subject to change. We do not yet know the full extent of potential delays or impacts on our business, our clinical trials, healthcare systems, or the global economy as a whole. However, any one or a combination of these events could have an adverse effect on the operation of and results from our clinical trials and on our other business operations, including preventing or delaying approval for BIO89-100.

Our business depends on the success of BIO89-100, our only product candidate under clinical development, which has not completed a pivotal trial. If we are unable to obtain regulatory approval for and successfully commercialize BIO89-100 or other future product candidates, or we experience significant delays in doing so, our business will be materially harmed.

To date, the primary focus of our product development has been BIO89-100 for the treatment of patients with NASH. Currently, BIO89-100 is our only product candidate under clinical development. This may make an investment in our company riskier than similar companies that have multiple product candidates in active development and that therefore may be able to better sustain a failure of a lead candidate. Successful continued development and ultimate regulatory approval of BIO89-100 for the treatment of NASH or other indications, including SHTG, is critical to the future success of our business. We have invested, and will continue to invest, a significant portion of our time and financial resources in the clinical development of BIO89-100. If we cannot successfully develop, obtain regulatory approval for and commercialize BIO89-100, we may not be able to continue our operations. The future regulatory and commercial success of BIO89-100 is subject to a number of risks, including that if approved for NASH or SHTG, BIO89-100 will likely compete with products that may reach approval for the treatment of NASH prior to BIO89-100, products that are currently approved for the treatment of SHTG and the off-label use of currently marketed products for NASH and SHTG.

Clinical drug development involves a lengthy and expensive process with uncertain timelines and uncertain outcomes, and the results of prior preclinical or clinical trials are not necessarily predictive of our future results.

BIO89-100 and any future product candidates will be subject to rigorous and extensive clinical trials and extensive regulatory approval processes implemented by the FDA and comparable foreign regulatory authorities before obtaining marketing approval from these regulatory authorities. The drug development and approval process is lengthy and expensive, and approval is never certain. Investigational new drugs, such as BIO89-100, may not prove to be safe and effective in clinical trials. We have no direct experience as a company in conducting later stage clinical trials required to obtain regulatory approval. We may be unable to conduct clinical trials at preferred sites, enlist clinical investigators, enroll sufficient numbers of participants or begin or successfully complete clinical trials in a timely fashion, if at all. In addition, the design of a clinical trial can determine whether its results will support approval of a product, and flaws in the design of a clinical trial may not become apparent until the clinical trial is well advanced. We may be unable to design and execute a clinical trial to support regulatory approval. Even if a current clinical trial is successful, it may be insufficient to demonstrate that BIO89-100 is safe or effective for registration purposes.

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There is a high failure rate for drugs and biologic products proceeding through clinical trials. Failure can occur at any time during the clinical trial process. The results of preclinical studies and early clinical trials of BIO89-100 or any future product candidate may not be predictive of the results of later-stage clinical studies or trials and the results of studies or trials in one set of patients or line of treatment may not be predictive of those obtained in another. In fact, many companies in the pharmaceutical and biotechnology industries have suffered significant setbacks in late stage clinical trials even after achieving promising results in preclinical studies and earlier stage clinical trials. In addition, data obtained from preclinical and clinical activities is subject to varying interpretations, which may delay, limit or prevent regulatory approval. It is impossible to predict when or if BIO89-100 or any future product candidate will prove effective or safe in humans or will receive regulatory approval. Owing in part to the complexity of biological pathways, BIO89-100 or any future product candidate may not demonstrate in patients the biochemical and pharmacological properties we anticipate based on laboratory studies or earlier stage clinical trials, and they may interact with human biological systems or other drugs in unforeseen, ineffective or harmful ways. The number of patients exposed to product candidates and the average exposure time in the clinical development programs may be inadequate to detect rare adverse events or findings that may only be detected once a product candidate is administered to more patients and for greater periods of time. To date, our Phase 1a and Phase 1b/2a clinical trial s ha ve involved small patient population s and, because of the small sample size in such trial s, the results of th ese clinical trial s may be subject to substantial variability and may not be indicative of either future interim results or final results in future trials of patients with liver or cardio-metabolic diseases. If we are unable to successfully demonstrate the safety and efficacy of BIO89-100 or other future product candidates and receive the necessary regulatory approvals, our business will be materially harmed.

If we experience delays in clinical testing, our commercial prospects will be adversely affected, our costs may increase and our business may be harmed.

We cannot guarantee that we will be able to initiate and complete clinical trials and successfully accomplish all required regulatory activities or other activities necessary to gain approval and commercialize BIO89-100 or any future product candidates. We currently have two active investigational new drug (“IND”) applications with the FDA in the United States for BIO89-100. In the future, we may file an additional IND with another division for any future indications or future product candidates. If any such future IND is not approved by the FDA, our clinical development timeline may be negatively impacted and any future clinical programs may be delayed or terminated. As a result, we may be unable to obtain regulatory approvals or successfully commercialize our products. We do not know whether any other clinical trials will begin as planned, will need to be restructured or will be completed on schedule, or at all. Our product development costs will increase if we experience delays in clinical testing. Significant clinical trial delays also could shorten any periods during which we may have the exclusive right to commercialize BIO89-100 and any future product candidates or allow our competitors to bring products to market before we do, which would impair our ability to successfully commercialize BIO89-100 or any future product candidates and may harm our business, results of operations and prospects. Our or our future collaborators’ inability to timely complete clinical development could result in additional costs to us as well as impair our ability to generate product revenue, continue development, commercialize BIO89-100 and any future product candidates, reach sales milestone payments and receive royalties on product sales. In addition, if we make changes to a product candidate including, for example, a new formulation, we may need to conduct additional nonclinical studies or clinical trials to bridge or demonstrate the comparability of our modified product candidate to earlier versions, which could delay our clinical development plan or marketing approval for our current product candidate and any future product candidates.

If we encounter difficulties in enrolling patients in our clinical trials, our clinical development activities could be delayed or otherwise adversely affected.

The timely completion of clinical trials largely depends on patient enrollment. We may encounter delays in enrolling, or be unable to enroll, a sufficient number of patients to complete any of our future clinical trials, and even once enrolled, we may be unable to retain a sufficient number of patients to complete any of our trials. Furthermore, as a result of the inherent difficulties in diagnosing NASH, which can currently only be definitively diagnosed through a liver biopsy, and identifying SHTG patients, and the significant competition for recruiting NASH and SHTG patients in clinical trials, we or our future collaborators may be unable to enroll the patients we need to complete clinical trials on a timely basis, or at all. In addition, our competitors, some of whom have significantly greater resources than we do, are conducting clinical trials for the same indications and seek to enroll

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patients in their studies that may otherwise be eligible for our clinical studies or trials. S ince the number of qualified clinical investigators is limited, we expect to conduct some of our clinical trials at the same clinical trial sites that some of our competitors use, which could further reduce the number of patients who are available for our clinical trials in these sites. Our inability to enroll a sufficient number of patients for our clinical trials would result in significant delays or may require us to abandon one or more clinical trials altogether. Even if we are able to enroll a sufficient number of patients in our clinical studies or trials, delays in patient enrollment may result in increased costs or may affect the timing or outcome of our clinical trials, which could prevent completion of these trials and adversely affect our ability to advance the development of BIO89-100 and any future product candidates.

BIO89-100 and any future product candidates may cause undesirable side effects or have other properties that could delay or prevent their regulatory approval or limit the commercial profile of an approved label.

Undesirable side effects caused by BIO89-100 or any future product candidates could cause us or regulatory authorities to interrupt, delay or halt clinical trials and could result in a more restrictive label or the delay or denial of regulatory approval by the FDA or other comparable foreign regulatory authorities. Additional clinical studies may be required to evaluate the safety profile of BIO89-100 or any future product candidates. As with other drugs, we have seen evidence of adverse effects in animal and human studies and it is possible that other adverse effects will become apparent in ongoing or future animal or human safety studies. It may be difficult to discern whether certain events or symptoms observed during our clinical trials or by patients using our approved products are related to BIO89-100 or any future product candidates or approved products or some other factor. As a result, we and our development programs may be negatively affected even if such events or symptoms are ultimately determined to be unlikely related to BIO89-100 or any future product candidates or approved products. Further, we expect that BIO89-100 will require multiple administrations via subcutaneous injection in the course of a clinical trial. This chronic administration increases the risk that rare adverse events or chance findings are discovered in the commercial setting, where BIO89-100 would be administered to more patients or for greater periods of time, that were not uncovered by our clinical drug development programs.

We are developing BIO89-100 for the treatment of NASH, an indication for which there are no approved products. This makes it difficult to predict the timing and costs of the clinical development of BIO89-100 for the treatment of NASH.

We are developing BIO89-100 for the treatment of NASH, an indication for which there are no approved products. Because there is no established regulatory approval process for NASH, the development of a novel product candidates such as BIO89-100 may be more expensive and take longer than for other, better known or extensively studied product candidates. As other companies are in later stages of clinical trials for their potential NASH therapies, we expect that the path for regulatory approval for NASH therapies may continue to evolve in the near term as these other companies refine their regulatory approval strategies and interact with regulatory authorities. Such evolution may impact our future clinical trial designs, including trial size and endpoints, in ways that we cannot predict today. Certain of our competitors have recently experienced regulatory setbacks for NASH therapies following communications from the FDA. We currently do not know the impact, if any, that these setbacks could have on the path for regulatory approval for NASH therapies generally or for BIO89-100. Our anticipated development costs would likely increase if development of BIO89-100 or any future product candidate is delayed because we are required by the FDA to perform studies or trials in addition to, or different from, those that we currently anticipate.

We are also developing BIO89-100 for the treatment of SHTG. Clinical trials for the treatment of SHTG may be relatively costly and time consuming. The requirements for approval by the FDA and comparable foreign regulatory authorities may change over time and this may require changes to ongoing or future clinical trial designs that could impact timelines and cost.

Lack of efficacy, adverse events or undesirable side effects may emerge in clinical trials conducted by third parties developing FGF product candidates, which could adversely affect our stock price, our ability to attract additional capital and our development program.

Lack of efficacy, adverse events or undesirable side effects may emerge in clinical trials conducted by third parties developing FGF product candidates like ours. For example, Bristol-Myers Squibb Company and Akero

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Therapeutics, Inc. are also developing FGF21 product candidates for the treatment of NASH. We have no control over their clinical trials or development program, and lack of efficacy, adverse events or undesirable side effects experienced by subjects in their clinical trials could adversely affect our stock price, our ability to attract additional capital and our clinical development plans for BIO89-100 or even the viability of BIO89-100 as a product candidate, including by creating a negative perception of FGF therapeutics by healthcare providers or patients.

Interim, topline and preliminary data from our clinical trials that we announce or publish from time to time may change as more patient data become available and are subject to audit and verification procedures that could result in material changes in the final data.

From time to time, we may publicly disclose preliminary or topline data from our clinical trials, which are based on a preliminary analysis of then-available data, and the results and related findings and conclusions are subject to change following a more comprehensive review of the data related to the particular study or trial. We also make assumptions, estimations, calculations and conclusions as part of our analyses of data, and we may not have received or had the opportunity to fully and carefully evaluate all data. As a result, the topline results that we report may differ from future results of the same studies, or different conclusions or considerations may qualify such results, once additional data have been received and fully evaluated. Topline data also remain subject to audit and verification procedures that may result in the final data being materially different from the preliminary data we previously published. As a result, topline data should be viewed with caution until the final data are available. From time to time, we may also disclose interim data from our clinical trials. In addition, we may report interim analyses of only certain endpoints rather than all endpoints. Interim data from clinical trials that we may complete are subject to the risk that one or more of the clinical outcomes may materially change as patient enrollment continues and more patient data become available.

We have relied on, and expect to continue to rely on, third-party manufacturers to produce BIO89-100 or any future product candidates. Any failure by a third-party manufacturer to produce acceptable product candidates for us pursuant to our specifications and regulatory standards may delay or impair our ability to initiate or complete our clinical trials, obtain and maintain regulatory approvals or commercialize approved products.

We do not own or operate manufacturing facilities for the production of clinical or commercial quantities of our product candidates, and we lack the resources and the capabilities to do so. As a result, we currently rely, and expect to rely for the foreseeable future, on third-party manufacturers to supply us with BIO89-100 and any future product candidates. We currently have a sole source relationship with BTPH pursuant to which they supply us with BIO89-100. If there should be any disruption in our supply arrangement with BTPH, including any adverse events affecting BTPH, it could have a negative effect on the clinical development of BIO89-100 and other operations while we work to identify and qualify an alternate supply source. In addition, we will require large quantities of BIO89-100 for large clinical trials and to commercialize BIO89-100. Our current manufacturer may not be able to scale production to the larger quantities and we may not be able to find another manufacturer who has the capacity to manufacture a commercial-scale quantity of BIO89-100.

We do not have a long-term supply agreement with any third-party manufacturer. Reliance on third-party manufacturers entails risks to which we would not be subject if we manufacture product candidates or products ourselves. For example, if we do not maintain our key manufacturing relationships, we may fail to find replacement manufacturers or develop our own manufacturing capabilities in a timely manner or at all, which could delay or impair our ability to obtain regulatory approval for our products and substantially increase our costs or deplete profit margins, if any. If we do find replacement manufacturers, we may not be able to enter into agreements with them on terms and conditions favorable to us, and there could be a substantial delay before new facilities could be qualified and registered with the FDA and other comparable foreign regulatory authorities.

We have begun producing certain of the reagents required for the glycoPEGylation at BTPH using the know-how transferred to us from Teva Pharmaceutical Industries Ltd (“Teva”) under our Reagent Supply and Technology Transfer Agreement. We have not completed the manufacturing process for these reagents and cannot guarantee that we will be able to produce them successfully, or scale up our production for the quantities needed commercialization.

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Teva continues to supply us with certain reagents and will continue to do so until December 31, 2022. We expect the manufacturing of such reagents will be transferred to a new supplier prior to the end of 2022. Any complications arising under our agreement with Teva or any difficulties securing a new supplier could considerably delay the manufacture of BIO89-100. Any significant delay in the acquisition or decrease in the availability of these raw materials from Teva or any new supplier could considerably delay the manufacture of BIO89-100, which could adversely impact the timing of any planned trials or the regulatory approvals of BIO89-100.

The FDA and other comparable foreign regulatory authorities require manufacturers to register manufacturing facilities. The FDA and other comparable foreign regulatory authorities also inspect these facilities to confirm compliance with cGMP. We have little to no control regarding the occurrence of third-party manufacturer incidents. Any failure to comply with cGMP requirements or other FDA or comparable foreign regulatory requirements could adversely affect our clinical research activities and our ability to develop BIO89-100 or any future product candidates and market our products following approval. Our sole source supplier, BTPH, has not yet manufactured a commercial product, and as a result, has not been subject to inspection by the FDA and other comparable foreign regulatory authorities.

Our current and anticipated future dependence upon others for the manufacture of our product candidates may adversely affect our future profit margins and our ability to develop our product candidates and commercialize any products that receive regulatory approval on a timely basis. If we are required to change manufacturers for any reason, we will be required to verify that the new manufacturer maintains facilities and procedures that comply with quality standards and with all applicable regulations and guidelines. For example, in the event that we need to switch our third-party manufacturer of BIO89-100 from BTPH, which is our sole manufacturing source for BIO89-100, we anticipate that the complexity of the glycoPEGylation manufacturing process may materially impact the amount of time it may take to secure a replacement manufacturer. The delays associated with the verification of a new manufacturer, if we are able to identify an alternative source, could negatively affect our ability to develop product candidates in a timely manner or within budget.

The manufacture of biologic products is complex and we are subject to many manufacturing risks, any of which could substantially increase our costs and limit supply of our products.

To date, BIO89-100 has been manufactured by a single third-party manufacturer, BTPH, solely for preclinical studies and clinical trials. The process of manufacturing BIO89-100, and in particular, the glycoPEGylation process, is complex, highly regulated, subject to several risks and requires significant expertise and capital investment, including the development of advanced manufacturing techniques and process controls. Manufacturers of biologic products often encounter difficulties in production, including difficulties with production costs and yields, quality control, including stability of the product, quality assurance testing, operator error and shortages of qualified personnel, as well as compliance with strictly enforced federal, state and foreign regulations. We cannot assure you that any stability or other issues relating to the manufacture of BIO89-100 will not occur in the future. We have limited process development capabilities and have access only to external manufacturing capabilities. We do not have and we do not currently plan to acquire or develop the facilities or capabilities to manufacture bulk drug substance or filled drug product for use in human clinical trials or commercialization.

We will require substantial additional capital to finance our operations, which may not be available to us on acceptable terms, or at all. As a result, we may not complete the development and commercialization of BIO89-100 or develop new product candidates.

As a clinical-stage biopharmaceutical company, our operations have consumed significant amounts of cash since our inception. We expect our research and development expenses to increase substantially in connection with our ongoing activities, particularly as we conduct clinical trials of and seek regulatory approvals for BIO89-100. We believe that our existing cash, cash equivalents and short-term investments, together with the proceeds available from our line of credit pursuant to our Loan Agreement (as defined above), will fund our projected operating requirements into the second quarter of 2023.

We will require additional capital to discover, develop, obtain regulatory approval for and commercialize BIO89-100 and any future product candidates. We do not have any committed external source of funds other than the unused portion of the line of credit available to us pursuant to the Loan Agreement. We expect to finance future cash needs through public or private equity or debt offerings or product collaborations. Additional capital may not be available in sufficient amounts or on reasonable terms, if at all. If we do not raise additional capital, we may not

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be able to expand our operations or otherwise capitalize on our business opportunities, our business and financial condition will be negatively impacted and we may need to: significantly delay, scale back or discontinue research and discovery efforts and the development or commercialization of any product candidates or cease operations altogether; seek strategic alliances for research and development programs when we otherwise would not, or at an earlier stage than we would otherwise desire or on terms less favorable than might otherwise be available; or relinquish, or license on unfavorable terms, our rights to technologies or any product candidates that we otherwise would seek to develop or commercialize ourselves.

In addition, if BIO89-100 receives approval and is commercialized, we will be required to make milestone and royalty payments to Teva, from whom we acquired certain patents and intellectual property relating to BIO89-100, and from whom we licensed patents and know-how related to glycoPEGylation technology that is used in the manufacture of BIO89-100. For additional information regarding this license agreement, please see Note 5 to of our accompanying audited consolidated financial statements.

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

The biopharmaceutical industry is intensely competitive and subject to rapid innovation and significant technological advancements. Our competitors include multinational pharmaceutical companies, specialized biotechnology companies, universities and other research institutions. A number of biotechnology and pharmaceutical companies are pursuing the development or marketing of pharmaceuticals that target the same diseases that we are targeting. Certain of these companies have recently published positive data regarding their clinical trials, which may further increase the competition we face. Smaller or earlier-stage companies may also prove to be significant competitors, particularly through collaborative arrangements with large, established companies. Given the high incidence of NASH and SHTG, it is likely that the number of companies seeking to develop products and therapies for the treatment of liver and cardio-metabolic diseases, such as NASH and SHTG, will increase.

There are numerous currently approved therapies for treating diseases other than NASH and some of these currently approved therapies may exert effects that could be similar to BIO89-100 in NASH. Many of these approved drugs are well-established therapies or products and are widely accepted by physicians, patients and third-party payors. Some of these drugs are branded and subject to patent protection, and others are available on a generic basis. This may make it difficult for us to differentiate our products from currently approved therapies, which may adversely impact our business strategy. We expect that if BIO89-100 or any future product candidates are approved, they will be priced at a significant premium over competitive generic products, including branded generic products. Insurers and other third-party payors may also encourage the use of generic products or specific branded products prior to utilization of BIO89-100. In addition, many companies are developing new therapeutics, and we cannot predict what the standard of care will be as BIO89-100 or any future product candidates progress through clinical development. In addition, to the extent BIO89-100 or any future product candidates are approved for liver or cardio-metabolic indications, such as SHTG, the commercial success of our products will also depend on our ability to demonstrate benefits over the then-prevailing standard of care, including diet, exercise and lifestyle modifications.

Further, if BIO89-100 or any future product candidates are approved for the treatment of SHTG, we will compete with currently approved therapies and therapies further along in development. Our competitors both in the United States and abroad include large, well-established pharmaceutical and generic companies with significantly greater name recognition. Our competitors may be able to charge lower prices than we can, which may adversely affect our market acceptance. Many of these competitors have greater resources than we do, including financial, product development, marketing, personnel and other resources.

If our competitors market products that are more effective, safer or cheaper than our products or that reach the market sooner than our products, we may not achieve commercial success. Many of our competitors have substantially greater financial, technical, human and other resources than we do and may be better equipped to develop, manufacture and market technologically superior products. As a result, our competitors may obtain regulatory approval of their products more rapidly than we do or may obtain patent protection or other intellectual property rights that limit our ability to develop or commercialize our product candidate or any future product candidates. Our competitors may also develop and succeed in obtaining approval for drugs that are more effective,

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more convenient, more widely used and less costly or have a better safety profile than our products and these competitors may also be more successful than we are in manufacturing and marketing their products.

Unstable market and economic conditions may have serious adverse consequences on our business and financial condition.

Global credit and financial markets have experienced extreme disruptions at various points over the last few decades. If another such disruption in credit and financial markets and deterioration of confidence in economic conditions occurs, it may make any necessary debt or equity financing more difficult to complete, more costly, and more dilutive. Failure to secure any necessary financing in a timely manner and on favorable terms could have a material adverse effect on our growth strategy, financial performance and share price and could require us to delay or abandon development or commercialization plans. In addition, there is a risk that one or more of our service providers, manufacturers or other partners would not survive or be able to meet their commitments to us under such circumstances, which could directly affect our ability to attain our operating goals on schedule and on budget.

Our Loan and Security Agreement with Silicon Valley Bank (the “Loan Agreement”) contains certain covenants that could adversely affect our operations and, if an event of default were to occur, we could be forced to repay any outstanding indebtedness sooner than planned and possibly at a time when we do not have sufficient capital to meet this obligation.

Pursuant to the Loan Agreement, we have pledged substantially all of our assets, other than our intellectual property rights, and have agreed that we may not sell or assign rights to our patents and other intellectual property without the prior consent of Silicon Valley Bank (“SVB”). Additionally, the Loan Agreement contains certain affirmative and negative covenants that could prevent us from taking certain actions without the consent of our lenders. These covenants may limit our flexibility in operating our business and our ability to take actions that might be advantageous to us and our stockholders. The Loan Agreement also includes customary events of default, including, among other things, a change of control. Upon the occurrence and continuation of an event of default, all amounts due under the Loan Agreement become (in the case of a bankruptcy event), or may become (in the case of all other events of default and at the option of SVB), immediately due and payable. If an event of default under the Loan Agreement should occur, we could be required to immediately repay any outstanding indebtedness. If we are unable to repay such debt, the lenders would be able to foreclose on the secured collateral, including our cash accounts, and take other remedies permitted under the Loan Agreement. Even if we are able to repay any indebtedness on an event of default, the repayment of these sums may significantly reduce our working capital and impair our ability to operate as planned.

We may encounter difficulties in managing our growth, which could adversely affect our operations.

We are in the early stages of building the full team that we anticipate we will need to complete the development BIO89-100 and other future product candidates. As we advance our preclinical and clinical development programs for product candidates, seek regulatory approval in the United States and elsewhere and increase the number of ongoing product development programs, we anticipate that we will need to increase our product development, scientific and administrative headcount. We will also need to establish commercial capabilities in order to commercialize any product candidates that may be approved. Such an evolution may impact our strategic focus and our deployment and allocation of resources. Our ability to manage our operations and growth effectively depends upon the continual improvement of our procedures, reporting systems and operational, financial and management controls. We may not be able to implement administrative and operational improvements in an efficient or timely manner and may discover deficiencies in existing systems and controls. In addition, in order to continue to meet our obligations as a public company and to support our anticipated long-term growth, we will need to increase our general and administrative capabilities. Our management, personnel and systems may experience difficulty in adjusting to our growth and strategic focus.

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We must attract and retain highly skilled employees in order to succeed. If we are not able to retain our current senior management team and our scientific advisors or continue to attract and retain qualified scientific, technical and business personnel, our business will suffer.

We may not be able to attract or retain qualified personnel and consultants due to the intense competition for such individuals in the biotechnology and pharmaceutical industries. If we are not able to attract and retain necessary personnel and consultants to accomplish our business objectives, it may significantly impede the achievement of our development and commercial objectives and our ability to implement our business strategy. In addition, we are highly dependent on the development, regulatory, manufacturing, commercialization and financial expertise of the members of our executive team, as well as other key employees and consultants. If we lose one or more of our executive officers or other key employees or consultants, our ability to implement our business strategy successfully could be seriously harmed.

We are developing a new drug product formulation for BIO89-100 and we may be unsuccessful. Any changes in methods of product candidate manufacturing or formulation may result in the need to perform new clinical trials or obtain new drug product, which would require additional costs and cause delay.

We are developing a new drug product formulation of BIO89-100 for late stage clinical trials and commercialization. Our current drug product is stored as a frozen liquid and is therefore not well-suited to larger clinical trials or commercialization. We have developed a new refrigerated liquid formulation and have engaged a formulation development company to also explore a freeze-dried, or lyophilized, formulation. We have commenced development of a pre-filled syringe for the new drug product formulation and we also plan to begin development of a pen-type autoinjector. There is no assurance that we will be successful in developing a new drug product formulation, a pre-filled syringe or an autoinjector on a timely basis or at all, which could impede our development and commercialization strategy for BIO89-100. The FDA or other comparable foreign regulatory authorities could require nonclinical studies or clinical trials to support introduction of any new formulation, pre-filled syringe and autoinjector, which could delay completion of clinical trials, require the conduct of bridging clinical trials or the repetition of one or more clinical trials, increase our clinical trial costs, delay approval of BIO89-100 and jeopardize our ability to commence product sales and generate revenue from BIO89-100, if approved.

We rely on third parties for certain aspects of our product candidate development process and we may not be able to obtain and maintain the third-party relationships that are necessary to develop, commercialize and manufacture some or all of our product candidates.

We expect to depend on collaborators, partners, licensees, clinical investigators, CROs, manufacturers and other third parties to support our discovery efforts, to formulate product candidates, to conduct clinical trials for some or all of our product candidates, to manufacture clinical and commercial scale quantities of our drug substance and drug product and to market, sell and distribute any products we successfully develop. Any of these third parties may terminate their engagements with us at any time. If we need to enter into alternative arrangements, it would delay our product development activities and such alternative arrangements may not be available on terms acceptable to us. We also expect to rely on other third parties to store and distribute drug supplies for our clinical trials. Any performance failure on the part of our distributors could delay clinical development, marketing approval and/or commercialization of BIO89-100 or any future product candidates, producing additional losses and depriving us of potential revenue.

If we fail to develop and commercialize additional product candidates, we may be unable to grow our business.

Although the development and commercialization of BIO89-100 is currently our primary focus, as part of our longer-term growth strategy, we plan to evaluate the development and commercialization of other therapies related to NASH and other liver and cardio-metabolic diseases. The success of this strategy depends primarily upon our ability to identify and validate new therapeutic candidates, and to identify, develop and commercialize new drugs and biologics. Our research efforts may initially show promise in discovering potential new drugs and biologics, yet fail to yield product candidates for clinical development for a number of reasons.

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We may use our limited financial and human resources to pursue a particular research program or product candidate that is ultimately unsuccessful or less successful than other programs or product candidates that we may have forgone or delayed.

Because we have limited personnel and financial resources, we may forego or delay the development of certain programs or product candidates that later prove to have greater commercial potential than the programs or product candidates that we do pursue. Our resource allocation decisions may cause us to fail to capitalize on viable commercial products or profitable market opportunities. Our spending on current and future research and development programs for product candidates may not yield any commercially viable products. Similarly, our decisions to delay or terminate drug development programs may also be incorrect and could cause us to miss valuable opportunities.

We may seek to establish commercial collaborations for our product candidates, and, if we are not able to establish them on commercially reasonable terms, we may have to alter our development and commercialization plans.

Our drug development programs and the potential commercialization of our product candidates will require substantial additional cash to fund expenses. We may decide to collaborate with other pharmaceutical and biotechnology companies for the development and potential commercialization of our product candidates. Collaborations are complex and time-consuming to negotiate and document. We may not be able to negotiate collaborations on a timely basis, on acceptable terms, or at all. If we are unable to do so, we may have to curtail the development of the product candidate for which we are seeking to collaborate, reduce or delay its development program or one or more of our other development programs, delay its potential commercialization or reduce the scope of any sales or marketing activities or increase our expenditures and undertake development or commercialization activities at our own expense.

We may not be successful in our efforts to identify, in-license or acquire, discover, develop or commercialize additional product candidates.

We may seek to identify, in-license or acquire, discover, develop and commercialize additional product candidates. We cannot assure you that our effort to in-license or acquire additional product candidates will be successful. Even if we are successful in in-licensing or acquiring additional product candidates, their requisite development activities may require substantial resources, and we cannot assure you that these development activities will result in regulatory approvals.

Our international operations may expose us to business, regulatory, political, operational, financial, pricing and reimbursement risks associated with doing business outside of the United States.

Our use of our international facilities subject us to U.S. and foreign governmental trade, import and export, and customs regulations and laws. Compliance with these regulations and laws is costly and exposes us to penalties for non-compliance. Doing business internationally potentially involves a number of risks, any of which could harm our ongoing international clinical operations and supply chain, as well as any future international expansion and operations and, consequently, our business, financial condition, prospects and results of operations.

Product liability lawsuits against us could cause us to incur substantial liabilities and to limit commercialization of any products that we may develop.

We face an inherent risk of product liability exposure related to the testing of our product candidates in human clinical trials and will face an even greater risk if we commercialize any resulting products. Product liability claims may be brought against us by subjects enrolled in our clinical trials, patients, or others using our products. Our clinical trial liability insurance coverage may not adequately cover all liabilities that we may incur.

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Our employees, contractors, vendors, principal investigators, consultants and future partners may engage in misconduct or other improper activities, including noncompliance with regulatory standards and requirements and insider trading.

We are exposed to the risk of fraud or other misconduct by our employees, contractors, vendors, principal investigators, consultants or future partners. Misconduct by these parties could include failures to comply with FDA regulations, to provide accurate information to the FDA, to comply with federal and state healthcare fraud and abuse laws and regulations, to report financial information or data timely, completely or accurately, or to disclose unauthorized activities to us. Most states also have statutes or regulations similar to these federal laws, which may apply to items such as pharmaceutical products and services reimbursed by private insurers. We and/or our future partners may be subject to administrative, civil and criminal sanctions for violations of any of these laws.

We depend on our information technology systems and those of our third-party collaborators, service providers, contractors or consultants. Our internal computer systems, or those of our third-party collaborators, service providers, contractors or consultants, may fail or suffer security breaches, disruptions, or incidents, which could result in a material disruption of our development programs or loss of data or compromise the privacy, security, integrity or confidentiality of sensitive information related to our business and have a material adverse effect on our reputation, business, financial condition or results of operations.

In the ordinary course of our business, we collect, store and transmit large amounts of confidential information, including intellectual property, proprietary business information and personal information. Our internal technology systems and infrastructure, and those of our current or future third-party collaborators, service providers, contractors and consultants are vulnerable to damage from computer viruses, unauthorized access or use resulting from malware, natural disasters, terrorism, war and telecommunication and electrical failures, denial-of-service attacks, cyber-attacks or cyber-intrusions over the Internet, hacking, phishing and other social engineering attacks, persons inside our organizations (including employees or contractors), loss or theft, or persons with access to systems inside our organization. While to our knowledge we have not experienced any material system failure, accident or security breach to date we have been subject to periodic phishing attempts. If a material system failure, accident or security breach were to occur and cause interruptions in our operations or the operations of third-party collaborators, service providers, contractors and consultants, it could result in a material disruption of our development programs and significant reputational, financial, legal, regulatory, business or operational harm.

To the extent that any real or perceived security breach affects our systems (or those of our third-party collaborators, service providers, contractors or consultants), or results in the loss of or accidental, unlawful or unauthorized access to, use of, release of, or other processing of personally identifiable information or damage to our data or applications or other data or applications relating to our technology or product candidates, or inappropriate disclosure of confidential or proprietary information, we could incur liabilities and the further development of our product candidates could be delayed. Any failure or perceived failure by us or any third-party collaborators, service providers, contractors or consultants to comply with our privacy, confidentiality, data security or similar obligations, or any data security incidents or other security breaches that result in the accidental, unlawful or unauthorized access to, use of, release of, processing of, or transfer of sensitive information, including personally identifiable information, may result in negative publicity, harm to our reputation, governmental investigations, enforcement actions, regulatory fines, litigation or public statements against us, could cause third parties to lose trust in us or could result in claims by third parties, including those that assert that we have breached our privacy, confidentiality, data security or similar obligations, any of which could have a material adverse effect on our reputation, business, financial condition or results of operations.

Risks Related to Regulatory Approvals

BIO89-100 has not received regulatory approval. If we are unable to obtain regulatory approvals to market BIO89-100 or any future product candidates, our business will be adversely affected.

We do not expect BIO89-100 or any future product candidate to be commercially available for several years, if at all. BIO89-100 is and any future product candidate will be subject to strict regulation by regulatory authorities in the United States and in other countries. We cannot market any product candidate until we have completed all necessary preclinical studies and clinical trials and have obtained the necessary regulatory approvals. We do not know whether regulatory agencies will grant approval for BIO89-100 or any future product candidate. Even if we complete preclinical studies and clinical trials successfully, we may not be able to obtain regulatory approvals or we may not receive approvals to make claims about our products that we believe to be necessary to effectively market our products. Data obtained from preclinical studies and clinical trials is subject to varying interpretations that could

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delay, limit or prevent regulatory approval, and failure to comply with regulatory requirements or inadequate manufacturing processes are examples of other problems that could prevent approval. The regulatory authorities in the United States and the EU have not approved any products for the treatment of NASH, and while there are recent guidelines issued by the FDA for the development of drugs for the treatment of NASH and a FDA surrogate endpoint table for drug approval that includes SHTG, it is unclear whether the requirements for approval will change in the future. Any such changes may require us to conduct new trials that could delay our timeframe and increase the costs of our programs related to BIO89-100 or any future product candidate for the treatment of NASH or SHTG. While the FDA has approved reduction in triglycerides levels as a surrogate endpoint for the full approval of drugs for the treatment of SHTG, it is unclear whether this endpoint will apply to any product candidates that we develop. If such endpoint is not deemed to apply to our product candidates, it would delay our development timeline and increase the costs of our programs for the treatment of SHTG. We have not had any discussions with the FDA regarding a surrogate endpoint or accelerated approval regulations. However, we currently expect that our SHTG program would be subject to smaller clinical trials and that we may expect a relatively quick er overall development timeline for this indication. These expectations are based on a published FDA surrogate endpoint table for drug approval that includes SHTG, as well as the development path followed by other companies that developed an SHTG therapy.

Even if we are able to obtain regulatory approvals for BIO89-100 or any future product candidate, if they exhibit harmful side effects after approval, our regulatory approvals could be revoked or otherwise negatively impacted, and we could be subject to costly and damaging product liability claims.

Even if we receive regulatory approval for BIO89-100 or any future product candidates, we will have tested them in only a small number of patients during our clinical trials. If our applications for marketing are approved and more patients begin to use our product, new risks and side effects associated with our products may be discovered. As a result, regulatory authorities may revoke their approvals. We have not had any discussions with the FDA regarding a surrogate endpoint or accelerated approval regulations. However, based on recent guidelines issued by the FDA for the development of drugs for the treatment of NASH, if BIO89-100 is approved by the FDA based on a surrogate endpoint pursuant to section 506(c) of the Federal Food, Drug, and Cosmetic Act and the accelerated approval regulations (21 C.F.R. part 314, subpart H; 21 C.F.R. part 601, subpart E), consistent with FDA guidance, we will be required to conduct additional clinical trials establishing clinical benefit on the ultimate outcome of NASH. If BIO89-100 is approved by the FDA for the treatment of SHTG based on an endpoint of the reduction of triglycerides, the FDA may still require a cardiovascular outcomes study as part of a post-marketing authorization commitment. Such a study would be time consuming and costly and we cannot guarantee that we will see positive results, which could result in the revocation of the approval. Additionally, we may be required to conduct additional clinical trials, make changes in labeling of our product, reformulate our product or make changes and obtain new approvals for our and our suppliers’ manufacturing facilities for BIO89-100 and any future product candidates. We might have to withdraw or recall our products from the marketplace. We may also experience a significant drop in the potential sales of our product if and when regulatory approvals for such product are revoked. As a result, we may experience harm to our reputation in the marketplace or become subject to lawsuits, including class actions. Any of these results could decrease or prevent any sales of our approved product or substantially increase the costs and expenses of commercializing and marketing our product.

The regulatory approval processes of the FDA and comparable foreign regulatory authorities are lengthy, time-consuming and inherently unpredictable. Our inability to obtain regulatory approval for BIO89-100 or any future product candidates would substantially harm our business.

Currently, we do not have any product candidates that have received regulatory approval. The time required to obtain approval from the FDA and comparable foreign regulatory authorities is unpredictable but typically takes many years following the commencement of preclinical studies and clinical trials and depends upon numerous factors, including the substantial discretion of the regulatory authorities. In addition, approval policies, regulations or the type and amount of clinical data necessary to gain approval may change during the course of a product candidate’s development and may vary among jurisdictions. It is possible that none of BIO89-100 or any future product candidates will ever obtain regulatory approval. BIO89-100 or any future product candidate could fail to receive regulatory approval from the FDA or comparable foreign regulatory authorities for many reasons, including those referenced in Part I, Item 1. “Business—Government Regulation and Product Approval”. If we were to obtain approval, regulatory authorities may approve any of our product candidates for fewer or more limited indications

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than we request, may grant approval contingent on the performance of costly post-marketing clinical trials or may approve a product candidate with a label that does not include the labeling claims necessary or desirable for the successful commercialization of th e product candidate.

Even if BIO89-100 or any future product candidate receives regulatory approval, it may still face future development and regulatory difficulties.

Even if we obtained regulatory approval for a product candidate, it would be subject to ongoing requirements by the FDA and comparable foreign regulatory authorities governing the manufacture, quality control, further development, labeling, packaging, storage, distribution, safety surveillance, import, export, advertising, promotion, recordkeeping and reporting of safety and other post-market information. In addition, manufacturers of drug products and their facilities are subject to continual review and periodic inspections by the FDA and other regulatory authorities for compliance with cGMP, regulations and standards. If we or a regulatory agency discover previously unknown problems with a product, such as adverse events of unanticipated severity or frequency, or problems with the facility where the product is manufactured, a regulatory agency may impose restrictions on that product, the manufacturing facility or us, including requiring recall or withdrawal of the product from the market or suspension of manufacturing. If we, our product candidates or the manufacturing facilities for our product candidates fail to comply with applicable regulatory requirements, or undesirable side effects caused by such products are identified, a regulatory agency may: issue safety alerts, Dear Healthcare Provider letters, press releases or other communications containing warnings about such product; mandate modifications to promotional materials or require us to provide corrective information to healthcare practitioners; require that we conduct post-marketing studies; require us to enter into a consent decree, which can include imposition of various fines, reimbursements for inspection costs, required due dates for specific actions and penalties for noncompliance; seek an injunction or impose civil or criminal penalties or monetary fines; suspend marketing of, withdraw regulatory approval of or recall such product; suspend any ongoing clinical studies; refuse to approve pending applications or supplements to applications filed by us; suspend or impose restrictions on operations, including costly new manufacturing requirements; or seize or detain products, refuse to permit the import or export of products or require us to initiate a product recall. The occurrence of any event or penalty described above may inhibit our ability to commercialize our products and generate product revenue.

Risks Relating to Intellectual Property

Our success depends upon our ability to obtain and maintain intellectual property protection for our products and technologies.

Our success will depend in significant part on our current or future licensors’, licensees’ or collaborators’ ability to establish and maintain adequate protection of our owned and licensed intellectual property covering the product candidates we plan to develop, and the ability to develop these product candidates and commercialize the products resulting therefrom, without infringing the intellectual property rights of others. In addition to taking other steps to protect our intellectual property, we hold issued patents, we have applied for patents, and we intend to continue to apply for, patents with claims covering our technologies, processes and product candidates when and where we deem it appropriate to do so. We have filed numerous patent applications both in the United States and in certain foreign jurisdictions to obtain patent rights to inventions we have discovered, with claims directed to compositions of matter, methods of use and other technologies relating to our programs. There can be no assurance that any of these patent applications will issue as patents or, for those applications that do mature into patents, that the claims of the patents will exclude others from making, using or selling our product candidates or products that compete with or are similar to our product candidates. In countries where we have not sought and do not seek patent protection, third parties may be able to manufacture and sell our product candidates without our permission, and we may not be able to stop them from doing so.

With respect to patent rights, we do not know whether any of the pending patent applications for any of our product candidates will result in the issuance of patents that effectively protect our technologies, processes and product candidates, or if any of our issued patents or our current or future licensors’, licensees’ or collaborators’ issued patents will effectively prevent others from commercializing competitive technologies, processes and products. We cannot be certain that we or our current or future licensors, licensees or collaborators were the first to make the inventions claimed in our owned or licensed patents or pending patent applications, or that we or our current or future licensors, licensees or collaborators were the first to file for patent protection of such inventions.

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Any changes we make to our BIO89-100 or any future product candidates to cause them to have what we view as more advantageous properties may not be covered by our existing patents and patent applications, and we may be required to file new applications and/or seek other forms of protection for any such altered product candidates. The patent landscape surrounding the technology underlying our product candidates is crowded, and there can be no assurance that we would be able to secure patent protection that would adequately cover an alternative to BIO89-100 or any future product candidates.

We and our current or future licensors, licensees or collaborators may not be able to prepare, file and prosecute all necessary or desirable patent applications at a reasonable cost or in a timely manner. It is also possible that we or our current or future licensors, licensees or collaborators will fail to identify patentable aspects of inventions made in the course of development and commercialization activities before it is too late to obtain patent protection for them. Moreover, in some circumstances, we may not have the right to control the preparation, filing and prosecution of patent applications, or to maintain or enforce the patents, covering technology that we license from or license to third parties and may be reliant on our current or future licensors, licensees or collaborators to perform these activities, which means that these patent applications may not be prosecuted, and these patents enforced, in a manner consistent with the best interests of our business. If our current or future licensors, licensees or collaborators fail to establish, maintain, protect or enforce such patents and other intellectual property rights, such rights may be reduced or eliminated. If our current or future licensors, licensees or collaborators are not fully cooperative or disagree with us as to the prosecution, maintenance or enforcement of any patent rights, such patent rights could be compromised.

Similar to the patent rights of other biotechnology companies, the scope, validity and enforceability of our owned and licensed patent rights generally are highly uncertain and involve complex legal and factual questions. The issuance of a patent is not conclusive as to its inventorship, scope, validity or enforceability, and our patents may be challenged in the courts or patent offices in the United States and abroad. In recent years, these areas have been the subject of much litigation in the industry. As a result, the issuance, scope, validity, enforceability and commercial value of our and our current or future licensors’, licensees’ or collaborators’ patent rights are highly uncertain. Our and our current or future licensors’, licensees’ or collaborators’ pending and future patent applications may not result in patents being issued that protect our technology or product candidates, or products resulting therefrom, in whole or in part, or that effectively prevent others from commercializing competitive technologies and products. The patent examination process may require us or our current or future licensors, licensees or collaborators to narrow the scope of the claims of pending and future patent applications, which would limit the scope of patent protection that is obtained, if any. Our and our current or future licensors’, licensees’ or collaborators’ patent applications cannot be enforced against third parties practicing the technology that is currently claimed in such applications unless and until a patent issues from such applications, and then only to the extent the claims that issue are broad enough to cover the technology being practiced by those third parties.

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 the resulting products are commercialized. As a result, our owned and in-licensed patents may not provide us with sufficient rights to exclude others from commercializing products similar or identical to ours. We expect to seek extensions of patent terms for our issued patents, where available. The applicable authorities, including the FDA in the United States, and any comparable foreign regulatory authorities, may not agree with our assessment of whether such extensions are available, and may refuse to grant extensions to our patents, or may grant more limited extensions than we request. In addition, we may not be granted an extension because of, for example, failing to apply within applicable deadlines, failing to apply prior to the expiration of relevant patents or otherwise failing to satisfy applicable requirements.

We may not be able to protect our intellectual property rights throughout the world.

The legal protection afforded to inventors and owners of intellectual property in countries outside of the United States may not be as protective or effective as that in the United States and we may, therefore, be unable to acquire and enforce intellectual property rights outside the United States to the same extent as in the United States. Whether filed in the United States or abroad, our patent applications may be challenged or may fail to result in issued patents. Filing, prosecuting, enforcing and defending patents on product candidates in all countries throughout the world would be prohibitively expensive, and our intellectual property rights in some countries outside the United States are less extensive than those in the United States. In addition, the laws of some foreign countries do not protect intellectual property rights to the same extent as federal and certain state laws in the United States.

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Consequently, we may not be able to prevent third parties from practicing our inventions in all countries outside the United States, or from selling or importing products made using our inventions in and into the United States or other jurisdictions. Competitors may use technologies in jurisdictions where we have not obtained patent protection to develop their own products and, further, may export otherwise infringing products to territories where we have patent protection, but enforcement is not as strong as that in the United States. These products may compete with BIO89-100 or any future product candidates and our patents or other intellectual property rights may not be effective or sufficient to prevent them from competing.

We rely on a license from Teva and a sublicense from ratiopharm to patents and know-how related to glycoPEGylation technology that are used in the development, manufacture and commercialization of BIO89-100. Any termination or loss of significant rights, including the right to glycoPEGylation technology, or breach, under these agreements or any future license agreement related to our product candidates, would materially and adversely affect our ability to continue the development and commercialization of the related product candidates.

In April 2018, we entered into an Asset Transfer and License Agreement (the “FGF21 Agreement”) with Teva under which we acquired certain patents, intellectual property and other assets relating to Teva’s glycoPEGylated FGF21 program, including BIO89-100. Under this agreement, we were granted a perpetual, non-exclusive (but exclusive as to BIO89-100), non-transferable, worldwide license to patents and know-how related to glycoPEGylation technology used in the development, manufacture and commercialization of BIO89-100 and products containing BIO89-100. The FGF21 Agreement also contains numerous covenants with which we must comply, including the utilization of commercially reasonable efforts to develop and ultimately commercialize BIO89-100, as well as certain reporting covenants and the obligation to make royalty payments, if and when BIO89-100 is approved for commercialization. Our failure to satisfy any of these covenants could result in the termination of the FGF21 Agreement. In addition, we entered into a Sublicense Agreement with ratiopharm (the “ratiopharm Sublicense”), under which we were granted a perpetual, exclusive, worldwide sublicense to patents and know-how related to glycoPEGylation technology used in the development, manufacture and commercialization of BIO89-100 and products containing BIO89-100. Termination of the FGF21 Agreement or the ratiopharm Sublicense will impact our rights under the intellectual property licensed to us by Teva and ratiopharm, respectively, including our license to glycoPEGylation technology, but will not affect our rights under the assets assigned to us.

Beyond this agreement, our commercial success will also depend upon our ability, and the ability of our licensors, to develop, manufacture, market and sell our product candidates and use our proprietary technologies without infringing the proprietary rights of third parties. A third party may hold intellectual property rights, including patent rights, that are important or necessary to the development of our product candidates. As a result, we may enter into additional license agreements in the future. If we fail to comply with the obligations under these agreements, including payment and diligence obligations, our licensors may have the right to terminate these agreements, in which event we may not be able to develop, manufacture, market or sell any product that is covered by these agreements or to engage in any other activities necessary to our business that require the freedom to operate afforded by the agreements, or we may face other penalties under the agreements.

We may be unable to obtain intellectual property rights or technology necessary to develop and commercialize BIO89-100 and any future product candidates.

The patent landscape around our programs is complex, and we are aware of several third-party patents and patent applications containing subject matter that might be relevant to BIO89-100. Depending on what claims ultimately issue from these patent applications, and how courts construe the issued patent claims, as well as depending on the ultimate formulation and method of use of BIO89-100 or any future product candidates, we may need to obtain a license to practice the technology claimed in such patents. There can be no assurance that such licenses will be available on commercially reasonable terms, or at all.

We may become involved in lawsuits or other proceedings to protect or enforce our intellectual property, which could be expensive, time-consuming and unsuccessful and have a material adverse effect on the success of our business.

Third parties may infringe our patents or misappropriate or otherwise violate our intellectual property rights. In the future, we may initiate legal proceedings to enforce or defend our intellectual property rights, to protect our

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trade secrets or to determine the validity or scope of intellectual property rights we own or control. Also, third parties may initiate legal proceedings against us to challenge the validity or scope of intellectual property rights we own, control or to which we have rights. An adverse result in any litigation proceeding could put one or more of our patents at risk of being invalidated, narrowed, held unenforceable or interpreted in such a manner that would not preclude third parties from entering the market with competing products.

Third-party pre-issuance submission of prior art to the USPTO, or opposition, derivation, revocation, reexamination, inter partes review or interference proceedings, or other pre-issuance or post-grant proceedings or other patent office proceedings or litigation in the United States or other jurisdictions provoked by third parties or brought by us, may be necessary to determine the inventorship, priority, patentability or validity of inventions with respect to our patents or patent applications. An unfavorable outcome could leave our technology or product candidates without patent protection, allow third parties to commercialize our technology or product candidates and compete directly with us, without payment to us, or could require us to obtain license rights from the prevailing party in order to be able to manufacture or commercialize our product candidates without infringing third-party patent rights. Our business could be harmed if the prevailing party in such a case does not offer us a license on commercially reasonable terms, or at all. Even if we obtain a license, it may be non-exclusive, thereby giving our competitors access to the same technologies licensed to us. In addition, if the breadth or strength of protection provided by our patents and patent applications is threatened, it could dissuade companies from collaborating with us to license, develop or commercialize current or future product candidates. Even if we successfully defend such litigation or proceeding, we may incur substantial costs and our defense may distract our management and other employees.

Furthermore, because of the substantial amount of discovery required in connection with intellectual property litigation, there is a risk that some of our confidential information could be compromised by disclosure during this type of litigation. In addition, many foreign jurisdictions have rules of discovery that are different than those in the United States and that may make defending or enforcing our patents extremely difficult. There could also be public announcements of the results of hearings, motions or other interim proceedings or developments. If securities analysts or investors perceive these results to be negative, it could have a material adverse effect on the price of shares of our common stock.

Third parties may initiate legal proceedings against us alleging that we infringe their intellectual property rights or we may initiate legal proceedings against third parties to challenge the validity or scope of intellectual property rights controlled by third parties.

Third parties may initiate legal proceedings against us alleging that we infringe their intellectual property rights or we may initiate legal proceedings against third parties to challenge the validity or scope of intellectual property rights controlled by third parties, including in oppositions, interferences, revocations, reexaminations, inter partes review or derivation proceedings before the USPTO or its counterparts in other jurisdictions. These proceedings can be expensive and time-consuming and many of our adversaries in these proceedings may have the ability to dedicate substantially greater resources to prosecuting these legal actions than we can. We could be found liable for monetary damages, including treble damages and attorneys’ fees, if we are found to have willfully infringed a patent of a third party. A finding of infringement could prevent us from commercializing our BIO89-100 or any future product candidates or force us to cease some of our business operations, which could materially harm our business.

Although we have reviewed certain third-party patents and patent filings that we believe may be relevant to our therapeutic candidates or products, we have not conducted a freedom-to-operate search or analysis for any of our therapeutic candidates or products, and we may not be aware of patents or pending or future patent applications that, if issued, would block us from commercializing our product candidates. Thus, we cannot guarantee that our product candidates, or our commercialization thereof, do not and will not infringe any third party’s intellectual property.

Risks Related to Ownership of Our Common Stock

The price of our common stock may be volatile, and you may lose all or part of your investment.

The market price of our common stock could fluctuate significantly, and you may not be able to resell your shares at or above the price you paid for your shares. Those fluctuations could be based on various factors in addition to those otherwise described in this prospectus, including those described in these “Risk Factors.” Any of

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these factors may result in large and sudden changes in the volume and trading price of our common stock. In the past, following periods of volatility in the market price of a company’s securities, stockholders have often instituted securities class action litigation against that company.

Sales of our common stock, or the perception that such sales may occur, could depress the price of our common stock.

Sales of a substantial number of shares of our common stock in the public market, or the perception that such sales may occur, could depress the market price of our common stock. Certain holders of shares of our common stock have rights, subject to certain conditions, to require us to file registration statements covering their shares or to include their shares in registration statements that we may file for ourselves or other stockholders. In addition, we have filed a registration statement registering under the Securities Act the shares of our common stock reserved for issuance under our 2019 Equity Incentive Plan, including shares issuable upon exercise of outstanding options. These shares can be freely sold in the public market upon issuance, subject to volume limitations applicable to affiliates. Further, as opportunities present themselves, we may enter into financing or similar arrangements in the future, including the issuance of debt or equity securities.

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

Existing stockholders could suffer dilution or be negatively affected by fixed payment obligations we may incur if we raise additional funds through the issuance of additional equity securities or debt or the Loan Agreement. Furthermore, these securities may have rights senior to those of our common stock and could contain covenants or protective rights that would restrict our operations and potentially impair our competitiveness, such as limitations on our ability to incur additional debt, limitations on our ability to acquire, sell or license intellectual property rights and other operating restrictions that could adversely impact our ability to conduct our business.

General Risk Factors

Our directors, executive officers and current holders of 5% or more of our capital stock have substantial control over our company, which could limit your ability to influence the outcome of matters subject to stockholder approval, including a change of control.

As of December 31, 2020, our executive officers, directors and other holders of 5% or more of our common stock beneficially owned a majority of our outstanding common stock. As a result, our executive officers, directors and other holders of 5% or more of our common stock, if they act, will be able to influence or control matters requiring approval by our stockholders, including the election of directors and the approval of mergers, acquisitions or other extraordinary transactions. In addition, our current directors, executive officers and other holders of 5% or more of our common stock, acting together, would have the ability to control the management and affairs of our company. They may also have interests that differ from yours and may vote in a way with which you disagree and that may be adverse to your interests. This concentration of ownership may have the effect of delaying, preventing or deterring a change of control of our company, could deprive our stockholders of an opportunity to receive a premium for their shares of our common stock as part of a sale of our company.

We previously identified material weaknesses in our internal control over financial reporting, which have been remediated. If we identify additional material weaknesses in the future or otherwise fail to maintain an effective system of internal controls, we may not be able to produce timely and accurate financial statements, and we or our independent registered public accounting firm may conclude that our internal control over financial reporting is not effective, which could adversely affect our investors’ confidence and our stock price.

As an emerging growth company under the JOBS Act, our management is required to report upon the effectiveness of our internal control over financial reporting under Section 404 of the Sarbanes-Oxley Act. Our independent registered public accounting firm is not required to formally attest to the effectiveness of our internal control over financial reporting until the date we are no longer an emerging growth company and reach accelerated filer status. 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. In addition, any testing by us conducted in connection with Section 404, or any subsequent testing by our independent registered public accounting firm, may reveal deficiencies in our internal controls over financial reporting that are deemed to be material weaknesses or that may require prospective or retroactive changes to our consolidated financial statements or identify other areas for further attention or improvement. As previously disclosed, in connection with our financial statement close process

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for 2018, we identified material weaknesses in the design and operating effectiveness of our internal control over financial rep orting. While w e have remediated such material weaknesses, w e cannot assure you that we have identified all material weaknesses or that there will not be additional material weaknesses or deficiencies that we will identify in the future.

Our amended and restated certificate of incorporation, amended and restated bylaws and Delaware law could prevent a third party from acquiring us (even if an acquisition would benefit our stockholders), may limit the ability of our stockholders to replace our management and limit the price that investors might be willing to pay for shares of our common stock.

Our amended and restated certificate of incorporation and our amended and restated bylaws could have the effect of making it more difficult for a third party to acquire, or of discouraging a third party from attempting to acquire, control of us. These provisions could delay or prevent a change in control of the company and could limit the price that investors might be willing to pay in the future for shares of our common stock. In addition, as a Delaware corporation, we are subject to the anti-takeover provisions of Section 203 of the Delaware General Corporation Law, which prohibits a Delaware corporation from engaging in a business combination specified in the statute with an interested stockholder (as defined in the statute) for a period of three years after the date of the transaction in which the person first becomes an interested stockholder, unless the business combination is approved in advance by a majority of the independent directors or by the holders of at least two-thirds of the outstanding disinterested shares. The application of Section 203 of the Delaware General Corporation Law could also have the effect of delaying or preventing a change of control of us.

Our amended and restated certificate of incorporation provides that the Court of Chancery of the State of Delaware and the federal district courts of the United States will be the exclusive forum for substantially all disputes between us and our stockholders, which could limit our stockholders’ ability to obtain a favorable judicial forum for disputes with us or our directors, officers or employees.

Our amended and restated certificate of incorporation provides that the Court of Chancery of the State of Delaware is the exclusive forum for certain actions or proceedings under Delaware statutory or common law. Our amended and restated certificate of incorporation provides further that the federal district courts of the United States will be the exclusive forum for resolving any complaint asserting a cause of action arising under the Securities Act. These choice of forum provisions may limit a stockholder’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. If a court were to find the choice of forum provision contained in our amended and restated certificate of incorporation to be inapplicable or unenforceable, we may incur additional costs associated with resolving such action in other jurisdictions.

Item 1B. Unresolved Staff Comments.

None.

Item 2. Properties.

We lease office space, which consists of approximately 1,600 square feet located at 6 Hamada Street, Herzliya, 4673340, Israel. This lease expires on April 30, 2021. We also lease office space at 142 Sansome Street, San Francisco, California 94104, which consists of approximately 3,600 square feet. This lease expires on January 14, 2022. We believe that our current spaces are adequate for our needs. We also believe we will be able to obtain additional space, as needed, on commercially reasonable terms.

Item 3. Legal Proceedings.

We are currently not a party to any material legal proceedings. From time to time, we may become involved in legal proceedings arising in the ordinary course of our business. Regardless of outcome, litigation can have an adverse impact on us due to defense and settlement costs, diversion of management resources, negative publicity, reputational harm and other factors, and there can be no assurances that favorable outcomes will be obtained.

Item 4. Mine Safety Disclosures.

Not applicable.

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PAR T II

Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.

Market Information

Our common stock is traded on The Nasdaq Global Market under the symbol “ETNB.”

As of March 1, 2021, there were approximately 12 stockholders of record of our common stock.

Dividend Policy

We have never declared or paid cash dividends on our capital stock and have no present intention to pay cash dividends on our common stock for the foreseeable future. Any determination to pay dividends to holders of our common stock will be at the discretion of our board of directors and will depend on many factors, including our financial condition, results of operations, liquidity, earnings, projected capital and other cash requirements, legal requirements, restrictions in the agreements governing any indebtedness we may enter into, business prospects and other factors that our board of directors deems relevant.

Use of Proceeds from our Initial Public Offering

On November 13, 2019, we completed our IPO, pursuant to which we issued and sold an aggregate of 6,100,390 shares of common stock (inclusive of 795,703 shares pursuant to the underwriters’ option to purchase additional shares) at the IPO price of $16.00 per share. The aggregate gross proceeds from our IPO were $97.6 million, and the net proceeds were $87.7 million after deducting underwriting discounts and commissions of $6.8 million and other offering expenses of $3.1 million. The offer and sale of the shares of common stock in the IPO were registered pursuant to registration statements on Form S-1 (File Nos. 333-234174 and 333-234617), which the SEC declared effective on November 8, 2019. No offering expenses were paid directly or indirectly to any of our directors or officers (or their associates) or persons owning 10% or more of any class of our equity securities or to any other affiliates. The underwriters for our IPO were BofA Securities, Inc., SVB Leerink LLC, RBC Capital Markets, LLC, and Oppenheimer & Co. Inc.

There has been no material change in the intended use of proceeds from our IPO as described in our final prospectus filed with the SEC pursuant to Rule 424(b)(4) on November 12, 2019.

Item 6. Selected Financial Data.

We are a smaller reporting company, as defined by Rule 12b-2 under the Securities and Exchange Act of 1934 and in Item 10(f)(1) of Regulation S-K, and are not required to provide the information under this item.

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Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

You should read the following discussion and analysis of our financial condition and results of operations together with our consolidated financial statements and related notes and other financial information included elsewhere in this Annual Report on Form 10-K. Some of the information contained in this discussion and analysis includes forward-looking statements that involve risks and uncertainties. Our actual results could differ materially from those described in or implied by these forward-looking statements. Factors that could cause or contribute to such differences include, but are not limited to, those identified below and those discussed in the section titled “Risk Factors” included elsewhere in this Annual Report on Form 10-K.

Overview

We are a clinical-stage biopharmaceutical company focused on the development and commercialization of innovative therapies for the treatment of liver and cardio-metabolic diseases. Our lead product candidate, BIO89-100, a specifically engineered glycoPEGylated analog of FGF21, is currently being developed for the treatment of NASH and for the treatment of SHTG. NASH is a severe form of NAFLD, characterized by inflammation and fibrosis in the liver that can progress to cirrhosis, liver failure, HCC and death. There are currently no approved products for the treatment of NASH. In September 2020, we announced positive topline data from the Phase 1b/2a trial of BIO89-100 in NASH. We plan to initiate a Phase 2b trial in NASH patients in the first half of 2021. In December 2020, we initiated a paired-biopsy open-label cohort as part of the Phase 1b/2a trial in NASH patients assessing histology endpoints with topline data anticipated by the end of 2021. SHTG is a condition identified by severely elevated levels of triglycerides (greater than or equal to 500 mg/dL), which is associated with an increased risk of NASH, cardiovascular events and acute pancreatitis. We initiated our Phase 2 trial (ENTRIGUE) in SHTG patients in the third quarter of 2020 and expect to report topline data in the second half of 2021.

We commenced operations in 2018 and have devoted substantially all of our resources to raising capital, acquiring our initial product candidate, identifying and developing BIO89-100, licensing certain related technology, conducting research and development activities (including preclinical studies and clinical trials) and providing general and administrative support for these operations. Prior to our initial public offering (“IPO”), we had funded our operations primarily from the issuance and sale of capital stock. In November 2019, we completed our IPO pursuant to which we issued 6,100,390 shares of our common stock at a price of $16.00 per share. We received net proceeds of $87.7 million from the IPO.

In July 2020, we completed an underwritten public offering of 3,047,040 shares of our common stock, including 397,440 shares sold pursuant to the underwriters’ exercise of their option to purchase additional shares, at a public offering price of $27.50 per share. We raised a total of $83.8 million in gross proceeds from the offering, or approximately $78.2 million in net proceeds after deducting underwriters’ discounts and commissions of $5.0 million and offering costs of approximately $0.6 million.

In September 2020, we completed an underwritten public offering of 3,025,000 shares of our common stock, at a public offering price of $28.00 per share. We raised a total of $84.7 million in gross proceeds from the offering, or approximately $79.5 million in net proceeds after deducting underwriting discounts and commissions of $4.6 million and offering costs of approximately $0.6 million.

As of December 31, 2020, our cash, cash equivalents and short-term investments totaled $204.6 million. Based on our current operating plan, we believe that our cash, cash equivalents and short-term investments together with the proceeds available under our term loan facility will be sufficient to meet our anticipated cash requirements through the second quarter of 2023.

We have incurred net losses since our inception. Our net losses for the years ended December 31, 2020 and 2019 were $49.5 million and $57.4 million, respectively. As of December 31, 2020, we had an accumulated deficit of $123.1 million. We expect to continue to incur significant expenses and increasing operating losses as we advance BIO89-100 and any future product candidates through clinical trials, seek regulatory approval for BIO89-100 and any future product candidates, expand our clinical, regulatory, quality, manufacturing and commercialization capabilities, protect our intellectual property, prepare for and, if approved, proceed to commercialization of BIO89-100 and any future product candidates, expand our general and administrative support functions, including hiring additional personnel, and incur additional costs associated with operating as a public

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company. Our net losses may fluctuate significantly from quarter-to-quarter and year-to-year, depending on the timing of our clinical trials and our expenditures on other research and development activities.

Impact of COVID-19 Pandemic

The ongoing COVID-19 pandemic has disrupted and may continue to disrupt our business and delay our preclinical and clinical programs and timelines. The extent to which the COVID-19 pandemic may impact our future operating results and financial condition is uncertain. We initiated our Phase 2 trial (ENTRIGUE) in SHTG patients in the third quarter of 2020 as well as a new paired-biopsy open-label histology cohort as part of the Phase 1b/2a trial in the fourth quarter of 2020. The COVID-19 surge observed late in the fourth quarter of 2020 and the first quarter of 2021 has impacted enrollment in these studies. We plan to initiate a Phase 2b trial in NASH patients in the first half of 2021. We do not yet know the full extent of potential delays, which could prevent or delay us from obtaining approval for BIO89-100. For more information regarding risks related to the ongoing COVID-19 pandemic, please see the risk factor entitled “The ongoing COVID-19 pandemic has resulted and may in the future result in significant disruptions to our clinical trials or other business operations, which could have a material adverse effect on our business,” in Part I. Item 1A of this Annual Report on Form 10-K. To the extent the ongoing COVID-19 pandemic adversely affects our business and financial results, it may also have the effect of heightening many of the other risks set forth under “Risk Factors” in this Annual Report on Form 10-K.

Components of Results of Operations

Research and Development Expenses

Research and development expenses consist primarily of costs incurred for the development of our lead product candidate, BIO89-100. Our research and development expenses consist primarily of external costs related to preclinical and clinical development, including costs related to acquiring patents and intellectual property, expenses incurred under license agreements and agreements with contract research organizations and consultants, costs related to acquiring and manufacturing clinical trial materials, including under agreements with contract manufacturing organizations and other vendors, costs related to the preparation of regulatory submissions and expenses related to laboratory supplies and services, as well as personnel costs. Personnel costs consist of salaries, employee benefits and share-based compensation for individuals involved in research and development efforts.

We expense all research and development expenses in the periods in which they are incurred. We accrue for costs incurred as the services are being provided by monitoring the status of specific activities and the invoices received from our external service providers. We adjust our accrued expenses as actual costs become known.

Payments associated with licensing agreements to acquire licenses to develop, use, manufacture and commercialize products that have not reached technological feasibility and do not have alternate commercial use are expensed as incurred. Where contingent milestone payments are due to third parties under research and development arrangements or license agreements, the milestone payment obligations are expensed when the milestone results are probable and estimable, which is generally upon achievement of milestones.

We expect our research and development expenses to increase substantially for the foreseeable future as we continue the development of BIO89-100 and continue to invest in research and development activities. The process of conducting the necessary clinical research to obtain regulatory approval is costly and time consuming, and the successful development of BIO89-100 and any future product candidates is highly uncertain. To the extent that BIO89-100 continues to advance into larger and later stage clinical trials, our expenses will increase substantially and may become more variable. The actual probability of success for BIO89-100 or any future product candidate may be affected by a variety of factors, including the safety and efficacy of our product candidates, investment in our clinical programs, manufacturing capability and competition with other products. As a result, we are unable to determine the timing of initiation, duration and completion costs of our research and development efforts or when and to what extent we will generate revenue from the commercialization and sale of BIO89-100 or any future product candidate.

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General and Administrative Expenses

General and administrative expenses consist primarily of personnel costs, expenses for outside professional services, including legal, human resource, audit and accounting services, consulting costs and allocated facilities costs. Personnel and related costs consist of salaries, benefits and share-based compensation for personnel in executive, finance and other administrative functions. Facilities costs consist of rent and maintenance of facilities. We expect our general and administrative expenses to increase for the foreseeable future as we increase the size of our administrative function to support the growth of our business and support our continued research and development activities.

Other Expenses, Net

Other expenses, net primarily consists of the revaluation of our convertible preferred stock liability, prior to extinguishment upon our IPO.

Results of Operations

Years Ended December 31, 2020 and 2019

The following table summarizes our results of operations for the periods presented (in thousands):

|  | Year Ended December 31, |  |  |  |  |
|  | 2020 |  |  | 2019 |  |  | Change |
Operating expenses: |  |  |  |  |  |  |  |  |  |  |  |
Research and development |  | $ | 36,199 |  |  | $ | 21,346 |  |  | $ | 14,853 |
General and administrative |  |  | 13,156 |  |  |  | 5,294 |  |  |  | 7,862 |
Total operating expenses |  |  | 49,355 |  |  |  | 26,640 |  |  |  | 22,715 |
Loss from operations |  |  | (49,355 | ) |  |  | (26,640 | ) |  |  | (22,715 | )
Other expenses, net |  |  | (203 | ) |  |  | (30,562 | ) |  |  | 30,359 |
Income tax benefit (expense) |  |  | 59 |  |  |  | (218 | ) |  |  | 277 |
Net loss |  | $ | (49,499 | ) |  | $ | (57,420 | ) |  | $ | 7,921 |

Research and Development Expenses

The following table summarizes the period-over-period changes in research and development expenses for the periods indicated (in thousands):

|  | Year Ended December 31, |  |  |  |  |
|  | 2020 |  |  | 2019 |  |  | Change |
Clinical development |  | $ | 13,613 |  |  | $ | 5,453 |  |  | $ | 8,160 |
Contract manufacturing |  |  | 12,995 |  |  |  | 7,257 |  |  |  | 5,738 |
Preclinical costs |  |  | 1,684 |  |  |  | 4,072 |  |  |  | (2,388 | )
Personnel-related expenses |  |  | 6,841 |  |  |  | 3,688 |  |  |  | 3,153 |
Other expenses |  |  | 1,066 |  |  |  | 876 |  |  |  | 190 |
Total research and development expenses |  | $ | 36,199 |  |  | $ | 21,346 |  |  | $ | 14,853 |

Research and development expenses increased by $14.9 million, or 70%, to $36.2 million in 2020 compared to $21.3 million in 2019. The change was primarily due to an increase of $8.2 million in clinical development costs as a result of our ongoing Phase 1b/2a study in NASH and the initiation of our Phase 2 trial (ENTRIGUE) in SHTG patients in the third quarter of 2020, as well as our new paired-biopsy histology cohort as part of the Phase 1b/2a trial in the fourth quarter of 2020, an increase of $5.7 million in contract manufacturing costs as a result of the manufacture of additional supplies for our ongoing clinical trials, including our clinical trials initiated in the second half of 2020 and an increase of $3.2 million in personnel-related costs, including share-based compensation, due to higher headcount. The increases were partially offset by a decrease of $2.4 million in preclinical costs. The timing of such preclinical costs is dependent upon the status and stage of our clinical trials.

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General and Administrative Expenses

General and administrative expenses increased by $7.9 million, or 149%, to $13.2 million in 2020 compared to $5.3 million in 2019. The change was primarily due to an increase of $4.2 million in personnel-related costs, including share-based compensation, driven by higher headcount, an increase of $2.5 million in professional services including legal and accounting consulting service fees and an increase of $1.4 million in insurance related costs. The increases were partially offset by a decrease of $0.3 million in travel related expenses.

Other Expenses, Net

Other expenses, net decreased by $30.4 million to $0.2 million in 2020 compared to $30.6 million in 2019. In 2019, other expenses, net consisted primarily of the revaluation of our convertible preferred stock liability which was extinguished upon our IPO in November 2019.

Liquidity and Capital Resources

To date, we have incurred significant net losses and negative cash flows from operations. As of December 31, 2020, we had available cash, cash equivalents and short-term investments of $204.6 million and an accumulated deficit of $123.1 million. Prior to our IPO, we funded our operations from the issuance and sale of capital stock. In connection with our IPO, we issued and sold an aggregate of 6,100,390 shares of common stock at a price of $16.00 per share. We received proceeds of $87.7 million, net of underwriting discounts and commissions and estimated offering costs.

In April 2020, we entered into a secured term loan facility with an aggregate committed principal amount of up to $15.0 million. As of December 31, 2020, we had not drawn any amount under the term loan facility.

In July 2020, we completed an underwritten public offering of 3,047,040 shares of our common stock, including 397,440 shares sold pursuant to the underwriters’ exercise of their option to purchase additional shares, at a public offering price of $27.50 per share. Upon completion of the offering, we received gross proceeds of $83.8 million, before deducting underwriting discounts and commissions and offering expenses.

In September 2020, we completed an underwritten public offering of 3,025,000 shares of our common stock, at a public offering price of $28.00 per share. Upon completion of the offering, we received gross proceeds of $84.7 million, before deducting underwriting discounts and commissions and offering expenses.

Our primary use of cash is to fund operating expenses, which consist primarily of research and development expenditures related to our lead product candidate, BIO89-100. We plan to increase our research and development expenses substantially for the foreseeable future as we continue the clinical development of our current and future product candidates. At this time, due to the inherently unpredictable nature of clinical development, we cannot reasonably estimate the costs we will incur and the timelines that will be required to complete development, obtain marketing approval, and commercialize our current product candidate or any future product candidates. For the same reasons, we are also unable to predict when, if ever, we will generate revenue from product sales or our current or any future license agreements which we may enter into or whether, or when, if ever, we may achieve profitability. Clinical and preclinical development timelines, the probability of success, and development costs can differ materially from expectations. In addition, we cannot forecast the timing and amounts of milestone, royalty and other revenue from licensing activities, which future product candidates may be subject to future collaborations, when such arrangements will be secured, if at all, and to what degree such arrangements would affect our development plans and capital requirements.

Based on our research and development plans, we expect that our existing cash, cash equivalents and short-term investments together with the proceeds available under our term loan facility, will be sufficient to fund our operations through the second quarter of 2023. However, our operating plans and other demands on our cash resources may change as a result of many factors, and we may seek additional funds sooner than planned. There can be no assurance that we will be successful in acquiring additional funding at levels sufficient to fund our operations or on terms favorable to us.

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Our future funding requirements will depend on many factors, including the following:

| • | the progress, timing, scope, results and costs of our clinical trials of BIO89-100 and preclinical studies or clinical trials of other potential product candidates we may choose to pursue in the future, including the ability to enroll patients in a timely manner for our clinical trials;

| • | the costs and timing of obtaining clinical and commercial supplies and validating the commercial manufacturing process for BIO89-100 and any other product candidates we may identify and develop;

| • | the cost, timing and outcomes of regulatory approvals;

| • | the timing and amount of any milestone, royalty or other payments we are required to make pursuant to current or any future collaboration or license agreements;

| • | costs of acquiring or in-licensing other product candidates and technologies;

| • | the terms and timing of establishing and maintaining collaborations, licenses and other similar arrangements;

| • | the costs associated with attracting, hiring and retaining additional qualified personnel as our business grows;

| • | our efforts to enhance operational systems and hire additional personnel to satisfy our obligations as a public company, including enhanced internal controls over financial reporting; and

| • | the cost of preparing, filing, prosecuting, defending and enforcing any patent claims and other intellectual property rights.

We expect to continue to generate substantial operating losses for the foreseeable future as we expand our research and development activities. We will continue to fund our operations primarily through utilization of our current financial resources and through additional raises of capital to advance our current product candidate through clinical development, to develop, acquire or in-license other potential product candidates and to fund operations for the foreseeable future. However, there is no assurance that such funding will be available to us or that it will be obtained on terms favorable to us or will provide us with sufficient funds to meet our objectives. Any failure to raise capital as and when needed could have a negative impact on our financial condition and on our ability to pursue our business plans and strategies.

To the extent that we raise additional capital through partnerships or licensing arrangements with third parties, we may have to relinquish valuable rights to our product candidates, future revenue streams or research programs or to grant licenses on terms that may not be favorable to us. If we raise additional capital through public or private equity offerings, the ownership interest of our then-existing stockholders will be diluted, and the terms of these securities may include liquidation or other preferences that adversely affect our stockholders’ rights. If we raise additional capital through debt financing, we may be subject to covenants limiting or restricting our ability to take specific actions, such as incurring additional debt, making capital expenditures or declaring dividends. If we are unable to obtain adequate financing when needed, we may have to delay, reduce the scope of or suspend one or more of our clinical trials or preclinical studies, research and development programs or commercialization efforts or grant rights to develop and market our product candidates even if we would otherwise prefer to develop and market such product candidates ourselves.

Cash Flows

The following table summarizes our cash flows for the periods presented (in thousands):

|  | Year Ended December 31, |
|  | 2020 |  |  | 2019 |
Net cash used in operating activities |  | $ | (46,244 | ) |  | $ | (25,460 | )
Net cash used in investing activities |  |  | (106,832 | ) |  |  | (139 | )
Net cash provided by financing activities |  |  | 157,924 |  |  |  | 107,702 |
Net increase in cash and cash equivalents, and restricted cash |  | $ | 4,848 |  |  | $ | 82,103 |

57

Net Cash Used in Operating Activities

During the year ended December 31, 2020, net cash used in operating activities was $46.2 million, which consisted of a net loss of $49.5 million and a net change of $1.0 million in our net operating assets and liabilities, partially offset by non-cash charges of $4.3 million. The change in our operating assets and liabilities was primarily due to a $3.6 million increase in prepaid and other current assets due to the timing of payments as well as increased scale of operations and the initiation of clinical trials in the second half of 2020, offset in part by a $2.6 million increase in accounts payable and accrued expenses as we grew our operations. The non-cash charges are primarily comprised of $3.8 million in share-based compensation, $0.3 million in amortization of premium on available-for-sale securities and $0.2 million in amortization of debt issuance costs.

During the year ended December 31, 2019, net cash used in operating activities was $25.5 million, which consisted of a net loss of $57.4 million, partially offset by non-cash charges of $31.0 million and a net change of $0.9 million in our net operating assets and liabilities. The non-cash charges are primarily comprised of the revaluation of our convertible preferred stock liability of $30.6 million and $0.4 million in share-based compensation. The change in our operating assets and liabilities was primarily due to a $2.9 million increase in accounts payable and accrued expenses as we grew our operations, offset in part by a $2.0 million increase in other current assets and other assets due to the timing of payments.

Net Cash Used in Investing Activities

During the year ended December 31, 2020, net cash used in investing activities was $106.8 million, which consisted of $118.9 million in purchases of available-for-sale securities and $0.1 million in purchases of property and equipment, offset in part by $12.2 million in proceeds from maturities of available-for-sale securities.

During the year ended December 31, 2019, net cash used in investing activities consisted of purchases of property and equipment.

Net Cash Provided by Financing Activities

During the year ended December 31, 2020 net cash provided by financing activities was $157.9 million, which consisted of $157.7 million in net proceeds from the issuance of common stock from our public offerings and $0.4 million in proceeds from the issuance of common stock upon exercise of stock options and employee share purchase plan (“ESPP”) purchases, offset in part by a $0.2 million payment of debt issuance costs.

During the year ended December 31, 2019 net cash provided by financing activities was $107.7 million, which consisted of $87.7 million in net proceeds from our initial public offering and $20.0 million in net proceeds from the issuance and sale of our convertible preferred stock.

Contractual Obligations and Other Commitments

We are a smaller reporting company, as defined by Rule 12b-2 under the Securities and Exchange Act of 1934 and in Item 10(f)(1) of Regulation S-K, and are not required to provide the information under this item.

Off-Balance Sheet Arrangements

We have not entered into any off-balance sheet arrangements, as defined in the rules and regulations of the SEC, and do not have any holdings in variable interest entities.

Critical Accounting Polices and Estimates

Our management’s discussion and analysis of our financial condition and results of operations is based on our consolidated financial statements, which have been prepared in accordance with United States generally accepted accounting principles (“GAAP”). The preparation of these consolidated financial statements requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent

58

assets and liabilities as of the date of the consolidated financial statements, as well as the reported expenses incurred during the reporting periods. Our estimates are based on our historical experience and on various other factors that we believe are reasonable under the circumstances, the results of which form the basis for making judgments about the carrying value of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions. We believe that the accounting policies discussed below are critical to understanding our historical and future performance, as these policies relate to the more significant areas involving management’s judgments and estimate s.

While our significant accounting policies are described in the notes to our consolidated financial statements included elsewhere in this Annual Report on Form 10-K, we believe that the following critical accounting policies are most important to understanding and evaluating our reported financial results.

Accrued Research and Development Expenses

We record accrued expenses for estimated preclinical and clinical trial and research expenses related to the services performed but not yet invoiced pursuant to contracts with research institutions, contract research organizations and clinical manufacturing organizations that conduct and manage preclinical studies, and clinical trials, and research services on our behalf. Payments for these services are based on the terms of individual agreements and payment timing may differ significantly from the period in which the services were performed. Our estimates are based on factors such as the work completed, including the level of patient enrollment. We monitor patient enrollment levels and related activity to the extent reasonably possible and make judgments and estimates in determining the accrued balance in each reporting period. Our estimates of accrued expenses are based on the facts and circumstances known at the time. If we underestimate or overestimate the level of services performed or the costs of these services, our actual expenses could differ from our estimates. As actual costs become known, we adjust our accrued expenses. To date, we have not experienced significant changes in our estimates of preclinical studies and clinical trial accruals.

Share-Based Compensation

We measure compensation expense related to share-based awards granted to employees, directors, and non-employee service providers, including stock options, based on the estimated fair value. We estimate the fair value of the awards on the date of grant, and the resulting share-based compensation, using the Black-Scholes option-pricing model. The grant date fair value of the share-based awards, which have graded vesting, is recognized as an expense using the straight-line method over the requisite service period of each award, which is generally the vesting period of the respective awards. We recognize forfeitures as they occur.

We use the Black-Scholes option-pricing model to estimate the fair value of stock option awards that requires the use of subjective assumptions to determine the fair value of share-based awards. These assumptions include:

| • | Expected volatility—Since we have limited trading history for our common stock due to our short trading history, the expected volatility is estimated based on the volatility of comparable publicly traded biotechnology companies during the equivalent period of the calculated expected term of the options granted. The comparable companies were chosen based on their similar size, stage in the life cycle or area of specialty.

| • | Expected term—The expected term of options granted to employees and directors is determined using the “simplified” method. Under this approach, the expected term is presumed to be the midpoint between the weighted-average vesting term and the contractual term of the option. The simplified method makes the assumption that the employee will exercise share options evenly over the period when the share options are vested and ending on the date when the share options would expire. The expected option term for options granted to non-employees is estimated on a grant-by-grant basis.

| • | Risk-free interest rate—The risk-free interest rate is based on the U.S. Treasury zero coupon bonds in effect on the grant date for periods with an equivalent expected term as the option.

| • | Expected dividend—We have never paid dividends and have no foreseeable plans to pay dividends on our shares of common stock. Therefore, we use an expected dividend of zero.

59

We will continue to use judgment in evaluating the expected volatility and expected term utilized for our share-based compensation calculations on a prospective basis.

Recent Accounting Pronouncements

See Note 2 to our consolidated financial statements appearing under Part II Item 8 for more information about recent accounting pronouncements, the timing of their adoption, and our assessment, to the extent we have made one yet, of their potential impact on our financial condition of results of operations.

JOBS Act Accounting Election

We are an emerging growth company, as defined in the JOBS Act. Under the JOBS Act, emerging growth companies can delay adopting new or revised accounting standards issued subsequent to the enactment of the JOBS Act until such time as those standards apply to private companies.

We have elected to use this extended transition period to enable us to comply with new or revised accounting standards that have different effective dates for public and private companies until the earlier of the date we (i) are no longer an emerging growth company or (ii) affirmatively and irrevocably opt out of the extended transition period provided in the JOBS Act. As a result, our consolidated financial statements and our interim consolidated financial statements may not be comparable to companies that comply with new or revised accounting pronouncements.

Item 7A. Quantitative and Qualitative Disclosures About Market Risk.

We are a smaller reporting company, as defined by Rule 12b-2 under the Securities and Exchange Act of 1934 and in Item 10(f)(1) of Regulation S-K, and are not required to provide the information under this item.

60

Item 8. Financial Statements and Supplementary Data.

89BIO, INC.

INDEX TO CONSOLIDATED FINANCIAL STATEMENTS

| Page
Reports of Independent Registered Public Accounting Firms | 62
Financial Statements: |
Consolidated Balance Sheets | 64
Consolidated Statements of Operations and Comprehensive Loss | 65
Consolidated Statements of Stockholders’ Equity | 66
Consolidated Statements of Cash Flows | 67
Notes to Consolidated Financial Statements | 68

61

Report of Independent Registered Public Accounting Firm

To the Stockholders and the Board of Directors
89bio, Inc.:

Opinion on the Consolidated Financial Statements

We have audited the accompanying consolidated balance sheet of 89bio, Inc. and subsidiaries (the Company) as of December 31, 2020, the related consolidated statements of operations and comprehensive loss, stockholders’ equity, and cash flows for the year ended December 31, 2020, and the related notes (collectively, 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, 2020, and the results of its operations and its cash flows for the year ended December 31, 2020, in conformity with U.S. generally accepted accounting principles.

Basis for Opinion

These consolidated financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on these consolidated financial statements based on our audit. 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 audit 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. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audit, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.

Our audit 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 audit 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 audit provides a reasonable basis for our opinion.

/s/ KPMG LLP

We have served as the Company’s auditor since 2020.

San Francisco, California
March 24, 2021

62

Report of Independent Registered Public Accounting Firm

To the stockholders and the Board of Directors of 89bio, Inc.

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheet of 89bio, Inc. and subsidiaries (the “Company”) as of December 31, 2019, the related consolidated statements of operations and comprehensive loss, stockholders’ equity, and cash flow, for the year ended December 31, 2019, and the related notes (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2019, and the results of its operations and its cash flows for the year ended December 31, 2019, in conformity with accounting principles generally accepted in the United States of America.

Basis for Opinion

These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s financial statements based on our audit. We are a public accounting firm registered with the 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 audit 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 financial statements are free of material misstatement, whether due to error or fraud. Our audit included performing procedures to assess the risks of material misstatement of the 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 financial statements. Our audit also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audit provides a reasonable basis for our opinion.

/s/ DELOITTE & TOUCHE LLP

San Francisco, California

March 18, 2020

We began serving as the Company’s auditor in 2019. In 2020, we became the predecessor auditor.

63

89bio, Inc.

Consolidated Balance Sheets

(in thousands, except share and per share amounts)

|  | As of December 31, |
|  | 2020 |  |  | 2019 |
Assets |  |  |  |  |  |  |  |
Current assets: |  |  |  |  |  |  |  |
Cash and cash equivalents |  | $ | 98,183 |  |  | $ | 93,335 |
Restricted cash |  |  | 25 |  |  |  | 25 |
Short-term investments |  |  | 106,446 |  |  |  | — |
Prepaid and other current assets |  |  | 5,548 |  |  |  | 1,966 |
Total current assets |  |  | 210,202 |  |  |  | 95,326 |
Property and equipment, net |  |  | 166 |  |  |  | 155 |
Other assets |  |  | 706 |  |  |  | 72 |
Total assets |  | $ | 211,074 |  |  | $ | 95,553 |
Liabilities and stockholders’ equity |  |  |  |  |  |  |  |
Current liabilities: |  |  |  |  |  |  |  |
Accounts payable |  | $ | 2,065 |  |  | $ | 989 |
Accrued expenses |  |  | 6,048 |  |  |  | 4,620 |
Total current liabilities |  |  | 8,113 |  |  |  | 5,609 |
Commitments and contingencies (Note 5) |  |  |  |  |  |  |  |
Stockholders’ equity: |  |  |  |  |  |  |  |
Preferred stock, $0.001 par value, 10,000,000 shares authorized as of December 31, 2020 and 2019, respectively, no shares issued and outstanding as of December 31, 2020 and 2019, respectively |  |  | — |  |  |  | — |
Common stock, $0.001 par value, 100,000,000 shares authorized as of December 31, 2020 and 2019, respectively; 19,931,660 and 13,788,982 shares issued and outstanding as of December 31, 2020 and 2019, respectively |  |  | 20 |  |  |  | 14 |
Additional paid-in capital |  |  | 326,046 |  |  |  | 163,526 |
Accumulated other comprehensive loss |  |  | (10 | ) |  |  | — |
Accumulated deficit |  |  | (123,095 | ) |  |  | (73,596 | )
Total stockholders’ equity |  |  | 202,961 |  |  |  | 89,944 |
Total liabilities and stockholders’ equity |  | $ | 211,074 |  |  | $ | 95,553 |

The accompanying notes are an integral part of these consolidated financial statements.

64

89bio, Inc.

Consolidated Statements of Operations and Comprehensive Loss

(In thousands, except share and per share amounts)

|  | Year Ended December 31, |
|  | 2020 |  |  | 2019 |
Operating expenses: |  |  |  |  |  |  |  |
Research and development |  | $ | 36,199 |  |  | $ | 21,346 |
General and administrative |  |  | 13,156 |  |  |  | 5,294 |
Total operating expenses |  |  | 49,355 |  |  |  | 26,640 |
Loss from operations |  |  | (49,355 | ) |  |  | (26,640 | )
Other expenses, net |  |  | (203 | ) |  |  | (30,562 | )
Net loss before income tax |  |  | (49,558 | ) |  |  | (57,202 | )
Income tax benefit (expense) |  |  | 59 |  |  |  | (218 | )
Net loss |  | $ | (49,499 | ) |  | $ | (57,420 | )
Other comprehensive income (loss): |  |  |  |  |  |  |  |
Unrealized gain on available-for-sale securities |  |  | 8 |  |  |  | — |
Foreign currency translation adjustments |  |  | (18 | ) |  |  | — |
Total other comprehensive loss |  | $ | (10 | ) |  | $ | — |
Comprehensive loss |  | $ | (49,509 | ) |  | $ | (57,420 | )
Net loss per share, basic and diluted |  | $ | (3.08 | ) |  | $ | (24.49 | )
Weighted-average shares used to compute net loss per share, basic and diluted |  |  | 16,087,785 |  |  |  | 2,344,191 |

The accompanying notes are an integral part of these consolidated financial statements.

65

89bio, Inc.

Consolidated Statements of Stockholders’ Equity

(In thousands, except share amounts)

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Accumulated |  |  |  |  |  |  |  |  |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Additional |  |  | Other |  |  |  |  |  |  | Total |
|  | Convertible Preferred Stock |  |  |  | Common Stock |  |  | Paid-in |  |  | Comprehensive |  |  | Accumulated |  |  | Stockholders’ |
|  | Shares |  |  | Amounts |  |  |  | Shares |  |  | Amounts |  |  | Capital |  |  | Loss |  |  | Deficit |  |  | Equity |
Balance as of December 31, 2018 |  |  | 24,000,000 |  |  | $ | 23,073 |  |  |  |  | 611,226 |  |  | $ | 1 |  |  | $ | 118 |  |  | $ | — |  |  | $ | (16,176 | ) |  | $ | (16,057 | )
Issuance of convertible preferred stock, net of issuance costs of $0 and settlement of the convertible preferred stock liability of $6,673 |  |  | 20,000,000 |  |  |  | 26,673 |  |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Conversion of convertible preferred stock into common stock upon completion of initial public offering |  |  | (44,000,000 | ) |  |  | (49,746 | ) |  |  |  | 7,077,366 |  |  |  | 7 |  |  |  | 49,739 |  |  |  | — |  |  |  | — |  |  |  | 49,746 |
Issuance of common stock in connection with initial public offering, net of issuance costs of $3,083 |  |  | — |  |  |  | — |  |  |  |  | 6,100,390 |  |  |  | 6 |  |  |  | 87,685 |  |  |  | — |  |  |  | — |  |  |  | 87,691 |
Capital contribution related to extinguishment of convertible preferred stock liability |  |  | — |  |  |  | — |  |  |  |  | — |  |  |  | — |  |  |  | 25,595 |  |  |  | — |  |  |  | — |  |  |  | 25,595 |
Share-based compensation |  |  | — |  |  |  | — |  |  |  |  | — |  |  |  | — |  |  |  | 389 |  |  |  | — |  |  |  | — |  |  |  | 389 |
Net loss |  |  | — |  |  |  | — |  |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (57,420 | ) |  |  | (57,420 | )
Balance as of December 31, 2019 |  |  | — |  |  |  | — |  |  |  |  | 13,788,982 |  |  |  | 14 |  |  |  | 163,526 |  |  |  | — |  |  |  | (73,596 | ) |  |  | 89,944 |
Issuance of common stock upon public offerings, net of issuance costs of $1,208 |  |  | — |  |  |  | — |  |  |  |  | 6,072,040 |  |  |  | 6 |  |  |  | 157,674 |  |  |  | — |  |  |  | — |  |  |  | 157,680 |
Issuance of common stock upon exercise of stock options |  |  | — |  |  |  | — |  |  |  |  | 63,366 |  |  |  | — |  |  |  | 271 |  |  |  | — |  |  |  | — |  |  |  | 271 |
Issuance of common stock upon ESPP purchase |  |  | — |  |  |  | — |  |  |  |  | 7,272 |  |  |  | — |  |  |  | 134 |  |  |  | — |  |  |  | — |  |  |  | 134 |
Issuance of common stock warrant in connection with debt financing |  |  | — |  |  |  | — |  |  |  |  | — |  |  |  | — |  |  |  | 634 |  |  |  | — |  |  |  | — |  |  |  | 634 |
Share-based compensation |  |  | — |  |  |  | — |  |  |  |  | — |  |  |  | — |  |  |  | 3,807 |  |  |  | — |  |  |  | — |  |  |  | 3,807 |
Net loss |  |  | — |  |  |  | — |  |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (49,499 | ) |  |  | (49,499 | )
Other comprehensive loss |  |  | — |  |  |  | — |  |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (10 | ) |  |  | — |  |  |  | (10 | )
Balance as of December 31, 2020 |  |  | — |  |  | $ | — |  |  |  |  | 19,931,660 |  |  | $ | 20 |  |  | $ | 326,046 |  |  | $ | (10 | ) |  | $ | (123,095 | ) |  | $ | 202,961 |

The accompanying notes are an integral part of these consolidated financial statements.

66

89bio, Inc.

Consolidated Statements of Cash Flows

(In thousands)

|  | Year Ended December 31, |
|  | 2020 |  |  | 2019 |
Cash flows from operating activities: |  |  |  |  |  |  |  |
Net loss |  | $ | (49,499 | ) |  | $ | (57,420 | )
Adjustments to reconcile net loss to net cash used in operating activities: |  |  |  |  |  |  |  |
Depreciation |  |  | 60 |  |  |  | 17 |
Share-based compensation |  |  | 3,807 |  |  |  | 389 |
Deferred tax assets |  |  | (69 | ) |  |  | 20 |
Revaluation of convertible preferred stock liability |  |  | — |  |  |  | 30,597 |
Amortization of premium on available-for-sale securities |  |  | 268 |  |  |  | — |
Amortization of debt issuance costs |  |  | 230 |  |  |  | — |
Changes in operating assets and liabilities: |  |  |  |  |  |  |  |
Prepaids and other current assets |  |  | (3,600 | ) |  |  | (1,918 | )
Other assets |  |  | — |  |  |  | (72 | )
Accounts payable |  |  | 1,131 |  |  |  | (520 | )
Accrued expenses |  |  | 1,428 |  |  |  | 3,447 |
Net cash used in operating activities |  |  | (46,244 | ) |  |  | (25,460 | )
Cash flows from investing activities: |  |  |  |  |  |  |  |
Purchases of available-for-sale securities |  |  | (118,895 | ) |  |  | — |
Proceeds from maturities of available-for-sale securities |  |  | 12,189 |  |  |  | — |
Purchases of property and equipment |  |  | (126 | ) |  |  | (139 | )
Net cash used in investing activities |  |  | (106,832 | ) |  |  | (139 | )
Cash flows from financing activities: |  |  |  |  |  |  |  |
Proceeds from issuance of common stock upon public offerings, net of issuance costs |  |  | 157,680 |  |  |  | — |
Proceeds from issuance of common stock upon initial public offering, net of issuance costs |  |  | — |  |  |  | 87,691 |
Proceeds from issuance of convertible preferred stock and convertible preferred stock liability, net of issuance costs |  |  | — |  |  |  | 20,000 |
Proceeds from issuance of common stock upon stock option exercises |  |  | 271 |  |  |  | — |
Proceeds from issuance of common stock upon ESPP purchases |  |  | 134 |  |  |  | — |
Proceeds from issuance of common stock |  |  | — |  |  |  | 11 |
Payment of debt issuance costs |  |  | (161 | ) |  |  | — |
Net cash provided by financing activities |  |  | 157,924 |  |  |  | 107,702 |
Net increase in cash and cash equivalents, and restricted cash |  |  | 4,848 |  |  |  | 82,103 |
Cash and cash equivalents, and restricted cash at beginning of period |  |  | 93,360 |  |  |  | 11,257 |
Cash and cash equivalents, and restricted cash at end of period |  | $ | 98,208 |  |  | $ | 93,360 |
Components of cash and cash equivalents, and restricted cash: |  |  |  |  |  |  |  |
Cash and cash equivalents |  | $ | 98,183 |  |  | $ | 93,335 |
Restricted cash |  |  | 25 |  |  |  | 25 |
Total cash and cash equivalents, and restricted cash |  | $ | 98,208 |  |  | $ | 93,360 |
Supplemental disclosures of noncash information: |  |  |  |  |  |  |  |
Issuance of common stock warrant in connection with term loan facility |  | $ | 634 |  |  | $ | — |
Property and equipment purchases included in accounts payable |  | $ | — |  |  | $ | 55 |
Cash paid for taxes |  | $ | 142 |  |  | $ | 106 |
Conversion of convertible preferred stock into common stock at close of initial public offering |  | $ | — |  |  | $ | 49,746 |
Capital contribution related to extinguishment of convertible preferred stock liability |  | $ | — |  |  | $ | 25,595 |

The accompanying notes are an integral part of these consolidated financial statements.

67

89bio, Inc.

Notes to Consolidated Financial Statements

1. Organization and Basis of Presentation

Description of Business

89bio, Inc. (“89bio” or the “Company”) is a clinical-stage biopharmaceutical company focused on the development and commercialization of innovative therapies for the treatment of liver and cardio-metabolic diseases. The Company’s lead product candidate, BIO89-100, a specifically engineered glycoPEGylated analog of fibroblast growth factor 21, is currently being developed for the treatment of nonalcoholic steatohepatitis and for the treatment of severe hypertriglyceridemia.

89bio, Inc. was formed as a Delaware corporation in June 2019, for the purpose of completing an initial public offering (“IPO”) and related transactions in order to carry on the business of 89Bio Ltd., which was incorporated in Israel in January 2018.

The Company completed an internal reorganization transaction in September 2019, pursuant to which 89Bio Ltd. became a wholly owned subsidiary of 89bio, Inc. (the “Reorganization”). As part of the Reorganization, all of the equity holders of 89Bio Ltd. exchanged 100% of the equity of 89Bio Ltd. for 100% of the equity of 89bio, Inc. The Reorganization was considered a transaction between entities under common control.

Public Offerings

In November 2019, 89bio, Inc. completed its IPO, pursuant to which it issued and sold an aggregate of 6,100,390 shares of common stock (inclusive of 795,703 shares pursuant to the underwriters’ option to purchase additional shares), at the IPO price of $16.00 per share, resulting in net proceeds of $87.7 million after deducting underwriting discounts and commissions of $6.8 million and other offering expenses of $3.1 million. Upon the closing of the IPO, the Company’s outstanding convertible preferred stock automatically converted into 7,077,366 shares of common stock of 89bio, Inc. based on a proportional adjustment to the conversion ratio of the convertible preferred stock on a 1-for-6.217 basis.

In July 2020, the Company completed an underwritten public offering of 3,047,040 shares of its common stock (inclusive of 397,440 shares pursuant to the underwriters’ option to purchase additional shares), at the public offering price of $27.50 per share. The Company raised a total of $83.8 million in gross proceeds from the offering, or approximately $78.2 million in net proceeds after deducting underwriting discounts and commissions of $5.0 million and offering costs of approximately $0.6 million.

In September 2020, the Company completed an underwritten public offering of 3,025,000 shares of its common stock, at a public offering price of $28.00 per share. The Company raised a total of $84.7 million in gross proceeds from the offering, or approximately $79.5 million in net proceeds after deducting underwriting discounts and commissions of $4.6 million and offering costs of approximately $0.6 million.

Liquidity

The accompanying consolidated financial statements have been prepared assuming the Company will continue as a going concern, which contemplates the realization of assets and liquidation of liabilities in the normal course of business. To date, the Company has not generated revenues from its activities and has incurred substantial operating losses. Management expects the Company to continue to generate substantial operating losses for the foreseeable future until it completes development of its products and seeks regulatory approvals to market such products. The Company had cash, cash equivalents and short-term investments of $204.6 million as of December 31, 2020.

The Company expects that its cash, cash equivalents and short-term investments as of December 31, 2020, together with proceeds available from the Company’s term loan (see Note 6), will be sufficient to fund operating expenses and capital expenditure requirements for a period of at least one year from the date these audited consolidated financial statements are filed with the Securities and Exchange Commission (“SEC”).

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Notes to Consolidated Financial Statements

2. Summary of Significant Accounting Policies

Basis of Presentation

The consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States (“U.S. GAAP”).

Principles of Consolidation

The accompanying consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation.

Reclassification

Certain prior year footnote amounts have been updated for consistency with the current year presentation. Such reclassification has no effect on the consolidated financial statements.

Foreign Currencies

Certain transactions during the years ended December 31, 2020 and 2019 were denominated in currencies other than the U.S. dollar. Gains and losses from foreign currency transactions were not material for all periods presented and are reflected in the consolidated statements of operations and comprehensive loss as a component of other expenses, net. The Company’s subsidiary in Lithuania uses the Euro as its functional currency for financial reporting. The re-measurement from Euros to U.S. dollars results in translation gain and loss adjustments, which are reflected as a component of comprehensive loss as foreign currency translation adjustments.

Use of Estimates

The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the consolidated financial statements and the reported amounts of expenses during the reporting period. Significant estimates and assumptions made in the accompanying consolidated financial statements include but are not limited to the fair value of stock options and certain accrued expenses. The Company evaluates its estimates and assumptions on an ongoing basis using historical experience and other factors and adjusts those estimates and assumptions when facts and circumstances dictate. Actual results could differ from those estimates.

Fair Value Measurements

Financial assets and liabilities are recorded at fair value on a recurring basis in the balance sheets. The carrying values of Company’s financial assets and liabilities, including cash and cash equivalents, restricted cash, prepaid and other current assets, accounts payable, and accrued expenses approximate to their fair value due to the short-term maturity of these instruments. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability (an exit price) in an orderly transaction between market participants at the reporting date. Assets and liabilities recorded at fair value are categorized based upon the level of judgment associated with the inputs used to measure their fair value. Hierarchical levels are directly related to the amount of subjectivity with the inputs to the valuation of these assets or liabilities as follows:

Level 1—Observable inputs such as unadjusted, quoted prices in active markets for identical assets or liabilities at the measurement date;

Level 2—Inputs (other than quoted prices included in Level 1) are either directly or indirectly observable inputs for similar assets or liabilities. These include quoted prices for identical or similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active;

Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

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Notes to Consolidated Financial Statements

Concentrations of Credit Risk

Financial instruments that potentially subject the Company to a concentration of credit risk consist primarily of cash and cash equivalents. Bank deposits are held by accredited financial institutions and these deposits may at times be in excess of insured limits. The Company limits its credit risk associated with cash and cash equivalents by placing them with financial institutions that it believes are of high quality. The Company has not experienced any losses on its deposits of cash or cash equivalents.

Other Risks and Uncertainties

The Company’s future results of operations involve a number of other risks and uncertainties. Factors that could affect the Company’s future operating results and cause actual results to vary materially from expectations include, but are not limited to, the Company’s early stages of clinical drug development; the Company’s ability to advance product candidates into, and successfully complete, clinical trials on the timelines it projects; the Company’s ability to adequately demonstrate sufficient safety and efficacy of its product candidates; the Company’s ability to enroll patients in its ongoing and future clinical trials; the Company’s ability to successfully manufacture and supply its product candidates for clinical trials; the Company’s ability to obtain additional capital to finance its operations; uncertainties related to the projections of the size of patient populations suffering from the diseases the Company is targeting; the Company’s ability to obtain, maintain, and protect its intellectual property rights; developments relating to the Company’s competitors and its industry, including competing product candidates and therapies; general economic and market conditions; and other risks and uncertainties.

The Company’s product candidates will require approvals from the U.S. Food and Drug Administration and comparable foreign regulatory agencies prior to commercial sales in their respective jurisdictions. There can be no assurance that any product candidates will receive the necessary approvals. If the Company was denied approval, approval was delayed or the Company was unable to maintain approval for any product candidate, it could have a materially adverse impact on the Company.

The ongoing COVID-19 pandemic has disrupted and may continue to disrupt the Company’s business and delay its preclinical and clinical programs and timelines. The Company does not yet know the full extent of potential delays to clinical trials, which could prevent or delay the Company from obtaining approval for BIO89-100. The extent to which the COVID-19 pandemic may impact the Company’s future operating results and financial condition is uncertain.

Segment Reporting

The Company has one operating segment. The Company’s chief operating decision maker, its Chief Executive Officer, manages the Company’s operations on a consolidated basis for the purposes of allocating resources and evaluating financial performance.

Cash and Cash Equivalents

The Company considers all highly liquid investments purchased with original maturities of three months or less from the purchase date to be cash equivalents. Cash equivalents consist primarily of amounts invested in money market funds and commercial paper that are stated at fair value.

Restricted Cash

Restricted cash consists of a money market account that serves as collateral for the Company’s operating lease agreement for its facility in Israel.

Investments

Investments have been classified as available-for-sale and are carried at estimated fair value as determined based upon quoted market prices or pricing models for similar securities. Management determines the appropriate classification of its investments in debt securities at the time of purchase. Generally, investments with original maturities beyond three months at the date of purchase are classified as short-term because it is management’s intent to use the investments to fund current operations or to make them available for current operations.

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Notes to Consolidated Financial Statements

Unrealized gains and losses are excluded from earnings and are reported as a component of comprehensive loss. The Company periodically evaluates whether declines in fair values of its available-for-sale securities below their book value are other-than-temporary. This evaluation consists of several qualitative and quantitative factors regarding the severity and duration of the unrealized loss as well as the Company’s ability and intent to hold the available-for-sale security until a forecasted recovery occurs. Additionally, the Company assesses whether it has plans to sell the security or it is more likely than not it will be required to sell any available-for-sale securities before recovery of its amortized cost basis. Realized gains and losses and declines in fair value judged to be other than temporary, if any, on available-for-sale securities are included in other expenses, net. The cost of investments sold is based on the specific-identification method. There are no material realized gains or losses on investments for the periods presented. Interest on available-for-sale securities is included in other expenses, net and is not material for all periods presented.

Property and Equipment, Net

Property and equipment are stated at cost, less accumulated depreciation. Depreciation is calculated on a straight-line basis over the estimated useful lives of the related assets, generally ranging from three to seven years. Leasehold improvements are amortized on a straight-line basis over the shorter of the assets’ estimated useful life or the remaining term of the lease. Upon retirement or sale of the assets, the cost and related accumulated depreciation and amortization are removed from the consolidated balance sheets and the resulting gains or losses are recorded in the consolidated statements of operations and comprehensive loss. Maintenance and repair costs are expensed as incurred.

Impairment of Long-Lived Assets

The Company periodically evaluates its long-lived assets, including property and equipment, for impairment whenever events or changes in business circumstances indicate that the carrying amount of the assets or group of assets may not be fully recoverable. If indicators of impairment exist and the undiscounted future cash flows that the assets are expected to generate are less than the carrying value of the assets, the Company reduces the carrying amount of the assets through an impairment charge, to their estimated fair values based on a discounted cash flow approach or, when available and appropriate, to comparable market values. There were no such indicators for the periods presented.

Accrued Research and Development Expenses

The Company estimates preclinical and clinical study and research expenses based on the services performed, pursuant to contracts with research institutions that conduct and manage preclinical and clinical studies and research services on its behalf. The Company records the costs of research and development activities based upon the estimated amount of services provided but not yet invoiced and includes these costs in accrued expenses in the consolidated balance sheets. These costs are a component of the Company’s research and development expenses.

The Company accrues for these costs based on factors such as estimates of the work completed and in accordance with agreements established with its third-party service providers under the service agreements. The Company makes judgments and estimates in determining the accrued expenses balance. As actual costs become known, the Company adjusts its accrued expenses. The Company has not experienced any material differences between accrued costs and actual costs incurred. However, the status and timing of actual services performed may vary from the Company’s estimates, resulting in adjustments to expense in future periods. Changes in these estimates that result in material changes to the Company’s accrued expenses could materially affect the Company’s results of operations. Contingent milestone payments, if any, are expensed when the milestone results are probable and estimable, which is generally upon achievement of the milestone.

Leases

The Company leases its office facilities under non-cancelable operating lease agreements and recognizes related rent expense on a straight-line basis over the term of the lease.

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Notes to Consolidated Financial Statements

Convertible Preferred Stock Liability

The freestanding instruments related to the commitment by the Series A convertible preferred stockholders to purchase and by the Company to sell its Series A convertible preferred stock in subsequent closings, contingent upon the achievement of certain developmental milestones and approval by the board of directors, at a fixed price per stock, were considered a liability (or an asset), measured at fair value as the shares underlying the rights contained liquidation preferences upon certain “deemed liquidation events” that were not solely within the Company’s control and which were considered in-substance contingent redemption features. The instruments were subject to revaluation at each balance sheet date until settlement or extinguishment, with revaluations recognized as either a component of other expenses, net in the consolidated statements of operations and comprehensive loss, or additional paid-in capital in the consolidated balance sheets. Upon the completion of the Company’s IPO, the remaining shares of convertible preferred stock that were previously issuable under subsequent closings were no longer issuable. Accordingly, the preferred stock liability was extinguished and because the transaction occurred between related parties, the resulting $25.6 million was accounted for as a capital contribution by the preferred stockholders.

Research and Development Expenses

Research and development expenses consist primarily of costs incurred for the development of the Company’s lead product candidate, BIO89-100. Research and development expenses consist primarily of external costs related to acquiring and licensing patents and intellectual properties, preclinical and clinical development and related supplies, and personnel costs. Personnel costs consist of salaries, employee benefits and share-based compensation for individuals involved in research and development efforts. Payments associated with licensing agreements to acquire licenses to develop, use, manufacture and commercialize products that have not reached technological feasibility and do not have alternate commercial use are expensed as incurred.

Share-Based Compensation

The Company measures its share-based payment awards made to employees, directors, and non-employee service providers based on estimated fair values and recognizes compensation over the requisite service period.

The Company estimates the fair value of share-based payment awards on the date of grant using a Black-Scholes option pricing model. The Company recognizes compensation for the value of share-based payment awards, which have graded vesting, using the straight-line method over the requisite service period of each award. The Company accounts for forfeitures as they occur.

The Black-Scholes option pricing model requires a number of assumptions, of which the most significant are expected volatility, expected option term (the time from the grant date until the options are exercised or expire), risk-free rate, and expected divided rate. These assumptions include:

| • | Expected volatility—Since the Company has limited trading history for its common stock due to its short trading history, the expected volatility is estimated based on the volatility of comparable publicly traded biotechnology companies during the equivalent period of the calculated expected term of the options granted. The comparable companies were chosen based on their similar size, stage in the life cycle or area of specialty.

| • | Expected term—The expected term of options granted to employees and directors is determined using the “simplified” method. Under this approach, the expected term is presumed to be the midpoint between the weighted-average vesting term and the contractual term of the option. The simplified method makes the assumption that the employee will exercise share options evenly over the period when the share options are vested and ending on the date when the share options would expire. The expected option term for options granted to non-employees is estimated on a grant-by-grant basis.

| • | Risk-free interest rate—The risk-free interest rate is based on the U.S. Treasury zero coupon bonds in effect on the grant date for periods with an equivalent expected term as the option.

| • | Expected dividend—The Company has never paid dividends and has no foreseeable plans to pay dividends on its shares of common stock. Therefore, an expected dividend of zero is used.

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Notes to Consolidated Financial Statements

Income Taxes

Income taxes are accounted for under the asset and liability method. Under this method, deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the consolidated financial statements carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates applied to taxable income in the years in which those temporary differences are expected to be realized. The effect on deferred tax assets and liabilities of a change in tax rates is recognized as income or loss in the period that includes the enactment date. A valuation allowance is established when necessary to reduce deferred tax assets to the amount expected to be realized. Interest and penalties related to unrecognized tax benefits are included within the provision of income tax.

Basic and Diluted Net Loss per Share

Basic loss per share is computed by dividing the net loss by the weighted average number of common stock outstanding during the period. Diluted loss per share is computed by dividing the net loss by the weighted average number of common stock outstanding together with the number of additional common stock that would have been outstanding if all potentially dilutive common stock had been issued. Since the Company is in a loss position for the periods presented, basic net loss per share is the same as diluted net loss per share since the effects of potentially dilutive securities are antidilutive.

Comprehensive Loss

The Company’s comprehensive loss is comprised of changes in unrealized gains or losses on available-for-sale securities and foreign currency translation adjustments.

Recently Adopted Accounting Standards

In August 2018, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“ASU”) No. 2018-13, Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement, which amends ASC 820, Fair Value Measurement. This ASU modifies the disclosure requirements for fair value measurements by removing, modifying, or adding certain disclosures. The Company adopted this standard effective from January 1, 2020, with the removed and modified disclosures adopted on a retrospective basis and the new disclosures adopted on a prospective basis. The standard did not have a material impact on the Company’s consolidated financial statements and related disclosures.

Recent Accounting Pronouncements

In February 2016, the FASB issued ASU 2016-02—Leases (“ASU 2016-02”), requiring the recognition of lease assets and liabilities on the balance sheet. The standard: (a) clarifies the definition of a lease; (b) requires a dual approach to lease classification similar to current lease classifications; and (c) causes lessees to recognize leases on the balance sheet as a lease liability with a corresponding right-of-use asset for leases with a lease-term of more than twelve months. The standard is effective for public entities for fiscal years beginning after December 15, 2018 and for nonpublic entities for fiscal years beginning after December 15, 2021. As an emerging growth company, ASU 2016-02 is effective for the Company for the year ending December 31, 2022 and interim periods within the year ending December 31, 2023. The Company is currently evaluating the impact of this standard on its consolidated financial statements and related disclosures.

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Notes to Consolidated Financial Statements

3. Fair Value Measurements

The following table presents the Company’s financial assets measured at fair value on a recurring basis by level within the fair value hierarchy as of December 31, 2020 (in thousands):

|  |  |  | As of December 31, 2020 |
|  | Valuation |  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  |  |  |
|  | Hierarchy |  | Cost |  |  | Gains |  |  | Losses |  |  | Fair Value |
Money market funds |  | Level 1 |  | $ | 46,134 |  |  | $ | — |  |  | $ | — |  |  | $ | 46,134 |
Commercial paper |  | Level 2 |  |  | 76,605 |  |  |  | — |  |  |  | (2 | ) |  |  | 76,603 |
Agency bonds |  | Level 2 |  |  | 29,654 |  |  |  | 15 |  |  |  | — |  |  |  | 29,669 |
Corporate debt securities |  | Level 2 |  |  | 11,890 |  |  |  | — |  |  |  | (6 | ) |  |  | 11,884 |
U.S. government bonds |  | Level 2 |  |  | 7,093 |  |  |  | — |  |  |  | — |  |  |  | 7,093 |
Municipal bonds |  | Level 2 |  |  | 5,592 |  |  |  | 2 |  |  |  | (1 | ) |  |  | 5,593 |
U.S. treasury bills |  | Level 2 |  |  | 4,680 |  |  |  | — |  |  |  | — |  |  |  | 4,680 |
Agency discount securities |  | Level 2 |  |  | 200 |  |  |  | — |  |  |  | — |  |  |  | 200 |
Total cash equivalents and available-for-sale securities |  |  |  | $ | 181,848 |  |  | $ | 17 |  |  | $ | (9 | ) |  | $ | 181,856 |
Classified as: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ | 75,410 |
Short-term investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 106,446 |
Total cash equivalents and available-for-sale securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ | 181,856 |

The following table summarizes the Company’s cash equivalents and available-for-sale securities by contractual maturity as of December 31, 2020 (in thousands):

|  | As of December 31, 2020 |
Within one year |  | $ | 160,304 |
After one year through two years |  |  | 21,552 |
Total cash equivalents and available-for-sale securities |  | $ | 181,856 |

The Company did not hold any financial assets as of December 31, 2019.

The Company’s convertible preferred stock liability represented a Level 3 financial liability measured at fair value on a recurring basis prior to its extinguishment in the fourth quarter of 2019. Accordingly, there was no Level 3 financial liability outstanding during the year ended and as of December 31, 2020.

For the year ended December 31, 2019, changes in the fair value of the Company’s Level 3 financial liability measured on a recurring basis were as follows (in thousands):

|  | Year Ended December 31, |
|  | 2019 |
Beginning balance |  | $ | 1,671 |
Revaluation of convertible preferred stock liability recorded in other expenses (income), net |  |  | 30,597 |
Partial settlement of convertible preferred stock liability upon third closing |  |  | (6,673 | )
Capital contribution related to extinguishment of preferred stock liability |  |  | (25,595 | )
Ending balance |  | $ | — |

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Notes to Consolidated Financial Statements

The Company’s convertible preferred stock liability resulted from the initial sale of Series A convertible preferred stock where the investors’ committed to purchase additional shares of Series A convertible preferred stock in subsequent closings, contingent upon the achievement by the Company of certain development milestones and approval by the board of directors. The investors’ commitment to purchase and the Company’s commitment to sell shares of Series A convertible preferred stock represented a freestanding instrument accounted for at fair value and re-measured at each reporting date. The Company estimated the fair value of this commitment using the Black Scholes option pricing model using the following assumptions:

|  | Year Ended |
|  | December 31, |
|  | 2019 |
Stock price |  | $0.99-$2.57 |
Exercise price |  | $1.00 |
Expected term (years) |  | 0.00-2.25 |
Expected volatility |  |  | 72.0 | %
Risk-free interest rate |  | 0.0-2.4% |

4. Consolidated Balance Sheet Components

Property and Equipment, Net

Property and equipment, net consists of the following (in thousands):

|  | As of December 31, |
|  | 2020 |  |  | 2019 |
Computer equipment |  | $ | 105 |  |  | $ | 67 |
Furniture and office equipment |  |  | 144 |  |  |  | 111 |
Total property and equipment |  |  | 249 |  |  |  | 178 |
Less: accumulated depreciation |  |  | (83 | ) |  |  | (23 | )
Total property and equipment, net |  | $ | 166 |  |  | $ | 155 |

Depreciation expense for property and equipment was $60,000 and $17,000 for the years ended December 31, 2020 and 2019, respectively.

Accrued Expenses

Accrued expenses consist of the following (in thousands):

|  | As of December 31, |
|  | 2020 |  |  | 2019 |
Accrued research and development expenses |  | $ | 2,884 |  |  | $ | 2,326 |
Accrued employee and related expenses |  |  | 2,552 |  |  |  | 1,396 |
Accrued professional and legal fees |  |  | 453 |  |  |  | 573 |
Accrued other |  |  | 159 |  |  |  | 325 |
Total accrued expenses |  | $ | 6,048 |  |  | $ | 4,620 |

5. Commitments and Contingencies

Leases

In May 2018, the Company entered into an operating lease agreement for its facility in Israel. The lease term expires in April 2021 and the Company has an option to renew for an additional 12 months. Under the lease agreement, monthly lease payments are approximately $4,000.

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Notes to Consolidated Financial Statements

In December 2019, the Company entered into an operating lease for its headquarters in San Francisco. The lease term is for 24 months, expiring in January 2022, and monthly lease payments during 2020 were approximately $17,500.

Future minimum lease payments under the Company’s non-cancellable operating lease obligations as of December 31, 2020, are as follows (in thousands):

|  | As of December 31, 2020 |
2021 |  | $ | 232 |
2022 |  |  | 8 |
Total future minimum annual payments |  | $ | 240 |

Rent expense was $273,000 and $159,000 for years ended December 31, 2020 and 2019, respectively. The Company has security deposit balances of $95,000, which are included in restricted cash and other assets in the consolidated balance sheets as of December 31, 2020 and 2019.

Asset Transfer and License Agreement with Teva Pharmaceutical Industries Ltd

In April 2018, the Company concurrently entered into two Asset Transfer and License Agreements (the “Teva Agreements”) with Teva Pharmaceutical Industries Ltd (“Teva”) under which it acquired certain patents and intellectual property relating to two programs: (1) Teva’s glycoPEGylated FGF21 program, including the compound TEV-47948 (BIO89-100), a glycoPEGylated long-acting FGF21 and (2) Teva’s development program of small molecule inhibitors of Fatty Acid Synthase. Pursuant to the Teva Agreements, the Company paid Teva an initial nonrefundable upfront payment of $6.0 million and the Company could be obligated to pay Teva up to $67.5 million under each program, for a total of $135.0 million, upon the achievement of certain clinical development and commercial milestones. In addition, the Company is obligated to pay Teva tiered royalties at percentages in the low-to-mid single-digits on worldwide net sales on all products containing the Teva compounds.

The Teva Agreements can be terminated (i) by the Company without cause, after the first anniversary of the effective date, upon 120 days’ written notice to Teva, (ii) by either party, if the other party materially breaches any of its obligations under the Agreements and fails to cure such breach within 60 days after receiving notice thereof, or (iii) by either party, if a bankruptcy petition is filed against the other party and is not dismissed within 60 days. In addition, Teva can also terminate the agreement related to the Company’s glycoPEGylated FGF21 program in the event the Company, or any of its affiliates or sublicensees, challenges any of the Teva patents licensed to the Company, and the challenge is not withdrawn within 30 days of written notice from Teva.

During the years ended December 31, 2020 and 2019, there were no license payment expenses related to the Teva Agreements.

6. Term Loan

Loan and Security Agreement

In April 2020, the Company and certain of its subsidiaries entered into a Loan and Security Agreement (the “Loan Agreement”) with the lenders referred to therein (the “Lenders”), and Silicon Valley Bank, as collateral agent. The Loan Agreement provides for (i) a secured term A loan facility (the “Term A Loan Facility”) of up to $10.0 million and (ii) a secured term B loan facility (the “Term B Loan Facility”) of up to $5.0 million that is available upon the Company satisfying certain milestones. The Term A Loan Facility matures on November 1, 2022, provided, that if the Term B Loan Facility is funded, the facilities instead mature on September 1, 2023. The loans will bear interest at the greater of (i) 4.50% and (ii) the sum of (a) the Prime Rate as reported in The Wall Street Journal plus (b) 1.25%. As of December 31, 2020, the Company had not drawn any amount under the Loan Agreement.

In connection with the execution of the Loan Agreement, the Company agreed to issue the Lenders warrants to purchase shares of the Company’s common stock. In April 2020, the Company issued Silicon Valley Bank a

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Notes to Consolidated Financial Statements

warrant to purchase 25,000 shares of the Company’s common stock with a warrant exercise price of $22.06 per share that is immediately exercisable. The initial expiration date of April 7, 2030 was changed to June 30, 2025 in connection with the July 2020 offering. The Company determined the fair value of the warrant at the issuance date by using the Black-Scholes option-pricing model with the following assumptions: risk-free interest rate of 0.75%, no dividends, expected volatility of 92.3% and expected term of 10.0 years. Upon issuance, the fair value allocated to the warrant of $0.6 million was recorded as a debt issuance cost and classified within other assets and met the requirements for equity classification within additional paid-in capital on the consolidated balance sheets. An additional warrant to purchase 8,333 shares of the Company’s common stock will be issued in connection with the Term B Loan Facility, if funded, with the exercise price determined on the Company’s stock price at the time of issuance.

Additionally, the Company incurred $0.2 million in closing costs that were recorded as debt issuance costs and classified within other assets on the consolidated balance sheets.

The deferred assets related to the debt issuance cost and warrant are recognized as interest expense over the duration of the Loan Agreement and are recorded within other expenses, net on the consolidated statements of operations and comprehensive loss. As of December 31, 2020, the remaining unamortized debt issuance costs classified within other assets on the consolidated balance sheet is $0.6 million.

7. Convertible Preferred Stock

In April 2018, the Company entered into the Series A Share Purchase Agreement (the “Series A SPA”), pursuant to which the investors committed to invest an aggregate amount of up to $60.0 million for the issuance of shares of Series A convertible preferred stock at a price of $1.00 per share in subsequent closings. Upon the completion of the Company’s IPO on November 13, 2019, there were 16,000,000 remaining shares of convertible preferred stock that were previously issuable that were no longer issuable. Accordingly, the preferred stock liability was extinguished and because the transaction occurred between related parties, the resulting $25.6 million was accounted for as a capital contribution by the preferred stockholders during 2019. Additionally, immediately prior to the completion of the Company’s IPO, all outstanding shares of convertible preferred stock automatically converted into 7,077,366 shares of common stock and the related carrying value was reclassified to common stock and additional paid-in capital.

8. Share-Based Compensation

Equity Incentive Plans

In 2018, the Company’s board of directors adopted the 89Bio Ltd. 2018 Equity Incentive Plan (the “2018 Plan”). In connection with the Reorganization in September 2019, the Company’s board of directors approved the 2019 Equity Incentive Plan (the “2019 Plan”), which became effective in September 2019. From and after the effective date of the 2019 Plan, the Company will no longer be making any future awards under the 2018 Plan.

The Company initially reserved 2,844,193 shares of common stock for issuance under the 2019 Plan. In addition, the number of shares of common stock reserved for issuance under the 2019 Plan will automatically increase on the first day of January for a period of up to ten years, commencing on January 1, 2020, in an amount equal to 4% of the total number of shares of the Company’s capital stock outstanding on the immediately preceding December 31, or a lesser number of shares determined by the Company’s board of directors. As of December 31, 2020, there were 1,433,991 shares of common stock available for issuance as future option grants under the 2019 Plan.

The Board determines the period over which options become exercisable and options generally vest over a four-year period, with 25% of options vesting on the first anniversary of employment, and thereafter, the remaining options vesting quarterly, over the following 36-month period. The options will expire within ten years from the date of grant. The exercise price of awards granted will not be less than the estimated fair value of the shares on the date of grant.

77

89bio, Inc.

Notes to Consolidated Financial Statements

Employee S tock Purchase Plan

In October 2019, the Company adopted the 2019 Employee Stock Purchase Plan (“ESPP”), which became effective following the date of the IPO. The Company initially reserved 225,188 shares of common stock for purchase under the ESPP. The number of shares of common stock reserved for issuance under the ESPP will automatically increase on the first day of January for a period of up to ten years, in an amount equal to 1% of the total number of shares of the Company’s common stock outstanding on the immediately preceding December 31, or a lesser number of shares determined by the Company’s board of directors. Purchases will be accomplished through the participation of discrete offering periods and each offering is expected to be 6 months long. For each offering period, ESPP participants will purchase shares of common stock at a price per share equal to 85% of the lesser of the fair market value of the Company’s common stock on (1) the first trading day of the applicable offering period or (2) the last trading day of the applicable offering period.

The first six-month offering period under the ESPP commenced on January 1, 2020 and ended on June 30, 2020 and the second six-month offering period commenced on July 1, 2020 and ended on December 31, 2020. A total of 7,272 shares of common stock were purchased pursuant to the ESPP for the year ended December 31, 2020. As of December 31, 2020, there were 355,806 shares of common stock available for issuance under the ESPP.

The Company recorded share-based compensation for the periods indicated as follows (in thousands):

|  | Year Ended December 31, |
|  | 2020 |  |  | 2019 |
Research and development |  | $ | 1,250 |  |  | $ | 30 |
General and administrative |  |  | 2,557 |  |  |  | 359 |
Total share-based compensation |  | $ | 3,807 |  |  | $ | 389 |

The fair value of option awards granted for the periods indicated was estimated at the date of grant using a Black-Scholes option-pricing model with the following assumptions:

|  | Year Ended December 31, |
|  | 2020 |  |  | 2019 |
Expected term (years) |  | 4.0-6.1 |  |  | 5.9-6.1 |
Contractual term (years) |  |  | 10.0 |  |  |  | 10.0 |
Expected volatility |  | 86.4-97.6% |  |  | 61.8-87.6% |
Risk-free interest rate |  | 0.2-1.5% |  |  | 1.6-2.6% |
Expected dividend |  |  | — |  |  |  | — |

The following table summarizes stock option activity for the year ended December 31, 2020:

|  |  |  |  |  |  |  |  |  | Weighted |  |  |  |  |
|  |  |  |  |  | Weighted |  |  | Average |  |  |  |  |
|  |  |  |  |  | Average |  |  | Remaining |  |  | Aggregate |
|  | Number of |  |  | Exercise |  |  | Contractual |  |  | Intrinsic |
|  | Options |  |  | Price |  |  | Term |  |  | Value |
|  |  |  |  |  |  |  |  |  | (In years) |  |  | (In thousands) |
Balance outstanding as of December 31, 2019 |  |  | 1,320,243 |  |  | $ | 3.34 |  |  |  | 9.23 |  |  | $ | 30,353 |
Granted |  |  | 682,000 |  |  |  | 29.78 |  |  |  |  |  |  |  |  |
Exercised |  |  | (63,366 | ) |  |  | 4.29 |  |  |  |  |  |  |  |  |
Cancelled |  |  | (40,482 | ) |  |  | 2.87 |  |  |  |  |  |  |  |  |
Balance outstanding as of December 31, 2020 |  |  | 1,898,395 |  |  |  | 12.79 |  |  |  | 8.60 |  |  | $ | 25,918 |
Exercisable as of December 31, 2020 |  |  | 535,084 |  |  | $ | 2.58 |  |  |  | 8.11 |  |  | $ | 11,684 |

During the year ended December 31, 2020, the estimated total grant date fair value of options vested was $0.8 million. The weighted-average grant date fair value of options granted for the years ended December 31, 2020 and 2019 was $21.88 and $2.90 per share, respectively. As of December 31, 2020, there was $13.5 million of

78

89bio, Inc.

Notes to Consolidated Financial Statements

unrecognized share-based compensation cost related to stock options granted under the 2019 Plan, which is expected to be recognized over a weighted-average period of 2.5 years.

9. Income Taxes

Tax Rates Applicable to the Income of the Company and its Subsidiaries

As a result of the Reorganization described in Note 1, the Company is taxed according to U.S. federal and state tax laws and Israeli tax laws. The statutory tax rates applicable to the income of the Company and its subsidiaries are as follows:

|  | Year Ended December 31, |
|  | 2020 |  |  | 2019 |
89bio, Inc. |  |  | 21 | % |  |  | 21 | %
89Bio Ltd |  |  | 23 | % |  |  | 23 | %
89bio Management, Inc. |  |  | 21 | % |  |  | 21 | %
UAB 89bio Lithuania |  |  | 15 | % |  |  | 15 | %

The income tax benefit (expense) is comprised of (in thousands):

|  | Year Ended December 31, |
|  | 2020 |  |  | 2019 |
Current: |  |  |  |  |  |  |  |
Federal |  | $ | (11 | ) |  | $ | (167 | )
State |  |  | 1 |  |  |  | (1 | )
Foreign |  |  | — |  |  |  | (30 | )
Total |  |  | (10 | ) |  |  | (198 | )
Deferred: |  |  |  |  |  |  |  |
Federal |  |  | 69 |  |  |  | (20 | )
Total |  |  | 69 |  |  |  | (20 | )
Income tax benefit (expense) |  | $ | 59 |  |  | $ | (218 | )

Deferred Income Taxes

Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Significant components of the Company’s deferred tax assets are as follows (in thousands):

|  | As of December 31, |
|  | 2020 |  |  | 2019 |
U.S. net operating loss carryforwards |  | $ | 11,342 |  |  | $ | 1,916 |
Israel net operating loss carryforwards |  |  | 3,978 |  |  |  | 4,328 |
Research and development expenses |  |  | 5,392 |  |  |  | 3,419 |
Accrued expenses |  |  | 635 |  |  |  | 349 |
Other |  |  | 658 |  |  |  | 10 |
Total deferred tax assets |  |  | 22,005 |  |  |  | 10,022 |
Less: valuation allowance |  |  | (21,936 | ) |  |  | (10,022 | )
Net deferred tax assets |  | $ | 69 |  |  | $ | — |

U.S. research and development expenses and accrued expenses disclosed for the year ended December 31, 2019 were previously reported in the 2019 notes to the consolidated financial statements as a component of other. The reclassification had no impact on the consolidated financial statements for the year ended December 31, 2019.

79

89bio, Inc.

Notes to Consolidated Financial Statements

As of December 31, 20 20 and 201 9, the Company recorded a valuation allowance of $21.9 million and $10.0 million, respectively, in respect of deferred tax assets resulting from tax loss carryforwards and other temporary differences. Realization of deferred tax assets is dependent upon future earnings, if any, the time and amount of which are uncertain. The Company regularly assesses the likelihood that its deferred tax assets will be recovered from future taxable income and, to the extent it believes based upon the weight of available evidence that it is more likely than not that all or a portion of deferred tax assets will not be realized, a valuation allowance is established through an adjustment to income tax expense. The valuation allowance increased by $11.9 million in 20 20, which primarily relates to significant taxable losses. The change in valuation allowance during 2020 also includes a partial release of the valuation allowance against deferred tax assets in Israel due to achievement of recent profitability and the expectation of future profitability in the jurisdiction, which decreased the valuation allowance by $69,000 in 2020. The valuation allowance increased by $6.5 million in 2019, which primarily relates to significant taxable losses. It also includ e s a recapture of the valuation allowance against the Company’s deferred tax assets in the United States due to the R eorganization that occurred in 2019, which increased the valuation allowance by $20,000.

Available Carryforward Tax Losses and Credits

As of December 31, 2020, the Company has an accumulated tax loss carryforward of approximately $54.1 million and $17.3 million for U.S. and Israeli tax purposes, respectively. As of December 31, 2019, the Company has an accumulated tax loss carryforward of approximately $9.1 million and $23.8 million for U.S. and Israeli tax purposes. Federal net operating losses generated after 2017 can be carried forward indefinitely but utilization will be limited to 80% of taxable income in the period that net operating losses are being utilized. Carryforward tax losses in Israel have no expiration date.

As of December 31, 2020, the Company has federal research and development credit carryforwards of approximately $0.6 million, which expire beginning in 2040. As of December 31, 2020 and 2019, the Company has state research and development credit carryforwards of approximately $0.7 million and $0.2 million, respectively, which will carry forward indefinitely.

Loss from Continuing Operations, Before Income Tax

The Company recorded a loss from continuing operations, before income tax for the periods indicated as follows (in thousands):

|  | Year Ended December 31, |
|  | 2020 |  |  | 2019 |
United States |  | $ | (58,760 | ) |  | $ | (19,502 | )
Lithuania |  |  | (73 | ) |  |  | 200 |
Israel |  |  | 9,275 |  |  |  | (37,900 | )
Net loss before income tax |  | $ | (49,558 | ) |  | $ | (57,202 | )

80

89bio, Inc.

Notes to Consolidated Financial Statements

Reconciliation of Income Tax Benefit (Expense)

The reconciliation of income tax benefit (expense) based on the statutory tax rate to the effective tax rate is as follows (in thousands):

|  | Year Ended December 31, |
|  | 2020 |  |  | 2019 |
Income tax benefit computed at statutory rates |  | $ | 8,285 |  |  | $ | 13,095 |
Research and development credits, net of uncertain tax position |  |  | 815 |  |  |  | 93 |
Change in valuation allowance |  |  | (11,914 | ) |  |  | (6,520 | )
Change in Israel effective tax rate due to the 2019 reorganization |  |  | 647 |  |  |  | (734 | )
Foreign rate differential |  |  | 1,671 |  |  |  | — |
Revaluation of convertible preferred stock liability |  |  | — |  |  |  | (6,039 | )
Other |  |  | 555 |  |  |  | (113 | )
Income tax benefit (expense) |  | $ | 59 |  |  | $ | (218 | )

Research and development credits, net of uncertain tax position disclosed for the year ended December 31, 2019 were previously reported in the 2019 notes to the consolidated financial statements as a component of other. The reclassification has no impact on the consolidated financial statements for the year ended December 31, 2019.

Utilization of the U.S. federal and state net operating losses and credit carryforwards may be subject to an annual limitation provided for in Section 382 of the Internal Revenue Code and similar state codes. Any annual limitation could result in a deferral of the utilization of the net operating loss and credit carryforwards.

Unrecognized Tax Benefits

During the years ended December 31, 2020 and 2019, the amount of gross unrecognized tax benefits increased by $0.3 million and $39,000, respectively. If the total amount of unrecognized tax benefits was recognized, it would not have an impact to the effective tax rate as it would be offset by the reversal of related deferred tax assets which are subject to a full valuation allowance.

The Company recognizes interest and penalties related to uncertain tax positions as part of the income tax provision. As of December 31, 2020 and 2019, such interest and penalties are not material.

The Company is subject to taxation in the United States, California, and several foreign jurisdictions. To date, the Company has not been subject to any federal or state income tax audits. The Company is currently under examination by the Israeli taxing authorities for 2019 and 2018. As of December 31, 2020, all tax years remain open to examination.

In March 2020 and December 2020, the United States enacted the Coronavirus Aid, Relief, and Economic Security (“CARES”) Act and the Consolidated Appropriation Act (“CAA”), respectively, as a result of the COVID-19 pandemic, which contain among other things, numerous income tax provisions. Some of these tax provisions are expected to be effective retroactively for years ending before the date of enactment. The Company has evaluated the current legislation and at this time, does not anticipate the CARES Act or the CAA to have a material impact on its consolidated financial statements.

81

89bio, Inc.

Notes to Consolidated Financial Statements

10. Net Loss Per Share

The following outstanding potentially dilutive shares, including all outstanding stock options, have been excluded from the calculation of diluted net loss per share for the periods presented due to their anti-dilutive effect:

|  | Year Ended December 31, |
|  | 2020 |  |  | 2019 |
Stock options to purchase common stock |  |  | 1,898,395 |  |  |  | 1,320,243 |
Shares available for future option grants |  |  | 1,433,991 |  |  |  | 1,523,950 |
Total |  |  | 3,332,386 |  |  |  | 2,844,193 |

82

Item 9. Changes in and Disagreements With Accountants on Accounting and Financial Disclosure.

None.

Item 9A. Controls and Procedures.

Evaluation of Disclosure Controls and Procedures

As of December 31, 2020, our management, with the participation and supervision of our principal executive officer and our principal financial officer, evaluated our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act). The term “disclosure controls and procedures,” as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act, means controls and other procedures of a company that are designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the SEC’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is accumulated and communicated to the Company’s management, including its principal executive and principal financial officers, as appropriate to allow timely decisions regarding required disclosure. Management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving their objectives and management necessarily applies its judgment in evaluating the cost benefit relationship of possible controls and procedures. Based on this evaluation, our principal executive officer and our principal financial officer concluded that our disclosure controls and procedures were effective as of December 31, 2020 to provide reasonable assurance that information we are required to disclose in reports that we file or submit under the Exchange Act is recorded, processed, summarized, and reported within the time periods specified in SEC rules and forms, and that such information is accumulated and communicated to our management, including our principal executive officer and our principal financial officer, as appropriate, to allow timely decisions regarding required disclosure.

Remediation Efforts on Previously Reported Material Weaknesses

During the audit of our consolidated financial statements for the period from January 18, 2018 (inception) to December 31, 2018, material weaknesses were identified 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 our annual or interim consolidated financial statements will not be prevented or detected on a timely basis by the company’s internal controls. The material weaknesses that were identified related to the following:

| • | We did not have an internal finance department. Consequently, we lacked sufficient personnel with an appropriate level of knowledge and requisite U.S. generally accepted accounting principles expertise to identify, evaluate and account for complex and non-routine transactions and an adequate supervisory review structure that is needed to comply with financial reporting requirements.

| • | We did not have an adequate assessment of risks that could significantly impact internal controls over financial reporting and did not effectively design and monitor controls in response to the risks of material misstatement.

In 2019 and 2020, we implemented controls to remedy these material weaknesses. In 2019, we hired our Chief Financial Officer, principal accounting officer and additional qualified accounting and finance personnel, formalized our hiring practices and engaged financial consultants to enable the implementation of internal controls over financial reporting. In April 2020, we added a financial expert to the audit committee of the board of directors and in June 2020, we appointed a new board member, who also serves as audit committee chair.

As a result of these remediation activities and based on testing of the new and modified controls for operating effectiveness, our management concluded that we remediated the previously reported material weakness as of December 31, 2020.

83

Changes in Internal Control over Financial Reporting

Other than the changes in connection with the remediation of our previously disclosed material weaknesses, no change in our internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) occurred during the quarter ended December 31, 2020 that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

Management’s Annual Report on Internal Control Over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting (as defined in Rules 13a-15(f) under the Exchange Act). Internal control over financial reporting is a process designed under the supervision and with the participation of our management, including our principal executive officer and our principal financial officer, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles in the United States.

As of December 31, 2020, our management assessed the effectiveness of our internal control over financial reporting using the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission in Internal Control-Integrated Framework (“2013 Framework”). Based on this assessment, our management concluded that our internal control over financial reporting was effective as of December 31, 2020.

Attestation Report of Registered Public Accounting Firm

As an emerging growth company, we are not required to provide and this Annual Report on Form 10-K does not include an attestation report on our internal control over financial reporting issued by the Company’s independent registered public accounting firm. Our auditors will not be required to formally opine on the effectiveness of our internal control over financial reporting pursuant to Section 404(b) of the Sarbanes-Oxley Act of 2002 until we are no longer an emerging growth company, as defined in the Jumpstart Our Business Startups Act of 2012, and are no longer a non-accelerated filer.

Item 9B. Other Information.

None.

84

PART III

Item 10. Directors, Executive Officers and Corporate Governance.

The information required by this Item 10 is incorporated herein by reference to information in our proxy statement for our 2021 Annual Meeting of Stockholders (the “2021 Proxy Statement”), which we expect to be filed with the SEC within 120 days of the end of our fiscal year ended December 31, 2020, including under the heading “Directors, Executive Officers and Corporate Governance.”

We have adopted a written code of business conduct and ethics that applies to our directors, officers and employees, including our principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions. A copy of the code is available on our website located at www.89bio.com, under “Corporate Governance.” We intend to disclose on our website any amendments to, or waivers from, the code of business conduct and ethics that are required to be disclosed pursuant to the disclosure requirements of Item 5.05 of Form 8-K within four business days following the date of the amendment or waiver.

Item 11. Executive Compensation.

The information required by this Item 11 is incorporated herein by reference to information in our 2021 Proxy Statement, including under headings “Executive Compensation” and “Directors, Executive Officers and Corporate Governance.”

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.

The information required by this Item 12 is incorporated herein by reference to information in our 2021 Proxy Statement, including under headings “Security Ownership of Certain Beneficial Owners and Management” and “Executive Compensation-Securities Authorized for Issuance Under Equity Compensation Plans.”

Item 13. Certain Relationships and Related Transactions, and Director Independence.

The information required by this Item 13 is incorporated herein by reference to information in our 2021 Proxy Statement, including under headings “Directors, Executive Officers and Corporate Governance” and “Certain Relationships and Related Party Transactions.”

Item 14. Principal Accounting Fees and Services.

The information required by this Item 14 is incorporated herein by reference to information in our 2021 Proxy Statement, including under headings “Proposal 2: Ratification of Selection of Independent Registered Public Accounting Firm.”

85

PART IV

Item 15. Exhibits, Financial Statement Schedules.

| (a) | The following documents are filed as a part of this report:

| (1) | Financial Statements

See Index to Consolidated Financial Statements at Part II Item 8 “Financial Statements and Supplementary Data.”

| (2) | Financial Statement Schedules

The financial statement schedules are omitted as they are either not applicable or the information required is presented in the financial statements and notes thereto under Part II Item 8 “Financial Statements and Supplementary Data.”

| (3) | Exhibits:

86

Exhibit Index

Exhibit Number |  | Description
2.1 |  | Contribution and Exchange Agreement, dated as of September 17, 2019, by and among 89Bio Ltd., the Company and its shareholders (filed with the SEC as Exhibit 2.1 to the Company’s Form S-1 filed on October 11, 2019)
3.1 |  | Second Amended and Restated Certificate of Incorporation of the Company (filed with the SEC as Exhibit 3.1 to the Company’s Form 8-K filed on November 15, 2019)
3.2 |  | Second Amended and Restated Bylaws of the Company (filed with the SEC as Exhibit 3.2 to the Company’s Form 8-K filed on November 15, 2019)
4.1 |  | Specimen common stock certificate of the Company (filed with the SEC as Exhibit 4.1 to the Company’s Form S-1/A filed on October 28, 2019)
4.2 |  | Investors’ Rights Agreement, dated as of September 17, 2019, by and among the Company and certain of its shareholders (filed with the SEC as Exhibit 4.2 to the Company’s Form S-1 filed on October 11, 2019)
4.3* |  | Description of Securities
4.4 |  | Form of Warrant to Purchase Common Stock for Silicon Valley Bank (filed with SEC as Exhibit 4.1 to the Company’s Current Report on Form 8-K filed on April 13, 2020)
10.1+ |  | Form of Indemnification Agreement for directors and executive officers (filed with the SEC as Exhibit 10.1 to the Company’s Form S-1 filed on October 11, 2019)
10.2+ |  | Amended and Restated 2019 Equity Incentive Plan and form of agreements thereunder (filed with the SEC as Exhibit 10.2 to the Company’s Form S-1/A filed on October 28, 2019)
10.3+ |  | 2019 Employee Stock Purchase Plan (filed with the SEC as Exhibit 10.3 to the Company’s Form S-1/A filed on October 28, 2019)
10.4+ |  | Executive Employment Offer Letter, dated April 15, 2020, by and between the Company and Rohan Palekar (filed with the SEC as Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on May 4, 2020)
10.5+ |  | Amended and Restated Executive Employment Agreement, dated July 28, 2020, by and between 89Bio Ltd. and Ram Waisbourd (filed with the SEC as Exhibit 10.5 to the Company’s S-1 filed on September 14, 2020)
10.6+ |  | Executive Employment Offer Letter, dated April 15, 2020, by and between the Company and Hank Mansbach (filed with the SEC as Exhibit 10.3 to the Company’s Current Report on Form 8-K filed on May 4, 2020)
10.7+ |  | Executive Employment Offer Letter, dated April 15, 2020, by and between the Company and Quoc Le-Nguyen (filed with the SEC as Exhibit 10.4 to the Company’s Current Report on Form 8-K filed on May 4, 2020)
10.8+ |  | Executive Employment Offer Letter, dated April 15, 2020, by and between the Company and Ryan Martins (filed with the SEC as Exhibit 10.2 to the Company’s Current Report on Form 8-K filed on May 4, 2020)
10.9+ |  | Director Offer Letter, dated July 1, 2018, by and between 89Bio Ltd. and Michael Hayden (filed with the SEC as Exhibit 10.9 to the Company’s Form S-1 filed on October 11, 2019)
10.10+ |  | Non-Employee Director Compensation Policy (filed with the SEC as Exhibit 10.1 to the Company’s Quarterly Report on Form 10-Q filed on November 13, 2020)

87

Exhibit Number |  | Description
10.11† |  | Asset Transfer and License Agreement—FGF21 by and among 89Bio Ltd., ratiopharm GmbH, Teva Branded Pharmaceutical Products R&D, Inc. and Teva Pharmaceutical Industries Ltd, dated as of April 16, 2018 (filed with the SEC as Exhibit 10.11 to the Company’s Form S-1 filed on October 11, 2019)
10.12+ |  | Reagent Supply and Technology Transfer Agreement by and between 89Bio Ltd. and Teva Biotech GmbH, dated as of April 16, 2018, as amended (filed with the SEC as Exhibit 10.12 to the Company’s Form S-1 filed on October 11, 2019)

10.13+ |  | Sublicense Agreement by and between 89Bio Ltd. and ratiopharm GmbH, dated as of April 16, 2018 (filed with the SEC as Exhibit 10.13 to the Company’s Form S-1 filed on October 11, 2019)
10.14+ |  | Master Services Agreement by and between 89Bio Ltd. and Biotechpharma UAB, dated as of May 7, 2018, as amended (filed with the SEC as Exhibit 10.14 to the Company’s Form S-1 filed on October 11, 2019)
10.15 |  | Office Lease by and between 89bio, Inc. and King Family Irrevocable Trust, dated as of December 5, 2019 (filed with the SEC as Exhibit 10.15 to the Company’s Annual Report on Form 10-K filed on March 18, 2020)
10.16 |  | Loan and Security Agreement, dated as of April 7, 2020, among Silicon Valley Bank, the Lenders party thereto, 89bio, Inc., 89bio Management, Inc. and 89Bio Ltd. (filed with the SEC as Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on April 13, 2020)
16.1 |  | Letter from Deloitte & Touche LLP, dated April 21, 2020 (filed with the SEC as Exhibit 16.1 to the Company’s Current Report on Form 8-K filed on April 23, 2020)
21.1+ |  | List of subsidiaries (filed with the SEC as Exhibit 21.1 to the Company’s Form S-1 filed on October 11, 2019)
23.1* |  | Consent of Independent Registered Public Accounting Firm
23.2* |  | Consent of Independent Registered Public Accounting Firm
31.1* |  | Certification of Principal Executive Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934.
31.2* |  | Certification of Principal Financial Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934.
32.1# |  | Certification of Principal Executive Officer and Principal Financial Officer Pursuant to 18 U.S.C. Section 1350.
101.INS |  | XBRL Instance Document
101.SCH |  | XBRL Taxonomy Extension Schema Document
101.CAL |  | XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF |  | XBRL Taxonomy Extension Definition Linkbase Document
101.LAB |  | XBRL Taxonomy Extension Label Linkbase Document
101.PRE |  | XBRL Taxonomy Extension Presentation Linkbase Document

* | Filed herewith.

+ | Indicates management contract or compensatory plan.

† | Portions of the exhibit have been omitted for confidentiality purposes.

88

# | Furnished herewith and not deemed to be “filed” for purposes of Section 18 of the Exchange Act, and shall not be deemed to be incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act.

Item 16. Form 10-K Summary.

None.

89

SIGNAT URES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this Report to be signed on its behalf by the undersigned, thereunto duly authorized.

|  | 89bio, Inc.
Date: March 24, 2021 |  | By: | /s/ Rohan Palekar
|  |  | Rohan Palekar
|  |  | Chief Executive Officer and Director (principal executive officer)
Date: March 24, 2021 |  | By: | /s/ Ryan Martins
|  |  | Ryan Martins
|  |  | Chief Financial Officer (principal financial and accounting officer)

90

POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below hereby constitutes and appoints Rohan Palekar, Ram Waisbourd and Ryan Martins, and each of them, the true and lawful attorneys-in-fact and agents of the undersigned, with full power of substitution and resubstitution, for and in the name, place and stead of the undersigned, to sign in any and all capacities (including, without limitation, the capacities listed below), this Annual Report on Form 10-K, any and all amendments thereto, and to file the same, with all exhibits thereto, and all other documents in connection therewith, with the Securities and Exchange Commission, and hereby grants to such attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and anything necessary to be done to enable the registrant to comply with the provisions of the Securities Exchange Act and all the requirements of the Securities and Exchange Commission, as fully to all intents and purposes as the undersigned might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or any of them, or their or his or her substitute, or substitutes, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, this Report has been signed below by the following persons on behalf of the Registrant in the capacities and on the dates indicated.

Name |  | Title |  | Date
/s/ Rohan Palekar |  | Chief Executive Officer and Director |  | March 24, 2021
Rohan Palekar |  | (principal executive officer) |  |
/s/ Ryan Martins |  | Chief Financial Officer |  | March 24, 2021
Ryan Martins |  | (principal financial and accounting officer) |  |
/s/ Steven Altschuler |  | Director |  | March 24, 2021
Steven Altschuler, M.D. |  |  |  |
/s/ Derek DiRocco |  | Director |  | March 24, 2021
Derek DiRocco, Ph.D. |  |  |  |
/s/ Gregory Grunberg |  | Director |  | March 24, 2021
Gregory Grunberg, M.D. |  |  |  |
/s/ Michael Hayden |  | Director |  | March 24, 2021
Michael Hayden, M.B., Ch.B., Ph.D. |  |  |  |
/s/ Anat Naschitz |  | Director |  | March 24, 2021
Anat Naschitz |  |  |  |
/s/ Lota Zoth |  | Director |  | March 24, 2021
Lota Zoth, C.P.A. |  |  |  |

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