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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

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FORM 10-K

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(Mark one)

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

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For the fiscal year ended December 31, 2021

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OR

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

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For the transition period from: to

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Commission File No. 001-37463

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GLAUKOS CORPORATION

(Exact name of registrant as specified in its charter)

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| ​ |
Delaware | ​ | 33-0945406
(State or other jurisdiction of incorporation or organization) | ​ | (I.R.S. Employer Identification No.)
​ | ​ | ​
229 Avenida Fabricante San Clemente, California | ​ | 92672
(Address of principal executive office) | ​ | (Zip Code)

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(949) 367-9600

(Registrant’s telephone number, including area code)

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

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​ | ​ | ​
Title of each class | Trading Symbol(s) | Name of each exchange on which registered
Common Stock | GKOS | New York Stock Exchange

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

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

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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 ☒

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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 ☐

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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 ☐

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Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company or an emerging growth company. (See 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 ☐

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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. ☐

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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. ☒

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Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes ☐ No ☒

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As of June 30, 2021, the last business day of the registrant’s most recently completed second quarter, the aggregate market value of common stock held by non-affiliates of the registrant, based on the closing sales price for the registrant’s common stock as reported on The New York Stock Exchange, was $3,792 million.

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The number of shares of the Registrant’s common stock outstanding as of February 23, 2022 (latest practicable date) was 47,053,318 shares.

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DOCUMENTS INCORPORATED BY REFERENCE

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Portions of the Registrant's Proxy Statement for the 2022 Annual Meeting of Stockholders are incorporated herein by reference in Part III of this Annual Report on Form 10-K to the extent stated herein. Such Proxy Statement will be filed with the Securities and Exchange Commission within 120 days after the close of the registrant's fiscal year ended December 31, 2021.​

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Table of Contents

TABLE OF CONTENTS

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​ | ​ |
​ | ​ | PAGE
PART I | ​ | ​
Item 1. | Business. | 1
Item 1A. | Risk Factors. | 16
Item 1B. | Unresolved Staff Comments. | 31
Item 2. | Properties. | 32
Item 3. | Legal Proceedings. | 32
Item 4. | Mine Safety Disclosures. | 33
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PART II | ​
Item 5. | Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities. | 34
Item 6. | [Reserved]. | 36
Item 7. | Management’s Discussion and Analysis of Financial Condition and Results of Operations. | 37
Item 7A. | Quantitative and Qualitative Disclosures About Market Risk. | 51
Item 8. | Financial Statements and Supplementary Data. | 52
Item 9. | Changes in and Disagreements With Accountants on Accounting and Financial Disclosure. | 91
Item 9A. | Controls and Procedures. | 92
Item 9B. | Other Information. | 94
Item 9C. | Disclosure Regarding Foreign Jurisdictions that Prevent Inspections. | 94
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PART III | ​
Item 10. | Directors, Executive Officers and Corporate Governance. | 95
Item 11. | Executive Compensation. | 96
Item 12. | Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters. | 97
Item 13. | Certain Relationships and Related Transactions, and Director Independence. | 98
Item 14. | Principal Accountant Fees and Services. | 99
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PART IV | ​
Item 15. | Exhibits and Financial Statement Schedules. | 100
Item 16. | Form 10-K Summary | 103

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We use Glaukos, our logo, iStent, iStent inject, iStent infinite, iPrism, iDose, iPRIME, MIGS, Avedro, Photrexa, iLink, KXL, Epioxa, iLution, Retina XR and other marks as trademarks. This report contains references to our trademarks and service marks and to those belonging to other entities. Solely for convenience, trademarks and trade names referred to in this report, including logos, artwork and other visual displays, may appear without the ® or ™ symbols, but such references are not intended to indicate in any way that we will not assert, to the fullest extent under applicable law, our rights or the rights of the applicable licensor to these trademarks and trade names. We do not intend our use or display of other entities’ trade names, trademarks or service marks to imply a relationship with, or endorsement or sponsorship of us by, any other entity.

References throughout this document to the “Company,” “we,” “us,” “our,” or “Glaukos” refer to Glaukos Corporation and its consolidated subsidiaries.

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SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS AND INDUSTRY DATA

This Annual Report on Form 10-K contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended (Securities Act), and Section 21E of the Securities Exchange Act of 1934, as amended (Exchange Act). These statements are based on management’s beliefs and assumptions and on information currently available to management. Some of the statements under Item 1 - “Business,” Item 1A - “Risk Factors,” Item 7 - “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and elsewhere in this Annual Report on Form 10-K contain forward-looking statements. In some cases, you can identify forward-looking statements by the following words: “may,” “will,” “could,” “would,” “should,” “expect,” “intend,” “plan,” “anticipate,” “believe,” “estimate,” “predict,” “project,” “potential,” “continue,” “ongoing” or the negative of these terms or other comparable terminology, although not all forward-looking statements contain these words.

These statements involve risks, uncertainties and other factors that may cause actual results, levels of activity, performance or achievements to be materially different from the information expressed or implied by these forward-looking statements. Although we believe that we have a reasonable basis for each forward-looking statement contained in this Annual Report on Form 10-K, we caution you that these statements are based on a combination of facts and factors currently known by us and our projections of the future, about which we cannot be certain.

In addition, you should refer to the “Risk Factors” section of this Annual Report on Form 10-K for a discussion of important factors that may cause actual results to differ materially from those expressed or implied by the forward-looking statements. As a result of these factors, we cannot assure you that the forward-looking statements in this Annual Report on Form 10-K will prove to be accurate. Furthermore, if the forward-looking statements prove to be inaccurate, the inaccuracy may be material. In light of the significant uncertainties in these forward-looking statements, you should not regard these statements as a representation or warranty by us or any other person that we will achieve our objectives and plans in any specified time frame, or at all. We undertake no obligation to publicly update any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

This Annual Report on Form 10-K contains market data and industry forecasts that were obtained from industry publications. These data involve a number of assumptions and limitations, and you are cautioned not to give undue weight to such information. Although we believe that the industry publications on which the market and industry statements are based are reliable and we are not aware of any misstatements regarding any market data or industry forecasts presented herein, we have not independently verified any of the third party information. Statements in this Annual Report on Form 10-K regarding our market position, market opportunity, market size and our general expectations involve risks and uncertainties and are subject to change based on various factors, including those discussed under Item 1A - “Risk Factors” and Item 7 - “Management’s Discussion and Analysis of Financial Condition and Results of Operations” included elsewhere in this Annual Report on Form 10-K.​

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PART I

ITEM 1. BUSINESS

Overview

Glaukos is an ophthalmic medical technology and pharmaceutical company focused on developing novel therapies for the treatment of glaucoma, corneal disorders, and retinal disease. We first developed Micro-Invasive Glaucoma Surgery (MIGS) as an alternative to the traditional glaucoma treatment paradigm, launching our first MIGS device commercially in 2012, and have since developed a portfolio of technologically distinct and leverageable platforms to support ongoing pharmaceutical and medical device innovations. Products or product candidates for each of these platforms are designed to advance the standard of care through better treatment options across the areas of glaucoma, corneal disorders such as keratoconus, dry eye and refractive vision correction, and retinal diseases such as neovascular age-related macular degeneration (AMD), diabetic macular edema (DME), and retinal vein occlusion (RVO).

Ophthalmic diseases and disorders are a national and global health concern and, as the population ages, the number of individuals with vision impairment and blindness is increasing. Moreover, improving access to cost-effective tools is increasing the diagnosis of sight-threatening ocular diseases globally and driving demand for innovative products, technologies, and therapies that improve clinical outcomes, and provide ease of use and reliability. In response to the significant unmet needs that exist within ophthalmology we have designed commercial and development-stage solutions to provide ophthalmologists with various treatment options.

Our commercial solutions and development-stage product candidates include:

•MIGS products that primarily involve the insertion of a micro-scale device or drug delivery system designed to reduce intraocular pressure (IOP) by restoring the natural aqueous humor outflow pathways for patients suffering from glaucoma and MIGS biosensors to measure pressure within the eye;

•bio-activated pharmaceuticals that are intended to strengthen, stabilize, and reshape the cornea for patients impacted by corneal ectatic disorders such as keratoconus or refractive disorders;

•transdermal pharmaceuticals that are applied to the eyelid and designed to treat dry eye, presbyopia, glaucoma and other ocular surface diseases and disorders; and

•proprietary micro-invasive, bio-erodible sustained release drug delivery implants that are designed to elute pharmaceuticals over time to improve the vision of patients impacted by retinal diseases such as AMD, DME, and RVO;

Impact of COVID-19 Pandemic and Current Economic Environment

While the COVID-19 pandemic and subsequent economic slowdown materially impacted the global demand for our products starting March 2020, we began to see an early recovery toward more normalized levels for cataract and keratoconus procedures as early as May 2020, a trend that generally continued, with periodic volatility in certain geographies in which we operate, through December 31, 2021. Most recently the Omicron variant has led to a material increase in diagnosed cases worldwide, creating new government restrictions in select geographies and impacting elective procedures in hospital and ambulatory surgery center sites. Additionally, the COVID-19 pandemic has led to widespread staffing shortages, including in ambulatory surgery centers, which may also impact elective procedures. These trends accelerated at the end of December 2021 and continued through the date herein.

We continue to actively assess the impact of COVID-19 on our clinical trials and other pipeline products. The closure of ophthalmic practices and deferral of elective procedures beginning in the first quarter of 2020 in response to COVID-19 disrupted new patient enrollment in our ongoing clinical trials. While we cannot predict the full impact of

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COVID-19 on the timing of completion of our clinical trials and the expected regulatory approvals for our pipeline products, our disclosed targeted approval dates anticipate, to our best estimate, such impact.

Additionally, some of our vendors are continuing to experience supply challenges, both in the acquisition of raw materials as well as due to limited headcount resources, and we have experienced higher costs for certain raw materials. These challenges have led to delays and partial or unfulfilled deliveries of certain components needed for the manufacture of our products, in some cases requiring us to find second sources for materials. If these delays and partial or unfulfilled deliveries persist, they could impact our ability to ship some of our products to our customers, or bring some of our pipeline products to market, in a timely manner. We believe that much of these supply challenges and higher costs stem from the ongoing obstacles presented by COVID-19.

The ultimate impact of the COVID-19 pandemic on our operations going forward is unknown and will depend on future developments which are highly uncertain and cannot be predicted with confidence, including the duration and severity of the COVID-19 outbreak, the status of health and safety actions taken to contain its spread, the severity and transmission rates of new variants of COVID-19 such as the Omicron strain, the availability, distribution, and efficacy of vaccines for COVID-19, any additional preventative and protective actions that governments, or we, may take, any future surges of COVID-19 that may occur, the dynamics associated with the rollout of the COVID-19 vaccines, and how quickly and to what extent economic and operating conditions normalize within the markets in which we operate. For additional information, see the section titled Risks Related to Our Business within Item 1A. Risk Factors of this Annual Report on Form 10-K.

Recent Developments

2022 U.S. reimbursement rates

On November 2, 2021, the United States (U.S.) Centers for Medicare & Medicaid Services (CMS) published its final rules for 2022 Medicare physician fee payment rates and 2022 Medicare facility fee payment rates for services furnished in both the ambulatory surgery center and hospital outpatient settings (Final Rules). These Final Rules superseded the proposed rates that were issued by CMS in July 2021 which were much lower than the rates issued in the Final Rules. Compared to the 2021 reimbursement rates, the Final Rules contained a new, significantly lower physician fee related to the implantation of trabecular bypass stents, such as our iStent family of products, in conjunction with cataract surgery. Conversely, the facility fee schedule related to surgeries that include implantation of trabecular bypass stents, such as our iStent family of products, in conjunction with cataract surgery, slightly decreases reimbursements to an ambulatory surgery center and increases reimbursements to a hospital. We estimate that approximately 80% of procedures utilizing our trabecular micro-bypass technologies in the U.S. are performed in the ambulatory surgery center setting and the remaining estimated 20% of procedures are performed in the hospital. Additionally, the Final Rules established facility fee payment rates that were lower than anticipated for standalone insertion of an aqueous drainage device in the ambulatory surgery center and hospital settings, which would be the procedure that such facilities would use with our iStent infinite product, which is not yet approved by the U.S. Food & Drug Administration. These CMS reimbursement rates contained in the Final Rules took effect January 1, 2022.

U.S. Glaucoma volumes were negatively impacted during our third and fourth quarter of 2021 as typical customer ordering patterns were disrupted and trialing of competitive products increased in anticipation of the potential 2022 CMS physician and facility fee reimbursement rate decreases becoming effective as originally proposed in July 2021. The physician fee reimbursement rate as issued in the Final Rules may have an adverse impact on 2022 procedural iStent family product volumes, in conjunction with cataract surgery as well as on our 2022 U.S. combo-cataract Glaucoma revenues, gross profit, and net income, the full extent of which is not known at this time.

Attillaps License Agreement

On September 20, 2021, we announced that we had entered into a licensing agreement (Attillaps License Agreement) with Attillaps Holdings, Inc. (Attillaps) under which Attillaps granted us a global exclusive license to Attillaps’ proprietary library of investigational pharmaceutical compounds that target the eradication of Demodex mites, which are the root cause of Demodex blepharitis and often associated with meibomian gland dysfunction and related ophthalmic diseases. Under the Attillaps Licensing Agreement, we have the exclusive global right to research, develop, manufacture and commercialize products using certain acetylcholinesterase inhibitors for the treatment of ophthalmic

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diseases caused by Demodex mites. We paid $5.0 million upon the signing of the Attillaps License Agreement and will have ongoing milestone and royalty payment obligations depending on the success of the development, approval and commercialization of the compounds.

Settlement of Patent Litigation

On September 14, 2021, we entered into a settlement agreement (Settlement Agreement) with Ivantis, Inc. (Ivantis), pursuant to which we and Ivantis agreed to terminate the patent infringement lawsuit we had filed against Ivantis on April 14, 2018 in the U.S. District Court for the Central District of California, Southern Division (the Lawsuit). In the Lawsuit, we alleged that Ivantis’ Hydrus® Microstent device infringes our U.S. Patent Nos. 6,626,858 and 9,827,143. Pursuant to the terms of the Settlement Agreement, Ivantis has made cash payments totaling $60.0 million, $30.0 million of which was paid to us during the year ended December 31, 2021, and $30.0 million of which was paid to us in January 2022.

Additionally, Ivantis will make quarterly royalty payments to us in the amount of 10% of Ivantis’ Hydrus Microstent U.S. sales and any international sales supplied out of the U.S. beginning in the fourth quarter of 2021 through April 26, 2025, subject to a per-unit minimum payment. We and Ivantis have dismissed with prejudice all of our claims against each other in the Lawsuit, which was scheduled for trial beginning on or around September 28, 2021, and in related lawsuits in other forums and jurisdictions. The parties also have agreed to mutual licenses and covenants not to sue the other party for patent infringement relating to Ivantis’ Hydrus Microstent or our micro-stent devices.

Santen License Agreement

On May 18, 2021, we announced that we entered into a new development and commercialization license agreement with Santen Pharmaceutical Co., Ltd. (Santen) for the PreserFlo MicroShunt, superseding the previous collaboration and distribution agreements between the two parties. Under the new agreement, we obtain exclusive commercialization rights for the MicroShunt in the United States, Australia, New Zealand, Canada, Brazil, Mexico and the remainder of Latin America. The new agreement also provides us with control over development activities for the MicroShunt in these same territories, including clinical development and regulatory affairs activities in the United States following a transition period. We did not make any payment in connection with the execution of the license agreement; however, should we be successful in obtaining regulatory approval for the PreserFlo MicroShunt, we would be required to pay Santen a milestone payment, followed by royalties and other potential future milestones depending on the success of the commercialization of the product.

Intratus License Amendment

On April 14, 2021, we announced that we had entered into an amended licensing agreement with Intratus, Inc. (Intratus) under which Intratus granted us a global exclusive license to research, develop, manufacture and commercialize Intratus’ patented, non-invasive drug delivery platform for application in the treatment of presbyopia. The addition of presbyopia expands upon the existing agreement between us and Intratus announced on July 22, 2019. The amendment includes a mechanism to further expand the existing agreement to other indications, applying the active pharmaceutical ingredients being advanced by us in glaucoma, corneal disorders and presbyopia to new ophthalmic fields.

Products and Pipeline

We operate in one operating segment and our primary business activity is the development and commercialization of therapies across several end markets within ophthalmology. In an effort to provide greater visibility into our business, the following discussion is presented based on our three principal end markets within ophthalmology: glaucoma, corneal disorders and retinal diseases.

Glaucoma

Glaucoma is a group of eye diseases characterized by progressive, irreversible and largely asymptomatic vision loss in which elevated levels of IOP are often associated with optic nerve damage that can cause blindness. While some glaucoma patients do not experience an increase in IOP, it is widely considered a major risk factor in glaucoma’s progression, and reduction in IOP is the only clinically proven treatment for the disease. Elevated IOP occurs when aqueous humor is not circulating normally or properly draining from the front part of the eye.

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We have three primary commercialized products designed to treat mild-to-moderate open-angle glaucoma: the iStent, the iStent inject, and the iStent inject W. The iStent, the iStent inject, and the iStent inject W are FDA-approved micro-bypass stents that improve aqueous humor outflow and are inserted through the small corneal incision made during cataract surgery. Our iStent, a single stent device which reduces IOP by restoring the natural physiologic pathways for aqueous humor, was the first commercially available MIGS treatment solution. Our next generation iStent inject and iStent inject W devices include two stents pre-loaded in an auto-injection system designed to allow the surgeon to inject stents through a single corneal entry. The iStent, iStent inject, and iStent inject W procedures are currently reimbursed in the U.S. by Medicare and all major national private payors. The iStent technologies are commercially available in numerous countries, including Australia, Brazil, Canada and Japan and certain European Union (EU) and other countries, even though reimbursement may not always be available for all such procedures.

We are also developing several pipeline products for glaucoma, including the iStent infinite and iDose TR, neither of which have yet been approved for commercialization. The iStent infinite consists of three stents that are designed for use as a standalone procedure in glaucoma patients. In 2021, we submitted our 510(k) clearance application for the iStent infinite for the treatment of glaucoma patients who have failed prior surgical therapy and estimate that we will receive clearance in the first half of 2022.

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The iDose drug delivery system is a targeted injectable implant based on our micro-scale device-platform that is designed to continuously deliver therapeutic levels of medication from within the eye for extended periods of time. We completed patient enrollment and randomization in our Phase 3 clinical trials in 2021 for iDose TR and now anticipate submitting a new drug application (NDA) in 2022 with potential FDA approval of this product in 2023. Additionally, our glaucoma pipeline includes the next-generation extended release iDose (TREX); iDose (ROCK) which would include proprietary Rho Kinase inhibitor compounds from a research and development collaboration agreement with D. Western Therapeutics Institute; programs for our iLution platform; and the IOP Sensor which are still in a research and development (R&D) stage.

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In addition to our organic R&D efforts, we have licensed from Santen the PreserFlo MicroShunt. The MicroShunt is an ab-externo device being developed for treatment of glaucoma where IOP is uncontrolled with maximum tolerated medical therapy or where progression of the disease warrants surgery. Santen submitted a PMA application to the FDA in June 2020, and the FDA currently is reviewing additional input obtained from glaucoma surgeons to ensure a complete evaluation of the clinical data submitted in the PMA, and as such the timing of a potential approval, and U.S. commercial launch is currently unknown. We did commence initial commercial launch activity in Australia and Canada during the fourth quarter of 2021.

Corneal Disorders

The cornea, the eye’s outermost layer, is a clear, dome-shaped surface that functions best as a lens when the cornea is strong and shaped properly. The cornea is responsible for the majority of the eye’s total focusing power and corneal disorders, including ectasia, refractive vision errors and dry eye, among others, can cause vision impairment. Corneal ectatic disorders are comprised of a class of diseases characterized by an ectatic, or misshaped, cornea. Corneal ectasia is typically caused by a weakening of the cornea, which can be due to a number of factors, including genetic causes, adverse side effects from ophthalmic refractive procedures such as LASIK, or excessive eye rubbing. We are currently targeting corneal disorders with our bio-activated pharmaceuticals including keratoconus, and corneal ectasia following refractive surgery. Keratoconus is mostly a hereditary, degenerative ectatic disease that is often first seen in older children or young adults in which the typically round, dome-shaped cornea progressively thins and weakens, causing a cone-like corneal bulge due to normal internal pressure of the eye. Corneal ectasia following refractive surgery is a serious complication that involves the cornea becoming weakened following a refractive procedure, such as LASIK, with symptoms similar to naturally occurring keratoconus. Refractive vision errors, or the inability of the cornea to properly focus light, are prevalent in the U.S. and abroad and include disorders such as presbyopia and myopia. Presbyopia is a natural part of aging due to the hardening of the eye’s crystalline lens over time, resulting in a loss of lens elasticity or the ability of the lens to change shape in order to focus incoming light on the retina. Myopia, or nearsightedness, is a vision condition in which close objects are seen clearly, but objects farther away appear blurred, and is usually caused by an elongation of the eyeball or a cornea having too much curvature. Presbyopia affects nearly everyone over the age of 40 while myopia first occurs in school-age children and typically progresses until about age 20.

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Our pharmaceutical iLink platform uses a suite of novel single-use drug formulations that are bio-activated by our proprietary systems to address these corneal diseases. The iLink therapies, bioactivated upon the delivery of ultraviolet A (UVA) light to the cornea, induce a biochemical reaction called corneal collagen cross-linking, or corneal cross-linking (CXL). CXL strengthens, stabilizes and reshapes the cornea to treat corneal ectatic disorders. Our KXL System, which delivers UVA light to a large portion of the cornea, and Photrexa therapy, is approved by the FDA for use in the U.S. following removal of the epithelium (often referred to as “iLink epi-off”), a procedure familiar to ophthalmologists. In May 2019, patient enrollment in a pivotal Phase 3 clinical trial was completed to evaluate the safety and efficacy of our next generation pharmaceutical iLink therapeutic system for the treatment of keratoconus without the removal of the epithelium (often referred to as “iLink epi-on”). We expect a U.S. NDA submission during 2022 and potential approval of the iLink epi-on product in 2023. We also expect to advance a third generation iLink therapeutic system into clinical trials during 2022. Internationally, our pharmaceutical therapies can also be administered with the KXL System to address corneal weakening caused by refractive surgery such as LASIK. Our bio-activated pharmaceutical products may also offer a means of improving the vision of patients with presbyopia, myopia or other corneal diseases.

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We have also developed our iLution platform of cream-based drug formulations that are applied to the outer surface of the eyelid for dropless transdermal delivery of pharmaceutically active compounds for the treatment of eye disorders. Several iLution platform products leverage an exclusive global licensing arrangement with Intratus to research, develop, manufacture and commercialize a patented, non-invasive, transdermal drug delivery formulation designed for application on the eyelid in the treatment of dry eye disease, presbyopia, glaucoma, and other ocular surface diseases and disorders. In January 2022, we commenced patient enrollment in Phase 2 clinical trials of two investigational drug candidates for the treatment of signs and symptoms of dry eye disease (GLK-301) and presbyopia (GLK-302).

Lastly, in September 2021, we entered into a licensing agreement with Attillaps Holdings, Inc. (Attillaps) to research, develop, manufacture and commercialize Attillaps’ proprietary library of investigational pharmaceutical compounds that target the eradication of Demodex mites, which are the root cause of Demodex blepharitis and often associated with meibomian gland dysfunction and related ophthalmic diseases.

Retinal Diseases

Retinal diseases vary widely but universally affect the retina, a thin layer of tissue inside the back wall of the eye containing light-sensitive cells that convert light into neural signals. Most retinal diseases cause visual impairment, including blurred or distorted vision and vision loss. Our R&D efforts in our retinal franchise are focused on treating AMD, DME, RVO, and other retinal diseases. AMD is a progressive disease that occurs when the macula, the central portion of the retina, is impaired, which can result in severe vision problems. DME is highly prevalent among individuals with type 2 diabetes and is associated with DR, the impairment of small blood vessels in the retina caused by increased glucose levels. Advanced DR can lead to fluid leaking into the macula, which causes DME and severe vision impairment. RVO occurs when the flow of blood from the retina is blocked, often due to a blood clot blocking the retinal vein, which can result in severe vision problems.

We are developing sustained release pharmaceutical retinal platforms leveraging our expanded pharmaceutical and sustained drug delivery R&D capabilities, including Triamcinolone Acetonide SR, Multi-Kinase Inhibitor SR and Anti-VEGF SR. If commercialized, these platforms would be designed to treat AMD, DME, RVO, and other retinal diseases. The focus of our retinal research and development efforts is to develop potential treatment options with a longer duration-of-effect than current standards of care products.

Research & Development

We devote significant resources to our R&D efforts, which are focused on developing new products, and enhancing the effectiveness, ease of use, safety, and reliability of our commercialized products. Our R&D objectives are:

| ● | to advance glaucoma patient care through continuous improvement of our MIGS technologies through our iStent platform;

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| ● | to further enhance treatment options for keratoconus, while expanding iLink and CXL indications to include treatment for certain refractive and other corneal conditions;

| ● | to develop dropless, transdermal pharmaceutical therapies for dry eye disease, presbyopia, glaucoma and other corneal disorders; and

| ● | to leverage our expertise in sustained release pharmaceutical retinal platforms to identify and develop viable treatment options for retinal diseases such as AMD, DME and RVO.

A considerable portion of our R&D investment includes clinical trials and the collection of evidence that provide data for use in regulatory submissions and required post-market approval studies involving applications of our products. We expect our R&D and clinical expenditures to increase as we continue to devote significant resources to clinical trials and regulatory approvals of our pipeline products. We currently conduct R&D activities primarily in the U.S. but are expanding our clinical capabilities to sites internationally.

Sales and Marketing

Our global sales efforts and promotional activities are currently aimed at ophthalmic surgeons and other eye care professionals. Our primary customers include ambulatory surgery centers, hospitals and physician private practices. In the U.S., we sell the majority of our products through a direct sales organization. Internationally, we sell our products through direct sales organizations in seventeen countries and a network of distribution partners in other markets where we do not have a direct commercial presence or maintain a modest commercial presence. In 2021, sales to customers inside U.S. and internationally accounted for 76% and 24% of our net sales, respectively. No single customer or distributor accounted for more than 10% of our total net sales in 2021. For the year ended December 31, 2021, our iStent technologies, the iStent, the iStent inject, and the iStent inject W and related accessories, which comprise our key iStent platform, accounted for approximately 79% of our net sales, while our iLink therapies accounted for approximately 21% of our net sales.

Competition

The medical technology and pharmaceutical industries are highly competitive. We may compete with many companies, including divisions of companies much larger than us that may have greater resources and name recognition, and smaller companies that compete against specific products or in certain geographies. Furthermore, new product development, discoveries, and technological change characterize the areas in which we compete. Our present or future products could be rendered obsolete as a result of advances by one or more of our present or future competitors or by other surgical or pharmaceutical therapy development. We must continue to develop and commercialize new products, technologies and therapies to remain competitive in the ophthalmology industry. We believe that we compete primarily on the basis of clinical superiority supported by extensive data and innovative features that enhance patient benefit, product performance, and safety.

The ophthalmic segment of the medical technology and pharmaceutical industries is dynamic and subject to significant change due to cost-of-care considerations, regulatory reform, industry and customer consolidation and evolving patient needs. The ability to provide products, technologies and therapies that demonstrate value, are reimbursed through government or third-party payors, improve clinical outcomes and provide ease of use and reliability is becoming increasingly important for companies within ophthalmology.

In glaucoma, our MIGS offerings primarily compete against Ivantis (which was acquired by Alcon in January 2022), however there are a considerable number of large and small companies providing more invasive surgical glaucoma technologies, laser-based therapies, and pharmaceuticals that may provide indirect competition or with whom we may compete should our broad clinical development pipeline be approved and commercialized. In corneal disorders, we have, under an orphan drug designation, the only FDA approved bio-activated pharmaceutical therapy for the treatment of keratoconus but globally we compete against numerous providers of corneal crosslinking therapies such as PeschkeTrade GmBH. Our corneal disorder pipeline, if approved, would vastly expand our competition to numerous large companies such as AbbVie Inc., Alcon and Johnson & Johnson, as well as some small companies that provide medical technology and pharmaceutical therapies for several areas including dry eye and refractive conditions. Our

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retinal health pipeline, if approved, may face substantial competition from large pharmaceutical companies such as AbbVie Inc., Novartis AG, Genentech/Roche, Regeneron and Bayer, and there are also a considerable number of large and small companies with development efforts in the field.

Facilities, Manufacturing and Distribution

Our corporate headquarters and our manufacturing operations for the iStent, iStent inject and iStent inject W are located in an approximately 98,000 square foot campus in San Clemente, California which is comprised of two main buildings. Our pharmaceutical therapies for keratoconus are primarily manufactured and supplied by third parties in the U.S. and Germany. We lease approximately 27,000 square feet of office and laboratory space in Waltham, Massachusetts, pursuant to a lease that expires in 2023, and our manufacturing operations for the majority of our proprietary systems are located in approximately 60,000 square feet of space located in Burlington, Massachusetts under a lease that expires on July 31, 2033 and contains one option to extend for a five-year period at market rates. In the first quarter of 2022, we relocated certain administrative, laboratory, R&D and warehouse space to three office buildings, comprising approximately 160,000 rentable square feet of space, located in Aliso Viejo, California (Aliso Facility). The term of the Aliso Facility lease commenced on May 1, 2019 and will continue for thirteen years, with an option to extend the lease for two additional five-year periods at market rates. We currently intend to maintain manufacturing facilities for the iStent, iStent inject, and iStent inject W at our San Clemente location for the foreseeable future. Our international subsidiaries also lease facilities in Australia, Brazil, Canada, Germany, Japan and the United Kingdom.

Intellectual Property

The strength of our competitive position depends substantially upon our ability to obtain and enforce intellectual property rights protecting our technology both domestically and internationally. We rely on a combination of intellectual property rights, including patents, trademarks, service marks, copyrights, trade secrets and other similar intellectual property, as well as customary contractual protections and security measures used to protect our proprietary, trade secret information.

In the aggregate, our intellectual property assets are of material importance to our business. We are significantly dependent on our patent and other intellectual property rights and the failure to protect such rights could negatively impact our ability to sell current or future products or prohibit us from enforcing our patents or other intellectual property rights against others. For additional information see the section titled Risks Related to Our Intellectual Property within Item 1A. Risk Factors of this Annual Report on Form 10-K.

As of December 31, 2021, we owned or exclusively licensed in certain fields of use over 300 issued patents, pending U.S. patent applications, issued foreign patents and pending foreign patent applications. We may, from time to time, choose to acquire or license additional patents and patent applications, or we may choose to abandon, sell, or license certain Company patents and patent applications, depending on our needs. The issued patents that protect our commercial products and current product pipeline expire between 2022 and 2038.

Government Regulation

Our products and operations are subject to extensive and rigorous regulation by federal, state, and local authorities, as well as foreign regulatory authorities. These governmental agencies regulate, among other things, the research, development, testing, manufacturing, approval, labeling, storage, recordkeeping, advertising, promotion and marketing, distribution, post approval monitoring and reporting, and import and export of medical devices and drugs (including drug/device combination products) in their respective jurisdictions to assure the safety and effectiveness of medical products and pharmaceuticals for their intended use. In general, there has been a trend of increased regulation of medical device and drug products, which has resulted in, and will likely continue to result in, increased prices to bring new products to market.

U.S. Regulation & Reimbursement

The FDA has broad regulatory authority over medical devices and drugs in the U.S. The FDA regulates, among other things, product safety, efficacy, manufacturing, advertising, labeling and safety reporting.

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Medical Device Requirements

Each medical device commercially distributed in the United States requires one of the following: (i) exemption from or clearance under a 510(k) premarket notification; (ii) approval under a Premarket approval (PMA) application; or (iii) approval of a de-novo classification petition.

The FDA classifies medical devices into one of three classes—Class I, Class II or Class III—depending on the degree of risk associated with each medical device and the extent of manufacturing and regulatory control needed to ensure its safety and effectiveness. Class III devices, which include our iStent products that produce the majority of our revenue, are deemed to pose the greatest risk, such as life-sustaining, life-supporting or implantable devices and devices deemed not substantially equivalent to a predicate device that the FDA has already cleared for marketing. Class III devices require FDA approval of the more demanding PMA application before marketing of the device can proceed. While the iStent, iStent inject and the PreserFlo MicroShunt are categorized as Class III devices and thus would generally be subject to the more rigorous PMA approval pathway, the FDA determined that an appropriate predicate device exists for the iStent infinite and that 510(k) premarket notification would be sufficient.

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PMA Approval Pathway

In a PMA application process, the manufacturer must demonstrate that the device is safe and effective for its intended use, and the PMA must be supported by extensive data, including data from preclinical studies and human clinical trials. If the FDA accepts the application for review, it has 180 days under the Federal Food, Drug, and Cosmetic Act (FDCA) to complete its review of a PMA, although in practice, the FDA’s review can take up to several years. The FDA will generally conduct a pre-approval inspection of the applicant or its third-party manufacturers’ or suppliers’ manufacturing facility or facilities to ensure compliance with the FDA’s Quality System Regulation (QSR). Even after a PMA approval, the FDA may require post-approval conditions to ensure the safety and effectiveness of the device, including additional clinical studies or post-market surveillance. Failure to comply with the conditions of approval can result in material adverse enforcement action, including withdrawal of the approval. Certain changes to an approved device, such as changes in manufacturing facilities, methods, or quality control procedures, or changes in the design performance specifications, which may affect the safety or effectiveness of the device, require submission of a PMA supplement.

Clinical Trials of Medical Devices

Clinical trials are almost always required to support a PMA for a Class III device. All clinical investigations must be conducted in accordance with the FDA’s IDE regulations. If the device presents a “significant risk,” to human health, as defined by the FDA, the FDA requires the device sponsor to submit an investigational drug exemption (IDE) application to the FDA, showing with appropriate data that it is safe to test the device in humans and that the testing protocol is scientifically sound.

Regardless of the degree of risk presented by the medical device, clinical studies must be approved by, and conducted under the oversight of, an Institutional Review Board (IRB) for each clinical site. During a study, the sponsor and any clinical investigators are required to comply with the applicable FDA requirements. After a trial begins, the sponsor, the FDA or the IRB could suspend or terminate a clinical trial at any time for various reasons, including a belief that the risks to study subjects outweigh the anticipated benefits.

Post-Market Regulation

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After a device is approved for marketing, numerous and pervasive regulatory requirements continue to apply. These include:

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| ● | Establishment registration and device listing with the FDA;

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| ● | QSR requirements, which require manufacturers, including third-party manufacturers, to follow stringent design, testing, control, documentation and other quality assurance procedures during all aspects of the design and manufacturing process;

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| ● | Labelling, advertising and promotion regulations, which require that promotion is truthful, not misleading, fairly balanced and provide adequate directions for use and that all claims are substantiated, and also prohibit the promotion of products for unapproved or “off-label” uses and impose other restrictions on labeling;

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| ● | Approval of product modifications of approved devices that affect safety or effectiveness or that would constitute a major change in intended use of an approved device;

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| ● | Medical device reporting regulations, which require that a manufacturer report to the FDA if a device it markets may have caused or contributed to a death or serious injury, or has malfunctioned and the device or a similar device that it markets would be likely to cause or contribute to a death or serious injury, if the malfunction were to recur;

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| ● | Correction, removal and recall reporting regulations, which require that manufacturers report to the FDA field corrections and product recalls or removals if undertaken to reduce a risk to health posed by the device or to remedy a violation of the FDCA that may present a risk to health; and

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| ● | Post-market surveillance activities and regulations, which apply when deemed by the FDA to be necessary to protect the public health or to provide additional safety and effectiveness data for the device.

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The FDA has broad regulatory compliance and enforcement powers. If the FDA determines that we failed to comply with applicable regulatory requirements, it can take a variety of compliance or enforcement actions, which may result in any of the following sanctions:

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| ● | warning letters, untitled letters, fines, injunctions, consent decrees and civil penalties;

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| ● | recalls, withdrawals, or administrative detention or seizure of products;

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| ● | operating restrictions or partial suspension or total shutdown of production;

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| ● | refusing or delaying requests for approvals of new products or modified products;

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| ● | withdrawing 510(k) clearances or PMA approvals that have already been granted;

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| ● | refusal to permit the export or import of our products; or

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| ● | criminal prosecution.

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Drug Requirements

The development and commercialization of drug products is subject to extensive regulation by governmental authorities in the U.S. and other countries. Before marketing in the U.S., a drug must undergo rigorous preclinical and clinical studies and an extensive regulatory approval process implemented by the FDA under the FDCA. Several of our pipeline products, including our iDose implants and our iLution cream-based formulations, are drug products that are subject to this regulatory approval process.

Before commencing clinical studies in humans in the US, we must submit to the FDA an IND that includes, among other things, the general investigational plan and protocols for specific human studies and the results of preclinical studies. Once clinical studies have begun under the IND, they are usually conducted in three phases and under FDA oversight. These phases generally include the following:

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Phase 1. Introduction into patients or healthy human volunteers and is tested for safety, dose tolerance and pharmacokinetics.

Phase 2. Introduction into a limited patient population to assess the efficacy of the drug in specific, targeted indications, assess dosage tolerance and optimal dosage, and identify possible adverse effects and safety risks.

Phase 3. Expansion to further demonstrate clinical efficacy, optimal dosage and safety within an expanded patient population.

The results of drug development, preclinical studies and clinical studies must be submitted to the FDA as part of an NDA. The NDA also must contain extensive manufacturing information. The Prescription Drug User Fee Act (PDUFA) establishes timeframes for FDA review of NDAs and the 2007 Food and Drug Administration Amendments Act gave the FDA authority to require implementation of a formal Risk Evaluation and Management Strategy to ensure that the benefits of a drug outweigh its risks. At the end of the review period, the FDA communicates either approval of the NDA or a complete response listing the application’s deficiencies.

As part of the NDA approval, the FDA may require post-marketing studies, sometimes referred to as Phase 4 studies, to monitor the safety and effectiveness of approved drugs, which may limit further marketing of the drug based on the results of these post-marketing studies.

If regulatory approval for a drug is obtained, the marketing of the drug will be limited to those diseases and conditions approved by FDA and for which the drug was shown to be effective, as demonstrated through clinical studies and specified in the drug’s labeling. Even if this regulatory approval is obtained, a marketed drug, its manufacturer and its manufacturing facilities are subject to continual review and periodic inspections by the FDA. The FDA ensures the quality of approved drugs by carefully monitoring manufacturers’ compliance with its current Good Manufacturing Practice (cGMP) regulations, which contain minimum requirements for the methods, facilities, and controls used in manufacturing, processing, and packaging of a drug. The FDA may withdraw drug approval if compliance with post-marketing regulatory standards is not maintained or if safety or quality issues are identified after the drug reaches the marketplace.

The FDA has recently determined that products previously regulated as drugs, which are comprised of a drug constituent part and a device part, may become subject to regulation as drug-led combination products. This may impact some of our pipeline products, such as our iDose drug-eluting implants. These products that are considered to be drug-device combination products will require review and coordination by FDA’s drug and device centers prior to approval, which may delay approval. In the U.S., a combination product with a drug primary mode of action generally would be reviewed and approved pursuant to the drug approval processes under the FDCA. In reviewing the approval application for such a product, however, FDA reviewers in the drug center will consult with their counterparts in the device center to ensure that the device component of the combination product meet applicable requirements regarding safety, effectiveness, durability and performance. Under FDA regulations, combination products are subject to cGMP requirements applicable to both drugs and devices, including the Quality System (QS) regulations applicable to medical devices.

We are also subject to various laws and regulations regarding laboratory practices, the experimental use of animals and the use and disposal of hazardous or potentially hazardous substances in connection with our research. In each of these areas, as above, the FDA and other regulatory authorities have broad regulatory and enforcement powers, including the power to withdraw approvals.

Health Care Regulatory Laws

Additional laws and regulations also govern our business operations and products in the U.S., including among others:

| ● | the federal health care Anti-Kickback Statute which prohibits, among other things, persons from knowingly and willfully soliciting, receiving, offering or paying remuneration, directly or indirectly, in cash or in kind, to induce or reward either the referral of an individual for, or the purchase, lease, order,

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|  | arrangement for, or recommendation of, items or services for which payment may be made, in whole or in part, under federal health care programs;

| ● | the federal civil False Claims Act prohibits, among other things, knowingly presenting or causing the presentation of a false or fraudulent claim for payment of government funds, or knowingly making, using, or causing to be made, a false record or statement material to a false or fraudulent claim to avoid, decrease or conceal an obligation to pay money to the federal government. False Claims Act liability is significant in the healthcare industry because the statute provides for treble damages and significant mandatory penalties per false claim or statement for violations (adjusted annually for inflation);

| ● | federal and state laws and regulations that govern the collection, dissemination, security, use, disclosure and confidentiality of patient-identifiable health and other proprietary and personally-identifiable information, in particular, the Health Insurance Portability and Accountability Act of 1996 (HIPAA), as amended by the Health Information Technology for Economic and Clinical Health Act of 2009 (HITECH). HIPAA created federal criminal statutes that prohibit, among other actions, knowingly and willfully executing, or attempting to execute, a scheme to defraud any healthcare benefit program; and

| ● | the Physician Payments Sunshine Act, which requires applicable manufacturers like us to report annually to the Centers for Medicare and Medicaid Services (CMS) information related to payments and other “transfers of value” made to physicians and teaching hospitals, and ownership and investment interests held by physicians and their immediate family members. For reports beginning in 2022, applicable manufacturers also will be required to report information regarding such payments and transfers of value provided in 2021 to physician assistants, nurse practitioners, clinical nurse specialists, certified nurse anesthetists, and certified nurse-midwives.

Certain states also mandate implementation of corporate compliance programs, require adherence to the industry’s voluntary compliance guidelines, impose restrictions on manufacturer marketing practices, require registration or licensing of manufacturers and their sales representatives, and/or require tracking and reporting of gifts, compensation, and other remuneration to healthcare professionals and entities.

Additionally, some states have proposed or enacted legislation that will create new data privacy and security obligations for certain entities, such as the California Consumer Privacy Act (CCPA) that went into effect January 1, 2020, the California Privacy Rights Act approved in November 2020 and that will be effective in January 2023, the Virginia Consumer Data Protection Act enacted on March 2, 2021 and the Colorado Privacy Act enacted on July 8, 2021. Violations of these laws, or the health care regulatory laws described above, may subject us to administrative, civil, and criminal penalties, including imprisonment of individuals, the imposition of significant fines, monetary penalties, and damages, exclusion from participation in (or reimbursement for our products from) federal health care programs like Medicare or Medicaid, imposition of compliance obligations or monitoring, curtailment or restructuring of our operations, and damage to our reputation.

Reimbursement

Ambulatory surgery centers, hospitals and physician private practices that purchase our medical device products typically bill various third-party payors, such as government programs, private insurance plans and managed care programs, to cover all or a portion of the costs and fees associated with the therapeutics or procedures in which our products are used and bill patients for any applicable deductibles or co-payments. In the U.S., physicians are typically paid separately from the facility for surgical procedures involving our products. In the U.S., there are distinct billing codes that are used by healthcare providers to report the provision of medical procedures and the use of supplies for specific patients to payors. There are different categories of Current Procedural Terminology (CPT) codes (Category I, II and III) based on the procedure or supply. For 2022, the temporary Category III CPT codes associated with payment rates for existing iStent-related procedures converted to permanent Category I codes for facility fee and physician fee payments furnished in both the hospital outpatient and ambulatory surgery center settings. As compared to the payments rates in effect in 2021 under the Category III CPT code, the CMS 2022 Medicare payment rates reflect a significantly lower physician fee involving procedures of the implantation of trabecular bypass stents, such as our iStent family of products, in conjunction with cataract surgery, while the facility fee schedule related to reimbursement for surgeries that

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include implantation of trabecular bypass stents, such as our iStent family of products, in conjunction with cataract surgery, reflects a slight decrease in payment rate to an ambulatory surgery center, and an increase in reimbursements to a hospital. We estimate that approximately 80% of procedures utilizing our trabecular micro-bypass technologies in the U.S. are performed in the ambulatory surgery center setting and the remaining estimated 20% of procedures are performed in the hospital. Even though a permanent billing code has been assigned to a product, there is no guarantee that coverage will be provided.

Additionally, effective in 2022, we obtained a temporary Category III CPT code associated with payment rates for facility fee payments that are lower than anticipated for standalone insertion of an aqueous drainage device in the ambulatory surgery center and hospital setting, which would be the procedure that such facilities would use with our iStent infinite product, which is not yet approved by the U.S. Food & Drug Administration. Prior to expiration of a temporary code, there are two options: submit an application to convert a temporary code to a permanent code or submit an application for a five-year extension of the temporary code. In connection with a transition to a permanent code, both the physician fee and facility fee associated with the procedures using our iStent infinite product will be reevaluated. In some cases, the physician fees and/or facility fees have been decreased at the time codes are transitioned from temporary to permanent.

There is no published Medicare payment schedule at the national level for physician payment amounts for temporary Category III CPT code products. The physician payment rate is left to the discretion of the regional Medicare Administrative Contractors (MACs), with each MAC separately determining coverage and no assurance that coverage and adequate reimbursement will be obtained from, or maintained by, the MACs. MACs have in the past, and may in the future, change coverage terms.

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Our Photrexa pharmaceutical therapy has received a permanent healthcare common procedure coding system J code and we have obtained temporary Category III CPT code for the professional fees associated with CXL.

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In the U.S., no uniform policy of coverage and reimbursement exists among third-party payors; coverage and reimbursement can differ significantly from payor to payor. In addition, payors continually review new products for possible coverage and existing products for changes in coverage and can, without notice, deny coverage.

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International Regulation & Reimbursement

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In addition to regulations in the U.S., we are subject to a variety of regulations in other jurisdictions governing clinical trials, commercial sales and distribution of our products and reporting of payments to physicians. Whether or not we obtain FDA approval for a product, we must obtain authorization before commencing clinical trials or obtain marketing authorization or approval of a product under the comparable regulatory authorities of countries internationally. The approval process varies from country to country and the time may be longer or shorter than that required for FDA approval. The requirements governing the conduct of clinical trials, product licensing, pricing and reimbursement vary greatly from country to country. In addition, certain countries have adopted transparency legislation that requires us to report contracts with or payments made to physicians in those countries and many have enacted anti-kickback laws and regulations, which generally prohibit the offer, receipt, or payment of remuneration in exchange for or to induce the use of our products.

Similar to the trend within the U.S., other major international markets are also moving toward more stringent regulatory frameworks for medical device and drug products. For example, in May 2017, the EU adopted a new regulatory scheme for medical devices under the Medical Device Regulation (MDR). The MDR became effective in May 2021 with a transition period through May 2024 at the latest, and will bring significant new requirements for many medical devices, including enhanced requirements for clinical evidence and documentation, increased focus on device identification and traceability, new definitions and registration of economic operators throughout the distribution chain, and additional post-market surveillance and vigilance, which could result in substantial additional expense.

The EU has also adopted increasingly stringent data protection and privacy rules that have and will continue to have a substantial impact on the use of patient data across the healthcare industry. The EU General Data Protection Regulation, or GDPR, became effective in May 2018 and applies across the EU (with the exception of the United Kingdom, which has adopted the UK Data Protection Act 2018 and a substantially equivalent version of the GDPR). The

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GDPR is wide-ranging in scope and imposes numerous requirements on companies that process personal data, including requirements relating to processing health and other sensitive data, obtaining consent of the individuals to whom the personal data relates, providing information to individuals regarding data processing activities, implementing safeguards to protect the security and confidentiality of personal data, providing notification of data breaches, and taking certain measures when engaging third-party processors. Failure to comply with the GDPR requirements may result in costly government enforcement actions, private litigation, and negative publicity, each of which could further result in reputation damage and our business, financial condition, results of operations or prospects could suffer.

Reimbursement

Internationally, reimbursement levels vary significantly by country and by region within some countries. Reimbursement is obtained from a variety of sources, including government-sponsored and private health insurance plans, and combinations of both. Some countries require additional clinical data before granting or expanding coverage and reimbursement for our products. In general, obtaining broad-based reimbursement and adequate payment for new technologies is more difficult in these markets than in the U.S. Many countries require new medical technologies to not only be safe and effective, but also to be able to demonstrate clinical benefits that outweigh the costs when compared to the standard of care. As in the U.S., reimbursement decisions can change, resulting in the elimination or reduction of reimbursement payments, which could adversely affect our financial results and our ability to invest in and grow our business.

Other

Our operations and many of the products we manufacture or sell are subject to extensive regulation by numerous other governmental agencies, both within the U.S. and internationally. In the U.S., apart from the agencies discussed above, our facilities, operations, employees, products (their manufacture, sale, import and export) and services are regulated by the Environmental Protection Agency, the Occupational Health & Safety Administration, the Department of Labor, Customs and Border Protection, the Department of Commerce, the Department of Treasury, the Department of Justice and others. State agencies also regulate our facilities, operations, employees, products and services within their respective states. Government agencies internationally also regulate public health, product registration, manufacturing, environmental conditions, labor, exports, imports, bribery and corruption and other aspects of our global operations.

These regulatory agencies and any current or future legislation could impact our business operations, reimbursement for our products, and the healthcare environment generally, which could adversely affect our ability to operate our business and our financial results. Compliance with these regulations has not had a material effect on our capital expenditures, earnings, or competitive position to date, but current or new legislation could have such an effect in the future. We cannot estimate the expenses we may incur to comply with potential new laws or changes to existing laws, or the other potential effects these laws may have on our business.

Human Capital Management

Glaukos is committed to developing a comprehensive, cohesive and positive employee experience. We consider talent attraction, development, engagement and retention a key driver of our business success. As of December 31, 2021, we had 727 full-time employees. Our Board of Directors, through the Compensation, Nominating and Governance Committee, retains direct oversight of our human capital management process, including demographics, talent development, employee retention, material aspects of employee compensation as well as diversity and inclusion recruitment, retention and compensation efforts. Additionally, the Compensation, Nominating and Governance Committee assists management with the implementation of the Company’s diversity strategy. We report on human capital matters at each regularly scheduled Board of Directors meeting and periodically throughout the year. The most significant human capital measures or objectives that we focus on in managing our business and our related human capital initiatives include the following:

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| ● | Workforce Diversity: We believe that truly innovative companies must find new ways to address the marketplace’s needs and the most effective innovation happens when our workforce represents a diversity of ideas and experiences. We embrace diversity in our employee recruiting, hiring, and

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|  | development practices. Our workforce was made up of 37% female employees and 42% racially or ethnically diverse employees as of December 31, 2021, with 32% and 37% of management positions being filled by female and racially or ethnically diverse individuals, respectively. During 2021, of the promotions that were earned within our workforce, 37% were earned by female employees and 52% were earned by racially or ethnically diverse employees.

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| ● | Inclusion and Belonging: We strive to create a work environment that emphasizes respect, fairness and dignity and do not tolerate discrimination or harassment. Individuals are evaluated based on merit, without discrimination, including discrimination based on race, color, religion, national origin, citizenship, marital status, gender (including pregnancy), gender identity, gender expression, sexual orientation, age, disability, veteran status, or other characteristics protected by law. We are committed to providing equal opportunities to every member of our workforce. To further celebrate the rich perspectives and experiences that arise from racial, ethnic, socio-economic, sexual, gender, physical and religious diversity, in 2021 we formed the Diversity, Equity and Inclusion Forum, comprised of Glaukos employees from across the globe who serve as an advisory group to help promote our inclusive culture.

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| ● | Health, Safety, and Wellness: We are dedicated to the safety and wellbeing of our employees. As the COVID-19 pandemic continued in 2021, we maintained a remote work environment for many of our employees, and continued to provide those employees with the resources necessary to effectively perform their job responsibilities. We retained the use of personal protective equipment and social distancing within our manufacturing and distribution operations. We also offered periodic voluntary COVID-19 viral testing to on-site employees. Further, we continued our COVID-19 pay policies, started in 2020, that provide our employees up to ten additional days of paid leave if they experience COVID-19 exposure or illness or to need time to care for exposed or ill family members.

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| ● | Philanthropy and Volunteerism: We created the Glaukos Charitable Foundation to assist the company in its philanthropic endeavors. Glaukos has donated over $10 million worth of its products to assist individuals in need. Additionally, we regularly hold local volunteer events and fundraising campaigns, including approximately 20 in 2021, to encourage our employees to give back to our communities, a commitment that we further support by offering employees paid time off for charitable volunteering. One of our more impactful volunteer events involved Glaukos employees adopting over 140 disadvantaged families globally to help provide a more special holiday experience.

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| ● | Training and Development: Employees receive regular development feedback through quarterly management reviews during which they are encouraged to cultivate new skills and opportunities. We coach our leaders to facilitate effective conversations and measure the effectiveness of these conversations by surveying our employees. In addition to training and development opportunities, all new employees are required to participate in substantial training seminars to introduce them to Glaukos’ business, pipeline and position within ophthalmology. We value knowledge and continuous improvement and conduct frequent informational sessions to further expose our employees to different departments, projects and business priorities. Additionally, in 2021 we launched a company-wide learning management system to streamline our training process and make learning opportunities even more accessible for our employees worldwide.

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| ● | Compensation and Benefits: To attract, retain and recognize talent, we aim to ensure merit-based, equitable compensation practices and strive to provide competitive compensation and benefit packages to our workforce. Employees at all levels are eligible for discretionary cash bonuses. To align employees with the organization’s performance, all U.S. employees are eligible to receive new hire and annual awards of restricted stock units. In furtherance of our commitment to internal pay equity and pay transparency, Glaukos conducts an annual pay equity analysis to evaluate compensation distribution, which analysis is also conducted in connection with new hires, promotions and our annual affirmative action planning process. Despite the difficulties presented by COVID-19, in recent years we expanded our global benefits programs, including broadening our employee assistance program globally, adding elderly and childcare and fertility treatment assistance and introducing parental leave for new and

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|  | adoptive parents for U.S. based employees, and expanding access to our trackless paid time off policy.

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| ● | For additional information on human capital matters, please see our most recent Sustainability Report, which is available on our website at www.glaukos.com. The information found on, or otherwise accessible through, our website is not incorporated by reference into, nor does it form a part of, this report or any other document that we file with the Securities and Exchange Commission (SEC).

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Available Information

Our Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and amendments to reports filed or furnished pursuant to Sections 13(a) and 15(d) of the Exchange Act, are available on our web site at www.glaukos.com, free of charge, as soon as reasonably practicable after the electronic filing of these reports with, or furnishing of these reports to, the SEC. In addition, the SEC maintains a web site at www.sec.gov that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC, including us.​

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Item 1A. Risk Factors

The risks discussed below are not the only ones facing our business but do represent those risks that we believe are material to us. Additional risks and uncertainties not presently known to us or that we currently deem immaterial may also harm our business. Please read the cautionary notice regarding forward-looking statements under the heading “Management’s Discussion and Analysis of Financial Condition and Results of Operations.”

Risks Related to Our Business

The reduced reimbursement rates established by CMS for 2022 have, and may continue to, materially and adversely impact our business operations and financial results.

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As described in Item 1, Business, “Recent Developments – 2022 reimbursement rates,” the United States (U.S.) Centers for Medicare & Medicaid Services’ (CMS’) Final Rules for 2022 impose a new, significantly lower physician fee and a slightly reduced facility fee related to the implantation of trabecular bypass stents, such as our iStent family of products, in conjunction with cataract surgery, furnished in the ambulatory surgery center setting. We believe these CMS physician fee and facility fee rate decreases disrupted traditional customer ordering patterns and have resulted in our customers’ trialing of competitive products, causing reduced glaucoma sales volumes in the U.S. during our third and fourth quarter of 2021. The reduction of the physician fee may continue to have an adverse impact on procedural iStent family product volumes, in conjunction with cataract surgery, in 2022, as well as on our U.S. combo-cataract glaucoma revenues, gross profit, and net income, the full extent of which is not known at this time.

​

Additionally, the Final Rules established facility fee payment rates for the procedure that hospitals and ambulatory surgery centers will use with Glaukos’ iStent infinite product, which is not yet approved by the FDA, that were lower than anticipated. The physician fee payment rate for this procedure will be set by the multi-state, regional contractors, or Medicare Administrative Contractors (MACs), responsible for administering Medicare claims, and is unknown at this time. This physician fee payment rate, alone or in combination with the standalone facility fee payment rate, may result in inadequate reimbursement and impact the use of this product, if and when approved.

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The COVID-19 pandemic has adversely affected, and could continue to materially and adversely affect, our business, results of operations, financial condition, liquidity, and cash flows.

​

While COVID-19 and its resulting variant viruses have had, and we expect them to continue to have, an adverse effect on our business, results of operations, financial condition, liquidity and cash flows, we are unable to predict the extent or nature of these impacts at this time.

​

To protect our employees and adhere to the guidance and orders of various governmental authorities, beginning in the first quarter of 2020 and continuing through December 31, 2021, we shifted the majority of our workforce to remote operations and implemented changes to our manufacturing and distribution operations to include the use of personal protective equipment and ensure social distancing. Further, in an effort to identify, and avoid further infection from, asymptomatic cases, we have required that any onsite individuals adhere to our social distancing and masking requirements. As our employees begin to return to onsite work, a process that began in January 2022, the return-to-work strategies we have adopted or may adopt, including masking, testing, vaccination or other requirements, may have an unanticipated impact on our employees that could be disruptive to our business and adversely impact our financial and operational results.

​

Additionally, we have experienced a number of COVID-19 cases among our workforce, and we could experience a wider-spread outbreak of COVID-19 in our manufacturing facilities, which could require us to temporarily shut down manufacturing operations and/or cause a disruption to, or shortage in, our workforce. If a widespread outbreak were to occur, we may experience delays in our responses to our customers and possible delays in shipments of our products, which could harm our customer relations and adversely impact our competitive positioning and sales. We have also experienced restrictions on the ability of our personnel to travel and access customers and clinical sites for training and support. Other potential disruptions include delays in approvals by regulatory bodies; delays in product development efforts; and further challenges to our capacity to manufacture, sell and support the use of our products.

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We continue to carefully manage our discretionary spending in response to COVID, which may slow the growth trajectory of the Company or require us to delay projects that could have benefitted the Company. In addition to the cost saving measures, we issued $287.5 million in aggregate principal amount of 2.75% convertible notes due 2027 (the Convertible Notes) in June 2020, the proceeds of which are expected to be used for working capital and general corporate purposes. As described in Item 1, Business, “Impact of COVID-19 Pandemic and Current Economic Environment,” some of our supply chain and development partners have experienced delays and unfulfilled deliveries of product due to COVID, both in raw material acquisition and due to lack of headcount resources. If these delays and partial or unfilled deliveries persist, they could impact our ability to ship some of our products to our customers, or bring some of our pipeline products to market, in a timely manner.

​

We cannot predict the timing and full impact of the pandemic on our future financial and operating results given the continued uncertainties associated with the pandemic, including the possibility of future surges of COVID-19, uncertainties about the severity and transmission rates of new more contagious and/or vaccine-resistant variants of COVID-19, the availability, distribution, public acceptance rate and efficacy of vaccines and therapeutics for COVID-19 and patient reluctance to seek primary care from optometrists and ophthalmologists or undergo medical procedures during or following the pandemic. Additionally, the COVID-19 pandemic has led to widespread staffing shortages, including in ambulatory surgery centers, which may also impact elective procedures. Restrictions on elective procedures and therapies and the closures of ophthalmic practices in an effort to halt the spread of COVID-19 have also impacted the progress of our pipeline products. For example, new patient enrollment in our iDose clinical trial slowed significantly but was completed in June 2021, which delayed the iDose approval timeline. Any further prolonged economic slowdown or reinstitution of stay-at-home or similar orders may cause additional delays in the progress of our pipeline products, including those in clinical trials. While we cannot predict the full impact of COVID-19 on the timing of completion of our clinical trials and the expected regulatory approvals of our pipeline products, our disclosed targeted approval dates anticipate, to our best estimate, such impact.

​

We have incurred significant losses since inception and our business requires substantial capital and operating expenditures to operate and grow. There can be no guarantee that we reach sustained profitability.

Since the Company’s inception in 1998, we have incurred significant operating losses. As of December 31, 2021, we had an accumulated deficit of approximately $365.2 million, principally from costs incurred in our clinical trial, R&D programs and from our general and administrative expenses. We have funded our operations to date from the sale of equity securities, including our June 2015 initial public offering (IPO), the issuance of notes payable, cash exercises of stock options and warrants to purchase equity securities, cash generated from commercial operations and the issuance of the Convertible Notes. To implement our global business strategies we need to, among other things, fund ongoing R&D activities, expand our manufacturing capabilities, grow our sales and marketing organization, enforce or defend our intellectual property rights, acquire companies or in-license products or intellectual property, and obtain regulatory clearance or approval to commercialize our existing products in international markets or to commercialize those currently under development in the U.S. and internationally. As a result, we expect our expenses to continue to increase as we pursue these objectives. While we believe we have sufficient cash to fund our operations for at least the next 12 months from the date our consolidated financial statements for the year ended December 31, 2021 are made publicly available, our ability to reach sustained profitability is highly uncertain, especially given our increasingly competitive landscape, which makes forecasting our sales more difficult.

Our success depends on our ability to continue to generate sales of our commercialized products and develop and commercialize additional products, which we may not be able to accomplish.

Our primary sales-generating commercial products have been the iStent, which we began selling in the U.S. in 2012, the iStent inject, which we began selling in the U.S. in the second half of 2018, and its successor, the iStent inject W, launched in the second half of 2020, as well as our Photrexa therapies, which we acquired in connection with our acquisition of Avedro, Inc. (Avedro) in November 2019. We expect to continue to derive a significant portion of our net sales from the iStent, the iStent inject models and the Photrexa therapies.

It is important that we continue to build a more complete product offering. Developing additional products is expensive and time-consuming. Even if we are successful in developing our additional pipeline products, including those

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currently in development, the success of our new product offerings is inherently uncertain and there can be no assurance that our products will produce net sales in excess of the costs of development. Any current or new products could also quickly be rendered obsolete by changing customer preferences or the introduction by our competitors of products embodying superior technologies, features or better product safety, quality or efficacy. Our competitors include large publicly traded companies or divisions of publicly traded companies and have more resources, greater name recognition, longer operating histories, more established relationships with healthcare professionals, customers and third-party payors, broader products lines, more established sales and marketing programs and distribution networks, and greater experience in obtaining regulatory clearance or approval. Additionally, our research programs, which are expensive and time-intensive, may fail to yield product candidates for clinical development despite showing initial promise. If we are unable to successfully commercialize additional products, our business prospects would be materially affected.

As our growth strategy turns increasingly global, we are, and will continue to be, subject to a variety of risks associated with our international operations, which could adversely impact our results of operations and financial condition.

Our existing foreign operations, as well as our planned international growth, expose us to additional uncertainty and risks beyond regulatory authorization and reimbursement levels. Internationally, we sell our products through direct sales organizations in seventeen countries and a network of third-party distribution partners in other markets. These international operations expose us and our subsidiaries and third-party distributors to a variety of risks including, without limitation, the following:

| ● | different, and in some cases more exacting and lengthy, regulatory approval processes, regulations and laws, and pricing and reimbursement systems;

| ● | reduced or varied protection for intellectual property rights or difficulties enforcing our intellectual property rights and defending against third-party threats and intellectual property enforcement actions against us, our distributors, or any of our third-party suppliers;

| ● | pricing pressure or longer sales and payment cycles;

| ● | different competitive dynamics, including smaller market sizes, which we may not be able to fully appreciate before entering certain foreign markets;

| ● | a shortage of high-quality regional sales managers, direct sales representatives and distributors, and the difficulties of managing foreign operations;

| ● | relative disadvantages compared to competitors with more recognizable names, longer operating histories and better established distribution networks and customer relationships;

| ● | political and economic instability, international terrorism and anti-U.S. sentiment, or the imposition of U.S. or international sanctions that could restrict or prohibit continued business;

| ● | changes in duties and tariffs, license obligations and other non-tariff barriers to trade;

| ● | scrutiny of foreign tax authorities that could result in significant fines, penalties and additional taxes;

| ● | different cultural norms which may impact how business is conducted;

| ● | laws and business practices favoring local companies;

| ● | difficulties in maintaining consistency with our internal guidelines;

| ● | difficulties in enforcing agreements and collecting receivables through foreign legal systems;

| ● | money laundering, bribery and corruption practices and breach of sanction regulations by third parties in our distribution network, which may be difficult for us to discover or prevent;

| ● | failures by our third-party partners to properly assist us with local guidance on operations, financial and other reporting, accounting, tax, payroll, legal and regulatory matters; and

| ● | the imposition of costly and lengthy new export licensing requirements and restrictions, particularly relating to technology.

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If we experience any of these risks, our sales in non-U.S. jurisdictions may be harmed, our results of operations would suffer, and our reputation and business prospects would be negatively impacted.

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If the supply and/or manufacture of our principal revenue-producing products, the iStent, the iStent inject models and our Photrexa therapies, is materially disrupted, it may adversely affect our ability to manufacture products and could reduce our gross margins and negatively affect our operating results.

Our sole manufacturing location for our iStent products is an approximately 98,000 square foot campus located in San Clemente, California, where we manufacture, inspect, package, release and ship nearly all of our iStent and iStent inject products. This is also the location where we conducted substantially all of our research and development (R&D) activities, customer and technical support, and management and administrative functions in 2021. In January 2022, we began to relocate our corporate administrative headquarters, along with certain laboratory, R&D and warehouse space, to a new facility in Aliso Viejo, California (Aliso Facility), as described in Item 1, Business, “Facilities, Manufacturing and Distribution.” If either of our San Clemente or Aliso Facility suffers a crippling event, or a force majeure event such as an earthquake, fire or flood, this could materially impact our ability to operate.

Additionally, we rely on a limited number of third-party suppliers, in some cases sole suppliers, to supply components for the iStent, the iStent inject models and our other pipeline products. If any one or more of our suppliers cease to provide us with sufficient quantities of components or drugs in a timely manner or on terms acceptable to us, we would have to seek alternative sources of supply. Because of factors such as the proprietary nature of our products, our domestic and international quality control standards and regulatory requirements including the FDA’s Quality System Regulation and Current Good Manufacturing Practices regulations, we may be unable to obtain components if our component suppliers are found to be in violation of such standards and we may have difficulty quickly engaging additional or replacement suppliers for some of our critical components, which could delay or impact our business, including the regulatory approval timelines as has happened with iLink Epioxa. If our manufacturing facilities or those of any of our component suppliers or contract facilities are found to be in violation of applicable laws and regulations or fail to adequately remediate any issues discovered during an audit, the FDA or other notified bodies could take enforcement action. Even if we are able to identify and qualify a suitable second source to replace one of our key suppliers, if necessary, that replacement supplier would not have access to our previous supplier’s proprietary processes and would therefore be required to develop its own, which could result in further delay. Despite our efforts to maintain an adequate supply of inventory, the loss of these suppliers, or their inability to provide us with an adequate supply of components or products, could cause delay in the manufacture of our products, thereby impairing our ability to meet the demand of our customers and causing significant harm to our business. Any disruption of this nature or increased expense could harm our commercialization efforts and adversely affect our operating results.

Our corneal health Photrexa therapies are produced by a small number of contract manufacturing organizations. The systems that bio-activate our Photrexa therapies are primarily manufactured in Burlington, Massachusetts. Any material disruption to the manufacture of our corneal health products, either our pharmaceuticals or their bio-activation systems, could also adversely affect our operating results and clinical efforts.

If the quality or delivery of our products does not meet our customers’ expectations, our reputation could suffer and ultimately our sales and operating earnings could be negatively impacted.

In the course of conducting our business, we have had to and must continue to adequately address quality issues associated with our products, including in our engineering, design, manufacturing and delivery processes, as well as issues in third-party components included in our products. Because our products are highly complex, the occurrence of performance issues may increase as we continue to introduce new products and as we rapidly scale up manufacturing to meet increased demand for our products. Although we have established internal procedures to minimize risks that may arise from product quality issues, there can be no assurance that we will be able to eliminate or mitigate occurrences of these issues and associated liabilities. In addition, identifying the root cause of performance or quality issues, particularly those affecting third-party components, may be difficult, which increases the time needed to address quality issues as they arise and increases the risk that similar problems could recur. Finding solutions to quality issues can be expensive and we may incur significant costs or lost revenue in connection with, for example, shipment holds, product recalls and warranty or other service obligations. In addition, quality issues can impair our relationships with new or existing customers or result in product liability suits against us, which may be expensive to defend or resolve and could impact the reimbursement coverage of our products, our product liability insurance rates and/or our cash reserves in the event our existing insurance coverage is insufficient. The occurrence of any of the foregoing could harm our reputation as a

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producer of high quality products, which could adversely affect our business, financial condition or results of operations.

Ophthalmic surgeons may not use our products if they do not believe they are safe, efficient, effective and preferable alternatives to other treatment solutions in the market or may use our products without being adequately trained, which could result in inferior clinical outcomes.

We believe that ophthalmic surgeons will not use our products unless they conclude that our products provide a safe, efficient, effective and preferable alternative to currently available treatment options. If ophthalmic surgeons determine that any of our products are not sufficiently effective, efficient or safe, whether based on longer-term patient studies or clinical experience or unsatisfactory patient outcomes or patient injury, our sales would be harmed. Surgeons may base such determination on patient outcomes that are the result of untrained or unqualified surgeons performing procedures for which they haven’t been trained. It is also possible that as our products become more widely used, latent defects could be identified, creating negative publicity and liability problems for us and adversely affecting demand for our products. If an increasing number of ophthalmic surgeons do not continue to adopt the use of our products, our operating and financial results will be negatively impacted.

Operating results could be unpredictable and may fluctuate significantly from quarter to quarter, which could adversely affect our business, financial condition, results of operations and the trading price of our common stock.

In addition to the impact of the COVID-19 pandemic, our net sales may experience volatility due to a number of factors, many of which are beyond our control, including, among other things, fluctuating demand, pricing pressures applicable to our products, Medicare payment rates established by CMS, commercialization of our new and existing products and the marketing of competitive products, results of clinical research and trials, regulatory approvals and legislative changes affecting our products, variances in the sales terms, supply chain and inventory management, shortage of raw materials, timing or volume of customer orders and the length of our sales cycle, which varies and may be unpredictable. As a result, you should not rely on our results in any past period as an indication of future results and you should anticipate that fluctuations in our quarterly and annual operating results may continue and could generate volatility in the price of our common stock. We believe that quarterly comparisons of our financial results should not be relied upon as an indication of our future performance.

If we fail to manage our anticipated growth effectively, we may not be able to meet customer demand for our products and our business could suffer.

Since the commercial launch of the iStent in 2012, we have seen significant period-to-period growth in our business, both organically and through transactions, and we must continue to grow in order to meet our business and financial objectives. However, continued growth may create numerous challenges, including, among others, new and increased responsibilities for our management team; increased competition; increased product demand which could strain our manufacturing capacity; the management of an increasing number of customer, supplier and other relationships; increased pressure on our operating, financial and reporting systems; entry into new international territories with unfamiliar regulations and business approaches; and the need to hire, train and manage additional qualified personnel. If we fail to manage any of these challenges effectively, our business may be harmed.

If we are unable to retain or recruit qualified personnel for growth, our business results could suffer.

We have benefited substantially from the leadership and performance of our senior management and other key employees. For example, our chief executive officer, as well as other key members of our senior management, has experience successfully developing novel technologies and scaling early-stage medical device and pharmaceutical companies to achieve profitability. We also rely on our qualified sales representatives and on consultants and advisors in our research, operations, clinical and commercial efforts to grow our business, develop and commercialize new products and implement our business strategies. Our success will depend on our ability to retain our current management, key employees and consultants and advisors, and to attract and retain qualified personnel in the future, including by providing competitive compensation and benefit programs, career advancement prospects and sufficient opportunities to develop leadership, managerial and other valuable skills. The loss of services of these personnel, which could occur without notice and without cause or good reason, could prevent or delay our growth plans and the implementation and

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completion of our strategic objectives, or divert management’s attention to seeking qualified replacements. Our employees, including our senior management, are not subject to non-competition agreements. Accordingly, the adverse effect of losing key personnel could be compounded by our inability to prevent them from competing with us.

We have and may continue to enter into acquisitions, collaborations, in-licensing agreements, joint ventures, alliances or partnerships with third parties that could fail.

We have and may continue to enter into acquisitions, collaborations, in-licensing agreements, joint ventures, partnerships or undertake one or more of these transactions in order to retain our competitive position within the marketplace or to expand into new markets. Examples include our acquisitions of DOSE and Avedro, as well as our licensing of Santen’s Preserflo MicroShunt, the Intratus drug delivery platform and the Attillaps pharmaceutical compounds. However, we cannot assure you that we will be able to successfully complete any future acquisition we may pursue, or that we will be able to successfully integrate any acquired business, product or technology in a cost-effective and non-disruptive manner. Our future successes will depend, in part, on our ability to manage an expanded business, which may pose substantial challenges for our management, such as the management and monitoring of new operations and associated increased costs and complexity. There can be no assurances that we will be successful in managing such expanded business or that we will realize the expected economies of scale, synergies and other benefits currently anticipated from recent or future acquisitions or strategic transactions. Additionally, these collaborations, joint ventures, and partnerships may fail to result in any commercialized product, including due to delays in or failures to obtain regulatory approvals, such as the approval delays with respect to the PreserFlo MicroShunt, and could require us to invest a substantial amount of resources only to ultimately fail. In addition, these arrangements may be terminated before we are able to realize net sales to sufficiently cover the costs associated therewith, which could materially impact our business. We cannot assure you that any such transaction would result in the benefits expected from the transaction, including revenue growth, increased profitability or an enhancement in our business prospects. Further, pursuing acquisitions, collaborations, in licensing agreements, joint ventures, alliances or partnerships with third parties, whether or not completed, is costly and time-consuming and could distract Company management from the operation of the business, which could negatively impact our operating results.

Failure to protect our information technology infrastructure against cyber incidents, network security breaches, service interruptions, or data corruption could materially disrupt our operations and adversely affect our business, operating results, or the effectiveness of our internal controls over financial reporting.

The efficient operation of our global business depends on our information technology systems, including telecommunications, the internet, network communications, email and various computer hardware and software applications. We rely on our information technology systems to effectively manage sales and marketing data, accounting and financial functions, inventory management, product development tasks, clinical data, customer service and technical support functions. Our information technology systems are vulnerable to damage or interruption from earthquakes, fires, floods and other natural disasters, terrorist attacks, power losses, computer system or data network failures, data corruption and security breaches or other cyber-based incidents, which we have experienced and which we continue to monitor. Cyber incidents can include ransomware, computer denial-of-service attacks, worms, and other malicious software programs introduced to our computers and networks, including intrusions that are disguised and evade detection for an extended period of time, phishing attacks, impersonation of authorized users, and efforts to discover and exploit any design flaws, bugs, security vulnerabilities or security weaknesses, as well as intentional or unintentional acts by employees or other insiders with access privileges, intentional acts of vandalism or fraud by third parties and sabotage. While none of the cyber incidents or service interruptions that we have experienced to date have had a material adverse impact on our business, financial condition or operations, we cannot assure that future incidents will not materially and adversely impact us. In addition, a variety of our software systems are cloud-based data management applications, hosted by third-party service providers whose security and information technology systems are subject to similar risks. The failure to protect either our or our service providers’ information technology infrastructure could disrupt our entire operation or result in decreased sales, increased overhead costs, product shortages, loss or misuse of proprietary or confidential information, intellectual property or sensitive or personal information, all of which could have a material adverse effect on our reputation, business, financial condition and operating results.

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Our enterprise resource planning (“ERP”) system, which was implemented in 2020, is integral to our ability to accurately and efficiently maintain our books and records, record transactions, and prepare our financial statements. Any disruptions or difficulties that may occur in connection with our ERP system (whether in connection with the regular operation, periodic enhancements or upgrades of such systems, or due to cyber incidents) could adversely affect our ability to provide services, fulfill contractual obligations, file reports with the SEC in a timely manner, operate our business or otherwise affect our controls environment. If our independent registered public accounting firm determines that we have a material weakness in our internal control over financial reporting, we could lose investor confidence in the accuracy and completeness of our financial reports, the market price of our common stock could decline, and we could be subject to sanctions or investigations by the New York Stock Exchange, the SEC, or other regulatory authorities. Any of these events could have an adverse effect on our business, operating results and financial condition.

Failure to comply with data privacy and security laws could have a material adverse effect on our business.

We are subject to state, federal and foreign laws relating to data privacy and security in the conduct of our business, including state breach notification laws, the Health Insurance Portability and Accountability Act, as amended by the Health Information Technology for Economic and Clinical Health Act of 2009, the European Union’s General Data Protection Regulation (GDPR), the UK Data Protection Act and the UK GDPR, and the California Consumer Privacy Act (CCPA), among others. These laws affect how we collect and use data of our employees, consultants, customers and other parties. These laws, as well as similar laws being enacted by other states and countries, impose substantial requirements that involve the expenditure of significant resources and the investment of significant time and effort to comply. We also rely on third parties to host or otherwise process some of this data. In some instances, these third parties have experienced failures to protect data privacy. Any failure by a third party to prevent security breaches could have adverse consequences for us. Our failure to comply with these laws or prevent security breaches of such data could result in significant liability under applicable laws, cause disruption to our business, harm our reputation and have a material adverse effect on our business.

We cannot be certain that our net operating loss tax carryforwards will be available to offset future taxable income.

At December 31, 2021, we had approximately $491.4 million, $328.4 million and $12.3 million of net operating loss (NOL) carryforwards for federal, state and foreign purposes, respectively. Federal NOL carryforwards incurred prior to 2018 begin to expire in 2024, while federal NOL carryforwards of $239.2 million will not expire but can only be used to offset 80 percent of future taxable income. The state and foreign NOL carryforwards begin to expire in 2022.

At December 31, 2021, we had federal and state R&D credit carryforwards of approximately $35.6 million and $18.4 million, respectively. Federal credits begin to expire in 2022, state credits of $4.1 million begin to expire in 2023, and state credits of $14.3 million carry over indefinitely. We continue to provide a valuation allowance against a portion of these tax attributes because we believe that uncertainty exists with respect to their future realization.

Utilization of these tax attributes may be subject to annual limitations under the Internal Revenue Code of 1986 (IRC) Section 382 and Section 383 if the Company experiences an ownership change. To the extent available, we intend to use these NOL and credit carryforwards to offset future taxable income and/or income tax liabilities associated with our operations. There can be no assurance that we will generate sufficient taxable income in the carryforward period to utilize the remaining tax attributes before they expire.

Risks Related to Indebtedness

The requirement that we service our indebtedness could limit the cash flow available for our operations and have other consequences that could adversely affect our business, and we may not have sufficient cash flow from our business to pay our debt obligations.

As of December 31, 2021, we had $287.5 million in principal amount of indebtedness as a result of the issuance of the Convertible Notes. We may also incur additional indebtedness to meet future financing needs. Interest payments, fees, covenants and restrictions under agreements governing our current or future indebtedness, including the indenture governing the Convertible Notes, could have significant consequences, including the following: impairing our ability to

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successfully continue to commercialize our current or future products; limiting our ability to obtain additional financing on satisfactory terms; increasing our vulnerability to general economic downturns, competition and industry conditions; requiring the dedication of a substantial portion of our cash flow from operations to service our indebtedness; inhibiting our flexibility to plan for, or react to, changes in our business; and diluting the interests of our existing stockholders if we issue shares of our common stock upon conversion of the Convertible Notes. The occurrence of any one of these events could have an adverse effect on our business, financial condition, operating results or cash flows and ability to satisfy our obligations under the indenture governing the Convertible Notes and any other indebtedness.

Our ability to make scheduled payments of the principal of, to pay interest on or to refinance the amounts payable under our current or future indebtedness, including the Convertible Notes, will depend on our operating and financial performance, which may be subject to economic, financial, competitive and other factors beyond our control. Our business may not generate cash flow from operations in the future sufficient to service our debt and make necessary investments in our business, and our cash needs may increase in the future. If we are unable to generate such cash flow, we may be required to adopt one or more alternatives, such as selling assets, restructuring debt or obtaining additional debt financing or equity capital on terms that may be onerous or highly dilutive. Our ability to refinance any future indebtedness will depend on the capital markets and our financial condition at such time. We may not be able to engage in any of these activities or secure desirable terms, which could result in a default on our debt obligations.

We may not have the ability to raise the funds necessary to settle conversions of the Convertible Notes in cash or to repurchase the Convertible Notes upon a fundamental change, and our future debt may contain limitations on our ability to pay cash upon conversion or repurchase of the Convertible Notes.

​

Noteholders may require us to repurchase their Convertible Notes upon the occurrence of a fundamental change at a repurchase price equal to 100% of the aggregate principal amount of the Convertible Notes to be repurchased, plus accrued and unpaid interest, if any, to, but excluding, the fundamental change repurchase date. In addition, upon conversion of the Convertible Notes, unless we elect to deliver solely shares of our common stock to settle such conversion (other than paying cash in lieu of delivering any fractional share), we will be required to make cash payments in respect of the Convertible Notes being converted. However, we may not have enough available cash or be able to obtain financing at the time we are required to make repurchases of the Convertible Notes surrendered therefor or Convertible Notes being converted. In addition, our ability to repurchase the Convertible Notes or to pay cash upon conversions of the Convertible Notes may be limited by law, by regulatory authority or by agreements governing our future indebtedness. Our failure to repurchase Convertible Notes at a time when the repurchase is required by the indenture governing the Convertible Notes or to pay any cash payable on future conversions of the Convertible Notes as required by the indenture governing the Convertible Notes would constitute a default under the indenture governing the Convertible Notes. A default under the indenture governing the Convertible Notes or the occurrence of the fundamental change itself may lead to a default under any future credit facility or other agreements governing our future indebtedness. If the repayment of the related indebtedness were to be accelerated after any applicable notice or grace periods, we may not have sufficient funds to repay the indebtedness and repurchase the Convertible Notes or make cash payments upon conversions thereof.

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The conditional conversion feature of the Convertible Notes, if triggered, may adversely affect our financial condition and operating results.

​

In the event the conditional conversion feature of the Convertible Notes is triggered, holders of the Convertible Notes will be entitled to convert the Convertible Notes at any time during specified periods at their option. If one or more holders elect to convert their Convertible Notes, unless we elect to satisfy our conversion obligation by delivering solely shares of our common stock (other than paying cash in lieu of delivering any fractional share), we would be required to settle a portion or all of our conversion obligation through the payment of cash, which could adversely affect our liquidity. In addition, even if holders of the Convertible Notes do not elect to convert their Convertible Notes, we could be required under applicable accounting rules to reclassify all or a portion of the outstanding principal of the Convertible Notes as a current rather than long-term liability, which would result in a material reduction of our net working capital.

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The capped call transactions may affect the value of our common stock.

​

In connection with the issuance of the Convertible Notes, we entered into capped call transactions with certain option counterparties. The capped call transactions cover, subject to customary adjustments, the number of shares of common stock initially underlying the Convertible Notes. The capped call transactions are expected generally to reduce the potential dilution of our common stock upon any conversion of the Convertible Notes or at our election (subject to certain conditions) and offset any cash payments we are required to make in excess of the aggregate principal amount of converted Convertible Notes, as the case may be, with such reduction or offset subject to a cap.

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We have been advised that, in connection with establishing their initial hedges of the capped call transactions, the option counterparties or their respective affiliates purchased shares of our common stock and/or entered into various derivative transactions with respect to our common stock concurrently with or shortly after the pricing of the Convertible Notes. In addition, the option counterparties or their respective affiliates may modify their hedge positions by entering into or unwinding various derivatives with respect to our common stock and/or purchasing or selling our common stock or other securities of ours in secondary market transactions prior to the maturity of the Convertible Notes (and are likely to do so on each exercise date of the capped call transactions, which are expected to occur during the 40 trading day period beginning on the 41st scheduled trading day prior to the maturity date of the Convertible Notes, or following any termination of any portion of the capped call transactions in connection with any repurchase, redemption or early conversion of the Convertible Notes). This activity could cause or avoid an increase or a decrease in the market price of our common stock.

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We are subject to counterparty risk with respect to the capped call transactions.

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The option counterparties to the capped call transactions are financial institutions, and we are subject to the risk that any or all of them might default under the capped call transactions. Our exposure to the credit risk of the option counterparties is not secured by any collateral. Past global economic conditions have resulted in the actual or perceived failure or financial difficulties of many financial institutions. If an option counterparty becomes subject to insolvency proceedings, we will become an unsecured creditor in those proceedings with a claim equal to our exposure at that time under the capped call transactions with such option counterparty. Our exposure will depend on many factors but, generally, an increase in our exposure will be correlated to an increase in the market price subject to the cap and in the volatility of our common stock.

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In addition, upon a default by an option counterparty, we may suffer more dilution than we currently anticipate with respect to our common stock. We can provide no assurances as to the financial stability or viability of the option counterparties.

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Risks Related to the Regulatory Environment

Our business, products and processes are subject to extensive regulation both in the U.S. and abroad and it can be costly to comply with these regulations. Any failure to adhere to applicable regulations could harm our business, financial condition and operating results.

Our medical devices, drugs, drug/device combination products and other products are subject to extensive government regulation in the U.S. by the FDA, state regulatory authorities and foreign regulatory authorities in the countries in which we conduct business. These regulations relate to, among other things, R&D, labeling, advertising, promotion, pricing, and discounts, recordkeeping, reporting, import and export, post-approval studies and the sale and distribution of our products. See Item 1, Business, “Government Regulation – U.S. Regulation & Reimbursement” and “International Regulation & Reimbursement” for additional information.

The process of obtaining clearances or approvals to market our products can be expensive and lengthy, and we cannot guarantee that our current products will receive approval for additional indications or that our future products will receive clearance or approval on a timely basis, if at all. Additionally, based upon a recent FDA determination, our pipeline products that are considered drug-device combination products will require review and coordination by each of

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FDA’s drug and device centers prior to approval, which may delay approval. Before we can obtain regulatory approval for any product candidate, we may be required to undertake extensive clinical testing in humans to demonstrate safety and efficacy to the satisfaction of the FDA and other regulatory agencies, including internationally. We have experienced in the past, and could experience in the future, delays in the commencement or completion of clinical trials or testing that could significantly affect our product development costs. We do not know whether planned clinical trials will begin on time, need to be redesigned, enroll an adequate number of patients in a timely manner or be completed on schedule, if at all. Conducting clinical trials is a complex and expensive process, can take many years, and outcomes are inherently uncertain. We incur substantial expense for, and devote significant time to, clinical trials but cannot be certain that the trials will ever result in commercial sales, even if we believe the results from such trials are positive. We may suffer significant setbacks in clinical trials, even after earlier clinical trials showed promising results, and failure can occur at any time during the clinical trial process. Any of our medical device products may malfunction and any of our products may produce undesirable adverse effects that could cause us or regulatory authorities to interrupt, delay or halt clinical trials. We, the clinical trial investigators, the independent review board responsible for overseeing the trial, the FDA, or another regulatory authority may suspend or terminate clinical trials at any time due to a number of factors, including failure to conduct the clinical trial in accordance with applicable regulatory requirements or trial protocols, failure to demonstrate a benefit from using the product, lack of sufficient funding, or to avoid exposing trial participants to unacceptable health risks. Any delay or failure in clinical trials would delay or prevent our ability to obtain necessary regulatory approvals, which would have a material adverse effect on our business, financial condition and prospects.

In some instances we or our partners have pursued, and may in the future pursue, a regulatory clearance or approval that has proven or proves unsuccessful, such as the delays experienced by the PreserFlo Microshunt and the change in regulatory pathway undertaken with respect to the iStent infinite, which in the past has, and in the future may, substantially increase the time and financial resources required to obtain FDA or other regulatory approval or could result in new competitive products reaching the market faster than our product candidate, which could materially adversely impact our competitive position and prospects. We cannot assure you that we will receive the requisite or timely approvals for commercialization of our product candidates.

Even after we have obtained the proper regulatory clearance or approval to market a product, we have ongoing responsibilities under FDA regulations and applicable foreign laws and regulations. We may also be required to seek additional regulatory approvals to modify our approved products or their manufacturing processes, which may entail significant time and expense. We and our suppliers are subject to extensive post-marketing regulatory requirements and failure to comply with applicable requirements could subject us to enforcement actions, including product approval withdrawals. Compliance with applicable regulatory requirements is subject to continual review and is monitored rigorously through periodic inspections by the FDA. Other post-market requirements that may regulate our products include establishment registration and device listing, quality system and good manufacturing requirements, reporting of adverse events and device malfunctions, reporting of corrections and removals (recalls), labeling requirements, and promotional restrictions. Under FDA regulations, combination products are subject to the quality system and good manufacturing requirements applicable to both drugs and medical devices. Our products could malfunction, cause unexpected adverse events, or experience performance problems that require review and possible corrective action by us or a component supplier, including a recall or market withdrawal. Failure to conduct any required post-marketing studies for our approved products in a timely manner could result in the revocation of the approval for the product that is subject to such a requirement and could also result in the recall or withdrawal of the product. Any recall or product withdrawal, whether required by the FDA or another regulatory authority or initiated by us, could harm our reputation with customers and negatively affect our sales.

The FDA, state and foreign regulatory authorities have broad enforcement powers. Our failure to comply with applicable regulatory requirements could result in enforcement action by the FDA, state or foreign regulatory authorities, which may include, among other things, warning letters, fines, injunctions, recalls, refusals to grant or delays in granting requests, civil fines and penalties, operating restrictions, withdrawal of approvals and even criminal prosecution.

In addition, our promotional materials, sales techniques, pricing programs and training methods must comply with FDA and other applicable laws and regulations, including the prohibition of the promotion of a drug or medical device for a use that has not been cleared or approved by the FDA, also known as an “off-label” use. The FDA or other regulatory authorities may limit the indications for use of our products, thereby restricting our ability to promote the drug or device. Physicians may use our products, particularly newly-approved products just being commercialized, off-label,

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as the FDA does not restrict or regulate a physician's choice of treatment within the practice of medicine. Moreover, surgeons may choose to use certain products or combinations of products in order to gain more favorable reimbursement treatment. However, if the FDA determines that our promotional materials, sales techniques, pricing programs or training constitutes promotion of an off-label use or encourages over-utilization of our products or use of our products in combinations that are not indicated or appropriate, it could request that we modify our materials, techniques, programs or training or subject us to regulatory or enforcement actions.

We are subject to healthcare fraud and abuse, anti-kickback, false claims and transparency laws and regulations, among others, which are enforced by federal and state governments with respect to our marketing, training, customer arrangements, discount, rebate and pricing programs, product bundling, financial arrangements with physicians, patient assistance programs, reimbursement support services, and other practices. See Item 1, Business, “Government Regulation – U.S. Regulation & Reimbursement” and “International Regulation & Reimbursement” for additional information about the laws and regulations which apply to us. The U.S. Department of Justice has increased its scrutiny of interactions between manufacturers and healthcare providers, as well as various patient and product support programs, which has led to a number of investigations, prosecutions, convictions and settlements in the healthcare industry. Although we try to structure our arrangements within available safe harbors whenever possible, we may nevertheless become subject to government scrutiny or investigation. Violations may result in civil monetary penalties, criminal penalties, and exclusion from participation in government healthcare programs, including Medicare and Medicaid, all of which would have an adverse effect on our business. In the foreign markets in which we operate, different pricing and reimbursement systems, which could result in lower reimbursement, could harm our ability to operate our business.

We are also subject to compliance with various laws and regulations, including the U.S. Foreign Corrupt Practices Act, the U.K. Bribery Act, and similar anti-bribery laws in other jurisdictions, which generally prohibit companies and their agents from making bribes or other improper payments to officials for the purpose of obtaining or retaining business. We are also subject to limitations on trade with persons in sanctioned countries. Our exposure to international markets increases the inherent risks of encountering such issues. While our employees, distributors and agents are required to comply with these laws and regulations, no assurance can be given that our training and internal policies and procedures will always protect us from violations of these laws. Any actual or alleged violations of these laws and regulations could subject us to government investigations, criminal sanctions, severe fines and penalties that could have a material adverse impact on our reputation, financial condition, results of operations and cash flows.

The scope and enforcement of each of the laws applicable to our business and products is uncertain and subject to rapid change in the current environment of healthcare reform. If our operations are found to be in violation of any of the government regulations that apply to us, we may be subject to penalties, including civil and criminal penalties, damages, fines, disgorgement, imprisonment, exclusion from participation in federal and state healthcare programs and the curtailment or restricting of our operations, any of which could harm our ability to operate our business and our financial results. Responding to a government investigation is time and resource intensive, and may cause harm to our business and reputation even if we are able to successfully defend against it. Additionally, resolution of any such investigation may require agreement to onerous corporate integrity agreements or other compliance or reporting requirements, which may negatively affect our business.

Legislative or regulatory reform of the healthcare system could hinder or prevent our products’ commercial success.

In the U.S. and in certain foreign jurisdictions, there have been a number of legislative and regulatory proposals to change the healthcare systems in ways that could impact our ability to sell our products profitably, if at all. In the U.S. in recent years, new legislation has been proposed and adopted at the federal and state levels that is effecting major changes in the healthcare system. In addition, new regulations and interpretations of existing healthcare statutes and regulations are frequently adopted and we may not be able to comply with the changed laws, they could increase the cost of manufacturing, marketing or selling our product, could make approvals of pipeline products more difficult or prevent us from selling at all. We expect there will continue to be a number of legislative and regulatory changes to the U.S. health care system that could significantly change the statutory provisions governing the regulatory approval, manufacture and marketing of regulated products or the reimbursement thereof and may impose additional costs or lengthen review times of planned or future products. It is also difficult to predict whether and how the policies and priorities of a new administration could materially impact the regulation governing our products.

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We may from time to time increase the prices of our products, as we have recently done with our Photrexa therapies. Drug pricing by pharmaceutical manufacturers is currently, and is expected to continue to be, under close scrutiny, including with respect to manufacturers that increase the price of products after acquiring those products from other companies. In some cases, such scrutiny has resulted in congressional inquiries and federal and state legislation designed to, among other things, bring more transparency to product pricing, review the relationship between pricing and manufacturers’ patient support programs, and reform government program reimbursement methodologies for products. Although our price increases have been based upon third party studies of the projected economic value of our products to the healthcare system, we cannot guarantee they would not be subject to such scrutiny.

In May 2017, the EU adopted Medical Devices Regulation 2017/745 (MDR), which repealed and replaced the Medical Device Directive (MDD). MDR went into effect in May 2021. Although MDR does not set out a substantially different regulatory system than MDD, it provides for stricter controls of medical devices. Under provisions that govern the transition from MDD to MDR, medical devices with notified body certificates issued under the MDD prior to May 2021 may continue to be marketed and sold as long as those certificates are valid (up to a maximum of five years from the date of issue) or until May 2024 at the latest. After the expiration of any applicable transitional period, only devices that have been CE marked under MDR may be placed on the market in the EU. Our failure to obtain CE marks for all of our products under MDR on a timely basis, or to comply with MDR, could restrict our ability to sell our products in the EU, which would have a material adverse effect on our business and financial results.

Broader legislative changes may also impact our operations. On January 31, 2020, the U.K. withdrew from the EU (commonly referred to as Brexit) and the transition period ended on December 31, 2020. The U.K. and EU reached agreement regarding their future relationship on December 24, 2020. As a result of Brexit, there may be greater restrictions on imports and exports into and out of the U.K. and EU countries and regulatory complexities that could adversely impact the Company.

If, as a result of legislative or regulatory healthcare reform, we cannot sell our products profitably, whether due to our own inability to comply with, or the inability of other economic operators in our supply chain to qualify under, any legislative reform, our business would be harmed. In addition, any change in the laws or regulations that govern the clearance and approval processes relating to our current and future products could make it more difficult and costly to obtain clearance or approval for new products, or to produce, market and distribute existing products.

Changes to the reimbursement rates for our products may adversely impact our business.

Our ability to successfully commercialize and achieve market acceptance of our products depends in significant part on adequate financial coverage and reimbursement from third party payors, including governmental payors (such as the Medicare and Medicaid programs in the U.S.), managed care organizations and private health insurers. See Item 1, Business, “Government Regulation – U.S. Regulation & Reimbursement” and “International Regulation & Reimbursement” for additional information. Payors continually review the clinical evidence for new technologies and can change their coverage policies without notice or deny payment if the product was not used in accordance with the payor’s coverage policy. Therefore, coverage for our products can differ significantly from payor to payor. In addition, payors continually review new technologies for possible coverage and can, without notice, deny coverage for these products and procedures. As a result, the coverage determination process is often time-consuming and costly and requires us to provide scientific and clinical support for the use of our products to each payor separately, with no assurance that coverage will be obtained or will be maintained once it is obtained.

In addition to uncertainties surrounding coverage policies, there are periodic changes to reimbursement levels. Without sufficient reimbursement from governmental programs or third party commercial payors, patients may not be able to access our products. The demand for, and the profitability of, our products could be materially harmed if the Medicaid program, Medicare program, other healthcare programs in the U.S. or elsewhere, or third party commercial payors in the U.S. or elsewhere deny reimbursement for our products, limit the indications for which our products will be reimbursed, or provide reimbursement only on unfavorable terms. Also, when procedures associated with our products transition from temporary CPT Category III codes to permanent CPT Category I codes, the physician and facility reimbursement levels associated with the procedures using these products could be decreased, such as the decreased payment rates for procedures using our iStent-related products, in conjunction with cataract surgery,

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established by CMS for 2022, as discussed earlier in these Risk Factors under the heading “Risks Related to Our Business.” Even when a permanent billing code has been assigned to a product, there is no guarantee that coverage will be provided. MACs have in the past, and may in the future, change coverage terms, which could result in inadequate reimbursement and impact the use of our products. If we are unable to maintain our existing codes or obtain new permanent codes for procedures using our products, or obtain new reimbursement codes for our other products in development, we may be subject to significant pricing pressure, which could harm our business, results of operations, financial condition and prospects.

We cannot predict to what extent the continuing effects of the COVID-19 pandemic may disrupt global healthcare systems and access to our products or result in a widespread loss of individual health insurance coverage due to unemployment, a shift from commercial payor coverage to government payor coverage, or an increase in demand for patient assistance and/or free drug programs, any of which could adversely affect our net revenue. In addition, payers consistently engage in cost containment efforts, which could include efforts to decrease reimbursement levels for prescription drugs and the imposition of prior authorization for the use of our products. We cannot predict actions that third party payors may take, or whether they will limit the access to and level of reimbursement for our products or refuse to provide any approvals or coverage.

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Risks Related to Our Intellectual Property

If we are unable to adequately protect our intellectual property, our competitors and other third parties could develop and commercialize products similar or identical to ours, which would substantially impair our ability to compete.

Our success and ability to compete depends significantly upon our ability to obtain, maintain and protect our proprietary rights and licensed intellectual property rights to the technologies and inventions used in or embodied by our products. We rely on a combination of patents and trademark rights, and to a lesser extent on trade secrets and copyrights, together with licenses and nondisclosure agreements to protect our technologies. These legal means, however, afford only limited protection and may not adequately protect our business. We also have not pursued or maintained, and may not pursue or maintain in the future, patent protection for our products in every country or territory in which we sell or will in the future sell our products. In addition, we cannot be sure that any of our pending patent applications or pending trademark applications will issue or that, if issued, they will issue in a form that will be advantageous to us.

Despite our efforts to protect our proprietary rights, we cannot guarantee that we will be able to adequately protect these rights, which could substantially impair our ability to compete. Our patents may be challenged and held invalid or we may be unable to extend the protection on products with expiring patents. Moreover, our competitors may independently develop equivalent knowledge, methods and know-how. Competitors could purchase our products and attempt to replicate some or all of the competitive advantages we derive from our development efforts, infringe our intellectual property rights, design around our protected technology or develop their own competitive technologies that fall outside of our intellectual property rights. Further, although it is our policy to require each of our employees, consultants and any other parties who may be involved in the development of intellectual property on our behalf to execute proprietary information and inventions agreements, we may be unsuccessful in doing so with each party who in fact develops intellectual property that we regard as our own. The relevant assignment provisions may not be self-executing or may be breached, resulting in ownership disputes and/or litigation.

We have several foreign patents and patent applications, and expect to pursue patent protection in the most significant markets in which we do business. The laws of other countries in which our products are or may be sold may not protect our product offerings and intellectual property to the same extent as U.S. laws, if at all. Many companies have encountered significant difficulties in obtaining, protecting and defending such rights in international markets. In addition, many countries limit the enforceability of patents against other parties, including government agencies or government contractors. In these countries, the patent owner may have limited remedies, and certain countries have compulsory licensing laws under which a patent owner may be compelled to grant licenses to other parties. We also may be unable to protect our rights in trade secrets and unpatented proprietary technology in these countries. If we encounter such difficulties or are otherwise precluded from effectively protecting our intellectual property rights in these countries, our business, financial condition and results of operations could be substantially harmed.

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We may not be able to accurately estimate or control our future operating expenses in relation to obtaining, enforcing and/or defending intellectual property, which could lead to cash shortfalls. Our operating expenses may fluctuate significantly in the future as a result of the costs of preparing, filing, prosecuting, defending and enforcing patent claims and other patent related costs, including litigation costs and the results of such litigation or costs associated with administrative proceedings and the results of such proceedings.

We have been and may in the future become involved in patent and other intellectual property litigation or administrative proceedings relating to our intellectual property rights, which could be costly, time consuming and unsuccessful and could interfere with our ability to successfully commercialize our products.

Intellectual property rights are essential to our business. We have asserted and may in the future need to assert claims of infringement against third parties to protect our rights, or to invalidate or challenge the intellectual property rights of a third party, including those rights owned by our competitors. Additionally, third parties could assert infringement or misappropriation claims against us with respect to our current or future commercial products and seek to invalidate one or more of our patents or trademarks. Intellectual property disputes often involve complex legal and factual questions, and could result in significant costs, substantial damages and our inability to manufacture, market or sell our existing or future products that are found to infringe. Even if we were to prevail in any such action, the litigation or administrative proceeding could result in substantial cost and diversion of resources that could materially and adversely affect our business. Such claims could arise in situations where certain employees, consultants or contractors were previous, or are currently, employed by other medical device, biotechnology or pharmaceutical companies, including our competitors or potential competitors. Although we try to ensure that our employees and consultants do not use the intellectual property, proprietary information, know-how or trade secrets of others in their work for us, we may be subject to claims that we or these individuals have, inadvertently or otherwise, misappropriated the intellectual property or disclosed the alleged trade secrets or other proprietary information, of these former employers.

There is no guarantee that we would be successful enforcing or defending our intellectual property rights in court. A court could hold that some or all of our asserted intellectual property rights are not infringed, or could invalidate our rights, hold our rights unenforceable, or substantially narrow the scope of protection. Further, we could be prohibited from selling our products or a court could order us to pay compensatory damages as well as other penalties and fines. Any such adverse result would undermine our competitive position. Regardless of the final outcome, any litigation to enforce our intellectual property rights in patents, copyrights, trade secrets or trademarks is highly unpredictable and could result in substantial costs and diversion of resources, which could have a material adverse effect on our business, financial condition and results of operations.

Risks Related to Being a Public Company and Our Common Stock

Anti-takeover provisions in our charter documents and under Delaware law could make an acquisition of us, which may be beneficial to our stockholders, more difficult and may prevent attempts by our stockholders to replace or remove our current management and limit the market price of our common stock.

Provisions in our Restated Certificate of Incorporation (Glaukos Charter) and amended and restated bylaws (Bylaws) may have the effect of delaying or preventing a change of control or changes in our management. Our restated certificate of incorporation and amended and restated bylaws include provisions that:

| ● | authorize our board of directors to issue, without further action by the stockholders, up to 5,000,000 shares of undesignated preferred stock;

| ● | require that any action to be taken by our stockholders be affected at a duly called annual or special meeting and not by written consent;

| ● | specify that special meetings of our stockholders may be called only by our board of directors, the chairman of the board of directors, the chief executive officer or the president;

| ● | establish an advance notice procedure for stockholder approvals to be brought before an annual meeting of our stockholders, including proposed nominations of persons for election to our board of directors;

| ● | divide our board of directors into three classes, with each class serving staggered three year terms;

| ● | provide that our directors may be removed only for cause by a supermajority vote of our stockholders;

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| ● | provide that vacancies on our board of directors may be filled only by a majority of directors then in office, even though less than a quorum;

| ● | specify that no stockholder is permitted to cumulate votes at any election of directors; and

| ● | require a supermajority vote of the stockholders and a majority vote of the board to amend certain of the above-mentioned provisions and our bylaws.

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These provisions may frustrate or prevent any attempts by our stockholders to replace or remove our current management by making it more difficult to replace members of our board of directors, which is responsible for appointing the members of our management. In addition, because we are incorporated in Delaware, we are governed by the provisions of Section 203 of the Delaware General Corporation Law, which limits the ability of stockholders owning in excess of 15% of our outstanding voting stock to merge or combine with us.

The exclusive forum provisions in our organizational documents could limit our stockholders' ability to bring a claim in a judicial forum that it finds favorable for disputes with the Company or its directors, officers or other employees.

Our Glaukos Charter and Bylaws provide that, unless the Company consents in writing to the selection of an alternative forum, the Court of Chancery of the State of Delaware is the sole and exclusive forum for (i) any derivative action or proceeding brought on behalf of the Company, (ii) any action or proceeding asserting a claim of breach of a fiduciary duty owed by any director, officer or other employee of the Company or its stockholders, (iii) any action or proceeding asserting a claim arising pursuant to any provision of the Delaware General Corporation Law, the Glaukos Charter or our Bylaws, or (iv) any action or proceeding asserting a claim governed by the internal affairs doctrine (the Delaware Exclusive Forum Provision). Further, our Bylaws provide that the federal district courts of the United States of America will, to the fullest extent permitted by law, be the exclusive forum for resolving any complaint asserting a cause of action under the Securities Act (the Federal Forum Provision). Our decision to adopt the Federal Forum Provision followed a decision by the Supreme Court of the State of Delaware holding that such provisions are facially valid under Delaware law and means that suits brought by stockholders to enforce any duty or liability created under the Securities Act must be brought in federal court and cannot be brought in state court.

The Delaware Exclusive Forum Provision is intended to apply to claims arising under Delaware state law and would not apply to claims brought pursuant to the Exchange Act or the Securities Act, or any other claim for which the federal courts have exclusive jurisdiction. In addition, the Federal Forum Provision is intended to apply to claims arising under the Securities Act and would not apply to claims brought pursuant to the Exchange Act. The exclusive forum provisions in the Glaukos Charter and our Bylaws will not relieve us of our duties to comply with the federal securities laws and the rules and regulations thereunder and, accordingly, actions by our stockholders to enforce any duty or liability created by the Exchange Act or the rules and regulations thereunder must be brought in federal courts. Our stockholders will not be deemed to have waived our compliance with these laws, rules and regulations.

The exclusive forum provisions in the Glaukos Charter and our Bylaws may limit a stockholder's ability to bring a claim in a judicial forum of its choosing for disputes with the Company or its directors, officers or other employees, which may discourage such lawsuits. In addition, stockholders who do bring a claim in the Court of Chancery of the State of Delaware pursuant to the Delaware Exclusive Forum Provision could face additional litigation costs in pursuing any such claim, particularly if they do not reside in or near Delaware. The court in the designated forum under our exclusive forum provisions may also reach different judgments or results than would other courts, including courts where a stockholder would otherwise choose to bring the action, and such judgments or results may be more favorable to the Company than to our stockholders. Further, the enforceability of similar exclusive forum provisions in other companies’ organizational documents has been challenged in legal proceedings, and it is possible that a court could find any of our exclusive forum provisions to be inapplicable to, or unenforceable in respect of, one or more of the specified types of actions or proceedings. If a court were to find all or any part of our exclusive forum provisions to be inapplicable or unenforceable in an action, we might incur additional costs associated with resolving such action in other jurisdictions.

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ITEM 1B. UNRESOLVED STAFF COMMENTS

None.

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ITEM 2. PROPERTIES

The Company leases two adjacent facilities located in San Clemente, California. Each of these leases expires on May 31, 2030, and each contains an option to extend the lease for one additional five year period at market rates. The total leased square footage of both facilities equals approximately 98,000. Additionally, the Company leases one property containing three office buildings, comprising approximately 160,000 rentable square feet of space, located in Aliso Viejo, California which was accounted for as a finance lease. The term of the Aliso Facility commenced on May 1, 2019 and continues for thirteen years. The agreement contains an option to extend the lease for two additional five year periods at market rates. On December 18, 2018, we also purchased approximately 2.5 acres of vacant land located adjacent to the Aliso Facility for future expansion purposes. In January 2022, the Company began relocating certain of its corporate administrative headquarters, along with certain laboratory, R&D and warehouse space, to the Aliso Facility. The Company’s San Clemente locations will continue to serve as its main manufacturing locations for the foreseeable future.

Additionally, we lease approximately 27,000 square feet of office and laboratory space in Waltham, Massachusetts, pursuant to a lease agreement that expires in 2023. We also currently occupy approximately 60,000 square feet of leased manufacturing space in Burlington, Massachusetts pursuant to a lease agreement that expires on July 31, 2033. Our additional U.S.-based and foreign subsidiaries’ leased office space, which includes small administrative offices in Germany, Australia, Canada, Brazil, Ireland, Japan and the United Kingdom, totals less than 14,000 square feet.

We believe our existing properties are well maintained, in good operating condition and are adequate to support our present level of operations.

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ITEM 3. LEGAL PROCEEDINGS

Neither we nor any of our subsidiaries is a party to, and none of their respective property is the subject of, any material legal proceeding, although we are from time to time party to legal proceedings that arise in the ordinary course of business.

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ITEM 4. MINE SAFETY DISCLOSURES

Not applicable.

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PART II

ITEM 5. MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES

Market Information for Common Stock

Our common stock trades on the New York Stock Exchange (NYSE) under the symbol “GKOS”.

As of February 24, 2022, we had 62 holders of record of our common stock. The actual number of stockholders is greater than this number of record holders, and includes stockholders who are beneficial owners but whose shares are held in street name by brokers and other nominees. The number of record holders also does not include stockholders whose shares may be held in trust by other entities.

Stock Performance Graph

The following performance graph shows the cumulative total stockholder return during the last five years in (i) our common stock, (ii) the S&P Small Cap 600 index and (iii) the S&P Small Cap 600 Healthcare index. The graph assumes that $100 was invested at the closing price of our common stock on the last trading day of fiscal year 2016 and all dividends were reinvested. Stockholder returns over the indicated period should not be considered indicative of future stockholder returns.

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​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 12/31/2016 |  | 12/29/2017 |  | 12/31/2018 |  | 12/31/2019 |  | 12/31/2020 |  | 12/31/2021
Glaukos Corporation | ​ | $ | 100.00 | ​ | $ | 74.78 | ​ | $ | 163.76 | ​ | $ | 158.80 | ​ | $ | 219.42 | ​ | $ | 129.56
S&P Small Cap 600 index | ​ | $ | 100.00 | ​ | $ | 111.73 | ​ | $ | 100.83 | ​ | $ | 121.86 | ​ | $ | 133.53 | ​ | $ | 167.28
S&P Small Cap 600 Healthcare index | ​ | $ | 100.00 | ​ | $ | 134.48 | ​ | $ | 147.62 | ​ | $ | 177.34 | ​ | $ | 233.05 | ​ | $ | 246.48

This performance graph shall not be deemed “filed” for purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities under that section and shall not be deemed to be incorporated by reference into any of our filings under the Securities Act or the Exchange Act.

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Dividend Policy

We have never declared or paid any cash dividends on our common stock or any other securities. We anticipate that we will retain all available funds and any future earnings, if any, for use in the operation of our business and do not anticipate paying cash dividends in the foreseeable future.

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ITEM 6.[RESERVED]

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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 “Selected Financial Data” and our audited consolidated financial statements and related notes included in Items 6 and 8, respectively, of this Annual Report on Form 10-K. This discussion and analysis and other parts of this Annual Report on Form 10-K contain forward-looking statements that reflect our current plans, expectations, estimates and beliefs that involve risks, uncertainties and assumptions, such as statements regarding our plans, objectives, expectations, intentions and projections. Our actual results and the timing of selected events may differ materially from those discussed in these forward-looking statements. You should carefully read Item 1A - “Risk Factors” included in this Annual Report on Form 10-K to gain an understanding of the important factors that could cause actual results to differ materially from our forward-looking statements. Please also see the section entitled “Special Note Regarding Forward-Looking Statements and Industry Data.”

Overview

We are an ophthalmic medical technology and pharmaceutical company focused on developing novel therapies for the treatment of glaucoma, corneal disorders, and retinal disease. We first developed Micro-Invasive Glaucoma Surgery (MIGS) as an alternative to the traditional glaucoma treatment paradigm, launching our first MIGS device commercially in 2012, and have since developed a portfolio of technologically distinct and leverageable platforms to support ongoing pharmaceutical and medical device innovations. Products or product candidates for each of these platforms are designed to advance the standard of care through better treatment options across the areas of glaucoma, corneal disorders such as keratoconus, dry eye and refractive vision correction, and retinal diseases such as neovascular age-related macular degeneration (AMD), diabetic macular edema (DME), and retinal vein occlusion (RVO).

Impact of COVID-19 Pandemic and Current Economic Environment

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While the COVID-19 pandemic and subsequent economic slowdown materially impacted the global demand for our products starting in March 2020, we began to see an early recovery toward more normalized levels for cataract and keratoconus procedures as early as May 2020, a trend that has generally continued, with periodic volatility in certain geographies in which we operate, through December 31, 2021. Most recently the Omicron variant has led to a material increase in diagnosed cases worldwide, creating new government restrictions in select geographies and impacting elective procedures in hospital and ambulatory surgery center sites. Additionally, the COVID-19 pandemic has led to widespread staffing shortages, including in ambulatory surgery centers, which may also impact elective procedures. These trends accelerated at the end of December 2021 and continued through the date herein.

​

We continue to actively assess the impact of COVID-19 on our clinical trials and other pipeline products. The closure of ophthalmic practices and deferral of elective procedures beginning in the first quarter of 2020 in response to COVID-19 disrupted new patient enrollment in our ongoing clinical trials. While we cannot predict the full impact of COVID-19 on the timing of completion of our clinical trials and the expected regulatory approvals for our pipeline products, our disclosed targeted approval dates anticipate, to our best estimate, such impact.

Additionally, some of our vendors are continuing to experience supply challenges, both in the acquisition of raw materials as well as due to limited headcount resources, and we have experienced higher costs for certain raw materials. These challenges have led to delays and partial or unfulfilled deliveries of certain components needed for the manufacture of our products, in some cases requiring us to find second sources for materials. If these delays and partial or unfulfilled deliveries persist, they could impact our ability to ship some of our products to our customers, or bring some of our pipeline products to market, in a timely manner. We believe that much of these supply challenges stem from the ongoing obstacles presented by COVID-19.

In 2020, when COVID had its greatest financial impact to date, we sought to preserve our cash position by instituting a number of cost saving initiatives, including temporary reductions in discretionary spending and capital expenditures. We temporarily deferred a significant portion of our planned 2020 capital expenditures, particularly those related to facilities expansion and consolidation plans, which were reinstituted as state and local governments began to

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authorize re-openings. Further, in June 2020, we issued an aggregate principal amount of $287.5 million of 2.75% convertible notes due 2027 (the Convertible Notes), the net proceeds of which will be used for working capital and general corporate purposes. As of December 31, 2021, we had cash, cash equivalents, short-term investments, and restricted cash of approximately $423.5 million, compared to $413.9 million as of December 31, 2020.

The ultimate impact of the COVID-19 pandemic on our operations going forward is unknown and will depend on future developments which are highly uncertain and cannot be predicted with confidence, including the duration and severity of the COVID-19 outbreak, the status of health and safety actions taken to contain its spread, the severity and transmission rates of new variants of COVID-19 such as the Delta and Omicron variants, the availability, distribution, and efficacy of vaccines for COVID-19, any additional preventative and protective actions that governments, or we, may take, any future surges of COVID-19 that may occur, the dynamics associated with the rollout of the COVID-19 vaccines, and how quickly and to what extent economic and operating conditions normalize within the markets in which we operate. For additional information, see the section titled Risks Related to Our Business within Item 1A. Risk Factors of this Annual Report on Form 10-K.

Financial Overview

The most important financial indicators that we use to assess our business are net sales, gross margin, operating expenses, and cash on hand.

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​ | December 31, | ​
​ |  | 2021 |  | 2020 | ​
Net sales | ​ | $ | 294,011 | ​ | $ | 224,959 | ​
Gross margin | ​ | ​ | 77 | % | ​ | 59 | %
Operating expenses | ​ | $ | 260,256 | ​ | $ | 256,793 | ​
Cash, cash equivalents, short-term investments and restricted cash | ​ | $ | 423,467 | ​ | $ | 413,934 | ​

​

Please see Results of Operations and Liquidity and Capital Resources below for a detailed discussion of each of the above items including analysis of the fluctuations from year to year.

We incurred net losses of $49.6 million and $120.3 million for the years ended December 31, 2021 and December 31, 2020, respectively and as of December 31, 2021, we had an accumulated deficit of $365.2 million.

Material Changes and Transactions

Acquisition of Avedro, Inc.

On November 21, 2019, we acquired Avedro, Inc. (Avedro), a hybrid ophthalmic pharmaceutical and medical technology company focused on developing therapies designed to treat corneal diseases and disorders and correct refractive conditions, in a stock-for-stock transaction (Avedro Merger). Avedro developed novel bio-activated drug formulations used in combination with proprietary systems for the treatment of progressive keratoconus and corneal ectasia following refractive surgery. The therapy is the first and only minimally invasive anterior segment product offering approved by the FDA shown to halt the progression of keratoconus.

Recent Developments

2022 U.S. reimbursement rates

On November 2, 2021, the United States (U.S.) Centers for Medicare & Medicaid Services (CMS) published its final rules for 2022 Medicare physician fee payment rates and 2022 Medicare facility fee payment rates for services furnished in both the ambulatory surgery center and hospital outpatient settings (Final Rules). These Final Rules superseded the proposed rates that were issued by CMS in July 2021 which were much lower than the rates issued in the Final Rules. Compared to the 2021 reimbursement rates, the Final Rules contained a new, significantly lower physician fee related to the implantation of trabecular bypass stents, such as our iStent family of products, in conjunction with cataract surgery. Conversely, the facility fee schedule related to surgeries that include implantation of trabecular bypass

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stents, such as our iStent family of products, in conjunction with cataract surgery, slightly decreases reimbursements to an ambulatory surgery center and increases reimbursements to a hospital. We estimate that approximately 80% of procedures utilizing our trabecular micro-bypass technologies in the U.S. are performed in the ambulatory surgery center setting and the remaining estimated 20% of procedures are performed in the hospital. Additionally, the Final Rules established facility fee payment rates that were lower than anticipated for standalone insertion of an aqueous drainage device in the ambulatory surgery center and hospital settings, which would be the procedure that such facilities would use with our iStent infinite product, which is not yet approved by the FDA. These CMS reimbursement rates contained in the Final Rules took effect January 1, 2022.

​

U.S. glaucoma volumes were negatively impacted during the third and fourth quarter of 2021 as typical customer ordering patterns were disrupted and trialing of competitive products increased in anticipation of the potential 2022 CMS physician and facility fee reimbursement rate decreases becoming effective as originally proposed in July 2021. The physician fee reimbursement rate as issued in the Final Rules may continue to have an adverse impact on 2022 procedural iStent family product volumes, in conjunction with cataract surgery, as well as on our 2022 U.S. combo-cataract glaucoma revenues, gross profit, and net income, the full extent of which is not known at this time.

​

Attillaps License Agreement

On September 20, 2021, we announced that we had entered into a licensing agreement (Attillaps License Agreement) with Attillaps Holdings, Inc. (Attillaps) under which Attillaps granted us a global exclusive license to Attillaps’ proprietary library of investigational pharmaceutical compounds that target the eradication of Demodex mites, which are the root cause of Demodex blepharitis and often associated with meibomian gland dysfunction and related ophthalmic diseases. Under the Attillaps Licensing Agreement, we have the exclusive global right to research, develop, manufacture and commercialize products using certain acetylcholinesterase inhibitors for the treatment of ophthalmic diseases caused by Demodex mites. We paid $5.0 million upon the signing of the Attillaps License Agreement and will have ongoing milestone and royalty payment obligations depending on the success of the development, approval and commercialization of the compounds.

Settlement of Patent Litigation

On September 14, 2021, we entered into a settlement agreement (Settlement Agreement) with Ivantis, Inc. (Ivantis), pursuant to which we and Ivantis agreed to terminate the patent infringement lawsuit we had filed against Ivantis on April 14, 2018 in the U.S. District Court for the Central District of California, Southern Division (the Lawsuit). In the Lawsuit, we alleged that Ivantis’ Hydrus® Microstent device infringes our U.S. Patent Nos. 6,626,858 and 9,827,143. Pursuant to the terms of the Settlement Agreement, Ivantis has made cash payments totaling $60.0 million, $30.0 million of which was paid to us during the year ended December 31, 2021, and $30.0 million of which was paid to us in January 2022.

Additionally, Ivantis will make quarterly royalty payments to us in the amount of 10% of Ivantis’ Hydrus Microstent U.S. sales and any international sales supplied out of the U.S. beginning in the fourth quarter of 2021 through April 26, 2025, subject to a per-unit minimum payment. We and Ivantis have dismissed with prejudice all of our claims against each other in the Lawsuit, which was scheduled for trial beginning on or around September 28, 2021, and in related lawsuits in other forums and jurisdictions. The parties also have agreed to mutual licenses and covenants not to sue the other party for patent infringement relating to Ivantis’ Hydrus Microstent or our micro-stent devices.

Santen License Agreement

On May 18, 2021, we announced that we entered into a new development and commercialization license agreement with Santen Pharmaceutical Co., Ltd. (Santen) for the PreserFlo MicroShunt, superseding the previous collaboration and distribution agreements between the two parties. Under the new agreement, we obtain exclusive commercialization rights for the MicroShunt in the United States, Australia, New Zealand, Canada, Brazil, Mexico and the remainder of Latin America. The new agreement also provides us with control over development activities for the MicroShunt in these same territories, including clinical development and regulatory affairs activities in the United States following a transition period. Santen submitted a premarket approval (PMA) application to the U.S. Food and Drug Administration (FDA) in June 2020 and discussions with the FDA remain ongoing. We did not make any payment in connection with the execution of the license agreement; however, should we be successful in obtaining regulatory

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approval for the PreserFlo MicroShunt, we would be required to pay Santen a milestone payment, followed by royalties and other potential future milestones depending on the success of the commercialization of the product.

Intratus License Amendment

On April 14, 2021, we announced that we had entered into an amended licensing agreement with Intratus, Inc. (Intratus) under which Intratus granted us a global exclusive license to research, develop, manufacture and commercialize Intratus’ patented, non-invasive drug delivery platform for application in the treatment of presbyopia. The addition of presbyopia expands upon the existing agreement between us and Intratus announced on July 22, 2019. The amendment includes a mechanism to further expand the existing agreement to other indications, applying the active pharmaceutical ingredients being advanced by us in glaucoma, corneal disorders and presbyopia to new ophthalmic fields.

Factors Affecting Our Performance

In addition to the disruption resulting from COVID-19 as discussed above, the full effects of which are difficult to predict at this time, our operations to date have been, and we believe our future growth will be, impacted by the following:

| ● | the rate at which we expand our global sales and marketing infrastructure, and the speed at which we can continue increasing awareness of our products to patients and physicians;

| ● | timely approval of new products by regulatory authorities and approved indications for use;

| ● | our industry is highly competitive and subject to rapid and profound technological, market and product-related changes. Our success depends, in part, upon our ability to maintain a competitive position in the development of new products for the treatment of chronic eye diseases;

| ● | publications of clinical results by us, our competitors and other third parties can have a significant influence on whether, and the degree to which, our products are used by physicians and the procedures and treatments those physicians choose to administer to their patients;

| ● | the physicians who use our products may not perform procedures during certain times of the year, due to seasonality patterns typical for certain of our procedures, or when they are away from their practices for various reasons;

| ● | the coverage and reimbursement rates set by CMS and third-party payors for the procedures using our products;

| ● | our ability to realize commercialized products from the licensing and distribution arrangements and other partnerships into which we have entered and will in the future enter; and

| ● | the impact of fluctuations in foreign currency exchange rates, as most of our sales internationally are denominated in the local currency of the country in which we sell our products.

​

Further, we have made and expect to continue to make significant investments in our global sales force, marketing programs, research and development (R&D) activities, clinical studies, and general and administrative infrastructure. FDA-approved investigational device exemption (IDE) or investigational new drug (IND) studies and new product development programs in our industry are expensive. Our operating expenses have increased significantly following our acquisition of Avedro, and we also have incurred additional construction costs related to our new facility in Aliso Viejo, California (Aliso Facility).

We expect 2022 revenues and near-term performance to reflect increasing competitive dynamics, the impact of the reduced physician fee reimbursement rates contained in the CMS Final Rules and the continuing disruption resulting from COVID-19, the full effects of which are difficult to predict at this time.

Although we have been profitable for certain periods in our operating history, there can be no assurance that we will be profitable or generate cash from operations in the future.

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Components of Results of Operations

Net Sales

We currently operate in one reportable segment and net sales are generated primarily from sales of iStent products and sales of Photrexa and other associated drug formulations, as well as our proprietary bioactivation systems, to customers and royalty income. Revenue is recognized when control of the promised goods or services is transferred to the customer in an amount that reflects the consideration to which we expect to be entitled in exchange for those products or services.

We sell the majority of our products through a direct sales organization in the United States. Internationally, we sell our products primarily through direct sales subsidiaries in seventeen countries and through independent distributors in certain countries in which we do not have a direct presence or maintain a modest commercial presence. The primary end-user customers for our products are surgery centers, hospitals and physician private practices.

While net sales may increase as we expand our global sales and marketing infrastructure and continue to increase awareness of our products by expanding our sales base and increasing our marketing efforts, historically our net sales within a fiscal year have been impacted seasonally, as demand for U.S. ophthalmic procedures is typically softer in the first quarter and stronger in the fourth quarter of a given year. However, we have not experienced the same seasonality pattern in 2021 due in part to the COVID-19 pandemic and its effect on our commercial performance may continue into future reporting periods. We also believe the 2022 CMS physician fee and facility fee rate decreases, which were finalized in the fourth quarter 2021, have disrupted traditional customer ordering patterns and have resulted in our customers’ trialing of competitive products, causing reduced U.S. Glaucoma sales volumes during our third and fourth quarter of 2021. Additionally, for several years we had commercialized our products in the U.S. with few or no direct competitors. Other products have now become available in the U.S. and globally, or are in development by third parties, that have entered or could enter the market and which may affect adoption of or demand for our products. These other products could achieve greater commercial acceptance or demonstrate better safety or effectiveness, clinical results, ease of use or lower costs than our products, which could adversely impact our net sales.

Cost of Sales

Cost of sales reflects the aggregate costs to manufacture our products and includes raw material costs, labor costs, manufacturing overhead expenses and the effect of changes in the balance of reserves for excess and obsolete inventory.

We manufacture our iStent products at our current headquarters in San Clemente, California using components manufactured by third parties. We manufacture our KXL systems at our manufacturing facilities in Burlington, Massachusetts, and we contract with third-party manufacturers in the U.S. and Germany to produce our Photrexa and other associated drug formulations.

Due to the relatively low production volumes of our iStent products and our KXL systems compared to our potential capacity for those products, a significant portion of our per unit costs is comprised of manufacturing overhead expenses. These expenses include quality assurance, material procurement, inventory control, facilities, equipment and operations supervision and management.

Cost of sales includes a charge equal to a low single-digit percentage of worldwide net sales of certain current and future products, including our iStent products, with a required minimum annual payment of $0.5 million, which amount became payable to the Regents of the University of California (the University) in connection with our December 2014 agreement with the University (the UC Agreement) related to a group of our U.S. patents (the Patent Rights). This ongoing product payment obligation will change as patent coverage on certain products being to lapse, and will terminate entirely on the date the last of the Patent Rights expires, which is currently expected to be in the fourth quarter of 2022.

Cost of sales has included amortization of the $252.2 million developed technology intangible asset recognized in connection with the Avedro Merger. For each of the years ended December 31, 2021 and December 31, 2020, the amortization expense was $22.1 million, and for the year ended December 31, 2019, the amortization expense was $2.3

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million. Additionally, cost of sales included amortization of the fair market value inventory adjustment recorded in connection with the Avedro Merger, which for the years ended December 31, 2020 and December 31, 2019 was $24.7 million and $4.0 million, respectively, and was fully amortized as of December 31, 2020.

Our future gross profit as a percentage of net sales, or gross margin, will be impacted by numerous factors including commencement of sales of products in our pipeline, or any other future products, which may have higher product costs. Our gross margin will also be affected by manufacturing or supply chain inefficiencies that we may experience as we attempt to manufacture our products on a larger scale, manufacture new products and change our manufacturing capacity or output. Additionally, our gross margin will continue to be affected by royalty expenses on current or future products associated with various licensing agreements. Other factors adversely affecting our net sales in future periods, including the impact of the COVID-19 pandemic and any related supply chain issues, and the impact of reductions by CMS in 2022 Medicare payment rates for certain of our products and related services, may also impact our gross profit margins in future periods.

Selling, General and Administrative

Our selling, general and administrative (SG&A) expenses primarily consist of personnel-related expenses, including salaries, sales commissions, bonuses, fringe benefits and stock-based compensation for our executive, financial, marketing, sales, and administrative functions. Other significant SG&A expenses include marketing programs; advertising; post-approval clinical studies; conferences and congresses; travel expenses; costs associated with obtaining and maintaining our patent portfolio; professional fees for accounting, auditing, consulting and legal services; costs to implement our global enterprise systems; and allocated overhead expenses.

We expect SG&A expenses to continue to grow as we increase our global sales and marketing infrastructure and general administration infrastructure in the United States. We also expect other nonemployee-related costs, including sales and marketing program activities for new products, outside services and accounting and general legal costs to increase as our overall operations grow. The timing of these increased expenditures and their magnitude are primarily dependent on the commercial success and sales growth of our products, as well as on the timing of any new product launches and other potential business and operational activities.

Research and Development

Our R&D activities primarily consist of new product development projects, pre-clinical studies, IDE and IND studies, and other clinical trials. Our R&D expenses primarily consist of personnel-related expenses, including salaries, fringe benefits and stock-based compensation for our R&D employees; research materials; supplies and services; and the costs of conducting clinical studies, which include payments to investigational sites and investigators, clinical research organizations, consultants, and other outside technical services and the costs of materials, supplies and travel. We expense R&D costs as incurred. We expect our R&D expenses to continue to increase as we initiate and advance our development programs, including our expanding surgical, pharmaceutical and intraocular sensor development efforts and clinical trials across glaucoma, retinal disease and corneal health.

Completion dates and costs for our clinical development programs include seeking regulatory approvals and our research programs vary significantly for each current and future product candidate and are difficult to predict. As a result, while we expect our R&D costs to continue to increase for the foreseeable future, we cannot estimate with any degree of certainty the costs we will incur in connection with the development of our product candidates. We anticipate we will make determinations as to which programs and product candidates to pursue and how much funding to direct to each program and product candidate on an ongoing basis in response to the scientific success of early research programs, results of ongoing and future clinical trials, as well as ongoing assessments as to each current or future product candidate’s commercial potential and our likelihood of obtaining necessary regulatory approvals. We are not currently able to fully track expenses by product candidate.

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In-process Research and Development

Our in-process research and development (IPR&D) expenses relate to the amendment of our exclusive licensing agreement with Intratus, Inc. and our Attillaps License Agreement. Upfront payments of $5.0 million were made in connection with each of these agreements and were expensed to IPR&D as management determined there were no alternative future uses for the technology acquired.

Litigation-related Settlement

Pursuant to the terms of the Settlement Agreement, Ivantis paid us $30.0 million during the year ended December 31, 2021. The $30.0 million cash payment received during the year ended December 31, 2021 is included in litigation-related settlement as a reduction of operating expenses on the consolidated statements of operations.

Non-Operating (Expense) Income, Net

Non-operating (expense) income, net primarily consists of interest expense associated with our finance lease for our Aliso Facility and for our Convertible Notes, interest income derived from our short-term investments and unrealized gains and losses arising from exchange rate fluctuations on transactions denominated in a currency other than the U.S. dollar, primarily related to intercompany loans.

Income Taxes

Our tax provision is primarily comprised of state and foreign income taxes. Our net deferred tax liability of $7.3 million at December 31, 2021 represents the excess of our indefinite-lived deferred tax liabilities over our indefinite-lived deferred tax assets. We continue to provide a full valuation allowance against our other net deferred tax assets.

​

We record reserves for uncertain tax positions where we believe the ability to sustain the tax position does not reach a more likely than not threshold.

​

Results of Operations

For discussion related to the results of operations and changes in financial condition for the year ended December 31, 2020 compared to the year ended December 31, 2019 refer to “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in Part II, Item 7 of our 2020 Annual Report on Form 10-K, which was filed with the United States Securities and Exchange Commission on March 1, 2021.

Comparison of Years Ended December 31, 2021 and December 31, 2020

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended | ​ | ​ |
​ | ​ | December 31, | ​ | % Increase |
(in thousands) | ​ | 2021 | ​ | 2020 | ​ | (decrease) |
Statements of operations data: |  | ​ | ​ |  | ​ | ​ |  | ​ | ​
Net sales | ​ | $ | 294,011 | ​ | $ | 224,959 | ​ | 31 | %
Cost of sales | ​ | ​ | 66,627 | ​ |  | 91,719 | ​ | (27) | %
Gross profit | ​ | ​ | 227,384 | ​ |  | 133,240 | ​ | 71 | %
Operating expenses: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Selling, general and administrative | ​ | ​ | 179,257 | ​ |  | 171,401 | ​ | 5 | %
Research and development | ​ | ​ | 100,999 | ​ |  | 85,392 | ​ | 18 | %
In-process research and development | ​ | ​ | 10,000 | ​ | ​ | — | ​ | NM | ​
Litigation-related settlement | ​ | ​ | (30,000) | ​ | ​ | — | ​ | NM | ​
Total operating expenses | ​ | ​ | 260,256 | ​ |  | 256,793 | ​ | 1 | %
Loss from operations | ​ | ​ | (32,872) | ​ |  | (123,553) | ​ | (73) | %
Non-operating loss, net | ​ | ​ | (16,395) | ​ |  | (8,761) | ​ | 87 | %
Income tax provision (benefit) | ​ | ​ | 326 | ​ |  | (11,966) | ​ | NM | ​
Net loss | ​ | $ | (49,593) | ​ | $ | (120,348) | ​ | (59) | %

​

NM = Not Meaningful

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Net Sales

Our net sales are generated primarily from sales of iStent products to customers and sales of Photrexa and associated drug formulations as well as KXL systems to customers. Customers are primarily comprised of ambulatory surgery centers, hospitals and physician private practices, with distributors being used in certain international locations where we currently do not have a direct commercial presence.

Net sales for the years ended December 31, 2021 and December 31, 2020 were $294.0 million and $225.0 million, respectively, reflecting an increase of $69.0 million or 31%.

Net sales of glaucoma products in the U.S. were $170.8 million and $133.7 million for the years ended December 31, 2021 and December 31, 2020, respectively, increasing by approximately 28% primarily due to the demand for combined cataract and glaucoma procedures increasing during the year ended December 31, 2021 as compared to the year ended December 31, 2020 given a return to more normalized procedure levels following the rollout of the COVID-19 vaccines, a trend that generally continued throughout 2021, with periodic demand volatility in certain geographies in which we operate. We also believe the 2022 CMS physician fee and facility fee rate decreases that were proposed in July 2021 disrupted traditional customer ordering patterns and resulted in our customers’ trialing of competitive products.

​

International sales of glaucoma products for the years ended December 31, 2021 and December 31, 2020 were $61.2 million and $45.6 million, respectively, increasing by approximately 34%. The increase in international sales reflects growing demand in many key international markets for combined cataract and glaucoma procedures during the year ended December 31, 2021 as compared to the year ended December 31, 2020 given a return to more normalized procedure levels following the rollout of the COVID-19 vaccines, a trend that generally continued throughout 2021, with periodic demand volatility in certain international geographies in which we operate, and favorable foreign exchange rates compared to the prior year.

​

Net sales of corneal health products were $62.0 million and $45.6 million for the years ended December 31, 2021 and December 31, 2020, respectively, increasing by 36%. The $16.4 million increase in net sales generated from our corneal health products was comprised of an increase of approximately $13.6 million in U.S. sales using direct sales operations and an increase of $2.8 million internationally where we utilize distributors given we do not have a direct commercial presence, due to these distributors returning to their more stabilized pre-COVID ordering patterns. The $13.6 million increase in U.S. sales of corneal health products includes an increase of approximately $14.7 million of Photrexa net sales, partially offset by reductions of approximately $1.1 million in U.S. capital equipment sales. Sales of corneal health products in 2020 were negatively impacted by disruption resulting from COVID-19. Demand for corneal health products increased during the year ended December 31, 2021 given a return to more normalized procedure levels following the rollout of the COVID-19 vaccines, a trend that generally continued throughout 2021. Additionally, corneal health sales for the year ended December 31, 2021 were positively impacted by higher realized average sales and continued new account starts.

​

Cost of Sales

Cost of sales for the years ended December 31, 2021 and December 31, 2020 were $66.6 million and $91.7 million, respectively, reflecting a decrease of approximately $25.1 million or 27%. The decrease was primarily comprised of a decrease of approximately $24.7 million related to the acquisition fair market value inventory adjustment rollout that was fully amortized as of December 31, 2020, and a decrease of approximately $2.3 million, net related to the acquisition fair market value inventory adjustment recorded in 2020 in connection with the Avedro Merger that was fully amortized as of December 31, 2020. These decreases were partially offset by normal increases in cost of sales due to higher net sales for the year ended December 31, 2021 as compared to the year ended December 31, 2020. Our gross margin was approximately 77% for the year ended December 31, 2021 compared to approximately 59% for the year ended December 31, 2020. The increased gross margin resulted primarily from the increased net sales during the year ended December 31, 2021 as discussed above, the aforementioned fair market value inventory adjustment and, to a lesser extent, changes in product mix, most notably the inclusion of modestly lower margin products related to international market sales.

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Selling, General and Administrative Expenses

SG&A expenses for the years ended December 31, 2021 and December 31, 2020 were $179.3 million and $171.4 million, respectively, reflecting an increase of $7.9 million or 5%.

Of the total $179.3 million, approximately $102.6 million was comprised of compensation and related employee expenses, with the remaining $76.7 million spent on our marketing programs, advertising, post-approval clinical studies, conferences and congresses, travel expenses, costs associated with obtaining and maintaining our patent portfolio, and professional fees for accounting, auditing, consulting and legal services.

We incurred approximately $112.4 million and $98.2 million in commercial personnel and discretionary spending in the years ended December 31, 2021 and December 31, 2020, respectively, related primarily to existing sales infrastructure in glaucoma and corneal health. We also incurred approximately $66.8 million and $73.1 million of general and administrative personnel and discretionary spending for the years ended December 31, 2021 and December 31, 2020 associated with our ongoing administrative functions and amortization of our right-of-use asset related to our long-term lease for the Aliso Facility.

The above increase in SG&A expenses for the year ended December 31, 2021 was due to a return toward more normalized levels of spending to support increased demand for glaucoma and keratoconus procedures in certain key geographic markets in which we operate, relative to the year ended December 31, 2020, when we incurred temporary reductions in compensation and related employee expenses for our executive team, senior leadership, and many others throughout the company, and reduced professional services expenses as part of cost-savings measures in response to the COVID-19 pandemic. These increases in SG&A expenses during the year ended December 31, 2021 compared to the year ended December 31, 2020 were partially offset by approximately $5.2 million in decreased patent infringement expenses, $6.6 million in decreased stock-based compensation associated with the various stock option and restricted stock awards we granted in connection with the Avedro Merger, $2.2 million in decreased sales tax reserve and a decrease of approximately $1.5 million for costs incurred for restructuring and integration expenses related to the Avedro Merger.

Research and Development Expenses

R&D expenses for the years ended December 31, 2021 and December 31, 2020 were $101.0 million and $85.4 million, respectively, reflecting an increase of $15.6 million or 18%.

We incurred $66.6 million in core R&D expenses and $34.4 million in clinical expenses, comprised of $50.1 million in compensation and related employee expenses with the remaining $50.9 million spent on the continued research and development, clinical studies, regulatory activities, quality assurance, clinical inventory and supplies for surgical glaucoma product candidates and pharmaceutical projects, such as a pharmaceutical therapeutic system for the treatment of keratoconus without the removal of the epithelium (often referred to as “epi-on”), iDose and our earlier stage programs for dry eye, presbyopia, retina and other therapeutic investments.

In-Process Research and Development

IPR&D expenses for the year ended December 31, 2021 related to the amendment of our exclusive licensing agreement with Intratus and our Attillaps License Agreement. We paid $5.0 million upon signing of each of these agreements. There were no IPR&D expenses during the year ended December 31, 2020.

Litigation-related Settlement

The $30.0 million cash payment from the Settlement Agreement received during the year ended December 31, 2021 is included in litigation-related settlement as a reduction of operating expenses on the consolidated statements of operations.

Non-Operating (Expense) Income, Net

We had non-operating expense, net of $16.4 million and $8.8 million for the years ended December 31, 2021 and December 31, 2020, respectively. The increase in non-operating expense, net primarily relates to interest expense

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recognized related to the Convertible Notes and to the finance lease for our Aliso Facility, as well as recognition of unrealized foreign currency losses due to higher intercompany loan balances denominated in, and impacted by, changes in foreign currency exchange rates.

Income Tax Provision (Benefit)

Our effective tax rate for the year ended December 31, 2021 was not meaningful. For the year ended December 31, 2021 and December 31, 2020, we recorded a provision/(benefit) for income taxes of $0.3 million and $(12.0) million, respectively. For the year ended December 31, 2021, our tax provision was primarily comprised of state and foreign income taxes. For the year ended December 31, 2020, our tax benefit resulted from the issuance of the Convertible Notes partially offset by state and foreign income taxes.

Liquidity and Capital Resources

Our principal sources of liquidity are our existing cash, cash equivalents and short-term investments, cash generated from operating, financing and investing activities and proceeds from our senior convertible notes issuance. Our primary uses of cash have been for selling and marketing activities, research and development programs, and capital expenditures.

The following table summarizes our cash and cash equivalents, short-term investments and selected working capital data as of December 31, 2021 and December 31, 2020 (in thousands):

​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​ | December 31,
​ |  | 2021 |  | 2020
Cash and cash equivalents | ​ | $ | 100,708 | ​ | $ | 96,596
Short-term investments | ​ | ​ | 313,343 | ​ | ​ | 307,772
Accounts receivable, net | ​ | ​ | 33,438 | ​ | ​ | 36,059
Inventory | ​ | ​ | 23,011 | ​ | ​ | 15,809
Accounts payable | ​ | ​ | 7,333 | ​ | ​ | 4,371
Accrued liabilities | ​ | ​ | 56,027 | ​ | ​ | 45,331
Working capital (1) | ​ | ​ | 422,766 | ​ | ​ | 419,740

​

(1) | Working capital consists of total current assets less total current liabilities

Main Sources of Liquidity

​

We plan to fund our operations, commitments for capital expenditures and other short and long-term known contractual and other obligations using existing cash and investments and, to the extent available, cash generated from commercial operations. Our existing cash and investments include the remaining net proceeds from the Convertible Notes issued in June 2020 (after payment for the related capped call transactions), and the $30.0 million payment by Ivantis during the year ended December 31, 2021, which is being used for working capital and general corporate purposes. See above in the Material Changes and Transaction section of Item 2, Management’s Discussion and Analysis of Financial Condition and Results of Operations.

Cash, Cash Equivalents, Short-term Investments and Restricted Cash

​

Our cash, cash equivalents and short-term investments totaled approximately $414.1 million and our restricted cash totaled approximately $9.4 million.

​

Cash Flow from Operations

​

For the twelve months ended December 31, 2021, we had positive cash inflows of $24.7 million from operating activities.

​

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Senior Convertible Notes

​

Our Convertible Notes may be converted at the option of the holders at the times and under the circumstances and at the conversion rate described in Note 8 of the notes to our consolidated financial statements included in Part II, Item 8 of this Annual Report on Form 10-K. As of December 31, 2021, none of the conditions allowing holders of the Convertible Notes to convert had been met. These conditions are measured each quarter. For example, if our trading price remains above 130% of the conversion price for at least 20 trading days during the 30 consecutive trading-day period ending on, and including, March 31, 2022, holders of the Convertible Notes would have the right to convert their Convertible Notes during the calendar quarter beginning April 1, 2022. Upon conversion, we will pay or deliver, as the case may be, cash, shares of our common stock or a combination of cash and shares of our common stock, at our election, in the manner and subject to the terms and conditions provided in the Indenture. Settling all or a portion of the conversion obligation in cash could adversely affect our liquidity. In addition, even if holders of the Convertible Notes do not elect to convert their Convertible Notes, we could be required under applicable accounting rules to reclassify all or a portion of the outstanding principal of the Convertible Notes as a current rather than long-term liability, which would result in a material reduction of our net working capital.

​

We may seek to obtain additional financing in the future through other debt or equity financings. There can be no assurance that we will be able to obtain additional financing on terms acceptable to us, or at all and although we have been profitable for certain periods in our operating history, there can be no assurance that we will be profitable or generate cash from operations.

Short-term Liquidity Requirements

​

Our short-term liquidity requirements primarily consist of regular operating costs, interest payments related to our senior convertible notes, funding R&D projects, capital expenditures for the development of our facilities and office spaces as we continue our development of our Aliso Facility, and short-term material cash requirements as described below. As of December 31, 2021, we had net working capital of $422.8 million, which indicates that our current assets are more than enough to cover our short-term liabilities.

​

Long-term Liquidity Requirements

​

Our long-term liquidity requirements primarily consist of interest and principal payments related to our senior convertible notes, capital expenditures for the development of our manufacturing facilities and office spaces, and long-term material cash requirements as described below. As demand grows for our products, we will continue to expand global operations to meet demand through investments in manufacturing and operations.

​

Material Cash Requirements

The following table summarizes our material cash requirements, including commitments for capital expenditures and known contractual and other obligations as of December 31, 2021, and the amount required to satisfy those requirements in future periods.

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Payments due by period |
​ | ​ | ​ | ​ | ​ | Less than | ​ | ​ | ​ | ​ | ​ | ​ | ​ | More than |
(in thousands) | ​ | Total | ​ | 1 year | ​ | 1 - 3 years | ​ | 3 - 5 years | ​ | 5 years |
Operating and finance lease obligations |  | $ | 187,037 |  | $ | 3,365 |  | $ | 21,904 |  | $ | 17,473 | ​ | $ | 144,295 | ​
Interest payments on Convertible Senior Notes | ​ | ​ | 43,485 | ​ | ​ | 7,906 | ​ | ​ | 15,813 | ​ | ​ | 15,813 | ​ | ​ | 3,953 | ​
Firm purchase commitments | ​ |  | 28,043 | ​ |  | 26,172 | ​ |  | 1,871 | ​ |  | — | ​ |  | — | ​
Total | ​ | $ | 258,565 | ​ | $ | 37,443 | ​ | $ | 39,588 | ​ | $ | 33,286 | ​ | $ | 148,248 | ​

​

After funding the current operations of our commercial activities, the first planned use of our cash flow from operations is to provide capital funding for our R&D and clinical activities. In addition to investing in R&D and clinical activities, we expect to utilize cash for various capital expenditures including the expansion and enhancement of our

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facilities. We have made and expect to continue to make significant investments in our global sales force, marketing programs, research and development activities, clinical studies and general and administrative infrastructure. FDA-approved IDE and IND studies and new product development programs in our industry are expensive.

We believe that cash from operating, financing and investing activities, together with our cash and investment balances, will be sufficient to meet ongoing operations, capital expenditures, commitments, working capital requirements and other known contractual and other obligations and satisfy our liquidity requirements for at least the next 12 months and the foreseeable future.

Cash Flows

Our historical cash outflows have primarily been associated with cash used for operating activities such as the expansion of our sales, marketing and R&D activities; purchase of and growth in inventory and other working capital needs; the acquisition of intellectual property; and expenditures related to equipment and improvements used to increase our manufacturing capacity, to improve our manufacturing efficiency and for overall facility expansion.

The following table is a condensed summary of our cash flows for the periods indicated:

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended |
​ | ​ | December 31, |
(in thousands) | ​ | 2021 | ​ | 2020 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net cash provided by (used in): |  | ​ | ​ |  | ​ | ​ | ​
Operating activities | ​ | $ | 24,708 | ​ | $ | (22,988) | ​
Investing activities | ​ | ​ | (58,232) | ​ |  | (205,060) | ​
Financing activities | ​ | ​ | 39,260 | ​ |  | 262,542 | ​
Exchange rate changes | ​ | ​ | (1,774) | ​ |  | (88) | ​
Net increase in cash, cash equivalents and restricted cash | ​ | $ | 3,962 | ​ | $ | 34,406 | ​

At December 31, 2021, our cash and cash equivalents were held for working capital purposes. We do not enter into investments for trading or speculative purposes. Our policy is to invest any cash in excess of our immediate requirements in investments designed to preserve the principal balance and provide liquidity.

Operating Activities

In the year ended December 31, 2021 our operating activities provided $24.7 million and for the years ended December 31, 2020 our operating activities used $23.0 million.

For the year ended December 31, 2021, our net cash provided by operating activities reflected our net loss of $49.6 million, adjusted for non-cash items of $70.7 million, primarily consisting of stock-based compensation expense of $30.1 million, depreciation and amortization of $29.7 million, amortization of lease right-of-use assets of $4.8 million, and amortization of debt issuance costs of $1.4 million. This was partially offset by changes in operating assets and liabilities of $3.6 million, which resulted from increases in accounts payable and accrued liabilities and decreases in accounts receivable, partially offset by increases in inventory and prepaids and other current assets.

For the year ended December 31, 2020, our net cash used in operating activities reflected our net loss of $120.3 million, adjusted for non-cash items of $100.6 million, primarily consisting of stock-based compensation expense of $46.5 million, depreciation and amortization of $29.4 million, amortization of the inventory fair value adjustment as a result of the Avedro Merger of $24.7 million, amortization of lease right-of-use assets of $5.2 million, the fair value of cash-settled stock options of $3.2 million and a deferred income tax benefit of $12.2 million. This was offset by changes in operating assets and liabilities of $3.2 million, which resulted from decreases in accounts receivable, inventory, and other assets partially offset by decreases in accounts payable and accrued liabilities and increases in prepaid expenses and other assets.

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Investing Activities

In the year ended December 31, 2021 and December 31, 2020 net cash from investing activities used approximately $58.2 million and $205.1 million, respectively.

In the year ended December 31, 2021, we used approximately $215.3 million for purchases of short-term investments, received proceeds from sales and maturities of short-term investments of $206.9 million and used approximately $2.1 million related to investments in company-owned life insurance.

In the year ended December 31, 2020, we used approximately $301.0 million for purchases of short-term investments, received proceeds from sales and maturities of short-term investments of $104.7 million and used approximately $1.8 million related to investments in company-owned life insurance.

Cash used for purchases of property and equipment was approximately $47.8 million and $6.9 million for the years ended December 31, 2021 and December 31, 2020, respectively.

We expect to increase our investment in property and equipment in the future as we expand our manufacturing capacity for current and new products, improve our manufacturing efficiency and for overall facility expansion, as discussed above.

Financing Activities

In the years ended December 31, 2021 and December 31, 2020 our financing activities provided $39.3 million and $262.5 million of net cash, respectively.

In the year ended December 31, 2021, we received $30.9 million from the exercises of stock options and purchases of our common stock by employees pursuant to our Employee Stock Purchase Plan and used $3.7 million for payment of employee taxes related to restricted stock unit vestings. Additionally, we received $12.7 million in proceeds from our tenant improvement allowances of our Aliso Facility and paid $0.7 million in principal on our finance lease.

In the year ended December 31, 2020, we received net cash proceeds of approximately $287.5 million related to our Convertible Notes, used $9.6 million for transaction costs related to the Convertible Notes and used $35.7 million on payment of the capped call transaction related to the Convertible Notes. We received net cash proceeds of approximately $24.2 million from the exercises of stock options and purchases of our common stock by employees pursuant to our Employee Stock Purchase Plan and used $3.9 million for payment of employee taxes related to restricted stock unit vestings.

In addition to the amounts included in the table above, there may be material cash obligations related to our Convertible Notes in the event they become convertible and are converted.

We do not have any significant off-balance sheet arrangements or holdings in variable interest entities.

Critical Accounting Policies and Significant Estimates

Management’s discussion and analysis of our financial condition and results of operations are based on our consolidated financial statements, which have been prepared in accordance with U.S. generally accepted accounting principles (GAAP). The preparation of these consolidated financial statements requires us to make estimates and judgments that affect the reported amounts of assets and liabilities and related disclosure of contingent assets and liabilities, revenue and expenses at the date of the consolidated financial statements. Generally, we base our estimates on historical experience and on various other assumptions in accordance with GAAP that we believe to be reasonable under the circumstances. Actual results may differ materially from these estimates under different assumptions or conditions and such differences could be material to our financial position and results of operations.

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While our significant accounting policies are more fully described below and in the Notes to our consolidated financial statements appearing elsewhere in this Annual Report on Form 10-K, we believe the following accounting policies to be most critical for fully understanding and evaluating our financial condition and results of operations.

Revenue Recognition

We derive our revenue from sales of our products in the United States and internationally. Customers are primarily comprised of ambulatory surgery centers, hospitals and physician private practices, with distributors being used in certain international locations where we do not have a direct commercial presence.

​

We concluded that one performance obligation exists for the majority of our contracts with customers which is to deliver products in accordance with our normal delivery times. Revenue is recognized when this performance obligation is satisfied, which is the point in time when we consider control of a product to have transferred to the customer. Revenue recognized reflects the consideration to which we expect to be entitled in exchange for those products or services. We have determined the transaction price to be the invoice price, net of adjustments, which includes estimates of variable consideration for certain product returns. We only recognize revenue when it is probable that we will collect the consideration we are entitled to in exchange for the goods transferred to a customer. This requires management to perform an assessment related to the probability of collecting the consideration. The assessment can contain judgment when it is performed for customers with declining credit conditions or those with no history or a limited history of product sales with us.

​

We offer volume-based rebate agreements to certain customers and, in these instances, we provide a rebate (in the form of a credit memo) at the contract’s conclusion, if earned by the customer. In such cases, the transaction price is allocated between our delivery of product and the issuance of a rebate at the contract’s conclusion for the customer to utilize on prospective purchases. The performance obligation to issue a customer’s rebate, if earned, is transferred over time and our method of measuring progress is the output method, whereby the progress is measured by the estimated rebate earned to date over the total rebate estimated to be earned over the contract period. The provision for volume-based rebates is estimated based on customers' contracted rebate programs and the customers’ projected sales levels. We periodically monitor our customer rebate programs to ensure the rebate allowance is fairly stated. Our rebate allowance is included in accrued liabilities in the consolidated balance sheets and estimated rebates accrued were not material during the periods presented.

​

Customers are not granted specific rights of return; however, we may permit returns of certain products from customers if such product is returned in a timely manner and in good condition. We generally provide a warranty on our products for one year from the date of shipment, and offer an extended warranty for our KXL systems. Any product found to be defective or out of specification will be replaced or serviced at no charge during the warranty period. Estimated allowances for sales returns and warranty replacements are recorded at the time of sale of the product and are estimated based upon the historical patterns of product returns matched against sales, and an evaluation of specific factors that may increase the risk of product returns. Product returns and warranty replacements to date have been consistent with amounts reserved or accrued and have not been significant. If actual results in the future vary from our estimates, we will adjust these estimates which would affect net product revenue and earnings in the period such variances become known.

​

Stock-Based Compensation Expense

Stock-based compensation expense for stock options is measured at the date of grant, based on the estimated fair value of the award using the Black-Scholes option pricing model.

Stock-based compensation expense for restricted stock units is also measured at the date of grant, based on the closing price of our common stock.

For awards subject to time-based vesting conditions, we recognize stock-based compensation expense over the requisite service period on a straight-line basis, net of estimated forfeitures.

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The estimation of the fair value of each stock-based option grant or issuance on the date of grant involves numerous assumptions by management. Although we calculate the fair value under the Black-Scholes option pricing model, which is a standard option pricing model, this model still requires the use of numerous assumptions, including, among others, the expected life (turnover), volatility of the underlying equity security, a risk free interest rate and expected dividends. During the year ended December 31, 2021 the Company based the expected volatility on a weighted average of the historical volatility of its common stock and historical volatilities of a peer group of similar companies over the most recent period commensurate with the estimated expected term of the Company’s stock options. During the years ended December 31, 2020 and 2019, the expected volatility assumption was based on historical volatilities of a peer group of similar companies whose share prices were publicly available. The peer group was developed based on companies in the biotechnology industry. We have estimated the expected term of our stock options using the “simplified” method, whereby the expected life equals the average of the vesting term and the original contractual term of the option. The use of different values by management in connection with these assumptions in the Black-Scholes option pricing model could produce substantially different results.

Recent Accounting Pronouncements

For a description of recent accounting pronouncements, see Note 2 of the notes to our consolidated financial statements included in Part II, Item 8 of this Annual Report on Form 10-K.

​

ITEM 7A. Quantitative and qualitative disclosures about market risk

Interest Rate Risk

We are exposed to market risks in the ordinary course of our business. Our cash and cash equivalents include cash in readily available checking and money market accounts, as well as a certificate of deposit. These securities are not dependent on interest rate fluctuations that could cause the principal amount of these assets to fluctuate and thus do not pose any interest rate risk to us. While we believe our cash and cash equivalents do not contain excessive risk, we cannot provide absolute assurance that in the future our investments will not be subject to adverse changes in market value.

In addition, we maintain significant amounts of cash and cash equivalents at one or more financial institutions that are in excess of federally insured limits.

Foreign Currency Exchange Risk

The financial statements of our foreign subsidiaries and their sales to customers are denominated in the foreign subsidiaries’ respective functional currencies, and therefore we have exposure to foreign currency exchange rates. The remainder of our business is primarily denominated in U.S. dollars. The effect of a 10% adverse change in exchange rates on foreign denominated cash, receivables and payables would not have been material for the periods presented. As our international operations grow, our results of operations and cash flows will be subject to fluctuations due to changes in foreign currency exchange rates, which could harm our business in the future. To date, we have not entered into any material foreign currency hedging contracts although we may do so in the future.

​

​

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ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

Index to Consolidated Financial Statements

Report of Independent Registered Public Accounting Firm (PCAOB ID: 42) | 53
Consolidated Balance Sheets | 55
Consolidated Statements of Operations | 56
Consolidated Statements of Comprehensive (Loss) Income | 57
Consolidated Statements of Stockholders’ Equity | 58
Consolidated Statements of Cash Flows | 59
Notes to Consolidated Financial Statements | 60

​

​

​

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Report of Independent Registered Public Accounting Firm

To the Stockholders and the Board of Directors of Glaukos Corporation

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Glaukos Corporation (the Company) as of December 31, 2021 and 2020, the related consolidated statements of operations, comprehensive (loss) income, stockholders' equity and cash flows for each of the three years in the period ended December 31, 2021, and the related notes (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company at December 31, 2021 and 2020, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2021, in conformity with U.S. generally accepted accounting principles.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of December 31, 2021, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework), and our report dated February 28, 2022 expressed an unqualified opinion thereon.

Adoption of ASU No. 2020-06

As discussed in Note 8 to the consolidated financial statements, the Company changed its method for accounting for convertible debt in 2021 due to the adoption of Accounting Standards Update (ASU) No. 2020-06, Debt—Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging—Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity.

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 audits. 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 audits 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 audits 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 audits 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 audits provide a reasonable basis for our opinion.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current period audit of the consolidated financial statements that was communicated or required to be communicated to the audit committee and that: (1) relates to accounts or disclosures that are material to the consolidated financial statements and (2) involved our especially challenging, subjective or complex judgments. The communication of the critical audit matter does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

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​ | ​ |
​ | ​ | ​ Revenue from contracts with customers
Description of the Matter | ​ | As discussed in Note 2 of the consolidated financial statements, the Company derives its revenue from sales of its products in the United States and internationally. Customers are primarily comprised of ambulatory surgery centers, hospitals and physician private practices. The Company concluded that one performance obligation exists for the majority of its contracts with customers which is to deliver products in accordance with the Company’s normal delivery times. Revenue is recognized when this performance obligation is satisfied at a point in time when the Company considers control of a product to have transferred to the customer. Revenue recognized reflects the consideration to which the Company expects to be entitled in exchange for those products or services. Auditing the Company’s revenue was complex due to the subjectivity in determining the collectability of sales to the Company’s customers. For those contracts that otherwise meet the revenue recognition criteria, the Company only recognizes revenue when it is probable that the entity will collect the consideration it is entitled to in exchange for the goods it transfers to the customer. This requires management to perform an assessment related to the probability of collecting the consideration. The assessment can contain judgment when it is performed for customers with declining credit conditions or those with no history or a limited history of product sales with the Company.
How We Addressed the Matter in Our Audit | ​ | We obtained an understanding, evaluated the design and tested the operating effectiveness of controls over the Company’s process of recording revenue from sales of its products, including controls over the review and approval of customer credit terms. We also tested management’s controls related to the completeness and accuracy of data, including calculations, utilized in the controls. To test product revenue, our audit procedures included, among others, inspecting the application of the Company’s credit policy to ensure consistency in how the Company evaluated whether a customer is creditworthy and to ensure that this evaluation was based on objective and verifiable criteria. To this end, we obtained a sample of credit reports, recent financial information, historical payment information, or other relevant information as applicable. We also confirmed on a sample basis that the customers’ payment history does not demonstrate significant bad debt expense or significant increases in the allowance for doubtful accounts. To test management’s assessment related to the probability of collection we investigated a sample of customers to obtain evidence of financial condition. ​

​

/s/ Ernst & Young LLP

We have served as the Company's auditor since 2006.

Irvine, California

February 28, 2022

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Glaukos Corporation

Consolidated Balance Sheets

(in thousands, except par values)

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, |
​ | ​ | 2021 | ​ | 2020 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Assets |  |  |  |  | ​ |  | ​
Current assets: | ​ | ​ | ​ | ​ | ​ | ​ | ​
Cash and cash equivalents |  | $ | 100,708 | ​ | $ | 96,596 | ​
Short-term investments | ​ | ​ | 313,343 | ​ | ​ | 307,772 | ​
Accounts receivable, net | ​ | ​ | 33,438 | ​ |  | 36,059 | ​
Inventory | ​ | ​ | 23,011 | ​ |  | 15,809 | ​
Prepaid expenses and other current assets | ​ | ​ | 15,626 | ​ |  | 13,206 | ​
Total current assets | ​ | ​ | 486,126 | ​ |  | 469,442 | ​
Restricted cash | ​ | ​ | 9,416 | ​ | ​ | 9,566 | ​
Property and equipment, net | ​ | ​ | 68,969 | ​ |  | 24,008 | ​
Operating lease right-of-use asset | ​ | ​ | 28,142 | ​ | ​ | 20,009 | ​
Finance lease right-of-use asset | ​ | ​ | 49,022 | ​ | ​ | 51,443 | ​
Intangible assets, net | ​ | ​ | 332,781 | ​ |  | 357,693 | ​
Goodwill | ​ | ​ | 66,134 | ​ | ​ | 66,134 | ​
Deposits and other assets | ​ | ​ | 9,108 | ​ |  | 7,207 | ​
Total assets |  | $ | 1,049,698 | ​ | $ | 1,005,502 | ​
Liabilities and stockholders' equity | ​ | ​ | ​ | ​ | ​ | ​ | ​
Current liabilities: | ​ | ​ | ​ | ​ | ​ | ​ | ​
Accounts payable |  | $ | 7,333 | ​ | $ | 4,371 | ​
Accrued liabilities | ​ | ​ | 56,027 | ​ |  | 45,331 | ​
Total current liabilities | ​ | ​ | 63,360 | ​ | ​ | 49,702 | ​
Convertible senior notes | ​ | ​ | 280,026 | ​ |  | 189,416 | ​
Operating lease liability | ​ | ​ | 29,650 | ​ | ​ | 20,704 | ​
Finance lease liability | ​ | ​ | 72,699 | ​ | ​ | 60,690 | ​
Deferred tax liability, net | ​ | ​ | 7,318 | ​ | ​ | 10,512 | ​
Other liabilities | ​ | ​ | 9,494 | ​ |  | 7,029 | ​
Total liabilities | ​ | ​ | 462,547 | ​ |  | 338,053 | ​
Commitments and contingencies (Note 12) | ​ | ​ | ​ | ​ | ​ | ​ | ​
Stockholders’ equity: | ​ | ​ | ​ | ​ | ​ | ​ | ​
Preferred stock, $0.001 par value; 5,000 shares authorized; no shares issued and outstanding as of December 31, 2021 and December 31, 2020 | ​ |  | — | ​ |  | — | ​
Common stock, $0.001 par value; 150,000 shares authorized; 46,993 and 45,275 shares issued and 46,965 and 45,247 shares outstanding at December 31, 2021 and December 31, 2020, respectively | ​ | ​ | 47 | ​ |  | 45 | ​
Additional paid-in capital | ​ | ​ | 952,432 | ​ |  | 976,590 | ​
Accumulated other comprehensive income | ​ | ​ | 15 | ​ |  | 1,004 | ​
Accumulated deficit | ​ |  | (365,211) | ​ |  | (310,058) | ​
Less treasury stock (28 shares as of December 31, 2021 and December 31, 2020) | ​ |  | (132) | ​ |  | (132) | ​
Total stockholders’ equity | ​ |  | 587,151 | ​ |  | 667,449 | ​
Total liabilities and stockholders' equity |  | $ | 1,049,698 | ​ | $ | 1,005,502 | ​

​

See accompanying notes to consolidated financial statements.

​

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Glaukos Corporation

Consolidated Statements of Operations

(in thousands, except per share amounts)

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended |
​ | ​ | December 31, |
​ | ​ | 2021 | ​ | 2020 | ​ | 2019 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net sales |  | $ | 294,011 |  | $ | 224,959 |  | $ | 236,984 | ​
Cost of sales | ​ | ​ | 66,627 | ​ |  | 91,719 | ​ |  | 38,588 | ​
Gross profit | ​ | ​ | 227,384 | ​ |  | 133,240 | ​ |  | 198,396 | ​
Operating expenses: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Selling, general and administrative | ​ | ​ | 179,257 | ​ |  | 171,401 | ​ |  | 176,635 | ​
Research and development | ​ | ​ | 100,999 | ​ |  | 85,392 | ​ |  | 68,308 | ​
In-process research and development | ​ | ​ | 10,000 | ​ | ​ | — | ​ | ​ | 3,745 | ​
Litigation-related settlement | ​ | ​ | (30,000) | ​ | ​ | — | ​ | ​ | — | ​
Total operating expenses | ​ | ​ | 260,256 | ​ |  | 256,793 | ​ |  | 248,688 | ​
Loss from operations | ​ | ​ | (32,872) | ​ |  | (123,553) | ​ |  | (50,292) | ​
Non-operating (expense) income: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Interest income | ​ | ​ | 1,288 | ​ |  | 2,379 | ​ |  | 3,169 | ​
Interest expense | ​ | ​ | (13,372) | ​ | ​ | (14,115) | ​ | ​ | (2,565) | ​
Other (expense) income, net | ​ | ​ | (4,311) | ​ |  | 2,975 | ​ |  | (348) | ​
Total non-operating (expense) income | ​ | ​ | (16,395) | ​ |  | (8,761) | ​ |  | 256 | ​
Loss before taxes | ​ | ​ | (49,267) | ​ |  | (132,314) | ​ |  | (50,036) | ​
Income tax provision (benefit) | ​ | ​ | 326 | ​ |  | (11,966) | ​ |  | (65,460) | ​
Net (loss) income | ​ | $ | (49,593) | ​ | $ | (120,348) | ​ | $ | 15,424 | ​
Basic net (loss) income per share | ​ | $ | (1.07) | ​ | $ | (2.70) | ​ | $ | 0.41 | ​
Diluted net (loss) income per share | ​ | $ | (1.07) | ​ | $ | (2.70) | ​ | $ | 0.37 | ​
Weighted-average shares used to compute basic net (loss) income per share | ​ | ​ | 46,423 | ​ | ​ | 44,497 | ​ | ​ | 37,355 | ​
Weighted-average shares used to compute diluted net (loss) income per share | ​ | ​ | 46,423 | ​ | ​ | 44,497 | ​ | ​ | 41,145 | ​

​

See accompanying notes to consolidated financial statements.

​

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Glaukos Corporation

Consolidated Statements of Comprehensive (Loss) Income

(in thousands)

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended |
​ | ​ | December 31, |
​ | ​ | 2021 | ​ | 2020 | ​ | 2019 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net (loss) income |  | $ | (49,593) |  | $ | (120,348) |  | $ | 15,424 | ​
Other comprehensive (loss) income: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Foreign currency translation gain (loss) | ​ | ​ | 781 | ​ |  | (691) | ​ |  | (65) | ​
Unrealized (loss) gain on short-term investments | ​ | ​ | (1,770) | ​ | ​ | 365 | ​ | ​ | 657 | ​
Other comprehensive (loss) income | ​ | ​ | (989) | ​ |  | (326) | ​ |  | 592 | ​
Total comprehensive (loss) income | ​ | $ | (50,582) | ​ | $ | (120,674) | ​ | $ | 16,016 | ​

​

See accompanying notes to consolidated financial statements.

​

​

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Glaukos Corporation

Consolidated Statements of Stockholders’ Equity

(in thousands)

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Accumulated | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Additional | ​ | other | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Common stock | ​ | paid-in | ​ | comprehensive | ​ | Accumulated | ​ | Treasury stock | ​ | Total
​ |  | Shares |  | Amount |  | capital |  | income (loss) |  | deficit |  | Shares |  | Amount |  | equity
Balance at December 31, 2018 | ​ | 36,135 | ​ | $ | 36 | ​ | $ | 378,352 | ​ | $ | 738 | ​ | $ | (205,134) |  | (28) | ​ | $ | (132) | ​ | $ | 173,860
Common stock issued under stock plans | ​ | 942 | ​ |  | 1 | ​ |  | 12,850 | ​ |  | — | ​ |  | — |  | — | ​ |  | — | ​ | ​ | 12,851
Issuance of common stock in connection with the Avedro Merger | ​ | 6,453 | ​ | ​ | 7 | ​ | ​ | 406,956 | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 406,963
Value of Replacement Awards issued in the Avedro Merger attributable to pre-combination services | ​ | — | ​ | ​ | — | ​ | ​ | 27,189 | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 27,189
Stock-based compensation | ​ | — | ​ |  | — | ​ |  | 36,393 | ​ |  | — | ​ |  | — |  | — | ​ |  | — | ​ | ​ | 36,393
Other comprehensive income | ​ | — | ​ |  | — | ​ |  | — | ​ |  | 592 | ​ |  | — |  | — | ​ |  | — | ​ | ​ | 592
Net income | ​ | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 15,424 |  | — | ​ |  | — | ​ | ​ | 15,424
Balance at December 31, 2019 | ​ | 43,530 | ​ | $ | 44 | ​ | $ | 861,740 | ​ | $ | 1,330 | ​ | $ | (189,710) |  | (28) | ​ | $ | (132) | ​ | $ | 673,272
Common stock issued under stock plans | ​ | 1,745 | ​ |  | 1 | ​ |  | 20,334 | ​ |  | — | ​ |  | — |  | — | ​ |  | — | ​ |  | 20,335
Equity component of convertible senior notes, net of transaction costs of $3,267 and taxes of $12,891 | ​ | — | ​ |  | — | ​ | ​ | 81,554 | ​ | ​ | — | ​ | ​ | — | ​ | — | ​ | ​ | — | ​ | ​ | 81,554
Purchase of capped calls related to issuance of convertible senior notes | ​ | — | ​ |  | — | ​ | ​ | (35,679) | ​ | ​ | — | ​ | ​ | — | ​ | — | ​ | ​ | — | ​ | ​ | (35,679)
Stock-based compensation | ​ | — | ​ |  | — | ​ |  | 48,641 | ​ |  | — | ​ |  | — |  | — | ​ |  | — | ​ |  | 48,641
Other comprehensive loss | ​ | — | ​ |  | — | ​ |  | — | ​ |  | (326) | ​ |  | — |  | — | ​ |  | — | ​ |  | (326)
Net loss | ​ | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | (120,348) |  | — | ​ |  | — | ​ |  | (120,348)
Balance at December 31, 2020 | ​ | 45,275 | ​ | $ | 45 | ​ | $ | 976,590 | ​ | $ | 1,004 | ​ | $ | (310,058) | ​ | (28) | ​ | $ | (132) | ​ | $ | 667,449
Common stock issued under stock plans | ​ | 1,718 | ​ |  | 2 | ​ |  | 27,249 | ​ |  | — | ​ |  | — |  | — | ​ |  | — | ​ |  | 27,251
Stock-based compensation | ​ | — | ​ |  | — | ​ |  | 30,146 | ​ |  | — | ​ |  | — |  | — | ​ |  | — | ​ |  | 30,146
Effect of adoption of ASU 2020-06 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | (81,553) | ​ | ​ | — | ​ | ​ | (5,560) | ​ | — | ​ | ​ | — | ​ | ​ | (87,113)
Other comprehensive loss | ​ | — | ​ |  | — | ​ |  | — | ​ |  | (989) | ​ |  | — |  | — | ​ |  | — | ​ |  | (989)
Net loss | ​ | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | (49,593) |  | — | ​ |  | — | ​ |  | (49,593)
Balance at December 31, 2021 | ​ | 46,993 | ​ | $ | 47 | ​ | $ | 952,432 | ​ | $ | 15 | ​ | $ | (365,211) | ​ | (28) | ​ | $ | (132) | ​ | $ | 587,151

​

See accompanying notes to consolidated financial statements.

​

​

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Glaukos Corporation

Consolidated Statements of Cash Flows

(in thousands)

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended |
​ | ​ | December 31, |
​ | ​ | 2021 | ​ | 2020 | ​ | 2019 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Operating Activities |  | ​ |  | ​ | ​ |  |  | ​ |  | ​
Net (loss) income | ​ | $ | (49,593) | ​ | $ | (120,348) | ​ | $ | 15,424 | ​
Adjustments to reconcile net (loss) income to net cash provided by (used in) operating activities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Depreciation and amortization | ​ | ​ | 29,661 | ​ |  | 29,381 | ​ |  | 6,306 | ​
Amortization of the fair market value inventory adjustment as a result of the Avedro Merger | ​ | ​ | — | ​ | ​ | 24,712 | ​ | ​ | 4,026 | ​
Amortization of right-of-use lease assets | ​ | ​ | 4,760 | ​ | ​ | 5,232 | ​ | ​ | 3,557 | ​
Amortization of debt issuance costs | ​ | ​ | 1,373 | ​ | ​ | 364 | ​ | ​ | — | ​
Amortization of debt discount | ​ | ​ | — | ​ | ​ | 5,610 | ​ | ​ | — | ​
Deferred income tax benefit | ​ | ​ | (1,029) | ​ | ​ | (12,176) | ​ | ​ | (66,306) | ​
Loss on disposal of fixed assets | ​ | ​ | 7 | ​ |  | 367 | ​ |  | 430 | ​
Stock-based compensation | ​ |  | 30,146 | ​ |  | 46,477 | ​ |  | 36,393 | ​
Change in fair value of cash-settled stock options | ​ | ​ | — | ​ | ​ | (3,172) | ​ | ​ | 3,088 | ​
Unrealized foreign currency losses (gains) | ​ | ​ | 2,313 | ​ |  | (1,202) | ​ |  | 194 | ​
Amortization of premium (discount) on short-term investments | ​ |  | 1,028 | ​ |  | 453 | ​ |  | (338) | ​
Other liabilities | ​ |  | 2,465 | ​ |  | 4,538 | ​ |  | 5,352 | ​
Changes in operating assets and liabilities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Accounts receivable, net | ​ |  | 1,700 | ​ |  | 2,243 | ​ |  | (6,632) | ​
Inventory | ​ |  | (7,703) | ​ |  | 1,962 | ​ |  | 52 | ​
Prepaid expenses and other current assets | ​ |  | (3,054) | ​ |  | (5,033) | ​ |  | (917) | ​
Accounts payable and accrued liabilities | ​ | ​ | 12,448 | ​ |  | (2,683) | ​ |  | 779 | ​
Other assets | ​ |  | 186 | ​ |  | 287 | ​ |  | (1,777) | ​
Net cash provided by (used in) operating activities | ​ |  | 24,708 | ​ |  | (22,988) | ​ |  | (369) | ​
Investing activities | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Cash acquired due to acquisition | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 49,652 | ​
Purchases of property and equipment | ​ |  | (47,785) | ​ |  | (6,935) | ​ |  | (4,724) | ​
Purchases of short-term investments | ​ |  | (215,285) | ​ |  | (301,002) | ​ |  | (80,388) | ​
Proceeds from sales and maturities of short-term investments | ​ | ​ | 206,916 | ​ |  | 104,697 | ​ |  | 80,494 | ​
Proceeds from disposal of property and equipment | ​ | ​ | 3 | ​ | ​ | — | ​ | ​ | — | ​
Investment in company-owned life insurance | ​ | ​ | (2,081) | ​ | ​ | (1,820) | ​ | ​ | (1,608) | ​
Net cash (used in) provided by investing activities | ​ |  | (58,232) | ​ |  | (205,060) | ​ |  | 43,426 | ​
Financing activities | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Proceeds from convertible senior notes | ​ | ​ | — | ​ | ​ | 287,500 | ​ | ​ | — | ​
Payment of convertible senior notes transaction costs | ​ | ​ | — | ​ | ​ | (9,614) | ​ | ​ | — | ​
Purchase of capped calls related to issuance of convertible senior notes | ​ | ​ | — | ​ | ​ | (35,679) | ​ | ​ | — | ​
Proceeds from exercise of stock options | ​ | ​ | 26,124 | ​ |  | 20,196 | ​ |  | 15,064 | ​
Share purchases under Employee Stock Purchase Plan | ​ | ​ | 4,817 | ​ | ​ | 4,025 | ​ | ​ | 3,388 | ​
Payments of employee taxes related to vested restricted stock units | ​ | ​ | (3,690) | ​ | ​ | (3,886) | ​ | ​ | (5,601) | ​
Payment of debt assumed in the Avedro Merger | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (22,496) | ​
Proceeds from tenant improvement allowance | ​ |  | 12,668 | ​ |  | — | ​ |  | — | ​
Principal paid on finance lease | ​ | ​ | (659) | ​ | ​ | — | ​ | ​ | — | ​
Net cash provided by (used in) financing activities | ​ |  | 39,260 | ​ |  | 262,542 | ​ |  | (9,645) | ​
Effect of exchange rate changes on cash and cash equivalents | ​ | ​ | (1,774) | ​ |  | (88) | ​ |  | (252) | ​
Net increase in cash, cash equivalents and restricted cash | ​ | ​ | 3,962 | ​ |  | 34,406 | ​ |  | 33,160 | ​
Cash, cash equivalents and restricted cash at beginning of period | ​ | ​ | 106,162 | ​ |  | 71,756 | ​ |  | 38,596 | ​
Cash, cash equivalents and restricted cash at end of period | ​ | $ | 110,124 | ​ | $ | 106,162 | ​ | $ | 71,756 | ​
Supplemental schedule of noncash investing and financing activities | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Shares issued, and Replacement Awards assumed, in connection with Avedro Merger | ​ | $ | — | ​ | $ | — | ​ | $ | 437,751 | ​
Debt assumed in the Avedro Merger | ​ | $ | — | ​ | $ | — | ​ | $ | 22,496 | ​
Purchases of property and equipment included in accounts payable and accrued liabilities | ​ | $ | 2,263 | ​ | $ | 641 | ​ | $ | 995 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Supplemental disclosures of cash flow information | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Taxes paid, net of refunds | ​ | $ | 272 | ​ | $ | 484 | ​ | $ | 171 | ​
Interest paid on convertible senior notes | ​ | $ | 7,907 | ​ | $ | 4,041 | ​ | $ | 2 | ​
Other interest paid | ​ | $ | 4,074 | ​ | $ | 1,334 | ​ | $ | — | ​

​

See accompanying notes to consolidated financial statements.

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Glaukos Corporation

Notes to Consolidated Financial Statements

Note 1. | Organization and Basis of Presentation

Organization and Business

Glaukos Corporation (Glaukos or the Company), incorporated in Delaware on July 14, 1998, is an ophthalmic medical technology and pharmaceutical company focused on developing novel therapies for the treatment of glaucoma, corneal disorders, and retinal disease. The Company developed Micro-Invasive Glaucoma Surgery (MIGS) to serve as an alternative to the traditional glaucoma treatment paradigm and launched its first MIGS device commercially in 2012. The Company also offers commercially a proprietary bio-activated pharmaceutical therapy for the treatment of a corneal disorder, keratoconus, that was approved by the U.S. Food and Drug Administration (FDA) in 2016 and is developing a pipeline of sustained pharmaceutical therapies, surgical devices, and implantable biosensors intended to treat glaucoma progression, corneal disorders such as keratoconus, dry eye and refractive vision correction, and retinal diseases such as neovascular age-related macular degeneration, diabetic macular edema and retinal vein occlusion.

On November 21, 2019, the Company acquired Avedro, Inc. (Avedro), a hybrid ophthalmic pharmaceutical and medical technology company focused on developing therapies designed to treat corneal diseases and disorders and correct refractive conditions, in a stock-for-stock transaction (Avedro Merger). Avedro developed novel bio-activated drug formulations used in combination with proprietary systems for the treatment of progressive keratoconus and corneal ectasia following refractive surgery. The therapy is the first and only minimally invasive anterior segment product offering approved by the FDA shown to halt the progression of keratoconus.

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

Recent Developments

2022 U.S. reimbursement rates

On November 2, 2021, the United States (U.S.) Centers for Medicare & Medicaid Services (CMS) published its final rules for 2022 Medicare physician fee payment rates and 2022 Medicare facility fee payment rates for services furnished in both the ambulatory surgery center and hospital outpatient settings (Final Rules). These Final Rules superseded the proposed rates that were issued by CMS in July 2021 and took effect January 1, 2022.

​

Attillaps License Agreement

On September 20, 2021, the Company announced that it had entered into a licensing agreement (Attillaps License Agreement) with Attillaps Holdings, Inc. (Attillaps) under which Attillaps granted the Company a global exclusive license to Attillaps’ proprietary library of investigational pharmaceutical compounds that target the eradication of Demodex mites, which are the root cause of Demodex blepharitis and often associated with meibomian gland dysfunction and related ophthalmic diseases. Under the Attillaps Licensing Agreement, the Company has the exclusive global right to research, develop, manufacture and commercialize products using certain acetylcholinesterase inhibitors for the treatment of ophthalmic diseases caused by Demodex mites. The Company paid $5.0 million upon the signing of the Attillaps License Agreement, which is included in in-process research and development within the consolidated statements of operations, as management determined there were no alternative future uses for the technology acquired. The Company will have ongoing milestone and royalty payment obligations depending on the success of the development, approval and commercialization of the compounds.

Settlement of Patent Litigation

On September 14, 2021, the Company entered into a settlement agreement (Settlement Agreement) with

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Ivantis, Inc. (Ivantis), pursuant to which the Company and Ivantis agreed to terminate the patent infringement lawsuit we had filed against Ivantis on April 14, 2018 in the U.S. District Court for the Central District of California, Southern Division (the Lawsuit). In the Lawsuit, the Company alleged that Ivantis’ Hydrus® Microstent device infringes the Company’s U.S. Patent Nos. 6,626,858 and 9,827,143. Pursuant to the terms of the Settlement Agreement, Ivantis was to pay the Company a cash payment of $60.0 million, $30.0 million of which was paid to the Company during the year ended December 31, 2021, and $30.0 million of which will be paid by the earlier of (i) December 31, 2022, or (ii) 30 days after the consummation of the sale to a third party of all or substantially all of Ivantis’ equity or assets such that the third-party controls Ivantis. The $30.0 million cash payment received during the year ended December 31, 2021 is included in litigation-related settlement as a reduction of operating expenses on the consolidated statements of operations. See Note 15, Subsequent Events for details regarding payment by Ivantis of their second $30.0 million payment to the Company.

Additionally, Ivantis will make quarterly royalty payments to the Company in the amount of 10% of Ivantis’ Hydrus Microstent U.S. sales and any international sales supplied out of the U.S. beginning in the fourth quarter of 2021 through April 26, 2025, subject to a per-unit minimum payment. The Company and Ivantis have dismissed with prejudice all of their respective claims against the other in the Lawsuit, which was scheduled for trial beginning in September 2021, and in related lawsuits in other forums and jurisdictions. The parties also have agreed to mutual licenses and covenants not to sue the other party for patent infringement relating to Ivantis’ Hydrus Microstent or the Company’s micro-stent devices.

Santen License Agreement

On May 18, 2021, the Company announced that it entered into a new development and commercialization license agreement with Santen Pharmaceutical Co., Ltd. (Santen) for the PreserFlo MicroShunt superseding the previous collaboration and distribution agreements between the two parties. Under the new agreement, the Company obtains exclusive commercialization rights for the MicroShunt in the United States, Australia, New Zealand, Canada, Brazil, Mexico and the remainder of Latin America. The new agreement also provides the Company with full control over all development activities for the MicroShunt in these same territories, including all clinical development and regulatory affairs activities in the U.S. following a transition period. Santen submitted a premarket approval (PMA) application to the U.S. Food and Drug Administration (FDA) in June 2020 and discussions with the FDA remain ongoing. The Company did not make any payment in connection with the execution of the license agreement; however, should the Company be successful in obtaining regulatory approval for the PreserFlo MicroShunt, it would be required to pay Santen a milestone payment, followed by royalties and other potential future milestones depending on the success of the commercialization of the product.

Intratus License Amendment

On April 14, 2021, the Company announced that it had entered into an amended licensing agreement with Intratus, Inc. (Intratus) under which Intratus granted the Company a global exclusive license to research, develop, manufacture and commercialize Intratus’ patented, non-invasive drug delivery platform for application in the treatment of presbyopia. The addition of presbyopia expands upon the existing agreement between the Company and Intratus announced on July 22, 2019. The amendment includes a mechanism to further expand the existing agreement to other indications, applying the active pharmaceutical ingredients being advanced by the Company in glaucoma, corneal disorders and presbyopia to new ophthalmic fields. The Company paid $5.0 million upon the signing of the Intratus License Agreement, which is included in in-process research and development within the consolidated statements of operations, as management determined there were no alternative future uses for the technology acquired.

​

Liquidity

For the year ended December 31, 2021, the Company incurred net losses of $49.6 million and cash from operations provided $24.7 million and, as of December 31, 2021, the Company had an accumulated deficit of $365.2 million. For the year ended December 31, 2020, the Company incurred a net loss of $120.3 million, and $23.0 million of cash was used by operating activities. The Company has made and expects to continue to make significant investments in our global sales force, marketing programs, research and development activities, clinical studies and general and administrative infrastructure. FDA-approved IDE and IND studies and new product development programs in our industry are expensive. The Company also expects to incur additional construction costs related to its new facility in Aliso Viejo, California.

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The Company’s 2.75% convertible notes due 2027 (Convertible Notes) may be converted at the option of the holders at the times and under the circumstances and at the conversion rate described in Note 8, Convertible Senior Notes. As of December 31, 2021, none of the conditions allowing holders of the Convertible Notes to convert had been met.

The Company plans to fund its operations, capital funding and other liquidity needs using existing cash and investments and, to the extent available, cash generated from commercial operations. The Company’s existing cash and investments include, in part, the net proceeds from the Convertible Notes issued in June 2020 (after payment for the related capped call transactions), and the $30.0 million paid to the Company by Ivantis in September 2021 pursuant to the terms of the Settlement Agreement, which the Company is using for working capital and general corporate purposes.

Although the Company has been profitable for certain periods in its operating history, there can be no assurance that it will be profitable or generate cash from operations. The Company may seek to obtain additional financing in the future through other debt or equity financings. There can be no assurance that the Company will be able to obtain additional financing on terms acceptable, or at all. As of December 31, 2021, the Company had cash, cash equivalents, restricted cash and short-term investments totaling $423.5 million and net working capital of $422.8 million. The Company has performed an analysis and concluded substantial doubt does not exist with respect to the Company being able to continue as a going concern through one year from the date of issuance of the consolidated financial statements for the year ended December 31, 2021.

​

Note 2. | Summary of Significant Accounting Policies

Basis of Presentation

The accompanying consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (GAAP).

Use of Estimates

The preparation of the consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts in the consolidated financial statements and accompanying notes. Actual results could differ materially from those estimates and assumptions. Management considers many factors in selecting appropriate financial accounting policies and controls and in developing the estimates and assumptions that are used in the preparation of these consolidated financial statements. Management must apply significant judgment in this process. In addition, other factors may affect estimates, including expected business and operational changes, sensitivity and volatility associated with the assumptions used in developing estimates, and whether historical trends are expected to be representative of future trends. The estimation process often may yield a range of reasonable estimates of the ultimate future outcomes, and management must select an amount that falls within that range of reasonable estimates. The most significant estimates in the accompanying consolidated financial statements for the year ended December 31, 2021 relate to revenue recognition, the incremental borrowing rate related to the Company’s leased assets, and stock-based compensation expense. For the years ended December 31, 2020 and December 31, 2019, in addition to the aforementioned estimates, the fair value of the liability component of the Company’s Convertible Notes and the valuation of certain intangible assets related to the Company’s Avedro Merger were significant estimates. Although these estimates are based on the Company’s knowledge of current events and actions it may undertake in the future, this process may result in actual results differing materially from those estimated amounts used in the preparation of the consolidated financial statements.

The Company’s consolidated financial statements as of and for the year ended December 31, 2021 reflect the Company’s estimates of the impact of the ongoing COVID-19 pandemic. The full extent to which the COVID-19 pandemic will directly or indirectly impact the Company’s business, results of operations and financial condition, including sales, expenses, reserves and allowances, manufacturing, clinical trials, research and development costs and employee-related amounts, will depend on future developments that are uncertain, including the duration and severity of the COVID-19 outbreak, the severity and transmission rates of new and more contagious/and or vaccine-resistant variants of COVID-19, and the actions taken to contain it or treat COVID-19, including the availability, distribution, rate

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of public acceptance and efficacy of vaccines for COVID-19, as well as the economic impact on local, regional, national and international customers and markets. As a result, there may be changes to the Company’s estimates regarding the impact of COVID-19 in future periods.

​

Segments

​

The Company has one business activity and operates as one operating segment: the development and commercialization of ophthalmic therapies designed to treat glaucoma, corneal disorders and retinal diseases. The Company determined its operating segment on the same basis that it uses to evaluate its performance internally. The Company’s chief operating decision-maker (CODM), its Chief Executive Officer, reviews its consolidated operating results for the purpose of allocating resources and evaluating financial performance.

​

Cash, Cash Equivalents, Restricted Cash and Short-term Investments

The Company invests its excess cash in marketable securities, including U.S. government agency bonds, U.S. government bonds, bank certificates of deposit, commercial paper, municipal bonds, corporate notes and asset-backed securities. For financial reporting purposes, liquid investment instruments purchased with an original maturity of three months or less are considered to be cash equivalents. Cash and cash equivalents are recorded at face value or cost, which approximates fair market value. The Company maintains cash balances in excess of amounts insured by the Federal Deposit Insurance Commission. Investments are stated at fair value as determined by quoted market prices. Investments are considered available for sale and, accordingly, unrealized gains and losses are included in accumulated other comprehensive (loss) income within stockholders’ equity.

The Company’s entire investment portfolio, except for restricted cash, is considered to be available for use in current operations and, accordingly, all such investments are stated at fair value using quoted market prices and classified as current assets, although the stated maturity of individual investments may be one year or more beyond the balance sheet date. The Company did not have any trading securities or restricted investments at December 31, 2021 or December 31, 2020.

Realized gains and losses and declines in value, if any, judged to be other-than-temporary on available for sale securities, are reported in other (expense) income, net. When securities are sold, any associated unrealized gain or loss previously reported as a separate component of stockholders’ equity is reclassified out of stockholders’ equity and recorded in the statements of operations in the period sold using the specific identification method. Accrued interest and dividends from investments are included in other (expense) income, net. The Company periodically reviews its available for sale securities for other than temporary declines in fair value below the cost basis, and whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable.

The following table provides a reconciliation of cash and cash equivalents and restricted cash reported within the consolidated balance sheets that equate to the amount reported in the consolidated statement of cash flows as of December 31, 2021, December 31, 2020 and December 31, 2019 (in thousands):

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | Year ended
​ | ​ | ​ | December 31,
​ | ​ | ​ | 2021 | ​ | ​ | 2020 | ​ | ​ | 2019 | ​
Cash and cash equivalents | ​ | $ | 100,708 | ​ | $ | 96,596 | ​ | $ | 62,430 | ​
Restricted cash | ​ | ​ | 9,416 | ​ | ​ | 9,566 | ​ | ​ | 9,326 | ​
Cash, cash equivalents and restricted cash in the consolidated statement of cash flows | ​ | $ | 110,124 | ​ | $ | 106,162 | ​ | $ | 71,756 | ​

​

Concentration of Credit Risk and Significant Customers

Financial instruments, which potentially subject the Company to significant concentration of credit risk, consist primarily of cash, cash equivalents, short-term investments and accounts receivable. The Company maintains deposits in federally insured financial institutions in excess of federally insured limits and management believes that the Company is not exposed to significant credit risk due to the financial position of the depository institutions in which those deposits are held. Additionally, the Company has established guidelines regarding investment instruments and their maturities

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which are designed to maintain preservation of principal and liquidity. The Company believes that the concentration of credit risk in its accounts receivable is mitigated by its credit evaluation process, relatively short collection terms and the level of credit worthiness of its customers. During the years ended 2021, 2020 and 2019, none of the Company’s customers accounted for more than 10% of revenues.

Accounts Receivable

The Company sells its products directly to ambulatory surgery centers, hospitals, and physician private practices, with distributors being used in certain international locations where the Company does not have a direct commercial presence and the Company is exposed to credit losses primarily through sales of its products.

​

The Company’s expected loss allowance methodology for accounts receivable is developed using historical collection experience, current and future economic and market conditions and periodic evaluation of customers’ receivables balances. Management estimates the adequacy of the allowance by using relevant available information, from internal and external sources, relating to past events, current conditions and forecasts. Historical credit loss experience provides the basis for estimation of expected credit losses and are adjusted as necessary using the relevant information available. The allowance for credit losses is measured on a collective basis when similar risk characteristic exists. The Company has identified one portfolio segment based on evaluation of the following risk characteristics: geographic regions, product lines, default rates and customer specific factors.

​

Additionally, specific allowance amounts may be established to record the appropriate provision for customers that have a higher probability of non-payment. The Company charges off uncollectible receivables against the allowance when all attempts to collect the receivable have failed. The Company’s allowance for credit losses represents management’s estimate of current expected credit losses and totaled approximately $1.4 million and $1.7 million as of December 31, 2021 and December 31, 2020, respectively, and there were immaterial bad-debt write offs charged during the years ended December 31, 2021 and December 31, 2020.

As of December 31, 2021 and December 31, 2020 the Company evaluated the current and expected future economic and market conditions surrounding the COVID-19 pandemic as it relates to collectability of its accounts receivable and determined the estimate of expected credit losses was not materially impacted. The Company will continue to re-evaluate the estimate of credit losses related to COVID-19 in conjunction with its assessment of expected credit losses in subsequent quarters.

​

Additionally, no customers accounted for more than 10% of net accounts receivable as of December 31, 2021 or December 31, 2020.

Inventory

Inventory is valued at the lower of cost and net realizable value with cost being determined by the first-in, first-out method. Management evaluates inventory for excess quantities and obsolescence and records an allowance to reduce the carrying value of inventory as determined necessary.

Property and Equipment, Net

Property and equipment is recorded at cost. Depreciation of property and equipment is generally provided using the straight-line method over the estimated useful lives of the assets, which range from three to five years. Leasehold improvements are amortized over their estimated useful life or the related lease term, whichever is shorter. Maintenance and repairs are expensed as incurred.

All long lived assets are reviewed for impairment in value when changes in circumstances dictate, based upon undiscounted future operating cash flows, and appropriate losses are recognized and reflected in current earnings to the extent the carrying amount of an asset exceeds its estimated fair value, determined by the use of appraisals, discounted cash flow analyses or comparable fair values of similar assets. The Company did not record any impairment charges for the year ended December 31, 2021 and December 31, 2020; however the Company recorded impairment charges of $0.4 million during the year ended December 31, 2019.

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Intangible Assets

Intangible assets primarily consist of developed technology, customer relationships, and IPR&D assets related to the Avedro Merger.

​

Intangible assets with finite-lives include developed technology, customer relationships and the buyout of a royalty payment obligation, which are amortized on a straight-line basis over their estimated useful lives, which range from five to eleven years. The Company reviews finite-lived intangible assets for impairment whenever events or changes in circumstances indicate that the carrying amount of the assets or asset group may not be recoverable. When such an event occurs, management determines whether there has been impairment by comparing the anticipated undiscounted future net cash flows to the related asset group’s carrying value. If the affected intangible assets are not recoverable, management estimates the fair value of the assets and would record an impairment loss if the carrying value of the assets exceeds the fair value.

​

Indefinite-lived intangible assets are comprised of IPR&D assets and are not amortized, but instead tested for impairment until the successful completion and commercialization, or abandonment, of the associated research and development efforts, at which point the IPR&D assets are either amortized over their estimated useful lives, or written-off immediately, as the case may be.

​

Refer to Note 6, Intangible Assets and Goodwill for more information on the Company’s intangible assets.

​

Goodwill

Goodwill totaled $66.1 million at December 31, 2021 and December 31, 2020. Goodwill is recorded as a result of business combinations. If the Company determines the carrying value of a reporting unit exceeds its fair value, an impairment charge would be recognized and should not exceed the total amount of goodwill allocated to that reporting unit. The Company tests for impairment annually, on October 1 and in addition to that test, regularly assesses if an event has occurred which would require interim impairment testing. The Company considered the current and expected future economic and market conditions surrounding COVID-19 pandemic and during the year did not identify an indication of goodwill impairment due that event. The Company’s annual impairment test did not result in any impairment, and the Company has not identified any indicators of impairment through December 31, 2021.

​

Refer to Note 6, Intangible Assets and Goodwill for more information on the Company’s goodwill.

​

Fair Value of Financial Instruments

The carrying amounts of cash equivalents, accounts receivable, accounts payable, and accrued liabilities are considered to be representative of their respective fair values because of the short-term nature of those instruments.

The valuation of assets and liabilities is subject to fair value measurements using a three-tiered approach and fair value measurements are classified and disclosed by the Company in one of the following three categories:

Level 1: Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities;

Level 2: Quoted prices for similar assets and liabilities in active markets, quoted prices in markets that are not active, or inputs which are observable, either directly or indirectly, for substantially the full term of the asset or liability; and

Level 3: Prices or valuation techniques that require inputs that are both significant to the fair value measurement and unobservable (i.e., supported by little or no market activity).

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Leases

The Company determines if an arrangement is a lease at inception. As a lessee, right-of-use assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent an obligation to make lease payments arising from the lease. Right-of-use assets and lease liabilities are recognized at the lease commencement date based on the present value of lease payments over the lease term. The Company estimates the incremental borrowing rate based on its debt, prevailing financial market conditions, peer company credit analyses, and management judgment. Operating lease right-of-use assets also include any lease payments made at or before lease commencement and exclude any lease incentives received. The lease terms used to calculate the right-of-use asset and related lease liability include options to extend or terminate the lease when it is reasonably certain that the Company will exercise that option. Lease expense for operating leases is recognized on a straight-line basis over the lease term as an operating expense while the expense for finance leases is recognized as amortization expense on right-of-use lease assets and interest expense using the accelerated interest method of recognition.

Revenue Recognition

The Company derives its revenue from sales of its products in the United States and internationally. Customers are primarily comprised of ambulatory surgery centers, hospitals and physician private practices, with distributors being used in certain international locations where the Company does not have a direct commercial presence.

The Company concluded that one performance obligation exists for the majority of its contracts with customers which is to deliver products in accordance with the Company’s normal delivery times. Revenue is recognized when this performance obligation is satisfied, which is the point in time when the Company considers control of a product to have transferred to the customer. Revenue recognized reflects the consideration to which the Company expects to be entitled in exchange for those products or services. The Company has determined the transaction price to be the invoice price, net of adjustments, which includes estimates of variable consideration for product returns.

The Company only recognizes revenue when it is probable that the entity will collect the consideration it is entitled to in exchange for the goods it transfers to the customer. This requires management to perform an assessment related to the probability of collecting the consideration. The assessment can contain judgment when it is performed for customers with declining credit conditions or those with no history or a limited history of product sales with the Company.

The Company offers volume-based rebate agreements to certain customers and, in these instances, the Company provides a rebate (in the form of a credit memo) at the contract’s conclusion, if earned by the customer. In such cases, the transaction price is allocated between the Company’s delivery of product and the issuance of a rebate at the contract’s conclusion for the customer to utilize on prospective purchases. The performance obligation to issue a customer’s rebate, if earned, is transferred over time and the Company’s method of measuring progress is the output method, whereby the progress is measured by the estimated rebate earned to date over the total rebate estimated to be earned over the contract period. The provision for volume-based rebates is estimated based on customers' contracted rebate programs and the customers’ projected sales levels. The Company periodically monitors its customer rebate programs to ensure the rebate allowance is fairly stated. The Company’s rebate allowance is included in accrued liabilities in the consolidated balance sheets and estimated rebates accrued were not material during the periods presented.

​

Additionally, the Company has a performance obligation related to certain customers’ right to a future discount on single dose pharmaceutical purchases in the U.S., and that performance obligation is expected to be recognized when the customer elects to utilize the discount, which is generally within one year. Additionally, the Company has a performance obligation related to its extended warranty agreements with customers related to its KXL systems.

​

Customers are not granted specific rights of return; however, the Company may permit returns of certain products from customers if such product is returned in a timely manner and in good condition. The Company generally provides a warranty on its products for one year from the date of shipment, and offers an extended warranty for its KXL

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systems. Any product found to be defective or out of specification will be replaced or serviced at no charge during the warranty period. Estimated allowances for sales returns and warranty replacements are recorded at the time of sale of the product and are estimated based upon the historical patterns of product returns matched against sales, and an evaluation of specific factors that may increase the risk of product returns. Product returns and warranty replacements to date have been consistent with amounts reserved or accrued and have not been significant. If actual results in the future vary from the Company’s estimates, the Company will adjust these estimates which would affect net product revenue and earnings in the period such variances become known.

​

Convertible Senior Notes

See Recently Adopted Accounting Pronouncements below for the Company’s accounting for its Convertible Senior Notes.

​

Shipping and Handling Costs

All shipping and handling costs are expensed as incurred and are charged to general and administrative expense. Charges to customers for shipping and handling are credited to general and administrative expense.

Advertising Costs

All advertising costs are expensed as incurred. Advertising costs incurred during the years ended December 31, 2021, December 31, 2020 and December 31, 2019 were approximately $1.2 million, $1.6 million and $2.5 million, respectively.

Income Taxes

Income taxes are accounted for using an asset and liability approach that requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of temporary differences between the financial reporting basis and the tax basis of the Company’s assets and liabilities at the applicable tax rates, along with NOL and tax credit carryovers. The Company records a valuation allowance against a portion of deferred tax assets to reduce the net carrying value to an amount that it believes is more likely than not to be realized. Management has considered estimated taxable income and ongoing prudent and feasible tax planning strategies in assessing the amount of the valuation allowance. Based upon the weight of available evidence, which includes the Company’s historical operating performance and limited potential to utilize tax credit carryforwards, the Company has determined that a portion of its deferred tax assets should be offset by a valuation allowance. When the Company establishes or reduces the valuation allowance against its deferred tax assets, its provision for income taxes increases or decreases, respectively, in the period such determination is made.

The Company is required to file federal and state income tax returns in the United States and various other state jurisdictions. The Company also files income tax returns in the foreign countries in which its subsidiaries operate. The preparation of these income tax returns requires the Company to interpret the applicable tax laws and regulations in effect in such jurisdictions, which could affect the amount of tax paid.

Additionally, the Company follows an accounting standard addressing the accounting for uncertainty in income taxes that prescribes rules for recognition, measurement, and classification in the consolidated financial statements of tax positions taken or expected to be taken in a tax return.

Research and Development Expenses

Major components of research and development expense include personnel costs, preclinical studies, clinical trials and related clinical product manufacturing, materials and supplies, and fees paid to consultants. Research and development costs are expensed as goods are received or services are rendered. Costs to acquire technologies to be used in research and development that have not reached technological feasibility and have no alternative future use are also expensed as incurred.

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At each financial reporting date, the Company accrues the estimated unpaid costs of clinical study activities performed during a period by third party clinical sites with whom the Company has agreements that provide for fees based upon the quantities of subjects enrolled and clinical evaluation visits that occur over the life of the study. The cost estimates are determined based upon a review of the agreements and data collected by internal and external clinical personnel as to the status of enrollment and subject visits, and are based upon the facts and circumstances known to the Company at each financial reporting date. If the actual performance of activities varies from the assumptions used in the cost estimates, the accruals are adjusted accordingly. There have been no material adjustments to the Company’s prior period accrued estimates for clinical trial activities through December 31, 2021.

Stock-Based Compensation

The Company recognizes compensation expense for all stock-based awards granted to employees and nonemployees, including members of its board of directors.

The fair value of stock option awards is estimated at the grant date using the Black-Scholes option pricing model, and the portion that is ultimately expected to vest is recognized as compensation cost over the requisite service period using the straight-line method. The determination of the fair value-based measurement of stock options on the date of grant using an option pricing model is affected by the determination of the fair value of the underlying stock as well as assumptions regarding a number of highly complex and subjective variables. These variables include, but are not limited to, the Company’s stock price volatility over the expected term of the grants, and actual and projected stock option exercise behaviors. In the future, as additional empirical evidence regarding these estimates becomes available, the Company may change or refine its approach of deriving them, and these changes could impact the fair value-based measurement of stock options granted in the future. Changes in the fair value-based measurement of stock awards could materially impact the Company’s operating results.

The fair value of restricted stock unit (RSU) awards made to employees and nonemployees is equal to the closing market price of the Company’s common stock on the grant date.

Software Costs

The Company capitalizes certain costs when it is determined that it is probable that the project will be completed, the software will be used to perform the function intended, and the preliminary project stage is completed. These capitalized costs are included in property and equipment, net within the consolidated balance sheets.

Comprehensive (Loss) Income

All components of comprehensive (loss) income, including net (loss) income, are reported in the consolidated financial statements in the period in which they are recognized. Comprehensive (loss) income is defined as the change in equity during a period from transactions and other events and circumstances from non-owner sources, including unrealized gains and losses on marketable securities and foreign currency translation adjustments.

Net (Loss) Income per Share

Basic net (loss) income per share is calculated by dividing the net (loss) income by the weighted average number of common shares that were outstanding for the period, without consideration for common stock equivalents.

For periods when the Company realizes a net loss, no common stock equivalents are included in the calculation of weighted average number of dilutive common stock equivalents as the effect of applying the treasury stock method is considered anti-dilutive.

For periods when the Company realizes net income, diluted net income per share is calculated by dividing the net income by the weighted average number of common shares plus the sum of the weighted average number of dilutive common stock equivalents outstanding for the period determined using the treasury stock method. Common stock equivalents are comprised of stock options, outstanding and unvested RSUs under the Company’s incentive compensation plans and shares issuable under the Company’s Employee Stock Purchase Plan (ESPP) and, beginning January 1, 2021, shares convertible pursuant to the Convertible Notes.

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The Company’s computation of net (loss) income per share is as follows (in thousands, except per share amounts):

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | As of | ​
​ | ​ | ​ | ​ | ​ | December 31, | ​
​ | ​ | ​ | 2021 | ​ | ​ | 2020 | ​ | ​ | 2019 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Numerator: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net income (loss) - basic | ​ | $ | (49,593) | ​ | $ | (120,348) | ​ | $ | 15,424 | ​
Denominator: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Weighted average number of common shares outstanding - basic | ​ | ​ | 46,423 | ​ | ​ | 44,497 | ​ | ​ | 37,355 | ​
Common stock equivalents from outstanding common stock options | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 3,495 | ​
Common stock equivalents for ESPP | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 25 | ​
Common stock equivalents from unvested restricted stock units | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 270 | ​
Weighted average number of common shares outstanding - diluted | ​ | ​ | 46,423 | ​ | ​ | 44,497 | ​ | ​ | 41,145 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Basic net (loss) income per share | ​ | $ | (1.07) | ​ | $ | (2.70) | ​ | $ | 0.41 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Diluted net (loss) income per share | ​ | $ | (1.07) | ​ | $ | (2.70) | ​ | $ | 0.37 | ​

​

Potentially dilutive securities not included in the calculation of diluted net (loss) income per share because to do so would be anti-dilutive were as follows (weighted outstanding common stock equivalent shares, in thousands):

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | As of |
​ | ​ | ​ | December 31, |
​ | ​ | ​ | 2021 | ​ | ​ | 2020 | ​ | ​ | 2019 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Convertible senior notes | ​ | ​ | 5,125 | ​ | ​ | — | ​ | ​ | — | ​
Stock options outstanding |  | ​ | 2,951 |  | ​ | 4,399 |  | ​ | 3,616 | ​
Unvested restricted stock units | ​ | ​ | 740 | ​ | ​ | 526 | ​ | ​ | 365 | ​
Employee stock purchase plan | ​ | ​ | 11 |  | ​ | 15 |  | ​ | 26 | ​
​ | ​ | ​ | 8,827 |  | ​ | 4,940 |  | ​ | 4,007 | ​

​

​

Recently Adopted Accounting Pronouncements

In August 2020, the Financial Accounting Standards Board (FASB) issued ASU 2020-06, which simplifies accounting for convertible instruments. The embedded conversion features are no longer separated from the host contract for convertible instruments with conversion features that are not required to be accounted for as derivatives under ASU 2020-06, or that do not result in substantial premiums accounted for as paid-in capital. Consequently, a convertible debt instrument will be accounted for as a single liability measured at its amortized cost, as long as no other features require bifurcation and recognition as derivatives. The new guidance also requires the if-converted method to compute diluted earnings per share to be applied for all convertible instruments. ASU 2020-06 is effective for fiscal years beginning after December 15, 2021, with early adoption permitted. Adoption of the standard requires using either a modified retrospective or a full retrospective approach. Effective January 1, 2021, the Company early adopted ASU 2020-06 using the modified retrospective adoption approach. The cumulative effect of the change was recognized as an adjustment to the opening balance of retained earnings at the date of adoption. The comparative prior year information has not been restated and continues to be presented according to accounting standards in effect for those periods.

​

The adoption of ASU 2020-06 resulted in an increase to accumulated deficit of $5.5 million, a decrease to additional paid-in capital of $81.6 million, a decrease in the deferred tax liability of $2.2 million and an increase to convertible notes, net of $89.2 million. Interest expense recognized in future periods will be reduced as a result of accounting for the convertible debt instrument as a single liability measured at its amortized cost. Lastly, the Company derecognized deferred income taxes associated with the Convertible Notes and adjusted the deferred tax liability

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associated with the embedded conversion feature and corresponding change in the valuation allowance.

​

Recently Issued Accounting Pronouncements Not Yet Adopted

The Company reviewed recently issued accounting pronouncements and concluded that they were either not applicable or not expected to have a significant impact to the consolidated financial statements.

​

Note 3. Balance Sheet Details

Short-term Investments

Short-term investments consisted of the following (in thousands):

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ |  | At December 31, 2021 |
​ | ​ | ​ | Maturity | ​ | Amortized cost | ​ | Unrealized | ​ | Unrealized | ​ | Estimated |
​ |  | ​ | (in years) |  | or cost |  | gains |  | losses |  | fair value |
U.S. government agency bonds | ​ | ​ | less than 3 | ​ | $ | 123,803 | ​ | $ | 8 | ​ | $ | (540) | ​ | $ | 123,271 | ​
U.S. government bonds | ​ | ​ | less than 2 | ​ | ​ | 76,765 | ​ | ​ | — | ​ | ​ | (240) | ​ | ​ | 76,525 | ​
Bank certificates of deposit | ​ | ​ | less than 1 | ​ | ​ | 12,500 | ​ | ​ | 1 | ​ | ​ | (9) | ​ | ​ | 12,492 | ​
Commercial paper | ​ | ​ | less than 1 | ​ |  | 2,998 | ​ |  | — | ​ |  | (1) | ​ |  | 2,997 | ​
Corporate notes | ​ | ​ | less than 3 | ​ |  | 55,178 | ​ |  | 37 | ​ |  | (183) | ​ |  | 55,032 | ​
Asset-backed securities | ​ | ​ | less than 2 | ​ |  | 23,761 | ​ |  | 44 | ​ |  | (31) | ​ |  | 23,774 | ​
Municipal bonds | ​ | ​ | less than 3 | ​ | ​ | 19,350 | ​ | ​ | — | ​ | ​ | (98) | ​ | ​ | 19,252 | ​
Total | ​ | ​ | ​ | ​ | $ | 314,355 | ​ | $ | 90 | ​ | $ | (1,102) | ​ | $ | 313,343 | ​

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ |  | At December 31, 2020 |
​ | ​ | ​ | Maturity | ​ | Amortized cost | ​ | Unrealized | ​ | Unrealized | ​ | Estimated |
​ |  | ​ | (in years) |  | or cost |  | gains |  | losses |  | fair value |
U.S. government agency bonds | ​ | ​ | less than 3 | ​ | $ | 206,704 | ​ | $ | 223 | ​ | $ | (3) | ​ | $ | 206,924 | ​
Bank certificates of deposit | ​ | ​ | less than 1 | ​ | ​ | 20,700 | ​ | ​ | 8 | ​ | ​ | — | ​ | ​ | 20,708 | ​
Commercial paper | ​ | ​ | less than 1 | ​ |  | 1,500 | ​ |  | — | ​ |  | — | ​ | ​ | 1,500 | ​
Corporate notes | ​ | ​ | less than 3 | ​ |  | 54,866 | ​ |  | 308 | ​ |  | (1) | ​ | ​ | 55,173 | ​
Asset-backed securities | ​ | ​ | less than 2 | ​ |  | 13,290 | ​ |  | 205 | ​ |  | — | ​ |  | 13,495 | ​
Municipal bonds | ​ | ​ | less than 3 | ​ | ​ | 9,954 | ​ | ​ | 21 | ​ | ​ | (3) | ​ | ​ | 9,972 | ​
Total | ​ | ​ | ​ | ​ | $ | 307,014 | ​ | $ | 765 | ​ | $ | (7) | ​ | $ | 307,772 | ​

​

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Accounts Receivable, Net

Accounts receivable consisted of the following (in thousands):

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, |
​ | ​ | 2021 |  | 2020 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Accounts receivable |  | $ | 34,805 | ​ | $ | 37,729 | ​
Allowance for credit losses | ​ |  | (1,367) | ​ |  | (1,670) | ​
​ |  | $ | 33,438 | ​ | $ | 36,059 | ​

​

Inventory

Inventory consisted of the following (in thousands):

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, |
​ | ​ | 2021 |  | 2020 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Finished goods |  | $ | 6,495 | ​ | $ | 5,346 | ​
Work in process | ​ | ​ | 7,010 | ​ |  | 3,584 | ​
Raw material | ​ | ​ | 9,506 | ​ |  | 6,879 | ​
​ |  | $ | 23,011 | ​ | $ | 15,809 | ​

​

Property and Equipment, Net

Property and equipment consisted of the following (in thousands):

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​
​ | ​ | 2021 | ​ | 2020 | ​
​ | ​ | ​ | ​ |  | ​ | ​ | ​
Buildings |  | $ | 874 | ​ | $ | 874 | ​
Equipment | ​ | ​ | 19,280 | ​ | ​ | 15,737 | ​
Furniture and fixtures | ​ | ​ | 1,706 | ​ |  | 1,820 | ​
Leasehold improvements | ​ | ​ | 6,152 | ​ |  | 5,851 | ​
Computer equipment and software | ​ | ​ | 3,333 | ​ | ​ | 2,754 | ​
Land | ​ | ​ | 7,068 | ​ | ​ | 7,068 | ​
Construction in progress | ​ | ​ | 51,208 | ​ |  | 5,825 | ​
​ | ​ | ​ | 89,621 | ​ |  | 39,929 | ​
Less accumulated depreciation and amortization | ​ |  | (20,652) | ​ |  | (15,921) | ​
​ |  | $ | 68,969 | ​ | $ | 24,008 | ​

​

Depreciation and amortization expense related to property and equipment was $4.8 million, $6.1 million and $3.7 million for the years ended December 31, 2021, December 31, 2020 and December 31, 2019, respectively.

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Accrued Liabilities

Accrued liabilities consisted of the following (in thousands):

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, |
​ | ​ | 2021 | ​ | 2020 |
​ | ​ | ​ | ​ |  | ​ | ​ | ​
Accrued bonuses |  | $ | 17,015 | ​ | $ | 10,815 | ​
Accrued vacation benefits | ​ | ​ | 4,196 | ​ |  | 3,728 | ​
Other accrued liabilities | ​ | ​ | 34,816 | ​ |  | 30,788 | ​
​ | ​ | $ | 56,027 | ​ | $ | 45,331 | ​

​

​

Note 4. | Fair Value Measurements

Fair value is an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability.

The carrying amounts of cash equivalents, accounts receivable, accounts payable, and accrued liabilities are considered to be representative of their respective fair values because of the short-term nature of those instruments.

The valuation of assets and liabilities is subject to fair value measurements using a three-tiered approach and fair value measurements are classified and disclosed by the Company in one of the following three categories:

Level 1: Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities;

Level 2: Quoted prices for similar assets and liabilities in active markets, quoted prices in markets that are not active, or inputs which are observable, either directly or indirectly, for substantially the full term of the asset or liability; and

Level 3: Prices or valuation techniques that require inputs that are both significant to the fair value measurement and unobservable (i.e., supported by little or no market activity).

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The following tables present information about the Company’s financial assets and liabilities measured at fair value on a recurring basis as of December 31, 2021 and December 31, 2020, and indicate the fair value hierarchy of the valuation techniques utilized by the Company to determine such fair value (in thousands).

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | At December 31, 2021 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Significant | ​ | ​ | ​ |
​ | ​ | ​ | ​ | ​ | Quoted prices in | ​ | other | ​ | Significant |
​ | ​ | ​ | ​ | ​ | active markets for | ​ | observable | ​ | unobservable |
​ | ​ | December 31, | ​ | identical assets | ​ | inputs | ​ | inputs |
​ | ​ | 2021 | ​ | (Level 1) | ​ | (Level 2) | ​ | (Level 3) |
Assets |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  | ​
Cash equivalents: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Money market funds (i) | ​ | $ | 4,212 | ​ | $ | 4,212 | ​ | $ | — | ​ | $ | — | ​
Available for sale securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. government agency bonds (ii) | ​ | ​ | 123,271 | ​ | ​ | — | ​ | ​ | 123,271 | ​ | ​ | — | ​
U.S. government bonds (ii) | ​ | ​ | 76,525 | ​ | ​ | — | ​ | ​ | 76,525 | ​ | ​ | — | ​
Bank certificates of deposit (ii) | ​ | ​ | 12,492 | ​ | ​ | — | ​ | ​ | 12,492 | ​ | ​ | — | ​
Commercial paper (ii) | ​ | ​ | 2,997 | ​ | ​ | — | ​ | ​ | 2,997 | ​ | ​ | — | ​
Corporate notes (ii) | ​ | ​ | 55,032 | ​ | ​ | — | ​ | ​ | 55,032 | ​ | ​ | — | ​
Asset-backed securities (ii) | ​ | ​ | 23,774 | ​ | ​ | — | ​ | ​ | 23,774 | ​ | ​ | — | ​
Municipal bonds (ii) | ​ | ​ | 19,252 | ​ | ​ | — | ​ | ​ | 19,252 | ​ | ​ | — | ​
Investments held for deferred compensation plans | ​ | ​ | 7,412 | ​ | ​ | — | ​ | ​ | 7,412 | ​ | ​ | — | ​
Total Assets | ​ | $ | 324,967 | ​ | $ | 4,212 | ​ | $ | 320,755 | ​ | $ | — | ​
Liabilities | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Deferred compensation plans | ​ | $ | 7,302 | ​ | ​ | — | ​ | ​ | 7,302 | ​ | ​ | — | ​
Total Liabilities | ​ | $ | 7,302 | ​ | $ | — | ​ | $ | 7,302 | ​ | $ | — | ​

(i) | Included in cash and cash equivalents with a maturity of three months or less from date of purchase on the consolidated balance sheets.

(ii) | Included in short-term investments on the consolidated balance sheets.

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | At December 31, 2020 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Significant | ​ | ​ | ​ |
​ | ​ | ​ | ​ | ​ | Quoted prices in | ​ | other | ​ | Significant |
​ | ​ | ​ | ​ | ​ | active markets for | ​ | observable | ​ | unobservable |
​ | ​ | December 31, | ​ | identical assets | ​ | inputs | ​ | inputs |
​ | ​ | 2020 | ​ | (Level 1) | ​ | (Level 2) | ​ | (Level 3) |
Assets |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  | ​
Cash equivalents: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Money market funds (i) | ​ | $ | 5,169 | ​ | $ | 5,169 | ​ | $ | — | ​ | $ | — | ​
Available for sale securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. government agency bonds (ii) | ​ | ​ | 206,924 | ​ | ​ | — | ​ | ​ | 206,924 | ​ | ​ | — | ​
Bank certificates of deposit (ii)(iii) | ​ | ​ | 25,708 | ​ | ​ | — | ​ | ​ | 25,708 | ​ | ​ | — | ​
Commercial paper (ii) | ​ | ​ | 1,500 | ​ | ​ | — | ​ | ​ | 1,500 | ​ | ​ | — | ​
Corporate notes (ii) | ​ | ​ | 55,173 | ​ | ​ | — | ​ | ​ | 55,173 | ​ | ​ | — | ​
Asset-backed securities (ii) | ​ | ​ | 13,495 | ​ | ​ | — | ​ | ​ | 13,495 | ​ | ​ | — | ​
Municipal bonds (ii) | ​ | ​ | 9,972 | ​ | ​ | ​ | ​ | ​ | 9,972 | ​ | ​ | ​ | ​
Investments held for deferred compensation plans | ​ | ​ | 5,331 | ​ | ​ | — | ​ | ​ | 5,331 | ​ | ​ | — | ​
Total Assets | ​ | $ | 323,273 | ​ | $ | 5,169 | ​ | $ | 318,104 | ​ | $ | — | ​
Liabilities | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Deferred compensation plans | ​ | ​ | 5,232 | ​ | ​ | — | ​ | ​ | 5,232 | ​ | ​ | — | ​
Total Liabilities | ​ | $ | 5,232 | ​ | $ | — | ​ | $ | 5,232 | ​ | $ | — | ​

(i) | Included in cash and cash equivalents with a maturity of three months or less from date of purchase on the consolidated balance sheets.

(ii) | Included in short-term investments on the consolidated balance sheets.

(iii) | One bank certificate of deposit totaling $5,000 (in thousands) is included in cash and cash equivalents on the consolidated balance sheets, as the investment has a maturity of three months or less from the date of purchase on the consolidated balance sheets.

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Money market funds and currency are highly liquid investments and are actively traded. The pricing information on these investment instruments is readily available and can be independently validated as of the measurement date. This approach results in the classification of these securities as Level 1 of the fair value hierarchy.

U.S. government agency bonds, U.S. government bonds, bank certificates of deposit, commercial paper, municipal bonds, corporate notes and asset-backed securities are measured at fair value using Level 2 inputs. The Company reviews trading activity and pricing for these investments as of each measurement date. Pursuant to the Company’s deferred compensation plan (the Deferred Compensation Plan), the Company has also established a rabbi trust that serves as an investment to shadow the Deferred Compensation Plan liability. The investments of the rabbi trust and Deferred Compensation Plan liability consist of company-owned life insurance policies (COLIs) and the pricing on these investments can be independently evaluated. When sufficient quoted pricing for identical securities is not available, the Company uses market pricing and other observable market inputs for similar securities obtained from third party data providers. These inputs represent quoted prices for similar assets in active markets or these inputs have been derived from observable market data. This approach results in the classification of these securities as Level 2 of the fair value hierarchy.

There were no transfers between levels within the fair value hierarchy during the periods presented.

The Company did not have any assets or liabilities measured at fair value on a recurring basis within Level 3 fair value measurements as of December 31, 2021 and December 31, 2020.

Convertible Senior Notes

As of December 31, 2021 and December 31, 2020, the fair value of the Convertible Notes was $341.8 million and $442.2 million, respectively. The fair value was determined on the basis of the market prices observable for similar instruments and is considered Level 2 in the fair value hierarchy. See Note 8, Convertible Senior Notes for additional information.

​

Note 5. | Leases

The Company has operating and finance leases for facilities and certain equipment. Leases with an initial term of 12 months or less are not recorded on the consolidated balance sheet. Lease expense for operating leases is recognized on a straight-line basis over the lease term. For lease agreements entered into or reassessed after the adoption of Accounting Standards Codification 842, the Company combines lease and non-lease components. See Note 2, Summary of Significant Accounting Policies for additional information.

The Company's leases have remaining non-cancelable lease terms of approximately one year to thirteen years, some of which include options to extend the leases for up to ten years, and some of which include options to terminate the lease within one year. The exercise of lease renewal options is at the Company's sole discretion. In certain of the Company’s lease agreements, the rental payments are adjusted periodically to reflect actual charges incurred for common area maintenance, landlord incentives and/or inflation.

On November 14, 2018, the Company entered into an office building lease pursuant to which the Company leases one property containing three existing office buildings, comprising approximately 160,000 rentable square feet of space, located in Aliso Viejo, California (Aliso Facility) which was accounted for as a finance lease. The term of the Aliso Facility commenced on April 1, 2019 for expense recognition purposes and continues for thirteen years. The agreement contains an option to extend the lease for two additional five year periods at market rates. Beginning in January 2022, the Company began relocating certain of its corporate administrative headquarters, along with certain laboratory, research and development and warehouse space, to the Aliso Facility. The lease landlord agreed to provide the Company with a tenant improvement allowance in the amount of the cost of any leasehold improvements, not to exceed approximately $12.7 million upon the Company providing the necessary documentation evidencing the costs of the allowable leasehold improvements. All of the aforementioned tenant improvement allowances were utilized by the end of the quarter ended June 30, 2021 and during and as of the year ended December 31, 2021 the Company received $12.7 million in reimbursements.

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The Company also leases two adjacent facilities located in San Clemente, California and a facility in Burlington, Massachusetts. The total leased square footage of the San Clemente facilities equals approximately 98,000. On July 2, 2020, the Company extended the term of the San Clemente facilities by five years, both of which now expire on May 31, 2030. Each San Clemente facility lease contains an option to extend the lease for one additional five-year period at market rates. The total leased square footage of the Burlington facility is approximately 60,000 square feet, and the lease expires on July 31, 2033. The Burlington facility lease contains an option to extend the lease for one additional five-year period at market rates.

​

The Company currently intends to maintain its manufacturing facilities at its San Clemente and Burlington locations for the foreseeable future. The Company leases approximately 27,000 square feet of office and laboratory space in Waltham, Massachusetts, pursuant to a lease agreement that expires in 2023.

​

The Company’s remaining U.S.-based and foreign subsidiaries’ leased office space totals less than 14,000 square feet.

The following table presents the lease balances within the consolidated balance sheets:

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Leases |  | ​ |  | December 31, |  | December 31,
(in thousands) | ​ | Classification | ​ | 2021 | ​ | 2020
Assets | ​ |  | ​ | ​ |  | ​ | ​ |
Operating | ​ | Operating lease right-of-use asset | ​ | $ | 28,142 | ​ | $ | 20,009
Finance | ​ | Finance lease right-of-use asset | ​ | ​ | 49,022 | ​ | ​ | 51,443
Total lease assets | ​ | ​ | ​ | $ | 77,164 | ​ | $ | 71,452
Liabilities | ​ |  | ​ | ​ |  | ​ | ​ |
Current | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Operating | ​ | Accrued liabilities | ​ | $ | 1,010 | ​ | $ | 1,185
Noncurrent | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Operating | ​ | Operating lease liability | ​ | ​ | 29,650 | ​ | ​ | 20,704
Finance | ​ | Finance lease liability | ​ | ​ | 72,699 | ​ | ​ | 60,690
Total lease liabilities | ​ |  | ​ | $ | 103,359 | ​ | $ | 82,579

​

Note: As the implicit rates in the Company’s leases are not readily available, the incremental borrowing rate was determined based on the information available at commencement date in determining the present value of lease payments.

​

For the year ended December 31, 2021 and December 31, 2020, the components of operating and finance lease expenses were as follows:

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | Year Ended | ​ | Year Ended | ​
Lease Cost | ​ | ​ | December 31, | ​ | December 31, | ​
(in thousands) | ​ | Classification | 2021 | ​ | 2020 | ​
Fixed operating lease cost | ​ | Cost of sales | $ | 1,340 | ​ | $ | 757 | ​
​ | ​ | Research and development | ​ | 1,030 | ​ | ​ | 950 | ​
​ | ​ | Selling, general and administrative expenses | ​ | 2,049 | (a) | ​ | 2,132 | (a)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Finance lease cost | ​ | Amortization of right-of-use asset included in Selling, general and administrative expenses | $ | 2,421 | ​ | $ | 2,424 | ​
Finance lease cost | ​ | Interest expense on lease liability | $ | 4,074 | ​ | $ | 3,596 | ​

(a)Includes short-term leases, which are immaterial.

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The following table presents the maturity of the Company’s operating and finance lease liabilities as of December 31, 2021:

​

​ | ​ | ​ | ​ | ​ | ​ | ​
Maturity of Lease Liabilities | ​ | Operating | ​ | Finance
(in thousands) |  | Leases (a) |  | Leases (b)
2022 | ​ | $ | 3,367 | ​ | $ | —
2023 | ​ | ​ | 3,510 | ​ | ​ | 9,920
2024 | ​ | ​ | 3,290 | ​ | ​ | 5,184
2025 | ​ | ​ | 3,274 | ​ | ​ | 5,340
2026 | ​ | ​ | 3,359 | ​ | ​ | 5,500
Thereafter | ​ | ​ | 36,760 | ​ | ​ | 107,533
Total lease payments | ​ | $ | 53,560 | ​ | $ | 133,477
Less: imputed interest | ​ | ​ | 22,900 | ​ | ​ | 60,778
Total lease liabilities | ​ | $ | 30,660 | ​ | $ | 72,699

(a) | Operating lease payments include $20.8 million related to options to extend lease terms that are reasonably certain of being exercised.

(b) | Finance lease payments include $75.8 million related to options to extend lease terms that are reasonably certain of being exercised.

​

The weighted-average remaining lease term and weighted-average discount rate related to the Company’s operating and finance leases as of December 31, 2021 and December 31, 2020 were:

​

​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​ | ​ | December 31, | ​
Lease Term and Discount Rate |  | 2021 | ​ |  | 2020 | ​
Weighted-average remaining lease term (years) | ​ |  | ​ | ​ | ​ | ​
Operating leases | ​ | 13.6 | ​ | ​ | 12.2 | ​
Finance leases | ​ | 20.3 | ​ | ​ | 21.3 | ​
Weighted-average discount rate | ​ | ​ | ​ | ​ | ​ | ​
Operating leases | ​ | 7.9 | % | ​ | 7.7 | %
Finance leases | ​ | 6.0 | % | ​ | 6.0 | %

​

Supplemental cash flow information related to the Company’s operating and finance leases was as follows:

​

​ | ​ | ​ | ​ | ​ | ​
​ | Year Ended | ​ | Year Ended
Other Information | December 31, | ​ | December 31,
(in thousands) | 2021 | ​ | 2020
Cash paid for amounts included in the measurement of lease liabilities: | ​ | ​ | ​ | ​ | ​
Operating cash flows from operating leases | $ | 3,761 | ​ | $ | 2,859
Right-of-use asset obtained in exchange for lease obligations: | ​ | ​ | ​ | ​ | ​
Operating lease | $ | 10,496 | ​ | $ | 6,916
Finance lease | ​ | — | ​ | ​ | 181
Interest paid for finance lease | ​ | 4,074 | ​ | ​ | 1,160

​

​

Note 6. | Intangible Assets and Goodwill

Intangible assets

As part of the Avedro Merger on November 21, 2019, the Company acquired identifiable intangible assets for (i) developed technology related to Photrexa, a bio-activated pharmaceutical therapy for the corneal cross-linking treatment of keratoconus, which is being amortized to cost of sales over a weighted-average estimated useful life of approximately 11 years, and (ii) customer relationships, which will be amortized to selling, general and administrative expense over an estimated useful life of five years. The Company also acquired in-process research and development (IPR&D) related to other applications of Avedro’s corneal remodeling platform, which will not be amortized until technological feasibility is met, but will be assessed for impairment annually, or more frequently if indicators of impairment become present.

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For the years ended December 31, 2021 and December 31, 2020, amortization expense related to the above finite-lived intangible assets was approximately $22.1 million and $2.8 million, recorded in cost of sales and selling, general and administrative expenses, respectively, in the consolidated statement of operations. For the year ended December 31, 2019, amortization expense related to the above finite-lived intangible assets was approximately $2.3 million and $0.3 million, recorded in cost of sales and selling, general and administrative expenses, respectively in the consolidated statement of operations.

The Company evaluated its indefinite-lived intangible assets for impairment, including any considerations specific to the COVID-19 pandemic, utilizing the methodology pursuant to the adoption of ASU 2017-04 and concluded these intangible assets were not impaired as of December 31, 2021.

Goodwill

The assessment of goodwill by reporting unit is performed annually, in the fourth quarter, or more frequently if events or circumstances indicate the carrying value may no longer be recoverable and that an impairment loss may have occurred. The Company concluded there was no goodwill impairment as of December 31, 2021, and during this annual assessment the Company considered the current and expected future economic and market conditions surrounding the COVID-19 pandemic and its impact on the Company’s reporting unit.

The following table presents the composition of intangible assets and goodwill (in thousands):

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Estimated | ​ | As of December 31, 2021 | ​ | As of December 31, 2020
​ | ​ | Useful | ​ | Gross | ​ | ​ | ​ | ​ | ​ | Gross | ​ | ​ | ​ | ​
​ | ​ | Life | ​ | Carrying | ​ | Accumulated | ​ | Net | ​ | Carrying | ​ | Accumulated | ​ | Net
​ |  | (in years) |  | Amount |  | Amortization |  | Amount |  | Amount |  | Amortization |  | Amount
Developed technology | ​ | 11.4 | ​ | $ | 252,200 | ​ | $ | (46,485) | ​ | $ | 205,715 | ​ | $ | 252,200 | ​ | $ | (24,393) | ​ | $ | 227,807
Customer relationships | ​ | 5.0 | ​ | ​ | 14,100 | ​ | ​ | (5,934) | ​ | ​ | 8,166 | ​ | ​ | 14,100 | ​ | ​ | (3,114) | ​ | ​ | 10,986
Intangible assets subject to amortization | ​ | ​ | ​ | ​ | 266,300 | ​ | ​ | (52,419) | ​ | ​ | 213,881 | ​ | ​ | 266,300 | ​ | ​ | (27,507) | ​ | ​ | 238,793
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
In-process research and development | ​ | Indefinite | ​ | $ | 118,900 | ​ | ​ | — | ​ | ​ | 118,900 | ​ | ​ | 118,900 | ​ | ​ | — | ​ | ​ | 118,900
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total | ​ | ​ | ​ | $ | 385,200 | ​ | $ | (52,419) | ​ | $ | 332,781 | ​ | $ | 385,200 | ​ | $ | (27,507) | ​ | $ | 357,693
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Goodwill | ​ | Indefinite | ​ | $ | 66,134 | ​ | ​ | — | ​ | ​ | 66,134 | ​ | ​ | 66,134 | ​ | ​ | — | ​ | ​ | 66,134

​

As of December 31, 2021, expected amortization expense for unamortized finite-lived intangible assets for the next five years and thereafter is as follows (in thousands):

​

​ | ​ | ​ | ​
​ |  | Amortization Expense
2022 | ​ | $ | 24,912
2023 | ​ | ​ | 24,912
2024 | ​ | ​ | 24,619
2025 | ​ | ​ | 22,092
2026 | ​ | ​ | 22,092
Thereafter | ​ | ​ | 95,254
Total amortization | ​ | $ | 213,881

​

Actual amortization expense to be reported in future periods could differ from these estimates as a result of asset impairments, acquisitions, or other facts and circumstances.

​

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Note 7. Revenue from Contracts with Customers

The Company’s net sales are generated primarily from sales of iStent products to customers and sales of Photrexa and associated drug formulations as well as KXL systems. Customers are primarily comprised of ambulatory surgery centers, hospitals and physician private practices, with distributors being used in certain international locations where the Company currently does not have a direct commercial presence.

Revenue is recognized in an amount that reflects the consideration the Company expects to be entitled to in exchange for goods or services. Substantially all of the Company’s net sales for the year ended December 31, 2021 as previously discussed in Note 1, Organization and Basis of Presentation, all of the Company’s net sales are considered revenue from contracts with customers.

Disaggregation of Revenue

The Company’s revenues disaggregated by product category and geography, for the years ended December 31, 2021, December 31, 2020 and December 31, 2019 was as follows (in thousands):

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended
​ | ​ | December 31,
​ | ​ | United States | ​ | International | ​ | Total
​ |  | 2021 |  | 2020 |  | 2019 |  | 2021 |  | 2020 |  | 2019 |  | 2021 |  | 2020 |  | 2019
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Glaucoma | ​ | $ | 170,796 | ​ | $ | 133,719 | ​ | $ | 187,650 | ​ | $ | 61,181 | ​ | $ | 45,644 | ​ | $ | 43,317 | ​ | $ | 231,977 | ​ | $ | 179,363 | ​ | $ | 230,967
Corneal Health | ​ | ​ | 52,995 | ​ |  | 39,367 | ​ |  | 4,806 | ​ | ​ | 9,039 | ​ |  | 6,229 | ​ |  | 1,211 | ​ | ​ | 62,034 | ​ |  | 45,596 | ​ |  | 6,017
Total |  | $ | 223,791 | ​ | $ | 173,086 | ​ | $ | 192,456 | ​ | $ | 70,220 | ​ | $ | 51,873 | ​ | $ | 44,528 | ​ | $ | 294,011 | ​ | $ | 224,959 | ​ | $ | 236,984

​

Contract Balances

Contract Assets

Amounts are recorded as accounts receivable when the Company’s right to consideration becomes unconditional. Payment terms on invoiced amounts are typically 30 days for glaucoma and corneal health products, though extended payment terms on corneal health products may be offered. However, the Company does not consider any significant financing components in customer contracts given the expected time between transfer of the promised products and the payment of the associated consideration is less than one year. As of December 31, 2021 and December 31, 2020, all amounts included in accounts receivable, net on the consolidated balance sheets are related to contracts with customers.

Aside from the aforementioned contract assets, the Company does not have any contract assets given that the Company does not have any unbilled receivables and sales commissions on other products are expensed within selling, general and administrative expenses within the consolidated statement of operations when incurred as any incremental cost of obtaining contracts with customers would have an amortization period of less than one year.

Contract Liabilities

Contract liabilities reflect consideration received from customers’ purchases allocated to the Company’s future performance obligations.

The Company has a performance obligation to issue a rebate to customers who may be eligible for a rebate at the conclusion of their contract term. This performance obligation is transferred over time and the Company’s method of measuring progress is the output method, whereby the progress is measured by the estimated rebate earned to date over the total rebate estimated to be earned over the contract period. The Company’s rebate allowance is included in accrued liabilities in the consolidated balance sheets and estimated rebates accrued were not material during the periods presented.

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During the year ended December 31, 2021 and December 31, 2020, the Company did not recognize any revenue related to material changes in transaction prices regarding its contracts with customers and did not recognize any material changes in revenue related to amounts included in contract liabilities at the beginning of the period.

The Company’s net sales within a fiscal year may be impacted seasonally, as demand for U.S. ophthalmic procedures is typically softer in the first quarter and stronger in the fourth quarter of a given year. However, the Company did not experience the same seasonality pattern in 2021 and 2020 due to the COVID-19 pandemic.

Note 8. | Convertible Senior Notes

In June 2020, the Company issued $287.5 million in aggregate principal amount of Convertible Notes pursuant to an indenture dated June 11, 2020, between the Company and Wells Fargo Bank, National Association, as trustee (the Indenture), in a private offering to qualified institutional buyers in accordance with Rule 144A under the Securities Act of 1933, as amended. The Convertible Notes are senior unsecured obligations of the Company and bear interest at a rate of 2.75% per year, payable semi-annually in arrears on June 15 and December 15 of each year, beginning on December 15, 2020. The Convertible Notes will mature on June 15, 2027, unless earlier converted, redeemed or repurchased in accordance with their terms. In connection with issuing the Convertible Notes, the Company received $242.2 million in proceeds, after deducting fees and offering expenses and paying the cost of the capped call transactions described below.

The Convertible Notes may be converted at the option of the holders at any time prior to the close of business on the business day immediately preceding March 15, 2027, only under the following circumstances: (1) during any calendar quarter commencing after the calendar quarter ended on September 30, 2020 (and only during such calendar quarter), if the last reported sale price of the Company’s common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day; (2) during the five business day period immediately after any ten consecutive trading day period (the Measurement Period) in which the trading price (as defined in the Indenture) per $1,000 principal amount of the Convertible Notes for each trading day of the Measurement Period was less than 98% of the product of (i) the last reported sale price of the Company’s common stock and (ii) the conversion rate in effect on each such trading day; (3) with respect to any Convertible Notes the Company calls for redemption, at any time prior to the close of business on the business day immediately preceding the redemption date, even if the Convertible Notes are not otherwise convertible at such time; or (4) upon the occurrence of specified corporate events. On or after March 15, 2027 until the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert all or any portion of their Convertible Notes, in multiples of $1,000 principal amount, at the option of the holder regardless of the foregoing circumstances. Upon conversion, the Company will pay or deliver, as the case may be, cash, shares of the Company’s common stock or a combination of cash and shares of the Company’s common stock, at the Company’s election, in the manner and subject to the terms and conditions provided in the Indenture. As of December 31, 2021, none of the conditions allowing holders of the Convertible Notes to convert had been met.

The conversion rate for the Convertible Notes is initially 17.8269 shares of the Company’s common stock per $1,000 principal amount of the Convertible Notes (equivalent to an initial conversion price of approximately $56.10 per share of the Company’s common stock). The conversion rate is subject to adjustment in some events in accordance with the terms of the Indenture but will not be adjusted for any accrued and unpaid interest. In addition, following certain corporate events that occur prior to the maturity date or if the Company delivers a notice of redemption, the Company will, in certain circumstances, increase the conversion rate for a holder who elects to convert its Convertible Notes in connection with such a corporate event or notice of redemption, as the case may be.

The Company may not redeem the Convertible Notes prior to June 20, 2024. The Company may redeem for cash all or any portion of the Convertible Notes, at its option, on or after June 20, 2024 but before the 45th scheduled trading day immediately preceding the maturity date, if the last reported sale price of the Company’s common stock has been at least 130% of the conversion price then in effect on (i) each of at least 20 trading days (whether or not consecutive) during the 30 consecutive trading day period ending on, and including, the trading day immediately preceding the date on which the Company provides notice of redemption and (ii) the trading day immediately preceding

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the date the Company sends such notice, at a redemption price equal to 100% of the principal amount of the Convertible Notes to be redeemed, plus accrued and unpaid interest to, but excluding, the redemption date. No sinking fund is provided for the Convertible Notes.

If the Company undergoes a fundamental change (as defined in the Indenture), holders may require the Company to repurchase for cash all or any portion of their Convertible Notes at a fundamental change repurchase price equal to 100% of the principal amount of the Convertible Notes to be repurchased, plus accrued and unpaid interest to, but excluding, the fundamental change repurchase date.

Prior to the adoption of ASU 2020-06, the Company allocated the gross proceeds of the Convertible Notes between the liability and equity components of the Convertible Notes. The initial carrying amount of the liability component was $189.8 million, which was calculated by using a discount rate of 9.5%, which was estimated to be the Company’s borrowing rate on the issuance date for a similar debt instrument without the conversion feature. The carrying amount of the equity component was $97.7 million, which represents the conversion option, and was determined by deducting the fair value of the liability component from the par value of the Convertible Notes.

After the adoption of ASU 2020-06, the Convertible Notes are no longer bifurcated into separate liability and equity components in the Company’s consolidated balance sheet as of December 31, 2021. Rather, the $287.5 million principal amount of the Convertible Notes, less $7.5 million in unamortized debt issuance costs, was classified as a long-term liability in the consolidated balance sheet as of December 31, 2021.

Total transaction costs for the issuance of the Convertible Notes were $9.6 million, consisting of the initial purchasers’ discount, commissions, and other issuance costs. Prior to the adoption of ASU 2020-06, the Company allocated the total transaction costs proportionally to the liability and equity components. The transaction costs attributed to the liability component were $6.3 million, which were recorded as debt issuance costs (presented as contra debt in the Company’s consolidated balance sheets) and are amortized to interest expense in the consolidated statements of operations over the term of the Convertible Notes. The transaction costs attributed to the equity component were $3.3 million, which were included in additional paid-in capital.

After the adoption of ASU 2020-06, the Company recorded an adjustment to the liability and equity components under the same premise (i.e., as if debt issuance costs had always been treated as a contra-liability only). As of December 31, 2021, the unamortized debt issuance costs on the Convertible Notes was $7.5 million and is amortized using the effective interest rate method over the term of the Convertible Notes, for the next 5.4 years.

Interest expense relating to the Convertible Notes in the consolidated statements of operations for the year ended December 31, 2021 are summarized as follows (in thousands):

​

​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended | ​ | Year ended
​ | ​ | December 31, | ​ | December 31,
​ |  | 2021 |  | 2020
Contractual interest expense | ​ | $ | 7,906 | ​ | $ | 4,370
Amortization of debt discount | ​ | ​ | - | ​ | ​ | 5,610
Amortization of debt issuance costs | ​ | ​ | 1,373 | ​ | ​ | 364
Total interest expense | ​ | $ | 9,279 | ​ | $ | 10,344

​

The effective interest rate for the years ended December 31, 2021 and December 31, 2020 was 3.2%.

​

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As of December 31, 2021, the convertible senior notes on the consolidated balance sheets represented the carrying amount of the liability component of the Convertible Notes, net of unamortized debt issuance costs, which are summarized as follows (in thousands):

​

​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended | ​ | Year ended
​ | ​ | December 31, | ​ | December 31,
​ |  | 2021 |  | 2020
Convertible Notes | ​ | $ | 287,500 | ​ | ​ | 287,500
Less: Unamortized debt discount | ​ | ​ | - | ​ | ​ | (92,102)
Less: Unamortized debt issuance costs | ​ | ​ | (7,474) | ​ | ​ | (5,982)
Carrying amount of Convertible Notes | ​ | $ | 280,026 | ​ | ​ | 189,416

​

Capped Call Transactions

​

In connection with the offering of the Convertible Notes, in June 2020 the Company entered into privately negotiated capped call transactions with certain financial institutions (the Option Counterparties) and used an aggregate $35.7 million of the net proceeds from the Convertible Notes to pay the cost of the capped call transactions. The capped call transactions are expected generally to reduce potential dilution to the Company’s common stock upon any conversion of the Convertible Notes or at the Company’s election (subject to certain conditions) offset any cash payments the Company is required to make in excess of the aggregate principal amount of converted Convertible Notes, as the case may be, with such reduction or offset subject to a cap based on the cap price. The cap price of the capped call transactions is initially $86.30 per share, which represents a premium of 100% over the last reported sale price of the Company’s common stock on June 8, 2020, and is subject to certain adjustments under the terms of the capped call transactions. The capped calls have an initial strike price of approximately $56.10 per share, subject to certain adjustments, which corresponds to the conversion option strike price in the Convertible Notes. The capped call transactions cover, subject to customary adjustments, the number of shares of common stock initially underlying the Convertible Notes (or approximately 5.1 million shares of the Company’s common stock).

The capped call transactions are separate transactions that the Company entered into with the Option Counterparties, are not part of the terms of the Convertible Notes and will not change the holders’ rights under the Convertible Notes. As the capped call transactions meet certain accounting criteria, the cost of the capped call transactions of $35.7 million was recorded as a reduction in additional paid-in capital in the consolidated balance sheets and will not be remeasured to fair value as long as the accounting criteria continue to be met. As of December 31, 2021, the Company had not purchased any shares under the capped call transactions.

Note 9. | Stock-Based Compensation

The Company has three stock-based compensation plans (collectively, the Stock Plans)— the 2011 Stock Plan (the 2011 Stock Plan), the 2015 Omnibus Incentive Compensation Plan (the 2015 Stock Plan) and the ESPP. The 2015 Stock Plan permits grants of RSU awards. The Company no longer grants any awards under the 2011 Stock Plan.

The purpose of these Stock Plans is to provide incentives to employees, directors and nonemployee consultants. The maximum term of any stock options granted under the Stock Plans is 10 years. For employees and nonemployees, stock options generally vest 25% on the first anniversary of the original vesting date, with the balance vesting monthly or annually over the remaining three years. Stock options are granted at exercise prices at least equal to the fair value of the underlying stock at the date of the grant. For employees and nonemployees, generally, RSU awards vest 25% on each of the first, second, third and fourth anniversaries of the grant date and in certain cases, vest one year after grant date.

The Compensation Committee has approved the grant of performance-based equity awards (PBEAs) to the Company’s named executive officers and certain other employees pursuant to the 2015 Stock Plan. These PBEAs will only vest upon the Compensation Committee’s determination that pre-defined Company operational goals were satisfied.

The ESPP permits eligible employees to purchase shares of the Company’s common stock, using contributions via payroll deductions of up to 15% of their earnings, at a price per share equal to 85% of the lower of the stock’s fair

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market value on the offering date or purchase date. The ESPP is intended to qualify as an “employee stock purchase plan” under Section 423 of the Internal Revenue Code.

The Company has 5,000,000 of authorized preferred stock issuable, and there is no preferred stock outstanding as of December 31, 2021 and December 31, 2020. Each share of common stock is entitled to one vote.

On November 21, 2019, in connection with the Avedro Merger, the Company granted the following awards (the Replacement Awards) to employees of Avedro: (i) approximately 0.2 million cash-settled stock options to certain executives, which became fully vested on December 31, 2019, (ii) approximately 0.1 million stock options and approximately 5,500 RSUs to members of Avedro’s board of directors, which were granted with no post-combination vesting requirements, and (iii) approximately 0.7 million stock options and approximately 0.1 million RSUs, which are subject to time-based vesting requirements. Approximately $30.8 million of the fair value of the Replacement Awards was attributable to pre-combination service and was included in the purchase price of Avedro. The remaining value of the Replacement Awards of $26.0 million is being recognized as post-combination expense over the remaining requisite service period for the time-vesting awards, which as of December 31, 2021, the remaining unamortized balance is immaterial.

​

Valuation and Expense Recognition of Stock-Based Awards

The Company accounts for the measurement and recognition of compensation expense for all share-based awards made to the Company’s employees and nonemployees based on the estimated fair value of the awards.

The fair value of RSU awards made to employees and nonemployees is equal to the closing market price of the Company’s common stock price on the grant date.

The Company uses the Black-Scholes option-pricing model to estimate the fair value of stock options and look back options included as part of the ESPP. The determination of fair value using the Black-Scholes option-pricing model is affected by the estimated fair market value per share of the Company’s common stock as well as assumptions regarding a number of highly complex and subjective variables, including expected stock price volatility, risk-free interest rate, expected dividends and expected option life and generally requires significant management judgment to determine.

Risk-free interest rate. The risk-free interest rate is equal to the U.S. Treasury Note interest rate for the comparable term for the expected option life as of the valuation date. If the expected option life is between the U.S. Treasury Note rates of two published terms, then the risk-free interest rate is based on the straight-line interpolation between the U.S. Treasury Note rates of the two published terms as of the valuation date.

Expected dividend yield. The expected dividend yield is based on the Company’s history and expectation of dividend payouts. The Company has never declared or paid any cash dividends and does not presently plan to pay cash dividends in the foreseeable future.

Expected volatility. The Company has a limited history as a publicly traded entity and a lack of robust Company-specific historical and implied volatility data. During the year ended December 31, 2021, the Company based the expected volatility on a weighted average of the historical volatility of its common stock and historical volatilities of a peer group of similar companies over the most recent period commensurate with the estimated expected term of the Company’s stock options. During the years ended December 31, 2020 and 2019, the expected volatility assumption was based on historical volatilities of a peer group of similar companies whose share prices were publicly available. The peer group was developed based on companies in the biotechnology industry.

Expected term. The Company has concluded that its stock option exercise history does not provide a reasonable basis upon which to estimate expected term, and therefore it uses the simplified method for estimating the expected term of stock option grants. Under this approach, the weighted-average expected term is presumed to be the average of the vesting term and the contractual term of the option.

Fair value of common stock. The Company has used the daily market prices in the determination of the fair value of its common stock.

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Forfeiture rate. The Company reduces share-based compensation expense for estimated forfeitures. Forfeitures are estimated at the time of grant based on historical experience, and revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates.

Stock Options

The following table summarizes stock option activity under the 2011 Stock Plan and 2015 Stock Plan:

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Number of |  | ​ |  | ​ | Weighted- |  | ​ |  | ​
​ | ​ | shares | ​ | Weighted- | ​ | average | ​ | Aggregate | ​
​ | ​ | underlying | ​ | average | ​ | remaining | ​ | intrinsic | ​
​ | ​ | options | ​ | exercise price | ​ | contractual | ​ | value (in | ​
​ | ​ | (in thousands) | ​ | per share |  | life (in years) | ​ | thousands) | ​
Outstanding at December 31, 2018 |  | 6,307 | ​ | $ | 21.36 | ​ | 7.3 | ​ | $ | 69,555 |
Granted |  | 186 | ​ | ​ | 68.10 | ​ | ​ | ​ | ​ | ​ | ​
Replacement Awards | ​ | 803 | ​ | ​ | 13.64 | ​ | ​ | ​ | ​ | ​ | ​
Exercised |  | (696) | ​ | ​ | 21.53 | ​ | ​ | ​ | ​ | 33,132 | ​
Canceled/forfeited/expired |  | (17) | ​ | ​ | 42.75 | ​ | ​ | ​ | ​ | ​ | ​
Outstanding at December 31, 2019 |  | 6,583 | ​ | $ | 23.91 | ​ | 6.1 | ​ | $ | 204,062 | ​
Granted |  | 880 | ​ | ​ | 38.15 | ​ | ​ | ​ | ​ | ​ | ​
Exercised |  | (1,403) | ​ | ​ | 14.42 | ​ | ​ | ​ | ​ | 50,093 | ​
Canceled/forfeited/expired |  | (76) | ​ | ​ | 42.13 | ​ | ​ | ​ | ​ | ​ | ​
Outstanding at December 31, 2020 |  | 5,984 | ​ | $ | 27.59 | ​ | 5.7 | ​ | $ | 285,366 | ​
Granted | ​ | 50 | ​ | ​ | 60.74 | ​ | ​ | ​ | ​ | ​ | ​
Adjustments to certain prior year grants | ​ | (47) | ​ | ​ | 33.38 | ​ | ​ | ​ | ​ | ​ | ​
Exercised | ​ | (1,303) | ​ | ​ | 20.07 | ​ | ​ | ​ | ​ | 68,162 | ​
Canceled/forfeited/expired | ​ | (142) | ​ | ​ | 52.15 | ​ | ​ | ​ | ​ | ​ | ​
Outstanding at December 31, 2021 | ​ | 4,542 | ​ | $ | 29.30 | ​ | 5.0 | ​ | $ | 74,039 | ​
Vested and expected to vest at December 31, 2021 | ​ | 5,316 | (i) | $ | 22.92 | ​ | 3.8 | ​ | $ | 119,428 | ​
Exercisable at December 31, 2021 | ​ | 3,942 | ​ | $ | 27.39 | ​ | 4.5 | ​ | $ | 70,336 | ​

| (i) | Included in the outstanding balance at December 31, 2021 are 276 performance-based options.

Intrinsic value is calculated as the difference between the exercise price of the underlying options and the fair value of the common stock for the options that had exercise prices that were lower than the fair value per share of the common stock on the date of exercise.

The weighted average estimated grant date fair value per share of stock options granted during the years ended December 31, 2021, December 31, 2020 and December 31, 2019 was $43.43, $12.85 and $32.07, respectively.

The total fair value of stock options that vested during the years ended December 31, 2021, December 31, 2020 and December 31, 2019 was $10.3 million, $20.3 million and $33.9 million, respectively.

The fair value of each option award is estimated on the date of grant using a Black-Sholes option pricing model applying the assumptions noted in the following table. The weighted average assumptions used to estimate the fair value of options granted to employees and non-employees were as follows:

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | Year ended |
​ | ​ | ​ | December 31, |
​ | ​ | ​ | 2021 | ​ | ​ | 2020 | ​ | ​ | 2019 |
Risk-free interest rate |  | ​ | 0.98 | % | ​ | 0.71 | % | ​ | 2.17 | %
Expected dividend yield |  | ​ | 0.0 | % | ​ | 0.0 | % | ​ | 0.0 | %
Expected volatility |  | ​ | 43.4 | % | ​ | 48.8 | % | ​ | 46.8 | %
Expected term (in years) |  | ​ | 5.71 | ​ | ​ | 6.01 | ​ | ​ | 6.01 | ​

​

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As of January 1, 2022, the Company has reserved an aggregate of 18.1 million shares of common stock for issuance under the 2015 Stock Plan, and 3.2 million shares of common stock for issuance under the ESPP.

Restricted Stock Units

The following table summarizes the activity of unvested RSUs under the Stock Plans during the years ended December 31, 2021 and December 31, 2020:

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Weighted- | ​
​ | ​ | ​ | Number of | ​ | average | ​
​ | ​ | ​ | shares | ​ | grant date | ​
​ | ​ |  | (in thousands) |  | fair value | ​
Unvested at December 31, 2019 | ​ | ​ | 695 | ​ | $ | 54.40 | ​
Granted | ​ | ​ | 674 | ​ | ​ | 33.69 | ​
Vested | ​ | ​ | (310) | ​ | ​ | 55.96 | ​
Canceled/forfeited | ​ | ​ | (71) | ​ | ​ | 39.03 | ​
Unvested at December 31, 2020 |  | ​ | 988 | ​ | $ | 40.82 | ​
Granted | ​ | ​ | 683 | ​ | ​ | 58.20 | ​
Vested | ​ | ​ | (360) | ​ | ​ | 41.12 | ​
Canceled/forfeited | ​ | ​ | (126) | ​ | ​ | 52.93 | ​
Unvested at December 31, 2021 | ​ | ​ | 1,185 | (i) | $ | 49.65 | ​

| (i) | Included in the unvested balance at December 31, 2021 are 176 performance-based RSU awards.

The total fair value of RSUs made to employees and nonemployees is equal to the closing market price of the Company’s common stock on the grant date. The total fair value of RSUs that vested during the years ended December 31, 2021, December 31, 2020 and December 31, 2019 was $14.8 million, $17.3 million and $8.6 million, respectively.

All Share-Based Compensation Arrangements

The following table summarizes the allocation of stock-based compensation related to stock options and RSUs and includes Replacement Awards, as well as cash-settled stock options in the accompanying consolidated statements of operations (in thousands):

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended |
​ | ​ | December 31, |
​ | ​ | 2021 | ​ | 2020 | ​ | 2019 |
​ | ​ | ​ | ​ |  | ​ | ​ | ​ | ​ | ​ | ​
Cost of sales |  | $ | 1,739 | ​ | $ | 2,440 |  | $ | 1,127 | ​
Selling, general & administrative | ​ | ​ | 21,665 | ​ |  | 32,072 | ​ |  | 31,801 | ​
Research and development | ​ | ​ | 6,742 | ​ |  | 8,793 | ​ |  | 6,553 | ​
Total |  | $ | 30,146 | ​ | $ | 43,305 | ​ | $ | 39,481 | ​

(i) | Of the total stock-based compensation amount of $43.3 million as of December 31, 2020 above, $13.0 million related to the value attributable to the pre-combination services associated with Replacement Awards and a $(3.2) million fair value adjustment was recorded related to cash-settled stock options, and the remainder of the liability of $2.2 million related to the cash-settled options that was previously included in accrued liabilities was, as a result of the modification, reclassified to additional paid-in capital.

(ii) | Of the total stock-based compensation amount of $39.5 million as of December 31, 2019 above, $4.5 million related to the value attributable to the pre-combination services associated with Replacement Awards and $3.1 million relates to cash-settled stock options included in accrued liabilities within the consolidated balance sheet.

In the years ended December 31, 2021, December 31, 2020, and December 31, 2019, the related tax benefits were $12.3 million, $3.5 million and $4.6 million, respectively, relating to stock-based compensation.

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At December 31, 2021, the total unamortized stock-based compensation expense was approximately $56.6 million. Of the approximately $56.6 million in unamortized stock-based compensation expense, $8.2 million was attributable to stock options and is to be recognized over the stock options’ remaining vesting terms of approximately 4.0 years (1.7 years on a weighted average basis). The remaining $48.4 million was attributable to RSUs and is to be recognized over the RSUs’ vesting terms of approximately 4.0 years (1.3 years on a weighted-average basis).

The total stock-based compensation cost capitalized in inventory was not material for the years ended December 31, 2021, December 31, 2020 and December 31, 2019, respectively.

​

​

Note 10. | Income Taxes

United States and foreign (loss) income before income taxes was as follows (in thousands):

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended December 31, |
​ | ​ | 2021 | ​ | 2020 | ​ | 2019 |
United States |  | $ | (51,370) |  | $ | (134,096) |  | $ | (50,339) | ​
Foreign | ​ |  | 2,103 | ​ |  | 1,782 | ​ |  | 303 | ​
Total | ​ | $ | (49,267) | ​ | $ | (132,314) | ​ | $ | (50,036) | ​

​

The income tax provision (benefit) was as follows (in thousands):

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, |
​ | ​ | 2021 | ​ | 2020 | ​ | 2019 |
Current: |  | ​ |  |  | ​ |  |  | ​ |  | ​
Federal | ​ | $ | — | ​ | $ | (949) | ​ | $ | 237 | ​
State | ​ |  | 189 | ​ |  | 275 | ​ |  | 122 | ​
Foreign | ​ |  | 1,162 | ​ |  | 715 | ​ |  | 487 | ​
​ | ​ |  | 1,351 | ​ |  | 41 | ​ |  | 846 | ​
Deferred: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Federal | ​ |  | 264 | ​ |  | (10,098) | ​ |  | (58,368) | ​
State | ​ |  | (1,234) | ​ |  | (1,952) | ​ |  | (7,938) | ​
Foreign | ​ |  | (55) | ​ |  | 43 | ​ |  | — | ​
​ | ​ |  | (1,025) | ​ |  | (12,007) | ​ |  | (66,306) | ​
Income tax provision (benefit) | ​ | $ | 326 | ​ | $ | (11,966) | ​ | $ | (65,460) | ​

​

The reconciliations of the U.S. federal statutory tax expense to the combined effective tax provision (benefit) are as follows:

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended |
​ | ​ | December 31, |
(amounts in thousands) | ​ | 2021 | ​ | ​ | 2020 | ​ | ​ | 2019 |
Statutory rate of tax benefit | $ | (10,346) | ​ | $ | (27,713) | ​ | $ | (10,508) | ​
State income taxes, net of federal benefit |  | (3,395) | ​ | ​ | (4,674) | ​ | ​ | (2,418) | ​
Permanent and other items |  | 4,513 | ​ | ​ | 263 | ​ | ​ | 4,371 | ​
Stock-based compensation |  | (12,310) | ​ | ​ | (3,537) | ​ | ​ | (5,006) | ​
Research credits |  | (5,408) | ​ | ​ | (5,082) | ​ | ​ | (3,594) | ​
Uncertain tax positions |  | 2,685 | ​ | ​ | 3,835 | ​ | ​ | 1,780 | ​
Change in tax rate |  | (802) | ​ | ​ | 1,303 | ​ | ​ | 419 | ​
NOL Carryback Claim | ​ | - | ​ | ​ | (447) | ​ | ​ | - | ​
ASU 2016-09 Implementation & ASC 842 Adoption in 2019 | ​ | - | ​ | ​ | - | ​ | ​ | (104) | ​
Valuation allowance |  | 25,389 | ​ | ​ | 24,086 | ​ | ​ | (50,400) | ​
Income tax provision (benefit) | $ | 326 | ​ | $ | (11,966) | ​ | $ | (65,460) | ​

​

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Significant components of the Company’s net deferred tax assets at December 31, 2021 and December 31, 2020 are as follows (in thousands):

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, |
​ | ​ | 2021 | ​ | 2020 |
Deferred tax assets: |  |  |  |  | ​ |  | ​
Net operating loss carryforwards |  | $ | 100,464 | ​ | $ | 87,684 | ​
Tax credits | ​ | ​ | 16,968 | ​ |  | 14,293 | ​
Stock-based compensation | ​ | ​ | 15,521 | ​ | ​ | 19,972 | ​
Reserves and accruals | ​ | ​ | 10,241 | ​ | ​ | 9,013 | ​
Lease liability | ​ | ​ | 25,188 | ​ | ​ | 20,434 | ​
Other, net | ​ | ​ | 2,120 | ​ | ​ | — | ​
Total deferred tax assets | ​ | $ | 170,502 | ​ | $ | 151,396 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Deferred tax liabilities: | ​ | ​ | ​ | ​ | ​ | ​ | ​
Depreciation and amortization | ​ | ​ | (67,641) | ​ | ​ | (76,034) | ​
ROU Lease Asset | ​ | ​ | (18,747) | ​ | ​ | (17,471) | ​
Convertible Notes | ​ | ​ | — | ​ | ​ | (22,252) | ​
Other, net | ​ | ​ | — | ​ | ​ | (542) | ​
Inventory | ​ | ​ | (59) | ​ | ​ | (59) | ​
Total deferred tax liabilities | ​ | $ | (86,447) | ​ | $ | (116,358) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Valuation allowance | ​ |  | (91,373) | ​ |  | (45,551) | ​
Net deferred tax liability | ​ | $ | (7,318) | ​ | $ | (10,513) | ​

​

Based on the weight of available evidence, management has established a valuation allowance for a portion of its deferred tax assets which it expects will not be realized on a more likely than not basis. The net change in the valuation allowance was $45.8 million in 2021.

At December 31, 2021, the Company had approximately $491.4 million, $328.4 million and $12.3 million of NOL carryforwards for federal, state and foreign purposes, respectively, available to offset future taxable income. The federal NOL carryforwards incurred prior to 2018 begin to expire in 2024. Federal NOL carryforwards of $239.2 million will not expire but can only be used to offset 80 percent of future taxable income. The state and foreign NOL carryforwards begin to expire in 2022.

At December 31, 2021, the Company had federal and state R&D credit carryforwards of $35.6 million and $18.4 million, respectively. Federal credits begin to expire in 2022, state credits of $4.1 million begin to expire in 2023, and state credits of $14.3 million carry forward indefinitely.

Utilization of the NOL and tax credit carryforwards will be subject to annual limitations under IRC Section 382 and Section 383 due to several ownership changes that have occurred previously or that could occur in the future. These ownership changes may limit the amount of NOL and tax credit carryforwards and other deferred tax assets that can be utilized to offset future taxable income and/or income tax liabilities. In general, all ownership changes as defined by IRC Section 382 result from transactions increasing ownership of certain stockholders in the stock of the Company by more than 50 percentage points over a three-year period.

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A reconciliation of the beginning and ending amount of gross unrecognized tax benefits for the years ended December 31, 2021, December 31, 2020 and December 31, 2019 excluding interest and penalties, is as follows (in thousands):

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
​ | ​ | 2021 | ​ | 2020 | ​ | 2019
Balance at beginning of the year |  | $ | 22,803 |  | $ | 15,076 |  | $ | 13,486
Net addition for tax positions - prior years | ​ | ​ | 505 | ​ | ​ | 4,987 | ​ | ​ | 230
Net additions for tax positions - current year | ​ | ​ | 3,489 | ​ |  | 3,355 | ​ |  | 2,339
Subtractions from tax positions - prior years | ​ | ​ | (327) | ​ | ​ | (74) | ​ | ​ | (537)
Subtractions from tax positions - current year | ​ | ​ | (654) | ​ | ​ | (541) | ​ | ​ | (442)
Balance at end of the year | ​ | $ | 25,816 | ​ | $ | 22,803 | ​ | $ | 15,076

​

As of December 31, 2021, approximately $0.5 million of unrecognized tax benefits would reduce the Company’s annual effective tax rate if recognized.

The Company’s policy is to recognize interest expense and penalties related to income tax matters as a component of its income tax provision (benefit). There was no accrued interest and penalties associated with uncertain tax positions as of December 31, 2021, December 31, 2020 and December 31, 2019. It is not anticipated that there will be a significant change in the unrecognized tax benefits over the next 12 months.

Due to the Company’s NOL carryforwards, its federal, state and foreign income tax returns are open to examination by the Internal Revenue Service (IRS) and other taxing jurisdictions for all years since 2002. In November 2020, the IRS concluded its examination of the Company’s 2017 federal income tax return with no proposed adjustments.

There are no cumulative earnings in the Company’s foreign subsidiaries as of December 31, 2021 that would be subject to U.S. income tax or foreign withholding tax. The Company plans to indefinitely reinvest any future earnings of its foreign subsidiaries.

​

Note 11. Employee Benefits

Defined Contribution Plan

The Company sponsors a defined contribution plan pursuant to section 401(k) of the U.S. Internal Revenue Code that allows participating employees to contribute up to 100% of their salary, to an annual maximum of $19,500 in 2021 and 2020 ($26,000 in 2021 and 2020 for employees over the age of 50). Through December 31, 2021, the Company has only made “qualified nonelective contributions” to maintain compliance with IRS regulations.

During the years ended December 31, 2021 and December 31, 2019, the Company contributed a $0.50 match for every $1.00 contributed by a participating employee up to 6% of plan-eligible earnings, with such Company contributions becoming fully vested when participating employees reach the 3-year anniversary from their date of hire, giving credit for past service. For the years ended December 31, 2021, and December 31, 2019, Company contributions totaled approximately $2.1 million and $1.6 million, respectively.

During the first quarter of 2020, the Company contributed a $0.50 match for every $1.00 contributed by a participating employee up to 6% of plan-eligible earnings for a portion of the year. As a result of the COVID-19 pandemic, the Company instituted a number of cost saving initiatives, including temporarily ceasing Company contributions to participating employees’ 401(k) plans, which the Company reinstated as of January 1, 2021. For the year ended December 31, 2020, Company contributions totaled approximately $0.5 million.

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Deferred Compensation Plan

Pursuant to the Company’s deferred compensation plan (the Deferred Compensation Plan), eligible senior level employees are permitted to make elective deferrals of compensation to which they will become entitled in the future. The Company has also established a rabbi trust that serves as an investment to shadow the Deferred Compensation Plan liability. The investments of the rabbi trust consist of COLIs. The fair value of the Deferred Compensation Plan liability, included in other liabilities on the consolidated balance sheets, was approximately $7.3 million and $5.2 million as of December 31, 2021 and December, 31, 2020, respectively, and the cash surrender value of the COLIs, included in deposits and other assets on the consolidated balance sheets, which reflects the underlying assets at fair value, was approximately $7.4 million and $5.3 million as of December 31, 2021 and December 31, 2020, respectively.

​

Note 12. | Commitments and Contingencies

Patent Litigation Settlement

For discussion of the Company’s Ivantis Settlement Agreement please see Note 1. Organization and Basis of Presentation.

Secured Letters of Credit

The Company had a bank issue a letter of credit in the amount of $8.8 million that is related to its Aliso Facility. The letter of credit is secured with an amount of cash held in a restricted account of approximately $8.8 million as of December 31, 2021 and December 31, 2020. Beginning as of the first day of the thirty-seventh month of the lease term, and on each twelve month anniversary thereafter, the letter of credit will be reduced by 20% until the letter of credit amount has been reduced to $2.0 million.

The Company has other irrevocable standby letters of credit secured with approximately $0.6 million of cash in a restricted account related to its office lease agreements.

Purchase Commitment

As of December 31, 2021, the Company had noncancelable, firm purchase commitments of $1.9 million due beyond one year.

Regents of the University of California

On December 30, 2014, the Company executed an agreement (the UC Agreement) with the Regents of the University of California (the University) to correct inventorship in connection with a group of the Company’s U.S. patents (the Patent Rights) and to obtain from the University a covenant that it did not and would not claim any right or title to the Patent Rights and will not challenge or assist any others in challenging the Patent Rights. In connection with the UC Agreement, Glaukos agreed to pay to the University a low single-digit percentage of worldwide net sales of certain current and future products, including the Company’s iStent products, with a required minimum annual payment of $0.5 million. This ongoing product payment obligation will change as patent coverage on certain products begins to lapse, and will terminate entirely on the date the last of the Patent Rights expires, which is currently expected to be in the fourth quarter of 2022. For the years ended December 31, 2021, December 31, 2020 and December 31, 2019, the Company recorded approximately $4.2 million, $4.5 million and $5.7 million, respectively, in cost of sales in connection with the product payment obligation.

Indemnification

In the ordinary course of business, the Company enters into agreements that may include indemnification provisions. Pursuant to such agreements, the Company may indemnify, hold harmless and defend the indemnified parties for losses suffered or incurred by the indemnified party. Some of the provisions will limit losses to those arising from third-party actions. In some cases, the indemnification will continue after the termination of the agreement. The maximum potential amount of future payments the Company could be required to make under these provisions is not

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determinable. To date, the Company has not incurred material costs to defend lawsuits or settle claims related to these indemnification provisions. The Company has also entered into indemnification agreements with its directors and officers that may require it to indemnify its directors and officers against liabilities that may arise by reason of their status or service as directors or officers to the fullest extent permitted by corporate law. The Company also has directors’ and officers’ insurance.

​

Note 13. | Business Segment Information

The Company has one business activity and operates as one operating segment: the development and commercialization of ophthalmic therapies designed to treat glaucoma, corneal disorders and retinal diseases. The Company determined its operating segment on the same basis that it uses to evaluate its performance internally. The Company’s revenues disaggregated by revenue and product category are included in Note 7, Revenue from Contracts with Customers. The Company’s chief operating decision-maker, its Chief Executive Officer, reviews its consolidated operating results for the purpose of allocating resources and evaluating financial performance.

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Property and equipment, net | ​ | Depreciation and amortization | ​ | ​ | Capital expenditures
​ | ​ | As of December 31, | ​ | Year ended December 31, | ​ | ​ | Year ended December 31,
​ | ​ | 2021 | ​ | 2020 | ​ | 2019 | ​ | 2021 | ​ | ​ | 2020 | ​ | ​ | 2019 | ​ | 2021 | ​ | 2020 | ​ | 2019
​ | ​ | ​ | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |  | ​ | ​ | ​ | ​ | ​
United States |  | $ | 68,839 |  | $ | 23,896 |  | $ | 21,932 |  | $ | 29,622 |  | $ | 29,306 |  | $ | 6,273 |  | $ | 47,714 |  | $ | 6,907 |  | $ | 4,681
International | ​ | ​ | 130 | ​ |  | 112 | ​ |  | 124 | ​ | ​ | 39 | ​ | ​ | 75 | ​ | ​ | 33 | ​ | ​ | 71 | ​ |  | 28 | ​ |  | 44
Total |  | $ | 68,969 | ​ | $ | 24,008 | ​ | $ | 22,056 | ​ | $ | 29,661 | ​ | $ | 29,381 | ​ | $ | 6,306 | ​ | $ | 47,785 | ​ | $ | 6,935 | ​ | $ | 4,725

​

​

Note 14. | Selected Quarterly Financial Information (Unaudited)

​

​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended | ​
​ | ​ | March 31, | ​ | June 30, | ​ | September 30, | ​ | December 31, | ​
(in thousands, except per share amounts) | ​ | 2021 | ​ | 2021 | ​ | 2021 | ​ | 2021 | ​
Net sales |  | $ | 67,968 |  | $ | 78,093 |  | $ | 74,710 |  | $ | 73,240 |
Cost of sales | ​ |  | 16,633 | ​ |  | 17,759 | ​ |  | 15,370 | ​ | ​ | 16,865 | ​
Gross profit | ​ |  | 51,335 | ​ |  | 60,334 | ​ |  | 59,340 | ​ | ​ | 56,375 | ​
Operating expenses: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Selling, general and administrative | ​ |  | 41,921 | ​ |  | 45,300 | ​ |  | 44,470 | ​ | ​ | 47,566 | ​
Research and development | ​ |  | 21,219 | ​ |  | 24,256 | ​ |  | 28,846 | ​ | ​ | 26,678 | ​
In-process research and development | ​ | ​ | — | ​ | ​ | 5,000 | ​ | ​ | 5,000 | ​ | ​ | — | ​
Litigation-related settlement | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (30,000) | ​ | ​ | — | ​
Total operating expenses | ​ |  | 63,140 | ​ |  | 74,556 | ​ |  | 48,316 | ​ | ​ | 74,244 | ​
(Loss) income from operations | ​ |  | (11,805) | ​ |  | (14,222) | ​ |  | 11,024 | ​ | ​ | (17,869) | ​
Non-operating expense | ​ |  | (4,385) | ​ |  | (3,052) | ​ |  | (4,592) | ​ | ​ | (4,366) | ​
Income tax provision (benefit) | ​ |  | 279 | ​ |  | 208 | ​ |  | 202 | ​ |  | (363) | ​
Net (loss) income | ​ | $ | (16,469) | ​ | $ | (17,482) | ​ | $ | 6,230 | ​ | $ | (21,872) | ​
Net (loss) income per share (1): | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Basic and diluted | ​ | $ | (0.36) | ​ | $ | (0.38) | ​ | $ | 0.13 | ​ | $ | (0.47) | ​

​

​

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​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended |
​ | ​ | March 31, | ​ | June 30, | ​ | September 30, | ​ | December 31, |
(in thousands, except per share amounts) | ​ | 2020 | ​ | 2020 | ​ | 2020 | ​ | 2020 |
Net sales |  | $ | 55,336 |  | $ | 31,558 |  | $ | 64,831 |  | $ | 73,234 | ​
Cost of sales | ​ |  | 32,529 | ​ |  | 21,668 | ​ |  | 17,932 | ​ | ​ | 19,590 | ​
Gross profit | ​ |  | 22,807 | ​ |  | 9,890 | ​ |  | 46,899 | ​ | ​ | 53,644 | ​
Operating expenses: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Selling, general and administrative | ​ |  | 50,546 | ​ |  | 38,116 | ​ |  | 38,947 | ​ | ​ | 43,792 | ​
Research and development | ​ |  | 24,873 | ​ |  | 18,971 | ​ |  | 20,304 | ​ | ​ | 21,244 | ​
Total operating expenses | ​ |  | 75,419 | ​ |  | 57,087 | ​ |  | 59,251 | ​ | ​ | 65,036 | ​
Loss from operations | ​ |  | (52,612) | ​ |  | (47,197) | ​ |  | (12,352) | ​ | ​ | (11,392) | ​
Non-operating expense | ​ |  | (1,896) | ​ |  | (81) | ​ |  | (4,285) | ​ | ​ | (2,499) | ​
Income tax provision | ​ |  | (450) | ​ |  | (7,384) | ​ |  | (889) | ​ |  | (3,243) | ​
Net loss | ​ | $ | (54,058) | ​ | $ | (39,894) | ​ | $ | (15,748) | ​ | $ | (10,648) | ​
Net loss per share (1): | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Basic and diluted | ​ | $ | (1.24) | ​ | $ | (0.90) | ​ | $ | (0.35) | ​ | $ | (0.24) | ​

​

(1) | Net income or loss per share is computed independently for each of the quarters presented. Therefore, the sum of the quarterly per-share amounts will not necessarily equal the annual per share amount.

​

Note 15. Subsequent Events

In January 2022, pursuant to the terms of the Settlement Agreement, Ivantis made its second $30.0 million cash payment to the Company, which was to be paid by the earlier of (i) December 31, 2022, or (ii) 30 days after the consummation of the sale to a third party of all or substantially all of Ivantis’ equity or assets such that the third-party controls Ivantis.

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ITEM 9. | CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE

None.​

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ITEM 9A. | CONTROLS AND PROCEDURES

Evaluation of Disclosure Controls and Procedures

The term “disclosure controls and procedures,” as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act, refers to controls and procedures 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, or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure. Our management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving their objectives and our management necessarily applies its judgment in evaluating the cost-benefit relationship of possible controls and procedures. Our management, with the participation of our chief executive officer and our chief financial officer, evaluated the effectiveness of our disclosure controls and procedures as of the end of the period covered by this Annual Report on Form 10-K. Based on that evaluation, our chief executive officer and our chief financial officer concluded that our disclosure controls and procedures were effective, at the reasonable assurance level, as of December 31, 2021.

Management’s Annual Report on Internal Control Over Financial Reporting and Attestation Report of the Registered Public Accounting Firm

Our management is responsible for establishing and maintaining adequate internal control over financial reporting as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act to provide reasonable assurance regarding the reliability of our financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. Internal control over financial reporting includes those policies and procedures that (i) pertain to the maintenance of records that in reasonable detail accurately and fairly reflect the transactions and dispositions of our assets; (ii) provide reasonable assurance that the transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that our receipts and expenditures are being made only in accordance with authorizations of our management and our directors; and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of our assets that could have a material effect on the financial statements.

Our management, with the participation of our chief executive officer and our chief financial officer, conducted an evaluation of the effectiveness of our internal control over financial reporting as of the end of the period covered by this Annual Report on Form 10-K based on the framework in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this evaluation, management concluded that the Company’s internal control over financial reporting was effective as of December 31, 2021.

Ernst & Young LLP, our independent registered public accounting firm, which audited the consolidated financial statements included in this Annual Report on Form 10-K, has issued an attestation report on our internal control over financial reporting. See Report of Independent Registered Public Accounting Firm below.

Changes in Internal Control over Financial Reporting

There have been no changes in our internal control over financial reporting, as such term is defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act, during our fourth fiscal quarter of 2021 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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Report of Independent Registered Public Accounting Firm

To the Stockholders and the Board of Directors of Glaukos Corporation

Opinion on Internal Control Over Financial Reporting

We have audited Glaukos Corporation’s internal control over financial reporting as of December 31, 2021, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) (the COSO criteria). In our opinion, Glaukos Corporation (the Company) maintained, in all material respects, effective internal control over financial reporting as of December 31, 2021, based on the COSO criteria.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated balance sheets of the Company as of December 31, 2021 and 2020, the related consolidated statements of operations, comprehensive (loss) income, stockholders’ equity, and cash flows for each of the three years in the period ended December 31, 2021, and the related notes and our report dated February 28, 2022 expressed an unqualified opinion thereon.

Basis for Opinion

The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting included in the accompanying Management’s Annual Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting 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 effective internal control over financial reporting was maintained in all material respects.

Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control Over Financial Reporting

A company’s internal control over financial reporting is a process designed 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. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ Ernst & Young LLP

Irvine, California

February 28, 2022

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ITEM 9B. | OTHER INFORMATION

None.

ITEM 9C. | DISCLOSURE REGARDING FOREIGN JURISDICTIONS THAT PREVENT INSPECTIONS

Not applicable

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PART III

ITEM 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE

We have adopted a written code of business conduct and ethics that applies to our directors, executive officers and employees, including our principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions. A current copy of the code is posted on the investor section of our web site, www.glaukos.com. To the extent required by rules adopted by the SEC and NYSE, we intend to promptly disclose future amendments to certain provisions of the code, or waivers of such provisions granted to executive officers and directors, in the Corporate Governance section of our Investor Relations web site at investors.glaukos.com.

The remaining information required by this Item 10 will be included in our Proxy Statement for the 2022 Annual Meeting of Stockholders, which will be filed with the SEC no later than 120 days after the close of the fiscal year ended December 31, 2021, and is incorporated herein by reference.​

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ITEM 11. | EXECUTIVE COMPENSATION

The information required by this Item 11 will be included in our Proxy Statement for the 2022 Annual Meeting of Stockholders, which will be filed with the SEC no later than 120 days after the close of the fiscal year ended December 31, 2021, and is incorporated herein by reference.

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ITEM 12. | SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS

The information required by this Item 12 will be included in our Proxy Statement for the 2022 Annual Meeting of Stockholders, which will be filed with the SEC no later than 120 days after the close of the fiscal year ended December 31, 2021, and is incorporated herein by reference.

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ITEM 13. | CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE

The information required by this Item 13 will be included in our Proxy Statement for the 2022 Annual Meeting of Stockholders, which will be filed with the SEC no later than 120 days after the close of the fiscal year ended December 31, 2021, and is incorporated herein by reference.

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ITEM 14. | PRINCIPAL ACCOUNTANT FEES AND SERVICES

The information required by this Item 14 will be included in our Proxy Statement for the 2022 Annual Meeting of Stockholders, which will be filed with the SEC no later than 120 days after the close of the fiscal year ended December 31, 2021, and is incorporated herein by reference.​

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PART IV

ITEM 15. | EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

| (a) | List of documents filed as part of this Annual Report on Form 10-K:

| (1) | Financial Statements

The financial statements included in Part II, Item 8 of this document are filed as part of this Annual Report on Form 10-K.

| (2) | Financial Statement Schedules

Schedules have been omitted because they are not applicable or the amounts are immaterial or the required information is presented in the financial statements or notes thereto.

| (b) | Exhibits

The exhibits listed in the Exhibit Index below are filed, furnished or incorporated by reference as part of this Annual Report on Form 10-K.​

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INDEX TO EXHIBITS

Exhibit Number |  | Description
| ​ |
2.1 | ​ | Agreement and Plan of Merger, dated as of August 7, 2019, among Glaukos Corporation, Atlantic Merger Sub Inc., and Avedro, Inc. (incorporated by reference to Exhibit 2.1 to the Current Report on Form 8-K (File No. 001-37463) filed on August 8, 2019).
3.1 | ​ | Restated Certificate of Incorporation of the Registrant (incorporated by referenced to Exhibit 3.1 to the Current Report on Form 8-K (File No. 001-37463) filed on June 30, 2015).
3.2 | ​ | Amended and Restated Bylaws of the Registrant (incorporated by reference to Exhibit 3.1 to the Current Report on Form 8-K (File No. 001-37463) filed on November 20, 2020).
4.1 | ​ | Indenture, dated as of June 11, 2020, between Glaukos Corporation and Wells Fargo Bank, National Association, as trustee (incorporated by reference to Exhibit 4.1 to the Current Report on Form 8-K (File No. 001-37463) filed on June 12, 2020).
4.2 | ​ | Form of 2.75% Convertible Senior Notes due 2027 (included in Exhibit 4.1) (incorporated by reference to Exhibit 4.1 to the Current Report on Form 8-K (File No. 001-37463) filed on June 12, 2020).
4.3 | ​ | Description of Capital Stock of Glaukos Corporation (incorporated by reference to Exhibit 4.3 to the Annual Report on Form 10-K (File No. 001-37463) filed on March 1, 2021).
10.1 | ​ | Fourth Amended and Restated Investors’ Rights Agreement, dated as of January 25, 2011, by and among the Registrant and the stockholders named therein (incorporated by reference to Exhibit 10.1 to the Registration Statement on Form S-1 (File No. 333-204091) filed on May 12, 2015).
10.2 | ​ | Amendment No. 1 to the Fourth Amended and Restated Investors’ Rights Agreement, dated as of January 22, 2013, by and among the Registrant and the stockholders named therein (incorporated by reference to Exhibit 10.2 to the Registration Statement on Form S-1 (File No. 333-204091) filed on May 12, 2015).
10.3 | ​ | Amendment No. 2 to the Fourth Amended and Restated Investors’ Rights Agreement, dated as of July 10, 2014, by and among the Registrant and the stockholders named therein (incorporated by reference to Exhibit 10.3 to the Registration Statement on Form S-1 (File No. 333-204091) filed on May 12, 2015).
10.4+ | ​ | Form of Director and Executive Officer Indemnification Agreement (incorporated by reference to Exhibit 10.1 to the Quarterly Report on Form 10-Q (File No. 333-37463) filed on August 5, 2021).
10.5+ | ​ | 2011 Stock Plan (incorporated by reference to Exhibit 10.12 to the Registration Statement on Form S-1 (File No. 333-204091) filed on May 12, 2015).
10.6+ | ​ | Form of Notice of Incentive Stock Option Grant and Stock Option Agreement under the 2011 Stock Plan (incorporated by reference to Exhibit 10.13 to the Registration Statement on Form S-1 (File No. 333-204091) filed on May 12, 2015).
10.7+ | ​ | Form of Notice of Non-Statutory Stock Option Grant and Stock Option Agreement under the 2011 Stock Plan (incorporated by reference to Exhibit 10.14 to the Registration Statement on Form S-1 (File No. 333-204091) filed on May 12, 2015).
10.8+ | ​ | Form of Notice of Grant of Restricted Stock Units and Restricted Stock Unit Agreement under the 2015 Omnibus Incentive Compensation Plan (incorporated by reference to Exhibit 10.1 to the Quarterly Report on Form 10-Q (File No. 001-37463) filed on August 7, 2017).
10.9+ | ​ | Form of Notice of Grant of Option and Option Award Agreement under the 2015 Omnibus Incentive Compensation Plan (incorporated by reference to Exhibit 10.1 to the Quarterly Report on Form 10-Q (File No. 001-37463) filed on May 9, 2018).
10.10+ | ​ | Form of Notice of Grant of Restricted Stock Units and Restricted Stock Unit Agreement under the 2015 Omnibus Incentive Compensation Plan (incorporated by reference to Exhibit 10.1 to the Quarterly Report on Form 10-Q (File No. 001-37463) filed on August 6, 2018).

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Exhibit Number |  | Description
10.11+ | ​ | Form of Director Notice of Grant of Restricted Stock Units and Restricted Stock Unit Agreement under the 2015 Omnibus Incentive Compensation Plan. (incorporated by reference to Exhibit 10.22 to the Annual Report on Form 10-K (File No. 001-37463) filed on February 28, 2018).
10.12+ | ​ | Form of Notice of Grant of Performance-Based Equity Award under the 2015 Omnibus Incentive Compensation Plan (incorporated by reference to Exhibit 10.15 to the Annual Report on Form 10-K (File No. 001-37463) filed on March 2, 2020).
10.13+ | ​ | 2015 Omnibus Incentive Compensation Plan (incorporated by reference to Exhibit 10.15 to Amendment No. 2 to the Registration Statement on Form S-1 (File No. 333-204091) filed on June 15, 2015).
10.14+ | ​ | 2015 Employee Stock Purchase Plan (incorporated by reference to Exhibit 10.16 to Amendment No. 2 to the Registration Statement on Form S-1 (File No. 333-204091) filed on June 15, 2015).
10.15+ | ​ | Thomas W. Burns Offer Letter dated July 10, 2014 (incorporated by reference to Exhibit 10.17 to the Registration Statement on Form S-1 (File No. 333-204091) filed on May 12, 2015).
10.16+ | ​ | Thomas W. Burns Amended and Restated Executive Severance and Change in Control Agreement dated November 3, 2017 (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K (File No 001-37463) filed on November 7, 2017).
10.17+ | ​ | Chris M. Calcaterra Offer Letter dated July 10, 2014 (incorporated by reference to Exhibit 10.19 to the Registration Statement on Form S-1 (File No. 333-204091) filed on May 12, 2015).
10.18+ | ​ | Chris M. Calcaterra Amended and Restated Executive Severance and Change in Control Agreement dated November 3, 2017 (incorporated by reference to Exhibit 10.2 to the Current Report on Form 8-K (File No. 001-37463) filed on November 7, 2017).
10.19+ | ​ | Joseph E. Gilliam Offer Letter dated February 3, 2017 (incorporated by reference to Exhibit 99.2 to the to the Company’s Current Report on Form 8-K (File No. 001-37463) filed on February 6, 2017).
10.20+ | ​ | Joseph E. Gilliam Amended and Restated Executive Severance and Change in Control Agreement dated November 3, 2017 (incorporated by reference to Exhibit 10.3 to the Current Report on Form 8-K (File No. 001-37463) filed on November 7, 2017).
10.21+ | ​ | The Executive Nonqualified Excess Plan and the Executive Nonqualified Excess Plan Adoption Agreement (incorporated by reference to Exhibit 10.20 to the Annual Report on Form 10-K (File No. 001-37463) filed on March 15, 2017).
10.22+* | ​ | Directors’ Compensation Policy
10.23 | ​ | Standard Industrial/Commercial Single-Tenant Lease—Net, dated as of June 8, 2015, by and between the Registrant and 229 Fabricante, LLC (incorporated by reference to Exhibit 10.35 to Amendment No. 2 to the Registration Statement on Form S-1 (File No. 333-204091) filed on June 15, 2015).
10.24 | ​ | First Amendment to Lease dated as of December 31, 2018 between the Registrant and 229 Avenida Fabricante, LLC (incorporated by reference to Exhibit 10.3 to the Quarterly Report on Form 10-Q (File No. 001-37463) filed on August 7, 2020).
10.25 | ​ | Second Amendment to Lease dated as of July 2, 2020 between the Registrant and 229 Avenida Fabricante, LLC (incorporated by reference to Exhibit 10.4 to the Quarterly Report on Form 10-Q (File No. 001-37463) filed on August 7, 2020).
10.26 | ​ | Office Building Lease dated as of November 14, 2018, by and between the Registrant and CIP 2014/SG, Aliso Owner LLC. (incorporated by reference to Exhibit 10.27 to the Annual Report on Form 10-K (File No. 001-37463) filed on February 28, 2019).
10.27 | ​ | First Amendment to Office Building Lease dated as of December 12, 2018 between the Registrant and CIP 2014/SG Aliso Owner, LLC (incorporated by reference to Exhibit 10.5 to the Quarterly Report on Form 10-Q (File No. 001-37463) filed on August 7, 2020).

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Exhibit Number |  | Description
10.28 | ​ | Second Amendment to Office Building Lease dated as of May 20, 2020 between the Registrant and CIP 2014/SG Aliso Owner, LLC (incorporated by reference to Exhibit 10.6 to the Quarterly Report on Form 10-Q (File No. 001-37463) filed on August 7, 2020).
10.29 | ​ | Amended and Restated Patent License Agreement, by and between the Registrant and DOSE Medical Corporation, dated as of June 30, 2015 (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K (File No. 001-37463) filed on June 30, 2015).
10.30 | ​ | First Amendment to Amended and Restated Patent License Agreement dated as of April 12, 2017 by and between Glaukos Corporation and DOSE Medical Corporation (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K (File No. 001-37463) filed on April 12, 2017).
10.31 | ​ | Agreement and Plan of Merger, dated as of June 19, 2019, by and between Glaukos Corporation, GKOS Merger Sub, Inc., DOSE Medical Corporation and Fortis Advisors LLC, solely in its capacity as the Stockholders’ Representative (incorporated by reference to Exhibit 99.2 to the Current Report on Form 8-K (File No. 001-37463) filed on June 19, 2019).
10.32 | ​ | Form of Capped Call Confirmation (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K (File No. 001-37463) filed on June 12, 2020).
21* | ​ | Subsidiaries of Glaukos Corporation as of December 31, 2021
23.1* | ​ | Consent of Independent Registered Public Accounting Firm
31.1* | ​ | Certification of Chief Executive Officer pursuant to Rule 13a-14(a) and Rule 15d-14(a) of the Securities Exchange Act of 1934, as amended, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2* | ​ | Certification of Chief Financial Officer pursuant to Rule 13a-14(a) and Rule 15d-14(a) of the Securities Exchange Act of 1934, as amended, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1** | ​ | Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2** | ​ | Certification of Chief Financial Officer pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INS* | ​ | XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document
101.SCH* | ​ | XBRL Taxonomy Schema Linkbase Document
101.CAL* | ​ | XBRL Taxonomy Calculation Linkbase Document
101.DEF* | ​ | XBRL Taxonomy Definition Linkbase Document
101.LAB* | ​ | XBRL Taxonomy Labels Linkbase Document
101.PRE* | ​ | XBRL Taxonomy Presentation Linkbase Document
104 | ​ | Cover Page Interactive Data File - the cover page interactive data file does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document

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+ Indicates a management contract or compensatory plan or arrangement.

* Filed Herewith.

** Furnished Herewith.

ITEM 16. | FORM 10-K SUMMARY

None.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of San Clemente, State of California, on February 28, 2022.

​ |  |
​ | GLAUKOS CORPORATION
​ | ​
​ | By: | /s/ Thomas W. Burns
​ | ​ | Thomas W. Burns
​ | ​ | Chief Executive Officer and President
​ | ​ | ​

​

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed by the following persons in the capacities and on the dates indicated.

​

Signature |  | Title |  | Date
​ | ​ | ​ | ​ | ​
/s/ Thomas W. Burns | ​ | Chief Executive Officer, President | ​ | February 28, 2022
Thomas W. Burns | ​ | and Chairman of the Board (Principal Executive Officer) | ​ | ​
​ | ​ | ​ | ​ | ​
/s/ Joseph E. Gilliam | ​ | Chief Financial Officer & SVP, Corporate Development | ​ | February 28, 2022
Joseph E. Gilliam | ​ | (Principal Accounting and Financial Officer) | ​ | ​
​ | ​ | ​ | ​ | ​
/s/ Mark J. Foley | ​ | Lead Independent Director | ​ | February 28, 2022
Mark J. Foley | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​
/s/ David F. Hoffmeister | ​ | Director | ​ | February 28, 2022
David F. Hoffmeister | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​
/s/ Marc A. Stapley | ​ | Director | ​ | February 28, 2022
Marc A. Stapley | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​
/s/ Aimee S. Weisner | ​ | Director | ​ | February 28, 2022
Aimee S. Weisner | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​
/s/ Gilbert H. Kliman | ​ | Director | ​ | February 28, 2022
Gilbert H. Kliman, M.D. | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​
/s/ LEANA S. WEN | ​ | Director | ​ | February 28, 2022
Leana S. Wen, M.D. | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​
/s/ DENICE M. TORRES | ​ | Director | ​ | February 28, 2022
Denice M. Torres | ​ | ​ | ​ | ​

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