UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

(Mark One)

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

For the fiscal year ended December 31, 2023

OR

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

For the transition period from           to             

Commission File Number 001-32335

_________________________

HALOZYME THERAPEUTICS, INC.

(Exact name of registrant as specified in its charter)

___________________________

Delaware	88-0488686
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
12390 El Camino Real	92130
San Diego	(Zip Code)
California
(Address of principal executive offices)

(858) 794-8889

(Registrant’s telephone number, including area code)

Securities registered under Section 12(b) of the Act:

Title of Each Class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, $0.001 Par Value	HALO	The NASDAQ Stock Market, LLC

Securities registered under Section 12(g) of the Act:

None

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

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

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

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

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

 

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

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

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. ☐

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b). ☐

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

The aggregate market value of the voting and non-voting common equity held by non-affiliates of the registrant as of June 30, 2023 was approximately $3.5 billion based on the closing price on the NASDAQ Global Select Market reported for such date. Shares of common stock held by each officer and director and by each person who is known to own 10% or more of the outstanding common stock have been excluded in that such persons may be deemed to be affiliates of the registrant. This determination of affiliate status is not necessarily a conclusive determination for other purposes.

The number of outstanding shares of the registrant’s common stock, par value $0.001 per share, was 126,824,800 as of February 12, 2024.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the registrant’s definitive Proxy Statement to be filed subsequent to the date hereof with the Securities and Exchange Commission pursuant to Regulation 14A in connection with the registrant’s 2024 Annual Meeting of Stockholders are incorporated by reference into Part III of this Annual Report on Form 10-K.

HALOZYME THERAPEUTICS, INC.

TABLE OF CONTENTS

		Page
	Summary of Risk Factors	3
PART I
Item 1.	Business	8
Item 1A.	Risk Factors	24
Item 1B.	Unresolved Staff Comments	41
Item 1C.	Cybersecurity	42
Item 2.	Properties	44
Item 3.	Legal Proceedings	44
Item 4.	Mine Safety Disclosures	44
PART II
Item 5.	Market For Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities	45
Item 6.	(Reserved)	47
Item 7.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	48
Item 7A.	Quantitative and Qualitative Disclosures About Market Risk	60
Item 8.	Financial Statements and Supplementary Data	60
Item 9.	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure	60
Item 9A.	Controls and Procedures	61
Item 9B.	Other Information	63
Item 9C.	Disclosure Regarding Foreign Jurisdictions that Prevent Inspections	63
PART III
Item 10.	Directors, Executive Officers and Corporate Governance	63
Item 11.	Executive Compensation	64
Item 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	64
Item 13.	Certain Relationships and Related Transactions, and Director Independence	65
Item 14.	Principal Accounting Fees and Services	65
PART IV
Item 15.	Exhibits, Financial Statement Schedules	66
Item 16.	Form 10-K Summary	70
SIGNATURES		71

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Summary of Risk Factors

Our business is subject to a number of risks and uncertainties, including those described under the heading “Risk Factors” in Part I, Item 1A of this Annual Report on Form 10-K. These risks include the following:

Risks Related To Our Business

•Failure or delay in receiving and maintaining regulatory approval for our partnered or proprietary product candidates would substantially impact our ability to generate revenues or the timing of such revenues.

•Use of our partnered or proprietary products and product candidates could be associated with adverse events.

•Disruptions in the supply of bulk rHuPH20 or other components by our manufacturers or vendors could delay or suspend development or commercialization efforts and harm our business results associated with operations and collaborations.

•Inability of third parties to perform necessary services for our products, such as distribution, invoicing and storage services could impact our business performance.

•If we or any party to a key collaboration agreement fail to perform material obligations under such agreement, or if a key collaboration agreement is terminated for any reason, our business could suffer.

•Any adverse development regarding the rHuPH20 enzyme could substantially impact multiple areas of our business, including current and potential ENHANZE collaborations and revenues, as well as any proprietary programs.

•Additional applications of our ENHANZE technology or acquiring new technologies may require the use of additional resources, result in increased expense and ultimately may not be successful.

•Our partnered or proprietary product candidates may not receive regulatory approvals or their development may be delayed which may materially adversely affect our business, financial condition and results of operations.

•Failure of our third-party partners to supply certain proprietary materials that are essential components of partnered products or product candidates could delay development and commercialization efforts and/or harm our collaborations.

•If we or our partners fail to comply with regulatory requirements applicable to promotion, sale and manufacturing of approved products, regulatory agencies may act against us or them, which could harm our business.

•Failure of our auto-injector and specialty products business to perform could adversely impact our future business and operations.

•Pandemics or similar public health crises could adversely impact our business and results of operations.

•We may need to raise additional capital in the future and there can be no assurance that we will be able to do so.

•Failure by us to fulfill obligations under our debt instruments may cause repayment obligations to accelerate.

•Conversion of our Convertible Notes may dilute the ownership interest of existing stockholders or may otherwise depress the price of our common stock or adversely affect our financial condition and operating results.

•If proprietary or partnered product candidates are approved for commercialization but do not gain market acceptance resulting in commercial performance below that which was expected or projected, our business may suffer.

•Our ability to license our ENHANZE and device technologies depends on the validity of our patents.

•Developing, manufacturing and marketing pharmaceutical products for human use involves significant product liability risks for which we may have insufficient insurance coverage.

•Failure by our partners to achieve projected development or clinical goals in the timeframes expected may delay product commercialization, which may adversely affect our business, financial condition, and results of operations.

•Future acquisitions could disrupt our business and impact our financial condition.

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•Our effective tax rate may fluctuate, and we may incur obligations in tax jurisdictions in excess of accrued amounts.

Risks Related To Ownership of Our Common Stock

•Our stock price is subject to significant volatility.

•Future transactions where we raise capital may negatively affect our stock price.

•Anti-takeover provisions in our charter documents, the Indentures and Delaware law may make an acquisition of us more difficult.

Risks Related to Our Industry

•Compliance with extensive government regulations for our and our partnered products is expensive and time consuming and may result in delay or cancellation of our or our partnered product sales, introductions or modifications.

•Because some of our and our partnered products and product candidates are considered to be drug/device combination products, the approval and post-approval requirements can be more complex.

•We may be subject to various federal and state healthcare laws, which could subject us to government investigation, litigation, and other penalties, which could adversely affect our ability to operate.

•We may be required to initiate or defend against legal proceedings related to intellectual property rights, which may result in substantial expense, delay and/or cessation of certain development and commercialization of our products.

•Off-label promotion or marketing of products inconsistent with FDA requirements could result in significant liability.

•Compliance with regulatory requirements related to controlled substances will require additional time and expenses and may subject us to additional penalties for noncompliance, which could inhibit successful commercialization.

•Changes in intellectual property laws may adversely impact our business because we may lose the ability to obtain patent protection or enforce our intellectual property rights against competitors.

•If third-party reimbursement and customer contracts are not available, our proprietary and partnered products may not be accepted in the market resulting in commercial performance below that which was expected or projected.

•Changes in private and federal reimbursement policies and practices could lower pharmaceutical product prices and decrease our revenue.

•We face competition and rapid technological change that could result in the development of products by others that are competitive with our proprietary and partnered products, including those under development.

General Risks

•If we are unable to attract, hire and retain key personnel, our business could be negatively affected.

•Our operations might be interrupted by the occurrence of a natural disaster or other catastrophic event.

•Cyberattacks, security breaches or system breakdowns may disrupt our operations and harm our operating results and reputation.

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This Annual Report on Form 10-K contains “forward-looking statements” within the meaning of the “safe harbor” within the meaning of the Private Securities Litigation Reform act of 1995, provisions of Section 21E of the Securities Exchange Act of 1934, as amended, and Section 27A of the Securities Act of 1933, as amended. All statements, other than statements of historical fact, included herein, including without limitation those regarding our future product development and regulatory events and goals, product collaborations, our business intentions and financial estimates and anticipated results, are, or may be deemed to be, forward-looking statements. Words such as “expect,” “anticipate,” “intend,” “plan,” “believe,” “seek,” “estimate,” “think,” “may,” “could,” “will,” “would,” “should,” “continue,” “potential,” “likely,” “opportunity,” “project” and similar expressions or variations of such words are intended to identify forward-looking statements, but are not the exclusive means of identifying forward-looking statements in this Annual Report on Form 10-K. Additionally, statements concerning future matters such as the development or regulatory approval of new partner products, enhancements of existing products or technologies, timing and success of the launch of new products by us and our partners, third party performance under key collaboration agreements, the ability of our bulk drug and device part manufacturers to provide adequate supply for our partners, revenue, expense, cash burn levels and our ability to make timely repayments of debt, anticipated amounts and timing of share repurchases, anticipated profitability and expected trends and other statements regarding our plans and matters that are not historical are forward-looking statements.

Although forward-looking statements in this Annual Report on Form 10-K reflect the good faith judgment of our management, such statements can only be based on facts and factors currently known by us. Consequently, forward-looking statements are inherently subject to risks and uncertainties and actual results and outcomes may differ materially from the results and outcomes discussed in or anticipated by the forward-looking statements. Factors that could cause or contribute to such differences in results and outcomes include without limitation those discussed under the heading “Risk Factors” in Part I, Item 1A, as well as those discussed elsewhere in this Annual Report on Form 10-K. Readers are urged not to place undue reliance on these forward-looking statements, which speak only as of the date of this Annual Report on Form 10-K. We undertake no obligation to revise or update any forward-looking statements in order to reflect any event or circumstance that may arise after the date of this Annual Report on Form 10-K. Readers are urged to carefully review and consider the various disclosures made in this Annual Report on Form 10-K, which attempt to advise interested parties of the risks and factors that may affect our business, financial condition, results of operations and prospects.

References to “Halozyme,” “the Company,” “we,” “our,” “ours,” and “us” refer to Halozyme Therapeutics, Inc., its wholly owned subsidiaries, Halozyme, Inc., Antares Pharma Inc., and Antares Pharma Inc.’s wholly-owned subsidiaries, Antares Pharma IPL AG and Antares Pharma AG. References to “Notes” refer to the notes to the consolidated financial statements included herein (refer to Item 8 of Part II).

PART I

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Item 1.Business

Overview

Halozyme Therapeutics, Inc. is a biopharmaceutical company advancing disruptive solutions to improve patient experiences and outcomes for emerging and established therapies.

As the innovators of ENHANZE® drug delivery technology (“ENHANZE”) with our proprietary enzyme rHuPH20, our commercially-validated solution is used to facilitate the subcutaneous (“SC”) delivery of injected drugs and fluids, with the goal of reducing the treatment burden for patients. We license our technology to biopharmaceutical companies to collaboratively develop products that combine ENHANZE with our partners’ proprietary compounds. We also develop, manufacture and commercialize, for ourselves or with our partners, drug-device combination products using our advanced auto-injector technologies that are designed to provide commercial or functional advantages such as improved convenience, reliability and tolerability, and enhanced patient comfort and adherence.

 Our ENHANZE partners’ approved products and product candidates are based on rHuPH20, our patented recombinant human hyaluronidase enzyme. rHuPH20 works by breaking down hyaluronan (“HA”), a naturally occurring carbohydrate that is a major component of the extracellular matrix of the SC space. This temporarily reduces the barrier to bulk fluid flow allowing for improved and more rapid SC delivery of high dose, high volume injectable biologics, such as monoclonal antibodies and other large therapeutic molecules, as well as small molecules and fluids. We refer to the application of rHuPH20 to facilitate the delivery of other drugs or fluids as ENHANZE. We license the ENHANZE technology to form collaborations with biopharmaceutical companies that develop or market drugs requiring or benefiting from injection via the SC route of administration. In the development of proprietary intravenous (“IV”) drugs combined with our ENHANZE technology, data have been generated supporting the potential for ENHANZE to reduce patient treatment burden, as a result of shorter duration of SC administration with ENHANZE compared to IV administration. ENHANZE may enable fixed-dose SC dosing compared to weight-based dosing typically required for IV administration, extend the dosing interval for drugs that are already administered subcutaneously and potentially allow for lower rates of infusion-related reactions. ENHANZE may enable more flexible treatment options such as home administration by a healthcare professional or potentially the patient or caregiver. Lastly, certain proprietary drugs co-formulated with ENHANZE have been granted additional exclusivity, extending the patent life of the product beyond the patent expiry of the proprietary IV drug.

We currently have ENHANZE collaborations and licensing agreements with F. Hoffmann-La Roche, Ltd. and Hoffmann-La Roche, Inc. (“Roche”), Takeda Pharmaceuticals International AG and Baxalta US Inc. (“Takeda”), Pfizer Inc. (“Pfizer”), Janssen Biotech, Inc. (“Janssen”), AbbVie, Inc. (“AbbVie”), Eli Lilly and Company (“Lilly”), Bristol Myers Squibb Company (“BMS”), argenx BVBA (“argenx”), ViiV Healthcare (the global specialist HIV Company majority owned by GlaxoSmithKline) (“ViiV”), Chugai Pharmaceutical Co., Ltd (“Chugai”) and Acumen Pharmaceuticals, Inc. (“Acumen”). In addition to receiving upfront licensing fees from our ENHANZE collaborations, we are entitled to receive event and sales-based milestone payments, revenues from the sale of bulk rHuPH20 and royalties from commercial sales of approved partner products co-formulated with ENHANZE. We currently earn royalties from four of these collaborations, including royalties from sales of one product from the Takeda collaboration, four products from the Roche collaboration, one product from the Janssen collaboration and one product from the argenx collaboration.

We have commercialized auto-injector products with several pharmaceutical companies including Teva Pharmaceutical Industries, Ltd. (“Teva”) and Otter Pharmaceuticals, LLC (“Otter”). We have development programs including auto-injectors with Idorsia Pharmaceuticals Ltd. (“Idorsia”).

Our commercial portfolio of proprietary products includes Hylenex®, utilizing rHuPH20, and our specialty product XYOSTED®, utilizing our auto-injector technology.

Our principal offices and research facilities are located at 12390 El Camino Real, San Diego, CA 92130. Our telephone number is (858) 794-8889 and our e-mail address is info@halozyme.com. Our website address is www.halozyme.com. Information found on, or accessible through, our website is not a part of, and is not incorporated into, this Annual Report on Form 10-K. Our periodic and current reports that we filed with the Securities and Exchange Commission (“SEC”) are available on our website at www.halozyme.com, free of charge, as soon as reasonably practicable after we have electronically filed such material with, or furnished them to, the SEC, including our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K and any amendments to those reports.

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Our Technology

rHuPH20 can be applied as a drug delivery platform to increase dispersion and absorption of other injected drugs and fluids, potentially reducing treatment burden. For example, rHuPH20 has been used to convert drugs that must be delivered intravenously into SC injections or to reduce the number of SC injections needed for effective therapy. When ENHANZE technology is applied subcutaneously, the rHuPH20 acts locally and transiently, with a tissue half-life of less than 30 minutes. HA at the local site reconstitutes its normal density within two days and, therefore, the effect of rHuPH20 on the architecture of the SC space is temporary.

The pressure-assisted auto-injector technology is a form of parenteral drug delivery that continues to gain acceptance and demand among the medical and patient community. Encompassing a variety of sizes and designs, our technology operates by using pressure to force the drug, in solution or suspension, through the skin and deposits the drug into the SC or intramuscular tissue. We have designed disposable, pressure-assisted auto-injector devices to address acute and chronic medical needs, such as rheumatoid arthritis and psoriasis, allergic reactions, testosterone deficiency. Our current platforms include the high-volume auto-injector, VIBEX®, VIBEX® QuickShot®, and Vai™ auto-injectors and multi-does pen injectors, Our current auto-injectors offer a dose capacity ranging from 0.5 mL to 2.25 mL, and our high-volume auto-injector technology extends that dose capacity to at least 10mL. They are designed for speed and patient comfort and accommodate for highly viscous drug products. They are customizable for fill volumes and needle lengths to meet our partners’ needs for reliability requirements, including for emergency use applications.

Our Strategy

We are a leader in converting IV biologics to SC delivery and extending the dosing interval of SC drugs, using our commercially-validated ENHANZE technology. Our ENHANZE technology also has the potential for SC delivery of small molecules and other therapeutic modalities including those developed as long-acting injectables and other therapies that might benefit from larger dose/larger volume SC delivery. We collaborate with leading pharmaceutical and biotechnology companies to help them develop products that combine our ENHANZE technology with their proprietary compounds. We target large, attractive markets, where ENHANZE-enabled SC delivery has the potential to deliver competitive differentiation and other important benefits to our partners, such as larger injection volumes administered rapidly, extended dosing intervals, and reduced treatment burden and healthcare costs. In addition, ENHANZE has been demonstrated to enable the combination of two therapeutic antibodies in a single injection, as well as the development of new co-formulation intellectual property. We leverage our strategic, technical, regulatory and alliance management skills in support of our partners' efforts to develop new SC delivered products. We currently have eleven collaborations with seven currently approved products and additional product candidates in development using our ENHANZE technology. We intend to work with our existing partners to expand our collaborations to add new targets and develop targets and product candidates under the terms of the operative collaboration agreements. We will also continue our efforts to enter into new collaborations to derive additional revenue from our proprietary technology.

We also support leading pharmaceutical companies by assisting in the development of, and supplying, auto-injector devices and auto-injector drug combination products. We leverage our engineering, regulatory and manufacturing skills to support our partners’ plans. We intend to extend the range of auto-injectors available to current and new partners. In 2023, we completed a successful Phase I clinical study using a high-volume auto-injector. It is our goal to further extend the number of partners for the current auto-injectors and add new partners for our high-volume auto-injector that utilizes our ENHANZE technology.

9

Product and Product Candidates

The following table summarizes our marketed proprietary products and product candidates under development and our marketed partnered products and product candidates under development with our partners:

10

11

Proprietary Products and Product Candidates

Hylenex Recombinant (hyaluronidase human injection)

We market and sell Hylenex recombinant which is a formulation of rHuPH20 that facilitates SC administration for achieving hydration, increases the dispersion and absorption of other injected drugs and, in SC urography, to improve resorption of radiopaque agents. Hylenex recombinant is currently the number one prescribed branded hyaluronidase.

XYOSTED (testosterone enanthate) Injection

We market and sell our proprietary product XYOSTED for SC administration of testosterone replacement therapy (“TRT”) in adult males for conditions associated with a deficiency or absence of endogenous testosterone (primary or hypogonadism). XYOSTED is the only Food and Drug Administration (“FDA”)-approved SC testosterone enanthate product for once-weekly, at-home self-administration and is approved and marketed in the United States (“U.S”). in three dosage strengths, 50 mg, 75 mg and 100 mg.

ATRS - 1902

We have an ongoing program to develop a proprietary drug device combination product for the endocrinology market, for patients who require additional supplemental hydrocortisone, identified as ATRS-1902. The development program uses a novel proprietary auto-injector platform to deliver a liquid stable formulation of hydrocortisone.

In June 2021, we submitted an investigational new drug (“IND”) application with the FDA for the initiation of a Phase 1 clinical study of ATRS-1902 for adrenal crisis rescue. The IND application included the protocol for an initial clinical study to compare the pharmacokinetics (“PK”) profile of our novel formulation of hydrocortisone versus Solu-Cortef®, which is an anti-inflammatory glucocorticoid and is the current standard of care for the management of acute adrenal crises.

In July 2021, the FDA accepted our IND for ATRS-1902 enabling us to initiate our Phase 1 clinical study. The Phase 1 clinical study, designed to evaluate the safety, tolerability and PK of a liquid stable formulation of hydrocortisone, was initiated in September 2021. The study was a cross-over design to establish the PK profile of ATRS-1902 (100 mg) compared to Solu-Cortef (100 mg), the reference-listed drug, in 32 healthy adults.

In January 2022, we announced the positive results from the Phase 1 clinical study and were granted Fast Track designation by the FDA. The positive results supported the advancement of our ATRS-1902 development program to a pivotal study for the treatment of acute adrenal insufficiency, using our Vai novel proprietary rescue pen platform to deliver a liquid stable formulation of hydrocortisone.

Partnered Products

ENHANZE Collaborations

Roche Collaboration

In December 2006, we and Roche entered into a collaboration and license agreement under which Roche obtained a worldwide license to develop and commercialize product combinations of rHuPH20 and up to twelve Roche target compounds (the “Roche Collaboration”). Under this agreement, Roche elected a total of eight targets, two of which are exclusive.

In September 2013, Roche launched a SC formulation of Herceptin (trastuzumab) (Herceptin® SC) in Europe for the treatment of patients with HER2-positive breast cancer followed by launches in additional countries. This formulation utilizes our ENHANZE technology and is administered in two to five minutes, compared to 30 to 90 minutes with the standard IV form. Herceptin SC has since received approval in Canada, the U.S. (under the brand name Herceptin Hylecta™) and China.

In June 2020, the FDA approved the fixed-dose combination of Perjeta® (pertuzumab) and Herceptin for SC injection (Phesgo®) utilizing ENHANZE technology for the treatment of patients with HER2-positive breast cancer. Phesgo has since received approval in Europe and China. In September 2023, Chugai Pharmaceuticals Co., Ltd (a Member of the Roche Group) announced that it had obtained regulatory approval for Phesgo from the Ministry of Health, Labour and Welfare (“MHLW”) in Japan. We will receive royalties for Phesgo sales in Japan as part of our licensing agreement with Roche.

In June 2014, Roche launched MabThera® SC in Europe for the treatment of patients with common forms of non-Hodgkin lymphoma (“NHL”), followed by launches in additional countries. This formulation utilizes our ENHANZE technology and is administered in approximately five minutes compared to the approximate 1.5 to 4 hour IV infusion. In May 2016, Roche announced that the European Medicines Agency (“EMA”) approved MabThera SC to treat patients with chronic lymphocytic leukemia (“CLL”). In June 2017, the FDA-approved Genentech’s RITUXAN HYCELA®, a combination of rituximab using ENHANZE technology (approved and marketed under the MabThera SC brand in countries outside the U.S. and Canada), for CLL and two types of NHL, follicular lymphoma and diffuse large B-cell lymphoma. In March 2018, Health Canada approved

12

a combination of rituximab and ENHANZE (approved and marketed under the brand name RITUXAN® SC) for patients with CLL. In November 2022, Roche submitted the independent medical assessment (“IMA”) for MabThera SC to the Center for Drug Evaluation (“CDE”) in China.

In September 2017 and October 2018, we entered into agreements with Roche to develop and commercialize additional exclusive targets using ENHANZE technology. The upfront license payment may be followed by event-based payments subject to Roche’s achievement of specified development, regulatory and sales-based milestones. In addition, Roche will pay royalties to us if products under the collaboration are commercialized.

In December 2018, Roche initiated a Phase 1b/2 study in patients with non-small cell lung cancer (“NSCLC”) for TECENTRIQ® (atezolizumab) using ENHANZE technology, followed by initiation of a Phase 3 study in December 2020. In August 2022, Roche announced that the Phase 3 study met its co-primary endpoints showing non-inferior levels of Tecentriq in the blood PK, when injected subcutaneously, compared with IV infusion, in cancer immunotherapy-naïve patients with advanced or metastatic NSCLC for whom prior platinum therapy has failed. The safety profile of the SC formulation was consistent with that of IV Tecentriq. In August 2023, Roche announced the approval of Tecentriq SC with ENHANZE by the Medicines and Healthcare products Regulatory Agency (“MHRA”) in Great Britain. In January 2024, Roche received European Commission (“EC”) marketing authorization for Tecentriq SC for all approved indications of Tecentriq IV. Roche is expecting Tecentriq SC approval in the U.S. in September 2024 and is planning to launch soon after. Tecentriq SC enables SC delivery in approximately seven minutes, compared with 30-60 minutes for IV infusion.

In August 2019, Roche initiated a Phase 1 study evaluating ocrelizumab SC with ENHANZE technology in subjects with multiple sclerosis, followed by initiation of a Phase 3 study in April 2022. In July 2023, Roche announced that the Phase III OCARINA II trial evaluating ocrelizumab SC with ENHANZE as a twice a year 10-minute SC injection met its primary and secondary endpoints in patients with relapsing forms of multiple sclerosis (“MS”) or primary progressive MS (“RMS” or “PPMS”). Subsequently, Roche filed ocrelizumab SC with ENHANZE with regulatory authorities in the EU, United Kingdom (“UK”) and the U.S.

In October 2019, Roche nominated a new undisclosed exclusive target to be studied using ENHANZE technology. In November 2021, Roche initiated a Phase 1 study with the undisclosed target and ENHANZE.

Takeda Collaboration

In September 2007, we and Takeda entered into a collaboration and license agreement under which Takeda obtained a worldwide, exclusive license to develop and commercialize product combinations of rHuPH20 with GAMMAGARD LIQUID (HYQVIA®) (the “Takeda Collaboration”). HYQVIA is indicated for the treatment of primary immunodeficiency disorders associated with defects in the immune system.

In May 2013, the EC granted Takeda marketing authorization in all EU Member States for the use of HYQVIA as replacement therapy for adult patients with primary and secondary immunodeficiencies. Takeda launched HYQVIA in the first EU country in July 2013 and has continued to launch in additional countries. In May 2016, Takeda announced that HYQVIA received a marketing authorization from the EC for a pediatric indication.

In September 2014, HYQVIA was approved by the FDA for treatment of adult patients with primary immunodeficiency in the U.S. HYQVIA is the first SC immune globulin (“IG”) treatment approved for adult primary immunodeficiency patients with a dosing regimen requiring only one infusion up to once per month (every three to four weeks) and one injection site per infusion in most patients, to deliver a full therapeutic dose of IG.

In September 2020, Takeda announced that the EMA approved a label update for HYQVIA broadening its use and making it the first and only facilitated SC immunoglobulin replacement therapy in adults, adolescents and children with an expanded range of secondary immunodeficiencies (“SID”).

In October 2021, Takeda initiated a Phase 1 single-dose, single-center, open-label, three-arm study to assess the tolerability and safety of immune globulin SC (human), 20% solution with ENHANZE (TAK-881) at various infusion rates in healthy adult subjects. In October 2023, Takeda initiated a Phase 2/3 study to evaluate PK, safety, and tolerability of subcutaneous administration of TAK-881 in adult and pediatric participants with Primary Immunodeficiency Diseases (“PIDD”).

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In July 2022, Takeda announced positive topline results from pivotal Phase 3 trial evaluating HYQVIA, for maintenance treatment of chronic inflammatory demyelinating polyneuropathy (“CIDP”). In June 2023, Takeda announced positive full results from a pivotal Phase 3 trial evaluating HYQVIA for maintenance treatment of CIDP and confirmed regulatory applications were under review in the U.S. and EU for HYQVIA use as a maintenance therapy in adults with stable CIDP. In January 2024, Takeda received FDA and EC approval for HYQVIA for the treatment of CIDP as maintenance therapy to prevent the relapse of neuromuscular disability and impairment in adults.

In April 2023, Takeda announced that the FDA-approved the supplemental Biologics License Application (“sBLA”) to expand the use of HYQVIA to treat primary immunodeficiency in children. In February 2024, Takeda submitted a New Drug Application in Japan seeking approval for TAK-771, subcutaneous 10% human immunoglobulin with ENHANZE, for treatment of primary immunodeficiency.

Pfizer Collaboration

In December 2012, we and Pfizer entered into a collaboration and license agreement, under which Pfizer has the worldwide license to develop and commercialize products combining our rHuPH20 enzyme with Pfizer proprietary biologics in primary care and specialty care indications. Pfizer has elected five targets and has returned two targets.

Janssen Collaboration

In December 2014, we and Janssen entered into a collaboration and license agreement, under which Janssen has the worldwide license to develop and commercialize products combining our rHuPH20 enzyme with Janssen proprietary biologics directed to up to five targets. Targets may be selected on an exclusive basis. Janssen elected CD38 and initiated several Phase 3 studies, Phase 2 studies and Phase 1 studies of DARZALEX® (daratumumab), directed at CD38, using ENHANZE technology in patients with amyloidosis, smoldering myeloma and multiple myeloma.

In May 2020, Janssen launched the commercial sale of DARZALEX FASPRO® (DARZALEX utilizing ENHANZE technology) in four regimens across five indications in multiple myeloma patients, including newly diagnosed, transplant-ineligible patients as well as relapsed or refractory patients. As a fixed-dose formulation, DARZALEX FASPRO can be administered over three to five minutes, significantly less time than DARZALEX IV which requires multi-hour infusions. In June 2020, we announced that Janssen received European marketing authorization and launched the commercial sale of DARZALEX SC utilizing ENHANZE in the EU. Subsequent to these approvals, Janssen received several additional regulatory approvals for additional indications and patient populations in the U.S., EU, Japan and China. Beginning with the U.S., Janssen has marketing authorization for DARZALEX FASPRO in combination with bortezomib, thalidomide, and dexamethasone in newly diagnosed multiple myeloma patients who are eligible for autologous stem cell transplant, in combination with bortezomib, cyclophosphamide and dexamethasone (“D-VCd”) for the treatment of adult patients with newly diagnosed AL amyloidosis, in combination with pomalidomide and dexamethasone (“D-Pd”) for patients with multiple myeloma after first or subsequent relapse, and in combination with Kyprolis® (carfilzomib) and dexamethasone for patients with relapsed or refractory multiple myeloma who have received one to three prior lines of therapy. In the EU, Janssen has marketing authorization for DARZALEX SC in combination with D-VCd in newly diagnosed adult patients with AL amyloidosis and in combination with D-Pd in adult patients with relapsed or refractory multiple myeloma. In Japan, Janssen has marketing authorization for the SC formulation of DARZALEX (known as DARZQURO in Japan) for the treatment of multiple myeloma and systemic AL amyloidosis. In China, Janssen has marketing authorization for DARZALEX SC for the treatment of primary light chain amyloidosis, in combination with D-VCd in newly diagnosed patients. In January 2024, Janssen announced submission of a sBLA to the FDA seeking approval of a new indication for DARZALEX FASPRO in combination with bortezomib, lenalidomide and dexamethasone (“D-VRd”) for induction and consolidation treatment and with lenalidomide (“D-R”) for maintenance treatment of adult patients who are newly diagnosed with multiple myeloma (“NDMM”) and are eligible for autologous stem cell transplant (“ASCT”).

In December 2019, Janssen elected EGFR and cMET as a bispecific antibody (amivantamab) target on an exclusive basis, which is being studied in solid tumors. In September 2022, following a Phase 1 study, Janssen initiated a Phase 3 study of lazertinib and amivantamab with ENHANZE in patients with epidermal growth factor receptor (“EGFR”)-mutated advanced or metastatic non-small cell lung cancer (PALOMA-3). In November 2022, Janssen initiated a Phase 2 study of amivantamab with ENHANZE in multiple regimens in patients with advanced or metastatic solid tumors including EGFR-mutated non-small cell lung cancer (PALOMA-2). In January 2024, Janssen noted its intention to submit applications in the U.S. and EU seeking approval of a SC formulation for amivantamab SC during 2024.

In July 2021, Janssen elected the target HIV reverse transcriptase limited to non-nucleoside reverse transcriptase inhibitors. In December 2021, Janssen initiated a Phase 1 clinical trial combining rilpivirine and ENHANZE. In 2023, Janssen discontinued the rilpivirine program with ENHANZE.

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AbbVie Collaboration

In June 2015, we and AbbVie entered into a collaboration and license agreement, under which AbbVie has the worldwide license to develop and commercialize products combining our rHuPH20 enzyme with AbbVie proprietary biologics directed to up to nine targets. Targets may be selected on an exclusive basis.

Lilly Collaboration

In December 2015, we and Lilly entered into a collaboration and license agreement, under which Lilly has the worldwide license to develop and commercialize products combining our rHuPH20 enzyme with Lilly proprietary biologics. Lilly currently has the right to select up to three targets. Targets may be selected on an exclusive basis. Lilly has elected two targets on an exclusive basis and one target on a semi-exclusive basis.

BMS Collaboration

In September 2017, we and BMS entered into a collaboration and license agreement, which became effective in November 2017, under which BMS had the worldwide license to develop and commercialize products combining our rHuPH20 enzyme with BMS products directed at up to eleven targets. Targets may be selected on an exclusive basis or non-exclusive basis. BMS has designated multiple immuno-oncology targets including programmed death 1 (“PD-1”) and has an option to select three additional targets by November 2024. In October 2019, BMS initiated a Phase 1 study of relatlimab, an anti-LAG-3 antibody, in combination with nivolumab using ENHANZE technology. In May 2021, BMS initiated a Phase 3 of nivolumab using ENHANZE technology for patients with advanced or metastatic clear cell renal cell carcinoma (CheckMate-67T), leveraging data and insights from Phase 1/2 CA209-8KX study in patients with solid tumors. In October 2023, BMS reported positive top-line data from the Phase 3 CheckMate-67T trial evaluating a SC formulation of Opdivo (nivolumab) with ENHANZE in patients with advanced or metastatic clear cell renal cell carcinoma (“ccRCC”) who have received prior systemic therapy. The study met its co-primary PK endpoints and a key secondary endpoint.

In June 2022, BMS nominated an undisclosed target, which was returned in January 2024. In March 2023, BMS initiated a Phase 3 trial to demonstrate the drug exposure levels of nivolumab and relatlimab fixed-dose combination with ENHANZE is not inferior to IV administration in participants with previously untreated metastatic or unresectable melanoma (RELATIVITY-127).

Alexion Collaboration

In December 2017, we and Alexion entered into a collaboration and license agreement (“CLA”), under which Alexion has the worldwide license to develop and commercialize products combining our rHuPH20 enzyme with Alexion’s portfolio of products directed at up to four exclusive targets. Alexion notified us of a discontinuation of our CLA, effective in the first quarter of 2024.

argenx Collaboration

In February 2019, we and argenx entered into an agreement for the right to develop and commercialize one exclusive target, the human neonatal Fc receptor FcRn, which includes argenx’s lead asset efgartigimod (ARGX-113), and an option to select two additional targets using ENHANZE technology. In May 2019, argenx nominated a second target to be studied using ENHANZE technology, a human complement factor C2 associated with the product candidate ARGX-117, which is being developed to treat severe autoimmune diseases in Multifocal Motor Neuropathy (“MMN”). In October 2020, we and argenx entered into an agreement to expand the collaboration relationship, adding three targets for a total of up to six targets under the collaboration.

In December 2021, argenx announced the FDA approval of efgartigimod (VYVGARTTM) for the treatment of generalized myasthenia gravis (“gMG”) for the IV dosing regimen. In March 2022, argenx announced that data from argenx’s phase 3 ADAPT-SC study evaluating SC efgartigimod utilizing ENHANZE (1000mg efgartigimod-PH20) for the treatment of gMG achieved the primary endpoint of total IgG reduction from baseline at day 29, demonstrating statistical non-inferiority to VYVGART (efgartigimod alfa-fcab) IV formulation in gMG patients.

In June 2023, argenx received FDA approval under the brand name VYVGART® Hytrulo for the injection with ENHANZE for SC use of treatment of gMG in adult patients who are anti-acetylcholine receptor (“AChR”) antibody positive. In November 2023, argenx received EC approval of VYVGART SC for the treatment of gMG, which also provides the option for patient self-administration. In January 2024, argenx received Japan approval for VYVDURA® (efgartigimod alfa and hyaluronidase-qvfc) co-formulated with ENHANZE for the treatment of adult patients with gMG including options for self-administration. argenx also expects the regulatory decision on approval of VYVGART SC for gMG in China through Zai Lab by the end of 2024.

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In July 2023, argenx reported positive data from the ADHERE study evaluating VYVGART® Hytrulo with ENHANZE in adults with CIDP. In February 2024, argenx announced that the FDA had accepted for priority review a sBLA for VYVGART Hytrulo for the treatment of CIDP. The application has been granted a Prescription Drug User Fee Act (“PDUFA”) action date of June 21, 2024. argenx also expects to submit VYVGART SC for CIDP for regulatory approval in Japan, Europe, China and Canada in 2024. In September 2023, Zai Lab limited (argenx commercial partner for China) announced the CDE of the National Medical Products Administration (“NMPA”) granted Breakthrough Therapy Designation for efgartigimod SC for the treatment of patients with CIDP.

In November 2023, argenx reported that the ADVANCE-SC study, evaluating VYVGART® Hytrulo in adults with primary immune thrombocytopenia (“ITP”) did not meet the primary endpoint of a sustained platelet count response in chronic ITP patients. In December 2023, argenx reported that the ADDRESS study, evaluating efgartigimod SC in adults with pemphigus vulgaris (“PV”) and pemphigus foliaceus (“PF”) resulted in the proportion of PV patients achieving the primary endpoint of complete remission on a minimal dose of steroids (“CRmin”) was not significantly different between efgartigimod SC and the control arm. In both studies, patients treated with Efgartigimod PH20 SC achieved the same magnitude of total Immunoglobulin G (“IgG”) reduction as observed in previous clinical trials, reflecting no impact of the route of administration on the study results. argenx will not pursue additional development in pemphigus.

argenx is currently conducting a Phase 2 study of ARGX-113 (ALKIVIA) using ENHANZE technology for patients with active idiopathic inflammatory myopathy (Myositis) and another study, BALLAD, evaluating ARGX -113 using ENHANZE in bullous pemphigoid. argenx intends to initiate a registrational trial of ARGX-113 using ENHANZE technology for patients with thyroid eye disease in 2024.

Horizon Collaboration

In November 2020, we and Horizon entered into a global collaboration and license agreement that gives Horizon exclusive access to ENHANZE technology for SC formulation of medicines targeting IGF-1R. Horizon intends to use ENHANZE to develop a SC formulation of TEPEZZA® (teprotumumab-trbw), indicated for the treatment of thyroid eye disease, a serious, progressive and vision-threatening rare autoimmune disease, potentially shortening drug administration time, reducing healthcare practitioner time and offering additional flexibility and convenience for patients. In March 2021, Horizon completed dosing in a Phase 1 study exploring the SC formulation of TEPEZZA®. The trial was a small, single-dose Phase 1 PK trial which included evaluation of ENHANZE technology for a SC formulation. In March 2022, Horizon announced the completion of a Phase 1 trial for the TEPEZZA® SC program. In October 2023, Horizon became an affiliated entity of Amgen Inc. Horizon noticed a return of the target and discontinuation of our CLA, effective in the second quarter of 2024.

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ViiV Healthcare Collaboration

In June 2021, we and ViiV entered into a global collaboration and license agreement that gives ViiV exclusive access to our ENHANZE technology for four specific small and large molecule targets for the treatment and prevention of HIV. These targets are integrase inhibitors, reverse transcriptase inhibitors limited to nucleoside reverse transcriptase inhibitors (“NRTI”) and nucleoside reverse transcriptase translocation inhibitors (“NRTTIs”), capsid inhibitors and broadly neutralising monoclonal antibodies (“bNAbs”), that bind to the gp120 CD4 binding site. In December 2021, ViiV initiated enrollment of a Phase 1 study to evaluate cabotegravir administered subcutaneously with ENHANZE. In February 2022, ViiV initiated enrollment of a Phase 1 study to evaluate the safety and PKs of N6LS, a broadly neutralizing antibody, administered subcutaneously with ENHANZE technology. In June 2022, ViiV initiated enrollment of a Phase 1 single dose escalation study to evaluate PKs, safety and tolerability of long-acting cabotegravir administered subcutaneously with ENHANZE technology. In August 2023, ViiV initiated a Phase 2b study to evaluate the efficacy, safety, PKs and tolerability of VH3810109 (N6LS) administered subcutaneously with rHuPH20 in combination with cabotegravir. In the third quarter of 2023, ViiV initiated a Phase 1 study with ENHANZE for an undisclosed program.

Chugai Collaboration

In March 2022, we and Chugai entered into a global collaboration and license agreement that gives Chugai exclusive access to ENHANZE technology for an undisclosed target. Chugai intends to explore the potential use of ENHANZE for a Chugai drug candidate. In May 2022, Chugai initiated a Phase 1 study to evaluate the PKs, pharmacodynamics, and safety of targeted antibody administered subcutaneously with ENHANZE.

Acumen Collaboration

In November 2023, we and Acumen entered into a global collaboration and non-exclusive license agreement that provides Acumen access to ENHANZE for a single target. Acumen intends to explore the potential use of ENHANZE for ACU193, Acumen’s clinical stage monoclonal antibody candidate to target Amyloid-β Oligomers for the treatment of early Alzheimer’s disease.

Device and Other Drug Product Collaborations

Teva License, Development and Supply Agreements

In July 2006, we entered into an exclusive license, development and supply agreement with Teva for an epinephrine auto- injector product to be marketed in the U.S. and Canada. We are the exclusive supplier of the device, which we developed, for Teva’s generic Epinephrine Injection USP products, indicated for emergency treatment of severe allergic reactions including those that are life threatening (anaphylaxis) in adults and certain pediatric patients. Teva’s Epinephrine Injection, utilizing our patented VIBEX® injection technology, was approved by the FDA as a generic drug product with an AB rating, meaning that it is therapeutically equivalent to the branded products EpiPen® and EpiPen Jr® and therefore, subject to state law, substitutable at the pharmacy.

In December 2007, we entered into a license, development and supply agreement with Teva under which we developed and supply a disposable pen injector for teriparatide. Under the agreement, we received an upfront payment and development milestones, and are entitled to receive royalties on net product sales by Teva in territories where commercialized.

We are the exclusive supplier of the multi-dose pen, which we developed, used in Teva’s generic teriparatide injection product. In 2020, Teva launched Teriparatide Injection, the generic version of Eli Lilly’s branded product Forsteo® featuring our multi-dose pen platform, for commercial sale in several countries outside of the U.S. In November 2023, Teva announced FDA approval of the generic version of Forteo, featuring our multi-dose auto-injector pen platform for the treatment of osteoporosis among certain women and men.

Pfizer Agreement

In August 2018, we entered into a development agreement with Pfizer to jointly develop a combination drug device rescue pen utilizing the QuickShot auto-injector and an undisclosed Pfizer drug. Pfizer has provided the intellectual property rights for further development of the product to us and has retained an option to assist in the marketing, distribution and sale if we complete development of the product and submit for regulatory approval. We are continuing to evaluate the next steps for this program.

Idorsia Agreement

In November 2019, we entered into a global agreement with Idorsia to develop a novel, drug-device product containing selatogrel. A new chemical entity, selatogrel is being developed for the treatment of a suspected acute myocardial infarction (“AMI”) in adult patients with a history of AMI.

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In January 2024, Idorsia disclosed that recruitment of their Phase 3 study with selatogrel for acute myocardial infarction had reached more than 5,500 patients.

Otter Agreement

In December 2021, we entered into a supply agreement with Otter to manufacture the VIBEX auto-injection system device, designed and developed to incorporate a pre-filled syringe for delivery of methotrexate, assemble, package, label and supply the final OTREXUP product and related samples to Otter at cost plus mark-up. Otter is responsible for manufacturing, formulation and testing of methotrexate and the corresponding pre-filled syringe for assembly with the device manufactured by us, along with the commercialization and distribution of OTREXUP. OTREXUP is a SC methotrexate injection for once weekly self-administration with an easy-to-use, single dose, disposable auto injector, indicated for adults with severe active rheumatoid arthritis (“RA”), children with active polyarticular juvenile idiopathic arthritis and adults with severe recalcitrant psoriasis. Further, we entered into a license agreement with Otter in which we granted Otter a worldwide, exclusive, fully paid-up license to certain patents relating to OTREXUP that may also relate to our other products for Otter to commercialize and otherwise exploit OTREXUP in the field as defined in the license agreement.

For a further discussion of the collaboration agreements, refer to Note 2, Summary of Significant Accounting Policies - Revenues under Collaborative Agreements.

Patents and Intellectual Proprietary Rights

Patents and other intellectual proprietary rights are essential to our business. Our success will depend in part on our ability to obtain patent protection for our inventions, to preserve our trade secrets and to operate without infringing the proprietary rights of third parties. Our strategy is to actively pursue patent protection in the U.S. and certain foreign jurisdictions for technology that we believe to be proprietary to us and that offers us a potential competitive advantage.

Halozyme Patent Portfolio

Our Halozyme patent portfolio includes patents we own solely and, in some cases, jointly with several licensees in the U.S., Europe and other countries in the world and we also have numerous pending patent applications. In general, patents have a term of 20 years from the application filing date or earlier claimed priority date. We continue to file and prosecute patent applications to strengthen and grow our patent portfolio pertaining to our recombinant human hyaluronidase and other drugs and drug delivery devices, which cover primarily compositions of matter, formulations, methods of use and manufacture, and devices. We have multiple patents and patent applications throughout the world pertaining to our recombinant human hyaluronidase and methods of use and manufacture, including an issued U.S. patent which expires in 2027, an issued European patent which expires in 2024, and additional patents that are valid into 2029, which we believe cover the products and product candidates under our existing collaborations and Hylenex recombinant. In addition, we have, under prosecution throughout the world, multiple patent applications that relate specifically to individual product candidates under development, and jointly owned patent applications relating to our collaborations with several licensees (including, but not limited to, patent applications covering co-formulations and methods of treatment or use that if granted will be valid into the 2040s), the expiration of which can only be definitely determined upon maturation into our issued patents. We believe our patent filings represent a barrier to entry for potential competitors looking to utilize these hyaluronidases, other drugs and drug delivery devices.

Other Proprietary Rights

In addition to patents, we rely on trade secrets, proprietary know-how, regulatory exclusivities and continuing technological innovation to protect our products and technologies. We protect our trade secrets, proprietary know-how and innovation, in part, by maintaining physical security of our sites and electronic security of our information technology systems and utilizing confidentiality and proprietary information agreements. Our policy is to require our employees, directors, consultants, advisors, partners, outside scientific partners and sponsored researchers, other advisors and other individuals and entities to execute confidentiality agreements upon the start of employment, consulting or other contractual relationships with us. These agreements provide that all confidential information developed or made known to the individual or entity during the course of the relationship is to be kept confidential and not disclosed to third parties except in specific circumstances. In the case of employees and some other parties, the agreements provide that all discoveries and inventions conceived by the individual will be our exclusive property. In certain instances, partners with which we have entered into development agreements may have rights to certain technology developed in connection with such agreements. Despite the use of these agreements and our efforts to protect our intellectual property, there is a risk of unauthorized use or disclosure of information. Furthermore, our trade secrets may otherwise become known to, or underlying technology may be independently developed by, our competitors.

We also file trademark applications to protect the names of our products and product candidates. These applications may not mature to registration and may be challenged by third parties. We are pursuing trademark protection in a number of different countries around the world.

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Research and Development Activities

Our research and development expenses consist primarily of costs associated with the product development, quality and regulatory work required to maintain the ENHANZE platform, expenses associated with testing of new high-volume auto-injectors, activities and support for our partners in their development and manufacturing of product candidates performed on behalf of our partners, compensation and other expenses for research and development personnel, supplies and materials, facility costs and amortization and depreciation. We charge all research and development expenses to operations as they are incurred.

Manufacturing

ENHANZE

We do not have our own manufacturing facility for our product and our partners’ products and product candidates, or the capability to package our products. We have engaged third parties to manufacture bulk rHuPH20 and Hylenex.

We have existing supply agreements with contract manufacturing organizations Avid Bioservices, Inc. (“Avid”) and Catalent Indiana LLC (“Catalent”) to produce supplies of bulk rHuPH20. These manufacturers each produce bulk rHuPH20 under current Good Manufacturing Practices (“cGMP”) for clinical and commercial uses. Catalent currently produces bulk rHuPH20 for use in Hylenex and collaboration products and product candidates. Avid currently produces bulk rHuPH20 for use in collaboration products and product candidates. We rely on their ability to successfully manufacture these batches according to product specifications. It is important for our business for Catalent and Avid to (i) retain their status as cGMP-approved manufacturing facilities; (ii) successfully scale up bulk rHuPH20 production; and/or (iii) manufacture the bulk rHuPH20 required by us and our partners for use in our proprietary and collaboration products and product candidates. In addition to supply obligations, Avid and Catalent also provide support for data and information used in the chemistry, manufacturing and controls (“CMC”) sections for FDA and other regulatory filings.

We have a commercial manufacturing and supply agreement with Patheon Manufacturing Services, LLC (“Patheon”) under which Patheon will provide the final fill and finishing steps in the production process of Hylenex recombinant.

Devices

We also use third parties to manufacture our auto-injector technology products and product candidates, including the products and related components we supply to our partners. For our products and product candidates, we verify that they are manufactured in accordance with FDA’s cGMPs for drug products and the FDA’s current Quality System Regulations (“QSRs”) for medical devices and equivalent provisions in the EU and elsewhere, which are required as part of the overall obligations necessary, in the EU for instance, to obtain a CE-mark. We enter into quality agreements with our third-party manufacturers which require compliance with cGMPs, QSRs and foreign equivalents, to the extent applicable. We use third-party service providers to assemble and package our products and product candidates under our direction. We monitor and evaluate manufacturers and suppliers to assess compliance with regulatory requirements and our internal quality standards and benchmarks. We perform quality reviews of manufacturing for all of our product candidates and products, and quality releases for all of our product candidates and products that we sponsor or commercialize.

We use third-party manufacturers to manufacture and supply certain components, drugs, final assembly and finished product. Below is a summary of our key production, manufacturing, assembly and packaging arrangements with third-party manufacturers for products commercialized by us and our partners:

•Phillips-Medisize Corporation (“Phillips”), an international outsource provider of design and manufacturing services, produces commercial quantities of components of our QuickShot auto-injector device for XYOSTED and our VIBEX epinephrine auto-injector product with Teva.

•ComDel Innovation, Inc. (“ComDel”), a domestic provider of integrated solutions for product development, tooling, and manufacturing, produces commercial quantities of components for the VIBEX teriparatide auto-injector product with Teva and the VIBEX auto-injector device for the OTREXUP product for Otter.

•Jabil Healthcare, an international manufacturing development company, produces commercial quantities of components of our VIBEX auto-injector device for the OTREXUP product for Otter and the VIBEX epinephrine auto-injector product with Teva.

•Fresenius Kabi supplies commercial quantities of pre-filled syringes of testosterone for XYOSTED.

•Sharp Corporation (“Sharp”), an international contract packaging company, assembles and packages XYOSTED auto-injector products and the OTREXUP auto-injector product for Otter.

In addition, our Minnetonka, Minnesota facility supports our administrative functions, product development and quality operations and provides additional assembling and warehousing capabilities.

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Sales, Marketing and Distribution

We have two teams of sales specialists, one that provide hospital and surgery center customers with the information needed to obtain formulary approval for, and support utilization of, Hylenex recombinant and one that supports the promotion of our testosterone product XYOSTED. Our commercial activities also include marketing and related services and commercial support services such as commercial operations, managed markets and commercial analytics. We also employ third-party vendors, such as advertising agencies, market research firms and suppliers of marketing and other sales support related services to assist with our commercial activities.

We sell XYOSTED and Hylenex recombinant in the U.S. to wholesale pharmaceutical distributors, who sell Hylenex to hospitals and XYOSTED to other end-user customers. We engage Integrated Commercialization Solutions (“ICS”), a division of AmerisourceBergen Specialty Group, a subsidiary of AmerisourceBergen, to act as our exclusive distributor for commercial shipment and distribution of Hylenex recombinant to our customers in the U.S. We also contract with numerous wholesale distributors, including Cardinal, McKesson Corporation (“McKesson”) and AmerisourceBergen Corporation to distribute XYOSTED, to retail pharmacies as well as the Veterans Administration and other governmental agencies.

In addition to shipping and distribution services, these distributors and third-party logistics providers, Cardinal Health 105, Inc., also known as Specialty Pharmaceutical Services (“Cardinal”), and Knipper Health, Inc. (“Knipper”) provide us with other key services related to logistics, warehousing, returns and inventory management, sales reports, contract administration and chargebacks processing and accounts receivable management. We also use a division of Cardinal and Knipper for sample administration. In addition, we utilize these third parties to perform various other services for us relating to regulatory monitoring, including call center management, adverse event reporting, safety database management and other product maintenance services. In exchange for these services, we pay fees to certain distributors based on a percentage of wholesale acquisition cost. We have also contracted with several specialty pharmacies to support fulfillment of certain prescriptions. In addition, we use third parties to perform various other services for us relating to regulatory monitoring, including adverse event reporting, safety database management and other product maintenance services.

Competition

The pharmaceutical industry is characterized by rapidly advancing technologies, intense competition and a strong emphasis on proprietary therapeutics. We face competition from a number of sources, some of which may target the same indications as our product or product candidates, including large pharmaceutical companies, smaller pharmaceutical companies, biotechnology companies, academic institutions, government agencies and private and public research institutions, many of which have greater financial resources, drug development experience, sales and marketing capabilities, including larger, well established sales forces, manufacturing capabilities, experience in obtaining regulatory approvals for product candidates and other resources than us.

ENHANZE

Our ENHANZE technology may face increasing competition from alternate approaches and/or emerging technologies to deliver medicines SC. In addition, our partners face competition in the commercialization of the product candidates for which the partners seek marketing approval from the FDA and other regulatory authorities.

Hylenex Recombinant

Hylenex recombinant is currently the only FDA-approved recombinant human hyaluronidase on the market. The competitors for Hylenex recombinant include Amphastar Pharmaceuticals, Inc.’s product, Amphadase®, a bovine (bull) hyaluronidase.

XYOSTED

In the U.S., there are several different formulations for TRT including intramuscular injection, transdermal patches and gels, oral formulations and nasal gels. Potential competition in the U.S. testosterone replacement market includes transdermal solutions such as AbbVie’s Androgel® 1% and 1.62%, Perrigo’s generic Androgel® Topical Gel 1.62%, Eli Lilly’s Axiron®, Endo’s Testim® and Fortesta® (and the authorized generic) and Verity Pharma’s TLANDO® and Natesto®. Other forms of TRT include injectables such as Endo’s Aveed®, Pfizer’s Depo®-Testosterone, and several generic oil testosterone products sold by Actavis, Sandoz, Viatris Inc., Teva and others, as well as Testopel® pellets by Endo and JATENZO®, an oral formulation, by Tolmar, and Kyzatrex, an oral formulation by Marius Pharmaceuticals.

Devices

We have a wide range of competitors depending upon the branded or generic marketplace, the therapeutic product category, and the product type, including dosage strengths and route of administration. Our competitors include established specialty pharmaceutical companies, major brand name and generic manufacturers of pharmaceuticals such as Teva, Viatris, Eli

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Lilly and Endo, as well as a wide range of medical device companies that sell a single or limited number of competitive products or participate in only a specific market segment. Our competitors also include third party contract medical device design and development companies such as Scandinavian Health Ltd., Ypsomed AG, West Pharmaceutical and Owen Mumford Ltd. Many of our competitors have greater financial and other resources than we have, such as more commercial resources, larger research and development staffs and more extensive marketing and manufacturing organizations. Smaller or early stage emerging companies may also prove to be significant competitors, particularly through collaborative arrangements with large, established companies.

Government Regulations

The FDA and comparable regulatory agencies in foreign countries regulate the manufacture and sale of the pharmaceutical products that we or our partners have developed or that our partners currently are developing. The FDA has established guidelines and safety standards that are applicable to the laboratory and preclinical evaluation and clinical investigation of therapeutic products and stringent regulations that govern the manufacture and sale of these products. The process of obtaining regulatory approval for a new therapeutic product usually requires a significant amount of time and substantial resources.

Regulatory obligations continue post-approval and include the reporting of adverse events when a drug is utilized in the broader patient population. Promotion and marketing of drugs is also strictly regulated, with penalties imposed for violations of FDA regulations, the Lanham Act and other federal and state laws, including the federal anti-kickback statute.

We currently intend to continue to seek, through our partners, approval to market products and product candidates in foreign countries, which may have regulatory processes that differ materially from those of the FDA. Our partners may rely upon independent consultants to seek and gain approvals to market our proposed products in foreign countries or may rely on other pharmaceutical or biotechnology companies to license our proposed products. We cannot guarantee that approvals to market any of our partners’ products can be obtained in any country. Approval to market a product in any one foreign country does not necessarily indicate that approval can be obtained in other countries.

From time to time, legislation is drafted and introduced in Congress that could significantly change the statutory provisions governing the approval, manufacturing and marketing of drug products. In addition, FDA regulations and guidance may be revised or reinterpreted by the agency or reviewing courts in ways that may significantly affect our business and development of our partners’ product candidates and any products that we may commercialize. It is impossible to predict whether additional legislative changes will be enacted, or FDA regulations, guidance or interpretations changed, or what the impact of any such changes may be.

Information about our Executive Officers

Information concerning our executive officers, including their names, ages and certain biographical information can be found in Part III, Item 10, Directors, Executive Officers and Corporate Governance. This information is incorporated by reference into Part I of this report.

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Human Capital Management

The experience, expertise and dedication of our employees drive the progress and accomplishments of Halozyme.

As of February 12, 2024, we had 373 full-time employees. None of our employees are unionized and we believe our employee relations to be good.

Recognizing the value of our employees and the contributions they make in achieving our business objectives and overall success, we focus on creating and providing an inclusive and safe work environment where employees are respected and rewarded for their contributions, work together as one team, have opportunities to grow and develop their careers, and support the communities in which we work. We also believe this approach to human capital management is essential to attracting and retaining employees in the highly competitive biotechnology and pharmaceutical labor market. To achieve this supportive working environment, our human capital management efforts focus on:

Corporate Values and Ethics

The foundation of our human capital management strategy is contained in our corporate values statement and our Code of Conduct and Ethics (the “Code of Conduct”), both of which provide uniform guidance to all our employees regarding expectations for proper workplace behavior. Our corporate values emphasize respecting and valuing fellow team members and acting with integrity and honesty to uphold the highest ethical standards. We believe these values provide an environment in which all employees can feel proud and motivated to contribute their valued talents to achieving corporate goals and objectives. Our values also emphasize empowering employees and personal accountability as a means to fulfill our commitments to patients, partners, shareholders and each other.

Our Board of Directors adopted and regularly reviews the Code of Conduct, which applies to all of our employees, officers and directors. Adherence to the Code of Conduct helps ensure that all employees can feel a part of an organization that emphasizes adherence to laws and policies covering the industry in which we work. Our Code of Conduct also emphasizes each employee’s accountability for making decisions and taking actions in a highly ethical manner with a focus on honesty, fairness and integrity and treating all fellow employees in a respectful and inclusive manner. We have established a reporting hotline that enables employees to file anonymous reports of any suspected violations of the Code of Conduct. We believe that providing an ethical environment in which to work is vital to our efforts to attract, retain and develop our employees.

Diversity and Inclusion

We seek to build and maintain a diverse team of employees that are passionate about and committed to having a positive impact on the lives of patients and their families. We value and celebrate the unique talents, backgrounds and perspectives each employee contributes to achieving our mission and corporate objectives. In support of this philosophy, we adopted the Biotechnology Innovation Organization’s principles on workforce development, diversity and inclusion. Our diverse and inclusive culture is key to attracting, developing and retaining our talent pool within the globally competitive biotechnology industry. Our dedication to these principles has resulted in a diverse and inclusive employee base consisting of 43% female and 29% non-white/Caucasian employees as of February 12, 2024.

As an equal opportunity employer, assuring we have and maintain an inclusive work environment is a key focus area for management. We actively seek to attract and retain employees who embody and embrace inclusivity as a core value. Our recruiting team collaborates with hiring managers to find the best possible candidates with appropriate knowledge, experience and technical skills. These candidates are then carefully vetted by a range of internal stakeholders as part of diverse interview panels. We evaluate our recruitment and retention efforts based on a variety of metrics, including offer acceptance rate, time-to-hire, turnover and diversity of our employees.

Professional Development for Employees at All Levels

We are firmly committed to employee development as an essential driver of our future growth and overall success of Halozyme. We understand that high performing employees are always seeking a challenge and reaching for ways to broaden, deepen and develop their skills and grow professionally. To support our employees, we conduct an individual development plan process to give employees the opportunity and accountability to document their career goals and discuss the actions necessary to achieve those goals. We have three internal training programs: (i) our senior leader development program is focused on advancing business acumen and leadership skills, (ii) our management development program is focused on strengthening people management capabilities, and (iii) our learning and development curriculum for the entire organization is focused on personal, professional, team and leadership development opportunities and grounded in our established leadership attributes which identify the knowledge, skills, abilities and behaviors that contribute to individual and organizational performance. In addition, everyone attends or participates in compliance, harassment prevention, and safety training and we offer education assistance for college and university courses, training seminars and educational conference attendance opportunities to all employees.

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To monitor progress, we review our succession plan for key senior management positions as part of our annual talent review and identify development opportunities to help ensure potential successor readiness.

Employee Engagement

Building trust and a high performing culture is a top priority for us. We achieve this by providing a platform for employees to give feedback, collaborate on solutions, and discuss how to make changes to help improve our experience at work. Over the years, we have regularly conducted employee engagement surveys to better understand what we do well and where there are opportunities for improvement.

Based on the insights gained from past surveys, we have focused on strengthening cross-functional teamwork including how teams communicate and how we hold each other accountable. Examples of specific actions we have taken in response to employee survey feedback include all-employee trainings on cross-functional teamwork, accountability and building trust and a learning series to equip employees to give and receive constructive feedback. Our current focus, based on the latest survey, is to continue to enhance manager leadership and coaching capabilities.

We hold frequent all-employee meetings that serve as an open forum to share progress on strategy and corporate goals as well as potential at-risk areas, celebrate achievements, and share best practices and learnings. These meetings also keep employees well-informed, connected and provide them with a setting to ask questions and discuss solutions.

Management tracks and assesses retention and attrition and interviews departing employees in order to identify any addressable trends.

Compensation & Benefits

Our compensation and benefits programs, with oversight from the Compensation Committee of our Board of Directors, are designed to attract, retain and reward employees through competitive salaries, annual bonus eligibility, long-term incentive awards, an Employee Stock Purchase Plan, a 401(k) Plan, healthcare and insurance benefits, health savings and flexible spending accounts, paid time off, family leave, and employee assistance programs. Each year we conduct surveys to benchmark our salaries and benefits and confirm we are satisfied with the competitiveness of our total compensation offering. We also provide a variety of peer-to-peer and corporate recognition programs to celebrate and recognize our employees for their hard work and contributions.

Employee Health and Safety

We are committed to protecting the health and safety of our employees, visitors, clients, and the public. Health and safety practices are integrated into our business processes and align with our Corporate Environmental, Social, Governance program (“ESG”) philosophy and requirements. We maintain robust health and safety management systems and have established procedures that reduce the risk of injury and ensure compliance with applicable laws and regulations. Continuous improvement is a key component of our health and safety efforts. We establish objectives and performance targets and periodically review results both with our internal safety committee as well as at the Executive and Board level to ensure our high standards are maintained. Our leadership team is active and engaged in supporting our health and safety program. Our employees are empowered and responsible for integrating health and safety into their daily work activities and we have experienced health and safety professionals on staff to guide these efforts.

Corporate Citizenship

We believe in supporting the community in which we work and provide our employees multiple opportunities to contribute to the community, including providing company-wide community service days/volunteerism supporting:

•Patient advocacy/healthcare;

•Health disparities;

•STEM education;

•Humanitarian services (e.g., food drives, home builds, meal services);

•Environment (e.g., lagoon cleanup events, park restoration); and

•Children in underserved communities (e.g. school supply drives, holiday adopt-a-family).

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Item 1A.Risk Factors

Risks Related To Our Business

If our partnered or proprietary product candidates do not receive and maintain regulatory approvals, or if approvals are not obtained in a timely manner, such failure or delay would substantially impact our ability to generate revenues.

Approval from the FDA or equivalent health authorities is necessary to design, develop, test, manufacture and market pharmaceutical products and medical devices in the U.S. and the other countries in which we anticipate doing business have similar requirements. The process for obtaining FDA and other regulatory approvals is extensive, time-consuming, risky and costly, and there is no guarantee that the FDA or other regulatory bodies will approve any applications that may be filed with respect to any of our partnered or proprietary product candidates, or that the timing of any such approval will be appropriate for the desired product launch schedule for a product candidate. We and our partners may provide guidance as to the timing for the filing and acceptance of such regulatory approvals, but such filings and approvals may not occur when we or our partners expect, or at all. The FDA or other foreign regulatory agency may refuse or delay approval of our partnered or proprietary product candidates for failure to collect sufficient clinical or animal safety data and require additional clinical or animal safety studies which may cause lengthy delays and increased costs to our or our partners’ development programs. Any such issues associated with rHuPH20 could have an adverse impact on future development of our partners’ products which include rHuPH20, future sales of Hylenex recombinant, or our ability to maintain our existing ENHANZE collaborations or enter into new ENHANZE collaborations.

We and our partners may not be successful in obtaining approvals for any additional potential products in a timely manner, or at all.

Refer to the risk factor titled “Our partnered or proprietary product candidates may not receive regulatory approvals or their development may be delayed for a variety of reasons, including delayed or unsuccessful clinical trials, regulatory requirements or safety concerns” for additional information relating to the approval of product candidates.

Additionally, even with respect to products which have been approved for commercialization, in order to continue to manufacture and market pharmaceutical and medical device products, we or our partners must maintain our regulatory approvals. If we or any of our partners are unsuccessful in maintaining the required regulatory approvals, our revenues would be adversely affected.

Use of our partnered or proprietary products and product candidates could be associated with adverse events or product recalls.

As with most pharmaceutical and medical device products, our partnered or proprietary products and product candidates could be associated with adverse events which can vary in severity (from minor reactions to death) and frequency (infrequent to very common) or product recalls. Adverse events associated with the use of our partnered or proprietary products or product candidates may be observed at any time, including in clinical trials or when a product is commercialized, and any such adverse events may negatively affect our or our partners’ ability to obtain or maintain regulatory approval or market such products and product candidates. Adverse events such as toxicity or other safety issues associated with the use of our partnered or proprietary products and product candidates could require us or our partners to perform additional studies or halt development or commercialization of these products and product candidates or expose us to product liability lawsuits which will harm our business. For example, we experienced a clinical hold on patient enrollment and dosing in our phase 2 study of PEGPH20 in patients with PDA (a discontinued program), which was not resolved until we implemented steps to address an observed possible difference in TE event rates between the arms of the study. We or our partners may be required by regulatory agencies to conduct additional animal or human studies regarding the safety and efficacy of our pharmaceutical products or product candidates which we have not planned or anticipated. There can be no assurance that we or our partners will resolve any issues related to any product or product candidate adverse events to the satisfaction of the FDA or any regulatory agency in a timely manner or ever, which could harm our business, prospects and financial condition.

To the extent that a product fails to conform to its specifications or comply with the applicable laws or regulations, we or our partners may be required to or may decide to voluntarily recall the product or regulatory authorities may request or require that we recall a product even if there is no immediate potential harm to a patient. Any recall of our products or their components that we supply to our partners could materially adversely affect our business by rendering us unable to sell those products or components for some time and by adversely affecting our reputation. Recalls are costly and take time and effort to administer. Even if a recall only initially relates to a single product, product batch, or a portion of a batch, recalls may later be expanded to additional products or batches or we or our partners may incur additional costs and need to dedicate additional efforts to investigate and rule out the potential for additional impacted products or batches. Moreover, if any of our partners recall a product due to an issue with a product or component that we supplied, they may claim that we are responsible for such issue and may seek to recover the costs related to such recall or be entitled to certain contractual remedies from us. Recalls may further result in decreased demand for our partnered or proprietary products, could cause our partners or distributors to return

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products to us for which we may be required to provide refunds or replacement products, or could result in product shortages. Recalls may also require regulatory reporting and prompt regulators to conduct additional inspections of our or our partners’ or contractors’ facilities, which could result in findings of noncompliance and regulatory enforcement actions. A recall could also result in product liability claims by individuals and third-party payers. In addition, product liability claims or other safety issues could result in an investigation of the safety or efficacy of our products, our manufacturing processes and facilities, or our marketing programs conducted by the FDA or the authorities of the EU member states and other jurisdictions. Such investigations could also potentially lead to a recall of our products or more serious enforcement actions, limitations on the indications for which they may be used, or suspension, variation, or withdrawal of approval. Any such regulatory action by the FDA, the EMA or the competent authorities of the EU member states could lead to product liability lawsuits as well.

If our contract manufacturers or vendors are unable or unwilling for any reason to manufacture and supply to us bulk rHuPH20 or other raw materials, reagents, components or devices in the quantity and quality required by us or our partners for use in the production of our proprietary or partnered products and product candidates, our and our partners’ product development and commercialization efforts could be delayed or stopped and our business results associated with operations and our collaborations could be harmed.

We rely on a number of third parties in our supply chain for the supply and manufacture of our partnered and proprietary products, and the availability of such products depends upon our ability to procure the raw materials, components, packaging materials and finished products from these third parties, some of which are currently our single source for the materials necessary for certain of our products. We have entered into supply agreements with numerous third-party suppliers. For example, we have existing supply agreements with contract manufacturing organizations Avid Bioservices, Inc. (Avid) and Catalent Indiana LLC (Catalent) to produce bulk rHuPH20. These manufacturers each produce bulk rHuPH20 under cGMP for use in Hylenex recombinant, and for use in partnered products and product candidates. We rely on their ability to successfully manufacture bulk rHuPH20 according to product specifications. In addition to supply obligations, our contract manufacturers will also provide support for the chemistry, manufacturing and controls sections for FDA and other regulatory filings. We also rely on vendors to supply us with raw materials to produce reagents and other materials for bioanalytical assays used to support our partners’ clinical trials. If any of our contract manufacturers or vendors: (i) is unable to retain its status as an FDA approved manufacturing facility; (ii) is unable to otherwise successfully scale up production to meet corporate or regulatory authority quality standards; (iii) is unable to procure the labor, raw materials, reagents or components necessary to produce our proprietary products, including bulk rHuPH20 and Hylenex recombinant, our bioanalytical assays or our partnered products or (iv) fails to manufacture and supply our partnered and proprietary products, including bulk rHuPH20 in the quantity and quality required by us or our partners for use in Hylenex and partnered products and product candidates for any other reason, our business will be adversely affected. In addition, a significant change in such parties’ or other third-party manufacturers’ business or financial condition could adversely affect their abilities or willingness to fulfill their contractual obligations to us. We have not established, and may not be able to establish, favorable arrangements with additional bulk rHuPH20 manufacturers and suppliers of the ingredients necessary to manufacture bulk rHuPH20 should the existing manufacturers and suppliers become unavailable or in the event that our existing manufacturers and suppliers are unable or unwilling to adequately perform their responsibilities. We have attempted to mitigate the impact of a potential supply interruption through the establishment of excess bulk rHuPH20 inventory where possible, but there can be no assurances that this safety stock will be maintained or that it will be sufficient to address any delays, interruptions or other problems experienced by any of our contract manufacturers. Any delays, interruptions or other problems regarding the ability or willingness of our contract manufacturers to supply bulk rHuPH20 or the ability or willingness of other third-party manufacturers, to supply other raw materials or ingredients necessary to produce our other proprietary or partnered products on a timely basis could: (i) cause the delay of our partners’ clinical trials or otherwise delay or prevent the regulatory approval of our partners’ product candidates; (ii) delay or prevent the effective commercialization of proprietary or partnered products and product candidates; and/or (iii) cause us to breach contractual obligations to deliver bulk rHuPH20 to our partners. Such delays could damage our relationship with our partners, and they could have a material adverse effect on royalties and thus our business and financial condition. Additionally, we rely on third parties to manufacture, prepare, fill, finish, package, store and ship our proprietary and partnered products and product candidates on our behalf. If the third parties we identify fail to perform their obligations, the progress of partners’ clinical trials could be delayed or even suspended and the commercialization of our partnered or proprietary products could be delayed or prevented.

In addition, our Minnetonka, Minnesota facility supports our administrative functions, product development and quality operations and provides additional assembly and warehousing capabilities, and therefore is subject to relevant risks comparable to those of our third-party manufacturers. For example, we may not be able to begin product manufacturing and production due to a number of different reasons including, but not limited to, an ability to obtain necessary supplies and materials, labor and expertise. To the extent we rely on our ability to manufacture and ship any of our proprietary and partnered products, our inability to do so could have a material adverse impact on our business, financial condition and results of operations.

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We rely on third parties to perform necessary services for our products including services related to the distribution, invoicing, rebates and contract administration, co-pay program administration, sample distribution and administration, storage and transportation of our products. If anything should impede their ability to meet their commitments this could impact our business performance.

Depending on the product, we have retained third-party service providers to perform a variety of functions related to the distribution, invoicing, rebates and contract administration, co-pay program administration, sample distribution and administration, storage and transportation of our products, key aspects of which are out of our direct control. We place substantial reliance on these providers as well as other third-party providers that perform services for us, including, depending on the product, entrusting our inventories of products to their care and handling. We also may rely on third parties to administer our drug price reporting and rebate payments and contracting obligations under federal programs. Despite our reliance on third parties, we have responsibilities for compliance with the applicable legal and program requirements. By example, in certain states, we are required to hold licenses to distribute our products in these states and must comply with the associated state laws. Moreover, if these third-party service providers fail to meet expected deadlines, or otherwise do not carry out their contractual duties to us or encounter physical damage or a natural disaster at their facilities, our ability to deliver products to meet commercial demand would be significantly impaired. In addition, we may use third parties to perform various other services for us relating to regulatory monitoring, including adverse event reporting, safety database management and other product maintenance services. If our employees or any third-party service providers fail to comply with applicable laws and regulations, we and/or they may face regulatory or False Claims Act enforcement actions. Moreover, if the quality or accuracy of the data maintained by these service providers is insufficient, our ability to continue to market our products could be jeopardized or we and/or they could be subject to regulatory sanctions. We do not currently have the internal capacity to perform all of these important commercial functions, and we may not be able to maintain commercial arrangements for these services on reasonable terms.

If we or any party to a key collaboration agreement fail to perform material obligations under such agreement, or if a key collaboration agreement is terminated for any reason, our business could suffer.

We have entered into multiple collaboration agreements under which we may receive significant future payments in the form of milestone payments, target designation fees, maintenance fees and royalties. We are heavily dependent on our partners to develop and commercialize product candidates subject to our collaborations in order for us to realize any financial benefits, including revenues from milestones, royalties and product sales from these collaborations. Our partners may not devote the attention and resources to such efforts that we would ourselves, change their clinical development plans, promotional efforts or simultaneously develop and commercialize products in competition to those products we have licensed to them. Any of these actions may not be visible to us immediately and could negatively impact our ability to forecast and our ability to achieve the benefits and revenue we receive from such collaboration. In addition, in the event that a party fails to perform under a key collaboration agreement, or if a key collaboration agreement is terminated, the reduction in anticipated revenues could negatively impact our operations. In addition, the termination of a key collaboration agreement by one or more of our partners could have a material adverse impact on our ability to enter into additional collaboration agreements with new partners on favorable terms, if at all. In certain circumstances, the termination of a key collaboration agreement would require us to revise our corporate strategy going forward and may lead us to reevaluate the applications and value of our technology.

Hylenex and our partners’ ENHANZE products and product candidates rely on the rHuPH20 enzyme, and any adverse development regarding rHuPH20 could substantially impact multiple areas of our business, including current and potential ENHANZE collaborations, as well as any proprietary programs.

rHuPH20 is a key technological component of Hylenex and our ENHANZE technology and most of our ENHANZE partnered products and product candidates, including the current and future products and product candidates under our ENHANZE collaborations. We derive a substantial portion of our revenues from our ENHANZE collaborations. Therefore, if there is an adverse development for rHuPH20 (e.g., an adverse regulatory determination relating to rHuPH20, if we are unable to obtain sufficient quantities of rHuPH20, if we are unable to obtain or maintain material proprietary rights to rHuPH20 or if we discover negative characteristics of rHuPH20), multiple areas of our business, including current and potential collaborations, as well as proprietary programs would be substantially impacted. For example, elevated anti-rHuPH20 antibody titers were detected in the registration trial for HYQVIA as well as in a former partner’s product in a Phase 2 clinical trial with rHuPH20, but have not been associated, in either case, with any adverse events. We monitor for antibodies to rHuPH20 in our collaboration and proprietary programs, and although we do not believe at this time that the incidence of non-neutralizing anti-rHuPH20 antibodies in either the HYQVIA program or the former partner’s program will have a significant impact on our proprietary product and our partners’ product and product candidates, there can be no assurance that there will not be other such occurrences in the foregoing programs or that concerns regarding these antibodies will not also be raised by the FDA or other health authorities in the future, which could result in delays or discontinuations of our Hylenex commercialization activities, the development or commercialization activities of our ENHANZE partners, or deter our entry into additional ENHANZE collaborations with third parties.

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Our business strategy is focused on growth of our ENHANZE and auto-injector technologies, our commercial products and potential growth through acquisition. Currently, ENHANZE is the largest revenue driver and as a result there is a risk for potential negative impact from adverse developments. Future expansion of our strategic focus to additional applications of our ENHANZE technology or by acquiring new technologies may require the use of additional resources, result in increased expense and ultimately may not be successful.

We routinely evaluate our business strategy, and may modify this strategy in the future in light of our assessment of unmet medical needs, growth potential, resource requirements, regulatory issues, competition, risks and other factors. As a result of these strategic evaluations, we may focus our resources and efforts on one or a few programs or fields and may suspend or reduce our efforts on other programs and fields. For example, in the fourth quarter of 2019, we decided to focus our resources on our ENHANZE technology and our commercial product, Hylenex. By focusing primarily on these areas, we increase the potential impact on us if one of those partner programs does not successfully complete clinical trials, achieve commercial acceptance or meet expectations regarding sales and revenue. We may also expand our strategic focus by seeking new therapeutics applications of our technology or by acquiring new technologies which may require the use of additional resources, increased expense and would require the attention of senior management. For example, in May 2022, we acquired Antares as a means to diversify the sources of our revenues. There can be no assurance that our investment in Antares or any such future investment of resources in new technologies will ultimately result in additional approved proprietary or partnered products or commercial success of new therapeutic applications of our technology.

Our partnered or proprietary product candidates may not receive regulatory approvals or their development may be delayed for a variety of reasons, including delayed or unsuccessful clinical trials, regulatory requirements or safety concerns. If we or our partners fail to obtain, or have delays in obtaining, regulatory approvals for any product candidates, our business, financial condition and results of operations may be materially adversely affected.

Clinical testing of pharmaceutical products is a long, expensive and uncertain process, and the failure or delay of a clinical trial can occur at any stage, including the patient enrollment stage. Even if initial results of preclinical and nonclinical studies or clinical trial results are promising, our partners may obtain different results in subsequent trials or studies that fail to show the desired levels of dose safety and efficacy, or we or our partners may not obtain applicable regulatory approval for our products for a variety of other reasons. Preclinical, nonclinical, and clinical trials for proprietary or partnered product candidates could be unsuccessful, which would delay or preclude regulatory approval and commercialization of the product candidates. In the U.S. and other jurisdictions, regulatory approval can be delayed, limited or not granted for many reasons, including, among others:

•during the course of clinical studies, the final data from later Phase 3 studies may differ from data observed in early phase clinical trials, and clinical results may not meet prescribed endpoints for the studies or otherwise provide sufficient data to support the efficacy of our partners’ product candidates;

•clinical and nonclinical test results may reveal inferior pharmacokinetics, adverse events or unexpected safety issues associated with the use of our partners’ product candidates;

•regulatory review may not find that the data from preclinical testing and clinical trials justifies approval;

•regulatory authorities may require that we or our partners change our studies or conduct additional studies which may significantly delay or make continued pursuit of approval commercially unattractive;

•a regulatory agency may reject our and our partners’ trial data or disagree with their interpretations of either clinical trial data or applicable regulations;

•a regulatory agency may require additional safety monitoring and reporting through Risk Evaluation and Mitigation Strategies including conditions to assure safe use programs and we or a partner may decide to not pursue regulatory approval for a such a product;

•a regulatory agency may not approve our manufacturing processes or facilities, or the processes or facilities of our partners, our contract manufacturers or our raw material suppliers;

•failure of our or our partners’ contract research organization, or CRO, to properly perform the clinical trial in accordance with the written protocol, our contractual obligations with them or applicable regulatory requirements;

•a regulatory agency may identify problems or other deficiencies in our existing manufacturing processes or facilities, or the existing processes or facilities of our partners, our contract manufacturers or our raw material suppliers;

•a regulatory agency may change its formal or informal approval requirements and policies, act contrary to previous guidance, adopt new regulations or raise new issues or concerns late in the approval process; or

•a proprietary or partnered product candidate may be approved only for indications that are narrow or under conditions that place the product at a competitive disadvantage, which may limit the sales and marketing activities for such product candidate or otherwise adversely impact the commercial potential of a product.

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If a proprietary or partnered product candidate is not approved in a timely fashion or approval is not obtained on commercially viable terms, or if development of any product candidate is terminated due to difficulties or delays encountered in the regulatory approval process, it could have a material adverse impact on our business, financial condition and results of operation and we would become more dependent on the development of other proprietary or partnered product candidates and/or our ability to successfully acquire other technologies. There can be no assurances that any proprietary or partnered product candidate will receive regulatory approval in a timely manner, or at all. There can be no assurance that partners will be able to gain clarity as to the FDA’s requirements or that the requirements may be satisfied in a commercially feasible way, in which case our ability to enter into collaborations with third parties or explore other strategic alternatives to exploit an opportunity will be limited or may not be possible.

We anticipate that certain proprietary or partnered products will be marketed, and perhaps manufactured, in foreign countries. The process of obtaining regulatory approvals in foreign countries is subject to delay and failure for the reasons set forth above, as well as for reasons that vary from jurisdiction to jurisdiction. The approval process varies among countries and jurisdictions and can involve additional testing. The time required to obtain approval in foreign countries may differ from that required to obtain FDA approval. Foreign regulatory agencies may not provide approvals on a timely basis, if at all. Approval by the FDA does not ensure approval by regulatory authorities in other countries or jurisdictions, and approval by one foreign regulatory authority does not ensure approval by regulatory authorities in other foreign countries or jurisdictions or by the FDA.

Our third-party partners are responsible for providing certain proprietary materials that are essential components of our partnered products and product candidates, and any failure to supply these materials could delay the development and commercialization efforts for these partnered products and product candidates and/or harm our collaborations. Our partners are also responsible for distributing and commercializing their products, and any failure to successfully commercialize their products could materially adversely affect our revenues.

Our development and commercialization partners are responsible for providing certain proprietary materials that are essential components of our partnered products and product candidates. For example, Roche is responsible for producing the Herceptin and MabThera required for its subcutaneous products and Takeda is responsible for producing the GAMMAGARD LIQUID for its product HYQVIA. If a partner, or any applicable third party service provider of a partner, encounters difficulties in the manufacture, storage, delivery, fill, finish or packaging of the partnered product or product candidate or component of such product or product candidate, such difficulties could (i) cause the delay of clinical trials or otherwise delay or prevent the regulatory approval of partnered product candidates; and/or (ii) delay or prevent the effective commercialization of partnered products. Such delays could have a material adverse effect on our business and financial condition. We also rely on our partners to commercialize and distribute their products and if they are unsuccessful in commercializing certain products, the resulting royalty revenue we would receive may be lower than expected.

If we or our partners fail to comply with regulatory requirements applicable to promotion, sale and manufacturing of approved products, regulatory agencies may take action against us or them, which could harm our business.

Any approved products, along with the manufacturing processes, post-approval clinical data requirements, labeling, advertising and promotional activities for these products, are subject to continual requirements and review by the FDA, and state and foreign regulatory bodies. Regulatory authorities subject a marketed product, its manufacturer and the manufacturing facilities to continual review and periodic inspections. We, our partners and our respective contractors, suppliers and vendors, will be subject to ongoing regulatory requirements, including complying with regulations and laws regarding advertising, promotion and sales of drug products, required submissions of safety and other post-market information and reports, registration requirements, cGMP regulations (including requirements relating to quality control and quality assurance, as well as the corresponding maintenance of records and documentation), and the requirements regarding the distribution of samples to physicians and recordkeeping requirements. Further, because some of our proprietary and partnered products and product candidates are drug/device combination products, we and our partners will have to comply with extensive regulatory requirements than would otherwise be required for products that are not combination products. Regulatory agencies may change existing requirements or adopt new requirements or policies. We, our partners and our respective contractors, suppliers and vendors, may be slow to adapt or may not be able to adapt to these changes or new requirements.

In particular, regulatory requirements applicable to pharmaceutical products make the substitution of suppliers and manufacturers costly and time consuming. We have minimal internal manufacturing capabilities and are, and expect to be in the future, substantially dependent on contract manufacturers and suppliers for the manufacture of our products and for their active and other ingredients. The disqualification of these manufacturers and suppliers through their failure to comply with regulatory requirements could negatively impact our business because the delays and costs in obtaining and qualifying alternate suppliers (if such alternative suppliers are available, which we cannot assure) could delay our or our partners’ clinical trials or otherwise inhibit our or partners’ ability to bring approved products to market, which would have a material adverse effect on our business and financial condition. Likewise, if we, our partners and our respective contractors, suppliers and vendors involved in sales and promotion of our products do not comply with applicable laws and regulations, for example off-label or false or misleading promotion, this could materially harm our business and financial condition.

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Failure to comply with regulatory requirements may result in adverse regulatory actions including but not limited to, any of the following:

•restrictions on our or our partners’ products or manufacturing processes;

•warning letters;

•withdrawal of our or our partners’ products from the market;

•voluntary or mandatory recall;

•fines;

•suspension or withdrawal of regulatory approvals;

•suspension or termination of any of our partners’ ongoing clinical trials;

•refusal to permit the import or export of our or our partners’ products;

•refusal to approve pending applications or supplements to approved applications that we submit;

•product seizure;

•injunctions; or

•imposition of civil or criminal penalties.

Failure of our auto-injector and specialty products business to perform could adversely impact future business and operations.

We acquired the Antares auto-injector and specialty products business with the expectation that the acquisition will result in various benefits for the combined company, including providing an opportunity for increased revenues through growth of device revenue and commercial products and development of a new high volume auto-injector. Increased competition, unresolvable technical issues and/or deterioration in business conditions may limit our ability to grow this business. As such, we may not be able to realize the benefits anticipated in connection with the acquisition.

Business interruptions resulting from pandemics or similar public health crises could cause a disruption of the development of our and our partnered product candidates and commercialization of our approved and our partnered products, impede our ability to supply bulk rHuPH20 to our ENHANZE partners or procure and sell our proprietary products and otherwise adversely impact our business and results of operations.

Public health crises such as pandemics or similar outbreaks could adversely impact our business and results of operations by, among other things, disrupting the development of our and our partnered product candidates and commercialization of our and our partnered approved products, causing disruptions in the operations of our third-party contract manufacturing organizations upon whom we rely for the production and supply of our proprietary products, including Hylenex and the bulk rHuPH20 we supply to our partners, and causing other disruptions to our operations.

For example, the COVID-19 pandemic led to the implementation of various responses, including government-imposed quarantines, travel restrictions and other public health safety measures. The extent to which future pandemics impact our operations and/or those of our partners will depend on future developments, which are highly uncertain and unpredictable, including the duration or recurrence of outbreaks, potential future government actions, new information that will emerge concerning the severity and impact of that pandemic and the actions to contain the pandemic or address its impact in the short and long term, among others.

The business disruptions associated with a global pandemic could impact the business, product development priorities and operations of our partners, including potential delays in manufacturing their product candidates or approved products. For example, clinical trial conduct may be impacted in geographies affected by a pandemic. The progress or completion of these clinical trials could be adversely impacted by the pandemic. Additionally, interruption or delays in the operations of the FDA, the EMA and other similar foreign regulatory agencies, or changes in regulatory priorities to focus on the pandemic, may affect required regulatory review, inspection, clearance and approval timelines. Disruptions such as these could result in delays in the development programs of our partnered products or impede the commercial efforts for approved products, resulting in potential reductions or delays in our revenues from partner royalty or milestone payments.

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We rely on many third parties to source active pharmaceutical ingredient and drug products, manufacture and assemble our devices, distribute finished products and provide various logistics activities in order to manufacture and sell our partnered and proprietary products. For example, we rely on third-party manufacturers to manufacture the bulk rHuPH20 that we supply to our partners for their commercial products and product candidates, as well as our commercial product Hylenex. If any such third party manufacturer is adversely impacted by a pandemic and related consequences, including staffing shortages, production slowdowns and disruptions in delivery systems, availability of raw materials, reagents or components or if they divert resources or manufacturing capacity to accommodate the development of treatments or vaccines, our supply chain may be disrupted, limiting our ability to sell Hylenex or supply bulk rHuPH20 to our partners. Any such disruptions to the operations of the third parties upon whom we rely to manufacture and sell our partnered and proprietary products could result in reductions or delays in our revenues.

We may need to raise additional capital in the future and there can be no assurance that we will be able to obtain such funds.

We may need to raise additional capital in the future to fund our operations for general corporate purposes if we do not achieve the level of revenues we expected. Our current cash reserves and expected revenues may not be sufficient for us to fund general operations and conduct our business at the level desired. In addition, if we engage in acquisitions of companies, products or technologies in order to execute our business strategy, we may need to raise additional capital. We may raise additional capital in the future through one or more financing vehicles that may be available to us including (i) new collaborative agreements; (ii) expansions or revisions to existing collaborative relationships; (iii) private financings; (iv) other equity or debt financings; (v) monetizing assets; and/or (vi) the public offering of securities.

If we are required to raise additional capital in the future, it may not be available on favorable financing terms within the time required, or at all. If additional capital is not available on favorable terms when needed, we will be required to raise capital on adverse terms or significantly reduce operating expenses through the restructuring of our operations or deferral of strategic business initiatives. If we raise additional capital through a public offering of securities or equity, a substantial number of additional shares of our common stock may be issued, which will dilute the ownership interest of our current investors and may negatively affect our stock price.

We currently have significant debt and may incur additional debt. Failure by us to fulfill our obligations under the applicable debt agreements may cause repayment obligations to accelerate.

The aggregate amount of our consolidated indebtedness, net of debt discount, as of December 31, 2023 was $1,499.2 million, which includes $805.0 million in aggregate principal amount of the 2027 Convertible Notes and $720.0 million in aggregate principal of the 2028 Convertible Notes, net of unamortized debt discount of $11.0 million and $14.8 million for the 2027 Convertible Notes and 2028 Convertible Notes, respectively.

Our indebtedness may:

•make it difficult for us to satisfy our financial obligations, including making scheduled principal and interest payments on our indebtedness;

•limit our ability to borrow additional funds for working capital, capital expenditures, acquisitions or other general corporate purposes;

•limit our ability to use our cash flow or obtain additional financing for future working capital, capital expenditures, acquisitions, share repurchases or other general business purposes;

•require us to use a portion of our cash flow from operations to make debt service payments;

•limit our flexibility to plan for, or react to, changes in our business and industry;

•place us at a competitive disadvantage compared to our less leveraged competitors; and

•increase our vulnerability to the impact of adverse economic and industry conditions.

In addition, our 2022 Credit Agreement includes certain affirmative and negative covenants, that, among other things, may restrict our ability to: create liens on assets; incur additional indebtedness; make investments; make acquisitions and other fundamental changes; and sell and dispose of property or assets. The 2022 Credit Agreement also includes financial covenants requiring us to maintain, measured as of the end of each fiscal quarter, a maximum consolidated net leverage ratio of 4.75 to 1.00 initially, which declines to 4.00 to 1.00 over the term of the loan facility, and a minimum consolidated interest coverage ratio of 3.00 to 1.00. The 2022 Credit Agreement also contains customary representations and warranties and events of default. Complying with the covenants contained in the 2022 Credit Agreement could make it more difficult for us to execute our business strategy. Further, in the event of default by us under the 2022 Credit Agreement, the lenders would be entitled to exercise their remedies thereunder, including the right to accelerate the debt, upon which we may be required to repay all amounts then outstanding under the 2022 Credit Agreement which would harm our financial condition.

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Our ability to make payments on our existing or any future debt will depend on our future operating performance and ability to generate cash and may also depend on our ability to obtain additional debt or equity financing. It will also depend on financial, business or other factors affecting our operations, many of which are beyond our control. We will need to use cash to pay principal and interest on our debt, thereby reducing the funds available to fund operations, strategic initiatives and working capital requirements. If we are unable to generate sufficient cash to service our debt obligations, an event of default may occur under any of our debt instruments which could result in an acceleration of such debt upon which we may be required to repay all the amounts outstanding under some or all of our debt instruments. Such an acceleration of our debt obligations could harm our financial condition. From time to time, we may seek to retire or repurchase our outstanding debt through cash purchases and/or exchanges for equity or debt, in open-market purchases, privately negotiated transactions or otherwise. Any such repurchases or exchanges would be on such terms and at such prices as we determine, and will depend on current market conditions, our liquidity needs, any restrictions in our contracts and other factors. The amounts involved in such transactions could be material.

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 notes at any time during specified periods at their option. If one or more holders elect to convert their notes, we would be required to settle a portion or all of our conversion obligation in cash, which could adversely affect our liquidity. Even if holders of the Convertible Notes do not elect to convert their notes, we are required under applicable accounting rules to reclassify all or a portion of the outstanding principal of the notes as a current rather than long-term liability when the conditional conversion feature is triggered, which results in a material reduction of our net working capital.

Conversion of our Convertible Notes may dilute the ownership interest of existing stockholders or may otherwise depress the price of our common stock.

The conversion of some or all of our Convertible Notes, to the extent we deliver shares upon conversion, will dilute the ownership interests of existing stockholders. Any sales in the public market of the Convertible Notes or our common stock issuable upon conversion of the Convertible Notes could adversely affect prevailing market prices of our common stock. In addition, the existence of the Convertible Notes may encourage short selling by market participants because the conversion of the Convertible Notes could be used to satisfy short positions, or anticipated conversion of the Convertible Notes into shares of our common stock could depress the price of our common stock.

If proprietary or partnered product candidates are approved for commercialization but do not gain market acceptance resulting in commercial performance below that which was expected or projected, our business may suffer.

Assuming that existing or future proprietary or partnered product candidates obtain the necessary regulatory approvals for commercial sale, a number of factors may affect the market acceptance of these newly-approved products, including, among others:

•the degree to which the use of these products is restricted by the approved product label;

•the price of these products relative to other therapies for the same or similar treatments;

•the extent to which reimbursement for these products and related treatments will be available from third-party payers including government insurance programs and private insurers;

•the introduction of generic or biosimilar competitors to these products;

•the perception by patients, physicians and other members of the health care community of the effectiveness and safety of these products for their prescribed treatments relative to other therapies for the same or similar treatments;

•the ability and willingness of our partners to fund sales and marketing efforts; and

•the effectiveness of the sales and marketing efforts of our partners.

If these proprietary or partnered products do not gain or maintain market acceptance or experience reduced sales resulting in commercial performance below that which was expected or projected, the revenues we expect to receive from these products will be diminished which could harm our ability to fund future operations, including conduct acquisitions, execute our planned share repurchases, or affect our ability to use funds for other general corporate purposes and cause our business to suffer.

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In addition, our proprietary or partnered product candidates will be restricted to the labels approved by FDA and applicable regulatory bodies, and these restrictions may limit the marketing and promotion of the ultimate products. If the approved labels are restrictive, the sales and marketing efforts for these products may be negatively affected.

Our ability to license our ENHANZE and device technologies to our partners depends on the validity of our patents and other proprietary rights.

Patents and other proprietary rights are essential to our business. Our success will depend in part on our ability to obtain and maintain patent protection for our inventions, to preserve our trade secrets and to operate without infringing the proprietary rights of third parties. We have multiple patents and patent applications throughout the world pertaining to our recombinant human hyaluronidase and methods of use and manufacture, including an issued U.S. patent which expires in 2027, an issued European patent which expires in 2024 and additional patents that are valid into 2029, which we believe cover the products and product candidates under our existing collaborations, and Hylenex. Although we believe our patent filings represent a barrier to entry for potential competitors looking to utilize these hyaluronidases, upon expiration of our patents other pharmaceutical companies may (if they do not infringe our other patents) seek to compete with us by developing, manufacturing and selling biosimilars to the active drug ingredient in our ENHANZE technology used by our partners in combination with their products. Any such loss of patent protection or proprietary rights could lead to a reduction or loss of revenues, incentivize one or more of our key ENHANZE partners to terminate their relationship with us and impact our ability to enter into new collaboration and license agreements.

Developing, manufacturing and marketing pharmaceutical products for human use involves significant product liability risks for which we may have insufficient insurance coverage.

The development, manufacture, testing, marketing and sale of pharmaceutical products and medical devices involves the risk of product liability claims by consumers and other third parties. Product liability claims may be brought by individuals seeking relief for themselves, or by groups seeking to represent a class of injured patients. Further, third-party payers, either individually or as a putative class, may bring actions seeking to recover monies spent on one of our products. Although we maintain product liability insurance coverage, product liability claims can be high in the pharmaceutical industry, and our insurance may not sufficiently cover our actual liabilities. If product liability claims were to be made against us, it is possible that the liabilities may exceed the limits of our insurance policy, or our insurance carriers may deny, or attempt to deny, coverage in certain instances. If a lawsuit against us is successful, then the insurance coverage may not be sufficient and could materially and adversely affect our business and financial condition. Furthermore, various distributors of pharmaceutical products require minimum product liability insurance coverage before purchase or acceptance of products for distribution. Failure to satisfy these insurance requirements could impede our ability to achieve broad distribution of our proposed products, and higher insurance requirements could impose additional costs on us. In addition, since many of our partnered product candidates include the pharmaceutical products of a third-party, we run the risk that problems with the third-party pharmaceutical product will give rise to liability claims against us. Product liability claims can also result in additional regulatory consequences including, but not limited to, investigations and regulatory enforcement actions, as well as recalls, revocation of approvals, or labeling, marketing or promotional restrictions or changes. Product liability claims could also harm our reputation and the reputation of our products, adversely affecting our ability to market our products successfully. In addition, defending a product liability lawsuit is expensive and can divert the attention of our key employees from operating our business. Such claims can also impact our ability to initiate or complete clinical trials.

If our partners do not achieve projected development, clinical, or regulatory goals in the timeframes publicly announced or otherwise expected, the commercialization of our partners products may be delayed and, as a result, our business, financial condition, and results of operations may be adversely affected.

From time to time, our partners may publicly articulate the estimated timing for the accomplishment of certain scientific, clinical, regulatory and other product development goals. The accomplishment of any goal is typically based on numerous assumptions, and the achievement of a particular goal may be delayed for any number of reasons both within and outside of our and our partners’ control. If scientific, regulatory, strategic or other factors cause a collaboration partner to not meet a goal, regardless of whether that goal has been publicly articulated or not, our stock price may decline rapidly. Stock price declines may also trigger direct or derivative shareholder lawsuits. As with any litigation proceeding, the eventual outcome of any legal action is difficult to predict. If any such lawsuits occur, we will incur expenses in connection with the defense of these lawsuits, and we may have to pay substantial damages or settlement costs in connection with any resolution thereof. Although we have insurance coverage against which we may claim recovery against some of these expenses and costs, the amount of coverage may not be adequate to cover the full amount or certain expenses and costs may be outside the scope of the policies we maintain. In the event of an adverse outcome or outcomes, our business could be materially harmed from depletion of cash resources, negative impact on our reputation, or restrictions or changes to our governance or other processes that may result from any final disposition of the lawsuit. Moreover, responding to and defending pending litigation significantly diverts management’s attention from our operations.

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In addition, the consistent failure to meet publicly announced milestones may erode the credibility of our management team with respect to future milestone estimates.

Future acquisitions could disrupt our business and impact our financial condition.

In order to augment and extend our revenue, we acquired Antares in May 2022 and we may decide to acquire additional businesses, products and technologies. As we have limited experience in evaluating and completing acquisitions, our ability as an organization to make such acquisitions is unproven. Acquisitions could require significant capital infusions and could involve many risks, including, but not limited to, the following:

•we may have to issue additional convertible debt or equity securities to complete an acquisition, which would dilute our stockholders and could adversely affect the market price of our common stock;

•an acquisition may negatively impact our results of operations because it may require us to amortize or write down amounts related to goodwill and other intangible assets, or incur or assume substantial debt or liabilities, or it may cause adverse tax consequences, substantial depreciation or deferred compensation charges;

•we may encounter difficulties in assimilating and integrating the business, products, technologies, personnel or operations of companies that we acquire;

•certain acquisitions may impact our relationship with existing or potential partners who are competitive with the acquired business, products or technologies;

•acquisitions may require significant capital infusions and the acquired businesses, products or technologies may not generate sufficient value to justify acquisition costs;

•we may take on liabilities from the acquired company such as debt, legal liabilities or business risk which could be significant;

•an acquisition may disrupt our ongoing business, divert resources, increase our expenses and distract our management;

•acquisitions may involve the entry into a geographic or business market in which we have little or no prior experience; and

•key personnel of an acquired company may decide not to work for us.

If any of these risks occurred, it could adversely affect our business, financial condition and operating results. There is no assurance that we will be able to identify or consummate any future acquisitions on acceptable terms, or at all. If we do pursue any future acquisitions, it is possible that we may not realize the anticipated benefits from such acquisitions or that the market will not view such acquisitions positively.

Our effective tax rate may fluctuate, and we may incur obligations in tax jurisdictions in excess of accrued amounts.

Our effective tax rate is derived from a combination of applicable tax rates in the various places that we operate. In preparing our financial statements, we estimate the amount of tax that will become payable in each of such places. Nevertheless, our effective tax rate may be different than experienced in the past due to numerous factors, including changes in the mix of our profitability between different tax jurisdictions, the results of examinations and audits of our tax filings, our inability to secure or sustain acceptable agreements with tax authorities, changes in accounting for income taxes and changes in tax laws. Any of these factors could cause us to experience an effective tax rate significantly different from previous periods or our current expectations and may result in tax obligations in excess of amounts accrued in our financial statements.

In addition, on September 30, 2021, we determined, based on our facts and circumstances, that it was more likely than not that a substantial portion of our deferred tax assets would be realized and, as a result, substantially all of our valuation allowance against our deferred tax assets was released. This resulted in substantially and disproportionately increasing our reported net income and our earnings per share compared to our operating results for 2021. Historical and future comparisons to these amounts are not, and will not be, indicative of actual profitability trends for our business. Starting in 2022, we recorded income tax expense at an estimated tax rate that approximate statutory tax rates, resulting a reduction in our net income and net income per share.

Risks Related To Ownership of Our Common Stock

Our stock price is subject to significant volatility.

We participate in a highly dynamic industry which often results in significant volatility in the market price of common stock irrespective of company performance. The high and low sales prices of our common stock during the twelve months ended December 31, 2023 were $57.00 and $29.85, respectively. In addition to the other risks and uncertainties described elsewhere in this Annual Report on Form 10-K and all other risks and uncertainties that are either not known to us at this time or which we deem to be immaterial, any of the following factors may lead to a significant drop in our stock price:

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•the presence of competitive products to those being developed by our partners;

•failure (actual or perceived) of our partners to devote attention or resources to the development or commercialization of partnered products or product candidates licensed to such partner;

•a dispute regarding our failure, or the failure of one of our partners, to comply with the terms of a collaboration agreement;

•the termination, for any reason, of any of our collaboration agreements;

•the sale of common stock by any significant stockholder, including, but not limited to, direct or indirect sales by members of management or our Board of Directors;

•the resignation, or other departure, of members of management or our Board of Directors;

•general negative conditions in the healthcare industry;

•pandemics or other global crises;

•general negative conditions in the financial markets;

•the cost associated with obtaining regulatory approval for any of our proprietary or partnered product candidates;

•the failure, for any reason, to secure or defend our intellectual property position;

•the failure or delay of applicable regulatory bodies to approve our proprietary or partnered product candidates;

•identification of safety or tolerability issues associated with our proprietary or partnered products or product candidates;

•failure of our or our partners’ clinical trials to meet efficacy endpoints;

•suspensions or delays in the conduct of our or our partners’ clinical trials or securing of regulatory approvals;

•adverse regulatory action with respect to our proprietary or partnered products and product candidates such as loss of regulatory approval to commercialize such products, clinical holds, imposition of onerous requirements for approval or product recalls;

•our failure, or the failure of our partners, to successfully commercialize products approved by applicable regulatory bodies such as the FDA;

•our failure, or the failure of our partners, to generate product revenues anticipated by investors;

•disruptions in our clinical or commercial supply chains, including disruptions caused by problems with a bulk rHuPH20 contract manufacturer or a fill and finish manufacturer for any product or product collaboration candidate;

•the sale of additional debt and/or equity securities by us;

•our failure to obtain financing on acceptable terms or at all;

•a restructuring of our operations;

•an inability to execute our share repurchase program in the time and manner we expect due to market, business, legal or other considerations; or

•a conversion of the Convertible Notes into shares of our common stock.

Future transactions where we raise capital may negatively affect our stock price.

We are currently a “Well-Known Seasoned Issuer” and may file automatic shelf registration statements at any time with the SEC. Sales of substantial amounts of shares of our common stock or other securities under any future shelf registration statements could lower the market price of our common stock and impair our ability to raise capital through the sale of equity securities.

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Anti-takeover provisions in our charter documents, the Indentures and Delaware law may make an acquisition of us more difficult.

Anti-takeover provisions in our charter documents, the Indentures and Delaware law may make an acquisition of us more difficult. First, our Board of Directors is classified into three classes of directors. Under Delaware law, directors of a corporation with a classified board may be removed only for cause unless the corporation’s certificate of incorporation provides otherwise. Our amended and restated certificate of incorporation does not provide otherwise. In addition, our bylaws limit who may call special meetings of stockholders, permitting only stockholders holding at least 50% of our outstanding shares to call a special meeting of stockholders. Our amended and restated certificate of incorporation does not include a provision for cumulative voting for directors. Under cumulative voting, a minority stockholder holding a sufficient percentage of a class of shares may be able to ensure the election of one or more directors. Finally, our bylaws establish procedures, including advance notice procedures, with regard to the nomination of candidates for election as directors and stockholder proposals.

These provisions in our charter documents may discourage potential takeover attempts, discourage bids for our common stock at a premium over market price or adversely affect the market price of, and the voting and other rights of the holders of, our common stock. These provisions could also discourage proxy contests and make it more difficult for stockholders to elect directors other than the candidates nominated by our Board of Directors.

Further, in connection with our Convertible Notes issuances, we have entered into indentures, dated as of March 1, 2021 and August 18, 2022 (the “Indentures”), with The Bank of New York Mellon Trust Company, N.A., as trustee. Certain provisions in the Indentures could make it more difficult or more expensive for a third party to acquire us. For example, if a takeover would constitute a fundamental change, holders of the Convertible Notes will have the right to require us to repurchase their Convertible Notes in cash. In addition, if a takeover constitutes a make-whole fundamental change, we may be required to increase the conversion rate for holders who convert their Convertible Notes in connection with such takeover. In addition, a change of control constitutes an event of default under our 2022 Credit Agreement. Such event of default could result in the administrative agent or the lender parties thereto declaring the unpaid principal, all accrued and unpaid interest, and all other amounts owing or payable under the 2022 Credit Agreement to be immediately due and payable. In either case, and in other cases, our obligations under the Convertible Notes and the Indentures could increase the cost of acquiring us or otherwise discourage a third-party from acquiring us or removing incumbent 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 may prohibit large stockholders from consummating a merger with, or acquisition of, us.

These provisions may deter an acquisition of us that might otherwise be attractive to stockholders.

Risks Related to Our Industry

Our and our partnered products must receive regulatory approval before they can be sold, and compliance with the extensive government regulations is expensive and time consuming and may result in the delay or cancellation of our or our partnered product sales, introductions or modifications.

Extensive industry regulation has had, and will continue to have, a significant impact on our business. All pharmaceutical and medical device companies, including ours, are subject to extensive, complex, costly and evolving regulation by the health regulatory agencies including the FDA (and with respect to controlled drug substances, the U.S. Drug Enforcement Administration (DEA)) and equivalent foreign regulatory agencies and state and local/regional government agencies. The Federal Food, Drug and Cosmetic Act, the Controlled Substances Act and other domestic and foreign statutes and regulations govern or influence the testing, manufacturing, packaging, labeling, storing, recordkeeping, safety, approval, advertising, promotion, sale and distribution of our products and our partners’ products and product candidates. We are dependent on receiving FDA and other governmental approvals, including regulatory approvals in jurisdictions outside the United States, prior to manufacturing, marketing and shipping our products. Consequently, there is always a risk that the FDA or other applicable governmental authorities, including those outside the United States, will not approve our or our partners’ products or may impose onerous, costly and time-consuming requirements such as additional clinical or animal testing. Regulatory authorities may require that our partners change our studies or conduct additional studies, which may significantly delay or make continued pursuit of approval commercially unattractive to our partners. For example, the approval of the HYQVIA BLA was delayed by the FDA until we and our partner provided additional preclinical data sufficient to address concerns regarding non-neutralizing antibodies to rHuPH20 that were detected in the registration trial. Although these antibodies have not been associated with any known adverse clinical effects, and the HYQVIA BLA was ultimately approved by the FDA, the FDA or other foreign regulatory agency may, at any time, halt our and our partners’ development and commercialization activities due to safety concerns. In addition, even if our proprietary or partnered products are approved, regulatory agencies may also take post-approval action limiting or revoking our or our partners’ ability to sell these products. Any of these regulatory actions may adversely affect the economic benefit we may derive from our proprietary or our partnered products and therefore harm our financial condition.

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Under certain of these regulations, in addition to our partners, we and our contract suppliers and manufacturers are subject to periodic inspection of our or their respective facilities, procedures and operations and/or the testing of products by the FDA, the DEA and other authorities, which conduct periodic inspections to confirm that we and our contract suppliers and manufacturers are in compliance with all applicable regulations. The FDA also conducts pre-approval and post-approval reviews and plant inspections to determine whether our systems, or our contract suppliers’ and manufacturers’ processes, are in compliance with cGMP and other FDA regulations. If our partners, we, or our contract suppliers and manufacturers, fail these inspections, our partners may not be able to commercialize their products in a timely manner without incurring significant additional costs, or at all.

In addition, the FDA imposes a number of complex regulatory requirements on entities that advertise and promote pharmaceuticals including, but not limited to, standards and regulations for direct-to-consumer advertising, off-label promotion, industry-sponsored scientific and educational activities, and promotional activities involving the Internet.

Because some of our and our partners’ products and product candidates are considered to be drug/device combination products, the approval and post-approval requirements that we and they are required to comply with can be more complex.

Many of our and our partners’ products and product candidates are considered to be drug/device combination products by the FDA, consisting of a drug product and a drug delivery device. If marketed individually, each component would be subject to different regulatory pathways and reviewed by different centers within the FDA. A combination product, however, is assigned to a center that will have primary jurisdiction over its pre-market review and regulation based on a determination of the product’s primary mode of action, which is the single mode of action that provides the most important therapeutic action. In the case of our and our partners’ products and product candidates, the primary mode of action is typically attributable to the drug component of the products, which means that the Center of Drug Evaluation and Research has primary jurisdiction over the products’ premarket development and review. These products and product candidates will be and have been subject to the FDA drug approval process and will not require a separate FDA clearance or approval for the device component. Even though these products and product candidates will not require a separate FDA clearance or approval, both the drug and device centers within the FDA will review the marketing application for safety, the efficacy of both the drug and device component, including the design and reliability of the injector, and a number of other different areas, such as to ensure that the drug labeling adequately discloses all relevant information and risks, and to confirm that the instructions for use are accurate and easy to use. These reviews could increase the time needed for review completion of a successful application and may require additional studies, such as usage studies, to establish the validity of the instructions for use. Such reviews and requirements may extend the time necessary for the approval of drug-device combinations. In the case of combination product candidates for which we or our partners are seeking approval via the ANDA pathway, it is also possible that the agency may decide that the unique nature of combination products leads it to question the claims of bioequivalence and/or same labeling, resulting in the need to refile the application under Section 505(b)(2) of the Federal Food, Drug and Cosmetic Act. This may result in delays in product approval and may cause us or our partners to incur additional costs associated with testing, including clinical trials. Approval via the 505(b)(2) pathway may also result in additional selling expenses and a decrease in market acceptance due to the lack of substitutability by pharmacies or formularies. In addition, approval under the 505(b)(2) or ANDA regulatory pathway is not a guarantee of an exclusive position for the approved product in the marketplace.

Further, although precedent and guidance exist for the approval of such combination products, the FDA could change what it requires or how it reviews submissions. Changes in review processes or the requirement for the study of combination products could delay anticipated launch dates or be cost prohibitive. Such delay or failure to launch these products or devices could adversely affect our revenues and future profitability. If our or our partners’ combination product candidates are approved, we, our partners, and any of our respective contractors will be required to comply with FDA regulatory requirements related to both drugs and devices. For instance, drug/device combination products must comply with both the drug cGMPs and device QSRs. Depending on whether the drug and device components are at the same facility, however, the FDA regulations provide a streamlined method to comply with both sets of requirements. The FDA has specifically promulgated guidance on injectors, which discuss the FDA’s requirements with respect to marketing application and post-market injector design controls and reliability analyses. Additionally, drug/device combination products will be subject to additional FDA and constituent part reporting requirements. Compliance with these requirements will require additional effort and monetary expenditure.

We may be subject, directly or indirectly, to various broad federal and state healthcare laws. If we are unable to comply, or have not fully complied, with such laws, we could face civil, criminal and administrative penalties, damages, monetary fines, disgorgement, possible exclusion from participation in Medicare, Medicaid and other federal healthcare programs, contractual damages, reputational harm, diminished profits and future earnings and curtailment or restructuring of our operations, any of which could adversely affect our ability to operate.

Our business operations and activities may be directly, or indirectly, subject to various broad federal and state healthcare laws, including without limitation, anti-kickback laws, the Foreign Corrupt Practices Act (FCPA), false claims laws, civil monetary penalty laws, data privacy and security laws, tracing and tracking laws, as well as transparency (or “sunshine”) laws regarding payments or other items of value provided to healthcare providers. These laws may restrict or prohibit a wide range

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of business activities, including, but not limited to, research, manufacturing, distribution, pricing, discounting, marketing and promotion and other business arrangements. These laws may impact, among other things, our current activities with principal investigators and research subjects, as well as sales, marketing and education programs. Many states have similar healthcare fraud and abuse laws, some of which may be broader in scope and may not be limited to items or services for which payment is made by a government health care program.

Efforts to ensure that our business arrangements will comply with applicable healthcare laws may involve substantial costs. While we have adopted a healthcare corporate compliance program, it is possible that governmental and enforcement authorities will conclude that our business practices may not comply with current or future statutes, regulations or case law interpreting applicable fraud and abuse or other healthcare laws. If our operations or activities are found to be in violation of any of the laws described above or any other governmental regulations that apply to us, we may be subject to, without limitation, civil, criminal and administrative penalties, damages, monetary fines, disgorgement, possible exclusion from participation in Medicare, Medicaid and other federal healthcare programs, contractual damages, reputational harm, diminished profits and future earnings and curtailment or restructuring of our operations, any of which could adversely affect our ability to operate.

In addition, any sales of products outside the U.S. will also likely subject us to the FCPA and foreign equivalents of the healthcare laws mentioned above, among other foreign laws.

We may be required to initiate or defend against legal proceedings related to intellectual property rights, which may result in substantial expense, delay and/or cessation of certain development and commercialization of our products.

We primarily rely on patents to protect our intellectual property rights. The strength of this protection, however, is uncertain. For example, it is not certain that:

•we will be able to obtain patent protection for our products and technologies;

•the scope of any of our issued patents will be sufficient to provide commercially significant exclusivity for our products and technologies;

•others will not independently develop similar or alternative technologies or duplicate our technologies and obtain patent protection before we do; and

•any of our issued patents, or patent pending applications that result in issued patents, will be held valid, enforceable and infringed in the event the patents are asserted against others.

We currently own or license patents in a portfolio and also have pending patent applications applicable to rHuPH20 and other proprietary materials. There can be no assurance that our existing patents, or any patents issued to us as a result of our pending patent applications, will provide a basis for commercially viable products, will provide us with any competitive advantages, or will not face third-party challenges or be the subject of further proceedings limiting their scope or enforceability. Any weaknesses or limitations in our patent portfolio could have a material adverse effect on our business and financial condition. In addition, if our pending patent applications do not result in issued patents, or result in issued patents with narrow or limited claims, this could result in us having no or limited protection against generic or biosimilar competition against our product candidates which would have a material adverse effect on our business and financial condition.

We or our partners may become involved in interference proceedings in the U.S. Patent and Trademark Office, or other proceedings in other jurisdictions, to determine the priority, validity or enforceability of our patents or our partners’ patents related to our collaborations. For example, as a result of one such proceeding, in March 2023 the Opposition Division of the European Patent Office revoked one of Janssen’s co-formulation patents for DARZALEX® (daratumumab) SC. In addition, costly litigation could be necessary to protect our patent position. Successful challenges to the priority, validity or enforceability of our or our partners’ patents could have a material adverse effect on our business and financial condition.

We also rely on trade secrets, unpatented proprietary know-how and continuing technological innovation that we seek to protect with confidentiality agreements with employees, consultants and others with whom we discuss our business. Disputes may arise concerning the ownership of intellectual property or the applicability or enforceability of agreements covering these rights, and we might not be able to resolve these disputes in our favor.

We also rely on trademarks to protect the names of our products (e.g. Hylenex recombinant). We may not be able to obtain trademark protection for any proposed product names we select. In addition, product names for pharmaceutical products must be approved by health regulatory authorities such as the FDA in addition to meeting the legal standards required for trademark protection and product names we propose may not be timely approved by regulatory agencies which may delay product launch. In addition, our trademarks may be challenged by others. If we enforce our trademarks against third parties, such enforcement proceedings may be expensive.

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In addition to protecting our own intellectual property rights, third parties may assert patent, trademark or copyright infringement or other intellectual property claims against us. If we become involved in any intellectual property litigation, we may be required to pay substantial damages, including but not limited to treble damages, attorneys’ fees and costs, for past infringement if it is ultimately determined that our products infringe a third-party’s intellectual property rights. Even if infringement claims against us are without merit, defending a lawsuit takes significant time, may be expensive and may divert management’s attention from other business concerns. Further, in the case of an injunction, we could be stopped from developing, manufacturing or selling our products until we obtain a license from the owner of the relevant technology or other intellectual property rights. If such a license is available at all, it may require us to pay royalties or other fees.

We may incur significant liability if it is determined that we are promoting or have in the past promoted the “off-label” use of drugs or medical devices, or otherwise promoted or marketed approved products in a manner inconsistent with the FDA’s requirements.

In the U.S. and certain other jurisdictions, companies may not promote drugs or medical devices for “off-label” uses, that is, uses that are not described in the product’s labeling and that differ from those that were approved or cleared by the FDA or other foreign regulatory agencies. However, physicians and other healthcare practitioners may prescribe drug products and use medical devices for off-label or unapproved uses, and such uses are common across some medical specialties. Although the FDA does not regulate a physician’s choice of medications, treatments or product uses, the Federal Food, Drug and Cosmetic Act and FDA regulations significantly restrict permissible communications on the subject of off-label uses of drug products and medical devices by pharmaceutical and medical device companies. As the sponsors of FDA approved products, we and our partners will not only be responsible for the actions of the companies but also can be held liable for the actions of employees and contractors, requiring that all employees and contractors engaging in regulated functions, such as product promotion, be adequately trained and monitored, which requires time and monetary expenditures.

If the FDA determines that a company has improperly promoted a product “off label” or otherwise not in accordance with the agency’s promotional requirements, the FDA may issue a warning letter or seek other enforcement action to limit or restrict certain promotional activities or materials or seek to have product withdrawn from the market or seize product, among other enforcement requirements. In addition, a company that is found to have improperly promoted off-label uses may be subject to significant liability, including civil fines, criminal fines and penalties, civil damages and exclusion from federal funded healthcare programs such as Medicare and Medicaid and/or government contracting, consent decrees and corporate integrity agreements, as well as potential liability under the federal FCA and applicable state false claims acts. Conduct giving rise to such liability could also form the basis for private civil litigation by third-party payers or other persons allegedly harmed by such conduct.

Moreover, in addition to the regulatory restrictions on off-label promotion, there are other FDA restrictions on and requirements concerning product promotion and advertising, such as requirements that such communications be truthful and non-misleading and adequately supported. The FDA also has requirements concerning the distribution of drug samples. The FDA and other authorities may take the position that we are not in compliance with promotional, advertising, and marketing requirements, and, if such non-compliance is proven, we may be subject to significant liability, including but not limited to administrative, civil and criminal penalties and fines, in addition to regulatory enforcement actions.

For certain of our products, we and our independent contractors, distributors, prescribers, and dispensers are required to comply with regulatory requirements related to controlled substances, which will require the expenditure of additional time and will incur additional expenses to maintain compliance and may subject us to additional penalties for noncompliance, which could inhibit successful commercialization.

Certain of our products are controlled substances and accordingly, we, and our contractors, distributors, prescribers, and dispensers must comply with Federal controlled substances laws and regulations, enforced by the U.S. Drug Enforcement Administration (“DEA”), as well as state-controlled substances laws and regulations enforced by state authorities. These requirements include, but are not limited to, registration, security, recordkeeping, reporting, storage, distribution, importation, exportation, inventory, and other requirements. These requirements are enforced by the DEA through periodic inspections. Not only must continuous controlled substance registration be maintained, but compliance with the applicable controlled substance requirements will require significant efforts and expenditures, which could also inhibit successful commercialization. These compliance requirements also add complexity to the distribution, prescribing and dispensing of certain of our products that may also impact commercialization, including the establishment of anti-diversion procedures. If we and our contractors, distributors, prescribers, and dispensers do not comply with the applicable controlled substance requirements, we or they may be subject to administrative, civil or criminal enforcement, including civil penalties, refusals to renew necessary registrations, revocation of registrations, criminal proceedings, or consent decrees.

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Patent protection for biotechnology inventions and for inventions generally is subject to significant scrutiny; if patent laws or the interpretation of patent laws change, our business may be adversely impacted because we may lose the ability to obtain patent protection or enforce our intellectual property rights against competitors who develop and commercialize products based on our discoveries.

Patent protection in general, including for protein-based products is based on evolving complex legal principles and factual questions, which introduce uncertainties as to patentability, patent scope, validity and enforcement. In recent years, there have been significant changes in patent law, including the legal standards that govern the patentability and scope of biotechnology patents. Recent court decisions have made it more difficult to obtain patents, by making it more difficult to satisfy the patentable subject matter requirements, disclosure and enablement requirements, and the non-obviousness requirement; decreasing the availability of injunctions against infringers; and increasing the likelihood of challenging the validity of a patent through a declaratory judgment action. Taken together, these decisions could make it more difficult and costly for us to obtain, license and enforce our patents. In addition, patents may be challenged through post-grant opposition proceedings and be subject to a prior user defense to infringement. There also have been, and continue to be, policy discussions concerning the scope of patent protection, including for biotechnology inventions. Social and political opposition to biotechnology patents may lead to narrower patent protection within the biotechnology industry. Judicial and legislative changes introduce significant uncertainty in the patent law landscape and may potentially negatively impact our ability to procure, maintain and enforce patents to provide exclusivity for our products and may allow others to use our discoveries to develop and commercialize competitive products, which could impair our business.

If third-party reimbursement and customer contracts are not available, our proprietary and partnered products may not be accepted in the market resulting in commercial performance below that which was expected or projected.

Our and our partners’ ability to earn sufficient returns on proprietary and partnered products will depend in part on the extent to which reimbursement for these products and related treatments will be available from government health administration authorities, private health insurers, managed care organizations and other healthcare providers.

Third-party payers are increasingly attempting to limit both the coverage and the level of reimbursement of new drug products to contain costs. Consequently, significant uncertainty exists as to the reimbursement status of newly approved healthcare products. Third-party payers may not establish adequate levels of reimbursement for the products that we and our partners commercialize, which could limit their market acceptance and result in a material adverse effect on our revenues and financial condition.

Customer contracts, such as with group purchasing organizations and hospital formularies, will often not offer contract or formulary status without either the lowest price or substantial proven clinical differentiation. If, for example, Hylenex is compared to animal-derived hyaluronidases by these entities, it is possible that neither of these conditions will be met, which could limit market acceptance and result in a material adverse effect on our revenues and financial condition.

The rising cost of healthcare and related pharmaceutical product pricing has led to cost containment pressures from third-party payers as well as changes in federal coverage and reimbursement policies and practices that could cause us and our partners to sell our products at lower prices, and impact access to our and our partners’ products, resulting in less revenue to us.

Any of our proprietary or partnered products that have been, or in the future are, approved by the FDA may be purchased or reimbursed by state and federal government authorities, private health insurers and other organizations, such as health maintenance organizations and managed care organizations. Such third-party payers increasingly challenge pharmaceutical product pricing. The trend toward managed healthcare in the U.S., the growth of such organizations, and various legislative proposals and enactments to reform healthcare and government insurance programs, including the Medicare Prescription Drug Modernization Act of 2003 and the Affordable Care Act of 2010 (ACA), could significantly influence the manner in which pharmaceutical products are prescribed and purchased, resulting in lower prices and/or a reduction in demand. Such cost containment measures and healthcare reforms could adversely affect our ability to sell our product and our partners’ ability to sell their products.

In the U.S., our business may be impacted by changes in federal reimbursement policy resulting from executive actions, federal regulations, or federal demonstration projects.

The federal administration and/or agencies, such as the Centers for Medicare & Medicaid Services, or CMS, have announced a number of demonstration projects, recommendations and proposals to implement various elements described in the drug pricing blueprint. CMS, the federal agency responsible for administering Medicare and overseeing state Medicaid programs and Health Insurance Marketplaces, has substantial power to implement policy changes or demonstration projects that can quickly and significantly affect how drugs, including our products, are covered and reimbursed. For example, in November 2020, former President Trump announced the interim final rule to implement the Most Favored Nations drug pricing model seeking to tie Medicare payment rates to an international index price. This final rule was subsequently rescinded by CMS.

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Additionally, a number of Congressional committees have also held hearings and evaluated proposed legislation on drug pricing and payment policy which may affect our business. For example, in July 2019, the Senate Finance Committee advanced a bill that in part would penalize pharmaceutical manufacturers for increasing drug list prices covered by Medicare Part B and Part D, faster than the rate of inflation, and cap out-of-pocket expenses for Medicare Part D beneficiaries. Several other proposals have been introduced that, if enacted and implemented, could affect access to and sales of our and our partners’ products, allow the federal government to engage in price negotiations on certain drugs, and allow importation of prescription medication from Canada or other countries. For example, in August 2022, “The Inflation Reduction Act of 2022” was enacted which will, among other things, allow and require the federal government to negotiate prices for some drugs covered under Medicare Part B and Part D, require drug companies to pay rebates to Medicare if prices rise faster than inflation for drugs used by Medicare beneficiaries and cap out-of-pocket spending for individuals enrolled in Medicare Part D.

In this dynamic environment, we are unable to predict which or how many federal policy, legislative or regulatory changes may ultimately be enacted. To the extent federal government initiatives decrease or modify the coverage or reimbursement available for our or our partners’ products, limit or impact our decisions regarding the pricing of biopharmaceutical products or otherwise reduce the use of our or our partners’ U.S. products, such actions could have a material adverse effect on our business and results of operations.

Furthermore, individual states are considering proposed legislation and have become increasingly aggressive in passing legislation and implementing regulations designed to control pharmaceutical product pricing, including price or patient reimbursement constraints, discounts, restrictions on certain product access, importation from other countries and bulk purchasing. Legally mandated price controls on payment amounts by third-party payers or other restrictions could negatively and materially impact our revenues and financial condition. We anticipate that we may encounter similar regulatory and legislative issues in most other countries outside the U.S.

In addition, private payers in the U.S., including insurers, pharmacy benefit managers (PBMs), integrated healthcare delivery systems, and group purchasing organizations, are continuously seeking ways to reduce drug costs. Many payers have developed and continue to develop ways to shift a greater portion of drug costs to patients through, for example, limited benefit plan designs, high deductible plans and higher co-pay or coinsurance obligations. Consolidation in the payer space has also resulted in a few large PBMs and insurers which place greater pressure on pricing and utilization negotiations for our and our partners’ products in the U.S., increasing the need for higher discounts and rebates and limiting patient access and utilization. Ultimately, additional discounts, rebates and other price reductions, fees, coverage and plan changes, or exclusions imposed by these private payers on our and our partners’ products could have an adverse event on product sales, our business and results of operations.

To help patients afford certain of our products, we offer discount, rebate, and co-pay coupon programs. CMS recently has issued a regulation imposing additional obligations on manufacturers in order to continue excluding such programs from government pricing calculations to avoid payment of increased Medicaid rebates. In recent years, other pharmaceutical manufacturers have been named in class action lawsuits challenging the legality of their co-pay programs under a variety of federal and state laws. Our co-pay coupon programs could become the target of similar lawsuits or insurer actions. It is possible that the outcome of litigation against other manufacturers, changes in insurer policies regarding co-pay coupons, and/or the introduction and enactment of new legislation or regulatory action could restrict or otherwise negatively affect these programs.

We also face risks relating to the reporting of pricing data that affects the reimbursement of and discounts provided for our products. Government price reporting regulations are complex and may require a manufacturer to update certain previously submitted data. If our submitted pricing data is incorrect, we may become subject to substantial fines and penalties or other government enforcement actions, which could have a material adverse effect on our business and results of operations. In addition, as a result of restating previously reported price data, we also may be required to pay additional rebates and provide additional discounts.

We face competition and rapid technological change that could result in the development of products by others that are competitive with our proprietary and partnered products, including those under development.

Our proprietary and partnered products have numerous competitors in the U.S. and abroad including, among others, major pharmaceutical and specialized biotechnology firms, universities and other research institutions that have developed competing products. Many of these competitors have substantially more resources and product development, manufacturing and marketing experience and capabilities than we do. The competitors for Hylenex recombinant include, but are not limited to, Amphastar Pharmaceuticals, Inc.’s product, Amphadase®, a bovine (bull) hyaluronidase. For our ENHANZE technology, such competitors may include major pharmaceutical and specialized biotechnology firms. These competitors may develop technologies and products that are more effective, safer, or less costly than our current or future proprietary and partnered products and product candidates or that could render our and our partners’ products, technologies and product candidates obsolete or noncompetitive.

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General Risks

If we are unable to attract, hire and retain key personnel our business could be negatively affected.

Our success depends on the performance of key employees with relevant experience. We depend substantially on our ability to hire, train, motivate and retain high quality personnel. If we are unable to identify, hire and retain qualified personnel, our ability to support current and future alliances with strategic partners could be adversely impacted. Our use of domestic and international third-party contractors, consultants and staffing agencies also subjects us to potential co-employment liability claims.

Furthermore, if we were to lose key personnel, we may lose some portion of our institutional knowledge and technical know-how, potentially causing a disruption or delay in one or more of our partnered development programs until adequate replacement personnel could be hired and trained. In addition, we do not have key person life insurance policies on the lives of any of our employees which would help cover the cost associated with the loss of key employees.

Our operations might be interrupted by the occurrence of a natural disaster or other catastrophic event.

Our operations, including laboratories, offices and other research facilities, are headquartered in San Diego, California. We have additional facilities in Ewing, New Jersey and Minnetonka, Minnesota. We depend on our facilities and on our collaborators, contractors and vendors for the continued operation of our business. Natural disasters or other catastrophic events, pandemics, interruptions in the supply of natural resources, political and governmental changes, wildfires and other fires, tornadoes, floods, explosions, actions of animal rights activists, earthquakes and civil unrest could disrupt our operations or those of our partners, contractors and vendors. Even though we believe we carry commercially reasonable business interruption and liability insurance, and our contractors may carry liability insurance that protect us in certain events, we may suffer losses as a result of business interruptions that exceed the coverage available under our and our contractors’ insurance policies or for which we or our contractors do not have coverage. Any natural disaster or catastrophic event could have a significant negative impact on our operations and financial results. Moreover, any such event could delay our partners’ research and development programs.

Cyberattacks, security breaches or system breakdowns may disrupt our operations and harm our operating results and reputation.

We and our partners are subject to increasingly sophisticated attempts to gain unauthorized access to our information technology storage and access systems and are devoting resources to protect against such intrusion. Cyberattacks could render us or our partners unable to utilize key systems or access important data needed to operate our business. The wrongful use, theft, deliberate sabotage or any other type of security breach with respect to any of our or any of our vendors and partners’ information technology storage and access systems could result in the breakdown or other service interruption, or the disruption of our ability to use such systems or disclosure or dissemination of proprietary and confidential information that is electronically stored, including intellectual property, trade secrets, financial information, regulatory information, strategic plans, sales trends and forecasts, litigation materials or personal information belonging to us, our staff, our patients, customers and/or other business partners which could result in a material adverse impact on our business, operating results and financial condition. We continue to invest in monitoring, and other security and data recovery measures to protect our critical and sensitive data and systems. However, these may not be adequate to prevent or fully recover systems or data from all breakdowns, service interruptions, attacks or breaches of our systems. In addition, our cybersecurity insurance may not be sufficient to cover us against liability related to any such breaches. Furthermore, any physical break-in or trespass of our facilities could result in the misappropriation, theft, sabotage or any other type of security breach with respect to our proprietary and confidential information, including research or clinical data or damage to our research and development equipment and assets. Such adverse effects could be material and irrevocable to our business, operating results, financial condition and reputation.

Item 1B.Unresolved Staff Comments

None.

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Item 1C.    Cybersecurity

Our information technology systems (“IT Systems”) play a central role in running nearly all aspects of our business operations. Our IT Systems are used for a variety of critical business functions including, but not limited to, internal and external communications, managing our documents and records, supporting functional and enterprise business processes and providing shared work environments across various business functions. Therefore, responding efficiently and effectively to cybersecurity incidents and threats is an important component of our enterprise risk management strategy. In order to respond to such incidents and threats, we have implemented a carefully designed Incident Response Plan (“IRP”).

Cybersecurity Risk Management and Strategy

The IRP provides our management and information technology personnel with processes and procedures for assessing, identifying, managing and escalating material risks from cybersecurity threats which have been integrated into our overall risk management processes. For example, our enterprise risk management processes involve the identification of events that may arise in the course of operating our business and the potential impact of such events on our business. We have identified and prioritized cybersecurity events as requiring increased managerial focus and urgency in actions taken to mitigate cybersecurity risks due to the potential impact such events could have on our business. Although the risks from cybersecurity threats have not materially affected our business strategy, results of operations or financial condition, it is possible that a cybersecurity incident resulting in a serious compromise of our IT Systems or a demand for payment to restore our IT Systems, could have a material adverse effect on us by negatively impacting our ability to operate our business effectively and by diverting the attention of our management and other resources, including financial resources, to address the cybersecurity incident. Despite our efforts to mitigate the risks associated with cybersecurity threats, we cannot eliminate all such risks or provide assurance that we have not experienced undetected cybersecurity incidents. For additional information about these risks, see Part I, Item 1A, “Risk Factors” in this Annual Report on Form 10-K.

In connection with our processes for assessing, identifying and managing risk from cybersecurity, we engage various third parties to assist in managing these processes including:

•Outside cybersecurity legal counsel to assist in updating our IRP and for consultation and coordination with other third parties in the event of a cyber incident;

•Cybersecurity vendors that would perform various investigation services in the event of a cyber incident including assisting in determining the type of attack and impact to our information technology network, maintaining cybersecurity vigilance and assisting with the recovery and restoration of any impacted IT System services;

•Cybersecurity experts who would, in the event of a cybersecurity incident, assist with validation of the incident; and

•Vendors that would provide breach response services such as communications, notification to third parties and credit monitoring.

In addition to our IRP, we have also implemented processes to oversee and identify risks from cybersecurity threats associated with our use of third-party service providers. For example, where appropriate, we seek to negotiate contractual terms with certain third-party service providers that impose obligations on such service providers with the goal of protecting our confidential information.

Cybersecurity Governance

Our Incident Response Team has the primary responsibility of assessing and managing risks from cybersecurity threats and implementing the various stages of our IRP set forth above. The Incident Response Team is comprised of the following IT Systems management personnel and members of senior management:

•Chief Information Officer (“CIO”) – Our CIO has over forty years of information technology experience across a wide range of industry sectors including insurance, financial and life sciences and forty years in life science research and development information security. For the past four years, our CIO has had oversight of our cybersecurity strategy and building out our cybersecurity capabilities and infrastructure in response to the growing threat from potential cyber security incidents on our IT Systems. Our CIO has also led the initiative to integrate our cybersecurity management

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into our overall enterprise risk management strategy. Our CIO has an NACD CERT certificate in cybersecurity oversight;

•Associate Director, Information Technology (“IT Security Director”) – Our IT Security Director has approximately twenty years of relevant information technology experience including at least fifteen years of hands-on experience working in various cybersecurity domains, including asset and network security and architecture, identity access management, disaster recovery and business continuity. Our IT Security Director’s responsibilities include serving as the lead for cybersecurity under the direction of the CIO and maturing our cybersecurity program across all cybersecurity domains, including security and risk management. Our IT Security Director is a Certified Information Systems Security Professional and has an NACD CERT certificate in cybersecurity oversight;

•Senior Vice President, Chief Legal Officer – Our Chief Legal Officer oversees our enterprise risk management strategy and serves as the executive management representative on our Incident Response Team; and

•Vice President, Business Continuity & Sustainable Operations (“VP Business Continuity”) – Our VP Business Continuity has responsibility for overseeing our Business Continuity Plan which incorporates our IRP. Our VP Business Continuity has over 15 years leading the business continuity programs for various companies and has training on ISO 22301 (the Business Continuity ISO Standard).

Under its committee charter, the Audit Committee of the Board of Directors (the “Audit Committee”) is responsible for discussing with senior management our policies with respect to risk assessment and risk management and for discussing with management our financial risk exposures and the steps management has taken to monitor and control such exposures. In particular, the Audit Committee oversees our cybersecurity strategy designed to identify, assess and mitigate cybersecurity risks, and reviews our cybersecurity and other information technology risks, controls and procedures, and receives periodic updates from management on cybersecurity regarding the adequacy and effectiveness of our cybersecurity measures. In fulfilling this oversight responsibility, the Audit Committee receives a periodic update of our cybersecurity strategy. Included in this review is a thorough discussion of the risks from cybersecurity threats including the potential impact of such threats to our operations. Specifically, with respect to cybersecurity risks, Incident Response Team members report to the Audit Committee on the (i) potential impact of the risk to the business, (ii) our current capabilities in managing such risks, (iii) the urgency for action in managing such risks and (iv) the outlook for a potential impact on us as a result of the risk. The Audit Committee also receives reports from members of the Incident Response Team on our mitigation efforts to address cybersecurity risks.

We have also instituted a separate process for communicating with the Audit Committee regarding any risks from an actual cybersecurity threat in the event we are the target of a specific cybersecurity incident. As part of our response to such an incident, members of the Incident Response Team would provide an initial awareness communication of the incident to our Chief Executive Officer who would in turn inform the Chairman of our Board of Directors (“Board Chair”) and the Chair of the Audit Committee (“Audit Committee Chair”). Following an initial assessment of the incident by senior management and IT Systems personnel, we would provide a follow-up communication to the Board Chair and Audit Committee Chair and determine whether further escalation to the full Board of Directors is warranted.

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Item 2.Properties

Our properties consist of leased office, laboratory, warehouse and assembly facilities. Our administrative offices and research facilities are located in San Diego, California. We also lease a building in Minnetonka, Minnesota consisting of office, assembly operations, and warehousing space, and have a small administrative office in Ewing, New Jersey. As of December 31, 2023, we leased an aggregate of approximately 162,000 square feet of space. We believe our facilities are adequate for our current and near-term needs.

Item 3.Legal Proceedings

From time to time, we may be involved in disputes, including litigation, relating to claims arising out of operations in the normal course of our business. Any of these claims could subject us to costly legal expenses and, while we generally believe that we have adequate insurance to cover many different types of liabilities, our insurance carriers may deny coverage or our policy limits may be inadequate to fully satisfy any damage awards or settlements. If this were to happen, the payment of any such awards could have a material adverse effect on our consolidated results of operations and financial position. Additionally, any such claims, whether or not successful, could damage our reputation and business. We currently are not a party to any legal proceedings, the adverse outcome of which, in our opinion, individually or in the aggregate, would have a material adverse effect on our consolidated results of operations or financial position.

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

Our common stock is listed on the NASDAQ Global Select Market under the symbol “HALO.” As of February 14, 2024, we had approximately 72,264 stockholders of record and beneficial owners of our common stock.

Dividends

We have never declared or paid any dividends on our common stock. We currently intend to retain available cash for funding operations, stock repurchases and other capital initiatives; therefore, we do not expect to pay any dividends on our common stock in the foreseeable future. Any future determination to pay dividends on our common stock will be at the discretion of our Board of Directors and will depend upon, among other factors, our results of operations, financial condition, capital requirements, contract restrictions, business prospects and other factors our Board of Directors may deem relevant.

Purchase of Equity Securities by the Issuer

In December 2021, our Board of Directors authorized a capital return program to repurchase up to $750.0 million of our outstanding common stock over a three-year period. During 2021, we repurchased 3.9 million shares of common stock for $150.0 million at an average price of $38.51. During 2022, we repurchased 4.5 million shares of common stock for $200.0 million at an average price of $44.44. During 2023, excluding the shares we received in the Accelerated Share Repurchase (“ASR”), we repurchased 4.2 million shares of common stock for $150.0 million at an average price of $36.01. We repurchased a total of 12.6 million shares for $500.0 million at an average price per share of $39.81 excluding the 5.5 million shares we received under the ASR in November 2023.

We accelerated the initiation of our planned 2024 share repurchases and in November 2023, we entered into an ASR agreement with Bank of America to accelerate the remaining $250.0 million of share repurchases under the approved capital return program. Pursuant to the agreement, at the inception of the ASR, we paid $250.0 million to Bank of America and took initial delivery of 5.5 million shares.

In February 2024, our Board of Directors authorized a new capital return program to repurchase up to $750.0 million of our outstanding common stock.

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Stock Performance Graph and Cumulative Total Return

Notwithstanding any statement to the contrary in any of our previous or future filings with the SEC, the following information relating to the price performance of our common stock shall not be deemed to be “filed” with the SEC or to be “soliciting material” under the Securities Exchange Act of 1934, as amended, or the Exchange Act, and it shall not be deemed to be incorporated by reference into any of our filings under the Securities Act of 1933, as amended, or the Exchange Act, except to the extent we specifically incorporate it by reference into such filing.

The graph below compares Halozyme Therapeutics, Inc.’s cumulative five-year total shareholder return on common stock with the cumulative total returns of the NASDAQ Composite Index and the NASDAQ Biotechnology Index. The graph tracks the performance of a $100 investment in our common stock and in each of the indexes (with the reinvestment of all dividends) from December 31, 2018 to December 31, 2023. The historical stock price performance included in this graph is not necessarily indicative of future stock price performance.

	12/31/2018	12/31/2019	12/31/2020	12/31/2021	12/31/2022	12/31/2023
Halozyme Therapeutics, Inc.	$100	$121	$292	$275	$389	$253
NASDAQ Composite	$100	$137	$198	$242	$163	$236
NASDAQ Biotechnology	$100	$125	$158	$158	$142	$149

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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

In addition to historical information, the following discussion contains forward-looking statements that are subject to risks and uncertainties. Actual results may differ substantially from those referred to herein due to a number of factors, including but not limited to risks described in the Part I, Item 1A, Risks Factors, and elsewhere in this Annual Report on Form 10-K. References to “Notes” are Notes included in our Notes to Consolidated Financial Statements.

Overview

Halozyme Therapeutics, Inc. is a biopharmaceutical company advancing disruptive solutions to improve patient experiences and outcomes for emerging and established therapies.

As the innovators of ENHANZE ® drug delivery technology (“ENHANZE”) with our proprietary enzyme, rHuPH20, our commercially validated solution is used to facilitate the subcutaneous (“SC”) delivery of injected drugs and fluids with the goal of reducing the treatment burden for patients. We license our technology to biopharmaceutical companies to collaboratively develop products that combine ENHANZE® with our partners’ proprietary compounds. We also develop, manufacture and commercialize, for ourselves or with our partners, drug-device combination products using our advanced auto-injector technologies that are designed to provide commercial or functional advantages such as improved convenience, reliability and tolerability, and enhanced patient comfort and adherence.

Our ENHANZE partners’ approved products and product candidates are based on rHuPH20, our patented recombinant human hyaluronidase enzyme. rHuPH20 works by breaking down hyaluronan (“HA”), a naturally occurring carbohydrate that is a major component of the extracellular matrix of the SC space. This temporarily reduces the barrier to bulk fluid flow allowing for improved and more rapid SC delivery of high dose, high volume injectable biologics, such as monoclonal antibodies and other large therapeutic molecules, as well as small molecules and fluids. We refer to the application of rHuPH20 to facilitate the delivery of other drugs or fluids as ENHANZE. We license the ENHANZE technology to form collaborations with biopharmaceutical companies that develop or market drugs requiring or benefiting from injection via the SC route of administration. In the development of proprietary intravenous (“IV”) drugs combined with our ENHANZE technology, data have been generated supporting the potential for ENHANZE to reduce patient treatment burden, as a result of shorter duration of SC administration with ENHANZE compared to IV administration. ENHANZE may enable fixed-dose SC dosing compared to weight-based dosing typically required for IV administration, extend the dosing interval for drugs that are already administered subcutaneously and potentially allow for lower rates of infusion-related reactions. ENHANZE may enable more flexible treatment options such as home administration by a healthcare professional or potentially the patient or caregiver. Lastly, certain proprietary drugs co-formulated with ENHANZE have been granted additional exclusivity, extending the patent life of the product beyond the patent expiry of the proprietary IV drug.

We currently have ENHANZE collaborations and licensing agreements with F. Hoffmann-La Roche, Ltd. and Hoffmann-La Roche, Inc. (“Roche”), Takeda Pharmaceuticals International AG and Baxalta US Inc. (“Takeda”), Pfizer Inc. (“Pfizer”), Janssen Biotech, Inc. (“Janssen”), AbbVie, Inc. (“AbbVie”), Eli Lilly and Company (“Lilly”), Bristol Myers Squibb Company (“BMS”), argenx BVBA (“argenx”), ViiV Healthcare (the global specialist HIV Company majority owned by GlaxoSmithKline) (“ViiV”), Chugai Pharmaceutical Co., Ltd (“Chugai”) and Acumen Pharmaceuticals, Inc. (“Acumen”). In addition to receiving upfront licensing fees from our ENHANZE collaborations, we are entitled to receive event and sales-based milestone payments, revenues from the sale of bulk rHuPH20 and royalties from commercial sales of approved partner products co-formulated with ENHANZE. We currently earn royalties from four of these collaborations, including royalties from sales of one product from the Takeda collaboration, four products from the Roche collaboration, one product from the Janssen collaboration and one product from the argenx collaboration.

We have commercialized auto-injector products with several pharmaceutical companies including Teva Pharmaceutical Industries, Ltd. (“Teva”) and Otter Pharmaceuticals, LLC (“Otter”). We have development programs including auto-injectors with Idorsia Pharmaceuticals Ltd. (“Idorsia”).

Our commercial portfolio of proprietary products includes Hylenex®, utilizing rHuPH20, and our specialty product XYOSTED®, utilizing our auto-injector technology.

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Our 2023 and recent key events are as follows:

Roche

•In January 2024, Roche received EC marketing authorization for Tecentriq SC for all approved indications of Tecentriq IV for multiple cancer types.

•In September 2023, Chugai, a member of the Roche Group, announced that it had obtained regulatory approval for Phesgo from the MHLW in Japan. We are entitled to receive royalties for Phesgo® sales in Japan under our agreement with Roche.

•In September 2023, Roche informed us that there will be a delay in the projected launch timing for Tecentriq SC in the U.S. as a result of Roche’s need to update CMC processes for Tecentriq SC. Roche expects a potential launch of Tecentriq SC in the U.S. in 2024.

•In August 2023, Roche announced the approval of Tecentriq SC with ENHANZE by the MHRA in Great Britain, resulting in an $8.0 million milestone payment to us and the right to receive royalties on net product sales.

•In July 2023, Roche announced that the Phase III OCARINA II trial evaluating ocrelizumab SC with ENHANZE as a twice a year 10-minute SC injection met its primary and secondary endpoints in patients with relapsing forms of MS, RMS or PPMS. Subsequently, Roche filed with regulatory authorities in the EU, UK and U.S.

argenx

•In February 2024, argenx announced that the FDA had accepted for priority review a sBLA for VYVGART Hytrulo for the treatment of CIDP. The application has been granted a PDUFA action date of June 21, 2024. In July 2023, argenx reported positive data from the ADHERE study evaluating VYVGART Hytrulo with ENHANZE in adults with CIDP. The study met its primary endpoint resulting in a 61% reduction in risk of relapse compared to placebo.

•In January 2024, argenx received regulatory approval in Japan for VYVDURA (efgartigimod alfa and hyaluronidase-qvfc) co-formulated with ENHANZE for the treatment of adult patients with gMG including options for self-administration, resulting in a $5.0 million milestone payment.

•In November 2023, argenx received EC approval of VYVGART SC (efgartigimod alfa and hyaluronidase-qvfc) co-formulated with ENHANZE for the treatment of gMG in adult patients who are AChR antibody positive, and in December 2023 VYVGART SC was made available to patients, resulting in $23.0 million in milestone payments. The European approval of VYVGART SC provides the option for patient self-administration.

•In September 2023, Zai Lab limited (argenx commercial partner for China) announced the CDE of the NMPA granted Breakthrough Therapy Designation for efgartigimod alfa injection (SC injection) (efgartigimod SC) for the treatment of patients with CIDP. The Breakthrough Therapy Designation for efgartigimod SC was supported by data from both global and Chinese patients enrolled in the ADHERE study.

•In June 2023, argenx received U.S. FDA approval for VYVGART Hytrulo injection with ENHANZE for SC use for the treatment of gMG in adult patients who are AChR antibody positive and in July 2023 VYVGART Hytrulo was made available to patients, resulting in $33.0 million in milestone payments and the right to receive royalties on net product sales.

Janssen

•In January 2024, Janssen announced submission of a sBLA to the FDA seeking approval of a new indication for DARZALEX FASPRO in combination with D-VRd for induction and consolidation treatment and with D-R for maintenance treatment of adult patients who are NDMM and are eligible for ASCT.

ViiV

•In August 2023, ViiV initiated a Phase 2b study to evaluate the efficacy, safety, PK and tolerability of VH3810109 (N6LS) administered subcutaneously with ENHANZE in combination with cabotegravir.

•In August 2023, ViiV achieved a development milestone resulting in a $5.0 million milestone payment to us.

Takeda

•In February 2024, Takeda submitted a New Drug Application in Japan seeking approval for TAK-771, subcutaneous 10% human immunoglobulin with ENHANZE, for treatment of primary immunodeficiency.

•In January 2024, Takeda received FDA and EC approval for HYQVIA for the treatment of CIDP as maintenance therapy to prevent the relapse of neuromuscular disability and impairment in adults.

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•In October 2023, Takeda initiated a Phase 2/3 study to evaluate PK, safety, and tolerability of subcutaneous administration of TAK-881 in adult and pediatric participants with PIDD.

•In April 2023, Takeda announced that the U.S. FDA approved a sBLA to expand the use of HYQVIA to treat primary immunodeficiency in children.

BMS

•In October 2023, BMS reported positive topline results from the Phase 3 CheckMate-67T trial evaluating a SC formulation of Opdivo (nivolumab) with ENHANZE in patients with ccRCC who have received prior systemic therapy. The study met its co-primary PK endpoints and a key secondary endpoint.

•In March 2023, BMS initiated a Phase 3 trial to demonstrate the drug exposure levels of nivolumab and relatlimab fixed-dose combination with ENHANZE is not inferior to IV administration in participants with previously untreated metastatic or unresectable melanoma (RELATIVITY-127).

Acumen

•In November 2023, we and Acumen entered into a global collaboration and non-exclusive license agreement that provides Acumen access to ENHANZE for a single target. Acumen intends to explore the potential use of ENHANZE for ACU193, Acumen’s clinical stage monoclonal antibody candidate to target Amyloid-β Oligomers for treatment of early Alzheimer’s disease.

Teva

•In November 2023, Teva announced FDA approval of the generic version of Forteo, featuring our multi-dose auto-injector pen platform for the treatment of osteoporosis among certain women and men.

Corporate

•In February 2024, we announced our third capital return program to repurchase up to $750.0 million of our outstanding common stock.

•During 2023, we repurchased 4.2 million shares of common stock in open market transactions for $150.0 million at an average price per share of $36.01. In November 2023, we accelerated the initiation of our planned 2024 share repurchases and entered into an ASR agreement with Bank of America to accelerate the remaining $250.0 million of share repurchases under the $750.0 million approved capital return program. We paid $250.0 million to Bank of America and took initial delivery of 5.5 million shares.

•In August 2023, we announced positive results of a clinical study with our high-volume auto-injector demonstrating SC administration of 10 mL of a representative biologic product co-formulated with our ENHANZE® drug delivery technology in approximately 30 seconds. The results were presented at the 13th annual Partnership Opportunities in Drug Delivery (“PODD”) conference in October 2023.

•In January 2023, we elected to redeem all of our remaining outstanding 1.25% convertible senior notes due 2024. In March 2023, the outstanding amount of the 2024 Convertible Notes converted in full and we paid $13.5 million in cash and issued 288,886 shares.

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Results of Operations

Comparison of Years Ended December 31, 2023 and 2022

Royalties – Royalties were as follows (in thousands):

	Year Ended December 31,
	2023		2022		Change		Percentage Change
Royalties	$	447,865	$	360,475	$	87,390	24	%

The increase in royalties was primarily driven by continued sales uptake of DARZALEX SC by Janssen and Phesgo by Roche in all geographies and contributions from new device royalty revenue as a result of the Antares acquisition in May 2022, partially offset by slightly lower sales of Herceptin SC and MabThera SC by Roche. We expect royalty revenue to continue to grow as a result of our 2020 and 2023 ENHANZE partner product launches, offsetting the ongoing impact from IV biosimilars on pricing of mature partner products delivered SC with ENHANZE and the expected royalty rate reduction in March of 2024 for certain sales of DARZALEX SC outside of the U.S.

Product Sales, Net – Product sales, net were as follows (in thousands):

	Year Ended December 31,
	2023		2022		Dollar Change		Percentage Change
Sales of proprietary products	$	130,834	$	72,849	$	57,985	80	%
Sales of bulk rHuPH20	115,442		82,084		33,358		41	%
Sales of device partnered products	54,578		36,097		18,481		51	%
Total product sales, net	$	300,854	$	191,030	$	109,824	57	%

The increase in product sales was primarily due to contributions from our proprietary and device partnered products as the result of the Antares acquisition in May 2022 and higher sales of bulk rHuPH20 driven by partner demand. We expect sales of our proprietary products will grow in future years as we continue to gain market share in the TRT market. We expect product sales of bulk rHuPH20 and device partnered products to fluctuate in future periods based on the needs of our partners.

Revenues Under Collaborative Agreements – Revenues under collaborative agreements were as follows (in thousands):

	Year Ended December 31,
	2023		2022		Dollar Change		Percentage Change
Upfront license fees, license fees for the election of additional targets, event-based payments, license maintenance fees and amortization of deferred upfront and other license fees:
Upfront license and target nomination fees	$	2,000	$	30,000	$	(28,000)	(93)	%
Event-based development milestones and regulatory milestones and other fees	69,000		59,000		10,000		17	%
Sales-based milestone	—		10,000		(10,000)		(100)	%
Device licensing and development revenue	9,534		9,611		(77)		(1)	%
Total revenues under collaborative agreements	$	80,534	$	108,611	$	(28,077)	(26)	%

The decrease in revenue from license fees was primarily due to the timing of milestones driven by partner activities. Revenue from upfront licenses fees, license fees for the election of additional targets, license maintenance fees and other license fees and event-based payments vary from period to period based on our ENHANZE collaboration activity. We expect these revenues to continue to fluctuate in future periods based on our partners’ ability to meet various clinical and regulatory milestones set forth in such agreements and our ability to obtain new collaborative agreements.

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Operating expenses – Operating expenses were as follows (in thousands):

	Year Ended December 31,
	2023		2022		Change		Percentage Change
Cost of sales	$	192,361	$	139,304	$	53,057	38	%
Amortization of intangibles	73,773		43,148		30,625		71	%
Research and development	76,363		66,607		9,756		15	%
Selling, general and administrative	149,182		143,526		5,656		4	%

Cost of Sales – Cost of sales consists primarily of raw material costs, third-party manufacturing costs, fill and finish costs, freight costs, internal costs and manufacturing overhead associated with the production of our proprietary products, device partnered products and bulk rHuPH20. The increase in cost of sales was primarily due to an increase in sales of our proprietary and device partnered products as a result of the Antares acquisition in May 2022 and higher bulk rHuPH20 sales.

Amortization of intangibles – The increase in amortization of intangibles expense was due to the recognition of a full year amortization expense during the current year for our acquired intangible assets and an impairment charge of $2.5 million to fully impair the TLANDO product rights intangible asset as a result of the license agreement termination notice provided to Lipocine in September 2023.

Research and Development – Research and development expenses consist of external costs, salaries and benefits, and allocation of facilities and other overhead expenses related to research manufacturing, preclinical and regulatory activities related to our collaborations, and our development platforms. The increase in research and development expenses was primarily due to an increase in compensation expense related to the ongoing combined larger workforce from the Antares acquisition to support the device platform in regulatory, quality and manufacturing, as well as planned investments in ENHANZE, partially offset by one-time transaction costs incurred in the prior year.

Selling, General and Administrative – Selling, general and administrative (“SG&A”) expenses consist primarily of salaries and related costs for personnel in executive, selling and administrative functions as well as professional fees for legal and accounting, business development, commercial operations support for proprietary products and alliance management and marketing support for our collaborations. The increase in SG&A expenses was primarily due to an increase in compensation expense related to the ongoing combined larger workforce, including the addition of commercial resources in sales and marketing for TRT products, partially offset by one-time transaction costs incurred in the prior year.

Investment and other income (expense), net - Investment and other income (expense), net was as follows (in thousands):

	Year Ended December 31,
	2023		2022		Change		Percentage Change
Investment and other income, net	$	16,317	$	1,046	$	15,271	1,460	%

Investment and other income (expense), net consists primarily of interest income on our cash, cash-equivalent and marketable securities. The increase in investment and other income, net was primarily due to a significant increase in market interest rates as well as an increase in the average invested balance.

Interest Expense – Interest expense was as follows (in thousands):

	Year Ended December 31,
	2023		2022		Change		Percentage Change
Interest expense	$	18,762	$	16,947	$	1,815	11	%

The modest increase in interest expense was primarily due to an increase in interest expense related to our 2028 Convertible Notes, partially offset by the repayment of our 2022 Term Facility and outstanding Revolving Credit Facility during the third quarter of 2022 and a reduction in interest expense related to our 2024 Convertible Notes which were converted in the first quarter of 2023.

Income Taxes – Income taxes were as follows (in thousands):

	Year Ended December 31,
	2023		2022		Change		Percentage Change
Income tax expense	$	66,735	$	46,789	$	19,946	43	%

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The increase in income tax expense was primarily due to higher income before taxes recognized during the current year, partially offset by federal research and development credits.

Comparison of Years Ended December 31, 2022 and 2021

For discussion related to changes in financial condition and the results of operations for the year ended December 31, 2022 compared to the year ended December 31, 2021, refer to Part II - Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022, which was filed with the SEC on February 21, 2023.

Liquidity and Capital Resources

Overview

Our principal sources of liquidity are our existing cash, cash equivalents and available-for-sale marketable securities. As of December 31, 2023, we had cash, cash equivalents and marketable securities of $336.0 million. We believe that our current cash, cash equivalents and marketable securities will be sufficient to fund our operations for at least the next 12 months. We expect to fund our operations going forward with existing cash resources, anticipated revenues from our existing collaboration agreements and cash that we may raise through future financing transactions. We may raise cash through any one of the following financing vehicles: (i) new collaborative agreements; (ii) expansions or revisions to existing collaborative relationships; (iii) private financings; (iv) other equity or debt financings; (v) monetizing assets; and/or (vi) the public offering of securities.

We may, in the future, draw on our existing line of credit or offer and sell additional equity, debt securities and warrants to purchase any of such securities, either individually or in units to raise capital for additional working capital, capital expenditures, share repurchases, acquisitions or for other general corporate purposes. Our material cash requirements include the following contractual and other obligations.

Long-term debt

Our long-term debt consists of convertible notes. The aggregate principal amount of our convertible notes is $1,525.0 million. Future interest payments associated with our convertible notes total $39.7 million, with $9.2 million payable within 12 months.

Leases

We have lease arrangements related to our office and research facilities and certain vehicles under non-cancelable operating leases. As of December 31, 2023, we have lease payment obligations of $40.7 million, with $6.6 million payable within 12 months.

Third-party manufacturing obligations

We have contracted with third-party manufacturers for the supply of bulk rHuPH20, fill/finish of Hylenex recombinant, other proprietary products and partnered products. Under these agreements, we are required to purchase certain quantities each year during the terms of the agreements. Contractual obligations for purchases of goods or services include agreements that are enforceable and legally binding to us and that specify all significant terms, including fixed or minimum quantities to be purchased; fixed, minimum or variable price provisions; and the approximate timing of the transaction. For obligations with cancellation provisions, the amounts disclosed were limited to the non-cancelable portion of the agreement terms or the minimum cancellation fee. As of December 31, 2023, we had third-party manufacturing obligations of $107.4 million, payable within 12 months.

Other purchase obligations and commitments

Purchase obligations represent an estimate of all open purchase orders and contractual obligations in the ordinary course of business for which we have not received the goods or services. As of December 31, 2023, we had other purchase obligations and other commitments of $20.3 million, with $19.1 million payable within 12 months.

The expected timing of payments of the obligations above is estimated based on information we have as of December 31, 2023. Timing of payments and actual amounts paid may be different, depending on the time of receipt of goods or services, or changes to agreed-upon amounts for some obligations.

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Our future capital uses and requirements and anticipated sources of funds to satisfy these requirements depend on numerous forward-looking factors. These factors may include, but are not limited to, the following:

•the costs of investments in our ENHANZE platform and auto-injector technology including development of new versions of rHuPH20 and auto-injector devices;

•the costs of filing, prosecuting, defending and enforcing any patent claims and other intellectual property rights;

•the costs to develop and validate additional manufacturing processes of rHuPH20, auto-injectors, and testosterone replacement therapies;

•the costs to expand the number of collaboration partner products developed and launched by partners including costs to scale-up manufacturing;

•the amount of royalties and milestones from our partners;

•the effect of competing technological and market developments;

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

•the extent to which we acquire or in-license new products, technologies or businesses and invest in development.

Cash Flows

	Year Ended December 31,
	2023		2022		Change
Net cash provided by operating activities	$	388,571	$	240,110	$	148,461
Net cash used in investing activities	(96,909)		(487,005)		390,096
Net cash (used in) provided by financing activities	(407,987)		362,371		(770,358)
Net (decrease) increase in cash, cash equivalents and restricted cash	$	(116,325)	$	115,476	$	(231,801)

Operating Activities

The increase in net cash provided by operations was primarily due to an increase in revenue and a decrease in working capital spend.

Investing Activities

The decrease in net cash used in investing activities was primarily due to the acquisition of Antares in the prior year, partially offset by a decrease in cash from the sale and maturity of marketable securities, an increase in purchases of marketable securities as we continue to invest excess cash, a decrease in proceeds from the sale of assets, and an increase in capital spend for the purchase of manufacturing equipment and new facility improvements.

Financing Activities

The increase in net cash used in financing activities was primarily due to $702.0 million in cash received in the prior year from the issuance of our 2028 Convertible Notes, $202.5 million increase in the repurchase of common stock and a $6.2 million reduction in net proceeds from the issuance of common stock under equity incentive plans. The increase was partially offset by $69.1 million cash paid for our Capped Call Transaction in the prior year, $64.0 million reduction in cash paid on the conversion of our 2024 Convertible Notes, and $7.1 million cash paid for debt issuance costs in the prior year.

Share Repurchases

In December 2021, our Board of Directors authorized a share repurchase program to repurchase up to $750.0 million of our outstanding common stock over a three-year period. In February 2024, our Board of Directors authorized a new capital return program to repurchase up to $750.0 million of our outstanding common stock. Refer to Note 10, Stockholders’ Equity, of our consolidated financial statements for additional information regarding our share repurchases.

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Long-Term Debt

1.00% Convertible Notes due 2028

In August 2022, we completed the sale of $720.0 million in aggregate principal amount of 1.00% Convertible Senior Notes due 2028 (the “2028 Convertible Notes” and collectively with the 2024 Convertible Notes and the 2027 Convertible Notes the “Convertible Notes”). The net proceeds in connection with the issuance of the 2028 Convertible Notes, after deducting the initial purchasers’ fee of $18.0 million, was approximately $702.0 million. We also incurred additional debt issuance costs totaling $1.0 million. Debt issuance costs and the initial purchasers’ fee are presented as a debt discount.

The 2028 Convertible Notes pay interest semi-annually in arrears on February 15th and August 15th of each year at an annual rate of 1.00%. The 2028 Convertible Notes are general unsecured obligations and rank senior in right of payment to all indebtedness that is expressly subordinated in right of payment to the 2028 Convertible Notes, rank equally in right of payment with all existing and future liabilities that are not so subordinated, are effectively junior to any secured indebtedness to the extent of the value of the assets securing such indebtedness and are structurally subordinated to all indebtedness and other liabilities (including trade payables) of our current or future subsidiaries. The 2028 Convertible Notes have a maturity date of August 15, 2028.

Holders may convert their 2028 Convertible Notes at their option only in the following circumstances: (1) during any calendar quarter commencing after the calendar quarter ending on December 31, 2022, if the last reported sale price per share of common stock exceeds 130% of the conversion price for each of at least 20 trading days during the 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter; (2) during the five consecutive business days immediately after any five consecutive trading day period (such five consecutive trading day period, the “measurement period”) in which the trading price per $1,000 principal amount of notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price per share of our common stock on such trading day and the conversion rate on such trading day; (3) upon the occurrence of certain corporate events or distributions on our common stock, as described in the offering memorandum for the 2028 Convertible Notes; (4) if we call such notes for redemption; and (5) at any time from, and including, February 15, 2028 until the close of business on the second scheduled trading day immediately before the maturity date. As of December 31, 2023, the 2028 Convertible Notes were not convertible.

Upon conversion, we will pay cash for the settlement of principal, and for the premium, if applicable, we will pay cash, deliver shares of common stock or a combination of cash and shares of common stock, at our election. The initial conversion rate for the 2028 Convertible Notes is 17.8517 shares of common stock per $1,000 in principal amount of 2028 Convertible Notes, equivalent to a conversion price of approximately $56.02 per share of our common stock. The conversion rate is subject to adjustment in some events but will not be adjusted for any accrued or unpaid interest.

0.25% Convertible Notes due 2027

In March 2021, we completed the sale of $805.0 million in aggregate principal amount of 0.25% Convertible Senior Notes due 2027 (the “2027 Convertible Notes”). The net proceeds in connection with the issuance of the 2027 Convertible Notes, after deducting the initial purchasers’ fee of $20.1 million, was approximately $784.9 million. We also incurred additional debt issuance costs totaling $0.4 million. Debt issuance costs and the initial purchasers’ fee are presented as a debt discount.

The 2027 Convertible Notes pay interest semi-annually in arrears on March 1st and September 1st of each year at an annual rate of 0.25%. The 2027 Convertible Notes are general unsecured obligations and rank senior in right of payment to all indebtedness that is expressly subordinated in right of payment to the 2027 Convertible Notes, rank equally in right of payment with all existing and future liabilities that are not so subordinated, are effectively junior to any secured indebtedness to the extent of the value of the assets securing such indebtedness and are structurally subordinated to all indebtedness and other liabilities (including trade payables) of our current or future subsidiaries. The 2027 Convertible Notes have a maturity date of March 1, 2027.

Holders may convert their 2027 Convertible Notes at their option only in the following circumstances: (1) during any calendar quarter commencing after the calendar quarter ending on June 30, 2021, if the last reported sale price per share of common stock exceeds 130% of the conversion price for each of at least 20 trading days during the 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter; (2) during the five consecutive business days immediately after any five consecutive trading day period (such five consecutive trading day period, the “measurement period”) in which the trading price per $1,000 principal amount of notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price per share of our common stock on such trading day and the conversion rate on such trading day; (3) upon the occurrence of certain corporate events or distributions on our common stock, as described in the offering memorandum for the 2027 Convertible Notes; (4) if we call such notes for redemption; and (5) at any time from, and including, September 1, 2026 until the close of business on the scheduled trading day immediately before the maturity date. As of December 31, 2023, the 2027 Convertible Notes were not convertible.

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Upon conversion, we will pay cash for the settlement of principal, and for the premium, if applicable, we will pay cash, deliver shares of common stock or a combination of cash and shares of common stock, at our election. The initial conversion rate for the 2027 Convertible Notes is 12.9576 shares of common stock per $1,000 in principal amount of 2027 Convertible Notes, equivalent to a conversion price of approximately $77.17 per share of our common stock. The conversion rate is subject to adjustment.

1.25% Convertible Notes due 2024

In November 2019, we completed the sale of $460.0 million in aggregate principal amount of 1.25% Convertible Senior Notes due 2024 (the “2024 Convertible Notes”). The net proceeds in connection with the issuance of the 2024 Convertible Notes, after deducting the initial purchasers’ fee of $12.7 million, was approximately $447.3 million. We also incurred debt issuance cost totaling $0.3 million. Debt issuance costs and the initial purchasers’ fee were presented as a debt discount.

In January 2021, we notified the note holders of our irrevocable election to settle the principal of the 2024 Convertible Notes in cash and for the premium, to deliver shares of common stock. The conversion rate for the 2024 Convertible Notes was 41.9208 shares of common stock per $1,000 in principal amount of 2024 Convertible Notes, equivalent to a conversion price of approximately $23.85 per share of our common stock. The conversion rate was subject to adjustment.

In March 2021, we completed a privately negotiated, induced conversion of $369.1 million principal amount of the 2024 Convertible Notes (“2021 Note Repurchases” or the “2021 Induced Conversion”). In connection with the 2021 Induced Conversion, we paid approximately $370.2 million in cash, which included principal and accrued interest, and issued approximately 9.08 million shares of our common stock representing the intrinsic value based on the contractual conversion rate and incremental shares as an inducement for conversion. As a result of the 2021 Induced Conversion, we recorded $21.0 million in induced conversion expense which was included in other income (expense) of our consolidated statements of income in 2021. The induced conversion expense represented the fair value of the common stock issued upon conversion in excess of the common stock issuable under the original terms of the 2024 Convertible Notes.

In August 2022, we completed a privately negotiated induced conversion of $77.4 million principal amount of the 2024 Convertible Notes (“2022 Note Repurchases” or the “2022 Induced Conversion”). In connection with the 2022 Induced Conversion, we paid approximately $77.6 million in cash, which included principal and accrued interest, and issued approximately 1.51 million shares of our common stock representing the intrinsic value based on the contractual conversion rate and incremental shares as an inducement for conversion. As a result of the 2022 Induced Conversion, we recorded $2.7 million in induced conversion expense which was included in other income (expense) of our consolidated statements of income in 2022. The induced conversion expense represented the fair value of the common stock issued upon conversion in excess of the common stock issuable under the original terms of the 2024 Convertible Notes.

In January 2023, we issued a notice for the redemption of 2024 Convertible Notes. Holders of the notes could convert their notes at any time prior to the close of the business day prior to the redemption date. In March 2023, holders of the notes elected to convert the 2024 Convertible Notes in full. In connection with the conversion, we paid approximately $13.5 million in cash which included principal and accrued interest, and issued 288,886 shares of our common stock representing the intrinsic value based on the contractual conversion rate.

Revolving Credit and Term Loan Facilities (May 2022)

In May 2022, in connection with the closing of the Antares acquisition, we entered into a credit agreement, which was subsequently amended, with Bank of America, N.A., as Administrative Agent, Swing Line Lender and an L/C Issuer, and the other lenders and L/C Issuers party thereto (the “2022 Credit Agreement), evidencing a credit facility (the “2022 Facility”) that provides for (i) a $350 million revolving credit facility (the “Revolving Credit Facility”) and (ii) a $250 million term loan facility (the “Term Facility”). Proceeds from a $120 million draw on the Revolving Credit Facility and the $250 million Term Facility were used to fund a portion of the Antares acquisition, repay Antares’ existing debt and pay fees and expenses in connection with the Antares acquisition. The 2022 Credit Agreement contains an expansion feature, which allows us, subject to certain conditions, to increase the aggregate principal amount of the 2022 Facility, provided we remain in compliance with underlying financial covenants on a pro forma basis including the consolidated interest coverage ratio and the consolidated net leverage ratio covenants set forth in the 2022 Credit Agreement. The 2022 Facility will mature on November 30, 2026 unless either the Revolving Credit Facility or the Term Facility is extended prior to such date in accordance with the 2022 Credit Agreement.

The Term Facility requires quarterly scheduled repayments of the term loans in each of the first, second, third and fourth years following the closing in annual amounts equal to 2.50%, 5.00%, 7.50% and 10.00% of the initial principal amount of the term loans, respectively. The term loans are also subject to mandatory prepayments from the proceeds of certain asset sales, subject to our right to reinvest the proceeds thereof.

Borrowings under the 2022 Facility bear interest, at our option, at a rate equal to an applicable margin plus: (a) the applicable Term Secured Overnight Financing Rate (“SOFR”) (which includes a SOFR adjustment of 0.10%), or (b) a base rate

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determined by reference to the highest of (1) the federal funds effective rate plus 0.50%, (2) the Bank of America prime rate, (3) the Term SOFR rate for an interest period of one month plus 1.10%, and (4) 1.00%. The margin for the 2022 Facility ranges, based on our consolidated total net leverage ratio, from 0.25% to 1.25% in the case of base rate loans and from 1.25% to 2.25% in the case of Term SOFR rate loans. In addition to paying interest on the outstanding principal under the 2022 Facility, we will pay (i) a commitment fee in respect of the unutilized commitments thereunder and (ii) customary letter of credit fees and agency fees. The commitment fees range from 0.15% to 0.35% per annum based on our consolidated net leverage ratio.

In August 2022, we entered into Amendment No. 1 to the Credit Agreement (the “Amendment”) among the Company, the Guarantors (as defined in the Credit Agreement), each L/C Issuer from time to time party thereto, Bank of America, N.A., as Administrative Agent (in such capacity, the “Administrative Agent”) and swing line lender (in such capacity, the “Swing Line Lender”), and each lender party thereto, which amends the Credit Agreement dated as of May 24, 2022 (the “Credit Agreement”) among the Company, the Guarantors, the Administrative Agent, the Swing Line Lender, each Lender and the L/C Issuers. The Amendment, among other things, increased the size of the Revolving Credit Facility from $350 million to $575 million. The terms of the revolving credit facility were otherwise unchanged. Concurrently with the entry into the Amendment, we repaid the entire outstanding term loan facility and repaid all outstanding loans under the revolving credit facility under the 2022 Credit Agreement.

As of December 31, 2023, the revolving credit facility was undrawn.

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Critical Accounting Estimates

The 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 (“U.S. GAAP”). The preparation of our consolidated financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses and related disclosure of contingent assets and liabilities. We review our estimates on an ongoing basis. We base our estimates on historical experience and on various other assumptions that we believe to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities. Actual results may differ from these estimates under different assumptions or conditions. Our significant accounting policies are outlined in Note 2, Summary of Significant Accounting Policies, to the consolidated financial statements included in the Annual Report on Form 10-K. We believe the following accounting policies to be critical to the judgments and estimates used in the preparation of our consolidated financial statements.

Revenue Recognition
Methodology	Judgment and Uncertainties	Effect if Actual Results Differ From Assumptions
For collaborative agreements, we are entitled to receive event-based payments subject to the collaboration partner's achievement of specified development and regulatory milestones. We recognize revenue when it is deemed probable that these milestones will be achieved, which could be in a period prior to its actual occurrence. At the end of each reporting period, we re-evaluate the probability of achievement of such milestones, and if necessary, adjust our estimate of the overall transaction price.	Revenue is recognized when we determine it is probable a milestone will be achieved. This assessment is based on our past experience with our collaboration partners, market insight and partner communication.	A revenue reversal will be required in the event it is determined that achievement of a milestone, previously deemed probable, will not occur. This reversal may be material.
For collaborative agreements, royalty revenue is recognized in the period the underlying sales occur, but we do not receive final royalty reports from our collaboration partners until after we complete our financial statements for a prior quarter. Therefore, we recognize revenue based on estimates of the royalty earned, which are based on preliminary reports provided by our collaboration partners.	The amount of royalty revenue recognized for the quarter is estimated using our knowledge of past royalty payments, market insight and an estimate made by our collaboration partners provided in a preliminary report.	A final royalty report and associated royalty payment is received approximately 60 days after quarter-end. If necessary, a true-up is recorded at that time if there is a difference from the initial estimated royalty revenue recorded. To date, the true-up entries have not been material.
For collaborative arrangements, when necessary, we perform an allocation of the upfront amount based on relative stand-alone selling prices (“SSP”) of licenses for individual targets. We determine license SSP using an income-based valuation approach utilizing risk-adjusted discounted cash flow projections.	The inputs used in the valuation model to determine SSP are based on estimates utilizing market data and information provided by our collaboration partners.	Differences in the allocation of the transaction price between delivered and undelivered performance obligations can impact the timing of revenue recognition but do not change the total revenue recognized under any agreement.

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Share-Based Payments
Methodology	Judgment and Uncertainties	Effect if Actual Results Differ From Assumptions
We maintain a Stock Incentive Plan, which provides for share-based payment awards, including stock options, restricted stock and performance awards. We determine the fair value of our stock option awards at the date of grant using a Black-Scholes model. We determine the fair value of our restricted stock unit awards at the date of grant using the closing market value of our common stock on the date of grant. We determine the grant date fair value for the PSU awards using a Monte Carlo simulation pricing model.	Option-pricing models and generally accepted valuation techniques require management to make assumptions and to apply judgment to determine the fair value of our awards. These assumptions and judgments include estimating the future volatility of our stock price, expected dividend yield and future employee stock option exercise behaviors. Changes in these assumptions can materially affect the fair value estimate. Our performance awards require management to make assumptions regarding the likelihood of achieving long-term Company goals.	We do not currently believe there is a reasonable likelihood that there will be a material change in estimates or assumptions we used to determine stock-based compensation expense. However, if actual results are not consistent with our estimates or assumptions, we may be exposed to changes in share-based compensation expense that could be material. If actual results are not consistent with the assumptions used, the share-based compensation expense reported in our financial statements may not be representative of the actual economic cost of the share-based compensation. A 10% change in our share-based compensation expense for the year ended December 31, 2023 would have affected pre-tax earnings by approximately $3.7 million in 2023.
Goodwill and Intangibles
Methodology	Judgment and Uncertainties	Effect if Actual Results Differ From Assumptions
We estimate the fair value of acquired intangible assets that have finite useful lives whenever an event or change in circumstances indicates that the carrying value of the asset may not be recoverable. We test for potential impairment of goodwill and other intangible assets that have indefinite useful lives annually in the second fiscal quarter or whenever indicators of impairment arise.	In the year of acquisition, significant estimates and assumptions are used to estimate the fair value of the intangible assets. Subsequent to the initial recognition, we monitor these assets for impairment indicators.	A change in any of the estimates or assumptions used may result an impairment charge in our consolidated statement of income.

Recent Accounting Pronouncements

Refer to Note 2, Summary of Significant Accounting Policies, of our consolidated financial statements for a discussion of recent accounting pronouncements and their effect, if any, on us.

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Item 7A.Quantitative and Qualitative Disclosures About Market Risk

As of December 31, 2023, our cash equivalents and marketable securities consisted of investments in money market funds, asset-backed securities, U.S. Treasury securities, corporate debt securities, agency bonds and commercial paper. These investments were made in accordance with our investment policy which specifies the categories, allocations, and ratings of securities we may consider for investment. The primary objective of our investment activities is to preserve principal while at the same time maximizing the income we receive without significantly increasing risk. Some of the financial instruments that we invest in could be subject to market risk. This means that a change in prevailing interest rates may cause the value of the instruments to fluctuate. For example, if we purchase a security that was issued with a fixed interest rate and the prevailing interest rate later rises, the value of that security may decline. Based on our current investment portfolio as of December 31, 2023, we do not believe that our results of operations would be materially impacted by an immediate change of 10% in interest rates.

We hedge a portion of foreign currency exchange risk associated with forecasted royalties revenue denominated in Swiss francs to reduce the risk of our earnings and cash flows being adversely affected by fluctuations in exchange rates. These transactions are designated and qualify as cash flow hedges. The cash flow hedges are carried at fair value with mark-to-market gains and losses recorded within AOCI in our consolidated balance sheets and reclassified to royalty revenue in our consolidated statements of income in the same period as the recognition of the underlying hedged transaction. We do not issue derivatives, derivative commodity instruments or other financial instruments for speculative trading purposes.

Further, we do not believe our cash, cash equivalents and marketable securities have significant risk of default or illiquidity. We made this determination based on discussions with our investment advisors and a review of our holdings. While we believe our cash, cash equivalents and marketable securities 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. All of our cash equivalents and marketable securities are recorded at fair market value.

Item 8.Financial Statements and Supplementary Data

Our financial statements are annexed to this report beginning on page F-1.

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

We maintain disclosure controls and procedures that are designed to ensure that information required to be disclosed in our Exchange Act reports is recorded, processed, summarized and reported within the timelines specified in the Securities and Exchange Commission’s rules and forms, and that such information is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decision regarding required disclosure. In designing and evaluating the disclosure controls and procedures, management recognized that any controls and procedures, no matter how well designed and operated, can only provide reasonable assurance of achieving the desired control objectives, and in reaching a reasonable level of assurance, management necessarily was required to apply its judgment in evaluating the cost-benefit relationship of possible controls and procedures.

Under the supervision and with the participation of our management, including our principal executive officer and principal financial officer, we conducted an evaluation of our disclosure controls and procedures, as such term is defined under Rule 13a-15(e) promulgated under the Securities Exchange Act of 1934, as amended. Based on this evaluation, our principal executive officer and our principal financial officer concluded that our disclosure controls and procedures were effective as of the end of the period covered by this Annual Report on Form 10-K.

Changes in Internal Control Over Financial Reporting

There have been no significant changes in our internal control over financial reporting that occurred during the period ended December 31, 2023 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Management’s Report on Internal Control Over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting. Internal control over financial reporting is defined in Rule 13a-15(f) and Rule 15d-15(f) promulgated under the Exchange Act of 1934, as amended, as a process designed by, or under the supervision of, our principal executive and principal financial officers and effected by our Board of Directors, management and other personnel, 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 and includes those policies and procedures that:

•Pertain to the maintenance of records that in reasonable detail accurately and fairly reflect the transactions and dispositions of our assets;

•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 are being made only in accordance with authorizations of our management and directors; and

•Provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of our assets that could have a material effect on our financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. 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.

Our management assessed the effectiveness of our internal control over financial reporting as of December 31, 2023. In making this assessment, our management used the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission (“COSO”) in Internal Control-Integrated Framework (2013 framework) (the “COSO criteria”). Based on our assessment, management concluded that, as of December 31, 2023, our internal control over financial reporting is effective based on the COSO criteria. The independent registered public accounting firm that audited the consolidated financial statements that are included in this Annual Report on Form 10-K has issued an audit report on the effectiveness of our internal control over financial reporting as of December 31, 2023. The report appears below.

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Report of Independent Registered Public Accounting Firm

To the Stockholders and Board of Directors of

Halozyme Therapeutics, Inc.

Opinion on Internal Control Over Financial Reporting

We have audited Halozyme Therapeutics, Inc.’s internal control over financial reporting as of December 31, 2023, 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, Halozyme Therapeutics, Inc. (the Company) maintained, in all material respects, effective internal control over financial reporting as of December 31, 2023, 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, 2023 and 2022, the related consolidated statements of income, comprehensive income, cash flows and stockholders’ equity for each of the three years in the period ended December 31, 2023, and the related notes the financial statement schedule listed in the Index at Item 15(a) and our report dated February 20, 2024 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 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

San Diego, California

February 20, 2024

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Item 9B.Other Information

During the three months ended December 31, 2023, no director or officer adopted or terminated any Rule 10b5-1 trading arrangement or non-rule 10b5-1 trading arrangement (as such terms are defined pursuant to Item 408(a) of Regulation S-K).

Item 9C.     Disclosure Regarding Foreign Jurisdictions that Prevent Inspections.

None.

PART III

Item 10.Directors, Executive Officers and Corporate Governance

The information required by this item regarding directors is incorporated by reference to our definitive Proxy Statement (the “Proxy Statement”) to be filed with the Securities and Exchange Commission in connection with our 2024 Annual Meeting of Stockholders no later than 120 days after December 31, 2023 under the heading “Election of Directors.” The information required by this item regarding our code of ethics is incorporated by reference to the information under the caption “Code of Conduct and Ethics and Corporate Governance Guidelines” to be contained in the Proxy Statement. The information required by this item regarding our Audit Committee is incorporated by reference to the information under the caption “Board Meetings and Committees—Audit Committee” to be contained in the Proxy Statement. The information required by this item regarding material changes, if any, to the process by which stockholders may recommend nominees to our Board of Directors is incorporated by reference to the information under the caption “Board Meetings and Committees—Nominating and Governance Committee” to be contained in the Proxy Statement.

Executive Officers

Helen I. Torley, M.B. Ch. B., M.R.C.P. (61), President, Chief Executive Officer and Director. Dr. Torley joined Halozyme in January 2014 as President and Chief Executive Officer and as a member of Halozyme’s Board of Directors. Throughout her career, Dr. Torley has led several successful product launches, including Kyprolis®, Prolia®, Sensipar®, and Miacalcin®. Prior to joining Halozyme, Dr. Torley served as Executive Vice President and Chief Commercial Officer for Onyx Pharmaceuticals (“Onyx”) from August 2011 to December 2013 overseeing the collaboration with Bayer on Nexavar® and Stivarga® and the U.S. launch of Kyprolis®. She was responsible for the development of Onyx's commercial capabilities in ex-U.S. markets and in particular, in Europe. Prior to Onyx, Dr. Torley spent 10 years in management positions at Amgen Inc., most recently serving as Vice President and General Manager of the U.S. Nephrology Business Unit from 2003 to 2009 and the U.S. Bone Health Business Unit from 2009 to 2011. From 1997 to 2002, she held various senior management positions at Bristol-Myers Squibb, including Regional Vice President of Cardiovascular and Metabolic Sales and Head of Cardiovascular Global Marketing. She began her career at Sandoz/Novartis, where she ultimately served as Vice President of Medical Affairs, developing and conducting post-marketing clinical studies across all therapeutic areas, including oncology. Within the past five years, Dr. Torley served on the Board of Directors of Quest Diagnostics Incorporated, a diagnostic information services company. Before joining the industry, Dr. Torley was in medical practice as a senior registrar in rheumatology at the Royal Infirmary in Glasgow, Scotland. Dr. Torley received her Bachelor of Medicine and Bachelor of Surgery degrees (M.B. Ch.B.) from the University of Glasgow and is a Member of the Royal College of Physicians (M.R.C.P).

Nicole LaBrosse (41), Senior Vice President, Chief Financial Officer. Ms. LaBrosse has served as the Senior Vice President, Chief Financial Officer since February 2022 and has over 20 years of public accounting and corporate finance experience. She previously served as the Company’s Vice President, Finance and Accounting from January 2020 to February 2022 and as the Company’s Executive Director, Controller from July 2017 to December 2019. From June 2015 to June 2017, she was the Company’s Senior Director, Financial Reporting. Prior to joining the Company, Ms. LaBrosse was an auditor with PricewaterhouseCoopers, LLP from 2004 to 2015. She received a certified public accounting license after receiving a B.S. degree in corporate finance and accounting and her M.S. degree in accounting from Bentley College.

Mark Snyder (57), Senior Vice President, General Counsel, Chief Compliance Officer and Secretary. Mr. Snyder joined Halozyme in January 2022 as Senior Vice President, General Counsel, Chief Compliance Officer and Secretary. Mr. Snyder has

63

over 30 years of experience in legal and business management roles. Prior to joining Halozyme, from January 2008 to December 2021, Mr. Snyder served in various senior positions in the legal department at Qualcomm Incorporated, a wireless communications company, including his most recent positions as Senior Vice President & Deputy General Counsel, Litigation, from April 2016 to December 2021 and Vice President, Patent Counsel, from October 2010 to April 2016. Before Qualcomm, Mr. Snyder served as Lead Intellectual Property Counsel at Kyocera Wireless Corp., a wireless communications company, and has held legal and business management roles in two smaller companies. Mr. Snyder began his legal career as a patent attorney at the law firm of Sheridan Ross & McIntosh. Mr. Snyder received his B.S. degree in chemical engineering at the University of Rochester and his M.B.A. degree from Boston College Carroll School of Business. He received his J.D. from Boston College Law School.

Michael J. LaBarre (60), Senior Vice President, Chief Technical Officer. Dr. LaBarre joined Halozyme in June 2008 as Vice President, Product Development and has served in various officer positions most recently as Senior Vice President, Chief Technical Officer since January 2020. Prior to joining Halozyme, Dr. LaBarre served as Vice President, Product Development at Paramount BioSciences, a pharmaceutical company, from April 2006 to June 2008. Prior to that he served as Director, Analytical and Protein Biochemistry, Discovery Research at Biogen Idec, a pharmaceutical company, from December 2003 to April 2006. He also served in various research and development roles at IDEC Pharmaceuticals Corporation, a pharmaceutical company, from November 1995 to December 2003 most recently as Director, Analytical and Formulation Sciences, R&D. Prior to joining IDEC, Dr. LaBarre held research and development positions at various pharmaceutical companies from July 1992 to November 1995. Dr. LaBarre received his Ph.D. in Chemistry from the University of Arizona and his B.S. in Chemistry from Southampton College of Long Island University.

Item 11.Executive Compensation

The information required by this item is incorporated by reference to the information under the captions “Executive Compensation and Related Information” and “Compensation Committee Interlocks and Insider Participation” to be contained in the Proxy Statement.

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

Other than as set forth below, the information required by this item is incorporated by reference to the information under the caption “Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters” to be contained in the Proxy Statement.

Equity Compensation Plan Information

The following table summarizes our compensation plans under which our equity securities are authorized for issuance as of December 31, 2023:

Plan Category	Number of Shares  to be Issued upon Exercise of Outstanding Options, Restricted Stock Units and Performance Stock Units (a)	Weighted Average Exercise Price of Outstanding Options(2) (b)		Number of Shares Remaining Available for Future Issuance under Equity Compensation Plans (Excluding Shares Reflected in Column (a)) (c)
Equity compensation plans approved by stockholders (1)	7,804,728	$	30.50	14,681,908
Equity compensation plans not approved by stockholders	—	—		—
	7,804,728	$	30.50	14,681,908

(1)Represents stock options, restricted stock units, and performance stock units under the Amended and Restated 2021 Stock Plan. This includes 2,604,222 shares available for future purchase under our ESPP plan.

(2)This amount does not include performance stock units as there is no exercise price for such units.

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

The information required by this item is incorporated by reference to the information under the captions “Certain Relationships and Related Transactions” and “Corporate Governance - Director Independence” to be contained in the Proxy Statement.

Item 14.Principal Accounting Fees and Services

The information required by this item is incorporated by reference to the information under the caption “Principal Accounting Fees and Services” to be contained in the Proxy Statement.

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PART IV

Item 15.Exhibits and Financial Statement Schedules

(a)Documents filed as part of this report.

1.   Financial Statements 

	Page
Report of Independent Registered Public Accounting Firm ID 42	F-1
Consolidated Balance Sheets as of December 31, 2023 and 2022	F-3
Consolidated Statements of Income for Each of the Years Ended December 31, 2023, 2022 and 2021	F-4
Consolidated Statements of Comprehensive Income for Each of the Years Ended December 31, 2023, 2022 and 2021	F-5
Consolidated Statements of Cash Flows for Each of the Years Ended December 31, 2023, 2022 and 2021	F-6
Consolidated Statements of Stockholders’ Equity for Each of the Years Ended December 31, 2023, 2022 and 2021	F-7
Notes to the Consolidated Financial Statements	F-8

2.   List of all Financial Statement schedules.

The following financial statement schedule of Halozyme Therapeutics, Inc. is filed as part of this Annual Report on Form 10-K and should be read in conjunction with the consolidated financial statements of Halozyme Therapeutics, Inc.

	Page
Schedule II: Valuation and Qualifying Accounts	F-44

All other schedules are omitted because they are not applicable or the required information is shown in the Financial Statements or notes thereto.

3.   List of Exhibits required by Item 601 of Regulation S-K. See part (b) below.

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(b)Exhibits.

			Incorporated by Reference
Exhibit		Filed
Number	Exhibit Title	Herewith	Form	Date Filed
3.1	Amended and Restated Certification of Incorporation of Halozyme Therapeutics, Inc.		8-K	5/3/2019
3.2	The Company's Bylaws, as amended		8-K	12/10/2021
4.1	Indenture, dated March 1, 2021, between Halozyme Therapeutics, Inc. and The Bank of New York Mellon Trust Company, N.A., as trustee, and the Registrant		8-K	3/1/2021
4.2	Form of Note, dated March 1, 2021, between Halozyme Therapeutics, Inc. and The Bank of New York Mellon Trust Company, N.A., as trustee, and the Registrant		8-K	3/1/2021
4.3	Indenture, dated August 18, 2022, between Halozyme Therapeutics, Inc. and The Bank of New York Mellon Trust Company, N.A., as trustee and registrant.		8-K	8/18/2022
4.4	Form of Note, dated August 18, 2022, between Halozyme Therapeutics, Inc. and The Bank of New York Mellon Trust Company, N.A., as trustee, and the Registrant (included within Exhibit 4.5)		8-K	8/18/2022
4.5	Description of Securities		10-K	2/22/2022
10.1	Form of Capped Call Confirmation		8-K	8/18/2022
10.2	Credit Agreement, dated as of May 24, 2022, by and among Halozyme Therapeutics, Inc., the Guarantors, Bank of America N.A. and each of those additional Lenders that are a party to such agreement.		8-K	5/24/2022
10.3	Security Agreement, dated as of May 24, 2022, by and among Halozyme Therapeutics, Inc., the Guarantors and Bank of America N.A		8-K	5/24/2022
10.4	Amendment No. 1 to the Credit Agreement		8-K	8/19/2022
10.5	Amendment No. 2 to the Credit Agreement		10-Q	5/9/2023
10.6	Agreement for Assignment and Assumption of Lease, Del Mar Corporate Centre I Office Lease and First Amendment to Office Lease		10-Q	5/10/2022
10.7	Lease Agreement, dated July 1, 2019, by and between Antares Pharma, Inc. and Whitewater Properties I, LLC.		8-K	7/5/2019
10.8#	Halozyme Therapeutics, Inc. 2021 Employee Stock Purchase Plan		10-Q	11/8/2022
10.9#	Halozyme Therapeutics, Inc. 2021 Stock Plan		8-K	5/5/2021
10.10#	Form of Stock Option Agreement (2021 Plan updated May 2023)		10-Q	8/8/2023
10.11#	Form of Restricted Stock Units Agreement for Officers (2021 Plan updated May 2023)		10-Q	8/8/2023
10.12#	Form of Restricted Stock Units Agreement (2021 Plan Sell-to-Cover updated May 2023)		10-Q	8/8/2023
10.13#	Letter Agreement Amending Exercise Period for Employee Option		10-Q	8/8/2023
10.14#	Form of Performance Stock Units (2021 Stock Plan)		8-K	5/5/2021

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			Incorporated by Reference
Exhibit		Filed
Number	Exhibit Title	Herewith	Form	Date Filed
10.15#	Form of Directors Restricted Stock Units Agreement (2021 Stock Plan)		8-K	5/5/2021
10.16#	Form of Director Stock Option Agreement (2021 Plan)		10-Q	8/8/2023
10.17#	Halozyme Therapeutics, Inc. 2011 Stock Plan (as amended through May 2, 2018)		8-K	4/6/2018
10.18#	Form of Stock Option Agreement (2011 Stock Plan)		8-K	5/6/2011
10.19#	Form of Stock Option Agreement for Executive Officers (2011 Stock Plan)		8-K	5/6/2011
10.20#	Form of Restricted Stock Units Agreement for Officers (2011 Stock Plan)		10-Q	8/10/2015
10.21#	Form of Restricted Stock Award Agreement for Officers (2011 Stock Plan)		10-Q	8/10/2015
10.22#	Form of Stock Option Agreement (2011 Stock Plan -grants made on or after 11/4/2015)		10-Q	11/9/2015
10.23#	Form of Restricted Stock Units Agreement (2011 Stock Plan - grants made on or after 11/4/2015)		10-Q	11/9/2015
10.24#	Form of Restricted Stock Units Agreement (2011 Plan - grants made on or after 2/22/2017)		10-K	2/28/2017
10.25#	Form of Indemnity Agreement for Directors and Executive Officers		8-K	12/20/2007
10.26#	Form of PSU Agreement (2011 Stock Plan)		10-Q	8/10/2020
10.27#	Form of PSU Agreement (2011 Stock Plan)		10-K	2/23/2021
10.28#	Severance Policy	X
10.29#	Form of Amended and Restated Change In Control Agreement with Officer		10-Q	11/9/2015
10.30#	Halozyme Therapeutics, Inc. Non Qualified Deferred Compensation Plan Adoption Agreement		10-K	2/22/2022

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			Incorporated by Reference
Exhibit		Filed
Number	Exhibit Title	Herewith	Form	Date Filed
10.31#	Halozyme Therapeutics, Inc Directors Deferred Equity Compensation Plan		10-K	2/22/2022
21.1	Subsidiaries of Registrant	X
23.1	Consent of Independent Registered Public Accounting Firm	X
31.1	Certification of Chief Executive Officer pursuant to Rule 13a-14(a) and 15d-14(a) of the Securities Exchange Act of 1934, as amended	X
31.2	Certification of Chief Financial Officer pursuant to Rule 13a-14(a) and 15d-14(a) of the Securities Exchange Act of 1934, as amended	X
32	Certification of Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002	X
97	Halozyme Therapeutics, Inc. Incentive Compensation Recoupment Policy	X
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.	X
101.SCH	XBRL Taxonomy Extension Schema	X
101.CAL	XBRL Taxonomy Extension Calculation Linkbase	X
101.DEF	XBRL Taxonomy Extension Definition Linkbase	X
101.LAB	XBRL Taxonomy Extension Label Linkbase	X
101.PRE	XBRL Taxonomy Presentation Linkbase	X
104	Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101)	X

_______________

# Indicates management contract or compensatory plan or arrangement.

(c)Financial Statement Schedules.

See Item 15(a) 2 above.

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Item 16.Form 10-K Summary

None.

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SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) 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.

 

		Halozyme Therapeutics, Inc., a Delaware corporation
Date:	February 20, 2024	By:	/s/  Helen I. Torley, M.B. Ch.B., M.R.C.P.
			Helen I. Torley, M.B. Ch.B., M.R.C.P.
			President and Chief Executive Officer
			(Principal Executive Officer)

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POWER OF ATTORNEY

Know all persons by these presents, that each person whose signature appears below constitutes and appoints Helen I. Torley and Nicole LaBrosse, and each of them, as his/her true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for him/her and in his/her name, place, and stead, in any and all capacities, to sign any and all amendments to this Annual Report, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done in connection therewith, as fully to all intents and purposes as he/she might or could do in person, hereby ratifying and confirming that all said attorneys-in-fact and agents, or any of them or their or his/her substitute or substituted, may lawfully do or cause to be done by virtue thereof.

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

Signature	Title	Date
/s/  Helen I. Torley, M.B. Ch.B., M.R.C.P.	President and Chief Executive Officer, Director	February 20, 2024
Helen I. Torley, M.B. Ch.B., M.R.C.P.	(Principal Executive Officer)
/s/  Nicole LaBrosse	Senior Vice President and Chief Financial Officer	February 20, 2024
Nicole LaBrosse	(Principal Financial and Accounting Officer)
/s/  Jeffrey W. Henderson	Chair of the Board of Directors	February 20, 2024
Jeffrey W. Henderson
/s/ Jean-Pierre Bizzari	Director	February 20, 2024
Jean-Pierre Bizzari
/s/  Bernadette Connaughton	Director	February 20, 2024
Bernadette Connaughton
/s/  Barbara Duncan	Director	February 20, 2024
Barbara Duncan
/s/  Connie L. Matsui	Director	February 20, 2024
Connie L. Matsui
/s/  Moni Miyashita	Director	February 20, 2024
Moni Miyashita
/s/  Matthew L. Posard	Director	February 20, 2024
Matthew L. Posard

72

Report of Independent Registered Public Accounting Firm

To the Stockholders and Board of Directors of

Halozyme Therapeutics, Inc.

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Halozyme Therapeutics, Inc. (the Company) as of December 31, 2023 and 2022, the related consolidated statements of income, comprehensive income, cash flows and stockholders’ equity for each of the three years in the period ended December 31, 2023, and the related notes and financial statement schedule listed in the Index at Item 15(a) (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2023 and 2022, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2023, 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, 2023, 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 20, 2024 expressed an unqualified opinion thereon.

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 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 financial statements and (2) involved our especially challenging, subjective or complex judgments. The communication of the critical audit matters 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.

F-1

Determination of Overall Transaction Price for Collaboration Agreements
Description of the Matter	At December 31, 2023, the Company has eleven collaboration agreements. As discussed in Notes 2 and 5 of the financial statements, amounts are included in the transaction price when management determines that it is probable that the amount will not result in a significant reversal of revenue in the future. During 2023, the Company recognized $69.0 million of variable consideration in the transaction price under their collaboration arrangements. Auditing management’s conclusions related to determining the probability of achievement of milestones is complex and highly judgmental given the progression of developing and commercializing the combined targets is completed by the collaboration partners.
How We Addressed the Matter in Our Audit	We obtained an understanding and evaluated the design and tested the operating effectiveness of controls over the Company’s process to routinely evaluate the probability of achievement of milestones and any related constraint for each collaboration, in addition to the controls over the completeness and accuracy of determining the population of agreements and potential milestone payments. To test the milestone amounts included, or excluded, from the transaction price, we performed audit procedures that included, among others, inspecting evidence to support management’s assessment of the probability of achievement. For each milestone, we examined evidence including correspondence with the collaboration partner and evaluated management’s conclusions on the probabilities of achievement. We reviewed supporting documentation to corroborate that milestones were included in the transaction price when determined to be probable of achievement. We reviewed the collaboration agreements and related amendments to validate the completeness of the list of targets and potential milestone payments that management considered in their analysis. We performed a lookback analysis to validate the Company’s accuracy of determining the probability of achieving these milestones.

                        /s/    Ernst & Young LLP

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

San Diego, California

February 20, 2024

F-2

HALOZYME THERAPEUTICS, INC.

CONSOLIDATED BALANCE SHEETS

(In thousands, except per share amounts)

	December 31, 2023		December 31, 2022
ASSETS
Current assets
Cash and cash equivalents	$	118,370	$	234,195
Marketable securities, available-for-sale	217,630		128,599
Accounts receivable, net and other contract assets	234,210		231,072
Inventories, net	127,601		100,123
Prepaid expenses and other current assets	48,613		45,024
Total current assets	746,424		739,013
Property and equipment, net	74,944		75,570
Prepaid expenses and other assets	17,816		26,301
Goodwill	416,821		409,049
Intangible assets, net	472,879		546,652
Deferred tax assets, net	4,386		44,426
Restricted cash	—		500
Total assets	$	1,733,270	$	1,841,511
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities
Accounts payable	$	11,816	$	17,693
Accrued expenses	100,678		99,762
Current portion of long-term debt, net	—		13,334
Total current liabilities	112,494		130,789
Long-term debt, net	1,499,248		1,492,766
Other long-term liabilities	37,720		32,686
Contingent liability	—		15,472
Total liabilities	1,649,462		1,671,713
Commitments and contingencies (Note 12)
Stockholders’ equity
Preferred stock - $0.001 par value; 20,000 shares authorized; no shares issued and outstanding	—		—
Common stock - $0.001 par value; 300,000 shares authorized; 126,770 and 135,154 shares issued and outstanding as of December 31, 2023 and 2022, respectively	127		135
Additional paid-in capital	2,409		27,368
Accumulated other comprehensive loss	(9,278)		(922)
Retained earnings	90,550		143,217
Total stockholders’ equity	83,808		169,798
Total liabilities and stockholders’ equity	$	1,733,270	$	1,841,511

See accompanying notes to consolidated financial statements.

F-3

HALOZYME THERAPEUTICS, INC.

CONSOLIDATED STATEMENTS OF INCOME

(In thousands, except per share amounts)

	Year Ended December 31,
	2023		2022		2021
Revenues
Royalties	$	447,865	$	360,475	$	203,900
Product sales, net	300,854		191,030		104,224
Revenues under collaborative agreements	80,534		108,611		135,186
Total revenues	829,253		660,116		443,310
Operating expenses
Cost of sales	192,361		139,304		81,413
Amortization of intangibles	73,773		43,148		—
Research and development	76,363		66,607		35,672
Selling, general and administrative	149,182		143,526		50,323
Total operating expenses	491,679		392,585		167,408
Operating income	337,574		267,531		275,902
Other income (expense)
Investment and other income, net	16,317		1,046		1,102
Inducement expense related to convertible notes	—		(2,712)		(20,960)
Contingent liability fair value measurement gain	13,200		—		—
Interest expense	(18,762)		(16,947)		(7,526)
Net income before income taxes	348,329		248,918		248,518
Income tax expense (benefit)	66,735		46,789		(154,192)
Net income	$	281,594	$	202,129	$	402,710
Earnings per share
Basic	$	2.13	$	1.48	$	2.86
Diluted	$	2.10	$	1.44	$	2.74
Weighted average common shares outstanding
Basic	131,927		136,844		140,646
Diluted