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Nektar Therapeutics

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FY2024 Annual Report · Nektar Therapeutics
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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, DC 20549
 
Form 10-K
 
 
☒
ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934.
 
For the fiscal year ended December 31, 2024
or
 
☐
TRANSITION REPORTS PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934.
 
For the transition period from        to
Commission File Number: 0-24006
 
NEKTAR THERAPEUTICS
(Exact name of registrant as specified in its charter)
 
 
Delaware
94-3134940
(State or other jurisdiction of
incorporation or organization)
(IRS Employer
Identification No.)
 
455 Mission Bay Boulevard South
San Francisco, California 94158
(Address of principal executive offices and zip code)
415-482-5300
(Registrant’s telephone number, including area code)
 
Securities registered pursuant to Section 12(b) of the Act:
 
Title of Each Class
Trading Symbol
Name of Each Exchange on Which Registered 
Common Stock, $0.0001 par value
NKTR
NASDAQ Capital Market
 
Securities registered pursuant to Section 12(g) of the Act:
None
 
Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☐ No ☒
Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes ☐ No ☒
Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for 
such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐
Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) 
during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company or an emerging growth company. See the 
definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act. :
 
Large Accelerated Filer
☐
Accelerated filer
☐
Non-accelerated filer
☒
Smaller reporting company
☒
Emerging growth company
☐
 
 
 
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards 
provided pursuant to Section 13(a) of the Exchange Act. ☐
Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 
404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☐
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 Exchange Act Rule 12b-2). Yes ☐ No ☒
The approximate aggregate market value of voting stock held by non-affiliates of the registrant, based upon the last sale price of the registrant’s common stock on the last business day of the 
registrant’s most recently completed second fiscal quarter, June 30, 2024, as reported on The NASDAQ Capital Market, was approximately $226 million.
As of March 6, 2025, the number of outstanding shares of the registrant’s common stock was 186,103,588.
DOCUMENTS INCORPORATED BY REFERENCE
 
 

 
2
Table of Contents
NEKTAR THERAPEUTICS
2024 ANNUAL REPORT ON FORM 10-K
TABLE OF CONTENTS
 
 
 
Page
 
Summary of Risks
3
 
 
 
 
PART I
 
 
 
 
Item 1.
Business
5
Item 1A.
Risk Factors
19
Item 1B.
Unresolved Staff Comments
40
Item 1C.
Cybersecurity
40
Item 2.
Properties
41
Item 3.
Legal Proceedings
41
Item 4.
Mine Safety Disclosures
41
 
 
 
 
PART II
 
 
 
 
Item 5.
Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities
42
Item 6.
Reserved
43
Item 7.
Management’s Discussion and Analysis of Financial Condition and Results of Operations
44
Item 7A.
Quantitative and Qualitative Disclosures About Market Risk
54
Item 8.
Financial Statements and Supplementary Data
56
Item 9.
Changes in and Disagreements with Accountants on Accounting and Financial Disclosure
92
Item 9A.
Controls and Procedures
92
Item 9B.
Other Information
92
Item 9C.
Disclosure Regarding Foreign Jurisdictions that Prevent Inspections
93
 
 
 
 
PART III
 
 
 
 
Item 10.
Directors, Executive Officers and Corporate Governance
94
Item 11.
Executive Compensation
97
Item 12.
Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters
123
Item 13.
Certain Relationships and Related Transactions and Director Independence
124
Item 14.
Principal Accountant Fees and Services
125
 
 
 
 
PART IV
 
 
 
 
Item 15.
Exhibits and Financial Statement Schedules
127
Item 16.
Form 10-K Summary
127
Signatures
132
 

 
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Table of Contents
Forward-Looking Statements
This report includes “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E 
of the Securities Exchange Act of 1934, as amended. All statements other than statements of historical fact are “forward-looking statements” for purposes 
of this annual report on Form 10-K, including any projections of market size, earnings, revenue, milestone payments, royalties, sales or other financial 
items, any statements of the plans and objectives of management for future operations (including, but not limited to, preclinical development, clinical trials 
and manufacturing), any statements related to our financial condition and future working capital needs, any statements related to our prior strategic 
reorganization and cost restructuring plans, any statements regarding potential future financing alternatives, any statements concerning proposed drug 
candidates and our future research and development plans, any statements regarding the timing for the start or end of clinical trials or submission of 
regulatory approval filings, any statements regarding future economic conditions or performance, any statements regarding the initiation, formation, or 
success of our collaboration arrangements, any statements regarding future payments that may come due to us, any statements regarding our plans and 
objectives to initiate or continue clinical trials, any statements related to potential, anticipated, or ongoing litigation and any statements of assumptions 
underlying any of the foregoing. In some cases, forward-looking statements can be identified by the use of terminology such as “believe,” “may,” “will,” 
“expects,” “plans,” “anticipates,” “estimates,” “potential” or “continue,” or the negative thereof or other comparable terminology. Although we believe that 
the expectations reflected in the forward-looking statements contained herein are reasonable, such expectations or any of the forward-looking statements 
may prove to be incorrect and actual results could differ materially from those projected or assumed in the forward-looking statements. Our future financial 
condition and results of operations, as well as any forward-looking statements, are subject to inherent risks and uncertainties, including, but not limited to, 
the risk factors set forth in Part I, Item 1A “Risk Factors” below and for the reasons described elsewhere in this annual report on Form 10-K. All forward-
looking statements and reasons why results may differ included in this report are made as of the date hereof and we do not intend to update any forward-
looking statements except as required by law or applicable regulations. Except where the context otherwise requires, in this annual report on Form 10-K, 
the “Company,” “Nektar,” “we,” “us,” and “our” refer to Nektar Therapeutics, a Delaware corporation, and, where appropriate, its subsidiaries.
Trademarks
The Nektar brand and product names, including but not limited to Nektar®, contained in this document are trademarks and registered trademarks 
of Nektar Therapeutics in the United States (U.S.) and certain other countries. This document also contains references to trademarks and service marks of 
other companies that are the property of their respective owners.
Summary of Risks
We are providing the following cautionary discussion of risk factors, uncertainties and assumptions that we believe are relevant to our business. 
These are factors that, individually or in the aggregate, we think could cause our actual results to differ materially from expected and historical results and 
our forward-looking statements. We note these factors for investors as permitted by Section 21E of the Exchange Act and Section 27A of the Securities 
Act. Investors in Nektar Therapeutics should carefully consider the risks described below before making an investment decision. You should understand 
that it is not possible to predict or identify all such factors. Consequently, you should not consider this section to be a complete discussion of all potential 
risks or uncertainties that may substantially impact our business. Moreover, we operate in a competitive and rapidly changing environment. New factors 
emerge from time to time and it is not possible to predict the impact of all of these factors on our business, financial condition or results of operations.
Risks to our business are more fully described below in Item IA in this Form 10-K, which risks include, among others:
•
Risks Related to our Research and Development Efforts:
o
clinical drug development is a lengthy and uncertain process and we may not be able to generate and develop successful drug 
candidates for commercial use;
o
we are highly dependent on the success of rezpegaldesleukin (previously referred to as NKTR-358) and our business will be 
significantly harmed if rezpegaldesleukin does not continue to advance in clinical studies;
o
the outcomes from competitive immunotherapy clinical trials, and the discovery and development of new potential 
immunotherapies could have a material and adverse impact on the value of our pipeline;
o
significant competition for our products and drug candidates could make our drug products or drug candidates obsolete or 
uncompetitive;
o
preliminary and interim data from our clinical studies are subject to audit and verification procedures that could result in material 
changes in the final data and may change as more patient data become available;

 
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o
clinical trials for any of our drug candidates could be delayed for a variety of reasons, including delays associated with activating 
clinical sites and lower than anticipated patient enrollment rates, which are often outside of our control; and
o
we depend on third parties to conduct laboratory experiments, preclinical studies and clinical trials for our drug candidates and 
any failure of those parties to fulfill their obligations according to our instructions and protocol standards could harm our 
research and development plans and adversely affect our business.
•
Risks Related to our Financial Condition and Capital Requirements:
o
there is no guarantee that our prior strategic reorganization plan and cost restructuring plans will achieve their intended benefits 
and we may need to undertake additional cost-saving measures;
o
we have substantial future capital requirements and there is a risk we may not have access to sufficient capital to meet our 
current business plan;
o
a significant source of our revenue and capital for research and development has been derived from our collaboration 
agreements, and if we are unable to establish and maintain new collaboration partnerships with attractive commercial terms, 
including significant development milestones and research and development cost-sharing, our business, results of operations and 
financial condition could suffer; and
o
we expect to continue to incur substantial net losses from operations and may not achieve or sustain profitability in the future.
•
Risks Related to Supply and Manufacturing:
o
if our contract manufacturers are not able to manufacture drugs or drug substances in sufficient quantities that meet applicable 
quality standards, our business, financial condition and results of operations could be harmed; and
o
we purchase some of the starting material for drugs and drug candidates from a single source or a limited number of suppliers, 
and the partial or complete loss of one of these suppliers could cause delays, loss of revenue and contract liability.
•
Risks Related to Intellectual Property, Litigation and Regulatory Concerns:
o
we or our partners may not obtain regulatory approval for our drug candidates on a timely basis, or at all;
o
patents may not issue from our patent applications for our drug candidates, patents that have issued may not be enforceable, or 
additional intellectual property licenses from third parties may be required, which may not be available to us on commercially 
reasonable terms; and
o
from time to time, we are involved in legal proceedings and may incur substantial litigation costs and liabilities that could 
adversely affect our business, financial condition and results of operations.
•
Risks Related to our Collaboration Partners:
o
we are highly dependent on advancing rezpegaldesleukin in clinical trials, and while we believe we currently have the materials 
that are necessary for us to continue clinical development of rezpegaldesleukin, our ability to perform important development 
and regulatory activities will be significantly harmed if Eli Lilly and Company fails to continue to cooperate with us in the 
transfer of all materials associated with the rezpegaldesleukin program; and
o
we may rely on academic and private non-academic institutions to conduct investigator-sponsored clinical studies or trials of our 
drug candidates and any failure by the investigator-sponsor to meet its obligations with respect to the clinical development of our 
drug candidates may delay or impair our ability to enter into collaboration agreements, obtain regulatory approval and 
commercialize for our drug candidates.
In addition to the above-mentioned risks, our business is subject to a number of additional risks faced by businesses generally.

 
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Table of Contents
PART I
Item 1. Business
Nektar Therapeutics (Nektar, we) is a clinical stage, research-based drug discovery biopharmaceutical company focused on discovering and 
developing innovative medicines in the field of immunotherapy. Within this growing field, we direct our efforts toward creating new immunomodulatory 
agents that selectively induce, amplify, attenuate or prevent immune responses in order to achieve desired therapeutic outcomes. We apply our deep 
understanding of immunology to identify and create innovative drug candidates and use our drug development expertise to advance these molecules 
through preclinical and clinical development. Our pipeline of clinical-stage and preclinical-stage immunomodulatory agents targets the treatment of 
autoimmune diseases (e.g. rezpegaldesleukin and NKTR-0165, respectively) and cancer (e.g. NKTR-255). We continue to make significant investments in 
building and advancing our pipeline of drug candidates as we believe that this is the best strategy to build long-term shareholder value.
Our Drug Candidates and Pipeline
By modulating the immune system, our drug candidates target pathways that play critical roles in a wide range of serious diseases. In autoimmune 
diseases, our focus is on addressing imbalances in the immune system to restore the body’s self-tolerance mechanisms and to achieve immune homeostasis. 
In oncology, we are focused on activating the immune system’s natural tumor-fighting mechanisms.
Autoimmune diseases 
We recognize that many autoimmune diseases are caused by an imbalance in the body’s immune system. A failure of the body’s self-tolerance 
mechanisms enables the formation of pathogenic T cells that cause the immune system to mistakenly attack and damage healthy cells in a person’s body. 
Current systemic treatments for autoimmune diseases, including corticosteroids and anti-TNF agents, suppress the immune system broadly and come with 
severe side effects. Pharmaceutical agents designed to rebalance the immune system by increasing the function of regulatory T cells (Treg cells), powerful 
inhibitory immune cells, could be used to treat patients suffering from autoimmune disorders and inflammatory diseases.
Rezpegaldesleukin
Our drug candidate rezpegaldesleukin is a potential first-in-class resolution therapeutic that may address this underlying immune system 
imbalance in people with autoimmune disorders and inflammatory diseases. It is designed to target the interleukin-2 (IL-2) receptor complex in the body in 
order to stimulate proliferation of Treg cells. By activating these cells, rezpegaldesleukin may act to bring the immune system back into balance. 
Rezpegaldesleukin is being developed as a once or twice monthly self-administered injection for a number of autoimmune disorders and inflammatory 
diseases.
On October 13, 2023, we announced final efficacy data from a Phase 1b study of rezpegaldesleukin in adult patients with atopic dermatitis (Phase 
1b AD Study) at the European Academy of Dermatology and Venereolgy conference. The final efficacy data from the Phase 1b AD study showed that 
patients with moderate-to-severe atopic dermatitis that were treated with rezpegaldesluekin had dose-dependent improvements in the eczema area and 
severity index (EASI), validated investigated global assessment (vIGA), body surface area (BSA), and itch numeric rating scale (NRS) over twelve weeks 
of treatment compared to placebo, which were sustained post-treatment over an additional thirty-six weeks. Rezpegaldesleukin was well tolerated with no 
patients in the rezpegaldesleukin groups experiencing severe, serious, or fatal adverse events, and no anti-rezpegaldesleukin antibodies were detected. 
In late October 2023, we initiated a Phase 2b clinical study of rezpegaldesleukin in patients with moderate-to-severe atopic dermatitis, which 
remains on track for a topline data readout in the first half of 2025. On February 11, 2025, we announced that the U.S. Food and Drug Administration 
(FDA) had granted Fast Track designation for rezpegaldesleukin for the treatment of adult and pediatric patients 12 years of age and older with moderate-
to-severe atopic dermatitis whose disease is not adequately controlled with topical prescription therapies or when those therapies are not advisable.
In March 2024, we initiated a Phase 2b clinical study of rezpegaldesleukin in patients with severe-to-very severe alopecia areata, which remains 
on track for a topline data readout in the second half of 2025. 
We plan to explore other autoimmune indications for the development of rezpegaldesleukin.
On February 24, 2025, we announced that we had entered into a clinical trial agreement with TrialNet, an international clinical trial network 
focused on diabetes research, to evaluate rezpegaldesleukin in patients with new onset stage 3 type 1 diabetes mellitus (TID).  Under the agreement, 
TrialNet will conduct and provide funding for a Phase 2 

 
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randomized, double-blind, placebo-controlled, clinical trial to investigate the safety and potential efficacy of rezpegaldesleukin in approximately 70 adults 
and children with new onset stage 3 TID.  We will supply rezpegaldesleukin for the trial and will provide support for the study, including pharmacokinetic 
and other analyses.  We will retain all rights to rezpegaldesleukin under the collaboration.
We developed rezpegaldesleukin and own full rights to this drug candidate.  Although we previously entered into a license agreement with Eli 
Lilly and Company in 2017 (the Lilly Agreement) to develop and commercialize rezpegaldesleukin, on April 23, 2023, we received from Lilly a notice of 
at-will termination of the Lilly Agreement, and on April 27, 2023, we announced that we would be regaining full rights to rezpegaldesleukin.  
NKTR-0165
We believe that our preclinical tumor necrosis factor (TNF) receptor type II (TNFR2) agonist asset is a potentially unique bivalent antibody that 
selectively stimulates TNFR2 receptor activity, without modulation of the TNFR1 signaling. TNFR2 signaling drives immunoregulatory function and can 
provide a direct protective effect for tissue cells. TNFR2 is highly expressed on Tregs, neuronal cells and endothelial cells and has been shown to potentiate 
the suppressive effects and overall functional properties of Tregs. Our focus is on TNFR2 antibody candidates that show selective Treg cell binding and 
signaling profiles that may be potentially developed for treatment of autoimmune diseases, such as ulcerative colitis, multiple sclerosis and vitiligo. We are 
currently conducting Investigational New Drug (IND) enabling studies for this program, after having exercised an option to gain an exclusive license to 
specified agonistic antibodies and other materials that were developed pursuant to a research collaboration and license option agreement we entered into 
with Biolojic Design, Ltd. in 2021, with the goal of preparing for an IND submission in the second half of 2025.   
Oncology
NKTR-255
In oncology, we focus on developing medicines based on targeting biological pathways that stimulate and sustain the body’s immune response in 
order to fight cancer. NKTR-255 is an investigational biologic that is designed to target the interleukin-15 (IL-15) pathway in order to activate the body’s 
innate and adaptive immunity. Activation of the IL-15 pathway enhances the survival and function of natural killer (NK) cells and induces survival of both 
effector and CD8+ memory T cells. Recombinant human IL-15 is rapidly cleared from the body and must be administered frequently and in high doses 
limiting its utility due to toxicity. Through optimal engagement of the IL-15 receptor complex, NKTR-255 is designed to enhance functional NK cell 
populations and the formation of long-term immunological memory, which may lead to sustained and durable anti-tumor immune response. 
We are continuing select developmental studies of NKTR-255 in combination with cell therapies and checkpoint inhibitors while we evaluate 
additional strategic partnership pathways for the program. We initiated a Nektar-sponsored Phase 2/3 study to evaluate NKTR-255 following Yescarta® or 
Breyanzi® CD19 CAR-T cell therapy in patients with large B-cell lymphoma, and announced results from the Phase 2 portion of the study at the 66th 
Annual American Association of Hematology (ASH) Meeting in December 2024. Fred Hutchinson Cancer Center is also evaluating NKTR-255 following 
Breyanzi® CD19 CAR-T cell therapy in patients with relapsed/refractory large B-cell lymphoma in an investigator sponsored study. We are continuing our 
oncology clinical collaboration with Merck KGaA to evaluate the maintenance regimen of NKTR-255 in combination with avelumab, a PD-L1 inhibitor, in 
patients with locally advanced or metastatic urothelial carcinoma in the Phase II JAVELIN Bladder Medley study. We expect to receive topline data from 
the study in the first half of 2025. We entered into a new clinical study collaboration with AbelZeta Pharma, Inc. (AbelZeta) (formerly known as CBMG 
Holdings) to study NKTR-255 in combination with its C-TIL051, a tumor-infiltrating lymphocyte (TIL) therapy, in advanced non-small cell lung cancer 
(NSCLC) patients that are relapsed or refractory to anti-PD-1 therapy.  Under the collaboration, we will contribute NKTR-255 and AbelZeta will add 
NKTR-255 to its ongoing AbelZeta-sponsored Phase 1 clinical trial. We also have an ongoing investigator sponsored study evaluating NKTR-255 in 
combination with IMFINZI (darvulumab) in patients with unresectable Stage 3 NSCLC who have received chemoradiation. 
Other Research and Development Programs
We believe it is important to maintain a diverse pipeline of new drug candidates to build on the value of our business. Our discovery research 
organization continues to leverage its deep understanding of immunology to identify new drug candidates in a wide range of molecule classes, including 
proteins, peptides and antibodies. We aim to advance our most promising research drug candidates into preclinical development with the objective of 
advancing these early-stage research programs to human clinical studies over the next several years. 

 
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We believe our preclinical PEG-Colony Stimulating Factor (PEG-CSF1) program, NKTR-422, which is a polyethylene glycol modified version of 
the CSF1 protein that is intended to optimize receptor interaction and to selectively modulate resolution processes of inflammation, has applications in a 
number of therapeutic indications including acute and chronic inflammation as well as fibrosis. We also maintain our preclinical oncology asset, NKTR-
288, which is an investigational PEG conjugate of the protein interferon gamma that is designed utilizing a site-specific conjugation approach to modify 
binding of interferon gamma with one of its substrates and to optimize the pharmacodynamic duration of interferon gamma signaling. We believe this 
program has therapeutic applications in oncology as well as in other infectious diseases.
Many of our drug candidates incorporate advanced and proven polymer conjugate technology, which involves conjugating polyethylene glycol to 
a pharmaceutically active agent, a process often referred to as “PEGylation.” PEGylation has been a highly effective technology for the development of 
therapeutics with significant commercial success, such as Amgen’s Neulasta (pegfilgrastim) and UCB’s CIMZIA (certolizumab pegol). 
Our experience has shown that advanced polymer conjugate technology has the potential to offer one or more of the following benefits:
•
improve efficacy or safety of a drug as a result of better pharmacokinetics, pharmacodynamics, longer half-life and sustained exposure of 
the drug;
•
improve targeting or binding affinity of a drug to its target receptors with the potential to improve efficacy and reduce toxicity or drug 
resistance;
•
improve solubility of a drug;
•
enable oral administration of parenterally-administered drugs, or drugs that must be administered intravenously or subcutaneously, and 
increase oral bioavailability of small molecules;
•
reduce first-pass metabolism effects of certain drug classes with the potential to improve efficacy, which could reduce the need for other 
medicines and reduce toxicity;
•
reduce the rates of drug absorption and of elimination or metabolism by improving stability of the drug in the body and providing it with 
more time to act on its target;
•
differentially alter binding affinity of a drug for multiple receptors, improving its selectivity for one receptor over another; and
•
reduce immune response to certain macromolecules with the potential to prolong their effectiveness with repeated doses.
We believe that our substantial investment in research and development has the potential to create significant value if one or more of our current 
drug candidates demonstrates positive clinical results, receives regulatory approval in one or more major markets and achieves commercial success.
 
We previously owned a manufacturing facility in Huntsville, Alabama (the Facility), which manufactured our proprietary polyethylene glycol 
reagents (PEG reagents) for our PEGylation and advanced polymer conjugate technology operations. As discussed in Notes 1 and 12 to our Consolidated 
Financial Statements, in December 2024, we sold the Facility and assigned our manufacturing and supply agreements to Gannet BioChem, an affiliate of 
Ampersand Management LLC d/b/a Ampersand Capital Partners.
Our Collaboration Partner Programs
We decide on a drug-candidate-by-drug-candidate basis, how far to advance clinical development (e.g., Phase 1, 2 or 3) and whether to 
commercialize products on our own, or seek a partner, or pursue a combination of these approaches. When we determine to seek a partner, our strategy is to 
selectively access a partner’s development, regulatory, or commercial capabilities with the structure of the collaboration depending on factors such as 
economic risk sharing, the cost and complexity of development, marketing and commercialization needs, therapeutic areas, potential for combination of 
drug programs, and geographic capabilities.
Our collaboration partners have advanced drug candidates we invented into commercial drug products. In addition, through our collaborations and 
licensing partnerships with a number of well-known biotechnology and pharmaceutical companies, more than ten products using PEGylation technology 
have received regulatory approval in the U.S. or Europe. The following table outlines our prior collaborations and licensing partnerships. These 
collaborations generally contain one or more elements including a license to our intellectual property rights and manufacturing and supply agreements 
under 

 
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which we may receive or have previously received manufacturing revenue, milestone payments, and/or royalties on commercial sales of drug products.
 
 
 
 
Primary or Target
Drug
 
Drug
 
Indications
 
Marketer/Partner
 
Status(1)
 
   
 
 
ADYNOVATE  and ADYNOVI (brand name for 
ADYNOVATE  in Europe)
  Hemophilia A
Takeda Pharmaceutical 
Company Limited
Approved 2015*
 
   
   
 
MOVANTIK  (naloxegol tablets) and 
MOVENTIG  (brand name for MOVANTIK  in 
Europe)
  Opioid-induced constipation in adult 
patients with chronic non-cancer pain (US);
Opioid-induced constipation in adult 
patients who have and inadequate response 
to laxatives (EU).
AstraZeneca AB
Approved 2014*
 
   
 
   
CIMZIA  (certolizumab pegol)
  Crohn’s disease, Rheumatoid arthritis, and 
Psoriasis/ Ankylosing Spondylitis
UCB Pharma
  Approved 2008**
 
   
 
   
MIRCERA  (C.E.R.A.) (Continuous Erythropoietin 
Receptor Activator)
  Anemia associated with chronic kidney 
disease in patients on dialysis and patients 
not on dialysis
F. Hoffmann-La Roche Ltd
  Approved 2007**
 
   
 
   
Macugen  (pegaptanib sodium injection)
  Age-related macular degeneration
Bausch Health Companies Inc. 
(formerly, Valeant 
Pharmaceuticals International, 
Inc.)
  Approved 2004
 
   
 
 
Somavert  (pegvisomant)
  Acromegaly
Pfizer Inc.
  Approved 2003
 
   
 
   
Dapirolizumab Pegol
  Systemic Lupus Erythematosus
UCB Pharma (Biogen)
  Phase 3
 
(1)
Status definitions are:
Approved — regulatory approval to market and sell product obtained in one or more of the U.S., EU or other countries. Year indicates first regulatory 
approval.
Phase 3 — drug candidate in large-scale clinical trials conducted to obtain regulatory approval to market and sell the drug (these trials are typically 
initiated following encouraging Phase 2 trial results).
*     In December 2020, pursuant to a purchase and sale agreement (the “2020 Purchase and Sale Agreement”) we sold to entities managed by Healthcare 
Royalty Management, LLC (HCR) our rights to receive royalties on future worldwide new sales of ADYNOVATE /ADYNOVI  and 
MOVANTIK /MOVANTIG  (as well as REBINYN  and specified licensed products under a Right to Sublicense Agreement, dated October 27, 
2017) from and after October 1, 2020 until HCR had received payments equal to $210.0 million (the “2025 Threshold”), if the 2025 Threshold were 
achieved on or prior to December 31, 2025, or $240.0 million, if the 2025 Threshold was not achieved on or prior to December 31, 2025 (or, if earlier, 
the date on which the last royalty payment under the relevant license agreements is made). On March 4, 2024, Nektar and HCR amended the 2020 
Purchase and Sale Agreement to remove the cap on the royalties in exchange for a $15.0 million payment to Nektar. 
**   In February 2012, we sold our rights to receive royalties on future worldwide net sales of CIMZIA  and MIRCERA  effective as of January 1, 2012.
 
Government Regulation
Product Development and Approval Process
The research and development, clinical testing, manufacture and marketing of our drug candidates and products using our technologies are subject 
to regulation by the FDA and by comparable regulatory agencies in other countries. These national agencies and other federal, state and local entities 
regulate, among other things, research and development activities 
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and the testing (in vitro, in animals, and in human clinical trials), manufacture, labeling, storage, recordkeeping, approval, marketing, advertising and 
promotion of our products.
Among other things, the approval process required by the FDA before a drug candidate may be marketed in the U.S. will depend on whether the 
chemical composition of the active chemical ingredient in the drug candidate has previously been approved for use in other dosage forms. If the product is 
a new chemical entity that has not been previously approved, the process includes the following:
•
extensive preclinical laboratory and animal testing;
•
submission of an Investigational New Drug (IND) prior to commencing clinical trials;
•
adequate and well-controlled human clinical trials to establish the safety and efficacy of the drug for the intended indication;
•
extensive pharmaceutical development for the characterization of the chemistry, manufacturing process and controls for the active 
ingredient and drug product; and
•
submission to the FDA of a New Drug Application (NDA) for approval of a drug or a Biological License Application (BLA) for approval 
of a biological product.
If the active chemical ingredient has been previously approved by the FDA, the approval process is similar, except that certain preclinical tests, 
including those relating to systemic toxicity normally required for the IND, as well as for NDA or BLA, and clinical trials, may not be necessary if the 
company has a right of reference to existing preclinical or clinical data under Section 505(j) of the Federal Food, Drug, and Cosmetic Act (FDCA) or is 
eligible for approval under Section 505(b)(2) of the FDCA or the biosimilars provisions of the Public Health Services Act.
Preclinical tests include laboratory evaluation of product chemistry and animal studies to assess the safety and efficacy of the product and its 
chosen formulation. Preclinical safety tests must be conducted by laboratories that comply with FDA good laboratory practices (GLP) regulations. The 
results of the preclinical tests for drugs, biological products and combination products subject to the primary jurisdiction of the FDA’s Center for Drug 
Evaluation and Research (CDER) or Center for Biologics Evaluation and Research (CBER) are submitted to the FDA as part of the IND and are reviewed 
by the FDA before clinical trials can begin. Clinical trials may begin 30 days after receipt of the IND by the FDA, unless the FDA raises objections or 
requires clarification within that period. Clinical trials involve the administration of the drug to healthy volunteers or patients under the supervision of a 
qualified, identified medical investigator according to a protocol submitted in the IND for FDA review. Drug products to be used in clinical trials must be 
manufactured according to current good manufacturing practices (cGMP). Clinical trials are conducted in accordance with protocols that detail the 
objectives of the study and the parameters to be used to monitor participant safety and product efficacy as well as other criteria to be evaluated in the study. 
Each protocol is submitted to the FDA in the IND.
Apart from the IND process described above, each clinical study must be reviewed by an independent Institutional Review Board (IRB), and the 
IRB must be kept current with respect to the status of the clinical study. The IRB considers, among other things, ethical factors, the potential risks to 
subjects participating in the trial and the possible liability to the institution where the trial is conducted. The IRB also reviews and approves the informed 
consent form to be signed by the trial participants and any significant changes in the clinical trial.
Clinical trials are typically conducted in three sequential phases. Phase 1 involves the initial introduction of the drug into healthy human subjects 
(in most cases) and the product generally is tested for tolerability, pharmacokinetics, absorption, metabolism and excretion. Phase 2 involves studies in a 
limited patient population to:
•
determine the preliminary efficacy of the product for specific targeted indications;
•
determine dosage and regimen of administration; and
•
identify possible adverse effects and safety risks.
If Phase 2 trials demonstrate that a product appears to be effective and to have an acceptable safety profile, Phase 3 trials are typically undertaken 
to evaluate the further clinical efficacy and safety of the drug and formulation within an expanded patient population at geographically dispersed clinical 
study sites and in large enough trials to provide statistical proof of efficacy and tolerability. The FDA, the clinical trial sponsor, the investigators or the IRB 
may suspend clinical trials at any time if, amongst other reasons, any one of them believes that study participants are being subjected to an unacceptable 
health risk. In some cases, the FDA and the drug sponsor may determine that Phase 2 trials are not needed prior to entering Phase 3 trials.

 
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Following a series of formal meetings and communications between the drug sponsor and the regulatory agencies, the results of product 
development, preclinical studies and clinical studies are submitted to the FDA as an NDA or BLA for approval of the marketing and commercial shipment 
of the drug product. The FDA may deny approval if applicable regulatory criteria are not satisfied or may require additional clinical or pharmaceutical 
testing or requirements. Even if such data are submitted, the FDA may ultimately decide that the NDA or BLA does not satisfy all of the criteria for 
approval. The FDA may refer applications for novel products or products that present difficult questions of safety or efficacy to an advisory committee, 
typically comprised of clinicians and other experts, for evaluation and a recommendation as to whether the application should be approved and, if so, under 
what conditions. The FDA is not bound by the recommendations of an advisory committee, but it considers such recommendations carefully when making 
decisions. Additionally, the approved labeling may narrowly limit the conditions of use of the product, including the intended uses, or impose warnings, 
precautions or contraindications which could significantly limit the potential market for the product. Further, as a condition of approval, the FDA may 
impose post-market surveillance, or Phase 4, studies or risk evaluation and mitigation strategies (REMS). 
Before approving an NDA or BLA, the FDA will inspect the facilities at which the product is manufactured. The FDA will not approve the 
product unless it determines that the manufacturing processes and facilities are in compliance with cGMP requirements and adequate to assure consistent 
production of the product within required specifications. Additionally, before approving an NDA or BLA, the FDA may inspect clinical sites to assure that 
the clinical trials were conducted in compliance with IND study requirements and good clinical practices (GCPs). If the FDA determines the manufacturing 
process or manufacturing facilities are not acceptable, it typically will outline the deficiencies and often will require the facility to take corrective action 
and provide documentation evidencing the implementation of such corrective action, which may delay further review of the application. If the FDA finds 
that a clinical site did not conduct the clinical trial in accordance with GCPs, the FDA may determine the data generated by the site should be excluded 
from the primary efficacy analyses provided in the NDA or BLA, and request additional testing or data. Additionally, the FDA ultimately may still decide 
that the application does not satisfy the regulatory criteria for approval.
In situations where our partners are responsible for clinical and regulatory approval procedures, we may still participate in this process by 
submitting to the FDA a drug master file developed and maintained by us which contains data concerning the manufacturing processes for polymer 
conjugation materials (if incorporated) or drug product. For those products for which we have development responsibility, we prepare and submit an IND 
and are responsible for additional clinical and regulatory procedures for drug candidates being developed under an IND. The clinical and manufacturing, 
development and regulatory review and approval process generally takes a number of years and requires the expenditure of substantial resources. Our 
ability to manufacture and market products, whether developed by us or under collaboration agreements, ultimately depends upon the completion of 
satisfactory clinical trials and success in obtaining marketing approvals from the FDA and equivalent foreign health authorities.
Post-Approval Requirements
Products manufactured or distributed pursuant to FDA approvals are subject to continuing regulation by the FDA, including, among other things, 
requirements relating to monitoring, record-keeping, advertising and promotion, reporting of adverse experiences, and limitations on industry-sponsored 
scientific and educational activities. Further, if there are any modifications to the drug or biologic, including changes in indications, labeling or 
manufacturing processes or facilities, the applicant may be required to submit and obtain FDA approval of a new NDA or BLA or a supplemental NDA or 
BLA supplement, which may require the development of additional data or preclinical studies and clinical trials.
FDA regulations require that approved products be manufactured in specific approved facilities and in accordance with cGMP regulations which 
require, among other things, quality control and quality assurance, the maintenance of records and documentation, and the obligation to investigate and 
correct any deviations from cGMP. Manufacturers and other entities involved in the manufacture and distribution of approved drugs or biologics, and those 
supplying products, ingredients, and components of them, are required to register their establishments with the FDA and certain state agencies, and are 
subject to periodic announced and unannounced inspections by the FDA and certain state agencies for compliance with cGMP requirements and other 
regulatory requirements. Accordingly, manufacturers must continue to expend time, money and effort in the area of production and quality control to 
maintain cGMP compliance. The discovery of violative conditions, including failure to conform to cGMP regulations, could result in enforcement actions.
The FDA strictly regulates marketing, labeling, advertising and promotion of products that are placed on the market. Drugs may be promoted 
only for the approved indications and in accordance with the provisions of the approved label. The FDA does not regulate behavior of physicians in their 
choice of treatments and physicians may legally prescribe available products for uses that are not described in the product’s labeling and that differ from 
those approved by the FDA. However, the FDA does restrict an applicant’s communications on the subject of off-label use of their products. The FDA and 
other agencies actively enforce the laws prohibiting the marketing and promotion of off-label uses, and a company that is found to 

 
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have improperly marketed or promoted off-label use may be subject to significant liability, including criminal and civil penalties under the FDCA and 
False Claims Act, exclusion from participation in federal healthcare programs, and mandatory compliance programs.
The FDA also may require post-marketing testing, known as Phase 4 testing, and surveillance to monitor the effects of an approved product. 
Discovery of previously unknown problems with a product or the failure to comply with applicable FDA requirements can have negative consequences, 
including adverse publicity, restrictions on a product, and judicial or administrative enforcement.
Expedited Development and Review Programs
The FDA is authorized to designate certain products for expedited review if they demonstrate the potential to address an unmet medical need in the 
treatment of a serious or life-threatening disease or condition for which there is no effective treatment. These programs include Fast Track designation and 
Breakthrough Therapy designation.
Fast Track Designation. The FDA may grant “fast track” status to product candidates that are intended to treat serious or life-threatening diseases or 
conditions and demonstrate the potential to address an unmet medical need for the condition. Fast track is a process designed to facilitate the development 
and expedite the review of such product candidates by providing, among other things, more frequent meetings with the FDA to discuss the product 
candidate’s development plan and rolling review, which allows submission of individually completed sections of an NDA or BLA for FDA review before 
the entire submission is completed. Fast Track designation applies to the combination of the product and the specific indication for which it is being 
studied. The sponsor of a product candidate may request the FDA to designate the product as a fast track product at any time during clinical development. 
Fast Track status does not ensure that a product will be developed more quickly or receive FDA approval. In addition, the Fast Track designation may be 
withdrawn by the FDA if the FDA believes that the designation is no longer supported by data emerging in the clinical trial process, or if the designated 
drug development program is no longer being pursued.  On February 11, 2025, we announced that the FDA had granted Fast Track designation for 
rezpegaldesleukin for the treatment of adult and pediatric patients 12 years of age and older with moderate to severe atopic dermatitis whose disease is not 
adequately controlled with topical prescription therapies or when those therapies are not advisable.
Breakthrough Therapy Designation. A product candidate intended to treat a serious or life-threatening disease or condition may also be eligible for 
Breakthrough Therapy designation if preliminary clinical evidence indicates that it may demonstrate substantial improvement over existing therapies on 
one or more clinically significant endpoints. If so designated, the FDA will expedite the development and review of the product candidate’s marketing 
application, including by meeting with, and providing advice to, the sponsor throughout the product candidate’s development, and taking steps to facilitate 
an efficient review of the development program and to ensure that the design of the clinical trials is as efficient as practicable. 
Fast Track designation and Breakthrough Therapy designation do not change the standards for approval but may expedite the development or 
approval process. Moreover, even if a product candidate or platform technology qualifies for one or more of these programs, the FDA may later decide that 
the product candidate or platform technology no longer meets the conditions for qualification or decide that the time period for FDA review or approval 
will not be shortened.
Orphan Drug Designation and Exclusivity
In the U.S., under the Orphan Drug Act, the FDA may grant Orphan Drug Designation to drugs intended to treat a rare disease or condition, which 
is generally a disease or condition that affects fewer than 200,000 individuals in the U.S., or more than 200,000 individuals in the U.S. and for which there 
is no reasonable expectation that the cost of developing and making a biological product or drug in the U.S. for this type of disease or condition will be 
recovered from sales of the product.  The company that obtains the first FDA approval for a designated orphan drug for a rare disease receives marketing 
exclusivity for use of that drug for the designated condition for a period of seven years. In addition, the Orphan Drug Act provides for protocol assistance, 
tax credits, research grants, and exclusions from user fees for sponsors of orphan products. Once a product receives orphan drug exclusivity, a second 
product that is considered to be the same drug for the same indication generally may be approved during the exclusivity period only if the second product is 
shown to be “clinically superior” to the original orphan drug in that it is more effective, safer or otherwise makes a “major contribution to patient care” or 
the holder of exclusive approval cannot assure the availability of sufficient quantities of the orphan drug to meet the needs of patients with the disease or 
condition for which the drug was designated. Similar incentives also are available for orphan drugs in the EU.
Coverage, Reimbursement, and Pricing
Sales of any products for which we may obtain regulatory approval depend, in part, on the coverage and reimbursement status of those products. 
In the U.S., sales of any products for which we may receive regulatory approval for 

 
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commercial sale will depend in part on the availability of coverage and reimbursement from third-party payers. Third-party payers include government 
programs such as Medicare, Medicaid, TRICARE and the Veterans Administration, as well as managed care providers, private health insurers and other 
organizations. Other countries and jurisdictions will also have their own unique mechanisms for approval and reimbursement.
The process for determining whether a payer will provide coverage for a product is typically separate from the process for setting the 
reimbursement rate that the payer will pay for the product. Third-party payers may limit coverage to specific products on an approved list or formulary 
which might not include all of the FDA-approved products for a particular indication. Third-party payers may also refuse to include a particular branded 
drug on their formularies or otherwise restrict patient access to a branded drug when a less costly generic equivalent or other alternative is available. 
Further, private payers often follow the coverage and payment policies established by certain government programs, such as Medicare and Medicaid, which 
require manufacturers to comply with certain rebate, price reporting, and other obligations. For example, the Medicaid Drug Rebate Program, which is part 
of the Medicaid program (a program for financially needy patients, among others), requires pharmaceutical manufacturers to enter into and have in effect a 
national rebate agreement with the Secretary of the Department of Health and Human Services under which the manufacturer agrees to report certain prices 
to the government and pay rebates to state Medicaid programs on outpatient drugs furnished to Medicaid patients, as a condition for receiving federal 
reimbursement for the manufacturer’s outpatient drugs furnished to Medicaid patients. Further, in order for a pharmaceutical product to receive federal 
reimbursement under Medicare Part B and Medicaid programs or to be sold directly to U.S. government agencies, the manufacturer must extend discounts 
to entities eligible to participate in the Public Health Service’s 340B drug pricing program.
Third-party payers are increasingly challenging the prices charged for medical products and services, and examining the medical necessity and 
cost-effectiveness of medical products and services, in addition to their safety and efficacy. Additionally, the containment of healthcare costs has become a 
priority of federal and state governments, and the price of therapeutics have been a focus in this effort. The U.S. government and state legislatures have 
shown significant interest in implementing cost-containment programs, including price controls and restrictions on reimbursement, among other controls. 
Adoption of price controls or other cost-containment measures could limit coverage for or the amounts that federal and state governments or private payers 
will pay for health care products and services, which could also result in reduced demand for our drug candidates or additional pricing pressures and affect 
our ultimate profitability, if approved. If third-party payers do not consider a product to be cost-effective compared to other available therapies, they may 
not cover an approved product or, if they do, the level of payment may not be sufficient to allow us to sell our products at a profit.
The marketability of any products for which we receive regulatory approval for commercial sale may suffer if the government and third-party 
payers fail to provide adequate coverage and reimbursement. Coverage policies and third-party reimbursement rates may change at any time. Even if 
favorable coverage and reimbursement status is attained for one or more products for which we receive regulatory approval, less favorable coverage 
policies and reimbursement rates may be implemented in the future.
Other Healthcare Laws and Regulations
If we obtain regulatory approval of our products, we may be subject to various federal and state laws targeting fraud and abuse in the healthcare 
industry. These laws may impact, among other things, our proposed sales and marketing programs. In addition, we may be subject to patient privacy 
regulations by both the federal government and the states in which we conduct our business. The laws that may affect our ability to operate include:
•
the federal Anti-Kickback Statute, which prohibits, among other things, persons from knowingly and willfully soliciting, receiving, 
offering, or paying remuneration (a term interpreted broadly to include anything of value, including, for example, gifts, discounts, and 
credits), directly or indirectly, in cash or in kind, to induce or reward, or in return for, either the referral of an individual for, or the 
purchase, order, or recommendation of, an item or service reimbursable under a federal healthcare program, such as the Medicare and 
Medicaid programs. A person or entity does not need to have actual knowledge of the federal Anti-Kickback Statute regulatory safe 
harbors or specific intent to violate it to have committed a violation. On December 2, 2020, the Office of Inspector General, or OIG, 
published further modifications to the federal Anti-Kickback Statute regulatory safe harbors. Under the final rules, OIG added safe harbor 
protections under the Anti-Kickback Statute for certain coordinated care and value-based arrangements among clinicians, providers, and 
others. This area of regulation remains a focus and is subject to change in the future. We continue to evaluate what effect, if any, changes 
to the federal Anti-Kickback Statute will have on our business;
•
federal civil and criminal false claims laws and civil monetary penalty laws, which prohibit, among other things, individuals or entities 
from knowingly presenting, or causing to be presented, claims for payment to Medicare, Medicaid, or other third-party payers that are 
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record material to payment of a false claim or avoiding, decreasing, or concealing an obligation to pay money owed to the federal 
government. In addition, the government may assert that a claim including items and services resulting from a violation of the federal 
Anti-Kickback Statute constitutes a false or fraudulent claim for purposes of the FCA. Manufacturers can be held liable under the federal 
False Claims Act even when they do not submit claims directly to government payers if they are deemed to “cause” the submission of 
false or fraudulent claims. The federal False Claims Act also permits a private individual acting as a “whistleblower” to bring actions on 
behalf of the federal government alleging violations of the federal False Claims Act and to share in any monetary recovery;
•
provisions of the federal Health Insurance Portability and Accountability Act of 1996, or HIPAA, which created new federal criminal 
statutes, referred to as the “HIPAA All-payer Fraud Prohibition,” that prohibit knowingly and willfully executing a scheme to defraud 
any healthcare benefit program and making false statements relating to healthcare matters. Similar to the federal Anti-Kickback Statute, a 
person or entity does not need to have actual knowledge of the statute or specific intent to violate it in order to have committed a 
violation;
•
federal transparency laws, including the federal Physician Payment Sunshine Act, which require manufacturers of certain drugs and 
biologics to track and disclose payments and other transfers of value they make to U.S. physicians (currently defined to include doctors, 
dentists, optometrists, podiatrists and chiropractors), other licensed health care practitioners and teaching hospitals as well as physician 
ownership and investment interests in the manufacturer, and that such information is subsequently made publicly available in a 
searchable format on a CMS website;
•
provisions of HIPAA, as amended by the Health Information Technology for Economic and Clinical Health Act and its implementing 
regulations, which imposes certain requirements relating to the privacy, security and transmission of individually identifiable health 
information, and also includes the Final Omnibus Rule published in January 2013, which impose requirements on certain covered 
healthcare providers, health plans, and healthcare clearinghouses as well as their respective business associates, independent contractors 
or agents of covered entities, that perform services for them that involve the creation, maintenance, receipt, use, or disclosure of, 
individually identifiable health information relating to the privacy, security and transmission of individually identifiable health 
information. HITECH also created new tiers of civil monetary penalties, amended HIPAA to make civil and criminal penalties directly 
applicable to business associates, and gave state attorneys general new authority to file civil actions for damages or injunctions in federal 
courts to enforce the federal HIPAA laws and seek attorneys’ fees and costs associated with pursuing federal civil actions. In addition, 
there may be additional federal, state and non-U.S. laws which govern the privacy and security of health and other personal information 
in certain circumstances, many of which differ from each other in significant ways and may not have the same effect, thus complicating 
compliance efforts;
•
federal government price reporting laws, which require us to calculate and report complex pricing metrics in an accurate and timely 
manner to government programs;
•
federal consumer protection and unfair competition laws, which broadly regulate marketplace activities and activities that potentially 
harm consumers; and
•
additionally, state law equivalents of each of the above federal laws, such as anti-kickback and false claims laws which may apply to 
items or services reimbursed by any third-party payer, including commercial insurers, state transparency reporting and compliance laws; 
and state laws governing the privacy and security of health information in certain circumstances, many of which differ from each other in 
significant ways and which may not have the same effect, thus complicating compliance efforts. These state-equivalent laws may also 
apply to our business practices, including, but not limited to, research, distribution, and sales or marketing arrangements. In addition, 
some states have passed laws that require pharmaceutical companies to comply with the April 2003 Office of Inspector General 
Compliance Program Guidance for Pharmaceutical Manufacturers and/or the Pharmaceutical Research and Manufacturers of America’s 
Code on Interactions with Healthcare Professionals. Several states also impose other marketing restrictions or require pharmaceutical 
companies to make marketing or price disclosures to the state and require the registration of pharmaceutical sales.
If our drug candidates become commercialized, it is possible that governmental authorities will conclude that our business practices may not 
comply with current or future statutes, regulations, agency guidance or case law involving applicable fraud and abuse or other healthcare laws and 
regulations. If our operations are found to be in violation of any of these laws or any other governmental regulations that may apply to us, we may be 
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administrative penalties, damages, fines, disgorgement, exclusion from government-funded healthcare programs, such as Medicare and Medicaid, integrity 
and oversight agreements to resolve allegations of non-compliance, contractual damages, reputational harm, diminished profits and future earnings, and the 
curtailment or restructuring of our operations, any of which could adversely affect our ability to operate our business and our results of operations. 
Defending against any such actions can be costly, time-consuming and may require significant financial and personnel resources. Therefore, even if we are 
successful in defending against any such actions that may be brought against us, our business may be impaired.
In each country or jurisdiction outside of the U.S. in which we seek and receive regulatory approval to commercialize our products, we will be 
subject to additional laws and regulations specific to those locations. These regulations and laws will also impact, among other things, our proposed sales 
and marketing programs in those jurisdictions.
Legislative and Regulatory Landscape
From time to time, legislation is drafted, introduced and passed in Congress that could significantly change the statutory provisions governing the 
testing, approval, manufacturing, marketing, coverage and reimbursement of products regulated by the FDA or other government agencies. In addition to 
new legislation, FDA and healthcare fraud and abuse and coverage and reimbursement regulations and policies are often revised or interpreted by the 
agency in ways that may significantly affect our business and our products. For example, in 2010, the United States Congress enacted the Affordable Care 
Act, which, among other things, included changes to the coverage and payment for drug products under government health care programs.
Among the provisions of the Affordable Care Act of importance to potential product candidates are:
•
an annual, nondeductible fee on any entity that manufactures or imports specified branded prescription drugs and biologic agents, 
apportioned among these entities according to their market share in certain government healthcare programs;
•
expansion of eligibility criteria for Medicaid programs, thereby potentially increasing a manufacturer’s Medicaid rebate liability;
•
expanded manufacturers’ rebate liability under the Medicaid Drug Rebate Program;
•
expanded the types of entities eligible for the 340B drug discount program;
•
established the Medicare Part D coverage gap discount program by requiring manufacturers to provide a 70% point-of-sale-discount off 
the negotiated price of applicable brand drugs to eligible beneficiaries during their coverage gap period as a condition for the 
manufacturers’ outpatient drugs to be covered under Medicare Part D; and
•
a Patient-Centered Outcomes Research Institute to oversee, identify priorities in, and conduct comparative clinical effectiveness research, 
along with funding for such research.
Other legislative changes have been proposed and adopted in the United States since the Affordable Care Act was enacted. The Budget Control 
Act of 2011, among other things, created measures for spending reductions by Congress. This includes aggregate reductions of Medicare payments to 
providers up to 2% per fiscal year. Subsequent legislation extended the 2% which remains in effect through 2031. The American Taxpayer Relief Act of 
2012 further reduced Medicare payments to several types of providers, and increased the statute of limitations period for the government to recover 
overpayments to providers from three to five years. Due to the Statutory Pay-As-You-Go Act of 2010, estimated

budget deficit increases resulting from the American Rescue Plan Act of 2021, and subsequent legislation, Medicare payments to providers were further 
reduced starting on January 1, 2025; however, legislation has been introduced in the U.S. Congress that would, if enacted, reverse these payment 
reductions. In addition to provider payment cuts under Medicare, the American Rescue Plan Act of 2021 also eliminated the statutory Medicaid drug rebate 
cap, previously set at 100% of a drug’s average manufacturer price, for single source and innovator multiple source drugs, effective January 1, 2024. These 
laws may result in additional reductions in Medicare and other healthcare funding available for healthcare providers and may otherwise affect the prices we 
may obtain for any of our product candidates for which we may obtain regulatory approval or the frequency with which any such product candidate is 
prescribed or used.
The Inflation Reduction Act of 2022, or IRA, includes several provisions that may impact our business to varying degrees, including provisions 
that reduce the out-of-pocket cap for Medicare Part D beneficiaries to $2,000 starting in 2025; impose new manufacturer financial liability on certain drugs 
under Medicare Part D, allow the U.S. government to negotiate Medicare Part B and Part D price caps for certain high-cost drugs and biologics without 
generic or biosimilar competition, require companies to pay rebates to Medicare for certain drug prices that increase faster than inflation, and delay the 
rebate 

 
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rule that would limit the fees that pharmacy benefit managers can charge. Further, under the IRA, orphan drugs are exempted from the Medicare drug price 
negotiation program, but only if they have one orphan designation and for which the only approved indication is for that disease or condition. If a product 
receives multiple orphan designations or has multiple approved indications, it may not qualify for the orphan drug exemption.  The implementation of the 
IRA is currently subject to ongoing litigation challenging the constitutionality of the IRA’s Medicare drug price negotiation program. The effects of the 
IRA on our business and the healthcare industry in general is not yet known.
Furthermore, federal agencies, Congress, state legislatures, and the private sector have shown significant interest in implementing cost 
containment programs to limit the growth of health care costs, including price controls, restrictions on reimbursement and other fundamental changes to the 
healthcare delivery system. To date, there have been several recent U.S. congressional inquiries, as well as proposed and enacted federal and state 
legislation designed to, among other things, bring more transparency to drug pricing, review the relationship between pricing and manufacturer patient 
programs, reduce the costs of drugs under Medicare and reform government program reimbursement methodologies for drug products. Presidents from 
both political parties in the United States have increasingly relied upon the issuance of executive orders that directly affect prescription drug costs. As a 
number of these orders and other measures by the executive branch may require authorization through additional legislation to become effective, we will 
continue to evaluate what effect, if any, these orders and measures will have on our business.
These measures could reduce the ultimate demand for our products, once approved, or put pressure on our product pricing. Any proposed or actual 
changes could limit coverage for or the amounts that federal and state governments will pay for health care products and services, which could also result in 
reduced demand for our products or additional pricing pressures and affect our ultimate profitability. We expect that additional state and federal healthcare 
reform measures will be adopted in the future, any of which could limit the amounts that federal and state governments will pay for healthcare products and 
services, which could result in reduced demand for our product candidates or additional pricing pressures.
Other Regulations
	
We are also subject to numerous federal, state and local laws relating to such matters as safe working conditions, manufacturing practices, 
environmental protection, fire hazard control and disposal of hazardous or potentially hazardous substances. We may incur significant costs to comply with 
such laws and regulations now or in the future.
Foreign Regulation
	
In addition to regulations in the U.S., sales of our products outside the U.S. are subject to a variety of foreign regulations governing clinical trials and 
commercial sales and distribution of our product candidates to the extent we choose to develop or sell any product candidates outside of the U.S. The 
approval process varies from country to country and the time may be longer or shorter than that required to obtain FDA approval. The requirements 
governing the conduct of clinical trials, product licensing, pricing and reimbursement vary greatly from country to country.
 
Patents and Proprietary Rights
We own more than 150 U.S. and 700 foreign patents and a number of pending patent applications that cover various aspects of research and 
development efforts. We have filed patent applications, and plan to file additional patent applications, covering various aspects of our research and 
development efforts and our drug candidates. More specifically, our patents and patent applications cover polymer architecture, drug candidates, 
formulations, methods of making polymers and polymer conjugates, methods of administering our drug candidates, and methods of manufacturing 
polymers and polymer conjugates. Our patent strategy is to file patent applications on innovations and improvements to cover a significant majority of the 
major pharmaceutical markets in the world. Generally, patents have a term of twenty years from the earliest non-provisional patent application filing 
priority date (assuming all maintenance fees are paid). In some instances, patent terms can be increased or decreased, depending on the laws and 
regulations of the country or jurisdiction that issued the patent.
We also rely on trade secret protection for our confidential and proprietary information. No assurance can be given that we can meaningfully 
protect our trade secrets. Others may independently develop substantially equivalent confidential and proprietary information or otherwise gain access to, 
or disclose, our trade secrets. Please refer to Item 1A. Risk Factors, including but not limited to “We rely on trade secret protection and other unpatented 
proprietary rights for important proprietary technologies, and any loss of such rights could harm our business, results of operations and financial 
condition.” In certain situations in which we work with drugs covered by one or more patents, our ability to develop and commercialize our technologies 
may be affected by limitations in our access to these proprietary drugs. Even if we believe we are free to work with a proprietary drug, we cannot guarantee 
that we will not be accused of, or determined to be, infringing a third party’s rights and be prohibited from working with the drug or found liable for 
damages. Any such restriction on access or liability for damages would have a material adverse effect on our business, results of operations and financial 
condition.

 
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The patent positions of pharmaceutical and biotechnology companies, such as ours, are uncertain and involve complex legal and factual issues. 
There can be no assurance that patents that have issued will be held valid and enforceable in a court of law. Even for patents that are held valid and 
enforceable, the legal process associated with obtaining such a judgment is time consuming and costly. Additionally, issued patents can be subject to inter 
partes review, opposition, reexamination or other proceedings that can result in the revocation of the patent or maintenance of the patent but in an amended 
form (and potentially in a form that renders the patent without commercially relevant or broad coverage). Further, our competitors may be able to 
circumvent and otherwise design around our patents. Even if a patent is issued and enforceable, because development and commercialization of 
pharmaceutical products can be subject to substantial delays, patents may expire early and provide only a short period of protection, if any, following the 
commercialization of products encompassed by our patent. We may have to participate in post-grant proceedings before the U.S. Patent and Trademark 
Office, which could result in a loss of the patent and/or substantial cost to us. Please refer to Item 1A. Risk Factors, including without limitation, “If any of 
our pending patent applications do not issue, or are deemed invalid following issuance, we may lose valuable intellectual property protection.”
U.S. and foreign patent rights and other proprietary rights exist that are owned by third parties and relate to pharmaceutical compositions and 
components of those compositions, as well as equipment and methods for preparation, packaging and delivery of pharmaceutical compositions. We cannot 
predict with any certainty which, if any, of these rights will be considered relevant to our drug candidates by authorities in the various jurisdictions where 
such rights exist, nor can we predict with certainty which, if any, of these rights will or may be asserted against us by third parties. We could incur 
substantial costs in defending ourselves and our partners against any such claims. Furthermore, parties making such claims may be able to obtain injunctive 
or other equitable relief, which could effectively block our ability to develop or commercialize some or all of our products in the U.S. and abroad and could 
result in the award of substantial damages. In the event of a claim of infringement, we or our partners may be required to obtain one or more licenses from 
third parties. There can be no assurance that we can obtain a license to any technology that we determine we need on reasonable terms, if at all, or that we 
could develop or otherwise obtain alternative technology. The failure to obtain licenses if needed may have a material adverse effect on our business, 
results of operations and financial condition. Please refer to Item 1A. Risk Factors, including without limitation, “We may not be able to obtain intellectual 
property licenses related to the development of our drug candidates on a commercially reasonable basis, if at all.”
It is our policy to require our employees and consultants, outside scientific collaborators, sponsored researchers and other advisors who receive 
confidential information from us to execute confidentiality agreements upon the commencement of employment or consulting relationships with us. These 
agreements provide that all confidential information developed or made known to the individual during the course of the individual’s relationship with us is 
to be kept confidential and not disclosed to third parties except in specific circumstances. The agreements provide that all inventions conceived by an 
employee that relate to our business shall be our property. There can be no assurance, however, that these agreements will provide meaningful protection or 
adequate remedies for our trade secrets in the event of unauthorized use or disclosure of such information.
Customer Concentrations
Our revenue has been derived from our collaboration agreements with partners, under which we may receive a combination of revenue elements 
including up-front payments for licensing agreements, clinical research reimbursement or co-funding, milestone payments based on clinical progress, 
regulatory progress or net sales achievements, royalties and/or, before the sale of the Facility, product sales revenue. Our revenues are concentrated among 
a limited number of collaboration partners under long-term arrangements. Before the sale of the Facility, we derived the substantial majority of our 
PEGylation reagent product sales from UCB and Pfizer. Following the 2020 Purchase and Sale Agreement (wherein under a capped return sale 
arrangement we sold our rights to receive royalties on future worldwide new sales of MOVANTIK®/ MOVANTIG® and ADYNOVATE®/ADYNOVI®, as 
well as REBINYN® and specified licensed products), other than our product sales, substantially all of our revenues are non-cash royalty revenues. 
Following the termination of our collaboration agreement with Eli Lilly and Company, we do not have a collaboration agreement for 
rezpegaldesleukin. Therefore, we will not receive collaboration-based revenues for our lead drug candidates, rezpegaldesleukin, NKTR-255 and NKTR-
0165, unless we enter into new collaboration agreements for these drug candidates.
Competition
Competition in the pharmaceutical and biotechnology industry is intense and characterized by aggressive research and development and rapidly-
evolving science, technology, and standards of medical care throughout the world. We frequently compete with pharmaceutical companies and other 
institutions with greater financial, research and development, marketing and sales, manufacturing and managerial capabilities. We face competition from 
these companies not just in product development but also in areas such as recruiting employees, acquiring technologies that might enhance our ability to 
commercialize products, establishing relationships with certain research and academic institutions, enrolling patients in clinical trials and seeking program 
partnerships and collaborations with larger pharmaceutical companies.

 
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Science and Technology Competition
We face intense science and technology competition from a multitude of technologies seeking to enhance the efficacy, safety and ease of use of 
approved drugs and new drug molecule candidates. A number of the drug candidates in our pipeline have direct and indirect competition from large 
pharmaceutical and biopharmaceutical companies. With our use of proven advanced polymer conjugate technologies, we believe we have competitive 
advantages relating to factors such as efficacy, safety, ease of use and cost for certain applications and molecules. We constantly monitor scientific and 
medical developments in order to improve our current technologies, seek licensing opportunities where appropriate, and determine the best applications for 
our business.
Product and Program Specific Competition
Rezpegaldesleukin
There are a number of competitors in various stages of clinical development that are working on programs which are designed to correct the 
underlying immune system imbalance in the body due to autoimmune disease. In particular, we expect to compete with therapies that could be cytokine-
based, microbiome-based, or toleragenic-based therapies (Regeneron, Leo Pharma, Eli Lilly and Company, Galderma, Symbiotix, LLC, Janssen 
Pharmaceuticals, AstraZeneca), regulatory T cell therapies (Sangamo Therapeutics, Inc., Quell Therapeutics, Ltd., Sonoma Biotherapeutics, Inc. GentiBio, 
Inc., Kyvema Therapeutics, Inc. and Tract Therapeutics, Inc.), or IL-2 based therapies (Amgen, Inc., BMS (through its acquisition of Delnia, Inc.), 
Novartis, Inc., ILTOO Pharma, Xencor, inc., Merck & Co (through its acquisition of Pandion Therapeutics), and Sanofi SA).
NKTR-255
There are numerous companies engaged in developing immunotherapies with different approaches to enhancing NK cell populations which are a 
key component of the innate immune system. The approaches include engineered biologics targeting the IL-15 pathway as well as autologous and allogenic 
cell therapy approaches. For NKTR-255, we believe companies that are currently researching and developing engineered IL-15 biologics and cell therapies 
that could compete with this drug candidate include SOTIO Biotech, Inc., Artiva Biotherapeutics, Fate Therapeutics, ImmunityBio, Inc., Nkarta, Inc., 
NKMax America, and Roche/Genentech (through its partnership with Xencor, Inc.).
NKTR-0165
Several companies are developing selective TNFR2 agonists as potential therapies for patients with various autoimmune diseases.  These 
companies often employ an antibody or fusion protein to target the TNFR2 pathway and include Dualyx, TRexBio, Inc., Odyssey Therapeutics, Inc., and 
Pfizer, Inc. 
Research and Development
Our total research and development expenditures can be disaggregated into the following significant types of expenses (in millions):
 
 
 
Year Ended December 31,
 
 
 
2024
   
2023
 
Third party and direct materials costs
 
$
76.8 
 $
51.9 
Personnel, overhead and other costs
 
 
34.6 
  
45.5 
Stock-based compensation and depreciation
 
 
9.4 
  
16.8 
Research and development expense
  $
120.9 
 $
114.2 
 
Manufacturing and Supply
The Facility we sold to Gannet BioChem manufactures PEG reagents for subsequent conjugation to active pharmaceutical ingredients (APIs). The 
Facility can be used to produce APIs themselves, as well as form PEG conjugates of APIs. The Facility and associated equipment are designed to be 
operated to comply with all applicable laws and regulations. As we no longer maintain the capability to directly manufacture PEG reagents for our drug 
candidates, and do not have the capabilities to manufacture biologics or finished drug products for our development programs, we utilize contract 
manufacturers to manufacture all components of our drug candidates and our finished drug products. We will utilize the services of contract manufacturers 
for all phases of clinical development and eventual commercialization. Our contract manufacturers have contractual obligations to comply with all 
applicable laws and regulations.
We source drug materials for our manufacturing activities from one or more suppliers. For the drug materials necessary for our drug candidate 
development, we have agreements for the supply of such drug components with drug manufacturers or suppliers that we believe have sufficient capacity to 
meet our demands. However, from time to time, we 

 
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source critical materials and services from one or a limited number of suppliers and there is a risk that if such supply or services were interrupted, it could 
materially harm our business. As a result of the sale of the Facility, we are dependent on Gannet BioChem for the supply of the PEG reagents used in the 
manufacture of rezpegaldesleukin and NKTR-255. In addition, we typically order materials and services on a purchase order basis for early phase clinical 
development products and enter into long-term supply arrangements only for late-stage products nearing regulatory approval for marketing authorization.
Environment
Before the sale of the Facility, as a manufacturer of PEG reagents for clinical drug candidates and commercial drug products, we were subject to 
inspections generally applicable to manufacturers of important components of pharmaceuticals, particularly inspections carried out by the FDA and the 
U.S. Environmental Protection Agency for compliance with cGMP and other U.S. regulatory requirements, including U.S. federal, state and local 
regulations regarding environmental protection and hazardous and controlled substance controls, among others.  Following the sale of the Facility, we 
remain subject to inspections, including those brought by the FDA as we are sponsor a number of INDs, and environmental regulators as we maintain 
office facilities in San Francisco, California. Environmental laws and regulations are complex, change frequently and have tended to become more 
stringent over time. We incurred significant expenditures to ensure we were in compliance with these laws and regulations. To our knowledge, we 
complied with all material governmental regulations applicable to our business. We would be subject to significant penalties for failure to comply with 
these laws and regulations.
Human Capital
As of December 31, 2024, we had 61 employees, of which 35 employees were engaged in research and development activities. Substantially all of 
our employees are located in the U.S. We have a number of employees who hold advanced degrees, such as a Ph.D. None of our employees are covered by 
a collective bargaining agreement, and we have experienced no work stoppages. We are committed to attracting, developing, advancing and retaining a 
diverse and talented workforce. As part of our measures to attract and retain personnel, we offer a total rewards package to our full-time employees 
consisting of base salary, cash bonuses based on individual and company performance, equity compensation and comprehensive benefits, including health 
insurance, life insurance, retirement plans, and paid holiday and vacation time. We support our employee’s further development by providing professional 
development opportunities. We believe that we maintain good relations with our employees.
To complement our own expert professional staff, we utilize specialists in clinical development, regulatory affairs, pharmacovigilance, process 
engineering, manufacturing and quality assurance. These individuals include scientific advisors as well as independent consultants.
Available Information
Our website address is http://www.nektar.com. The information in, or that can be accessed through, our website is not part of this annual report 
on Form 10-K. Our annual reports on Form 10-K, quarterly reports on Form 10-Q and current reports on Form 8-K and amendments to those reports are 
available, free of charge, on or through our website as soon as reasonably practicable after we electronically file such material with, or furnish it to, the 
Securities Exchange Commission (SEC). The SEC maintains an Internet site that contains reports, proxy and information statements and other information 
regarding our filings at www.sec.gov.
 

 
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Item 1A. Risk Factors
We are providing the following cautionary discussion of risk factors, uncertainties and assumptions that we believe are relevant to our business. 
These are factors that, individually or in the aggregate, we think could cause our actual results to differ materially from expected and historical results and 
our forward-looking statements. We note these factors for investors as permitted by Section 21E of the Exchange Act and Section 27A of the Securities 
Act. Investors in Nektar Therapeutics should carefully consider the risks described below before making an investment decision. You should understand 
that it is not possible to predict or identify all such factors. Consequently, you should not consider this section to be a complete discussion of all potential 
risks or uncertainties that may substantially impact our business. Moreover, we operate in a competitive and rapidly changing environment. New factors 
emerge from time to time and it is not possible to predict the impact of all of these factors on our business, financial condition or results of operations. The 
risks described below may not be the only ones relating to our company.
Risks Related to our Business
We are highly dependent on the success of drug candidates, particularly rezpegaldesleukin (previously referred to as NKTR-358). If these drug 
candidates fail in clinical development our business will be significantly harmed.
Our future success is highly dependent on the clinical success of our drug candidates, particularly rezpegaldesleukin. In general, most 
investigational drugs, including drug candidates designed to treat patients suffering from autoimmune disorders, such as rezpegaldesleukin, do not become 
approved drugs. Accordingly, there is a very meaningful risk that our drug candidates will not succeed in one or more clinical trials sufficient to support 
one or more regulatory approvals.
We previously relied on Lilly (through the Lilly Agreement) to initiate, properly conduct, and prioritize clinical trials and other development-
related activities for rezpegaldesleukin. In February 2023, we announced that the Phase 2 Lupus Study of rezpegaldesleukin in systemic lupus 
erythematosus (SLE) conducted by Lilly did not meet the study’s primary endpoint and that Lilly did not intend to advance rezpegaldesleukin to Phase 3 
development in SLE. On April 27, 2023, we announced that we would be regaining the full rights to rezpegaldesleukin from Lilly, and the Lilly Agreement 
subsequently terminated. Following the return of our rights to develop rezpegaldesleukin, we bear all costs of development. We have initiated two Phase 2b 
rezpegaldesleukin studies: one in patients with moderate-to-severe atopic dermatitis, and another in patients with severe-to-very severe alopecia areata, and 
will collaborate with TrialNet to conduct a Phase 2 study of rezpegaldesleukin in patients with new onset stage 3 TID. We will also explore other 
autoimmune indications for the development of rezpegaldesleukin. While we believe we currently have the materials that are necessary for us to continue 
clinical development of rezpegaldesleukin, we may need or benefit from additional materials that Lilly has not yet transferred to us. In the event Lilly fails 
to promptly and completely transfer to us any additional needed materials or we are not able to independently source these materials, the continued clinical 
development of rezpegaldesleukin and our business will be significantly harmed. Even if the applicable agreement provides us with enforcement or other 
curative rights to address the harm caused by Lilly’s action (or failure to act), our efforts in pursuing a remedy would be costly and there is no guarantee 
that these efforts would succeed or be sufficient to fully address the harm. If continued development of rezpegaldesleukin is not ultimately successful, our 
market valuation, prospects, financial condition and results of operations would be materially harmed.
Additionally, promising results from earlier trials may not predict similarly favorable outcomes in subsequent trials. For example, our drug 
candidates (particularly those being evaluated in the oncology setting) have been tested in clinical trials that utilize an “open-label” trial design. An “open-
label” clinical trial is one where both the patient and investigator know whether the patient is receiving the investigational drug candidate or either an 
existing approved drug or placebo. Most typically, open-label clinical trials test only the investigational drug candidate and sometimes may do so at 
different dose levels. Open-label clinical trials are subject to various limitations that may exaggerate any therapeutic effect as patients in open-label clinical 
trials are aware when they are receiving treatment. Open-label clinical trials may be subject to a “patient bias” where patients perceive their symptoms to 
have improved merely due to their awareness of receiving an experimental treatment. In addition, open-label clinical trials may be subject to an 
“investigator bias” where those assessing and reviewing the physiological outcomes of the clinical trials are aware of which patients have received 
treatment and may interpret the information of the treated group more favorably given this knowledge. The results from an open-label trial may not be 
predictive of future clinical trial results with any of our drug candidates for which we include an open-label clinical trial when studied in a controlled 
environment with a placebo or active control. Also, results from “double blinded” studies where both the patient and investigator do not know whether the 
patient is receiving the investigational drug candidate may not be predictive of future clinical trial results.  One or more clinical failures of our drug 
candidates would jeopardize and could materially harm our business, results of operations and financial condition.

 
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Delays in clinical studies are common and have many causes, and any significant delay in clinical studies being conducted by us or our partners 
could result in delay in regulatory approvals and jeopardize the ability to proceed to commercialization.
We or our partners may experience delays in conducting clinical trials of our drug candidates. Clinical studies may not begin on time, enroll a 
sufficient number of patients or be completed on schedule, if at all. Clinical trials for any of our drug candidates could be delayed for a variety of reasons, 
including:
•
delays in obtaining regulatory authorization to commence a clinical study;
•
delays in reaching agreement with applicable regulatory authorities on a clinical study design;
•
for drug candidates currently or previously partnered with other companies, delays caused by our partner;
•
delays caused by future health epidemics;
•
imposition of a clinical hold by the FDA or other health authorities, which may occur at any time including after any inspection of 
clinical trial operations or trial sites;
•
suspension or termination of a clinical study by us, our partners, the FDA or foreign regulatory authorities due to adverse side effects of a 
drug on subjects in the trial;
•
delays in recruiting suitable patients to participate in a trial;
•
delays in having patients complete participation in a trial or return for post-treatment follow-up;
•
clinical sites dropping out of a trial due to the detriment of enrollment rates;
•
delays in manufacturing and delivery of sufficient supply of clinical trial materials;
•
changes in regulatory authorities policies or guidance applicable to our drug candidates
•
delays caused by changing standards of care or new treatment options; and
•
delays associated with third parties, such as a past collaboration partner, failing to provide us with all the necessary documents, data and 
materials necessary to conduct clinical trials.
If the initiation or completion of any of the planned clinical studies for our drug candidates is delayed for any of the above or other reasons, results 
for the studies would be delayed, and consequently the regulatory approval process would be delayed which would also delay the ability to commercialize 
these drug candidates, which could have a material adverse effect on our business, financial condition and results of operations. Clinical study delays could 
also shorten any commercial periods during which our products have patent protection and may allow our competitors to bring products to market before 
we do, which could impair our ability to successfully commercialize our drug candidates and may harm our business and results of operations.
We currently rely on academic and private non-academic institutions to conduct investigator-sponsored clinical studies or trials of our drug 
candidates. Any failure by the investigator-sponsor to meet its obligations with respect to the clinical development of our drug candidates may 
delay or impair our ability to obtain regulatory approval or commercialize for other drug candidates.
We currently rely on academic and private non-academic institutions to conduct and sponsor clinical studies or trials relating to our drug 
candidates. We do not control the design or conduct of the investigator-sponsored trials, and it is possible that the FDA or non-U.S. regulatory authorities 
will not view these investigator-sponsored studies or trials as providing adequate support for future clinical trials, whether controlled by us or independent 
investigators, for any one or more reasons, including elements of the design or execution of the trials or safety concerns or other trial results.
Such arrangements will likely provide us certain information concerning our drug candidates with respect to the investigator-sponsored studies or 
trials, including access to and the ability to use and reference the data, including for our own regulatory filings, resulting from the investigator-sponsored 
studies or trials. However, we would not have control over the timing and reporting of the data from investigator-sponsored trials, nor would we own the 
data from the investigator-sponsored studies or trials. If we are unable to confirm or replicate the results from the investigator-sponsored studies or trials or 
if negative results are obtained, we would likely be further delayed or prevented from advancing further clinical development of our drug candidates. 
Further, if investigators or institutions breach their obligations with respect to the 

 
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clinical development of our drug candidates, or if the data proves to be inadequate compared to the first-hand knowledge we might have gained had the 
investigator-sponsored studies or trials been sponsored and conducted by us, then our ability to design and conduct any future clinical trials ourselves may 
be adversely affected.
Additionally, the FDA or non-U.S. regulatory authorities may disagree with the sufficiency of our right of reference to the preclinical, 
manufacturing or clinical data generated by these investigator-sponsored studies or trials or our interpretation of preclinical, manufacturing or clinical data 
from these investigator-sponsored studies or trials. If so, the FDA or other non-U.S. regulatory authorities may require us to obtain and submit additional 
preclinical, manufacturing or clinical data before we may initiate our planned clinical trials and/or may not accept such additional data as adequate to 
initiate our planned clinical trials.
The outcomes from the clinical trials of drug candidates from others, and the discovery and development of new potential therapies in immunology 
and oncology, could have a material and adverse impact on the value of the drug candidates in our research and development pipeline.
The research and development of immune-modulatory agents is a very competitive global segment in the biopharmaceutical industry attracting 
tens of billions of dollars of investment each year. Our clinical trial plans for rezpegaldesleukin, NKTR-255 and other drug candidates face substantial 
competition from other regimens already approved, and many more that are either ahead of or in parallel development in patient populations where we are 
studying our drug candidates. As immunotherapy represents a relatively new approach to treatment of autoimmune disorders and cancer and few have 
successfully completed late stage development, drug development in this area entails substantial risks and uncertainties that include rapidly changing 
standards of care, identifying contribution of components when therapeutic combinations are employed, patient enrollment competition, evolving 
regulatory frameworks to evaluate regimens, and varying risk-benefit profiles of competing therapies, any or all of which could have a material and adverse 
impact on the probability of success of our drug candidates.
The risk of clinical failure for any drug candidate remains high prior to regulatory approval and there can be no assurance that our drug 
candidates will obtain regulatory approval for any particular indications.
A number of companies have suffered significant unforeseen failures in clinical studies due to factors such as inconclusive efficacy or safety, even 
after achieving preclinical proof-of-concept or positive results from earlier clinical studies that were satisfactory both to them and to reviewing regulatory 
authorities. Clinical study outcomes remain very unpredictable and it is possible that one or more of our clinical studies could fail at any time due to 
efficacy, safety or other important clinical findings or regulatory requirements. The results from preclinical testing or early clinical trials of a drug 
candidate may not predict the results that will be obtained in later phase clinical trials of the drug candidate. We, the FDA, an independent Institutional 
Review Board (IRB), an independent ethics committee (IEC), or other applicable regulatory authorities may suspend clinical trials of a drug candidate at 
any time for various reasons, including a belief that patients participating in such trials are being exposed to unacceptable health risks or adverse side 
effects. Similarly, an IRB or IEC may suspend a clinical trial at a particular trial site. If one or more of our drug candidates fail in clinical studies, it could 
have a material adverse effect on our business, financial condition and results of operations.
Significant competition could render our partnered and proprietary drugs and drug candidates obsolete or noncompetitive, which would negatively 
impact our business, results of operations and financial condition.
Our partnered and proprietary products and drug candidates compete with various pharmaceutical and biotechnology companies. For 
rezpegaldesleukin, there are a number of competitors in various stages of clinical development that are working on programs which are designed to correct 
the underlying immune system imbalance in the body due to autoimmune disease. In particular, we expect to compete with therapies that could be 
cytokine-based, microbiome-based, or toleragenic-based therapies (Symbiotix, LLC, Janssen, AstraZeneca, and Tizona Therapeutics), regulatory T cell 
therapies (Sangamo Therapeutics, Inc., Quell Therapeutics, Ltd., TxCell, Inc., Sonoma Biotherapeutics, Inc., GentiBio, Inc., Kyvema Therapeutics, Inc., 
and Tract Therapeutics, Inc.), or IL-2-based-therapies (Amgen Inc., BMS, Novartis, Inc., ILTOO Pharma, Xencor, Inc., Merck & Co, through its 
acquisition of Pandion Therapeutics, and Sanofi SA, through its acquisition of Synthorx, Inc.). For NKTR-255, we believe companies that are currently 
researching and developing engineered IL-15 biologics and cell therapies that could compete with this drug candidate include Artiva Biotherapeutics, Fate 
Therapeutics, ImmunityBio, Inc., Nkarta Therapeutics, NKMax America, and Roche/Genentech (through its partnership with Xencor, Inc.).  For NKTR-
0165, we believe companies targeting the TNFR2 pathway for the treatment of patients with autoimmune disease include Dualyx, TRexBio, Inc., Odyssey 
Therapeutics, Inc., and Pfizer, Inc. There can be no assurance that we or our partners will successfully develop, obtain regulatory approvals for and 
commercialize next-generation or new products that will successfully compete with those of our competitors. Many of our competitors have greater 
financial, research and development, marketing and sales, manufacturing and managerial capabilities. We face competition from these companies not just 
in product development but also in areas such as recruiting employees, acquiring technologies that might enhance our 

 
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ability to commercialize products, establishing relationships with certain research and academic institutions, enrolling patients in clinical trials and seeking 
program partnerships and collaborations with larger pharmaceutical companies. As a result, our competitors may succeed in developing competing 
technologies, obtaining regulatory approval or gaining market acceptance for products before we do. These developments could make our products or 
technologies noncompetitive or obsolete.
Preliminary and interim data from our clinical studies that we announce or publish from time to time are subject to audit and verification 
procedures that could result in material changes in the final data and may change as more patient data become available.
From time to time, we publish preliminary or interim data from our clinical studies. Preliminary data remain subject to audit confirmation and 
verification procedures that may result in the final data being materially different from the preliminary data we previously published. Interim data are also 
subject to the risk that one or more of the clinical outcomes may materially change as patient enrollment continues and more patient data become available. 
As a result, preliminary and interim data should be viewed with caution until the final data are available. Material adverse changes in the final data could 
significantly harm our business prospects.
Risks Related to our Financial Condition and Capital Requirement
Additional cost-savings measures may be necessary following implementation of our strategic reorganization plan and cost restructuring plans.
Our 2022 and 2023 Restructuring Plans prioritized key research and development efforts that will impact the Company’s future business activities, 
including activities involving rezpegaldesleukin, NKTR-255, NKTR-0165 and several core research programs. There is no guarantee that these 
Restructuring Plans and their associated cost restructuring measures will achieve their intended benefits or that our post-restructuring focus will be 
sufficient for us to achieve success. Consequently, we may need to undertake additional restructuring and cost-saving activities to further prioritize our key 
research and development efforts and these additional restructuring and cost-saving activities may not be successful, which could have a material adverse 
effect on our business, financial condition and prospects.
Our results of operations and financial condition depend significantly on the ability of our collaboration partners to successfully develop and 
market drugs and they may fail to do so.
Under our collaboration agreements with various pharmaceutical or biotechnology companies, our collaboration partner is generally solely 
responsible for:
•
designing and conducting large scale clinical studies;
•
preparing and filing documents necessary to obtain government approvals to sell a given drug candidate; and/or
•
marketing and selling the drugs when and if they are approved.
Our reliance on collaboration partners poses a number of significant risks to our business, including risks that:
•
we have very little control over the timing and level of resources that our collaboration partners dedicate to commercial marketing efforts 
such as the amount of investment in sales and marketing personnel, general marketing campaigns, direct-to-consumer advertising, 
product sampling, pricing agreements and rebate strategies with government and private payers, manufacturing and supply of drug 
product, and other marketing and selling activities that need to be undertaken and well executed for a drug to have the potential to achieve 
commercial success;
•
even when the applicable contract mandates otherwise, collaboration partners with commercial rights may choose to devote fewer 
resources to the development or marketing of our partnered drugs than they devote to their own drugs or other drugs that they have in-
licensed;
•
we have very little control over the timing and amount of resources our partners devote to development programs in one or more major 
markets;
•
disagreements with partners could lead to delays in, or termination of, the research, development or commercialization of drug candidates 
or to litigation or arbitration proceedings;

 
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•
disputes may arise or escalate in the future with respect to the ownership of rights to technology or intellectual property developed with 
partners;
•
we do not have the ability to unilaterally terminate agreements (or partners may have extension or renewal rights) that we believe are not 
on commercially reasonable terms or consistent with our current business strategy;
•
partners may be unable to pay us as expected;
•
partners may terminate their agreements with us unilaterally for any or no reason, in some cases with the payment of a termination fee 
penalty and in other cases with no termination fee penalty; and
•
partners may respond to natural disasters or health epidemics by ceasing all or some of their development responsibilities (including the 
responsibility to clinical develop our drug candidates).
Given these risks, the success of our current and future collaboration partnerships is highly unpredictable and can have a substantial negative 
impact on our business. If the approved drugs fail to achieve commercial success or the drug candidates in development fail to have positive late stage 
clinical outcomes sufficient to support regulatory approval in major markets, it could significantly impair our access to capital necessary to fund our 
research and development efforts. If we are unable to obtain sufficient capital resources to advance our drug candidate pipeline, it would negatively impact 
the value of our business, results of operations and financial condition.
We have substantial future capital requirements and there is a risk that we may not have access to sufficient capital to meet our current business 
plan. If we do not receive substantial milestone or royalty payments from our existing collaboration agreements, execute new high value 
collaborations or other arrangements, or are unable to raise additional capital in one or more financing transactions, we would be unable to 
continue our current level of investment in research and development.
As of December 31, 2024, we had cash and investments in marketable securities valued at approximately $269.1 million. While we believe that 
our cash position will be sufficient to meet our liquidity requirements through at least the next 12 months, our future capital requirements will depend upon 
numerous unpredictable factors, including:
•
the cost, timing and outcomes of clinical studies and regulatory reviews of our drug candidates, particularly rezpegaldesleukin;
•
if and when we receive potential milestone payments and royalties from our existing collaborations if the drug candidates subject to those 
collaborations achieve clinical, regulatory or commercial success;
•
the progress, timing, cost and results of our clinical development programs;
•
the success, progress, timing and costs of our efforts to implement new collaborations, licenses and other transactions that increase our 
current net cash, such as the sale of additional royalty interests held by us, term loan or other debt arrangements, and the issuance of 
securities;
•
the number of patients, enrollment criteria, primary and secondary endpoints, and the number of clinical studies required by the 
regulatory authorities in order to consider for approval our drug candidates and those of our collaboration partners;
•
our general and administrative expenses, capital expenditures and other uses of cash; and
•
disputes concerning patents, proprietary rights, or license and collaboration agreements that could negatively impact our receipt of 
milestone payments or royalties or require us to make significant payments arising from licenses, settlements, adverse judgments or 
ongoing royalties.
A significant multi-year capital commitment is required to advance our drug candidates through the various stages of research and development in 
order to generate sufficient data to enable high value collaboration partnerships with significant upfront payments or to successfully achieve regulatory 
approval. In the event we do not enter into any new collaboration partnerships with significant upfront payments and we choose to continue to advance our 
drug candidates to later stage research and development, we may need to pursue financing alternatives, including dilutive equity-based financings, such as 
an offering of convertible debt or common stock, which would dilute the percentage ownership of our current common stockholders and could significantly 
lower the market value of our common stock. If sufficient capital is not available to us 

 
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or is not available on commercially reasonable terms, it could require us to delay or reduce one or more of our research and development programs. If we 
are unable to sufficiently advance our research and development programs, it could substantially impair the value of such programs and result in a material 
adverse effect on our business, financial condition and results of operations.
The commercial potential of a drug candidate in development is difficult to predict. If the market size for a new drug is significantly smaller than 
we anticipate, it could significantly and negatively impact our revenue, results of operations and financial condition.
It is very difficult to estimate the commercial potential of drug candidates due to important factors such as safety and efficacy compared to other 
available treatments, including changing standards of care, third party payer reimbursement standards, patient and physician preferences, the availability of 
competitive alternatives that may emerge either during the long drug development process or after commercial introduction, and the availability of generic 
and biosimilar versions of our drug candidates following approval by regulatory authorities based on the expiration of regulatory exclusivity or our inability 
to prevent generic or biosimilar versions from coming to market by asserting our patents. If due to one or more of these risks the market potential for a drug 
candidate is lower than we anticipated, it could significantly and negatively impact the commercial potential of the drug candidate, the commercial terms of 
any collaboration partnership potential for such drug candidate, or if we have already entered into a collaboration for such drug candidate, the revenue 
potential from royalty and milestone payments could be significantly diminished and this would negatively impact our business, financial condition and 
results of operations. We may also depend on our relationships with other companies for sales and marketing performance and the commercialization of 
drug candidates. Poor performance by these companies, or disputes with these companies, could negatively impact our revenue and financial condition.
If government and private insurance programs do not provide payment or reimbursement for our partnered drug or proprietary drugs, those drugs 
will not be widely accepted, which would have a negative impact on our business, results of operations and financial condition.
In the United States and markets in other countries, patients generally rely on third-party payers to reimburse all or part of the costs associated 
with their treatment. In both domestic and foreign markets, sales of our partnered and proprietary products that receive regulatory approval will depend in 
part on market acceptance among physicians and patients, pricing approvals by government authorities and the availability of coverage and payment or 
reimbursement from third-party payers, such as government programs, including Medicare and Medicaid in the U.S., managed care providers, private 
health insurers and other organizations. However, eligibility for coverage does not necessarily signify that a drug candidate will be adequately reimbursed 
in all cases or at a rate that covers costs related to research, development, manufacture, sale, and distribution. Third-party payers are increasingly 
challenging the price and cost effectiveness of medical products and services. Therefore, significant uncertainty exists as to the coverage and pricing 
approvals for, and the payment or reimbursement status of, newly approved healthcare products. For more information, see “Business – Government 
Regulation – Coverage, Reimbursement, and Pricing.”
There is also significant uncertainty related to the insurance coverage and reimbursement of newly approved products and coverage may be more 
limited than the purposes for which the medicine is approved by the FDA or comparable foreign regulatory authorities. In the United States, the principal 
decisions about reimbursement for new medicines are typically made by the Centers for Medicare & Medicaid Services, or CMS, an agency within the U.S. 
Department of Health and Human Services. CMS decides whether and to what extent a new medicine will be covered and reimbursed under Medicare and 
private payers tend to follow CMS to a substantial degree.
Factors payers consider in determining reimbursement are based on whether the product is (i) a covered benefit under its health plan; (ii) safe, 
effective and medically necessary; (iii) appropriate for the specific patient; (iv) cost-effective; and (v) neither experimental nor investigational.
In addition, net prices for drugs may be reduced by mandatory discounts or rebates required by government healthcare programs or private payers 
and by any future relaxation of laws that presently restrict imports of drugs from countries where they may be sold at lower prices than in the United States.
Increasingly, third-party payers are requiring that drug companies provide them with predetermined discounts from list prices and are challenging 
the prices charged for medical products. We cannot be sure that reimbursement will be available for any of our drug candidates that are commercialized 
and, if reimbursement is available, the level of reimbursement.

 
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In addition, many pharmaceutical manufacturers must calculate and report certain price reporting metrics to the government, such as average sales 
price, or ASP, and best price. Penalties may apply in some cases when such metrics are not submitted accurately and timely. Further, these prices for drugs 
may be reduced by mandatory discounts or rebates required by government healthcare programs.
Moreover, legislation and regulations affecting the pricing of pharmaceuticals may change before regulatory agencies approve our proposed 
products for marketing and could further limit coverage or pricing approvals for, and reimbursement of, our products from government authorities and 
third-party payers. Federal agencies, Congress and state legislatures have continued to show interest in implementing cost containment programs to limit 
the growth of health care costs, including price controls, restrictions on reimbursement and other fundamental changes to the healthcare delivery system. In 
addition, in recent years, Congress has enacted various laws seeking to reduce the federal debt level and contain healthcare expenditures, and the Medicare 
and other healthcare programs are frequently identified as potential targets for spending cuts. New government legislation or regulations related to pricing 
or other fundamental changes to the healthcare delivery system as well as a government or third-party payer decision not to approve pricing for, or provide 
adequate coverage or reimbursement of, our products hold the potential to severely limit market opportunities of such products.
In addition, in some foreign countries, the proposed pricing for a drug must be approved before it may be lawfully marketed. The requirements 
governing drug pricing vary widely from country to country. For example, the European Union provides options for its Member States to restrict the range 
of medicinal products for which their national health insurance systems provide reimbursement and to control the prices of medicinal products for human 
use. To obtain reimbursement or pricing approval, some of these countries may require the completion of clinical trials that compare the cost effectiveness 
of a particular product candidate to currently available therapies. A Member State may approve a specific price for the medicinal product or it may instead 
adopt a system of direct or indirect controls on the profitability of the company placing the medicinal product on the market. There can be no assurance that 
any country that has price controls or reimbursement limitations for pharmaceutical products will allow favorable reimbursement and pricing arrangements 
for any of our drug candidates. Historically, products launched in the European Union do not follow price structures of the U.S. and generally prices tend to 
be significantly lower.
If we are unable to establish and maintain collaboration partnerships on attractive commercial terms, our business, results of operations and 
financial condition could suffer.
We intend to continue to seek partnerships with pharmaceutical and biotechnology partners to fund a portion of our research and development 
capital requirements. The timing of new collaboration partnerships is difficult to predict due to availability of clinical data, the outcomes from our clinical 
studies, the number of potential partners that need to complete due diligence and approval processes, the definitive agreement negotiation process and 
numerous other unpredictable factors that can delay, impede or prevent significant transactions. If we are unable to find suitable partners or negotiate 
collaboration arrangements with favorable commercial terms with respect to our existing and future drug candidates or the licensing of our intellectual 
property, or if any arrangements we negotiate, or have negotiated, are terminated, it could have a material adverse effect on our business, financial 
condition and results of operations.
Our revenue has historically been exclusively derived from our collaboration agreements, which can result in significant fluctuation in our 
revenue from period to period, and our past revenue is therefore not necessarily indicative of our future revenue.
Our revenue has historically been exclusively derived from our collaboration agreements (whether based on our drug candidates or polymeric 
reagents), from which we receive upfront fees, research and development reimbursement and funding, milestone and other contingent payments based on 
clinical progress, regulatory progress or net sales achievements, royalties and product sales. Significant variations in the timing of receipt of cash payments 
and our recognition of revenue can result from payments based on the execution of new collaboration agreements, the timing of clinical outcomes, 
regulatory approval, commercial launch or the achievement of certain annual sales thresholds. The amount of our revenue derived from collaboration 
agreements in any given period will depend on a number of unpredictable factors, including whether and when we or our collaboration partners achieve 
clinical, regulatory and sales milestones, the timing of regulatory approvals in one or more major markets, reimbursement levels by private and government 
payers, and the market introduction of new drugs or generic versions of the approved drug, as well as other factors. Our past revenue generated from 
collaboration agreements is not necessarily indicative of our future revenue. If any of our existing or future collaboration partners fails to develop, obtain 
regulatory approval for, manufacture or ultimately commercialize any drug candidate under our collaboration agreement, our business, financial condition, 
and results of operations could be materially and adversely affected.

 
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We expect to continue to incur substantial losses and negative cash flow from operations and may not achieve or sustain profitability in the future.
For the year ended December 31, 2024, we reported a net loss of $119.0 million. If and when we achieve profitability depends upon a number of 
factors, including the timing and recognition of milestones and other contingent payments and royalties received, the timing of revenue under our 
collaboration agreements, the amount of investments we make in our proprietary drug candidates and the regulatory approval and market success of our 
drug candidates. We may not be able to achieve and sustain profitability.
Other factors that will affect whether we achieve and sustain profitability include our ability, alone or together with our partners, to:
•
develop drugs utilizing our technologies, either independently or in collaboration with other pharmaceutical or biotechnology companies;
•
effectively estimate and manage clinical development costs, particularly the cost of the clinical studies for rezpegaldesleukin and NKTR-
255;
•
receive necessary regulatory and marketing approvals;
•
maintain or expand manufacturing at necessary levels;
•
achieve market acceptance of our partnered products;
•
receive revenue or royalties on products that have been approved, marketed or submitted for marketing approval with regulatory 
authorities; and
•
maintain sufficient funds to finance our activities.
Risks Related to Supply and Manufacturing
If our contract manufacturers are not able to manufacture biologic substance or substances in sufficient quantities that meet applicable quality 
standards, it could delay clinical studies, result in reduced sales or constitute a breach of our contractual obligations, any of which could 
significantly harm our business, financial condition and results of operations.
If our contract manufacturing organizations (CMOs) are not able to manufacture and supply sufficient drug quantities meeting applicable quality 
standards required to support large clinical studies or commercial manufacturing in a timely manner, it could delay our or our collaboration partners’ 
clinical studies or result in a breach of our contractual obligations, which could in turn reduce the potential commercial sales of our or our collaboration 
partners’ products. As a result, we could incur substantial costs and damages and any product sales or royalty revenue that we would otherwise be entitled 
to receive could be reduced, delayed or eliminated. In most cases, we rely on CMOs to manufacture and supply drug product for our clinical studies and 
those of our collaboration partners.  As a result of the sale of the Facility, we are currently dependent on Gannet BioChem for the supply of the PEG 
reagents used in the manufacture of our PEG-conjugate drug candidates, including rezpegaldesleukin and NKTR-255. The manufacturing of biologics 
involves significant risks and uncertainties related to the demonstration of adequate stability, sufficient purification of the drug substance and drug product, 
the identification and elimination of impurities, optimal formulations, process and analytical methods validations, and challenges in controlling for all of 
these variables. We have faced and may in the future face significant difficulties, delays and unexpected expenses as we validate third party CMOs required 
for drug supply to support our clinical studies and the clinical studies and products of our collaboration partners. Failure by our CMOs to supply API or 
drug products in sufficient quantities that meet all applicable quality requirements could result in supply shortages for our clinical studies or the clinical 
studies and commercial activities of our collaboration partners. Such failures could significantly and materially delay clinical trials and regulatory 
submissions or result in reduced sales, any of which could significantly harm our business prospects, results of operations and financial condition.
If any CMO with whom we contract fails to perform its obligations, we may be forced to manufacture the materials ourselves, for which we may 
not have the capabilities or resources, or enter into an agreement with a different CMO, which we may not be able to do on reasonable terms, if at all. In 
either scenario, our clinical trials or commercial distribution could be delayed significantly as we establish alternative supply sources. In some cases, the 
technical skills required to manufacture our products or drug candidates may be unique or proprietary to the original CMO and we may have difficulty, or 
there may be contractual restrictions prohibiting us from, transferring such skills to a back-up or alternate supplier, or we may be unable 

 
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to transfer such skills at all. In addition, if we are required to change CMOs for any reason, we will be required to verify that the new CMO maintains 
facilities and procedures that comply with quality standards and with all applicable regulations. We will also need to verify, such as through a 
manufacturing comparability study, that any new manufacturing process will produce our product according to the specifications previously submitted to or 
approved by the FDA or another regulatory authority. The delays associated with the verification of a new CMO could negatively affect our ability to 
develop drug candidates or commercialize our products in a timely manner or within budget. Furthermore, a CMO may possess technology related to the 
manufacture of our drug candidate that such CMO owns independently. This would increase our reliance on such a CMO or require us to obtain a license 
from such CMO in order to have another CMO manufacture our products or drug candidates. In addition, in the case of the CMOs that supply our drug 
candidates, changes in manufacturers often involve changes in manufacturing procedures and processes, which could require that we conduct bridging 
studies between our prior clinical supply used in our clinical trials and that of any new manufacturer. We may be unsuccessful in demonstrating the 
comparability of clinical supplies which could require the conduct of additional clinical trials.
Building and validating large scale clinical or commercial-scale manufacturing facilities and processes, recruiting and training qualified personnel 
and obtaining necessary regulatory approvals is complex, expensive and time consuming. In the past, we have encountered challenges in scaling up 
manufacturing to meet the requirements of large scale clinical trials without making modifications to the drug formulation, which may cause significant 
delays in clinical development. There continues to be substantial and unpredictable risk and uncertainty related to manufacturing and supply until such time 
as the commercial supply chain is validated and proven.
We purchase some of the starting material for biologics and biologic candidates from a single source or a limited number of suppliers, and the 
partial or complete loss of one of these suppliers could cause production delays, clinical trial delays, potential loss of revenue and contract liability 
to third parties.
We often face very limited supply of a critical raw material that can only be obtained from a single, or a limited number of, suppliers, which could 
cause production delays, clinical trial delays, potential lost revenue opportunities or contract liabilities to third parties. For example, there are only a limited 
number of qualified suppliers, and in some cases single source suppliers, for the raw materials included in our PEGylation and advanced polymer conjugate 
drug formulations. Any interruption in supply, diminution in quality of raw materials supplied to us or failure to procure such raw materials on 
commercially feasible terms could harm our business by delaying our clinical trials, impeding commercialization of approved drugs or increasing our costs.
The manufacturing operations of our contract manufacturers are subject to laws and other governmental regulatory requirements, which, if not 
met, would have a material adverse effect on our business, results of operations and financial condition.
Our CMOs are required in certain cases to maintain compliance with current good manufacturing practices (cGMP), including cGMP guidelines 
applicable to active pharmaceutical ingredients, and drug products, and with laws and regulations governing manufacture and distribution of controlled 
substances, and are subject to inspections by the FDA, or comparable agencies in other jurisdictions administering such requirements. We anticipate 
periodic regulatory inspections of the manufacturing facilities of our CMOs for compliance with applicable regulatory requirements. Any failure of our 
CMOs to follow and document adherence to such cGMP and other laws and governmental regulations or satisfy other manufacturing and product release 
regulatory requirements may lead to significant delays in the availability of products for commercial use or clinical study, result in the termination or hold 
on a clinical study or delay or prevent filing or approval of marketing applications for our products. Failure to comply with applicable laws and regulations 
may also result in sanctions being imposed on us, including fines, injunctions, civil penalties, failure of regulatory authorities to grant marketing approval 
of our products, delays, suspension or withdrawal of approvals, license revocation, seizures, administrative detention, or recalls of products, operating 
restrictions and criminal prosecutions, any of which could harm our business. Regulatory inspections could result in costly manufacturing changes or 
facility or capital equipment upgrades to satisfy the FDA that our manufacturing and quality control procedures are in substantial compliance with cGMP. 
Manufacturing delays for our CMOs pending resolution of regulatory deficiencies or suspensions could have a material adverse effect on our business, 
results of operations and financial condition.
Risks Related to Business Operations
We depend on third parties to conduct the preclinical studies and clinical trials for our drug candidates and any failure of those parties to fulfill their 
obligations according to protocol standards could harm our development plans and adversely affect our business.
We depend on our collaboration partners, independent clinical investigators, contract research organizations and other third-party service 
providers to conduct preclinical studies and clinical trials for our drug candidates, including to 

 
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monitor, record, manage and analyze data generated from these studies. We rely heavily on these parties for the successful execution of our preclinical 
studies and clinical trials. Though we are ultimately responsible for the results of their activities, many aspects of their activities are beyond our control, 
such as the timing, conduct and management of data developed through these studies and trials. For example, we are responsible for ensuring that each of 
our clinical trials is conducted in accordance with the general investigational plan and protocols for the trials, but the independent clinical investigators may 
prioritize other projects over ours or communicate issues regarding our drug candidates to us in an untimely manner. Third parties may not complete 
activities on schedule or may not conduct our clinical trials in accordance with regulatory requirements, such as good laboratory practice or good clinical 
practice, or our stated protocols and any subsequent data generated may be deemed unacceptable. We rely on our collaboration partners and other third 
parties to manage, analyze and transmit clinical data, and those partners and third parties may not carry out the performance of their duties with the 
required degree of care or skill to ensure valid and scientifically reliable work products. The early termination of any of our clinical trial arrangements, the 
failure of third parties to comply with the regulations and requirements governing clinical trials, the failure of third parties to properly conduct our clinical 
trials, or erroneously reported data could hinder or delay the development, approval and commercialization of our product candidates and would adversely 
affect our business, results of operations and financial condition.
Our future depends on the proper management of our current and future business operations and their associated expenses.
Our business strategy requires us to manage our business to provide for the continued development of our proprietary drug candidates. Our 
strategy also calls for us to manage the capital necessary to fund key programs through value-enhancing data and other milestones. If we are unable to 
manage effectively our current operations, our business, financial condition and results of operations may be adversely affected. If we are unable to 
effectively manage our expenses, we may find it necessary to reduce our personnel-related costs through reductions in our workforce, which could harm 
our operations, employee morale and impair our ability to retain and recruit talent. Furthermore, if adequate funds are not available, we may be required to 
obtain funds through arrangements with partners or other sources that may require us to relinquish rights to certain of our technologies, products or future 
economic rights that we would not otherwise relinquish or require us to enter into other dilutive financing arrangements on unfavorable terms.
Because competition for highly qualified technical personnel is intense, we may not be able to attract and retain the personnel we need to support 
our operations and growth.
We must attract and retain experts in the areas of research, development (including clinical testing), manufacturing, regulatory and finance, and 
may need to attract and retain commercial, marketing and distribution experts and develop additional expertise in our existing personnel. We face intense 
competition from other biopharmaceutical companies, research and academic institutions and other organizations for qualified personnel. Many of the 
organizations with which we compete for qualified personnel have greater resources than we have. Because competition for skilled personnel in our 
industry is intense, companies such as ours sometimes experience high attrition rates with regard to their skilled employees. Further, in making 
employment decisions, job candidates often consider the value of the stock awards they are to receive in connection with their employment. Our equity 
incentive plan and employee benefit plans may not be effective in motivating or retaining our employees or attracting new employees, and significant 
volatility in the price of our stock may adversely affect our ability to attract or retain qualified personnel. Furthermore, as a result of our 2022 and 2023 
Restructuring Plans, our employees may experience distractions or decreases in employee morale and we may experience increased levels of employee 
attrition and turnover, which would adversely affect our business. If we fail to attract new personnel or to retain and motivate our current personnel, our 
business and future growth prospects could be severely harmed.
We are dependent on our management team and key technical personnel, and the loss of any key manager or employee may impair our ability to 
develop our products effectively and may harm our business, operating results and financial condition.
Our success largely depends on the continued services of our executive officers and other key personnel. The loss of one or more members of our 
management team or other key employees could seriously harm our business, operating results and financial condition. The relationships that our key 
managers have cultivated within our industry make us particularly dependent upon their continued employment with us. We are also dependent on the 
continued services of our technical personnel because of the highly technical nature of our products and the regulatory approval process. Because our 
executive officers and key employees are not obligated to provide us with continued services, they could terminate their employment with us at any time 
without penalty. We do not have any post-employment noncompetition agreements with any of our employees and do not maintain key person life 
insurance policies on any of our executive officers or key employees.

 
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Inflation has increased our operating costs and could negatively impact our operations.
Increased price levels resulting from inflation have resulted in increased operating costs. In addition, the United States Federal Reserve has raised 
and held interest rates at higher levels than in the past decade in response to concerns about inflation. Increases in interest rates, especially if coupled with 
reduced government spending and volatility in financial markets, may further increase economic uncertainty and heighten these risks.
Our business could be adversely affected by the effects of future health epidemics.
Our business could be adversely affected, directly or indirectly, by health epidemics in regions where we have concentrations of clinical trial 
sites or other business operations,including the manufacturing operations of third parties upon whom we rely. Health epidemics can negatively affect our 
clinical trials and those run by our collaborators or other third parties through delays in investigator recruitment, clinical site initiation, patient screening, or 
patient enrollment.  In addition, health epidemics may cause disruptions in our supply chain or shortages in raw materials and equipment, which would 
affect our ability to supply drug candidates for clinical trials. 
If the health epidemic is sufficiently severe and widespread, it may require us to change the way in which can conduct our business, which may 
negatively result in unexpected expenses, decreased employee productivity and availability and employee work culture. Further, a severe and widespread 
epidemic may have a broad impact on global financial markets and could reduce our ability to access capital, which could in the future negatively affect our 
liquidity. In addition, a recession or market correction resulting from a health epidemic could materially affect our business and the value of our common 
stock.
The ultimate effects of health epidemics is uncertain and subject to change and these effects could have a negative impact on our clinical trial 
timelines, operations, financial condition and prospects. 
Risks Related to Intellectual Property, Litigation and Regulatory Concerns
If we or our partners do not obtain regulatory approval for our drug candidates on a timely basis, or at all, or if the terms of any approval impose 
significant restrictions or limitations on use, our business, results of operations and financial condition will be negatively affected.
We or our partners may not obtain regulatory approval for drug candidates on a timely basis, or at all, or the terms of any approval (which in some 
countries includes pricing approval) may impose significant restrictions or limitations on use. Drug candidates must undergo rigorous animal and human 
testing and an extensive review process for safety and efficacy by the FDA and equivalent foreign regulatory authorities. The time required for obtaining 
regulatory decisions is uncertain and difficult to predict. The FDA and other U.S. and foreign regulatory authorities have substantial discretion, at any 
phase of development, to terminate clinical studies, require additional clinical development or other testing, delay or withhold registration and marketing 
approval and mandate product withdrawals, including recalls. Further, regulatory authorities have the discretion to analyze data using their own 
methodologies that may differ from those used by us or our partners, which could lead such authorities to arrive at different conclusions regarding the 
safety or efficacy of a biologic candidate. In addition, undesirable side effects caused by our drug candidates could cause us or regulatory authorities to 
interrupt, delay or halt clinical trials and could result in a more restricted label or the delay or denial of regulatory approval by regulatory authorities.
Even if we or our partners receive regulatory approval of a product, the approval may limit the indicated uses for which the drug may be marketed. 
Our and our partnered drugs that have obtained regulatory approval, and the manufacturing processes for these products, are subject to continued review 
and periodic inspections by the FDA and other regulatory authorities. Discovery from such review and inspection of previously unknown problems may 
result in restrictions on marketed products or on us, including withdrawal or recall of such products from the market, suspension of related manufacturing 
operations or a more restricted label. The failure to obtain timely regulatory approval of drug candidates, any product marketing limitations or a product 
withdrawal would negatively impact our business, results of operations and financial condition.
We may seek orphan drug status or Breakthrough Therapy or Fast Track designations or other designation for one or more of our drug 
candidates, but even if any such designation or status is granted, it may not lead to a faster development process or regulatory review and may not 
increase the likelihood that our drug candidates will receive marketing approval, and we may be unable to maintain any benefits associated with 
such designations or status, including market exclusivity.
We have been awarded Fast Track designation for rezpegaldesleukin for the treatment of adult and pediatric patients 12 years of age and older 
with moderate-to-severe atopic dermatitis whose disease is not adequately controlled with topical prescription therapies or when those therapies are not 
advisable, and may seek in the future, Breakthrough Therapy or Fast Track designation for current or future drug candidates. Receipt of a designation to 
facilitate drug candidate development is within the discretion of the FDA. Accordingly, even if we believe one of our drug candidates meets the criteria for 
a designation, the FDA may disagree. In any event, the receipt of such a designation for our drug candidates may not result in a faster development process, 
review, or approval compared to drug candidates considered for approval under conventional 

 
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FDA procedures and does not ensure ultimate marketing approval by the FDA. In addition, the FDA may later decide that the product candidates no longer 
meet the designation conditions.
Regulatory authorities in some jurisdictions, including the United States and Europe, may designate drugs for relatively small patient populations 
as orphan drugs. We may not be able to obtain orphan drug designation for any indications for our drug candidates, and we may not be able to maintain 
such designations if granted. 
Generally, if a drug candidate with an orphan drug designation subsequently receives the first marketing approval for the indication for which it 
has such designation, the product is entitled to a period of marketing exclusivity, which precludes the FDA from approving another marketing application 
for the same drug or biologic for the same indications for seven years. Even if we are able to obtain orphan drug designation or orphan drug exclusivity, 
that exclusivity may not effectively protect the product from competition because different drugs can be approved for the same condition. Even after an 
orphan drug is approved, the FDA can subsequently approve the same drug for the same condition if, among other things, the FDA concludes that the later 
drug is clinically superior, if it is shown to be safer, more effective or makes a major contribution to patient care. Orphan drug designation does not convey 
any advantage in or shorten the duration of the regulatory review and approval process. Even if we receive orphan drug designation or orphan drug 
exclusivity for any of our drug candidates, there is no guarantee that we will enjoy the benefits of such designations or exclusivity periods. 
The decision of the U.S. Court of Appeals for the 11th Circuit in Catalyst Pharms., Inc. v. Becerra, 14 F.4th 1299 (11th Cir. 2021) has created 
uncertainty regarding the scope of orphan drug exclusivity. Although the FDA subsequently announced that it intends to continue to apply its longstanding 
interpretation of the regulations to matters outside of the scope of the Catalyst order and continue tying the scope of orphan drug exclusivity to the uses or 
indications for which a drug is approved, it is unclear how future litigation, legislation, agency decisions, and administrative actions will impact the scope 
of the orphan drug exclusivity. 
Even if we receive regulatory approval of our drug candidates, we will be subject to ongoing regulatory obligations and continued regulatory 
review, which may result in significant additional expense and we may be subject to penalties if we fail to comply with regulatory requirements or 
experience unanticipated problems with our drug candidates. 
Any regulatory approvals that we receive for our drug candidates will require surveillance to monitor the safety and efficacy of the drug 
candidate. The FDA may also require a REMS in order to approve our drug candidates, which could entail requirements for a medication guide, physician 
communication plans or additional elements to ensure safe use, such as restricted distribution methods, patient registries and other risk minimization tools. 
In addition, if the FDA or a comparable foreign regulatory authority approves our drug candidates, the manufacturing processes, labeling, packaging, 
distribution, adverse event reporting, storage, advertising, promotion, import, export and recordkeeping for our drug candidates will be subject to extensive 
and ongoing regulatory requirements. These requirements include submissions of safety and other post-marketing information and reports, registration, as 
well as continued compliance with applicable cGMP, GLP and GCP requirements, for any clinical trials that we conduct post-approval. For certain 
commercial prescription drug products, manufacturers and other parties involved in the supply chain must also meet chain of distribution requirements and 
build electronic, interoperable systems for product tracking and tracing and for notifying the FDA of counterfeit, diverted, stolen and intentionally 
adulterated products or other products that are otherwise unfit for distribution in the United States. Later discovery of previously unknown problems with 
our drug candidates, including adverse events of unanticipated severity or frequency, or with our third-party manufacturers or manufacturing processes, or 
failure to comply with regulatory requirements, may result in, among other things: 
•
restrictions on the marketing or manufacturing of our drug candidates, withdrawal of the product from the market or voluntary or 
mandatory product recalls; 
•
manufacturing delays and supply disruptions where regulatory inspections identify observations of noncompliance requiring remediation; 
•
revisions to the labeling, including limitation on approved uses or the addition of additional warnings, contraindications or other safety 
information, including boxed warnings; 
•
imposition of a REMS, which may include distribution or use restrictions; 
•
requirements to conduct additional post-market clinical trials to assess the safety of the product; 
•
fines, warning letters or holds on clinical trials; 
•
refusal by the FDA to approve pending applications or supplements to approved applications filed by us or suspension or revocation of 
approvals; 
•
product seizure or detention, or refusal to permit the import or export of our drug candidates; and 
•
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Further, if any of our drug candidates are approved and we are found to have improperly promoted off-label uses of those products, we may 
become subject to significant liability. The FDA and other regulatory agencies strictly regulate the promotional claims that may be made about prescription 
products, if approved. In particular, while the FDA permits the dissemination of truthful and non-misleading information about an approved product, a 
manufacturer may not promote a product for uses that are not approved by the FDA or such other regulatory agencies as reflected in the product’s approved 
labeling. If we are found to have promoted such off-label uses, we may become subject to significant liability. The federal government has levied large 
civil and criminal fines against companies for alleged improper promotion of off-label use and has enjoined several companies from engaging in off-label 
promotion. The FDA has also requested that companies enter into consent decrees, corporate integrity agreements or permanent injunctions under which 
specified promotional conduct must be changed or curtailed. If we cannot successfully manage the promotion of our drug candidates, if approved, we could 
become subject to significant liability, which would materially adversely affect our business and financial condition.
Additionally, sponsors of approved drugs and biologics must provide 6 months’ notice to the FDA of any changes in marketing status, such as 
the withdrawal of a drug, and failure to do so could result in the FDA placing the product on a list of discontinued products, which would revoke the 
product’s ability to be marketed. The FDA’s and other regulatory authorities’ policies may change and additional government regulations may be enacted 
that could prevent, limit or delay regulatory approval of our drug candidates. We cannot predict the likelihood, nature or extent of government regulation 
that may arise from future legislation or administrative action, either in the United States or abroad. If we are slow or unable to adapt to changes in existing 
requirements or the adoption of new requirements or policies, or if we are not able to maintain regulatory compliance, we may lose any marketing approval 
that we may have obtained and we may not achieve or sustain profitability. 
We are a party to numerous collaboration agreements and other significant agreements which contain complex commercial terms that could result 
in disputes, litigation or indemnification liability that could adversely affect our business, results of operations and financial condition.
We currently derive, and expect to derive in the foreseeable future, substantially all of our revenue from collaboration agreements with 
biotechnology and pharmaceutical companies. These collaboration agreements contain complex commercial terms, including:
•
clinical development and commercialization obligations that are based on certain commercial reasonableness performance standards that 
can often be difficult to enforce if disputes arise as to adequacy of our partner’s performance;
•
research and development performance and reimbursement obligations for our personnel and other resources allocated to partnered 
biologic candidate development programs;
•
clinical and commercial manufacturing agreements, some of which are priced on an actual cost basis for products supplied by us to our 
partners with complicated cost allocation formulas and methodologies;
•
intellectual property ownership allocation between us and our partners for improvements and new inventions developed during the course 
of the collaboration;
•
royalties on drug sales based on a number of complex variables, including net sales calculations, geography, scope of patent claim 
coverage, patent life, generic competitors, bundled pricing and other factors; and
•
indemnity obligations for intellectual property infringement, product liability and certain other claims.
We are a party to numerous significant collaboration agreements and other strategic transaction agreements (e.g. financings and asset divestitures) 
that contain complex representations and warranties, covenants and indemnification obligations. If we are found to have materially breached such 
agreements, we could be subject to substantial liabilities, which would harm our financial condition.
From time to time, we are involved in litigation matters involving the interpretation and application of complex terms and conditions of our 
agreements. One or more disputes may arise or escalate in the future regarding our collaboration agreements, transaction documents, or third-party license 
agreements that may ultimately result in costly litigation and unfavorable interpretation of contract terms, which would have a material adverse effect on 
our business, financial condition and results of operations.
We may not be able to obtain intellectual property licenses related to the development of our drug candidates on a commercially reasonable basis, 
if at all.
Numerous pending and issued U.S. and foreign patent rights and other proprietary rights owned by third parties relate to pharmaceutical 
compositions, methods of preparation and manufacturing, and methods of use and administration. We 

 
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cannot predict with any certainty which, if any, patent rights will be considered relevant to our or our collaboration partners’ technology or drug candidates 
by authorities in the various jurisdictions where such rights exist, nor can we predict with certainty which, if any, of these rights will or may be asserted 
against us by third parties. In certain cases, we have existing licenses or cross-licenses with third parties; however, the sufficiency of the scope and 
adequacy of these licenses is very uncertain in view of the long development and commercialization cycles for biotechnology and pharmaceutical products. 
There can be no assurance that we can obtain a license to any technology that we determine we need on reasonable terms, if at all, or that we could develop 
or otherwise obtain alternate technology to avoid a need to secure a license. If we are required to enter into a license with a third party, our potential 
economic benefit for the products subject to the license will be diminished. If a license is not available on commercially reasonable terms or at all, we may 
be prevented from developing and commercializing the biologic, which could significantly harm our business, results of operations, and financial 
condition.
If any of our pending patent applications do not issue, or are deemed invalid following issuance, we may lose valuable intellectual property 
protection.
The patent positions of pharmaceutical and biotechnology companies, such as ours, are uncertain and involve complex legal and factual issues. We 
own more than 150 U.S. and 700 foreign patents and have a number of pending patent applications that cover various aspects of our technologies. There 
can be no assurance that patents that have issued will be held valid and enforceable in a court of law. Even for patents that are held valid and enforceable, 
the legal process associated with obtaining such a judgment is time consuming and costly. Additionally, issued patents can be subject to opposition, inter 
partes review, re-examinations or other proceedings that can result in the revocation of the patent or maintenance of the patent in amended form (and 
potentially in a form that renders the patent without commercially relevant and/or broad coverage). Further, our competitors may be able to circumvent and 
otherwise design around our patents. Even if a patent is issued and enforceable, because development and commercialization of pharmaceutical products 
can be subject to substantial delays, patents may expire prior to the commercialization of the biologic. Moreover, even if a patent encompassing a biologic 
has not expired prior to the biologic’s commercialization, the patent may only provide a short period of protection following the commercialization of the 
covered product. In addition, our patents may be subject to post grant proceedings, such as inter partes review and re-examinations, before the U.S. Patent 
and Trademark Office (or equivalent proceedings in other jurisdictions), which could result in a loss of the patent and/or substantial cost to us.
We have filed patent applications covering our drug candidates, and we plan to file additional patent applications as we deem appropriate. There 
can be no assurance that the patent applications for which we apply will actually issue as patents, or do so with commercially relevant and/or broad 
coverage. The coverage claimed in a patent application can be significantly reduced before the patent is issued. The scope of our claim coverage can be 
critical to our ability to enter into licensing transactions with third parties and our right to receive royalties from our collaboration partnerships. Since 
publication of discoveries in scientific or patent literature often lags behind the date of such discoveries, we cannot be certain that we were the first inventor 
of inventions covered by our patents or patent applications. In addition, there is no guarantee that we will be the first to file a patent application directed to 
an invention.
An adverse outcome in any judicial proceeding involving intellectual property, including patents, could subject us to significant liabilities to third 
parties, require disputed rights to be licensed from or to third parties or require us to cease using the technology in dispute. In those instances where we 
seek an intellectual property license from another, we may not be able to obtain the license on a commercially reasonable basis, if at all, thereby raising 
concerns on our ability to freely commercialize our technologies or products.
We rely on trade secret protection and other unpatented proprietary rights for important proprietary technologies, and any loss of such rights could 
harm our business, results of operations and financial condition.
We rely on trade secret protection and other unpatented proprietary rights for our confidential and proprietary information. No assurance can be 
given that others will not independently develop substantially equivalent confidential and proprietary information or otherwise gain access to our trade 
secrets or disclose such technology, or that we can meaningfully protect our trade secrets. In addition, unpatented proprietary rights, including trade secrets 
and know-how, can be difficult to protect and may lose their value if they are independently developed by a third party or if their secrecy is lost. Any loss 
of trade secret protection or other unpatented proprietary rights could harm our business, results of operations and financial condition.
If product liability lawsuits are brought against us, we may incur substantial liabilities.
The manufacture, clinical testing, marketing and sale of medical products involve inherent product liability risks. If product liability costs exceed 
our product liability insurance coverage (or if we cannot secure product liability insurance), we may incur substantial liabilities that could have a severe 
negative impact on our financial position. Whether or not we are ultimately successful in any product liability litigation, such litigation would consume 
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and managerial resources and might result in adverse publicity, all of which would impair our business. Additionally, we may not be able to maintain our 
clinical trial insurance or product liability insurance at an acceptable cost, if at all, and this insurance may not provide adequate coverage against potential 
claims or losses.
If we or current or future collaborators or service providers fail to comply with healthcare laws and regulations, we or they could be subject to 
enforcement actions and civil or criminal penalties.
Although we do not currently have any products on the market, once we begin commercializing our drug candidates, if approved, we will be 
subject to additional healthcare statutory and regulatory requirements and enforcement by the federal and state governments of the jurisdictions in which 
we conduct our business. Healthcare providers, physicians and third-party payers play a primary role in the recommendation and prescription of any drug 
candidates for which we obtain marketing approval. Our current and future arrangements with third-party payers and customers may expose us to broadly 
applicable fraud and abuse and other healthcare laws and regulations that may constrain the business or financial arrangements and relationships through 
which we market, sell and distribute our therapeutic candidates for which we obtain marketing approval. For more information, see “Business – 
Government Regulation - Other Healthcare Laws and Regulations.”
Ensuring that our future business arrangements with third parties comply with applicable healthcare laws and regulations could involve substantial 
costs. If our operations are found to be in violation of any such requirements, we may be subject to penalties, including administrative, civil or criminal 
penalties, imprisonment, monetary damages, the curtailment or restructuring of our operations, or exclusion from participation in government contracting, 
healthcare reimbursement or other government programs, including Medicare and Medicaid, any of which could adversely affect financial results. 
Although effective compliance programs can mitigate the risk of investigation and prosecution for violations of these laws, these risks cannot be entirely 
eliminated. Any action against us for an alleged or suspected violation could cause us to incur significant legal expenses and could divert our 
management’s attention from the operation of our business, even if our defense is successful. In addition, achieving and sustaining compliance with 
applicable laws and regulations may be costly to us in terms of money, time and resources.
Healthcare legislative or regulatory reform measures may have a negative impact on our business and results of operations.
The U.S. and many foreign jurisdictions have enacted or proposed legislative and regulatory changes affecting the healthcare system. The U.S. 
government, state legislatures and foreign governments also have shown significant interest in implementing cost-containment programs to limit the growth 
of government- paid healthcare costs, including price controls, restrictions on reimbursement and requirements for substitution of generic products for 
branded prescription drugs. Governmental policy can also change the commercial potential of our product candidates, including efforts to increase patient 
access to lower-cost generic and biosimilar drugs. Additional changes that may affect our business include those governing enrollment in federal healthcare 
programs, reimbursement changes, rules regarding prescription drug benefits under the health insurance exchanges and fraud and abuse and enforcement. 
Continued implementation of the Affordable Care Act and the passage of additional laws and regulations may result in the expansion of new programs such 
as Medicare payment for performance initiatives, and may impact existing government healthcare programs, such as by improving the physician quality 
reporting system and feedback program. For more information regarding the risks related to recently enacted and future legislation please see “Business – 
Government Regulation – Legislative and Regulatory Landscape.”
We cannot predict the initiatives that may be adopted in the future. The continuing efforts of the government, insurance companies, managed care 
organizations and other payors of healthcare services to contain or reduce costs of healthcare and/or impose price controls may adversely affect: 
•
the demand for our product candidates, if we obtain regulatory approval;
•
our ability to set a price that we believe is fair for our approved products;
•
our ability to generate revenue and achieve or maintain profitability;
•
the level of taxes that we are required to pay; and
•
the availability of capital.
 
We expect that additional U.S. federal healthcare reform measures will be adopted in the future, any of which could limit the amounts that the 
U.S. federal government will pay for healthcare drugs and services, which could result in reduced demand for our drug candidates or additional pricing 
pressures. Individual states in the United States have also become increasingly active in passing legislation and implementing regulations designed to 
control pharmaceutical and biological product pricing, including price or patient reimbursement constraints, discounts, restrictions on certain drug access 
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purchasing. Legally mandated price controls on payment amounts by third-party payors or other restrictions could harm our business, financial condition, 
results of operations and prospects. In addition, regional healthcare authorities and individual hospitals are increasingly using bidding procedures to 
determine what pharmaceutical products and which suppliers will be included in their prescription drug and other healthcare programs. This could reduce 
the ultimate demand for our drugs or put pressure on our drug pricing, which could negatively affect our business, financial condition, results of operations 
and prospects.
Disruptions to the normal functioning of the FDA and other government agencies could hinder their ability to perform and carry out important 
roles and activities on which the operation of our business relies, which could negatively impact our business.
The ability of the FDA to review and approve new products can be affected by a variety of factors, including government budget and funding 
levels, ability to hire and retain key personnel and accept the payment of user fees, and statutory, regulatory, and policy changes. In particular, actions by 
the Trump administration to limit U.S. federal agency budgets or personnel may result in reductions to the FDA’s budget, employee and operations, which 
may lead to disruptions, slower response times and longer review periods (notwithstanding Fast Track designation), potentially affecting our ability to 
progress development of our drug candidates. In the past, average review times at the agency have fluctuated, and this may continue in the future. In 
addition, government funding of other agencies on which our operations may rely is subject to the political process, which is inherently fluid and 
unpredictable.
In addition, government shutdowns, if prolonged, could significantly impact the ability of government agencies upon which we rely (such as the 
FDA and SEC) to timely review and process our regulatory submissions, which could have a material adverse effect on our business. Disruptions at the 
FDA and other agencies may slow the time necessary for new product candidates to be reviewed and/or approved by necessary government agencies, 
which would adversely affect our business. If a prolonged government shutdown occurs, it could significantly impact the ability of the FDA to timely 
review and process our regulatory submissions, which could have a material adverse effect on our business. Further, future government shutdowns could 
impact our ability to access the public markets and obtain necessary capital in order to properly capitalize and continue our operations.
We are involved in legal proceedings and may incur substantial litigation costs and liabilities that will adversely affect our business, financial 
condition and results of operations.
From time to time, we are involved in legal proceedings where we or other third parties are enforcing or seeking intellectual property rights, 
invalidating or limiting patent rights that have already been allowed or issued, or otherwise asserting proprietary rights through one or more potential legal 
remedies. Third parties have asserted, and may in the future assert, that we or our partners infringe their proprietary rights, such as patents and trade secrets, 
or have otherwise breached our obligations to them. A third party often bases its assertions on a claim that its patents cover the technology we use or our 
drug candidates or that we have misappropriated its confidential or proprietary information. Similar assertions of infringement could be based on future 
patents that may issue to third parties. In certain of our agreements with our partners, we are obligated to indemnify and hold harmless our collaboration 
partners from intellectual property infringement, product liability and certain other claims, which could cause us to incur substantial costs and liability if we 
are called upon to defend ourselves and our partners against any claims. We are also regularly involved in opposition proceedings at the European Patent 
Office and in inter partes review and re-examination proceedings at the U.S. Patent and Trademark Office where third parties seek to invalidate or limit the 
scope of our allowed patent applications or issued patents covering (among other things) our drug candidates and technologies. If a third party obtains 
injunctive or other equitable relief against us or our partners, they could effectively prevent us, or our partners, from developing or commercializing, or 
deriving revenue from, certain drugs or drug candidates in the U.S. and abroad. Costs associated with litigation, substantial damage claims, indemnification 
claims or royalties paid for licenses from third parties could have a material adverse effect on our business, financial condition and results of operations.
From time to time, we may also be involved in legal proceedings other than those related to intellectual property, including securities actions or 
derivative actions or other complaints.
On August 7, 2023, we filed a complaint in the United States District Court for the Northern District of California (the Court) against Lilly 
alleging, among other claims, breach of contract and breach of implied covenant of good faith and fair dealing (the Complaint), in connection with our 
collaboration with Lilly. Following the denial of its motion to dismiss the Complaint entirely, Lilly filed an answer that included counterclaims against us 
alleging breach of specified confidentiality provisions and defamation. The case is proceeding.
The cost to us in initiating or defending any litigation or other proceeding, even if resolved in our favor, could be substantial, and litigation would 
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continuation of patent litigation or other proceedings could delay our research and development efforts or result in financial implications either in terms of 
seeking license arrangements or payment of damages or royalties. There is no guarantee that our insurance coverage for damages resulting from any 
litigation or the settlement would be sufficient and could result in substantial financial risk to the Company.
Given the nature of lawsuits and complaints, we cannot reasonably estimate a potential future loss or a range of potential future losses for any of 
the legal proceedings we may be involved in. However, an unfavorable resolution could potentially have a material adverse effect on our business, financial 
condition, and results of operations or prospects, and potentially result in paying monetary damages. We have recorded no liability for any litigation 
matters in our Consolidated Balance Sheets at December 31, 2024.
If we are found in violation of privacy and data protection laws, we may be required to pay penalties, be subjected to scrutiny by regulators or 
governmental entities, or be suspended from participation in government healthcare programs, which may adversely affect our business, financial 
condition and results of operations.
Our business is subject to many laws and regulations intended to protect the privacy rights of individuals participating in our clinical trials and our 
employees, among others. For example, with regard to individuals participating in our clinical trials, various laws and regulations govern the safeguarding 
the privacy, integrity, availability, security and transmission of individually identifiable health information. In addition to federal laws and regulations in 
the United States, such as the HIPAA requirements relating to the privacy, security and transmission of individually identifiable health information, many 
state and foreign laws also govern the privacy and security of health information. These laws often differ from each other in significant ways, thus 
complicating compliance efforts. The global data protection landscape is rapidly evolving, and implementation standards and enforcement practices are 
likely to remain uncertain for the foreseeable future.
The California Consumer Privacy Act (CCPA) grants California residents expanded rights to access and delete their personal information, limit 
the sharing, use and disclosure of personal information, and receive detailed information about how their personal information is used. The CCPA provides 
for civil penalties for violations, as well as a private right of action for certain data breaches that may increase the risk of data breach litigation. The CCPA 
has increased our compliance costs and may expose us to additional liability. Similarly comprehensive privacy laws have become effective in more than a 
dozen other U.S. states, including, for example, Colorado, Connecticut, New Jersey, New Hampshire, Utah and Virginia, with several more expected to 
pass in the coming year. Like the CCPA, these laws grant consumers rights in relation to their personal information and impose new privacy and data 
security obligations on regulated businesses but contain key differences, including in their scope and application. In addition, certain states have passed or 
proposed laws to specifically regulate health information. For example, Washington’s My Health My Data Act, which came into force in March 2024, 
requires regulated entities to obtain consent to collect health information, grants consumers certain rights, including to request deletion, and provides for 
robust enforcement mechanisms, including enforcement by the Washington state attorney-general and a private right of action for consumer claims. At the 
federal level, the FTC has used its authority over “unfair or deceptive acts or practices” to impose stringent requirements on the collection and disclosure of 
sensitive categories of personal information, including health information, which may increase our potential liability and compliance costs and adversely 
affect our business.
The European Regulation 2016/679, known as the General Data Protection Regulation (EU GDPR), the implementing legislation of EU Member 
States, which became effective on May 25, 2018, and the EU GDPR as incorporated into the laws of the United Kingdom (UK GDPR) (together with the 
EU GDPR, the GDPR) apply to the collection and processing of personal data, including health-related information, by companies located in the EU and 
UK, or in certain circumstances, by companies located outside of the EU or UK and processing personal information of individuals located in the EU or 
UK. The GDPR is wide-ranging in scope and imposes strict obligations on the ability to process personal data, including health-related information, in 
particular in relation to their collection, use, disclosure and transfer. These include several requirements relating to, for example, (i) ensuring a legal basis 
or condition applies to the processing of personal data and, in some situations where required, obtaining the consent of the individuals to whom the 
personal data relates, (ii) the information provided to the individuals about how their personal information is used, (iii) responding to data subject requests, 
(iv) imposing requirements to notify the competent national data protection authorities and data subjects of personal data breaches, (v) implementing 
safeguards in connection with the security and confidentiality of the personal data, (vi) accountability requirements and (vii) taking certain measures when 
engaging third-party processors. The GDPR prohibits the transfer of personal data to countries outside of the European Economic Area (EEA) and UK, 
such as the United States, which are not considered by the European Commission to provide an adequate level of data protection. Potential pecuniary fines 
for noncompliant companies may be up to the greater of €20 million or 4% of annual global revenue.
Regulators and legislators in the U.S. are increasingly scrutinizing and restricting certain personal data transfers and transactions involving foreign 
countries. For example, Executive Order 14117, Preventing Access to Americans’ Bulk Sensitive Personal Data and United States Government-Related 
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Department of Justice rule dated December 27, 2024, prohibits data brokerage transactions involving certain sensitive personal data categories, including 
health data, genetic data, and biospecimens, to countries of concern, including China. The regulations also restrict certain investment agreements, 
employment agreements and vendor agreements involving such data and countries of concern, absent specified cybersecurity controls. Actual or alleged 
violations of these regulations may be punishable by criminal and/or civil sanctions, and may result in exclusion from participation in federal and state 
programs.
Any actual or alleged failure to comply with data protection law, including with respect to information relating to our employees and/or clinical 
patients, could result in reputational harm, monetary fines (such as those imposed by the GDPR and CCPA), civil suits, civil penalties or criminal sanctions 
and requirements to disclose the breach, and the development of our drug candidates could be delayed. In addition, we continue to be subject to new and 
evolving data protection laws and regulations from a variety of jurisdictions, and there is a risk that our systems and processes for managing and protecting 
data may be found to be inadequate, which could materially adversely affect our business, financial condition and results of operations.
Like many companies, we may use artificial intelligence (AI) technologies, including generative AI, to efficiently grow and manage our business. 
These technologies have increasingly been the focus of attention for lawmakers and regulators around the globe.
The use of new and evolving technologies, such as AI, may present risks and challenges that can impact our business, including by posing security 
and other risks to our confidential information and proprietary information. As a result, we may be exposed to reputational harm and liability.
The use of certain AI technology can give rise to intellectual property risks, including compromises to proprietary intellectual property and 
intellectual property infringement. Additionally, we expect to see increasing regulation related to AI use and ethics, which may also significantly increase 
the burden and cost of research, development and compliance in this area. For example, the EU’s Artificial Intelligence Act (AI Act) entered into force on 
August 1, 2024, with most provisions becoming effective on August 2, 2026. This sweeping legislation, with broad extraterritorial reach, imposes 
significant obligations on providers and deployers of artificial intelligence systems and encourages ethical principles in the development and use of these 
systems. If we develop or deploy AI systems that are governed by the AI Act, we may be required to adopt higher standards of data quality, transparency 
and human oversight, and adhere to specific and potentially burdensome and costly ethical, accountability and administrative requirements. 
Likewise, in the U.S., several states, including Colorado and California, passed laws that will take effect in 2026 to regulate various uses of 
artificial intelligence, including to make consequential decisions. In addition, various federal regulators have issued guidance and focused enforcement 
efforts on the use of AI in regulated sectors. The FDA, for example, issued guidance on the use of artificial intelligence in medical devices, requiring 
detailed risk management and review processes to obtain approvals. If we develop or use AI systems governed by these laws or regulations, we will need to 
meet higher standards of data quality, transparency, monitoring and human oversight, and we would need to adhere to specific and potentially burdensome 
and costly ethical, accountability, and administrative requirements, with the potential for significant enforcement or litigation in the event of any perceived 
non-compliance.
The rapid evolution of AI will require the application of significant resources to help ensure that AI is implemented in accordance with applicable 
law and regulation and in a socially responsible manner and to minimize any real or perceived harmful impacts. Our vendors may in turn incorporate AI 
tools into their own offerings, and the providers of these AI tools may not meet existing or rapidly evolving regulatory or industry standards, including with 
respect to privacy and data security. Further, bad actors around the world use increasingly sophisticated methods, including AI, to engage in illegal 
activities such as the theft and misuse of personal or proprietary information. Any of these effects could damage our reputation, result in the loss of 
valuable property and information, cause us to breach applicable laws and regulations, and adversely impact our business.
Our operations may involve hazardous materials and are subject to environmental, health, and safety laws and regulations. Compliance with these 
laws and regulations is costly, and we may incur substantial liability arising from our activities involving the use of hazardous materials.
As a research-based biopharmaceutical company with significant research and development operations, we are subject to extensive environmental, 
health, and safety laws and regulations, including those governing the use of hazardous materials. Our research and development activities involve the 
controlled use of chemicals, radioactive compounds, and other hazardous materials. The cost of compliance with environmental, health, and safety 
regulations (including, but not limited to, the handling and disposal of both our hazardous and non-hazardous waste) is substantial. If an accident involving 
these materials or an environmental discharge were to occur, we could be held liable for any resulting damages, or face regulatory actions, which could 
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Risks Related to Investment and Securities
The price of our common stock has, and may continue to fluctuate significantly, which could result in substantial losses for investors and 
securities class action and shareholder derivative litigation.
Our stock price is volatile. During the year ended December 31, 2024, based on closing prices on the NASDAQ Capital Market, the closing price 
of our common stock ranged from $0.49 to $1.83 per share. In response to volatility in the price of our common stock in the past, plaintiffs’ securities 
litigation firms have sought information from us and/or shareholders as part of their investigation into alleged securities violations and breaches of duties 
(among other corporate misconduct allegations). Following their investigations, plaintiffs’ securities litigation firms have often initiated legal action, 
including the filing of class action lawsuits, derivative lawsuits, and other forms of redress. We expect our stock price to remain volatile and we continue to 
expect the initiation of legal actions by plaintiffs’ securities litigation firms following share price fluctuations. A variety of factors may have a significant 
effect on the market price of our common stock, including the risks described in this section titled “Risk Factors” and the following:
•
announcement of our 2022 Restructuring Plan and 2023 Restructuring Plan;
•
announcements of data from, or material developments in, our clinical studies and those of our collaboration partners, including data 
regarding efficacy and safety, delays in clinical development, regulatory approval or commercial launch – in particular, the results from 
clinical studies of bempegaldesleukin and rezpegaldesleukin have had a significant impact on our stock price;
•
the timing of outcomes from our clinical trials which can be difficult to predict particularly for clinical studies that have event-driven end 
points such as progression-free survival and overall survival;
•
announcements by collaboration partners as to their plans or expectations related to drug candidates and approved biologics in which we 
have a substantial economic interest;
•
announcements regarding terminations or disputes under our collaboration agreements;
•
fluctuations in our results of operations;
•
developments in patent or other proprietary rights, including intellectual property litigation or entering into intellectual property license 
agreements and the costs associated with those arrangements;
•
announcements of technological innovations or new therapeutic products that may compete with our approved partnered products or 
products under development;
•
announcements of changes in governmental regulation affecting us or our competitors;
•
litigation brought against us or third parties to whom we have indemnification obligations;
•
public concern as to the safety of drug formulations developed by us or others;
•
our financing needs and activities; and
•
general economic, industry and market conditions, including the impacts of rising inflation and interest rates and global geopolitical 
tensions.
At times, our stock price has been volatile even in the absence of significant news or developments. The stock prices of biotechnology companies 
and securities markets generally have been subject to dramatic price swings in recent years. In addition, as a result of our lower stock price, we are no 
longer a well-known seasoned issuer, which otherwise would allow us to, among other things, file automatically effective shelf registration statements. As 
a result, any attempt to access the public capital markets will be more expensive and subject to delays. Additionally, if our common stock does not maintain 
a closing bid price of $1.00 per share in order to comply with the continued listing standards of the Nasdaq Capital Market, our common stock may become 
delisted, which could adversely affect our stock price, the flexibility of our investors to sell our common stock in the secondary market, and our ability to 
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We have implemented certain anti-takeover measures, which make it more difficult to acquire us, even though such acquisitions may be beneficial 
to our stockholders.
Provisions of our certificate of incorporation and bylaws, as well as provisions of Delaware law, could make it more difficult for a third party to 
acquire us, even though such acquisitions may be beneficial to our stockholders. These anti-takeover provisions include:
•
establishment of a classified board of directors such that not all members of the board may be elected at one time;
•
lack of a provision for cumulative voting in the election of directors, which would otherwise allow less than a majority of stockholders to 
elect director candidates;
•
the ability of our board to authorize the issuance of “blank check” preferred stock to increase the number of outstanding shares and thwart 
a takeover attempt;
•
prohibition on stockholder action by written consent, thereby requiring all stockholder actions to be taken at a meeting of stockholders;
•
establishment of advance notice requirements for nominations for election to the board of directors or for proposing matters that can be 
acted upon by stockholders at stockholder meetings; and
•
limitations on who may call a special meeting of stockholders.
Further, provisions of Delaware law relating to business combinations with interested stockholders may discourage, delay or prevent a third party 
from acquiring us. These provisions may also discourage, delay or prevent a third party from acquiring a large portion of our securities or initiating a tender 
offer or proxy contest, even if our stockholders might receive a premium for their shares in the acquisition over the then-current market prices. We also 
have a change of control severance benefit plan, which provides for certain cash severance, stock award acceleration and other benefits in the event our 
employees are terminated (or, in some cases, resign for specified reasons) following an acquisition. This severance plan could discourage a third party from 
acquiring us.
General Risk Factors
We significantly rely on information technology systems and infrastructure, and any failure, inadequacy, damage, interruption, compromise or 
breach, or security lapse of that technology within our internal computer systems and infrastructure, or those of our partners, vendors, CROs, 
CMOs or other contractors or consultants, may result in a material disruption of our development programs and our operations and financial 
condition.
As part of our business, we collect, store and transmit large amounts of confidential information, proprietary or other sensitive information, 
including intellectual property and personal data. Despite the implementation of security measures, our internal computer systems and infrastructure or 
those of our partners, vendors, contract research organizations (CROs), contract manufacturing organizations (CMOs) and other contractors and consultants 
are vulnerable to loss, damage, compromise, interruption, denial-of-service, unauthorized access, or misappropriation. 
Cybersecurity incidents and data breaches have been increasing in frequency, levels of persistence, sophistication and intensity, and can include 
unauthorized activity by our employees, contractors and other third parties, as well as by third parties who use cyberattack techniques involving malware, 
ransomware, hacking and social engineering fraud (including phishing attacks) and business email compromises), among others. Additionally, the risk of 
data breaches, cybersecurity incidents, cyber-attacks or other security events may be heightened as a result of new technologies, including artificial 
intelligence, and an increase in the number of employees who adopted a remote working environment, which may be less secure and more susceptible to 
hacking attacks or other security compromises or breaches. Our information technology systems and infrastructure, and those of our partners, vendors, 
CROs, CMOs or other contractors or consultants are also vulnerable to intentional or inadvertent wrongful conduct by employees and vendors, natural 
disasters, terrorism, war, telecommunication and electrical failures and the types of interruption, compromise and damage described above. Any such 
compromise or disruption, no matter the origin, may cause an interruption of our operations. For instance, the loss or misappropriation of preclinical data or 
data from any clinical trial involving our drug candidates could result in delays in our development and regulatory filing efforts and significantly increase 
our costs. In addition, the loss, corruption or unauthorized disclosure or misuse of our trade secrets, personal data or other confidential and/or proprietary or 
sensitive information could compromise the commercial viability of one or more of our programs, which would negatively affect our business. Also, the 
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applicable legal obligations, including breach notification obligations to individuals, regulators, partners and others, could be significant and our reputation 
could be materially damaged. We could also be exposed to litigation or regulatory investigations or actions by state and federal governmental authorities 
and non-U.S. authorities, including fines, penalties, and other legal and financial exposure and liabilities.  Our contracts may not contain limitations of 
liability, and even where they do, there can be no assurance that limitations of liability in our contracts are sufficient to protect us from liabilities, damages, 
or claims related to our privacy and data security obligations.
Changes in tax law could adversely affect our business and financial condition.
Our business is subject to numerous international, federal, state, and other governmental laws, rules, and regulations that may adversely affect our 
operating results, including, taxation and tax policy changes, tax rate changes, new tax laws, or revised tax law interpretations, which individually or in 
combination may cause our effective tax rate to increase. In the U.S., the rules dealing with federal, state, and local income taxation are constantly under 
review by persons involved in the legislative process and by the Internal Revenue Service and the U.S. Treasury Department. Changes to tax laws (which 
changes may have retroactive application) could adversely affect us or holders of our common stock. In recent years, such changes have been made and 
changes are likely to continue to occur in the future. Future changes in tax laws could have a material adverse effect on our business, cash flow, financial 
condition or results of operations.
Global economic and political conditions may negatively affect us and may magnify certain risks that affect our business.
Our operations and performance may be affected by global economic and political conditions. For example, our operations and performance (or 
the operations and performance of our partners and service providers) may be negatively affected by political or civil unrest or military action, terrorist 
activity, and unstable governments and legal systems. For example, in late February 2022, Russia commenced a military invasion of Ukraine, and the 
sustained conflict in Ukraine, including the potential effects of sanctions and retaliatory cyber-attacks on the world economy and markets, has contributed 
to increased market volatility and uncertainty. In particular, sanctions imposed by the U.S., EU and other countries in response to the conflict between 
Russia and Ukraine and the potential response to such sanctions may have an adverse impact on our business, including our clinical trials, the financial 
markets and the global economy. In addition, in October 2023, conflicts arose in Israel and Gaza following terrorist attacks in Israel. As the conflicts 
between Ukraine and Russia and escalating conflicts in the Middle East continue, further sanctions, retaliatory attacks, market volatility and uncertainty 
may occur, any of which could have a material adverse effect on our business.
As a result of global economic and political conditions, some third-party payers may delay or be unable to satisfy their reimbursement obligations. 
Job losses or other economic hardships may also affect patients’ ability to afford healthcare as a result of increased co-pay or deductible obligations, greater 
cost sensitivity to existing co-pay or deductible obligations, lost healthcare insurance coverage or for other reasons. Our ability to conduct clinical trials in 
regions experiencing political or civil unrest could negatively affect clinical trial enrollment or the timely completion of a clinical trial. We believe the 
aforementioned economic conditions have led and could continue to lead to reduced demand for our and our collaboration partners’ drug products, which 
could have a material adverse effect on our product sales, business and results of operations.
Further, with rising international trade tensions or sanctions, our business may be adversely affected following new or increased tariffs that result 
in increased global clinical trial costs as a result of international transportation of clinical drug supplies, as well as the costs of materials and products 
imported into the U.S. Tariffs, trade restrictions or sanctions imposed by the U.S. or other countries could increase the prices of our and our collaboration 
partners’ drug products, affect our and our collaboration partners’ ability to commercialize such drug products, or create adverse tax consequences in the 
U.S. or other countries. As a result, changes in international trade policy, changes in trade agreements and the imposition of tariffs or sanctions by the U.S. 
or other countries could materially adversely affect our results of operations and financial condition.
Given that policy impacts from U.S. elections in November 2024 have not yet been determined, the future geopolitical landscape remains 
uncertain. Any resulting changes in international trade relations, legislation and regulations, including those related to taxation and importation, or 
economic and monetary policies, or heightened diplomatic tensions or political and civil unrest, among other potential impacts, could adversely impact the 
global economy and our operating results.
Our business could be negatively impacted by corporate citizenship and sustainability matters.
There is an increased focus from certain investors, employees, and other stakeholders concerning corporate citizenship and sustainability matters, 
which include environmental concerns and social investments. We could fail to meet, or be perceived to fail to meet, the expectations of these certain 
investors, employees and other stakeholders concerning corporate citizenship and sustainability matters, thereby resulting in a negative impact to our 
business.

 
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If natural disasters or other catastrophic events strike, our business may be harmed.
Our corporate headquarters, where the majority of our research and development operations employees are based, are located in the San Francisco 
Bay Area, a region known for seismic activity and a potential terrorist target. In the event of an earthquake or other natural disaster, catastrophic event 
caused by climate change, political instability, civil unrest, or terrorist event in the region, our business operations would be significantly disrupted and our 
financial condition would be harmed. Our collaboration partners and important vendors and suppliers to us or our collaboration partners may also be 
subject to catastrophic events, such as earthquakes, floods, wildfires, hurricanes, tornadoes and pandemics any of which could harm our business 
(including, for example, by disrupting supply chains important to the success of our business), results of operations and financial condition. We have not 
undertaken a systematic analysis of the potential consequences to our business, results of operations and financial condition from a major earthquake or 
other catastrophic event, such as a fire, sustained loss of power, terrorist activity or other disaster, and do not have a recovery plan for such disasters. In 
addition, our insurance coverage may not be sufficient to compensate us for actual losses from any interruption of our business that may occur.
Item 1B. Unresolved Staff Comments
None.
Item 1C. Cybersecurity.
Cyber Risk Management and Strategy 
The Company, under the oversight of the audit committee of the board of directors, has implemented and maintains an enterprise risk management 
process, which includes periodic assessments of various risk categories, including cyber risks, across the Company.  Our process for assessing, identifying, 
and managing risks from cybersecurity threats is informed by industry standards and supported by cybersecurity technologies, including third-party 
security solutions, monitoring, and alerting tools, designed to monitor, identify, and address cybersecurity risks.  
 We leverage a managed security service provider and also engage with other third-party providers and consultants to support our cyber risk 
management efforts, including through periodic security testing. We have a process to assess and review the cybersecurity practices of information 
technology third-party vendors and service providers, including through review of applicable certifications, security reports, and vendor questionnaires and 
contractual requirements, as appropriate.
Governance Related to Cybersecurity Risks
Our cyber risk management program and related operations and processes are directed by the Head of IT in consultation with the legal team and 
our third-party security advisor. Currently, the Head of IT role is held by an individual who has over 20 years of information technology experience. The 
Head of IT reports to the Chief Legal Officer.
The Head of IT meets with the Chief Legal Officer periodically to discuss and review our cybersecurity risk management processes and to address 
matters related to potential cybersecurity and information technology risks, with input from the Company’s third-party technology providers, as 
appropriate.  In addition, the Head of IT has regular meetings with our managed security service provider to inform our cyber risk management processes 
and reporting to management.  The Head of IT, working with the Chief Legal Officer, provides periodic reports on cybersecurity and information 
technology matters to the audit committee, which is responsible for reviewing and overseeing the Company’s risk management process, including 
cybersecurity risks.
The Chief Legal Officer and the audit committee periodically report on cybersecurity risk management to the full board of directors. The board of 
directors, as a whole and through its committees, has responsibility for the periodic review and oversight of information technology risks, including 
cybersecurity risks.
Our enterprise risk management program is overseen by a risk management committee comprised of senior managers across key functional areas 
that cover cybersecurity and information technology matters. This committee provides periodic reports and updates, as needed, to the board of directors or 
one of its designated committees. In collecting information on enterprise risk, cybersecurity is included as a designated risk category, and the results of our 
enterprise risk assessment processes, including risks related to cybersecurity, are also discussed with the audit committee and among senior management on 
a periodic basis.
We have not identified any cybersecurity incidents or threats that have materially affected us or are reasonably likely to materially affect us, 
including our business strategy, results of operations, or financial condition.  For more information regarding cybersecurity risks that may affect or 
Company, see “Item 1A. Risk Factors” included in this Report.

 
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Item 2. Properties
California
We lease a 155,215 square foot facility in the Mission Bay Area of San Francisco, California (Mission Bay Facility), under an operating lease 
which expires in January 2030. The Mission Bay Facility is our corporate headquarters. We also lease 135,936 square feet of office space in San Francisco 
(the Third Street Facility), under an operating lease which expires in January 2030.
In connection with our 2022 and 2023 Restructuring Plans, we have consolidated our San Francisco operations in our Mission Bay Facility, and 
we have vacated our Third Street Facility and certain laboratory and office spaces at our Mission Bay Facility. We have sublet approximately 29,000 
square feet of office and laboratory space in our Mission Bay Facility and are seeking to sublease all of the remaining spaces in both Facilities.
Alabama
We previously owned facilities consisting of approximately 124,000 square feet in Huntsville, Alabama, which housed laboratories as well as 
administrative, clinical and commercial manufacturing facilities for our PEGylation and advanced polymer conjugate technology operations as well as 
manufacturing of APIs for early clinical studies. These facilities were sold to Gannet BioChem, an affiliate of Ampersand Management LLC d/b/a 
Ampersand Capital Partners (Ampersand) via the Asset Purchase Agreement (the APA) on December 2, 2024.
Item 3. Legal Proceedings
From time to time, we are subject to legal proceedings. We are not currently a party to or aware of any proceedings that we believe will have, 
individually or in the aggregate, a material adverse effect on our business, financial condition or results of operations.
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
Our common stock trades on The NASDAQ Capital Market under the symbol “NKTR.”
Holders of Record
As of March 6, 2025, there were approximately 143 holders of record of our common stock. 
Dividend Policy
We have never declared or paid any cash dividends on our common stock. We currently expect to retain any future earnings for use in the 
operation and expansion of our business and do not anticipate paying any cash dividends on our common stock in the foreseeable future.
There were no sales of unregistered securities and there were no common stock repurchases made during the year ended December 31, 2024, other 
than the issuance of the pre-funded warrant to TCG Crossover Fund II, L.P. (TCG) and the repurchase of the shares issued to Bristol Myers Squibb 
Company (BMS) as disclosed in Notes 6 and 9, respectively, to our Consolidated Financial Statements and summarized in the following table:
Issuer Purchases of Equity Securities
 
 
 
Period
 
(a) Total number of shares of 
common stock purchased
 
(b) Approximate average share price 
paid per share of common stock
 
(c) total number of shares 
purchased as part of publicly 
announced plans or programs
(d) Maximum number (or 
approximate dollar value) of 
shares that may yet be 
purchased under the plans or 
program
February 2024
8,284,600
$0.36212
8,264,600
$3,000,000
Total
8,284,600
$0.36212
8,264,600
$3,000,000
1.  As announced on February 16, 2024, Nektar entered into a privately negotiated stock repurchase agreement with BMS pursuant 
to which, among other things, Nektar purchased from BMS 8,284,600 restricted shares of Nektar common stock for an aggregate 
purchase price of $3,000,000. This repurchase was a standalone transaction that we completed on February 12, 2024.
 
Securities Authorized for Issuance Under Equity Compensation Plans
Information regarding our equity compensation plans as of December 31, 2024 is disclosed in Item 12 “Security Ownership of Certain Beneficial 
Owners and Management and Related Stockholder Matters” of this Annual Report on Form 10-K.
Performance Measurement Comparison
The material in this section is being furnished and shall not be deemed “filed” with the SEC for purposes of Section 18 of the Exchange Act or 
otherwise subject to the liability of that section, nor shall the material in this section be deemed to be incorporated by reference in any registration statement 
or other document filed with the SEC under the Securities Act or the Exchange Act, except as otherwise expressly stated in such filing.
The following graph compares, for the five year period ended December 31, 2024, the cumulative total stockholder return (change in stock price 
plus reinvested dividends) of our common stock with (i) the NASDAQ Composite Index, (ii) the NASDAQ Biotechnology Index and (iii) the RDG 
SmallCap Biotechnology Index. Measurement points are the last trading day of each of our fiscal years ended December 31, 2020, December 31, 2021, 
December 31, 2022, December 31, 2023 and December 31, 2024. The graph assumes that $100 was invested on December 31, 2019 in the common stock 
of the Company, the NASDAQ Composite Index, the NASDAQ Biotechnology Index and the RDG SmallCap Biotechnology Index and assumes 
reinvestment of any dividends. The stock price performance in the graph is not intended to forecast or indicate future stock price performance.
1

 
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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
The following discussion contains forward-looking statements that involve risks and uncertainties. Our actual results could differ materially from 
those discussed here. Factors that could cause or contribute to such differences include, but are not limited to, those discussed in this section as well as 
factors described in “Part I, Item 1A — Risk Factors.”
Overview
Strategic Direction of Our Business
Nektar Therapeutics is a clinical stage, research-based drug discovery biopharmaceutical company focused on discovering and developing 
innovative medicines in the field of immunotherapy. Within this growing field, we direct our efforts toward creating new immunomodulatory agents that 
selectively induce, amplify, attenuate or prevent immune responses in order to achieve desired therapeutic outcomes. We apply our deep understanding of 
immunology to identify and create innovative drug candidates and use our drug development expertise to advance these molecules through preclinical and 
clinical development. Our pipeline of clinical-stage and preclinical-stage immunomodulatory agents targets the treatment of autoimmune diseases (e.g. 
rezpegaldesleukin and NKTR-0165, respectively) and cancer (e.g. NKTR-255). We continue to make significant investments in building and advancing our 
pipeline of drug candidates as we believe that this is the best strategy to build long-term shareholder value.
In December 2024, we completed the sale of our manufacturing facility in Huntsville, Alabama (the Facility), and assigned our manufacturing and 
supply agreements to Gannet BioChem, an affiliate of Ampersand Management LLC d/b/a Ampersand Capital Partners for consideration of $64.7 million 
in cash, net of transaction costs, and an approximate 20% equity interest at the time of close in Gannet BioChem (the Transactions). See Note 12 to our 
Consolidated Financial Statements for additional information.
In April of 2022 and 2023, we implemented the 2022 Restructuring Plan and 2023 Restructuring Plan, respectively, which both prioritized key 
research and development efforts that will be most impactful to the Company’s future. Central to both plans is the continuation of clinical development of 
both rezpegaldesleukin (previously referred to as NKTR-358) and NKTR-255 programs as well as our core research programs in immunology that include 
a separate tumor necrosis factor receptor 2 agonist antibody (NKTR-0165).
Autoimmune and inflammatory diseases cause the immune system to mistakenly attack and damage healthy cells in a person’s body. A failure of 
the body’s self-tolerance mechanisms enables the formation of the pathogenic T lymphocytes that conduct this attack. Our drug candidate 
rezpegaldesleukin is a potential first-in-class resolution therapeutic that may address this underlying immune system imbalance in people with autoimmune 
disorders and inflammatory diseases. It is designed to target the interleukin-2 (IL-2) receptor complex in the body in order to stimulate proliferation of 
powerful inhibitory immune cells known as regulatory T cells (Treg cells). By activating these cells, rezpegaldesleukin may act to bring the immune 
system back into balance. Rezpegaldesleukin is being developed as a once or twice monthly self-administered injection for a number of autoimmune 
disorders and inflammatory diseases.
On October 13, 2023, we announced final efficacy data from a Phase 1b study of rezpegaldesleukin in adult patients with atopic dermatitis (Phase 
1b AD Study) at the European Academy of Dermatology and Venereolgy conference. The final efficacy data from the Phase 1b AD study showed that 
patients with moderate-to-severe atopic dermatitis that were treated with rezpegaldesluekin had dose-dependent improvements in the eczema area and 
severity index (EASI), validated investigated global assessment (vIGA), body surface area (BSA), and itch numeric rating scale (NRS) over twelve weeks 
of treatment compared to placebo, which were sustained post-treatment over an additional thirty-six weeks. Rezpegaldesleukin was well tolerated with no 
patients in the rezpegaldesleukin groups experiencing severe, serious, or fatal adverse events, and no anti-rezpegaldesleukin antibodies were detected.
In late October 2023, we initiated a Phase 2b clinical study of rezpegaldesleukin in patients with moderate-to-severe atopic dermatitis, which 
remains on track for a topline data readout in the first half of 2025. In March 2024, we initiated a Phase 2b clinical study in patients with severe-to-very 
severe alopecia areata, which remains on track for a topline data readout in the second half of 2025.  We also plan to explore other autoimmune indications 
for the development of rezpegaldesleukin. On February 11, 2025, we announced that the FDA had granted Fast Track designation for rezpegaldesleukin for 
the treatment of adult and pediatric patients 12 years of age and older with moderate-to-severe atopic dermatitis whose disease is not adequately controlled 
with topical prescription therapies or when those therapies are not advisable.
In oncology, we focus on developing medicines that target biological pathways that stimulate and sustain the body’s immune response in order to 
fight cancer. Our drug candidate NKTR-255 is an investigational biologic that is designed to target the IL-15 pathway in order to activate the body’s innate 
and adaptive immunity. Through optimal engagement of the IL-15 receptor complex, NKTR-255 is designed to enhance functional NK cell populations 
and formation of long-term 

 
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immunological memory, which may lead to sustained and durable anti-tumor immune response. We are continuing select developmental studies of NKTR-
255 in combination with cell therapies and checkpoint inhibitors while we evaluate additional strategic partnership pathways for the program. 
In December 2024, we announced the results of our Phase 2 proof-of-concept study to evaluate NKTR-255 following Yescarta® or Breyanzi®  
CD19 CAR-T cell therapy in patients with large B-cell lymphoma at the 66th ASH Annual Meeting and Exposition in San Diego, California. In the fifteen-
person clinical trial, the NKTR-255 combined treatment group demonstrated an improved complete response rate (CRR) at six months, achieving 73% 
compared to 50% for the placebo, as assessed by a blinded independent central radiology review. Additionally, two patients treated with NKTR-255 
converted from stable disease or partial response to complete responses at six months. No conversions from stable disease or partial response to complete 
response were observed in the placebo arm of the trial. The Fred Hutchinson Cancer Center is evaluating NKTR-255 following Breyanzi® CD19 CAR-T 
cell therapy in patients with relapsed/refractory large B-cell lymphoma as an investigator sponsored study. We are continuing our oncology clinical 
collaboration with Merck KGaA to evaluate the maintenance regimen of NKTR-255 in combination with avelumab, a PD-L1 inhibitor, in patients with 
locally advanced or metastatic urothelial carcinoma in the Phase II JAVELIN Bladder Medley study. We expect to receive topline data from this study in 
the first half of 2025. We entered into a new clinical study collaboration with AbelZeta Pharma, Inc. (AbelZeta) (formerly known as CBMG Holdings) to 
study NKTR-255 in combination with its C-TIL051, a tumor-infiltrating lymphocyte (TIL) therapy, in advanced non-small cell lung cancer (NSCLC) 
patients that are relapsed or refractory to anti-PD-1 therapy. Under the collaboration, we will contribute NKTR-255 and AbelZeta will add NKTR-255 to its 
ongoing AbelZeta-sponsored Phase 1 clinical trial. We also have an ongoing investigator sponsored study evaluating NKTR-255 in combination with 
IMFINZI (durvalumab) in patients with unresectable Stage 3 NSCLC who have received chemoradiation. 
We continue to advance our most promising research drug candidates into preclinical development with the objective of advancing these early-
stage research programs to human clinical studies over the next several years. Our lead research program, NKTR-0165, is our preclinical tumor necrosis 
factor (TNF) receptor type II (TNFR2) agonist asset, which we believe is a unique bivalent antibody that selectively stimulates TNFR2 receptor activity, 
without modulation of the TNFR1 signaling. TNFR2 signaling drives immunoregulatory function and can provide a direct protective effect for tissue cells. 
TNFR2 is highly expressed on Tregs, neuronal cells and endothelial cells and has been shown to potentiate the suppressive effects and overall functional 
properties of Tregs. Our focus on TNFR2 antibody candidates that show selective Treg cell binding and signaling profiles that may be developed for 
treatment of autoimmune diseases, such as ulcerative colitis, multiple sclerosis and vitiligo. We began carrying out Investigational New Drug (IND) 
enabling studies for this program in 2024, after having exercised an option in December 2023 to gain an exclusive license to specified agonistic antibodies 
and other materials that were developed pursuant to a research collaboration and license option agreement we entered into with Biolojic Design, Ltd. in 
2021.   
We have historically derived substantially all of our revenue and significant amounts of research and development operating capital from our 
collaboration agreements. In addition to payments received under the Lilly Agreement, we have received upfront and milestone payments and cost-sharing 
reimbursements under a number of other previous collaboration agreements, and certain of our collaboration partners, have borne substantial costs of 
developing our drug candidates. We expect we will continue our approach of entering into revenue-generating collaboration agreements to pay in whole or 
in part the development costs of our drug candidates.  
Several of our historical collaboration agreements have resulted in approved drugs, for which we may be entitled to royalties for net sales of these 
approved drugs. However, we have sold our rights to receive royalties under these arrangements, including:
•
2012 Purchase and Sale Agreement: In 2012, we sold all of our rights to receive royalties from CIMZIA® (for the treatment of Crohn’s 
disease and other autoimmune indications) and MIRCERA® (for the treatment of anemia associated with chronic kidney disease) under 
our collaborations with UCB Pharma (UCB) and F. Hoffmann-La Roche Ltd, respectively, to RPI Finance Trust (RPI), an affiliate of 
Royalty Pharma for $124.0 million.
•
2020 Purchase and Sale Agreement: In December 2020, we sold our rights, subject to a cap, to receive royalties from MOVANTIK® / 
MOVENTIG® (for the treatment of opioid-induced constipation), ADYNOVATE® / ADYNOVI® (a half-life extension product of Factor 
VIII) and other hemophilia products, under our arrangements with AstraZeneca AB, Baxalta, Inc. (a wholly owned-subsidiary of Takeda 
Pharmaceutical Company Ltd.), and Novo Nordisk A/S, respectively, for $150.0 million to entities managed by Healthcare Royalty 
Management, LLC (HCR) under a capped sale arrangement, such that all future royalties were to return to Nektar if HCR receives $210.0 
million in royalties by December 31, 2025 (the 2025 Threshold) or $240.0 million if the 2025 Threshold was not met. On March 4, 2024, 
Nektar and HCR amended the 2020 Purchase and Sale Agreement to remove the cap on the royalties in exchange for $15.0 million. See 
Note 5 to our Consolidated Financial Statements for additional information.

 
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We continued to manufacture the polymer reagents used in the production of some of the drug products until the sale of the Facility in December 
2024. The sale of the Facility does not alter the royalties or other milestones payable under these agreements or our collaboration agreement with UCB for 
dapirolizumab pegol as further disclosed in Note 9 to our Consolidated Financial Statements. 
Our business is subject to significant risks, including the risks inherent in our development efforts, the results of our clinical trials, our dependence 
on the marketing efforts by our collaboration partners, uncertainties associated with obtaining and enforcing patents, the lengthy and expensive regulatory 
approval process and competition from other products. Drug research and development is an inherently uncertain process with a high risk of failure at every 
stage prior to approval. The timing and outcome of clinical trial results are extremely difficult to predict. Clinical development successes and failures can 
have a disproportionately positive or negative impact on our scientific and medical prospects, financial condition and prospects, results of operations and 
market opportunities. For a discussion of these and some of the other key risks and uncertainties affecting our business, see Item 1A “Risk Factors.”
With respect to financing our near-term business needs, as set forth below in “Key Developments and Trends in Liquidity and Capital Resources,” 
we estimate we have working capital to fund our current business plans through at least the next twelve months. At December 31, 2024, we had 
approximately $269.1 million in cash and investments in marketable securities.
Results of Operations
The results of operations for the years ended December 31, 2024 and 2023 are presented below (in thousands, except percentages). 
 
 
Year Ended December 31,
   
$ Change

2024 vs. 2023
   
% Change

2024 vs. 2023
 
 
 
2024
   
2023
   
 
   
 
 
Revenue:
 
    
    
    
 
 
Product sales
  $
33,563    $
20,681    $
12,882     
62%
Non-cash royalty revenue related to sales of future royalties
   
64,267     
68,921     
(4,654)    
(7)%
License, collaboration and other revenue
   
597     
520     
77     
15%
Total revenue
   
98,427     
90,122     
8,305     
9%
Operating costs and expenses:
 
    
    
    
 
 
Cost of goods sold
   
30,686     
33,768     
(3,082)    
(9)%
Research and development
   
120,908     
114,162     
6,746     
6%
General and administrative
   
76,751     
77,417     
(666)    
(1)%
Restructuring and impairment
   
15,670     
51,958     
(36,288)    
(70)%
Impairment of goodwill
   
—     
76,501     
(76,501)    
(100)%
Gain on sale of the Huntsville manufacturing facility
   
(40,390)    
—     
(40,390)  
n/m
 
Total operating costs and expenses
   
203,625     
353,806     
(150,181)    
(42)%
Loss from operations
   
(105,198)    
(263,684)    
158,486     
(60)%
Non-operating income (expense):
 
    
    
    
 
 
Non-cash interest expense on liability related to sale of future royalties
   
(28,112)    
(25,334)    
(2,778)    
11%
Interest income
   
14,500     
19,009     
(4,509)    
(24)%
Other income (expense), net
   
(390)    
(6,247)    
5,857     
(94)%
Total non-operating income (expense), net
   
(14,002)    
(12,572)    
(1,430)    
11%
Loss before provision for income taxes
   
(119,200)    
(276,256)    
157,056     
(57)%
Provision (benefit) for income taxes
   
(239)    
(200)    
(39)    
20%
Net loss
  $
(118,961)   $
(276,056)   $
157,095     
(57)%
 
 
    
    
    
 
 
n/m - not meaningful
 
    
    
    
 
 
 

 
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Revenue
Our revenue has historically been derived from our collaboration agreements, under which we may receive product sales revenue, royalties, and 
license fees, as well as development and sales milestones and other contingent payments. We recognize revenue when we transfer promised goods or 
services to our collaboration partners.
•
Product sales and Cost of goods sold: Product sales include predominantly fixed price manufacturing and supply agreements with our 
collaboration partners and are the result of firm purchase orders from those partners. Accordingly, the revenue recognized in a given period is 
based solely on the demand and requirements of our collaboration partners and is not ratable throughout the year. Due to the sale of the 
Facility in December 2024, we do not expect to recognize product sales or costs of goods sold in 2025. 
We historically had a manufacturing arrangement with UCB that included a fixed price which was less than the fully burdened manufacturing 
cost for the reagent. As a result of this arrangement, gross margin was negative for 2023 and earlier periods, as we had negotiated this fixed 
price in exchange for a higher royalty rate. Accordingly, when evaluating the net realizable value of our inventory for UCB, we include the 
negotiated increase of the royalties in our analysis, and the aggregate revenue had historically been greater than our manufacturing cost. Due 
to the decreases in the royalty rates for 2024 as a result of a settlement agreement with UCB, the aggregate revenue was expected to be less 
than our manufacturing cost, and therefore we recorded a provision for net realizable value during the year ended December 31, 2023. See 
Note 5 to our Consolidated Financial Statements for additional information on the settlement agreement with UCB.
On July 31, 2024, and further formalized in an Amended and Restated Manufacturing and Supply Agreement dated October 18, 2024, we 
entered into a long-term “take or pay” supply agreement with UCB that increased the selling price of the PEG reagent used in the 
manufacture of CIMZIA® (the UCB Supply Agreement). The UCB Supply Agreement also covers UCB’s purchases of the same reagent (at 
the same price) for use in the manufacture of dapirolizumab pegol. We analyzed the terms of the agreement, including its cancellation 
provisions, and concluded that it represents a long-term agreement. Since the performance obligations are deliveries of a single reagent, we 
determined a single sales price for recognition of revenue over the term of the arrangement. Because the billed price was less than the single 
sales price, we recorded an increase to product sales of $7.8 million during the year ended December 31, 2024. Additionally, we released the 
provision for net realizable value previously recorded for inventory on hand. 
As discussed above and disclosed in Note 1 to our Consolidated Financial Statements, in December 2024, we completed the sale of the 
Facility which included the assignment of our manufacturing and supply agreements to Gannet BioChem. Upon closing of the Transactions, 
we derecognized the contract asset and will no longer record product sales and cost of goods sold related to the manufacturing of PEG 
reagent for UCB or other customers. 
•
Non-cash royalty revenue and Non-cash interest expense: We recognize non-cash royalty revenue and non-cash interest expense resulting 
from royalties on several products for which we had previously sold our rights to receive royalties under the 2012 and 2020 Purchase and 
Sale Agreements. See Note 5 to our Consolidated Financial Statements for additional information regarding these agreements. These non-
cash revenues and expenses have no effect on our cash flows, and we do not consider them material to our operations. We expect non-cash 
royalty revenue to decrease for 2025 as compared to 2024 due to the decrease in the royalty rate from UCB and the end of the royalty term 
for US sales of MIRCERA® in late 2024, and we expect non-cash interest expense to decrease as a result of the lower liability balances.
On March 4, 2024, Nektar and HCR amended the 2020 Purchase and Sale Agreement to remove the cap on the royalties in exchange for a 
$15.0 million payment to Nektar. See Note 5 to our Consolidated Financial Statements for additional information.
•
License, collaboration and other revenue: License, collaboration and other revenue includes the recognition of upfront payments, 
milestone and other contingent payments received in connection with our license and collaboration agreements. The amount of revenue 
depends in part upon the estimated recognition period of the upfront payments allocated to continuing performance obligations, the 
achievement of milestones and other contingent events, the continuation of existing collaborations, the amount of research and development 
work, and entering into new collaboration agreements, if any. License, collaboration and other revenue was not material for 2023 or 2024, 
and, unless we enter into a new collaboration agreement with upfront payments, we do not expect to recognize significant revenue in 2025.

 
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The timing and future success of our drug development programs and those of our collaboration partners are subject to a number of risks and 
uncertainties. See Item 1A. Risk Factors for discussion of the risks associated with the complex nature of our collaboration agreements.
Research and Development Expense
Research and development expense consists primarily of clinical study costs, contract manufacturing costs, direct costs of outside research, 
materials, supplies, licenses and fees as well as personnel costs (including salaries, benefits, and non-cash stock-based compensation). Research and 
development expense also includes certain overhead allocations consisting of support and facilities-related costs. Where we perform research and 
development activities under a joint development collaboration, such as our collaboration with BMS, we record the expense reimbursement from our 
partners as a reduction to research and development expense, and we record our share of our partners’ expenses as an increase to research and development 
expense.
The following table presents expenses incurred for direct third-party costs, including clinical and regulatory services, contract manufacturing, 
clinical supplies, and preclinical study support for each of our drug candidates. The table also presents personnel, overhead and other indirect costs as we 
utilize our employee and infrastructure resources across multiple development and research programs (in thousands):
 
 
 
Clinical Study
 
Year Ended December 31,
 
 
 
Status(1)
 
2024
   
2023
 
Rezpegaldesleukin (cytokine Treg stimulant)(2)
 
Phase 2b
  $
49,382    $
14,554 
NKTR-255 (IL-15 receptor agonist)
 
Phase 1/2
   
15,795     
26,132 
NKTR-0165 (tumor necrosis factor receptor type II agonist)
 
Preclinical
   
9,339     
9,345 
Discovery research and other programs
 
Various
   
2,334     
1,862 
Total clinical development, contract manufacturing and other third party costs
 
 
   
76,850     
51,893 
Personnel, overhead and other costs
 
    
34,629     
45,503 
Stock-based compensation and depreciation
 
    
9,429     
16,766 
Research and development expense
 
   $
120,908    $
114,162 
 
(1)
Clinical Study Status as of December 31, 2024. Definitions are provided in Part I, Item 1. Business.
(2)
The amounts include our 25% share of costs incurred by Lilly for the Phase 1b and Phase 2 development of rezpegaldesleukin prior to termination of 
the Lilly collaboration agreement in 2023. Lilly was responsible for 75% of costs.
Research and development expense for rezpegaldesleukin increased significantly for the full year 2024 as compared to the full year 2023, due to 
the initiation of the Phase 2b study in patients with moderate-to-severe atopic dermatitis in October 2023 and the Phase 2b study in patients with severe-to-
very severe alopecia areata in March 2024. Excluding any potential additional development activities for rezpegaldesleukin dependent on the results of 
these trials, we expect the costs of development of rezpegaldesleukin for full year 2025 to be consistent with full year 2024 as these Phase 2b studies 
continue.
Research and development expense for NKTR-255 decreased for the full year 2024 as compared to the full year 2023, as our development 
activities in 2024 are reduced compared to the prior period, and we expect development expense for the full year 2025 to decrease as compared to 2024 for 
this same reason. Our development expense for NKTR-255 includes the Nektar-sponsored Phase 2 study to evaluate NKTR-255 following Yescarta® or 
Breyanzi® CD19 CAR-T cell therapy in patients with large B-cell lymphoma, the Fred Hutchinson Cancer Center investigator-sponsored study evaluating 
NKTR-255 following Breyanzi® CD19 CAR-T cell therapy in patients with relapsed/refractory large B-cell lymphoma, our oncology clinical collaboration 
with Merck KGaA to evaluate the maintenance regimen of NKTR-255 in combination with avelumab, a PD-L1 inhibitor, in patients with locally advanced 
or metastatic urothelial carcinoma in the Phase II JAVELIN Bladder Medley study, and an ongoing investigator sponsored study evaluating NKTR-255 in 
combination with IMFINZI (durvalumab) in patients with unresectable Stage 3 NSCLC who have received chemoradiation. We expect the costs of 
development of NKTR-255 to decrease for full year 2025 as compared to full year 2024 as we have completed our Phase 2 study in patients with large B-
cell lymphoma.
In December 2023, for our NKTR-0165 program, we exercised an option to gain an exclusive license to specified agonistic antibodies and other 
materials that were developed pursuant to a research collaboration and license option agreement we entered into with Biolojic Design, Ltd. in 2021. 
Excluding this cost, research and development expense for NKTR-0165 increased significantly for the full year 2024 as compared to the full year 2023, as 
we began conducting IND 

 
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enabling activities for this program in 2024. We expect development expense for NKTR-0165 for full year 2025 to increase slightly as compared to full 
year 2024 as we continue the IND enabling activities.
Personnel, overhead and other costs decreased for the full year 2024 as compared to the full year 2023 due to our 2023 Restructuring Plan (as 
further disclosed in Note 10 to our Consolidated Financial Statements), pursuant to which we reduced our San Francisco-based workforce by 
approximately 60%, which was substantially completed by June 2023. Additionally, pursuant to the 2023 Restructuring Plan, we decided to sublease our 
remaining office and laboratory space on Mission Bay Blvd. South (the Mission Bay Facility), and therefore we ceased recording a portion of the related 
lease expense as research and development expense after June 2023 upon completing the reduction in force. We expect personnel, overhead and other costs 
for full year 2025 to be consistent with full year 2024.
Excluding any potential additional development activities for rezpegaldesleukin dependent on the results of our Phase 2b trials, we expect 
research and development expense in total for full year 2025 to be consistent with 2024.
The timing and amount of our future clinical trial expenses will vary significantly based upon our evaluation of ongoing clinical results and the 
structure, timing, and scope of additional clinical development programs and potential clinical collaboration partnerships (if any) for these programs.
In addition to our drug candidates that we plan to evaluate in clinical development during 2025 and beyond, we believe it is vitally important to 
continue our substantial investment in a pipeline of new drug candidates to continue to build the value of our drug candidate pipeline and our business. We 
continue our interest in identifying new drug candidates across a wide range of molecule classes, including small molecules and large proteins, peptides and 
antibodies, across multiple therapeutic areas. We also plan from time to time to evaluate opportunities to in-license potential drug candidates from third 
parties to add to our development pipeline. We plan to continue to advance our most promising early research drug candidates into preclinical development 
with the objective to advance these early-stage research programs to human clinical studies over the next several years.
Our expenditures on current and future preclinical and clinical development programs are subject to numerous uncertainties in timing and cost to 
completion. In order to advance our drug candidates through clinical development, each drug candidate must be tested in numerous preclinical safety, 
toxicology and efficacy studies. We then conduct clinical studies for our drug candidates that take several years to complete. The cost and time required to 
complete clinical trials may vary significantly over the life of a clinical development program as a result of a variety of factors, including but not limited to:
•
the number of patients required for a given clinical study design;
•
the length of time required to enroll clinical study participants;
•
the number and location of sites included in the clinical studies;
•
the clinical study designs required by the health authorities (i.e. primary and secondary endpoints as well as the size of the study population 
needed to demonstrate efficacy and safety outcomes);
•
the potential for changing standards of care for the target patient population;
•
the competition for patient recruitment from competitive drug candidates being studied in the same clinical setting;
•
the costs of producing supplies of the drug candidates needed for clinical trials and regulatory submissions;
•
the safety and efficacy profile of the drug candidate;
•
the use of clinical research organizations to assist with the management of the trials; and
•
the costs and timing of, and the ability to secure, approvals from government health authorities.
Furthermore, our strategy includes the potential of entering into collaborations with third parties to participate in the development and 
commercialization of some of our drug candidates, or clinical collaborations where we would share costs and operational responsibility with a partner. In 
certain situations, the clinical development program and process for a drug candidate and the estimated completion date will largely be under the control of 
that third party and not under our control. We cannot forecast with any degree of certainty which of our drug candidates will be subject to future 
collaborations or how such arrangements would affect our development plans or capital requirements.

 
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General and Administrative Expense
General and administrative expense includes the cost of administrative staffing, finance and legal activities, including certain overhead allocations 
consisting of support and facilities-related costs. Additionally, general and administrative expense includes our lease and other facilities expenses for 
spaces we have sublet or are seeking to sublease, net of sublease income. 
General and administrative expense remained consistent for the full year 2024 as compared to the full year 2023. Personnel costs decreased for the 
full year 2024 as compared to the full year 2023 because, as discussed in Note 10 to our Consolidated Financial Statements, pursuant our 2023 
Restructuring Plan, we reduced our San Francisco-based workforce by approximately 60%, which we substantially completed by June 2023. Stock-based 
compensation expense decreased due to this reduction in force, as well as a lower valuation on more recent grants due to the decrease in our stock price. As 
discussed above, as a result of the reduction in force and our decision to seek a sublease for our remaining space in our Mission Bay Blvd. South facility, 
we ceased recording the related facilities expense as research and development expense after June 2023, resulting in an increase to general and 
administrative expense. Additionally, general and administrative expense increased for commercial litigation expenses, as further discussed in Note 7 to our
Consolidated Financial Statements.
We expect general and administrative expense for full year 2025 to decrease as compared to full year 2024 due to lower amounts of stock-based 
compensation expense, due to lower valuations on more recent grants due to the decrease in our stock price, as well as lower lease expense due to the 
impairment charges we recorded in 2024. 
Restructuring and Impairment
As discussed in Note 10 to our Consolidated Financial Statements, we have incurred significant costs as a result of our 2022 and 2023 
Restructuring Plans. In connection with these events, we reported the following costs in restructuring and impairment as further described and disclosed in 
Note 10 to our Consolidated Financial Statements (in thousands):
 
 
 
Year ended December 31,
 
 
 
2024
   
2023
 
Severance and benefit expense
 $
— 
 $
7,885 
Impairment of right-of-use assets and property, plant and equipment
  
8,329 
  
35,328 
Loss on sale of other property, plant and equipment, net
  
— 
  
1,300 
Contract termination and other restructuring costs
  
7,341 
  
7,445 
Restructuring and impairment
 $
15,670 
 $
51,958 
 
•
Severance and benefits expense: We recognized $7.9 million for severance and benefit expense in 2023 related to the 2023 Restructuring 
Plan. We did not recognize expense for either the 2022 or 2023 Restructuring Plans in 2024, and do not expect to recognize any additional 
expenses for either the 2022 or 2023 Restructuring Plans in 2025.
•
Impairment of right-of-use assets and property, plant and equipment: We recognized $35.3 million in non-cash impairment charges for the 
full year 2023, primarily for the Mission Bay Facility and our office space on Third St. (the Third St. Facility), reflecting deteriorations in 
both the laboratory and office lease markets. The non-cash impairment charges for the full year 2024 reflect additional impairment charges 
for these spaces as these lease markets continued to deteriorate. While we continue to seek subleases for our remaining spaces, we will 
continue to update our estimates based on changes in market conditions, whether or not we are able to enter into subleases and, if we do enter 
into subleases, the economic terms of those subleases, and we may record incremental non-cash impairment charges in future periods as these 
estimates change.
•
Loss on sale or disposal of property, plant and equipment, net: The net loss in 2023 relates to the sale of excess lab equipment.
•
Contract termination and other restructuring charges: We recognized $7.3 million and $2.0 million in contract termination costs for the full 
years 2024 and 2023, respectively, primarily resulting from our 2022 Restructuring Plan. We will continue to recognize expense as our 
estimates change until final settlement. We recognized $5.5 million for the full year of 2023 for the wind down of the bempegaldesleukin 
program. Because the amounts have become immaterial, we report these costs within research and development expense for 2024. We expect 
these costs to remain immaterial in 2025.

 
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Impairment of Goodwill
As discussed in Note 11 to our Consolidated Financial Statements, during the three months ended March 31, 2023, our stock price and resulting 
market capitalization experienced a significant, sustained decline. As a result and in accordance with ASC 350-20 Goodwill and ASC 820-10 Fair Value 
Measurement, we measured the fair value of the Company based on income and market approaches. Based on this analysis, we wrote off all of our 
goodwill in the three months ended March 31, 2023. We had previously recognized goodwill primarily from our acquisitions of Shearwater Corp. and 
Aerogen, Inc. in 2001 and 2005, respectively.
Gain on Sale of the Huntsville Manufacturing Facility
As discussed in Note 1 to our Consolidated Financial Statements, we sold the Facility which included the assignment of our manufacturing and 
supply agreements to Gannet BioChem, an affiliate of Ampersand Capital Partners, for consideration of $64.7 million in cash, net of transaction costs, and 
an approximate 20% equity interest at the time of close in Gannet BioChem. This resulted in a net gain on sale of $40.4 million, after accounting for the net 
carrying value of all assets and liabilities sold and closing costs. See Note 12 to our Consolidated Financial Statements for additional information.
Interest Income
Interest income decreased for the full year 2024 as compared to the full year 2023, primarily due to lower investment balances as we have utilized 
our cash to fund our operations. We expect interest income to decrease for 2025 due to lower investment balances as we fund our operations.
Other income (expense), net
We recorded a net loss of $5.1 million for the reclassification of the cumulative translation adjustment for the wind down of our foreign 
subsidiaries in the year ended December 31, 2023. We did not recognize significant reclassifications in 2024, and we do not expect to recognize significant 
reclassification adjustments in 2025.
Liquidity and Capital Resources
We have financed our operations primarily through revenue from upfront and milestone payments under our strategic collaboration agreements, 
royalties and product sales, as well as public and private placements of debt and equity securities. As of December 31, 2024, we had approximately $269.1 
million in cash and investments in marketable securities. 
During the year ended December 31, 2024, we entered into the following financing and investing transactions:
•
On February 12, 2024, for total cash consideration paid of $3.0 million, we repurchased the 8.3 million shares previously sold to BMS. See 
Note 9 to our Consolidated Financial Statements for additional information.
•
On March 4, 2024, we entered into a Securities Purchase Agreement with TCG Crossover Fund II, L.P. (TCG), pursuant to which we issued 
a pre-funded warrant to TCG to purchase 25,000,000 shares of Nektar’s common stock for gross proceeds of $30.0 million (or a purchase 
price of $1.20 per share of common stock that can be issued upon exercise of the pre-funded warrant). On May 28, 2024, we filed with the 
SEC a registration statement on Form S-3 (file no. 333-279760) registering for the resale of up to 25,000,000 shares of Nektar’s common 
stock upon exercise of the pre-funded warrant issued to TCG pursuant to the Securities Purchase Agreement. The registration statement 
became effective on June 5, 2024. See Note 6 to our Consolidated Financial Statements for additional information.
•
On March 4, 2024, for total cash consideration received of $15.0 million, Nektar entered into an amendment with HCR to remove the cap 
under the 2020 Purchase and Sale Agreement. See Note 5 to our Consolidated Financial Statements for additional information.
•
As discussed above, in December 2024, we completed the sale of the Facility which included the assignment of our manufacturing and 
supply agreements to Gannet BioChem, an affiliate of Ampersand Capital Partners, for consideration of $64.7 million in cash, net of 
transaction costs, and an approximate 20% equity interest at the time of close in Gannet BioChem.
We estimate that we have working capital to fund our current business plans for at least the next twelve months from the date of filing.
We expect the clinical development of our drug candidates, including rezpegaldesleukin, NKTR-255 and NKTR-0165, will continue to require 
significant investment to continue to advance in clinical development with the objective of obtaining regulatory approval or entering into one or more 
collaboration partnerships. In the past, we have received a number 

 
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of significant payments from collaboration agreements and other significant transactions, including $1.9 billion in total consideration received under our 
arrangement with BMS, development cost reimbursements from BMS, and a $150.0 million upfront payment from Lilly for our collaboration agreement 
for rezpegaldesleukin. Additionally, certain of our collaboration partners, have borne substantial costs of developing our drug candidates. We expect we 
will continue our approach of entering into revenue-generating collaboration agreements to pay in whole or in part the development costs of our drug 
candidates.
Our current business is subject to significant uncertainties and risks as a result of, among other factors, clinical and regulatory outcomes for 
rezpegaldesleukin, NKTR-255 and NKTR-0165; the sales levels for those products, if and when they are approved; whether, when and on what terms we 
are able to enter into new collaboration transactions; expenses being higher than anticipated, unplanned expenses and the need to satisfy contingent 
liabilities, including litigation matters and indemnification obligations; and cash receipts, including sublease income, being lower than anticipated.
We have no credit facility or any other sources of committed capital. The availability and terms of various financing alternatives, if required in the 
future, substantially depend on many factors including the success or failure of drug development programs in our pipeline. The availability and terms of 
financing alternatives and any future significant payments from existing or new collaborations depend on the positive outcome of ongoing or planned 
clinical studies, whether we or our partners are successful in obtaining regulatory authority approvals in major markets, and if approved, the commercial 
success of these drugs, as well as general capital market conditions. We may pursue various financing alternatives to fund the expansion of our business as 
appropriate.
As a result of our 2022 and 2023 Restructuring Plans, we are seeking to sublease all of our laboratory and office space in the Mission Bay Facility 
and our office space in Third St. Facility, and we have current subleases for a portion of the Mission Bay Facility. The San Francisco Bay Area office lease 
market has been negatively impacted by economic uncertainties, particularly impacting the technology industry, and the change in work habits as 
employees continue to work remotely. Accordingly, for the Third St. Facility, there is significant uncertainty as to whether or when we will be able to enter 
into a sublease as well as the economic terms of such subleases, if any. Meanwhile, the San Francisco Bay Area life sciences lease market has weakened 
during 2023 and 2024, including a significant increase in available leasable space in the San Francisco Bay Area. Accordingly, there is increased 
uncertainty as to whether or when we will be able to enter into a sublease as well as the economic terms of such subleases, if any.
Due to the potential for adverse developments in the credit markets, we may experience reduced liquidity with respect to some of our investments 
in marketable securities. These investments are generally held to maturity, which, in accordance with our investment policy, is less than two years. 
However, if the need arises to liquidate such securities before maturity, we may experience losses on liquidation. To date we have not experienced any 
liquidity issues with respect to these securities. We believe that, even allowing for potential liquidity issues with respect to these securities and the effect of 
various conditions on the financial markets, our remaining cash and investments in marketable securities will be sufficient to meet our anticipated cash 
needs for at least the next twelve months.
Cash flows from operating activities
Cash flows used in operating activities for the years ended December 31, 2024 and 2023 totaled $175.7 million and $192.6 million, respectively.
We expect that cash flows used in operating activities, excluding upfront, milestone and other contingent payments received, if any, will remain 
consistent for 2025 as compared to 2024.
Cash flows from investing activities
During the years ended December 31, 2024 and 2023, the maturities of our investments, net of purchases, totaled $78.7 million and $139.2 
million, respectively, which we used to fund our operations.
As discussed above, in December 2024, we completed the sale of the Facility which included the assignment of our manufacturing and supply 
agreements to Gannet BioChem, an affiliate of Ampersand Capital Partners, for consideration of $64.7 million in cash, net of transaction costs, and an 
approximate 20% equity interest at the time of close in Gannet BioChem. 
Our other investing activities were not significant for the periods presented.

 
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Cash flows from financing activities
Other than the three financing activities described above during the three months ended March 31, 2024, our cash flows from financing activities 
for the years December 31, 2024 and 2023 were not significant.
Critical Accounting Policies and Estimates
The preparation and presentation of financial statements in conformity with U.S. generally accepted accounting principles (GAAP) requires 
management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities 
at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period.
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 our basis for making judgments about the carrying value of assets and liabilities that are not readily apparent from other sources. We 
evaluate our estimates on an ongoing basis. Actual results may differ from those estimates under different assumptions or conditions. We have determined 
that, for the periods in this report, the following accounting policies and estimates are critical in understanding our financial condition and the results of our 
operations.
Impairment of Long-Lived Assets
We assess the impairment of long-lived assets whenever events or changes in business circumstances indicate that the carrying amounts of the 
assets may not be fully recoverable. In the case of property, plant and equipment and right-of-use assets for our leases, we determine whether there has 
been an impairment by comparing the carrying value of the asset to the anticipated undiscounted net cash flows associated with the asset. If such cash flows
are less than the carrying value, we write down the asset to its fair value, which may be measured as anticipated discounted net cash flows associated with 
the asset.
As discussed in Note 10, in connection with our 2022 and 2023 Restructuring Plans, we have decided to sublease all of our leased spaces on the 
Third St. and the Mission Bay Blvd. South, and we have sublet 29,000 square feet of space. Accordingly, we evaluated each space for impairment when 
management decided to sublease the respective space and at each reporting date thereafter, as facts and circumstances change. The significant assumptions 
in our impairment analysis relate to sublease income, including the length of time to enter into a sublease, sublease rental payments, free rent periods, 
tenant improvement allowances and broker commissions. When available, we use sublease negotiations or agreements, but in the absence of such 
information, we develop our own subjective estimates based on current real estate trends and market conditions. Accordingly, our estimates are subject to 
significant risk, and the terms of sublease agreements, if any, and the resulting amount and timing of sublease income, if ever realized, may be materially 
different than our estimates.  
As part of our evaluation of each sublease space, we separately compare the estimated undiscounted sublease income, as described above, for each 
sublease to the net book value of the related long-term assets, which include right-of-use assets and certain property, plant and equipment, primarily for 
leasehold improvements (collectively, sublease assets). If such sublease income exceeds the net book value of the sublease assets, we do not record an 
impairment charge. Otherwise, we record an impairment charge by reducing the net book value of the sublease assets to their estimated fair value, which 
we determined by discounting the estimated sublease income using the estimated borrowing rate of a market participant subtenant. Determination of these 
key assumptions is complex and highly judgmental.
For certain impairment charges, we used the terms of active sublease negotiations or agreements to estimate sublease income. However, for the 
most significant impairment charges we recorded, we developed our estimates of the time to enter into a sublease and sublease payments, including 
estimated free rent periods, based on current real estate trends and market conditions. Accordingly, if our estimates for the time to enter the sublease and 
estimated free rent periods were longer (shorter), the impairment charge would be greater (smaller), and if our estimates for the rental rates were lower 
(higher), the impairment charge would be greater (smaller). Given the current office and life sciences lease market rental conditions in San Francisco and 
the larger Bay Area, our estimates are subject to significant uncertainty. The ultimate amount of sublease income may be significantly lower or higher than 
the amounts used to record our impairment charges, and we may record additional impairment charges in future periods as our estimates change or when 
we enter into sublease negotiations or execute a sublease agreement.
Collaborative Arrangements
When we enter into collaboration agreements with pharmaceutical and biotechnology partners, we assess whether the arrangements fall within the 
scope of Accounting Standards Codification (ASC) 808, Collaborative Arrangements (ASC 808) based on whether the arrangements involve joint 
operating activities and whether both parties have active participation 

 
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in the arrangement and are exposed to significant risks and rewards. To the extent that the arrangement falls within the scope of ASC 808, we assess 
whether the payments between us and our collaboration partner fall within the scope of other accounting literature. If we conclude that payments from the 
collaboration partner to us represent consideration from a customer, such as license fees and contract research and development activities, we account for 
those payments within the scope of ASC 606, Revenue from Contracts with Customers. However, if we conclude that our collaboration partner is not a 
customer for certain activities and associated payments, such as for certain collaborative research, development, manufacturing and commercial activities, 
we record such payments as a reduction of research and development expense or general and administrative expense, based on where we record the 
underlying expense.
Revenue Recognition
We recognize license, collaboration and other research revenue, including the upfront fees and milestone payments based on the facts and 
circumstances of each contractual agreement. At the inception of each agreement, we determine which promises represent distinct performance obligations, 
for which management must use significant judgment. Additionally, at inception and at each reporting date thereafter, we must determine and update, as 
appropriate, the transaction price, which includes variable consideration such as development and commercial launch milestones. We must use judgment to 
determine when to include the variable consideration for these milestones in the transaction price such that inclusion of such variable consideration will not 
result in a significant reversal of revenue recognized when the contingency surrounding the variable consideration is resolved. Due to the significant 
uncertainties involved with clinical development and regulatory approval, we generally do not believe that we would update the transaction price before 
events that are outside of our control occur, such as the release of clinical trial results, regulatory acceptance of a BLA or similar filing or regulatory 
approval. However, if these results are positive, we may conclude that certain milestones meet the recognition requirements for inclusion in the transaction 
price and therefore we would recognize them as revenue before the milestone event occurs and the payment becomes due to us, provided that the 
achievement of the milestone is within our control.
Accrued Clinical Trial Expenses
We record an accrued expense for the estimated unbilled costs of our clinical study activities performed by third parties, and there may be 
significant delays between these expenses being incurred and the timing of vendor submission of invoices to us. The financial terms of these agreements 
are subject to negotiation, vary from contract to contract and may result in uneven payment flows to our vendors. Payments under the contracts depend on 
factors such as the achievement of certain events, successful enrollment of patients and completion of certain clinical trial activities. We generally 
recognize costs associated with the start-up and reporting phases of the clinical trials as incurred. We generally accrue costs associated with the treatment 
phase of clinical trials based on the estimated activities performed by our third-party vendors, including our contract research organizations. In specific 
circumstances, such as for certain time-based costs, we recognize clinical trial expenses ratably over the service period, as we believe that this methodology 
may be more reflective of the timing of costs incurred.
We base our estimates on the best information available at the time. However, additional information may become available to us which may 
allow us to make a more accurate estimate in future periods. In this event, we may be required to record adjustments to research and development expenses 
in future periods when the actual level of activity becomes more certain. Such increases or decreases in cost are generally considered to be changes in 
estimates and will be reflected in research and development expenses in the period identified.
Recent Accounting Pronouncements
For information about recent accounting pronouncements, see Note 1 to our Consolidated Financial Statements.
Item 7A. Quantitative and Qualitative Disclosures About Market Risk
Inflation Risk
We are exposed to the risk of inflation, which has increased significantly during 2023 and continued to increase in 2024, and may result in 
increases to our operating expenses.
Interest Rate and Market Risk
The primary objective of our investment activities is to preserve principal while at the same time maximizing yields without significantly 
increasing risk. To achieve this objective, we invest in liquid, high quality debt securities. Our investments in debt securities are subject to interest rate risk. 
To minimize the exposure due to an adverse shift in interest rates, we invest in securities with maturities of two years or less and maintain a weighted 
average maturity of one year or less.

 
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A hypothetical 50 basis point increase in interest rates would result in an approximate $0.5 million decrease, less than 1%, in the fair value of our 
available-for-sale securities at December 31, 2024. This potential change is based on sensitivity analyses performed on our investment securities at 
December 31, 2024. Actual results may differ materially. The same hypothetical 50 basis point increase in interest rates would have resulted in an 
approximate $0.6 million decrease, less than 1%, in the fair value of our available-for-sale securities at December 31, 2023.
As of December 31, 2024, we held $229.3 million of available-for-sale investments, excluding money market funds, with an average time to 
maturity of five months. To date we have not experienced any liquidity issues with respect to these securities, but should such issues arise, we may be 
required to hold some, or all, of these securities until maturity. We believe that, even allowing for potential liquidity issues with respect to these securities, 
our remaining cash, cash equivalents, and investments in marketable securities will be sufficient to meet our anticipated cash needs for at least the next 
twelve months. Based on our available cash, the timing of the maturities of our investments and our expected operating cash requirements, we currently do 
not intend to sell these securities prior to maturity and it is more likely than not that we will not be required to sell these securities before we recover the 
amortized cost basis.
Foreign Currency Risk
As a result of the sale of our research and development facility in India, we have cash and investment balances in India that we intend to repatriate 
as part of our closure of this entity. We are subject to foreign currency exchange risk until we repatriate these funds.
The majority of our revenue, expense, and capital purchasing activities are transacted in U.S. dollars. However, we have contracts with contract 
manufacturing organizations in Europe and incur costs from sites in a variety of international locations which are paid in their respective local currencies. 
Accordingly, we are subject to foreign currency exchange risk for these transactions.
Our international operations are subject to risks typical of international operations, including, but not limited to, differing economic conditions, 
changes in political climate, differing tax structures, other regulations and restrictions, and foreign exchange rate volatility. We do not utilize derivative 
financial instruments to manage our exchange rate risks. We do not believe that inflation has had a material adverse impact on our revenues or operations in 
any of the past two years.

 
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Item 8. Financial Statements and Supplementary Data
NEKTAR THERAPEUTICS
INDEX TO CONSOLIDATED FINANCIAL STATEMENTS
 
 
Page
Report of Independent Registered Public Accounting Firm (PCAOB ID: 42)
57
Consolidated Balance Sheets at December 31, 2024 and 2023
59
Consolidated Statements of Operations for each of the two years in the period ended December 31, 2024
60
Consolidated Statements of Comprehensive Loss for each of the two years in the period ended December 31, 2024
61
Consolidated Statements of Stockholders’ Equity for each of the two years in the period ended December 31, 2024
62
Consolidated Statements of Cash Flows for each of the two years in the period ended December 31, 2024
63
Notes to Consolidated Financial Statements
64
 

 
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Report of Independent Registered Public Accounting Firm
To the Stockholders and the Board of Directors of Nektar Therapeutics
 
Opinion on the Financial Statements
 
We have audited the accompanying consolidated balance sheets of Nektar Therapeutics (the Company) as of December 31, 2024 and 2023, the related 
consolidated statements of operations, comprehensive loss, stockholders’ equity and cash flows for each of the two years in the period ended December 31, 
2024, and the related notes (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present 
fairly, in all material respects, the financial position of the Company at December 31, 2024 and 2023, and the results of its operations and its cash flows for 
each of the two years in the period ended December 31, 2024, in conformity with U.S. generally accepted accounting principles.
 
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 Public Company Accounting Oversight Board (United States) 
(PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and 
regulations of the Securities and Exchange Commission and the PCAOB.
 
We conducted our audits 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. The Company is not required to have, nor 
were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits we are required to obtain an understanding of 
internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company's internal control over 
financial reporting. Accordingly, we express no such opinion.
 
Our 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 matter does not alter in any way our opinion 
on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion 
on the critical audit matter or on the account or disclosure to which it relates.

 
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  Impairment of Long-Lived Assets
 
Description of the Matter
  As discussed in Note 10 to the consolidated financial statements, during 2023 the Company announced a strategic 
reprioritization and cost restructuring plan (the “2023 Restructuring Plan”). Pursuant to the 2023 Restructuring Plan, 
the Company reduced their San Francisco based workforce and decided to sublease their remaining office and 
laboratory space on Mission Bay Blvd. South that was not planned to be sublet previously. This resulted in the 
recognition of impairment charges at the time of the reorganization. Due to the deteriorating real estate market, the 
Company recognized additional impairment charges for this space as well as additional office and laboratory space 
that the Company previously sought to sublease during 2022. For the year ended December 31, 2024, the Company 
recorded aggregate impairment charges of $8.3 million related to the right-of-use asset and associated property, plant 
and equipment.
 
 
  We identified the impairment of the Company’s right-of-use assets as a critical audit matter. Auditing the Company’s 
right-of-use asset impairment model was complex due to the subjectivity of certain unobservable assumptions utilized 
to estimate the fair value of the right-of-use asset. In particular, determining the estimated length of time necessary to 
obtain a sublease tenant and estimating market rental rates of a market subtenant utilized in the computation of the 
fair value of the right-of-use-asset involve complexity due to the difficulty in estimating prospective market rental 
rates and forecasting future real estate trends.
 
How We Addressed the Matter in 
Our Audit
  Our audit procedures related to management’s computation of the estimated fair value of the right-of-use asset 
included, among others, evaluating the appropriateness of the methodology utilized by management to estimate the 
fair value of the right-of-use asset. We evaluated the accuracy and consistency of the application of the Company’s 
model to estimate the fair value of the right-of-use asset including the estimated length of time necessary to obtain a 
sublease tenant and the estimated market rental rates. We involved a specialist to assist in evaluating the 
appropriateness of the estimated rental market rates and estimated length of time to enter into a sublease utilized by 
the Company in their impairment assessment. 
 
 
/s/ Ernst & Young LLP
 
We have served as the Company’s auditor since 1993.
 
San Mateo, California
March 14, 2025

 
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NEKTAR THERAPEUTICS
CONSOLIDATED BALANCE SHEETS
(In thousands, except par value information)
 
 
 
December 31,
 
 
 
2024
   
2023
 
ASSETS
 
    
   
Current assets:
 
    
   
Cash and cash equivalents
  $
44,252    $
35,277 
Short-term investments
   
210,974     
268,339 
Accounts receivable
   
—     
1,205 
Inventory
   
—     
16,101 
Other current assets
   
6,066     
9,779 
Total current assets
   
261,292     
330,701 
Long-term investments
   
13,869     
25,825 
Property, plant and equipment, net
   
3,411     
18,856 
Operating lease right-of-use assets
   
8,413     
18,007 
Equity method investment in Gannet BioChem
   
12,218     
— 
Other assets
   
4,647     
4,644 
Total assets
  $
303,850    $
398,033 
LIABILITIES AND STOCKHOLDERS’ EQUITY
 
    
   
Current liabilities:
 
    
   
Accounts payable
  $
11,560    $
9,848 
Accrued expenses (including $3,403 and $0, respectively, to a related party)
   
29,972     
22,162 
Operating lease liabilities, current portion
   
19,868     
19,259 
Total current liabilities
   
61,400     
51,269 
Operating lease liabilities, less current portion
   
82,696     
98,517 
Liabilities related to the sales of future royalties, net
   
91,776     
112,625 
Other long-term liabilities
   
7,241     
4,635 
Total liabilities
   
243,113     
267,046 
Commitments and contingencies
 
    
   
Stockholders’ equity:
 
    
   
Preferred stock, $0.0001 par value; 10,000 shares authorized; no shares designated or outstanding 
at December 31, 2024 or 2023, respectively
   
—     
— 
Common stock, $0.0001 par value; 300,000 shares authorized; 194,062 shares and 191,384 shares 
issued at December 31, 2024 and 2023, respectively; 185,777 shares and 191,384 shares 
outstanding at December 31, 2024 and 2023, respectively
   
19     
19 
Capital in excess of par value
   
3,659,867     
3,608,137 
Treasury stock, at cost; 8,285 shares as of December 31, 2024 and none as of December 31, 2023, 
respectively
   
(3,000)    
— 
Accumulated other comprehensive income (loss)
   
61     
80 
Accumulated deficit
   
(3,596,210)    
(3,477,249)
Total stockholders’ equity
   
60,737     
130,987 
Total liabilities and stockholders’ equity
  $
303,850    $
398,033 
 
The accompanying notes are an integral part of these consolidated financial statements.

 
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NEKTAR THERAPEUTICS
CONSOLIDATED STATEMENTS OF OPERATIONS
(In thousands, except per share information)
 
 
 
Year Ended December 31,
 
 
 
2024
   
2023
 
Revenue:
 
     
   
Product sales
  $
33,563 
 $
20,681 
Non-cash royalty revenue related to the sales of future royalties
   
64,267 
  
68,921 
License, collaboration and other revenue
   
597 
  
520 
Total revenue
 
 
98,427 
  
90,122 
Operating costs and expenses:
 
     
   
Cost of goods sold
   
30,686 
  
33,768 
Research and development (including $277 and $0 from a related party)
   
120,908 
  
114,162 
General and administrative
   
76,751 
  
77,417 
Restructuring and impairment
   
15,670 
  
51,958 
Impairment of goodwill
   
— 
  
76,501 
Gain on sale of the Huntsville manufacturing facility
   
(40,390)
  
— 
Total operating costs and expenses
 
 
203,625 
  
353,806 
Loss from operations
   
(105,198)
  
(263,684)
Non-operating income (expense):
 
     
   
Non-cash interest expense on liabilities related to the sales of future royalties
   
(28,112)
  
(25,334)
Interest income
   
14,500 
  
19,009 
Other income (expense), net
   
(390)
  
(6,247)
Total non-operating income (expense), net
 
 
(14,002)
  
(12,572)
Loss before provision for income taxes
 
 
(119,200)
  
(276,256)
Provision (benefit) for income taxes
 
 
(239)
  
(200)
Net loss
 
$
(118,961)
 $
(276,056)
 
 
     
   
Basic and diluted net loss per share
 
$
(0.58)
 $
(1.45)
Weighted average shares outstanding used in computing basic and diluted net loss per share
 
 
205,661 
  
190,001 
 
The accompanying notes are an integral part of these consolidated financial statements.

 
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NEKTAR THERAPEUTICS
CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS
(In thousands)
 
 
 
Year Ended December 31,
 
 
 
2024
   
2023
 
Net loss
 
$
(118,961)
 $
(276,056)
Other comprehensive income (loss):
 
     
   
Net unrealized gain (loss) on available-for-sale investments
   
(15)
  
1,826 
Net foreign currency translation adjustment
   
(4)
  
5,161 
Other comprehensive income (loss)
 
 
(19)
  
6,987 
Comprehensive loss
 
$
(118,980)
 $
(269,069)
 
The accompanying notes are an integral part of these consolidated financial statements.
 

 
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NEKTAR THERAPEUTICS
CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY
(In thousands)
 
 
 
   
 
   
 
   
 
   
 
    Accumulated    
 
   
 
 
 
 
   
 
   
 
   
 
   
Capital in
   
Other
   
 
   
Total
 
 
Common Stock
   
Treasury Stock
   
Excess of
   
Comprehensi
ve
    Accumulated    
Stockholder
s’
 
 
Shares
   
Amount
   
Shares
   
Amount
   
Par Value
    Income (Loss)    
Deficit
   
Equity
 
Balance at December 31, 2022
  188,56
0    $
19     
—    $
—    $ 3,574,71
9    $
(6,907)   $ (3,201,19
3)   $ 366,638 
Shares issued under equity compensation 
plans
 
2,824     
—     
—     
—     
30     
—     
—     
30 
Stock-based compensation
 
—     
—     
—     
—     
33,388     
—     
—     
33,388 
Comprehensive income (loss)
 
—     
—     
—     
—     
—     
6,987     
(276,056)     (269,069)
Balance at December 31, 2023
  191,38
4     
19     
—     
—      3,608,13
7     
80      (3,477,24
9)     130,987 
Shares issued under equity compensation 
plans
 
2,678     
—     
—     
—     
118     
—     
—     
118 
Stock-based compensation
 
—     
—     
—     
—     
21,612     
—     
—     
21,612 
Repurchase of common stock from Bristol-
Myers Squibb
 
(8,285)    
—     
8,285      (3,000)    
—     
—     
—     
(3,000)
Issuance of prefunded warrant
 
—     
—     
—     
—     
30,000     
—     
—     
30,000 
Comprehensive income (loss)
 
—     
—     
—     
—     
—     
(19)    
(118,961)     (118,980)
Balance at December 31, 2024
  185,77
7    $
19 
 
 
8,285    $ (3,000)
 
$ 3,659,86
7 
 
$
61 
 
$ (3,596,21
0)
 
$
60,737 
 
The accompanying notes are an integral part of these consolidated financial statements.

 
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NEKTAR THERAPEUTICS
CONSOLIDATED STATEMENTS OF CASH FLOWS
(In thousands)
 
 
 
Year Ended December 31,
 
 
 
2024
   
2023
 
Cash flows from operating activities:
 
    
   
Net loss
  $
(118,961)   $
(276,056)
Adjustments to reconcile net loss to net cash used in operating activities:
 
    
   
Non-cash royalty revenue related to the sales of future royalties
   
(64,267)    
(68,921)
Non-cash interest expense on liabilities related to sales of future royalties
   
28,112     
25,334 
Stock-based compensation
   
21,612     
33,388 
Depreciation and amortization
   
4,391     
7,815 
Impairment of right-of-use assets and property, plant and equipment
   
8,329     
35,328 
Impairment of goodwill
   
—     
76,501 
Gain on sale of the Huntsville manufacturing facility
   
(40,390)    
— 
(Gain) loss on sale or disposal of property, plant and equipment, net
   
—     
1,300 
Provision for net realizable value of inventory
   
949     
2,402 
Foreign currency translation adjustment
   
—     
5,099 
Amortization of premiums (discounts), net
   
(9,245)    
(14,856)
Changes in operating assets and liabilities:
 
    
   
Accounts receivable
   
(3,045)    
4,776 
Inventory
   
497     
699 
Operating leases, net
   
(12,905)    
(8,850)
Other assets
   
(4,187)    
3,583 
Accounts payable
   
2,668     
(2,884)
Accrued expenses
   
10,733     
(17,264)
Net cash used in operating activities
   
(175,709)    
(192,606)
Cash flows from investing activities:
 
    
   
Purchases of investments
   
(261,709)    
(511,699)
Maturities of investments
   
340,361     
650,883 
Proceeds from sale of the Huntsville manufacturing facility, net
   
65,386     
— 
Purchases of property, plant and equipment
   
(1,468)    
(865)
Sales of property, plant and equipment
   
—     
1,245 
Net cash provided by investing activities
   
142,570     
139,564 
Cash flows from financing activities:
 
    
   
Proceeds from shares issued under equity compensation plans
   
118     
30 
Proceeds from issuance of pre-funded warrant
   
30,000     
— 
Proceeds from sale of future royalties
   
15,000     
— 
Repurchase of common stock from Bristol-Myers Squibb
   
(3,000)    
— 
Net cash provided by financing activities
   
42,118     
30 
Effect of foreign exchange rates on cash and cash equivalents
   
(4)    
62 
Net increase (decrease) in cash and cash equivalents
   
8,975     
(52,950)
Cash and cash equivalents at beginning of year
   
35,277     
88,227 
Cash and cash equivalents at end of year
  $
44,252    $
35,277 
Non-cash investing and financing activities:
 
    
   
Fair value of equity method investment in Gannet BioChem received in exchange for sale of Huntsville 
manufacturing facility
  $
12,218    $
— 
Transaction costs and net working capital adjustment for sale of Huntsville manufacturing facility 
included in accounts payable and accrued expenses
  $
697    $
— 
Supplemental disclosure of cash flow information:
 
    
   
Cash paid for income taxes
  $
76    $
2,656 
 
The accompanying notes are an integral part of these consolidated financial statements.

 
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NEKTAR THERAPEUTICS
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
December 31, 2024
Note 1 — Organization, Summary of Significant Accounting Policies and Key Transactions
Organization
Nektar Therapeutics (Nektar, we) is a clinical stage, research-based drug discovery biopharmaceutical company headquartered in San Francisco, 
California and incorporated in Delaware, focused on discovering and developing innovative medicines in the field of immunotherapy. Within this growing 
field, we direct our efforts toward creating new immunomodulatory agents that selectively induce, amplify, attenuate or prevent immune responses in order 
to achieve desired therapeutic outcomes. Our pipeline of clinical-stage and preclinical-stage immunomodulatory agents targets the treatment of 
autoimmune diseases (e.g. rezpegaldesleukin and NKTR-0165, respectively) and cancer (e.g. NKTR-255). We are conducting Phase 2b trials in 
rezpegaldesleukin in patients with moderate-to-severe atopic dermatitis which we initiated in October 2023 and in patients with severe-to-very severe 
alopecia areata which we initiated in March 2024. We announced on February 24, 2025, that we had entered into a collaboration agreement with TrialNet 
to evaluate rezpegaldesleukin in patients with new onset stage 3 type 1 diabetes mellitus.
Our research and development activities have required significant ongoing investment to date and are expected to continue to require significant 
investment. As a result, we expect to continue to incur substantial losses and negative cash flows from operations in the future. We have financed our 
operations primarily through cash generated from licensing, collaboration and manufacturing agreements and financing transactions. At December 31, 
2024, we had approximately $269.1 million in cash and investments in marketable securities. 
As we continue our research and development activities, we will need additional cash to fund our operations. Accordingly, we may enter into new 
collaboration agreements or other similar transactions, and we may also seek financing transactions, which may include dilutive equity-based financings, 
such as an offering of our common stock. There can be no assurance that any additional collaboration agreements or financings will be available to us on 
commercially reasonable terms. We believe we have sufficient cash and investments in marketable securities to fund operations through at least the next 
twelve months from the date of issuance of these financial statements.
       Sale of Manufacturing Facility 
On December 2, 2024, we completed the sale of our manufacturing facility located in Huntsville, Alabama (the Facility) and certain other 
manufacturing assets related thereto, including the assignment of our existing manufacturing and supply obligations, to Gannet BioChem, an affiliate of 
Ampersand Management LLC d/b/a Ampersand Capital Partners (Ampersand), via an Asset Purchase Agreement (the APA), for consideration of $64.7 
million in cash, net of transaction costs, and an approximate 20% equity ownership at the time of close in Gannet BioChem. See Note 12 for additional 
information. 
Financing Transactions
During the year ended December 31, 2024, we entered into the following transactions: 
•
On February 12, 2024, for total cash consideration paid of $3.0 million, we repurchased from Bristol Myers Squibb Company (BMS) 8.3 
million shares of Nektar’s common stock that were previously sold to BMS, which we report as treasury stock on our Consolidated Balance 
Sheets. See Note 9 for additional information. 
•
On March 4, 2024, we entered into a Securities Purchase Agreement with TCG Crossover Fund II, L.P. (TCG), pursuant to which we issued 
a pre-funded warrant to TCG to purchase 25,000,000 shares of Nektar’s common stock for gross proceeds of $30.0 million (or a purchase 
price of $1.20 per share of common stock that can be issued upon exercise of the pre-funded warrant). On May 28, 2024, we filed with the 
SEC a registration statement on Form S-3 (file no. 333-279760) registering for the resale of up to 25,000,000 shares of Nektar’s common 
stock upon exercise of the pre-funded warrant issued to TCG pursuant to the Securities Purchase Agreement. The registration statement 
became effective on June 5, 2024. See Note 6 for additional information. 
•
On March 4, 2024, for total cash consideration received of $15.0 million, we entered into an amendment (the Amendment) with entities 
managed by Healthcare Royalty Management, LLC (collectively, HCR) to remove the cap on royalties previously sold to HCR under a 
Purchase and Sale Agreement (the 2020 Purchase and Sale Agreement). See Note 5 for additional information.

 
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Results of Clinical Trial Programs and Restructuring Plans
In March and April 2022, we announced that our registrational trials of bempegaldesleukin in combination with Opdivo® under our Strategic 
Collaboration Agreement with BMS (BMS Collaboration Agreement) did not meet their primary endpoints. Based on these results, in April 2022, we 
announced our decision to discontinue all development of bempegaldesleukin and also announced new strategic reorganization and cost restructuring plans 
(together, the 2022 Restructuring Plan), pursuant to which we completed an approximate 70% reduction of our workforce during 2022 and sold our 
research facility in India in December 2022. We also decided to sublease certain of our leased premises in San Francisco, CA, including all of our office 
leased space on Third St. (the Third Street Facility) and portions of our office and laboratory space on Mission Bay Blvd. South (the Mission Bay Facility).
In February 2023, we announced the topline data from the Phase 2 study of rezpegaldesleukin in adult patients with systemic lupus erythematosus 
(SLE) (Phase 2 Lupus Study) under our collaboration agreement with Eli Lilly and Company (Lilly). Lilly subsequently notified us that it did not intend to 
advance rezpegaldesleukin into Phase 3 development for SLE. In April 2023, we announced that we would be regaining the full rights to rezpegaldesleukin 
from Lilly and also announced a new strategic reprioritization and cost restructuring plan (the 2023 Restructuring Plan). Under the 2023 Restructuring 
Plan, we reduced our San Francisco-based workforce by approximately 60%, which was substantially completed by June 2023. In addition, under the 2023 
Restructuring Plan, we decided to sublease our remaining office and laboratory space on Mission Bay Blvd. South which we had not planned to sublease 
pursuant to the 2022 Restructuring Plan.
We have incurred significant costs resulting from the 2022 and 2023 Restructuring Plans. See Note 10 for additional information on the effect of 
these Plans on our Consolidated Financial Statements.
Basis of Presentation, Principles of Consolidation and Use of Estimates
Our Consolidated Financial Statements include the financial position, results of operations and cash flows of our wholly-owned subsidiaries. In 
determining whether we are the primary beneficiary of a variable interest entity (VIE), we consider whether we have both the power to direct activities of 
the entity that most significantly impact the entity’s economic performance and the obligation to absorb losses of, or the right to receive benefits from, the 
entity that could potentially be significant to that entity. We do not have any interests in any variable interest entities of which we are the primary 
beneficiary. We have eliminated all intercompany accounts and transactions in consolidation.
Our Consolidated Financial Statements are denominated in U.S. dollars. Accordingly, changes in exchange rates between the applicable foreign 
currency and the U.S. dollar will affect the translation of each foreign subsidiary’s financial results into U.S. dollars for purposes of reporting our 
consolidated financial results. We include translation gains and losses in accumulated other comprehensive income (loss) in the stockholders’ equity 
section of our Consolidated Balance Sheets. However, if we have concluded that we have substantially liquidated the entity, such as for our subsidiary in 
India, we recognize subsequent translation gains and losses in other income (expense) in our Consolidated Statement of Operations.
Our comprehensive loss consists of our net loss plus our foreign currency translation gains and losses (to the extent recognized in other 
comprehensive income (loss)) and unrealized holding gains and losses on available-for-sale securities. Other than as described in Note 3, there were no 
significant reclassifications out of accumulated other comprehensive loss to the statements of operations for the periods presented.
The preparation of consolidated financial statements in conformity with U.S. generally accepted accounting principles (GAAP) requires 
management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities 
at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. Accounting estimates 
and assumptions are inherently uncertain. Actual results could differ materially from those estimates and assumptions. Our estimates include those related 
to the selling prices of performance obligations and amounts of variable consideration in collaboration agreements, royalty revenue, and other assumptions 
required for revenue recognition as described further below; the net realizable value of inventory; the determination of our ability to exercise control or 
significant influence over our equity method investee; the fair value and impairment of investments in marketable securities, equity method investment, 
goodwill and long-lived assets; contingencies, accrued clinical trial, contract manufacturing and other expenses; income taxes; non-cash royalty revenue 
and non-cash interest expense from our liabilities related to our sales of future royalties; our assumptions used in stock-based compensation; and ongoing 
litigation, among other estimates. We base our estimates on historical experience and on other assumptions, including assumptions as to future events, that 
management believes are reasonable under the circumstances. These estimates form the basis for making judgments about the carrying values of assets and 
liabilities when these values are not readily apparent from other sources. As appropriate, we assess estimates each period, update them to reflect current 
information, and will generally reflect any changes in estimates in the period first identified.

 
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Fair Value Measurements
The recorded amounts of certain financial instruments, including cash and cash equivalents, accounts receivable, accounts payable and accrued 
liabilities approximate their fair values due to their relatively short maturities. We record available-for-sale investments and cash equivalents at their 
estimated fair values, which are based on market prices from a variety of industry standard data providers and generally represent quoted prices for similar 
assets in active markets or have been derived from observable market data.
Certain assets and liabilities are reported on a recurring basis at fair value, and certain assets and liabilities are subsequently adjusted to their fair 
values, in accordance with the fair value hierarchy established in ASC 820-10, Fair Value Measurements and Disclosures (ASC 820). ASC 820 defines fair 
value as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for 
the asset or liability in an orderly transaction between market participants on the measurement date. The fair value hierarchy of ASC Topic 820 requires an 
entity to maximize the use of observable inputs when measuring fair value and classifies those inputs into three levels:
Level 1 — Quoted prices in active markets for identical assets or liabilities.
Level 2 — Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted 
prices for identical or similar assets or liabilities in markets that are not active; or other inputs that are observable or can be corroborated by 
observable market data for substantially the full term of the assets or liabilities. For the years ended December 31, 2024 and 2023, there were no 
transfers between Level 1 and Level 2 of the fair value hierarchy.
Level 3 — Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.
Related Parties
Transactions between related parties are considered to be related party transactions even though they may not be given accounting recognition. 
ASC 850, Related Party Disclosures (ASC 850) requires that transactions with related parties that would make a difference in decision making shall be 
disclosed so that users of the financial statements can evaluate their significance. Please see Note 12 regarding our related party transactions with Gannet 
BioChem.
Cash, Cash Equivalents, and Investments in Marketable Securities
We consider all investments in marketable securities with an original maturity of three months or less when purchased to be cash equivalents. We 
classify investments in securities with remaining maturities of less than one year, or where our intent is to use the investments to fund current operations or 
to make them available for current operations, as short-term investments. We classify investments in securities with remaining maturities of over one year 
as long-term investments.
Our cash and investments are held or issued by financial institutions that management believes are of high credit quality. However, we are 
exposed to credit risk in the event of default by the third parties that hold or issue such assets. Our investment policy limits investments to fixed income 
securities denominated and payable in U.S. dollars such as corporate bonds, corporate commercial paper, U.S. government obligations, and money market 
funds and places restrictions on maturities and concentrations by type and issuer.
For our available-for-sale securities, we have significant concentrations of issuers in the banking and financial services industry. While our 
investment policy requires that we only invest in highly-rated securities and limit our exposure to any single issuer, a variety of factors may materially 
affect the financial condition of issuers. Additionally, pursuant to our investment policy, we may sell securities before maturity if the issuer’s credit rating 
has been downgraded below our minimum credit rating requirements, which may result in a loss on the sale. Accordingly, if factors result in downgrades 
below our minimum credit rating requirements and if we decide to sell these securities, we may experience losses on such sales.
Investments are designated as available-for-sale and are carried at fair value with unrealized gains and losses reported in stockholders’ equity as 
accumulated other comprehensive income (loss). We review our portfolio of available-for-sale debt securities, using both quantitative and qualitative 
factors, to determine if declines in fair value below amortized cost have resulted from a credit-related loss or other factors. If the decline in fair value is due 
to credit-related factors, we recognize a loss in our Consolidated Statement of Operations, whereas if the decline in fair value is not due to credit-related 
factors, we recognize the loss in other comprehensive income (loss).

 
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We include coupon interest on securities classified as available-for-sale, as well as amortization of premiums and accretion of discounts to 
maturity, in interest income. The cost of securities sold is based on the specific identification method.
Accounts Receivable and Significant Customer Concentrations
Our customers are primarily pharmaceutical and biotechnology companies with whom we have multi-year arrangements. Our accounts receivable 
balance contains billed and unbilled trade receivables from product sales, milestones (to the extent that they have been achieved and are due from the 
counterparty), other contingent payments, as well as reimbursable costs from collaborative research and development agreements. We perform regular 
reviews of our partners’ credit risk and payment histories when circumstances warrant, including payments made subsequent to year-end. When 
appropriate, we provide for an allowance for doubtful accounts by reserving for specifically identified doubtful accounts, although historically we have not 
experienced credit losses from our accounts receivable. We have not recorded provisions for credit losses for any of the periods presented. Accounts 
receivable at December 31, 2024 are immaterial due to the sale of the Facility. 
Inventory and Significant Supplier Concentrations
Before the sale of Facility, we generally manufactured inventory upon receipt of firm purchase orders from our partners, and we may have 
manufactured certain intermediate work-in-process materials and purchased raw materials based on purchase forecasts from our partners. Inventory 
included direct materials, direct labor, and manufacturing overhead, and we determined cost on a first-in, first-out basis for raw materials and on a specific 
identification basis for work-in-process and finished goods. We valued inventory at the lower of cost or net realizable value, and we wrote down defective 
or excess inventory to net realizable value based on historical experience or projected usage. We expensed inventory related to our research and 
development activities when we purchased or manufactured it. We have no inventory balance at December 31, 2024 due to the sale of the Facility. 
We are dependent on our suppliers and contract manufacturers to provide raw materials and drugs of appropriate quality and reliability and to 
meet applicable contract and regulatory requirements. In certain cases, we rely on single sources of supply of one or more critical materials. As a result of 
the sale of the Facility, we are dependent on Gannet BioChem for the supply of the polyethylene glycol reagents (PEG reagents) used in the manufacture of 
rezpegaldesleukin and NKTR-255. Consequently, in the event that supplies are delayed or interrupted for any reason, our ability to develop and produce 
our drug candidates could be significantly impaired, which could have a material adverse effect on our business, financial condition and results of 
operations. 
Restructuring
We recognize restructuring charges related to reorganization plans that have been committed to by management when liabilities have been 
incurred. In connection with these activities, we record restructuring charges at fair value for:
•
contractual employee termination benefits provided that the obligations result from services already rendered based on vested rights to 
such benefits when the payment of benefits becomes probable and the amount can be reasonably estimated;
•
one-time employee termination benefits on the communication date from management to the employees provided that management has 
committed to a plan of termination, the plan identifies the employees and their expected termination dates, the details of termination 
benefits are complete, and it is unlikely that changes to the plan will be made or the plan will be withdrawn;
•
contract termination costs when we cancel the contract in accordance with its terms, or for costs to be incurred over the remaining 
contract term without economic benefit to us at the cease-use date.
For one-time employee termination benefits, we recognize the liability in full on the communication date when future services are not required or 
amortize the liability ratably over the service period, if required. The fair value of termination benefits reflects our estimates of expected utilization of 
certain Company-funded post-employment benefits.
See Note 10 for additional information on the severance expense that we recognized for employees terminated in connection with our reductions-
in-force.

 
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Goodwill
 Goodwill represents the excess of the price paid for another entity over the fair value of the assets acquired and liabilities assumed in a business 
combination. We are organized in one reporting unit and evaluated the goodwill for the Company as a whole. Goodwill has an indefinite useful life and is 
not amortized, but instead tested for impairment.
Goodwill is assessed for impairment on an annual basis and whenever events and circumstances indicate that it may be impaired. Factors that 
may indicate potential impairment and trigger an impairment test include, but are not limited to, current economic, market and geopolitical conditions, 
including a significant, sustained decline in our stock price and market capitalization compared to the net book value; an adverse change in legal factors, 
business climate or operational performance of the business; or significant changes in the ability of the reporting unit to generate positive cash flows for our 
strategic business objectives. If the carrying value of the reporting unit, including goodwill, exceeds the reporting unit’s fair value, we will recognize a 
goodwill impairment loss, and we will write down goodwill such that the carrying value of the reporting unit equals its fair value, provided that we cannot 
reduce goodwill below zero.
See Note 11 for additional information regarding the goodwill impairment charges we recorded during the year ended December 31, 2023.
Long-Lived Assets
We report property, plant and equipment at cost, net of accumulated depreciation. We capitalize major improvements and expense maintenance 
and repairs as incurred. We generally recognize depreciation on a straight-line basis. We depreciate manufacturing, laboratory and other equipment over 
their estimated useful lives of generally three to ten years, depreciate buildings over the estimated useful life of generally twenty years and amortize 
leasehold improvements over the shorter of the estimated useful lives or the remaining term of the related lease.
We assess the impairment of long-lived assets whenever events or changes in business circumstances indicate that the carrying amounts of the 
assets may not be fully recoverable. In the case of property, plant and equipment and right-of-use assets for our leases, we determine whether there has 
been an impairment by comparing the carrying value of the asset to the anticipated undiscounted net cash flows associated with the asset. If such cash flows
are less than the carrying value, we write down the asset to its fair value, which may be measured as anticipated net cash flows associated with the asset, 
discounted at a rate that we believe a market participant would utilize to reflect the risks associated with the cash flows, such as credit risk.
See Note 10 for additional information regarding the impairment charges we recorded for our leased facilities and certain property and equipment.
Leases
We determine if an arrangement contains a lease at the inception of the arrangement. Right-of-use assets represent our right to use an underlying 
asset for the lease term, and lease liabilities represent our obligation to make lease payments arising from the lease. We recognize operating lease right-of-
use assets and liabilities at the lease commencement date based on the present value of lease payments over the expected lease term. In determining the 
present value of lease payments, we use our incremental borrowing rate based on the information available at the lease commencement date. Our expected 
lease terms may include options to extend or terminate the lease when it is reasonably certain that we will exercise any such options. We have elected to 
recognize lease incentives, such as tenant improvement allowances, at the lease commencement date as a reduction of the right-of-use asset and lease 
liability until paid to us by the lessor to the extent that the lease provides a specified fixed or maximum level of reimbursement and we are reasonably 
certain to incur reimbursable costs at least equaling such amounts.
We have elected the practical expedient to account for the lease and non-lease components, such as common area maintenance charges, as a single 
lease component for our facilities leases, and elected the short-term lease recognition exemption for our short-term leases, under which we do not recognize 
lease liabilities and right-of-use assets for leases with an original term of twelve months or less.
We recognize lease expense for our operating leases on a straight-line basis over the expected lease term. However, if we recognize an impairment 
of our right-of-use assets, the subsequent lease expense of such lease is recognized on an accelerated basis as it includes the recognition of accretion 
expense on our lease liability, which is higher in earlier periods due to the higher lease liability, and straight-line amortization of the remaining post-
impairment right-of-use asset. 
Please see Note 4 for additional information regarding our leases.

 
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Collaborative Arrangements
We enter into collaboration arrangements with pharmaceutical and biotechnology collaboration partners, under which we may grant licenses to our 
collaboration partners to further develop and commercialize one of our drug candidates, either alone or in combination with the collaboration partners’ 
compounds. We may also perform research, development, manufacturing and supply activities under our collaboration agreements. Consideration under 
these contracts may include an upfront payment, development and regulatory milestones and other contingent payments, expense reimbursements, royalties 
based on net sales of approved drugs, and commercial sales milestone payments. Additionally, these contracts may provide options for the customer to 
purchase additional contract research and development services under separate contracts.
When we enter into collaboration agreements, we assess whether the arrangements fall within the scope of ASC 808, Collaborative Arrangements 
(ASC 808) based on whether the arrangements involve joint operating activities and whether both parties have active participation in the arrangement and 
are exposed to significant risks and rewards of the arrangement. To the extent that the arrangement falls within the scope of ASC 808, we assess whether 
the payments between us and our collaboration partner fall within the scope of other accounting literature. If we conclude that payments from the 
collaboration partner to us represent consideration from a customer, such as license fees and contract research and development activities, we account for 
those payments within the scope of ASC 606, Revenue from Contracts with Customers (ASC 606). However, if we conclude that our collaboration partner 
is not a customer for certain activities and associated payments, such as for certain collaborative research, development, manufacturing and commercial 
activities, we present such payments as a reduction of research and development expense or general and administrative expense, based on where we present 
the underlying expense.
Revenue Recognition
For elements of those arrangements that we determine should be accounted for under ASC 606, we assess which activities in our collaboration 
agreements are performance obligations that should be accounted for separately and determine the transaction price of the arrangement, which includes the 
assessment of the probability of achievement of future milestones and other potential consideration. For arrangements that include multiple performance 
obligations, such as granting a license or performing contract research and development activities or participation on joint steering or other committees, we 
allocate upfront and milestone payments under a relative standalone selling price method. Accordingly, we develop assumptions that require judgment to 
determine the standalone selling price for each performance obligation identified in the contract. These key assumptions may include revenue forecasts, 
clinical development timelines and costs, discount rates and probabilities of clinical and regulatory success.
Product sales
Product sales were primarily derived from manufacturing and supply agreements we entered into with our customers. We have assessed our 
manufacturing and supply arrangements and have generally determined that they provided the customer an option to purchase our proprietary PEG 
reagents. Accordingly, we treated each purchase order as a discrete exercise of the customer’s option (i.e. a separate contract) rather than as a component of 
the overall arrangement. The pricing for the manufacturing and supply is generally at a fixed price and may be subject to annual producer price index (PPI) 
adjustments. The “take or pay” arrangement signed with UCB during 2024 resulted in recognition based on a single sales price over multiple years. See 
Note 9 for additional details.
We invoiced and recognized product sales when title and risk of loss passed to the customer, which generally occurs upon shipment. Customer 
payments are generally due 30 days from receipt of an invoice. We tested our products for adherence to technical specifications before shipment; 
accordingly, we have not experienced any significant returns from our customers. We recognize costs related to shipping and handling of product to 
customers in cost of goods sold.
As a result of the sale of the Facility, we no longer recognize product sales of PEG reagents.
Non-cash royalty revenue
Generally, for our collaboration arrangements that include sales-based royalties, we have granted our collaboration partner a license to our 
intellectual property. Pursuant to these arrangements, our collaboration partners are typically obligated to pay a royalty that is based on the net sales of their 
approved drugs that are sold in the countries where we have intellectual property rights covering their drugs. We have sold our rights to receive sales-based 
royalties for CIMZIA®, MIRCERA®, MOVANTIK®, ADYNOVATE® and REBINYN® as further described in Note 5. For collaboration arrangements that 
include sales-based royalties, we have concluded that the license is the predominant item to which the royalties relate, which include commercial milestone 
payments based on the level of sales. Accordingly, we recognize royalty revenue when the underlying sales occur based on our best estimates of sales of 
the drugs. Our aggregate non-cash 

 
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royalty revenue of $64.3 million and $68.9 million for the years ended December 31, 2024 and 2023, respectively, represents revenue for granting licenses 
for which we had satisfied in prior periods.
License, collaboration and other revenue
License Grants: For collaboration arrangements that include a grant of a license to our intellectual property, we consider whether the license grant 
is distinct from the other performance obligations included in the arrangement. Generally, we would conclude that the license is distinct if the customer is 
able to benefit from the license with the resources available to it. For licenses that are distinct, we recognize revenues from nonrefundable, upfront 
payments and other consideration allocated to the license when the license term has begun and we have provided all necessary information regarding the 
underlying intellectual property to the customer, which generally occurs at or near the inception of the arrangement.
Milestone Payments: At the inception of the arrangement and at each reporting date thereafter, we assess whether we should include any milestone 
payments or other forms of variable consideration in the transaction price, based on whether a significant reversal of revenue previously recognized is not 
probable upon resolution of the uncertainty. Since milestone payments may become payable to us upon the initiation of a clinical study, filing for or receipt 
of regulatory approval or the first commercial sale of a product, we review the relevant facts and circumstances to determine when we should update the 
transaction price, which may occur before the triggering event. When we do update the transaction price for milestone payments, we allocate it on a relative 
standalone selling price basis and record revenue on a cumulative catch-up basis, which results in recognizing revenue for previously satisfied performance 
obligations in such period. If we update the transaction price before the triggering event, we recognize the increase in the transaction price as a contract 
asset. Our partners generally pay development milestones subsequent to achievement of the triggering event.
Research and Development Services: For amounts allocated to our research and development obligations in a collaboration arrangement, we 
recognize revenue over time using a proportional performance model, representing the transfer of goods or services as we perform activities over the term 
of the agreement.
Research and Development Expense
Research and development costs are expensed as incurred and include salaries, benefits and other operating costs such as outside services, supplies 
and allocated overhead costs. We perform research and development activities for our drug candidates and technology development and for certain third 
parties under collaboration agreements. For our drug candidates and our internal technology development programs, we invest our own funds without 
reimbursement from a third party. Where we perform research and development activities under a joint development collaboration, such as our 
collaboration with BMS, we record the cost reimbursement from our partner as a reduction to research and development expense when reimbursement 
amounts are due to us under the agreement.
We record an accrued expense for the estimated unbilled costs of our clinical study activities performed by third parties. The financial terms of 
these agreements are subject to negotiation, vary from contract to contract and may result in uneven payment flows to our vendors. Payments under the 
contracts depend on factors such as the achievement of certain events, successful enrollment of patients and completion of certain clinical trial activities. 
We generally recognize costs associated with the start-up and reporting phases of the clinical trials as incurred. We generally accrue costs associated with 
the treatment phase of clinical trials based on the estimated activities performed by our third-party vendors, including our contract research organizations. 
In specific circumstances, such as for certain time-based costs, we recognize clinical trial expenses ratably over the service period, as we believe that this 
methodology may be more reflective of the timing of costs incurred.
We capitalize advance payments for goods or services that will be used or rendered for future research and development activities and recognize 
expense as the related goods are delivered or services performed. 
Restructuring and Impairment
Amounts recorded as restructuring and impairment for the years ended December 31, 2024 and 2023 relate to the 2022 and 2023 Restructuring 
Plans. See Note 10 for additional information.
Non-cash Interest Expense on Liabilities Related to the Sales of Future Royalties
Interest expense on liabilities related to the sales of future royalties is imputed on the unamortized portion using the effective interest method. We 
periodically assess the estimated royalty payments under our licensees, and, as the amount or timing of such payments of these estimates change, we 
prospectively adjust the imputed interest rate and the related amortization of the respective liability. The actual interest rate will be affected by the timing of 
the royalty payments and changes in the forecasted revenue.

 
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Equity Method Investment
Our investment in Gannet BioChem is considered a VIE for which we are not the primary beneficiary. We use the equity method of accounting to 
account for our investment in Gannet BioChem, which is an entity that we do not control, but have the ability to exert significant influence. Judgments 
regarding the level of influence over the equity method investment include consideration of key factors such as our ownership interest, representation on 
the board of directors or participation in policy-making decisions.  
Under the equity method of accounting, our investment in Gannet BioChem is initially recorded at fair value on our Consolidated Balance Sheets. 
We include our share of the net income or loss of the entity in non-operating income (expense), which results in an increase or decrease to the carrying 
value of the investment. Our share of Gannet BioChem’s gains and losses may reflect Ampersand’s liquidation preferences, including its right to a 
cumulative preferred dividend, as further disclosed in Note 12, and we will record our share of the equity method investment’s results of operation on a lag 
basis. Our maximum exposure to loss in Gannet BioChem is limited to the value of our investment. No income or loss from our investment in Gannet 
BioChem has been recorded for the year ended December 31, 2024. The amount not recognized for the month ended December 31, 2024, is immaterial.
We evaluate our equity method investments at the end of each reporting period to determine whether events or changes in business circumstances 
indicate that the carrying value of the investments may not be recoverable. This evaluation consists of several qualitative and quantitative factors that may 
include recent financial results, projected financial results and operating trends of the investees and other publicly available information that may affect the 
value of our investments.
Stock-Based Compensation
Stock-based compensation arrangements include grants of stock options, restricted stock units (RSUs), performance stock units (PSUs) under our 
equity incentive plans, as well as shares issued under our Employee Stock Purchase Plan (ESPP), through which employees may purchase our common 
stock at a discount to the market price.
We expense the grant date fair value of stock-based compensation on a straight-line basis over the requisite service periods in our Consolidated 
Statements of Operations and recognize forfeitures as they occur. For options and RSUs that vest upon the achievement of performance milestones, we 
recognize expense provided that we believe that the performance milestones are probable of achievement, and we estimate the vesting period based on our 
evaluation of the estimated date of achievement of these milestones. For PSUs, we recognize expense based on the grant date fair value regardless of 
whether the market condition is met. The number of shares issuable under PSUs is based on our total shareholder return as compared to other companies 
within the NASDAQ biotechnology index over the measurement period and may be capped based on our absolute total shareholder return over such period. 
We report expense amounts in cost of goods sold, research and development expense, and general and administrative expense based on the function of the 
applicable employee. We estimate the grant date fair value of our stock-based compensation awards as follows:
•
Stock options - We use the Black-Scholes option pricing model for the respective grant to determine the grant date fair value of stock 
options and common stock issued under the Company’s equity incentive plans or purchased under the ESPP. The Black-Scholes option 
pricing model requires the input of assumptions, including but not limited to, our stock price volatility over the term of the awards, and 
actual and projected employee stock option exercise behaviors.
•
PSUs - We use the Monte Carlo simulation model to determine the grant date fair value of PSUs. The Monte Carlo simulation model 
incorporates assumptions such as the volatility of our stock, the volatility of the stock of other peer companies within the index, and the 
correlation of both our stock and our peer companies’ stock to the index.
•
RSUs - The fair value of an RSU is equal to the closing price of our common stock on the grant date.
Income Taxes
We account for income taxes under the liability method. Under this method, we determine deferred tax assets and liabilities based on differences 
between the financial reporting and tax reporting bases of assets and liabilities, measured using enacted tax rates and laws that we expect to be in effect 
when we expect the differences to reverse. Realization of deferred tax assets is dependent upon future earnings, the timing and amount of which are 
uncertain. We record a valuation allowance against deferred tax assets to reduce their carrying value to an amount that is more likely than not to be 
realized. When we establish or reduce the valuation allowance related to the deferred tax assets, our provision for income taxes will increase or decrease, 
respectively, in the period we make such determination.

 
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We utilize a two-step approach to recognize and measure uncertain tax positions. The first step is to evaluate the tax position for recognition by 
determining if the weight of available evidence indicates that it is more likely than not that the position will be sustained upon tax authority examination, 
including resolution of related appeals or litigation processes, if any. The second step is to measure the tax benefit as the largest amount of benefit, 
determined on a cumulative probability basis, that is more than 50% likely of being realized upon ultimate settlement.
For the years ended December 31, 2024 and 2023, our income tax benefit was immaterial. As a result of the 2022 Restructuring Plan and our 
intent to wind down our foreign subsidiaries, during 2022, we recorded a provision for the repatriation of accumulated earnings and profits from India.
Net Loss Per Share
For all periods presented in the Consolidated Statements of Operations, the net loss available to common stockholders is equal to the reported net 
loss. We calculate basic net loss per share based on the weighted-average number of common shares outstanding, including the pre-funded warrant, during 
the periods presented. Shares of common stock into which the pre-funded warrant may be exercised are considered outstanding for the purposes of 
computing basic net loss per share because the shares may be issued for little or no consideration, are fully vested and are exercisable after the original 
issuance date. For the years ended December 31, 2024 and 2023, basic and diluted net loss per share are the same due to our net losses and the requirement 
to exclude potentially dilutive securities which would have an antidilutive effect on net loss per share. We excluded shares underlying the weighted average 
outstanding stock options, RSUs and PSUs, which totaled 26.8 million and 20.4 million for the years ended December 31, 2024 and 2023, respectively.
Comprehensive Loss
Comprehensive loss is the change in stockholders’ equity from transactions and other events and circumstances other than those resulting from 
investments by stockholders and distributions to stockholders. Our comprehensive loss includes our net loss, gains and losses from the foreign currency 
translation of the assets and liabilities of our foreign subsidiaries, and unrealized gains and losses on investments in available-for-sale securities.
Recent Accounting Pronouncements
In November 2023, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2023-07, Segment Reporting 
(Topic 280): Improvements to Reportable Segment Disclosures, which requires disclosure of incremental segment information on an annual and interim 
basis for all public entities. The amendments do not change how a public entity identifies its operating segments, aggregates those operating segments, or 
applies the quantitative thresholds to determine its reportable segments. ASU 2023-07 is effective for annual reporting beginning with the fiscal year 
ending December 31, 2024, and for interim periods thereafter. We adopted the fiscal year standard for the period beginning January 1, 2024 on a 
retrospective basis which resulted in updated segment disclosures. For more information on the updated segment disclosures, refer to Note 15.
In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which will require 
incremental income tax disclosures on an annual basis for all public entities. The amendments require that public business entities disclose specific 
categories in the rate reconciliation and provide additional information for reconciling items meeting a quantitative threshold. The amendments also require 
disclosure of income taxes paid to be disaggregated by jurisdiction, and disclosure of income tax expense disaggregated by federal, state, and foreign. ASU 
2023-09 is effective for annual reporting beginning with the fiscal year ending December 31, 2025. We are currently evaluating the incremental disclosures 
that will be required in our consolidated financial statements.
In November 2024, the FASB issued ASU No. 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation 
Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses, an accounting standard update that requires the Company to disclose more 
detailed information about the types of expenses (including employee compensation, depreciation, and amortization) included in each relevant income 
statement expense caption. The ASU is effective for fiscal years beginning after December 15, 2026, and interim reporting periods beginning after 
December 15, 2027. Early adoption is permitted. We are currently evaluating the incremental disclosures that will be required in our consolidated financial 
statements.

 
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Note 2 — Cash and Investments in Marketable Securities
Cash and investments in marketable securities, including cash equivalents, are as follows (in thousands):
 
 
 
Estimated Fair Value at
 
 
 
December 31,
   
December 31,
 
 
 
2024
   
2023
 
Cash and cash equivalents
 $
44,252 
 $
35,277 
Short-term investments
  
210,974 
  
268,339 
Long-term investments
  
13,869 
  
25,825 
Total cash and investments in marketable securities
 $
269,095 
 $
329,441 
 
We invest in liquid, high quality debt securities. Our investments in debt securities are subject to interest rate risk. To minimize the exposure due 
to an adverse shift in interest rates, we invest in securities with maturities of two years or less and maintain a weighted average maturity of one year or less. 
All of our long-term investments as of December 31, 2024 had maturities between one and two years. We currently do not intend to sell these securities 
prior to maturity and it is more likely than not that we will not be required to sell these securities before we recover the amortized cost basis.
During the years ended December 31, 2024 and 2023, we did not sell any available-for-sale securities.
We report our accrued interest receivable, which totaled $1.1 million and $0.5 million at December 31, 2024 and December 31, 2023, 
respectively, in other current assets on our Consolidated Balance Sheets.
Our portfolio of cash and investments in marketable securities includes (in thousands):
 
 
 
 
 
 
   
December 31, 2024
    December 31, 2023  
 
 
Fair Value

Hierarchy

Level
 
Amortized Cost
   
Gross Unrealized 

Gains
   
Gross Unrealized

Losses
   
Fair Value
   
Fair Value
 
Corporate notes and bonds
 
2
  $
109,678    $
100    $
(67)  $
109,711   $
38,882 
Corporate commercial paper
 
2
  
119,540     
58     
(56)   
119,542    
255,241 
Available-for-sale investments
 
 
  
229,218    
158    
(123)   
229,253    
294,123 
Money market funds
 
1
 
     
     
      
15,993    
2,359 
Certificates of deposit
 
2
 
      
    
     
14,027    
15,116 
Cash
 
N/A
 
      
    
     
9,822    
17,843 
Total cash and investments in marketable 
securities
 
 
  
   
     
     $
269,095   $
329,441 
 
At December 31, 2023, our gross unrealized gains and losses were insignificant. As of December 31, 2024 and 2023, we assessed our marketable 
securities with unrealized losses and concluded that the losses were not attributable to credit. As of December 31, 2024, we had 39 investments in 
unrealized loss positions and no investments had been in continuous unrealized loss positions for 12 months or longer. Accordingly, we have not recorded 
an allowance for credit losses for these securities.
At both December 31, 2024 and 2023, we had letter of credit arrangements in favor of our landlords and certain vendors totaling $7.5 million and 
$7.5 million, respectively. These letters of credit are secured by investments of similar amounts.
Note 3 — Consolidated Financial Statement Details
Inventory
Inventory consists of the following (in thousands):
 
 
December 31,
 
 
 
2024
   
2023
 
Raw materials
  $
—    $
1,861 
Work-in-process
   
—     
12,880 
Finished goods
   
—     
1,360 
Total inventory
  $
—    $
16,101 
 

 
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For the year ended December 31, 2023, we recorded a provision of $2.0 million for the net realizable value of our batches as an increase to cost of 
goods sold. Our manufacturing agreement with UCB Pharma (UCB) for the reagent used in the manufacture of CIMZIA® provided for a fixed selling price 
which we had negotiated in exchange for a higher royalty rate. Accordingly, when evaluating the net realizable value of our inventory for UCB, we 
included the negotiated increase of the royalties in our analysis, and the aggregate revenue has historically been greater than our manufacturing cost. Due to 
the decreases in the royalty rates for 2024 as a result of a settlement agreement with UCB, the aggregate revenue was expected to be less than our 
manufacturing cost for these years, and therefore we previously recorded a provision for net realizable value. As further disclosed in Note 9, on July 31, 
2024, we entered into a long-term supply agreement with UCB that increases the selling price of the reagent used in the manufacture of CIMZIA®, which 
resulted in the aggregate revenue exceeding our manufacturing costs. As a result, we reduced the provision to $0 during the three months ended September 
30, 2024.  See Note 9 for additional information on the settlement agreement with UCB.
As of December 2, 2024, we sold all of our inventory to Gannet BioChem.
Other Current Assets
Other current assets consists of the following (in thousands):
 
 
December 31,
 
 
 
2024
   
2023
 
Prepaid research and development expenses
  $
1,947    $
4,325 
Interest and other non-trade receivables
   
1,609     
1,047 
Other prepaid expenses
   
2,510     
4,407 
Total other current assets
  $
6,066    $
9,779 
 
Property, Plant and Equipment
Property, plant and equipment consists of the following (in thousands):
 
 
December 31,
 
 
 
2024
   
2023
 
Building and leasehold improvements
 
$
3,881   $
43,184 
Laboratory equipment
 
 
552    
14,537 
Computer equipment and software
 
 
14,616    
22,438 
Manufacturing equipment
 
 
—    
24,315 
Furniture, fixtures, and other
 
 
27    
541 
Depreciable property, plant and equipment at cost
 
 
19,076    
105,015 
Less: accumulated depreciation
 
 
(15,910)   
(86,898)
Depreciable property, plant and equipment, net
 
 
3,166    
18,117 
Construction-in-progress
 
 
245    
739 
Property, plant and equipment, net
  $
3,411   $
18,856 
 
Laboratory and manufacturing equipment, including construction-in-process, include assets that support both our manufacturing and research and 
development activities.
 
On December 2, 2024, we sold the Facility, including buildings and the Facility’s associated manufacturing equipment, laboratory equipment and 
computer equipment and software, to Gannet BioChem. 
Due to the weakening lease markets, during the years ended December 31, 2024 and 2023, we have recorded non-cash impairment charges on our 
lease-related property, plant and equipment, primarily for our leasehold improvements, including $1.0 million during the three months ended June 30, 
2024, which we report in restructuring and impairment in our Consolidated Statement of Operations. See Note 10 for additional information.
Depreciation and amortization expense for property, plant and equipment for the years ended December 31, 2024 and 2023 totaled $4.1 million 
and $7.0 million, respectively.

 
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Goodwill
The following is a reconciliation of the change in our goodwill for the year ended December 31, 2023 (in thousands):
 
 
Year Ended

December 31, 2023
 
Goodwill – beginning balance
 
$
76,501 
Impairment of goodwill
 
 
(76,501)
Goodwill – ending balance
 
$
— 
 
As a result of the decrease in the fair value of our single reporting unit during the three months ended March 31, 2023, we recorded a non-cash 
goodwill impairment charge of $76.5 million, which we report as impairment of goodwill in our Consolidated Statement of Operations. We had previously 
recognized goodwill primarily from our acquisitions of Shearwater Corp. and Aerogen, Inc. in 2001 and 2005, respectively. See Note 11 for additional 
information.
Accrued Expenses
Accrued expenses consist of the following (in thousands):
 
 
December 31,
 
 
 
2024
   
2023
 
Accrued compensation
  $
2,832    $
5,553 
Accrued research and development expenses
   
14,453     
10,118 
Accrued contract termination costs
   
2,767     
3,020 
Other accrued expenses
   
9,920     
3,471 
Total accrued expenses
  $
29,972    $
22,162 
Accumulated Other Comprehensive Income (Loss)
The following table summarizes the changes in accumulated other comprehensive income (loss) by component (in thousands): 
 
 
Foreign currency 
translation
   
Available-for-sale 
securities
   
Accumulated Other 
Comprehensive 
Income (Loss)
 
Balance at December 31, 2022
  $
(5,131)   $
(1,776)   $
(6,907)
Foreign currency translation gain (loss)
   
62     
—     
62 
Unrealized gain on available-for-sale securities
   
—     
1,826     
1,826 
Reclassification adjustments to income
   
5,099     
—     
5,099 
Balance at December 31, 2023
   
30     
50     
80 
Foreign currency translation gain (loss)
   
(4)    
—     
(4)
Unrealized gain on available-for-sale securities
   
—     
(15)    
(15)
Balance at December 31, 2024
  $
26    $
35    $
61 
The reclassification from accumulated other comprehensive loss relates to the closure of the operations of our foreign subsidiaries and has been 
included within other income (expense), net in our Consolidated Statement of Operations for the year ended December 31, 2023.
Note 4 — Operating Leases
Our leases consist of a Lease Agreement (the Mission Bay Lease) with ARE-San Francisco No. 19, LLC (ARE) for our 155,215 square foot 
corporate office and R&D facility located at 455 Mission Bay Boulevard South, San Francisco, California (the Mission Bay Facility) and a Lease 
Agreement (the Third Street Lease) with Kilroy Realty Finance Partnership, L.P. (Kilroy) for an additional 135,936 square foot of office space at 360 Third 
Street, San Francisco, California (the Third Street Facility). Both leases terminate on January 31, 2030, subject to two consecutive five year renewal 
options for the Mission Bay Facility and one five year renewal option for the Third Street Facility. Other key terms include the following:
 
•
The monthly base rent for both facilities will escalate over the term of the lease at various intervals.
•
Both leases include various covenants, indemnities, defaults, termination rights, letters of credit and other provisions customary for lease 
transactions of this nature.

 
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•
During the term of the Mission Bay Lease, we are responsible for paying our share of operating expenses specified in the lease, including 
utilities, common area maintenance, insurance costs and taxes.
•
For the Third Street Lease, our fixed annual base rent on an industrial gross lease basis includes certain expenses and property taxes paid 
directly by the landlord.
Due to our 2022 and 2023 Restructuring Plans, during the years ended December 31, 2024, and December 31, 2023, we recorded impairment 
charges of $7.3 million and $30.6 million, respectively, for our right-of-use assets which we are seeking to sublease. See Note 10 for additional 
information.
We generally recognize lease expense for our operating leases on a straight-line basis over the lease term. For spaces where we have recognized an 
impairment charge, the aggregate lease expense recognized over the remaining term is reduced by the amount of the impairment charge, but we recognize 
the remaining lease expense on an accelerated basis. The components of lease expense, which we include in operating expenses in our Consolidated 
Statements of Operations, were as follows (in thousands):
 
 
 
Year Ended December 31,
 
 
 
2024
   
2023
 
Operating lease expense
 
$
8,723   
$
12,116 
Variable lease expense
 
 
9,000   
 
7,027 
Total lease expense
 
$
17,723   
$
19,143 
 
During the years ended December 31, 2024 and 2023, we paid $21.6 million and $21.0 million, respectively, of operating lease payments related 
to our lease liabilities, which we include in net cash used in operating activities in our Consolidated Statements of Cash Flows.
As of December 31, 2024, the maturities of our operating lease liabilities were as follows (in thousands):
 
Year ending December 31,
 
 
 
2025
 
$
20,450 
2026
 
 
22,958 
2027
 
 
23,682 
2028
 
 
24,427 
2029
 
 
25,195 
2030 and thereafter
 
 
2,108 
Total lease payments
 
 
118,820 
Less: portion representing interest
 
 
(16,256)
Operating lease liabilities
 
 
102,564 
Less: current portion
 
 
(19,868)
Operating lease liabilities, less current portion
 
$
82,696 
 
As of December 31, 2024, the weighted-average remaining lease term is 5.1 years and the weighted-average discount rate was 5.8%.
We have entered into subleases for approximately 29,000 square feet of space in our Mission Bay Facility that provide for fixed lease payments, as 
well as full recovery of the subtenants’ share of operating expenses under our master lease agreement, subject to certain free rent periods. We record the 
total sublease income as a reduction of general and administrative expense, which totaled $3.2 million and $2.2 million for the years ended December 31, 
2024 and December 31, 2023, respectively.

 
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As of December 31, 2024, maturities of our operating lease receivables from subleases for each of the next five years and thereafter were as 
follows:
 
Year ending December 31,
 
 
 
2025
 
$
1,480 
2026
 
 
1,670 
2027
 
 
1,729 
2028
 
 
1,788 
2029
 
 
1,846 
2030 and thereafter
 
 
— 
Gross Lease Receivable
 
$
8,513 
 
Note 5 — Liabilities Related to the Sales of Future Royalties
On February 24, 2012, we entered into a purchase and sale agreement (the 2012 Purchase and Sale Agreement) with RPI Finance Trust (RPI), an 
affiliate of Royalty Pharma, pursuant to which we sold, and RPI purchased, our right to receive royalty payments (the 2012 Transaction Royalties) arising 
from the worldwide net sales, from and after January 1, 2012, of (a) CIMZIA®, under our license, manufacturing and supply agreement with UCB, and (b) 
MIRCERA®, under our license, manufacturing and supply agreement with F. Hoffmann-La Roche Ltd and Hoffmann-La Roche Inc. (together referred to 
as Roche). We received aggregate cash proceeds of $124.0 million for the 2012 Transaction Royalties. Although we sold all of our rights to receive 
royalties from the CIMZIA® and MIRCERA® products, as a result of our ongoing manufacturing and supply obligations related to the generation of these 
royalties, we continue to account for these royalties as revenue. We recorded the $124.0 million in proceeds from this transaction as a liability (the 2012 
Royalty Obligation) that is amortized using the effective interest method over the estimated life of the 2012 Purchase and Sale Agreement as royalties from 
the CIMZIA® and MIRCERA® products are remitted directly to RPI.
We were required to pay RPI an aggregate $10.0 million as a result of worldwide net sales of MIRCERA® during the years 2013 and 2012 not 
reaching certain minimum thresholds. The 2012 Purchase and Sale Agreement does not include any other potential payments related to minimum net sales 
thresholds.
On June 5, 2020, UCB served notice of a Declaratory Judgment of Patent Invalidity, filed in the United States District Court for the District of 
Delaware, seeking a declaration of invalidity of certain of our patents that we had licensed to UCB and pursued similar actions in other jurisdictions. On 
October 14, 2021, RPI and we entered into a Letter Agreement which permitted us to enter into a Settlement Agreement, effective October 13, 2021, with 
UCB to effect the negotiation between RPI and UCB in which UCB and RPI agreed to a reduction in the royalty term and annual decreases in the royalty 
rate over the remaining royalty term in exchange for UCB’s withdrawal of all of UCB’s litigation and challenges.
We concluded that we should account for the decrease in royalty payments to RPI as a result of these agreements as a modification of our liability. 
Due to the significance of the change in the estimated royalty payments, we concluded that we should treat the modification as an extinguishment of the 
prior liability and recognize a new liability based on the revised royalty payments and term, discounted to fair value. Accordingly, we estimated the fair 
value to be approximately $84.7 million. As a result, we recognized a non-cash loss of $23.5 million on the revaluation of the prior liability in the three 
months ended December 31, 2021, and we wrote off the remaining $0.9 million of unamortized transaction costs. 
On December 16, 2020, we entered into a purchase and sale agreement (the 2020 Purchase and Sale Agreement) with entities managed by 
Healthcare Royalty Management, LLC (collectively, HCR). Pursuant to the 2020 Purchase and Sale Agreement, we agreed to sell to HCR certain of our 
rights to receive royalty payments (the 2020 Transaction Royalties) arising from the worldwide net sales, from and after October 1, 2020 until such time 
that certain return thresholds are met as described below, of (a) MOVANTIK® under that certain License Agreement, dated September 20, 2009, by and 
between Nektar and AstraZeneca AB, as amended, (b) ADYNOVATE® under that certain Exclusive Research, Development, License and Manufacturing 
and Supply Agreement, dated September 26, 2005, by and among Nektar, Baxalta US Inc. and Baxalta GmbH, as amended, (c) REBINYN® under that 
certain Settlement and License Agreement, dated December 21, 2016, by and among Nektar, Novo Nordisk Inc., Novo Nordisk A/S and Novo Nordisk 
A/G and (d) licensed products under that certain Right to Sublicense Agreement, dated October 27, 2017, by and among Nektar, Baxalta Incorporated, 
Baxalta US Inc. and Baxalta GmbH. Although we sold all of our rights to receive royalties from these products up to the cap, as a result of the limits on the 
2020 Transaction Royalties to be received by HCR and our ongoing manufacturing and supply obligations related to the generation of these royalties, we 
account for the transaction as debt and recognize these non-cash royalties as revenue. We recorded the $150.0 million in proceeds from this transaction as a 
liability (the 2020 Royalty Obligation) that will be amortized using the effective interest method over the estimated life of the 2020 Purchase and Sale 
Agreement. As of December 31, 2024, our prospective effective interest rate used to amortize the liability is 20%.

 
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The 2020 Purchase and Sale Agreement was to automatically expire, and the payment of the 2020 Transaction Royalties to HCR would cease, 
when HCR received payments of the 2020 Transaction Royalties equal to $210.0 million (the 2025 Threshold), if the 2025 Threshold were achieved on or 
prior to December 31, 2025, or $240.0 million, if the 2025 Threshold was not achieved on or prior to December 31, 2025 (or, if earlier, the date on which 
the last royalty payment under the relevant license agreements is made). On March 4, 2024, Nektar and HCR amended the original 2020 Purchase and Sale 
Agreement (the Amendment), pursuant to which the parties agreed to remove our reversionary rights in the royalties in exchange for a $15.0 million 
payment from HCR. Accordingly, HCR will receive all future royalties of the products, and none of these royalties will return to Nektar. We accounted for 
the Amendment as a modification of the existing arrangement, and therefore recorded the $15.0 million proceeds as an increase to the liability.
The sale of the Facility did not alter the 2012 or the 2020 Purchase and Sale Agreements, nor royalties payable under the related license 
agreements.
The following table shows the activity within the liability account of each arrangement (in thousands):
 
 
 
Year-Ended December 31, 2024
   
Period from inception to December 31, 2024
 
 
 
2012

Purchase

and Sale

Agreement
   
2020

Purchase

and Sale

Agreement
   
Total
   
2012

Purchase

and Sale

Agreement
   
2020

Purchase

and Sale

Agreement
   
Total
 
Liabilities related to the sales of future royalties—
beginning balance
  $
24,217    $
89,657    $
113,874    $
—    $
—    $
— 
Royalty monetization proceeds
   
—     
15,000     
15,000     
124,000     
165,000     
289,000 
Non-cash royalty revenue
   
(26,881)    
(37,386)    
(64,267)    
(380,728)    
(155,705)    
(536,433)
Non-cash interest expense
   
9,861     
18,251     
28,112     
250,403     
76,227     
326,630 
Payments to RPI
   
—     
—     
—     
(10,000)    
—     
(10,000)
Loss on revaluation of liability related to the sale of 
future royalties
   
—     
—     
—     
23,522     
—     
23,522 
Liabilities related to the sales of future royalties – 
ending balance
   
7,197     
85,522     
92,719     
7,197     
85,522     
92,719 
Less: unamortized transaction costs
   
—     
(943)    
(943)    
—     
(943)    
(943)
Liabilities related to the sales of future royalties, net
  $
7,197    $
84,579    $
91,776    $
7,197    $
84,579    $
91,776 
As royalties are remitted to RPI and HCR by our licensees, the balances of the respective Royalty Obligations will be effectively repaid over the 
lives of the agreements. To determine the amortization of the Royalty Obligations, we are required to estimate the total amount of future royalty payments 
to be received by RPI and HCR, respectively, and adjust the imputed interest rate. 
Note 6 — Pre-Funded Warrant
In March 2024, we issued a pre-funded warrant to purchase an aggregate of 25,000,000 shares of our common stock to TCG at a price of $1.20 per 
share for gross proceeds of $30.0 million. Transaction costs were immaterial. The pre-funded warrant has an exercise price of $0.0001 per share and may 
be exercised at any time after the original issuance date. TCG may not exercise the warrant if TCG, together with its affiliates, would beneficially own 
more than 9.99% of the number of shares of our common stock outstanding immediately after giving effect to such exercise. TCG may increase or decrease 
this percentage not in excess of 19.99% by providing at least 61 days’ prior notice to the Company. On May 28, 2024, we filed with the SEC a registration 
statement on Form S-3 (file no. 333-279760) registering for resale of up to 25,000,000 shares of our common stock issuable upon exercise of the pre-
funded warrant. The registration statement became effective on June 5, 2024. As of December 31, 2024, the warrant has not been exercised. 
We classified the pre-funded warrant as a component of permanent equity in our Consolidated Balance Sheets as it is a freestanding financial 
instrument that was immediately exercisable, does not embody an obligation for the Company to repurchase its own shares and permits the holder to 
receive a fixed number of shares of common stock upon exercise. All of the shares underlying the pre-funded warrant have been included in the weighted-
average number of shares of common stock used to calculate net loss per share attributable to common stockholders because the shares may be issued for 
little or no consideration, are fully vested and are exercisable after the original issuance date of the pre-funded warrant.

 
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Note 7 — Commitments and Contingencies
Purchase Commitments
In the normal course of business, we enter into various firm purchase commitments related to contract manufacturing, clinical development and 
certain other items. As of December 31, 2024, these commitments were approximately $1.6 million. 
Legal Matters
From time to time, we are involved in lawsuits, arbitrations, claims, investigations and proceedings, consisting of intellectual property, 
commercial, employment and other matters, which arise in the ordinary course of business. We make provisions for liabilities when it is both probable that 
a liability has been incurred and the amount of the loss can be reasonably estimated. Such provisions are reviewed at least quarterly and adjusted to reflect 
the impact of settlement negotiations, judicial and administrative rulings, advice of legal counsel, and other information and events pertaining to a 
particular case. Litigation is inherently unpredictable. If any unfavorable ruling were to occur in any specific period, there exists the possibility of a 
material adverse impact on the results of our operations for that period and on our cash flows and liquidity.
On August 7, 2023, we filed a complaint in the United States District Court for the Northern District of California (the Court) against Lilly 
alleging, among other claims, breach of contract and breach of implied covenant of good faith and fair dealing (the Complaint), in connection with our 
collaboration with Lilly. Following the denial of its motion to dismiss the Complaint entirely, Lilly filed an answer that included counterclaims against us 
alleging breach of specified confidentiality provisions and defamation. The case is proceeding.
We have recorded no liability for any litigation matters in our Consolidated Balance Sheets at either December 31, 2024 or December 31, 2023.
Indemnification Obligations
During the course of our normal operating activities, we have agreed to certain contingent indemnification obligations as further described below. 
The term of our indemnification obligations is generally perpetual. There is generally no limitation on the potential amount of future payments we could be 
required to make under these indemnification obligations. To date, we have not incurred significant costs to defend lawsuits or settle claims based on our 
indemnification obligations. If any of our indemnification obligations is triggered, we may incur substantial liabilities. Because the aggregate amount of 
any of these potential indemnification obligations is not a stated amount, we cannot reasonably estimate the overall maximum amount of any such 
obligations. We have recorded no liabilities for these obligations in our Consolidated Balance Sheets at either December 31, 2024 or December 31, 2023.
Indemnifications in Connection with Commercial Agreements
As part of our collaboration agreements with our partners related to the license, development, manufacture and supply of drugs based on our 
proprietary technologies and drug candidates, we generally agree to defend, indemnify and hold harmless our partners from and against third party 
liabilities arising out of the agreement, including product liability (with respect to our activities) and infringement of intellectual property to the extent the 
intellectual property is developed by us and licensed to our partners. The term of these indemnification obligations is generally perpetual commencing after 
execution of the agreement. There is generally no limitation on the potential amount of future payments we could be required to make under these 
indemnification obligations.
From time to time, we enter into other strategic agreements such as divestitures and financing transactions pursuant to which we are required to 
make representations and warranties and undertake to perform or comply with certain covenants. For example, we made certain intellectual property 
representations in connection with our RPI and HCR transactions, however, the time limitation we have to indemnify RPI with respect to any breach of 
these intellectual property-based representations and warranties has passed. In the event it is determined that we breached certain of the representations and 
warranties or covenants made by us in any such agreements or certain express indemnification provisions are applicable, we could incur substantial 
indemnification liabilities depending on the timing, nature, and amount of any such claims.
To date, we have not incurred any costs to defend lawsuits or settle claims related to these indemnification obligations, nor any breaches of 
representations or warranties or covenants. Because the aggregate amount of any potential indemnification obligation is not a stated amount, we cannot 
reasonably estimate the overall maximum amount of any such obligations.

 
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Indemnification of Underwriters and Initial Purchasers of our Securities
In connection with our sale of equity we have agreed to defend, indemnify and hold harmless our underwriters or initial purchasers, as applicable, 
as well as certain related parties from and against certain liabilities, including liabilities under the Securities Act of 1933, as amended.
Director and Officer Indemnifications
As permitted under Delaware law, and as set forth in our Certificate of Incorporation and our Bylaws, we indemnify our directors, executive 
officers, other officers, employees, and other agents for certain events or occurrences that may arise while in such capacity. The maximum potential amount 
of future payments we could be required to make under this indemnification is unlimited; however, we have insurance policies that may limit our exposure 
and may enable us to recover a portion of any future amounts paid. Assuming the applicability of coverage, the willingness of the insurer to assume 
coverage, and subject to certain retention, loss limits and other policy provisions, we believe any obligations under this indemnification would not be 
material, other than retention of up to $2.5 million per incident for merger and acquisition related claims, $2.5 million per incident for securities related 
claims and $2.5 million per incident for non-securities related claims per our insurance policy. However, no assurances can be given that the covering 
insurers will not attempt to dispute the validity, applicability, or amount of coverage without expensive litigation against these insurers, in which case we 
may incur substantial liabilities as a result of these indemnification obligations.
Note 8 — Stockholders’ Equity
As of December 31, 2024, shares of common stock reserved for future issuance are as follows (in thousands):
 
Stock options and RSUs outstanding
 
 
34,582 
Shares reserved for pre-funded warrant
 
 
25,000 
Shares available for future grant under the 2017 Performance Incentive Plan
 
 
8,277 
Shares available for issuance under the employee stock purchase plan
 
 
711 
Total common stock reserved for issuance
   
68,570 
 
Note 9 — License and Collaboration Agreements
We have entered into various collaboration agreements including license agreements and collaborative research, development and 
commercialization agreements with various pharmaceutical and biotechnology companies. Under these collaboration arrangements, we are entitled to 
receive license fees, upfront payments, milestone and other contingent payments, royalties, sales milestone payments, reimbursements for research and 
development activities and (before the sale of the Facility) payments for the manufacture and supply of our proprietary PEG reagents. We generally include 
our costs of performing these services in research and development expense, except for costs for product sales to our collaboration partners which we 
include in cost of goods sold. We analyze our agreements to determine whether we should account for the agreements within the scope of ASC 808 
Collaborative Arrangements, and, if so, we analyze whether we should account for any elements under ASC 606 Revenue from Contracts with Customers.
Eli Lilly and Company (Lilly): Rezpegaldesleukin (previously referred to as NKTR-358)
On July 23, 2017, we entered into a worldwide license agreement (the Lilly Agreement) with Lilly to co-develop rezpegaldesleukin, a novel 
immunological drug candidate that we invented, pursuant to which we received an initial payment of $150.0 million and were eligible for up to $250.0 
million in additional development and regulatory milestones. The Lilly Agreement provided that, during Phase 1B and Phase 2 development, we shared 
development costs wherein 75% of the costs were borne by Lilly and 25% of the costs were borne by us.
On April 23, 2023, we received from Lilly a notice of at-will termination of the Lilly Agreement. We have regained full rights to 
rezpegaldesleukin from Lilly, and the Lilly Agreement subsequently terminated. Following the return of our rights to develop rezpegaldesleukin, we bear 
all costs of development.
Bristol-Myers Squibb Company (BMS): Bempegaldesleukin, also referred to as NKTR-214
Effective April 3, 2018, we entered into a Strategic Collaboration Agreement (the BMS Collaboration Agreement) and a Share Purchase 
Agreement with BMS. Pursuant to the BMS Collaboration Agreement, we and BMS jointly developed bempegaldesleukin in combination with BMS’ 
Opdivo®. The parties shared the internal and external development costs for bempegaldesleukin in combination regimens based on each party’s relative 
ownership interest in the compounds included in the regimens.

 
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Upon the effective date of the BMS Collaboration Agreement in April 2018, BMS paid us a non-refundable upfront cash payment of $1.0 billion 
and purchased 8,284,600 shares of our common stock pursuant to the Share Purchase Agreement for total additional cash consideration of $850.0 million. 
In 2020, we received additional non-refundable milestone payments of $50.0 million.
As discussed in Note 1, in April 2022, we announced that BMS and we decided to discontinue all development of bempegaldesleukin in 
combination with Opdivo®. On September 6, 2023, BMS and we terminated the BMS Collaboration Agreement, and pursuant to the surviving provisions 
of the BMS Collaboration Agreement, we and BMS continue our efforts to wind down the bempegaldesleukin program, and the cost sharing provisions 
continue to remain in effect as the parties wind down the studies. On February 12, 2024, we repurchased the 8.3 million shares previously sold to BMS for 
total cash consideration of $3.0 million.
We determined that the BMS Collaboration Agreement falls within the scope of ASC 808. Based on the cost sharing provisions described above, 
we recognize the net reimbursement to (from) BMS as an increase (decrease) to the applicable expense. As discussed in Note 10, beginning in the second 
quarter of 2022, we began reporting the costs for the wind down of the bempegaldesleukin program in restructuring and impairment. For the year ended 
December 31, 2024, such amounts are immaterial and are included in research and development expense.
Biolojic Design (Biolojic): NKTR-0165
In 2021, we entered into a research collaboration and license option agreement with Biolojic to discover and develop agonistic antibodies that 
activate a novel and previously un-drugged target for the treatment of autoimmune diseases. In 2023, we exercised an option to gain an exclusive license to 
specified agonistic antibodies and other materials that were developed pursuant to a research collaboration and license option agreement in all fields of use 
(other than in the field of oncology). As a result of exercising the option to gain an exclusive license, we may be required to pay up to $18.0 million based 
on the achievement of certain development milestones, including the first milestone of $3.0 million payable upon the acceptance of the first investigational 
new drug application, and up to $35.0 million based on the achievement of certain regulatory approval milestones. Each milestone is payable only once, 
regardless of the number of indications for which we develop the licensed product. We record a liability when a milestone payment becomes probable. As 
of December 31, 2024, no milestones have been achieved or are considered probable, and no liability has been recorded. 
Other
We have a collaboration agreement with UCB for dapirolizumab pegol, under which we are entitled to up to a total of $40.0 million of regulatory 
approval milestones, as well as royalties in the low single digits based on net sales of commercialized products, if any. UCB is developing dapirolizumab 
pegol, a PEGylated antibody fragment, with Biogen, Inc. for the treatment of systemic lupus erythematosus. However, given the current phase of 
development of this product and the uncertainty in clinical development, we have excluded these milestones from the transaction price for this agreement. 
We have not sold our rights to receive these milestones or royalties from dapoirolizumab pegol under the APA for the sale of the Facility. 
On July 31, 2024, and further formalized in an Amended and Restated Manufacturing and Supply Agreement dated October 18, 2024, we entered 
into a long-term “take or pay” supply agreement with UCB that increases the selling price of the PEG reagent used in the manufacture of CIMZIA® (the 
UCB Supply Agreement). The UCB Supply Agreement also covers UCB’s purchases of the same reagent (at the same price) for use in the manufacture of 
dapirolizumab pegol. We analyzed the terms of the agreement, including its cancellation provisions, and concluded that it represents a long-term 
agreement. Since the performance obligations are deliveries of a single reagent, we determined a single sales price for recognition of revenue over the term 
of the arrangement. Accordingly, because the billed price was less than the single sales price, we recorded a contract asset of $7.0 million as of December 
2, 2024. Pursuant to the APA between Gannet BioChem and us, the UCB Supply Agreement was assigned to Gannet BioChem upon closing of the sale of 
the Facility. The assignment of the UCB Supply Agreement does not alter the potential milestones and potential royalties payable by UCB to us pursuant to 
the collaboration agreement for dapirolizumab pegol nor the non-cash royalties payable under our collaboration agreement for CIMZIA®.  See Note 12 for 
additional information on the APA.
Note 10 — Restructuring and Impairment
 
As discussed in Note 1, because our registrational trials in bempegaldesleukin did not meet their primary endpoints, we decided to discontinue all 
development of bempegaldesleukin and wind down the clinical trials studying bempegaldesleukin. In April 2022, we announced the 2022 Restructuring 
Plan pursuant to which we completed an approximate 70% reduction of our workforce during 2022. We also sold our research facility in India in December 
2022 and decided to sublease certain of our leased premises in San Francisco, CA, including all of our office leased space in the Third Street Facility and 
portions of our office and laboratory space in the Mission Bay Facility.

 
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Pursuant to plans approved by our Board in March 2023, we announced the 2023 Restructuring Plan to further reduce our San Francisco-based 
workforce by approximately 60%, which was substantially completed by June 30, 2023. In addition, under the 2023 Restructuring Plan, we decided to 
sublease our remaining office and laboratory space in the Mission Bay Facility, which we had not planned to sublease pursuant to the 2022 Restructuring 
Plan.
In connection with our 2022 and 2023 Restructuring Plans, restructuring and impairment includes the following (in thousands):
 
 
 
Year ended December 31,
 
 
 
2024
   
2023
 
Severance and benefit expense
 $
— 
 $
7,885 
Impairment of right-of-use assets and property, plant and equipment
  
8,329 
  
35,328 
Loss on sale of other property, plant and equipment, net
  
— 
  
1,300 
Contract termination and other restructuring costs
  
7,341 
  
7,445 
Restructuring and impairment
 $
15,670 
 $
51,958 
Severance and Benefit Expense
Employees affected by the reduction in force under the 2022 and 2023 Restructuring Plans are entitled to receive severance payments and certain 
Company-funded benefits. The restructuring charges are recorded at fair value.
For the 2022 Restructuring Plan, we recognized all expense in 2022 and paid the final liability of $3.3 million in the three months ended March 
31, 2023. 
For the 2023 Restructuring Plan, we recognized $7.9 million in total expense in 2023 for the 2023 Restructuring Plan and paid the final liability of 
$0.2 million in the three months ended March 31, 2024. We do not expect to recognize any additional severance and benefits expense for the 2022 and 
2023 Restructuring Plans.
The following table provides details regarding the severance and benefit expense for the years ended December 31, 2024 and 2023 pursuant to the 
2022 and 2023 Restructuring Plans and a reconciliation of the severance and benefits liability for the year ended December 31, 2024 pursuant to the 2022 
and 2023 Restructuring Plans, which we report within accrued expenses on our Consolidated Balance Sheets (in thousands):
 
 
 
2023 Restructuring 
Plan
   
2022 Restructuring 
Plan
   
Total
 
Liability balance as of December 31, 2022
  $
—    $
3,299    $
3,299 
Expense recognized during the period
   
7,885     
—     
7,885 
Payments during the period
   
(7,689)    
(3,299)    
(10,988)
Liability balance as of December 31, 2023
  $
196    $
—    $
196 
Expense recognized during the period
   
—     
—     
— 
Payments during the period
   
(196)    
—     
(196)
Liability balance as of December 31, 2024
  $
—    $
—    $
— 
Impairment of Long-Lived Assets
As a result of our 2022 and 2023 Restructuring Plans, we decided to seek a sublease for all of our leased spaces in the Third Street Facility and the 
Mission Bay Facility. Accordingly, we evaluate each space for impairment when management decides to sublease the respective space and at each 
reporting date thereafter, as facts and circumstances change. The significant assumptions in our impairment analysis relate to sublease income, including 
the length of time to enter into a sublease, sublease rental payments, free rent periods, tenant improvement allowances and broker commissions. When 
available, we use sublease negotiations or agreements, but in the absence of such information, we develop our own subjective estimates based on current 
real estate trends and market conditions. Accordingly, our estimates are subject to significant risk, and the terms of sublease agreements, if any, and the 
resulting amount and timing of sublease income, if ever realized, may be materially different than our estimates.  
As part of our evaluation of each sublease space, we separately compare the estimated undiscounted sublease income, as described above, for each 
sublease to the net book value of the related long-term assets, which include right-of-use assets and certain property, plant and equipment, primarily for 
leasehold improvements (collectively, sublease assets). If such sublease income exceeds the net book value of the sublease assets, we do not record an 
impairment charge. Otherwise, we record an impairment charge by reducing the net book value of the sublease assets to their estimated fair value, which 
we determined by discounting the estimated sublease income using the estimated borrowing rate of a market participant subtenant, which has ranged from 
8.7%  to 6.2% for the periods described below.

 
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We recorded non-cash impairment charges of lease assets pertaining to the 2022 and 2023 Restructuring Plans as follows (in thousands):
 
 
Three-months Ended
 
Sublease Spaces
 
March 31, 2023    
June 30, 2023
   
September 30, 
2023
   
December 31, 
2023
    March 31, 2024    
June 30, 2024
   
Total
 
Mission Bay Blvd. South
  $
—  
  $
7,061  
  $
1,467  
  $
—  
  $
—  
  $
—  
  $
8,528  
Third St
   
—  
   
6,200  
   
—  
   
—  
   
—  
   
4,429  
   
10,629  
Total 2022 Restructuring Plan    
—  
   
13,261  
   
1,467  
   
—  
   
—  
   
4,429  
   
19,157  
Mission Bay Blvd. South - 2023 
Restructuring Plan
   
11,500  
   
—  
   
9,100  
   
—  
   
—  
   
3,900  
   
24,500  
Total impairment of lease assets   $
11,500  
  $
13,261  
  $
10,567  
  $
—  
  $
—  
  $
8,329  
  $
43,657  
During the three months ended March 31, 2023, we recorded an initial impairment charge of $11.5 million for our remaining office and laboratory 
leased space in our Mission Bay Facility, when we initially decided to sublease the space under the 2023 Restructuring Plan. As the life sciences lease 
market has continued to deteriorate in the San Francisco Bay Area, we recorded additional non-cash impairment charges of $9.1 million in the three months 
ended September 30, 2023, and $3.9 million in the three months ended June 30, 2024, for this space.  
During the three months ended June 30, 2023 and September 30, 2023, we recorded additional non-cash impairment charges of $7.1 million and 
$1.5 million, respectively, for other sublease assets in our Mission Bay Facility that we sought to sublease under the 2022 Restructuring Plan. Due to the 
worsening office lease market, for the three months ended June 30, 2023 and 2024, we recorded non-cash impairment charges of $6.2 million and $4.4 
million, respectively, for our sublease assets at our Third Street Facility. 
The following is a reconciliation of the impairment charges we recorded for the full year ended December 31, 2024 and the full year ended 
December 31, 2023, including the net book values of the sublease assets before the impairment and the fair values of the sublease assets (in thousands):
 
 
 
Year Ended December 31, 2023
 
 
 
Operating Lease 
Right-of-Use Assets    
Property, Plant

and Equipment
   
Total
 
Net book value of impaired sublease assets
  $
44,921    $
6,943    $
51,864 
 Less: Fair value of impaired sublease assets — Level 3 of Fair Value Hierarchy
   
(14,364)    
(2,172)    
(16,536)
 Book value in excess of fair value
  $
30,557    $
4,771    $
35,328 
 
 
 
Year-Ended December 31, 2024
 
 
 
Operating Lease 
Right-of-Use Assets    
Property, Plant and 
Equipment
   
Total
 
Net book value of impaired sublease assets
  $
12,506    $
1,897    $
14,403 
Less: Fair value of impaired facilities — Level 3 of Fair Value Hierarchy
   
(5,219)    
(855)    
(6,074)
Total impairment of right-of-use assets and property, plant and equipment
  $
7,287    $
1,042    $
8,329 
Loss on Sale of Property, Plant and Equipment, Net
We sold excess lab equipment under the 2023 Restructuring Plan. We determined the loss as follows (in thousands):
 
 
 
Year Ended December 31,
 
 
 
2024
 
2023
 
Proceeds from sales
 
$
—  $
1,245 
Net book value of assets
 
 
—   
2,545 
Total loss on sale of other property, plant and equipment, net
 
$
—  $
1,300 
 

 
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Contract Termination and Other Restructuring Costs
Contract termination and other restructuring costs include the following (in thousands):
 
 
 
Year Ended December 31,
 
 
 
2024
   
2023
 
Contract termination costs
  $
7,341 
 $
1,953 
Costs for the wind down of the bempegaldesleukin program
   
— 
  
5,492 
Contract termination and other restructuring costs
  $
7,341 
 $
7,445 
We have incurred significant contract termination costs in connection with our Restructuring Plans. Because we continue to adjust the liability 
based on updates to our assumptions at each reporting date, we continue to recognize expense as our estimates change until settlement.
The following is a reconciliation of the contract termination costs, for the years ended December 31, 2024 and 2023.  We reported $3.0 million 
and $2.8 million in accrued expenses as of December 31, 2023 and December 31, 2024, respectively, and reported $2.5 million and $6.3 million, 
respectively, in other long-term liabilities on our Consolidated Balance Sheets (in thousands):
 
 
 
Year Ended
 
 
 
December 31, 2024
 
Liability balance as of December 31, 2022
 $
7,710 
Expense recognized during the period
  
1,919 
Payments during the period
  
(4,087)
Liability balance as of December 31, 2023
  
5,542 
Expense recognized during the period
  
7,341 
Payments during the period
  
(3,805)
Liability balance as of December 31, 2024
 $
9,078 
In prior periods through March 31, 2022, we reported the clinical trial costs, other third-party costs and employee costs related to the 
bempegaldesleukin program primarily in research and development expense. Beginning in the second quarter of 2022, following our announcement to 
terminate the program, we began recording these costs for the wind down of the bempegaldesleukin program in restructuring and impairment. For the year 
ended December 31, 2024, such amounts are immaterial and are included in research and development expense.
 
Note 11 — Impairment of Goodwill
During the three months ended March 31, 2023, our stock price and resulting market capitalization experienced a significant, sustained decline. 
Accordingly, we assessed our long-lived assets, including our property, plant and equipment, right-of-use assets and goodwill, for impairment.
As part of our long-lived asset impairment analysis, we first assessed which long-lived assets have identifiable cash flows that are largely 
independent of the cash flows of other groups of assets. We concluded that the sublease assets, for which we have recognized significant impairment 
charges during 2022 and 2023, including for the three months ended March 31, 2023, are independent of our entity-wide group. See Note 10 for additional 
information regarding impairment charges that we have recorded for our sublease assets.
We next evaluated our remaining long-lived assets for impairment and performed a recoverability test using the undiscounted cash flows 
approach. We did not recognize any additional impairment charges on the remaining long-lived assets.
Finally, we measured the fair value of our reporting unit utilizing both income and market approaches for our entity-wide asset impairment 
analysis. Based on this analysis, we wrote off all of our goodwill, resulting in a non-cash impairment charge of $76.5 million during the three months ended 
March 31, 2023, which we reported as impairment of goodwill in our Consolidated Statements of Operations for the year ended December 31, 2023. We 
had previously recognized goodwill primarily from our acquisitions of Shearwater Corp. and Aerogen, Inc. in 2001 and 2005, respectively. 
 
Note 12 — Gain on Sale of the Huntsville Manufacturing Facility
On December 2, 2024, we completed the sale of the Facility and certain other manufacturing assets related thereto, including the assignment of our 
existing manufacturing and supply obligations, to Gannet BioChem, an affiliate of Ampersand, via the APA, for consideration of $64.7 million in cash, net 
of transaction costs, and an approximate 20% equity interest at the time of close in Gannet BioChem. The net cash proceeds reflect the base purchase price 
of $70.0 million, net of 

 
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transaction costs totaling $6.2 million, and adjustments based on closing net working capital, totaling $0.9 million in incremental proceeds. We determined 
that the sale of the Facility meets the definition of a deconsolidation of a business.
At closing of the sale of the Facility and at December 31, 2024, we own 20.0 million common units at $1.00 per unit, representing 100% of the 
common units outstanding, and Ampersand owns 81.5 million preferred units at $1.00 per unit, representing 100% of the preferred units outstanding. In the 
event of a distribution, to the extent available, the preferred unitholders have priority rights to a cumulative preferred dividend and a return of their 
investment before any distributions to common unitholders. After such priority distribution to the preferred unitholders, to the extent available, common 
unitholders are to receive a distribution of both a cumulative dividend at the same rate as the preferred unitholders’ dividend and a return of their 
investment. Any distributions in excess of both of these distributions, if available, are distributed to preferred and common unitholders pro rata.
We have significant influence, but do not control, Gannet BioChem through our noncontrolling representation on Gannet BioChem’s board of 
directors and our equity interests in Gannet BioChem. Accordingly, we do not consolidate Gannet BioChem and account for our investment in Gannet 
BioChem using the equity method of accounting. We recorded our investment in Gannet BioChem at its fair value upon the sale of the Facility. The fair 
value of the equity method investment was determined using an option pricing method (OPM) based on the consideration paid for the preferred units. The 
OPM allows for the allocation of a company’s equity value among the various equity capital owners (preferred and common unitholders) and estimates the 
implied equity value of Gannet BioChem. The OPM uses the unitholders’ liquidation preferences to determine how proceeds from a liquidity event shall be 
distributed among the various ownership classes with an expected term to a liquidity event commensurate with a private equity investment. The following 
table lists the other Black-Scholes option-pricing model assumptions used to calculate the fair value of the equity method investment. 
 
Risk-free interest rate
 
 
4.1%
Dividend yield
 
 
0.0%
Volatility factor
 
 
50.0%
At closing of the Transaction, we estimated the fair value of our investment in Gannet BioChem to be $12.2 million, and we recorded a gain of 
$40.4 million on the sale of the Facility. The gain was computed as follows (in thousands):
 
Cash proceeds at closing
 
$
71,167 
Net working capital adjustment
 
 
(322)
Fair value of equity method investment in Gannet BioChem - Level 3 of Fair Value Hierarchy
 
 
12,218 
Gross cash and non-cash proceeds
 
 
83,063 
Transaction costs
 
 
(6,155)
Net proceeds
 
$
76,908 
 
Accounts receivable
 
$
4,250 
Inventory
 
 
14,655 
Other current assets
 
 
864 
Current liabilities
 
 
(1,354)
Net working capital
 
 
18,415 
Property, plant and equipment, net
 
 
11,569 
Contract asset, net
 
 
6,534 
Net assets sold
 
$
36,518 
 
Net proceeds
 
$
76,908 
Net assets sold
 
 
(36,518)
Gain on asset sale
 
$
40,390 
Gannet BioChem is considered a related party to Nektar. Concurrently with the closing of the transaction, we entered into certain ancillary 
agreements with Gannet BioChem, including supply agreements for rezpegaldesleukin and NKTR-255, and certain services agreements. 

 
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Supply Agreements
Under the terms of the supply agreements, Gannet BioChem has agreed to manufacture and supply the PEG reagents for use in clinical trials of 
these drug candidates at prices defined within the agreements. There are no minimum purchase commitments and Nektar can terminate the agreement for 
convenience upon prior written notice. After the sale of the Facility through December 31, 2024, we did not make any purchases from Gannet BioChem. 
Services Agreements
Pursuant to a transition services agreement and full-time employee equivalent agreement, Nektar is performing certain transition services for the 
benefit of Gannet BioChem, primarily related to information technology and accounting, and Gannet BioChem is performing certain transition services for 
the benefit of Nektar, primarily to support research and development activities. The terms of these agreements are no more than two years, subject to 
certain termination provisions. For the year ended December 31, 2024, we recorded $0.3 million as research and development expenses for services 
provided by Gannet BioChem to us and $0.1 million as other income for services provided by us to Gannet BioChem in our Consolidated Statements of 
Operations. 
As of December 31, 2024, we recorded a net payable of $3.4 million to Gannet BioChem, consisting of $2.9 million for the collection of 
receivables from Gannet BioChem’s customers, net of payments to Gannet BioChem’s vendors, under the transition services agreement, $0.3 million for 
the final net working capital adjustment, and $0.2 million, net, under the services agreements. We report this amount in accrued expenses in our 
Consolidated Balance Sheets. 
 
Note 13 — Stock-Based Compensation
2017 Performance Incentive Plan
Our 2017 Performance Incentive Plan, as amended and restated, (2017 Plan) provides for the issuance of our common stock to members of the 
Board of Directors, officers or employees, certain consultants and advisors and our subsidiaries. On June 5, 2024, the stockholders of Nektar approved an 
amendment to the 2017 Plan to increase the aggregate number of shares of Common Stock authorized for issuance thereunder by 8,000,000 shares. Under 
the 2017 Plan, we may issue stock options, restricted stock, performance stock, stock units, stock appreciation rights and other similar types of awards. 
When the 2017 Plan was approved on June 14, 2017, any shares of our common stock that were available for issuance under our 2012 Performance 
Incentive Plan (the 2012 Plan) ceased to be available for future grants. However, options and RSUs granted under the 2012 Plan remained outstanding, and 
any options or RSUs that were cancelled or forfeited became available for issuance under the 2017 Plan. Shares issued for RSUs, PSUs or any other “full-
value award” are counted against the share limit as 1.5 shares for every one share granted in connection with the award.
We have granted non-qualified stock options, RSUs and PSUs to employees, officers, and non-employee directors. For our employees, the 
requisite service period is generally three to four years for stock options, and three years for RSUs and PSUs. For our directors, the requisite service is 
generally one year for stock options and RSUs. The maximum term of a stock option is eight years from the date of grant. The per share exercise price of 
an option generally may not be less than the fair market value of a share of our common stock on the NASDAQ Stock Market on the date of grant.
Under our Change in Control Plan (the CIC Plan), in the event of a change of control of Nektar and a subsequent termination of employment 
initiated by us or a successor company other than for Cause (as defined in the CIC Plan) within twelve months following a change of control, our 
employees are entitled to full acceleration of their unvested equity awards. Our Chief Executive Officer, Senior Vice Presidents and Vice Presidents 
(including Principal Fellows) are also entitled to full acceleration of unvested equity awards if the termination is initiated by the employee for a Good 
Reason Resignation (as defined in the CIC Plan) within twelve months following a change of control. Additionally, non-employee directors would also be 
entitled to full acceleration of vesting of all outstanding stock awards in the event of a change of control transaction.
Employee Stock Purchase Plan
Under the terms of our Employee Stock Purchase Plan (ESPP), employees may purchase shares of our common stock based on a percentage of 
their compensation subject to certain limits. Shares are purchased at 85% of the lower of the closing price on either the first day or last day of each six-
month offering period. An aggregate 3,500,000 shares have been authorized for issuance under our ESPP.
Stock-Based Compensation Expense
We recognize total stock-based compensation expense in our Consolidated Statements of Operations as follows (in thousands):
 
 
 
Year Ended December 31,
 
 
 
2024
   
2023
 
Cost of goods sold
 
$
1,946 
 $
3,177 
Research and development
 
 
8,161 
  
13,890 
General and administrative
 
 
11,505 
  
16,321 
Total stock-based compensation
  $
21,612 
 $
33,388 
 

 
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Stock-based compensation expense resulting from PSUs and our ESPP was not significant in the years ended December 31, 2024, and 2023.
As of December 31, 2024, total unrecognized compensation costs of $19.6 million related to unvested stock-based compensation awards are 
expected to be recognized as expense over a weighted-average period of 2.7 years.
Black-Scholes Assumptions
The following table lists the Black-Scholes option-pricing model assumptions used to calculate the fair value of employee and director stock 
options, as well as the resulting grant-date fair value:
 
 
 
Year Ended December 31,
 
 
 
2024
 
 
2023
 
Average risk-free interest rate
   
4.2%   
4.0%
Dividend yield
   
0.0%   
0.0%
Average volatility factor
   
91.7%   
88.4%
Weighted-average expected life
 
5.1 years    
5.1 years  
Weighted-average grant-date fair value of options granted
  $
0.76 
 $
0.37 
 
The average risk-free interest rate is based on the U.S. treasury yield curve in effect at the time of grant for periods commensurate with the 
expected life of the stock-based award. We have never paid dividends, nor do we expect to pay dividends in the foreseeable future; therefore, we used a 
dividend yield of zero. Our estimate of expected volatility is based on the daily historical trading data of our common stock at the time of grant over a 
historical period commensurate with the expected life of the stock-based award. We estimated the weighted-average expected life based on the contractual 
and vesting terms of the stock options, as well as historical cancellation and exercise data.
Summary of Stock Option Activity
The table below presents a summary of stock option activity under our equity incentive plans (in thousands, except for price per share and 
contractual life information):
 
 
 
 
   
 
   
Weighted-
   
 
 
 
 
 
   
Weighted-
   
Average
   
 
 
 
 
 
   
Average
   
Remaining
   
 
 
 
 
Number
   
Exercise
   
Contractual
   
Aggregate
 
 
 
of
   
Price
   
Life
   
Intrinsic
 
 
 
Shares
   
per Share
   
(in Years)
   
Value(1)
 
Outstanding at December 31, 2023
 
 
23,016    $
8.26   
     
   
Options granted
   
12,541     
1.04   
     
   
Options exercised
   
(144)    
0.52   
     
   
Options forfeited & canceled
   
(2,354)    
7.87   
     
   
Outstanding at December 31, 2024
 
 
33,059    $
5.58     
6.39   $
4,468 
 
 
    
    
     
   
Exercisable at December 31, 2024
 
 
11,347     
13.14     
4.62   $
1,230 
 
 
(1)
Aggregate intrinsic value represents the difference between the exercise price of the option and the closing market price of our common stock on 
December 31, 2024.
The intrinsic value of options exercised during the years ended December 31, 2024 and 2023 was not significant.
Summary of RSU Activity
A summary of RSU award activity is as follows (in thousands except for per share amounts):
 
 
 
 
   
Weighted-
 
 
 
 
   
Average
 
 
 
 
   
Grant
 
 
 
 
   
Date Fair
 
 
 
Units Issued
   
Value
 
Unvested at December 31, 2023
 
 
4,230 
 $
6.14 
Granted
   
50 
  
1.09 
Vested and released
   
(2,474)
  
5.82 
Forfeited and canceled
   
(283)
  
3.06 
Unvested at December 31, 2024
 
 
1,523 
 $
7.07 
 

 
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The weighted-average grant-date fair values of RSUs granted during the years ended December 31, 2024 and 2023 were $1.09 and $1.10, 
respectively. The fair value of RSUs that vested in the years ended December 31, 2024 and 2023 totaled $2.8 million and $3.6 million, respectively.
401(k) Retirement Plan
We sponsor a 401(k) retirement plan whereby eligible employees may elect to contribute up to the lesser of 60% of their annual compensation or 
the statutorily prescribed annual limit allowable under Internal Revenue Service regulations. The 401(k) plan permits us to make matching contributions on 
behalf of all participants, up to a maximum of $12,000 per participant for the years ended December 31, 2023 and 2024. For the years ended December 31, 
2024 and 2023, we recognized $1.4 million, and $1.5 million, respectively, of compensation expense in connection with our 401(k) retirement plan.
Note 14 — Income Taxes
Loss before provision for income taxes includes the following components (in thousands):
 
 
 
Year Ended December 31,
 
 
 
2024
   
2023
 
Domestic
  $
(119,227)   $
(274,998)
Foreign
   
27     
(1,258)
Loss before provision for income taxes
  $
(119,200)   $
(276,256)
 
Provision for Income Taxes
The provision for income taxes consists of the following (in thousands):
 
 
 
Year Ended December 31,
 
 
 
2024
   
2023
 
Current:
 
    
   
Federal
  $
—    $
— 
State
   
(277)    
(43)
Foreign
   
48     
(17)
Total current income tax expense
   
(229)    
(60)
Deferred:
 
    
   
Federal
   
—     
— 
State
   
—     
— 
Foreign
   
(10)    
(140)
Total deferred income tax expense
   
(10)    
(140)
Provision (benefit) for income taxes
  $
(239)   $
(200)
 
Our income tax provision related to continuing operations differs from the amount computed by applying the statutory income tax rate of 21% to 
our pretax loss as follows (in thousands):
 
 
 
Year Ended December 31,
 
 
 
2024
   
2023
 
Income tax benefit at federal statutory rate
  $
(25,032)   $
(58,013)
Research credits
   
7,741     
(1,192)
Change in valuation allowance
   
1,635     
35,033 
Expiration of net operating loss carryforwards
   
8,252     
312 
Stock-based compensation
   
4,280     
8,919 
Non-cash interest expense on liability related to sales of future royalties
   
5,904     
5,320 
Non-cash royalty revenue related to sales of future royalties
   
(5,645)    
(7,838)
Impairment of goodwill
   
—     
16,065 
Other
   
2,626     
1,194 
Provision (benefit) for income taxes
  $
(239)   $
(200)
 

 
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Table of Contents
Deferred Tax Assets and Liabilities
Deferred income taxes reflect the net tax effects of loss and credit carryforwards and temporary differences between the carrying amount of assets 
and liabilities for financial reporting purposes and the amounts used for income tax purposes. We measure deferred tax assets and liabilities based on the 
rates at which they are expected to reverse in the future. Significant components of our deferred tax assets for federal and state income taxes are as follows 
(in thousands):
 
 
 
December 31,
 
 
 
2024
   
2023
 
Deferred tax assets:
 
    
   
Net operating loss carryforwards
  $
587,528    $
574,737 
Research and other credits
   
135,871     
144,128 
Net capital loss carryforwards
   
39,648     
39,655 
Operating lease liabilities
   
22,767     
25,384 
Stock-based compensation
   
19,619     
19,447 
Capitalized research and development costs
   
45,607     
34,675 
Liability related to the sale of future royalties
   
2,020     
6,729 
Other
   
9,402     
13,863 
Deferred tax assets before valuation allowance
   
862,462     
858,618 
Valuation allowance for deferred tax assets
   
(859,084)    
(854,528)
Total deferred tax assets
   
3,378     
4,090 
Deferred tax liabilities:
 
    
   
Operating lease right-of-use assets
   
(1,835)    
(3,824)
Investment in foreign subsidiary
   
(511)    
(521)
Outside basis difference in Gannet BioChem
   
(1,337)    
— 
Other
   
(205)    
(265)
Total deferred tax liabilities
   
(3,888)    
(4,610)
Net deferred tax assets (liabilities)
  $
(510)   $
(520)
Realization of our deferred tax assets is dependent upon future earnings, if any, the timing and amount of which are uncertain. Because of our lack 
of U.S. earnings history and projected future losses, we have fully reserved our net U.S. deferred tax assets with a valuation allowance. The valuation 
allowance increased by $4.6 million for the year ended December 31, 2024 and increased by $38.3 million for the year ended December 31, 2023.
Our net deferred tax liability position reflects the provision for the withholding taxes associated with the repatriation of accumulated earnings and 
profits from India.
Net Operating Loss and Tax Credit Carryforwards
As of December 31, 2024, we had a net operating loss carryforward for federal income tax purposes of approximately $2.8 billion, of which $1.2 
billion is subject to expiration beginning in 2025 and a total state net operating loss carryforward of approximately $0.7 billion, portions of which will 
begin to expire in 2026. We have federal tax credits of approximately $126.7 million, which will begin to expire in 2025 and state research credits of 
approximately $60.7 million which have no expiration date. Utilization of some of the federal and state net operating loss and credit carryforwards are 
subject to annual limitations due to the “change in ownership” provisions of the Internal Revenue Code of 1986 and similar state provisions.
Unrecognized tax benefits
We have the following activity relating to unrecognized tax benefits (in thousands):
 
 
 
Year Ended December 31,
 
 
 
2024
   
2023
 
Beginning balance
  $
126,498    $
85,845 
Tax positions related to current year:
 
    
   
Additions
   
582     
848 
Reductions
   
—     
— 
Tax positions related to prior years:
 
    
   
Additions
   
10,101     
40,079 
Reductions
   
(16)    
— 
Settlements
   
(815)    
— 
Lapses in statute of limitations
   
(678)    
(274)
Ending balance
  $
135,672    $
126,498 
 

 
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We currently have a full valuation allowance against our U.S. net deferred tax asset which would impact the timing of the effective tax rate benefit 
should any of these uncertain tax positions be favorably settled in the future. Adjustments to the substantial majority of our uncertain tax positions would 
result in an adjustment of our net operating loss or tax credit carryforwards rather than resulting in a cash outlay.
We file income tax returns in the U.S., California, Alabama, certain other states and India and certain other international jurisdictions. As a result 
of our net operating loss and research credit carryforwards, substantially all of our domestic tax years remain open and subject to examination. We may be 
subject to examination in India and other jurisdictions from time to time, but we do not believe that any liability resulting from such an examination would 
have a material effect on our financial position or results of operations.
Our policy is to include interest and penalties related to unrecognized tax benefits, if any, within the provision for income taxes in the consolidated 
statements of operations. During the years ended December 31, 2024 and 2023, no significant interest or penalties were recognized relating to unrecognized 
tax benefits. Although it is reasonably possible that certain unrecognized tax benefits could change in the future, we do not anticipate any significant 
changes over the next twelve months.
Note 15 — Segment Reporting
We operate in one business segment which focuses on applying our expertise to develop novel drug candidates. Our business offerings have 
similar economics and other characteristics, including the nature of products and manufacturing processes, types of customers, distribution methods and 
regulatory environment. We are comprehensively managed as one business segment by our Chief Executive Officer, who is our chief operating decision 
maker (CODM). 
The CODM assesses the performance of the Company and decides how to allocate resources based upon net loss that is also reported within the 
Consolidated Statements of Operations. The measure of segment assets that is reviewed by the CODM is reported within the Consolidated Balance Sheet as 
total assets. The following is a summary of the significant expense categories and consolidated net loss details provided to the CODM (in thousands):
 
 
Year Ended December 31,
 
 
 
2024
   
2023
 
Revenue:
  $
98,427    $
90,122 
Operating costs and expenses:
 
    
   
Cost of goods sold
   
30,686     
33,768 
Clinical development, contract manufacturing and other third party costs
 
    
   
Rezpegaldesleukin (cytokine Treg stimulant)
   
49,382     
14,554 
NKTR-255 (IL-15 receptor agonist)
   
15,795     
26,132 
NKTR-0165 (tumor necrosis factor receptor type II agonist)
   
9,339     
9,345 
Discovery research and other programs
   
2,334     
7,218 
Total clinical development, contract manufacturing and other third party costs
   
76,850     
57,249 
Employee costs (a)(b)
   
40,204     
55,572 
Facilities costs (a)
   
16,821     
20,832 
Other operating costs (a)(c)
   
42,047     
37,048 
Other segment expenses
   
37,407     
149,337 
Gain on sale of the Huntsville manufacturing facility
   
(40,390)    
— 
Total operating costs and expenses
   
203,625     
353,806 
Loss from operations
   
(105,198)    
(263,684)
Non-operating income (expense):
 
    
   
Non-cash interest expense on liability related to sale of future royalties
   
(28,112)    
(25,334)
Interest income
   
14,500     
19,009 
Other income (expense), net
   
(390)    
(6,247)
Total non-operating income (expense), net
   
(14,002)    
(12,572)
Loss before provision for income taxes
  $
(119,200)   $
(276,256)
 

 
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Other segment expense items included within net loss include the following (in thousands):
 
 
 
Year Ended December 31,
 
 
 
2024
   
2023
 
Impairment of right-of-use assets and property, plant and equipment
  $
8,329    $
35,328 
Loss on sale of other property, plant and equipment, net
   
—     
1,300 
Contract termination costs
   
7,341     
1,953 
Goodwill impairment
   
—     
76,501 
Stock-based compensation (a)
   
19,666     
30,210 
Depreciation and amortization expense (a)
   
2,071     
4,045 
Total other segment expenses
  $
37,407    $
149,337 
a)
Employee costs, facilities costs, other operating costs, stock-based compensation expense and depreciation and amortization expense include 
amounts reported in research and development expense and general and administrative expense in our Consolidated Statements of 
Operations. Such amounts reported in cost of goods sold in our Consolidated Statements of Operations are included in cost of goods sold in 
the summary of significant segment expenses.
b)
Includes compensation and benefits for our employees and costs for our contractors and temporary workers and includes severance expense 
of zero and $7.9 million for the years ended December 31, 2024 and 2023, respectively.
c)
Includes legal and patent expenses, information technology infrastructure and other costs, professional accounting, insurance, travel and 
entertainment and other third-party services and expenses. 
Our revenue has been derived primarily from customers in the pharmaceutical and biotechnology industries. Revenue from UCB Pharma, Baxalta 
/ Takeda, AstraZeneca, Pfizer, and Roche represented 39%, 18%, 17%, 12% and 10% of our revenue, respectively, for the year ended December 31, 2024. 
Revenue from UCB Pharma, Baxalta / Takeda, AstraZeneca and Pfizer represented 40%, 21%, 11% and 10% of our revenue, respectively, for the year 
ended December 31, 2023.
Revenue by geographic area is based on the headquarters or shipping locations of our partners. The following table sets forth revenue by 
geographic area (in thousands):
 
 
 
Year Ended December 31,
 
 
 
2024
   
2023
 
United States
 $
1,375 
 $
11,481 
Rest of World
  
97,052 
  
78,641 
Total revenue
 $
98,427 
 $
90,122 
 
At December 31, 2024 and 2023, all of our property, plant and equipment was located in the United States.
 

 
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Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure
None.
Item 9A. Controls and Procedures
Disclosure Controls and Procedures
We maintain disclosure controls and procedures that are designed to ensure that information required to be disclosed in our Securities Exchange 
Act of 1934 (Exchange Act) reports is recorded, processed, summarized, and reported within the time periods specified in the rules and forms of the SEC, 
and that such information is accumulated and communicated to management, including our Chief Executive Officer and Chief Financial Officer, as 
appropriate, to allow timely decisions regarding required disclosure.
As of the end of the period covered by this report, we carried out an evaluation, under the supervision and with the participation of our 
management, including our Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and operation of our disclosure controls 
and procedures pursuant to Exchange Act Rule 13a-15. Based upon, and as of the date of, this evaluation, our Chief Executive Officer and Chief Financial 
Officer concluded that our disclosure controls and procedures were effective.
Management’s Annual Report on Internal Control over Financial Reporting
Our management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in 
Exchange Act Rule 13a-15(f). Our 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 GAAP.
Our management has assessed the effectiveness of our internal control over financial reporting as of December 31, 2024. In making its assessment 
of internal control over financial reporting, management used the criteria described in Internal Control — Integrated Framework issued by the Committee 
of Sponsoring Organizations of the Treadway Commission (2013 Framework).
Based on our evaluation under the framework described in Internal Control — Integrated Framework, our management concluded that our internal 
control over financial reporting was effective as of December 31, 2024.
Changes in Internal Control Over Financial Reporting
We continuously seek to improve the efficiency and effectiveness of our internal controls. This results in refinements to processes throughout the 
Company. There was no change in our internal control over financial reporting during the quarter ended December 31, 2024, which was identified in 
connection with our management’s evaluation required by Exchange Act Rules 13a-15(f) and 15d-15(f) that has materially affected, or is reasonably likely 
to materially affect, our internal control over financial reporting.
Inherent Limitations on the Effectiveness of Controls
Our management, including our Chief Executive Officer and Chief Financial Officer, does not expect that our disclosure controls and procedures 
or our internal control over financial reporting will prevent all error and all fraud. A control system, no matter how well conceived and operated, can 
provide only reasonable, not absolute, assurance that the objectives of the control system are met. Because of the inherent limitations in all control systems, 
no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, within the company have been detected. These 
inherent limitations include the realities that judgments in decision-making can be faulty, and that breakdowns can occur because of simple errors or 
mistakes. Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more people or by management 
override of the control. The design of any system of controls also is based in part upon certain assumptions about the likelihood of future events, and there 
can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions. Over time, controls may become 
inadequate because of changes in conditions, or the degree of compliance with the policies or procedures may deteriorate. Because of the inherent 
limitations in a cost-effective control system, misstatements due to error or fraud may occur and not be detected.
Item 9B. Other Information
(a) None.
(b) None of our directors or “officers,” as defined in Rule 16a-1(f) under the Securities Exchange Act of 1934, adopted or terminated a Rule 10b5-
1 trading plan or arrangement or a non-Rule 10b5-1 trading plan or arrangement, as defined in Item 408(c) of Regulation S-K, during the fiscal quarter 
covered by this report.

 
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Item 9C. Disclosure Regarding Foreign Jurisdictions that Prevent Inspections
Not applicable.

 
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Part III
Item 10. Directors, Executive Officers and Corporate Governance. 
Information About the Board of Directors
Directors continuing in office until the 2025 Annual Meeting
Diana Brainard, M.D., age 54, was appointed to our board of directors in November 2021. Dr. Brainard is an Entrepreneur Partner at MPM 
BioImpact, a biotechnology investment firm.  She formerly served as the Chief Executive Officer and a member of the board of directors of AlloVir, Inc., a 
late clinical-stage cell therapy company. Prior to joining AlloVir, Inc., Dr. Brainard served as Senior Vice President and Virology Therapeutic Area Head 
at Gilead Sciences, Inc. from 2018 to April 2021. From 2015 to 2018, Dr. Brainard served as Vice President of Clinical Research, Liver Diseases at Gilead 
Sciences, Inc. Dr. Brainard obtained her B.A. degree from Brown University and her M.D. from Tulane University School of Medicine. 
R. Scott Greer, age 66, has served as our director since February 2010. Mr. Greer currently serves as Managing Director of Numenor Ventures, 
LLC, a venture capital firm. In 1996, Mr. Greer co-founded Abgenix, Inc., a company that specialized in the discovery, development and manufacture of 
human therapeutic antibodies, and from June 1996 through May 2002, he served as its Chief Executive Officer. He previously also served as a director of 
Abgenix from 1996 and Chairman of the board of directors from 2000 until the acquisition of Abgenix by Amgen, Inc. in April 2006. Prior to Abgenix’s 
formation, Mr. Greer held senior management positions at Cell Genesys, Inc., a biotechnology company, initially as Chief Financial Officer and Vice 
President of Corporate Development and later as Senior Vice President of Corporate Development, and various positions at Genetics Institute, Inc., a 
biotechnology research and development company. He previously served on the board of directors of Inogen, Inc., a medical device company that develops 
and markets oxygen therapy products from 2015-2021, Sientra, Inc., a medical aesthetics company from 2014-2018, Versartis, Inc., an endocrine focused 
biopharmaceutical company from 2014-2018, Auspex Pharmaceuticals, a biopharmaceutical company developing drugs for patients with movement 
disorders and other rare diseases from 2014-2015, StemCells, Inc., a biopharmaceutical company focused on stem cell therapeutics from 2010-2016, 
Ablexis, an antibody technology company, as its Chairman of the board of directors from 2010-2016, Sirna Therapeutics, Inc., a biotechnology company, 
from 2003, and as its Chairman of the board of directors from 2005, through the closing of the acquisition of Sirna by Merck & Co., Inc. in December 
2006. Mr. Greer previously also served as a member of the board of directors of Illumina, Inc., a provider of integrated systems for the analysis of genetic 
variation and biological function from 2001-2005 and of the board of directors of CV Therapeutics, Inc., a biotechnology company from 2001-2004. Mr. 
Greer received a B.A. in Economics from Whitman College and an M.B.A. degree from Harvard University. He also was a certified public accountant. 
Directors continuing in office until the 2026 Annual Meeting  
Howard W. Robin, age 72, has served as our President and Chief Executive Officer since January 2007 and has served as a member of our board 
of directors since February 2007. Mr. Robin served as Chief Executive Officer, President and a director of Sirna Therapeutics, Inc., a biotechnology 
company, from July 2001 to November 2006 and from January 2001 to June 2001, served as their Chief Operating Officer, President and as a director. 
From 1991 to 2001, Mr. Robin was Corporate Vice President and General Manager at Berlex Laboratories, Inc. (“Berlex”), a pharmaceutical products 
company that is a subsidiary of Schering, AG, and from 1987 to 1991 he served as Vice President of Finance and Business Development and Chief 
Financial Officer. From 1984 to 1987, Mr. Robin was Director of Business Planning and Development at Berlex. He was a Senior Associate with Arthur 
Andersen & Co. prior to joining Berlex. He received his B.S. in Accounting and Finance from Fairleigh Dickinson University, where he previously served 
as a member of its Board of Trustees. 
Directors continuing in office until the 2027 Annual Meeting  
Jeff Ajer, age 62, was appointed to the board of directors of in September 2017. Mr. Ajer was the former Executive Vice President and Chief 
Commercial Officer from 2014 to 2024 at BioMarin, a global biotechnology company that develops and commercializes innovative therapies for people 
with serious and life-threatening rare disorders. Mr. Ajer has more than 25 years of experience driving commercialization for rare diseases and specialty 
medicines, including leading commercial planning for late-stage pipeline programs, product marketing, reimbursement, and sales operations. After joining 
BioMarin in 2005 as one of the first sales and marketing employees, he held roles of increasing responsibility including Vice President, Commercial 
Operations, The Americas; Senior Vice President and Chief Commercial Officer; and Executive Vice President and Chief Commercial Officer. Mr. Ajer 
was integral in establishing BioMarin’s commercial infrastructure and global footprint and played a leadership role in the launches and growth strategies 
for BioMarin’s commercial brands including Brineura™, Vimizim®, Kuvan® and Naglazyme®. Prior to his time at BioMarin, Mr. Ajer served as Vice 
President, Global Transplant Operations at Genzyme Corporation and held positions in sales, marketing, and operations at SangStat Medical Corporation 
and ICN Pharmaceuticals. He received his B.S. degree in chemistry and MBA from the University of California, Irvine.

 
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Robert Chess, age 68, is the Chairman of our board of directors and has served as a director since May 1992. From March 2006 until January 
2007, Mr. Chess served as our Acting President and Chief Executive Officer, and from April 1999 to January 2007, served as Executive Chairman. He also 
served as our Co-Chief Executive Officer from August 1998 to April 2000, as President from December 1991 to August 1998, and as Chief Executive 
Officer from May 1992 to August 1998. Mr. Chess was previously the co-founder and President of Penederm, Inc., a publicly-traded dermatological 
pharmaceutical company that was sold to Mylan Laboratories. He has held management positions at Intel Corporation and Metaphor Computer Systems 
(now part of IBM), and was a member of the first President Bush’s White House staff as a White House Fellow and Associate Director of the White House 
Office of Economic and Domestic Policy. Mr. Chess serves on the board of directors and is the lead director of Twist Biosciences, a publicly-traded 
company in the synthetic biology field. He is Chairman of two private companies: Bighat Biosciences, which does ML-guided biologics design, and Issio 
Solutions, which is in the labor productivity software field. From 1997 until his retirement in 2009, Mr. Chess served on the board of directors of the 
Biotechnology Industry Organization (“BIO”). Mr. Chess served as Chairman of BIO’s Emerging Companies Section and Co-Chairman of BIO’s 
Intellectual Property Committee. Mr. Chess was the initial Chairman of Bio Ventures for Global Health and served on its Board through 2022. He currently 
is a member of the faculty of the Stanford Graduate School of Business, where he teaches courses in the MBA program on the healthcare industry and the 
business opportunity created by aging demographics and increased longevity. Mr. Chess received his B.S. degree in Engineering with honors from the 
California Institute of Technology and an M.B.A. from Harvard University. 
Roy A. Whitfield, age 71, has served as our director since August 2000 and as Lead Independent Director since January 2019. Mr. Whitfield is the 
former Chairman of the Board and Chief Executive Officer of Incyte Corporation (“Incyte”), a drug discovery and development company he co-founded in 
1991. From January 1993 to November 2001, Mr. Whitfield served as its Chief Executive Officer and from November 2001 until June 2003 as its 
Chairman. He also served as a director of Incyte from 1991 to January 2014. From 1984 to 1989, Mr. Whitfield held senior operating and business 
development positions with Technicon Instruments Corporation (“Technicon”), a medical instrumentation company, and its predecessor company, Cooper 
Biomedical, Inc., a biotechnology and medical diagnostics company. Prior to his work at Technicon, Mr. Whitfield spent seven years with the Boston 
Consulting Group’s international consulting practice. Mr. Whitfield received a B.S. in mathematics from Oxford University and an M.B.A. from Stanford 
University.
Information About Our Executive Officers
The following table sets forth the names, ages and positions of our executive officers as of March 6, 2025:
 
Name
 
Age
 
Position
Howard W. Robin
 
72
  Director, President and Chief Executive Officer
Sandra Gardiner
 
59
  Interim Chief Financial Officer (Principal Financial and Accounting Officer)
Mark A. Wilson, J.D.
 
53
  Senior Vice President and Chief Legal Officer
Jonathan Zalevsky, Ph.D.
 
50
  Senior Vice President and Chief Research and Development Officer
 
Howard W. Robin has served as our President and Chief Executive Officer since January 2007 and has served as a member of our board of 
directors since February 2007. Mr. Robin served as Chief Executive Officer, President and a director of Sirna Therapeutics, Inc., a biotechnology company, 
from July 2001 to November 2006 and from January 2001 to June 2001, served as their Chief Operating Officer, President and as a director. From 1991 to 
2001, Mr. Robin was Corporate Vice President and General Manager at Berlex Laboratories, Inc. (Berlex), a pharmaceutical products company that is a 
subsidiary of Schering, AG, and from 1987 to 1991 he served as Vice President of Finance and Business Development and Chief Financial Officer of 
Berlex. From 1984 to 1987, Mr. Robin was Director of Business Planning and Development at Berlex. He was a Senior Associate with Arthur Andersen & 
Co. prior to joining Berlex. He received his B.S. in Accounting and Finance from Fairleigh Dickinson University in 1974.
Sandra Gardiner has served as our Interim Chief Financial Officer since April 2023. Ms. Gardiner is a partner at FLG Partners, a leading CFO 
services firm in the Silicon Valley and a skilled business and finance executive with over 30 years of experience as an EVP and CFO at private and public 
companies in the Life Sciences sector. Prior to joining Nektar, she served as the Chief Financial Officer, Executive Vice President of Finance and 
Administration, Secretary and Treasurer of Pulse Biosciences, Inc., a bioelectric medicine company, from November 2019 through December 2022. Prior 
to joining Pulse Biosciences, she held CFO roles in both domestic and global companies, operating as a director to international subsidiaries throughout 
Europe, Asia Pacific and Latin America. Ms. Gardiner holds a B.A. in Management Economics from the University of California, Davis.

 
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Mark A. Wilson has served as our Senior Vice President and Chief Legal Officer since July 2022. Previously, Mr. Wilson served as our General 
Counsel since June 2016. Mr. Wilson joined Nektar in May 2002 and initially served as Patent Counsel and then as Senior Patent Counsel to the company 
prior to 2008 when he was promoted to Vice President, Intellectual Property. Before joining Nektar in 2002, Mr. Wilson was an associate at Reed & 
Associates, a patent law firm in Menlo Park, California, where he represented both start-up and Fortune 500 companies. Mr. Wilson received his J.D. from 
Seton Hall University, School of Law, and his B.S. in Pharmacy from Rutgers University, College of Pharmacy. He is registered to practice before the U.S. 
Patent and Trademark Office and is a member of the California Bar.
Jonathan Zalevsky has served as our Senior Vice President and Chief Research & Development Officer since October 2019. Dr. Zalevsky served 
as our Senior Vice President, Biology and Preclinical Development from April 2017 through November 2017 and served as our Senior Vice President, 
Research and Chief Science Officer from November 2017 to October 2019. From July 2015 through April 2017, Dr. Zalevsky served as our Vice President, 
Biology and Preclinical Development. Prior to joining Nektar, Dr. Zalevsky was Global Vice President and Head of the Inflammation Drug Discovery Unit 
at Takeda Pharmaceuticals. Prior to working at Takeda, Dr. Zalevsky held a number of research and development positions at Xencor, Inc. Dr. Zalevsky 
received his Ph.D. in Biochemistry from the Tetrad Program at the University of California, San Francisco. He received dual bachelor degrees in 
Biochemistry and Molecular, Cellular and Developmental Biology from the University of Colorado at Boulder.
Delinquent Section 16(a) Reports
Section 16(a) of the Exchange Act requires our directors and executive officers, and persons who beneficially own more than ten percent of a 
registered class of our equity securities, to file with the SEC initial reports of ownership and reports of changes in ownership of our common stock and 
other equity securities. Officers, directors and greater than ten percent beneficial owners are required by SEC regulations to furnish us with copies of all 
Section 16(a) forms they file. 
To our knowledge, based solely on our review of Forms 3, 4 and 5, and any amendments thereto, furnished to us or written representations that no 
Form 5 was required, we believe that during the fiscal year ended December 31, 2024, all filing requirements applicable to our executive officers and 
directors under the Exchange Act were met in a timely manner, except that one report related to the director annual equity award for each of Messrs Ajer, 
Chess, Greer, Whitfield and Dr. Brainard was not timely reported on a Form 4 and subsequently reported on a Form 5 filed with the SEC on January 17, 
2025.  
Code of Business Conduct and Ethics
We have adopted a code of business conduct and ethics that applies to all employees, including our principal executive officer, principal financial 
officer, principal accounting officer or controller, or persons performing similar functions. The code of business conduct and ethics is available on our 
website at http://ir.nektar.com/governance. Amendments to, and waivers from, the code of business conduct and ethics that apply to any director, executive 
officer or persons performing similar functions will be disclosed at the website address provided above and, to the extent required by applicable 
regulations, on a Current Report on Form 8-K filed with the SEC. 
Director Nomination Process
The Nominating and Corporate Governance Committee of our board of directors will consider for nomination any qualified director candidates 
recommended by our stockholders. Any stockholder who wishes to recommend a director candidate is directed to submit in writing the candidate’s name, 
biographical information, relevant qualifications and other information required by our bylaws to our Secretary at our principal executive offices before the 
deadline set forth in our bylaws. All written submissions received from our stockholders will be reviewed by the Nominating and Corporate Governance 
Committee at the next appropriate meeting. The Nominating and Corporate Governance Committee will evaluate any suggested director candidates 
received from our stockholders in the same manner as recommendations received from management, committee members or members of our board. Our 
nomination procedures are more fully described in our annual proxy statement and there have been no material changes to the procedures.  
 Audit Committee Independence
Mr. Greer currently serves as the Chairperson of the Audit Committee of our board of directors. The board of directors annually reviews the 
Nasdaq listing standards definition of independence for Audit Committee members and has determined that all members of our Audit Committee are 
independent. During the 2024 fiscal year, the board of directors determined that Mr. Greer also qualifies as an “audit committee financial expert” as defined 
in applicable SEC rules. The board of directors made a qualitative assessment of Mr. Greer’s level of knowledge and experience based on a number of 
factors, including his formal education and prior experience as a Chief Executive Officer and Chief Financial Officer at public reporting companies and as 
the chairperson of public company audit committees. The Audit Committee has adopted a written Audit Committee charter that is available on our 
corporate website at www.nektar.com. 

 
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Security Trading Policy
Our Security Trading Policy governs the purchase, sale and other transactions in our securities by our directors, officers and employees, and other 
covered persons, as well as the Company itself, and is reasonably designed to promote compliance with insider trading laws, rules and regulations, and 
Nasdaq listing rules, as applicable. As part of this policy, we prohibit our employees, our executive officers, and the non-employee members of our board 
of directors from short-term trading, options trading, trading on margin, share pledging, and all hedging transactions with respect to our securities. A copy 
of our insider trading policy is filed as Exhibit 19.1 to this Annual Report on Form 10-K.
Item 11. Executive Compensation. 
Compensation Discussion and Analysis
The following Compensation Discussion and Analysis is designed to provide our stockholders with an understanding of our executive 
compensation philosophy and decision-making process. Pursuant to the rules promulgated by the SEC, it discusses the principles underlying the structure 
of the compensation arrangements of our named executive officers (collectively, “NEOs”) identified in the table below. Unless noted otherwise, any 
reference within the Compensation Discussion and Analysis to decisions made by the board of directors refers to the decisions made by the independent 
members of the board of directors only. 
 
Name
Title 
Howard W. Robin
President and Chief Executive Officer 
Sandra Gardiner
Interim Chief Financial Officer 
Mark A. Wilson
Chief Legal Officer 
Jonathan Zalevsky, Ph.D.
Chief Research and Development Officer 
 
(1)
Ms. Gardiner was appointed our Interim Chief Financial Officer as of April 17, 2023. Ms. Gardiner is a partner at FLG Partners, and provides services as Interim Chief Financial 
Officer as an outside consultant pursuant to a consulting agreement between the Company and FLG Partners.
Compensation Highlights 
We consider the intellectual capital of our employees to be an essential driver of our business and key to the successful execution of our strategy. 
Accordingly, we aim to attract and retain high-performing executives, and our executive officer compensation program is designed to reward achievement 
of important business goals and to pay for performance. We also recognize that the biotechnology industry is characterized by high stock price volatility, 
uncertainty and intense competition and that the Company’s stock price at any given point in time may not be reflective of the Company’s 
accomplishments and performance over a sustained period. We use a variety of performance-based compensation elements, including long-term equity 
awards that have both time and performance-based vesting criteria and annual cash incentives that are based on both corporate performance and an 
individual’s performance, in order to align our NEOs’ interests with those of our stockholders. We believe this incentivizes our management team to invest 
in and to develop strategies that will create long-term growth and value for our stockholders. 
In 2024, our board of directors and Organization and Compensation Committee took the following key compensation actions:
•
Base salaries – We had previously not awarded any merit-based increases to our NEOs’ base salaries since 2022. For 2025, our NEOs’ 
2025 base salaries received a 2% increase from 2024 base salary levels to remain competitive within our peer group.
•
Alignment of CEO bonus to corporate goal achievement – Beginning in 2021, to further align CEO performance with the performance 
of the Company, we directly align the annual cash incentive that may be earned by the CEO with the corporate achievement rating 
determined by the board of directors.
•
Annual cash incentives for NEOs – Our NEOs, other than the CEO, may earn annual cash incentives that are based on the Company’s 
corporate performance (as measured against predefined corporate objectives set annually by the board of directors), which may be further 
adjusted based on individual performance.
(1)

 
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•
Long-term Incentives – Our long-term incentives are intended to motivate executives to deliver long-term stockholder value and to 
reward their achievement of specific business goals that will advance our business strategy. Consistent with our philosophy of pay for 
performance, in 2024 we granted our NEOs long-term equity awards in the form of stock options only, half of which have performance-
based vesting criteria that will vest only if the Company achieves certain defined performance milestones within five years. 
•
Performance-Based Compensation – We believe that a significant portion of our executive’s compensation should be performance-
based. Reflective of our “pay-for-performance” philosophy, the total compensation of our NEOs has generally aligned with our stock 
price performance and the total compensation received by our NEOs in 2023 and 2024 was reduced significantly in comparison to prior 
years.
•
Peer Group Alignment – In June 2024, we conducted our annual compensation peer group review, with input from our independent 
compensation consultant to align our peer group companies to appropriate selection criteria in light of our reorganized company and new 
strategic priorities.
•
Enhanced disclosures – In order to provide transparency for our stockholders and assist them in understanding the alignment between 
NEO pay and performance of corporate objectives, we have continued to provide enhanced disclosures concerning long-term incentive 
and short-term incentive grants, including specific targets and achievements met by the Company.
How Our Pay Program Works 
We believe that the design and structure of our pay program, and in particular our incentive plans, supports our business strategy while 
successfully aligning executive focus and interests with those of our stockholders. The business achievements described herein would not be possible 
without our talented executive team. We believe that each element chosen for our executive compensation program helps us to achieve our compensation 
objectives. We use the following framework to achieve our pay program objectives: 
 
Base Salary
Base salaries are set to be competitive within our industry with consideration for, 
among other things, an individual’s responsibilities, market data and individual 
contribution.
 
We have previously not awarded any merit-based increases to our NEOs’ base 
salaries since 2022. Our NEO’s 2024 salaries remained at the same level as 2022 
salaries. For 2025, our NEO’s 2025 base salaries received a 2% increase from 
2024 base salary levels to remain competitive within our peer group. 
Annual Cash Incentives
Annual incentives are intended to motivate and reward executives for the 
achievement of important short-term goals and milestones that we believe 
contribute to the creation of long-term stockholder value.
   
In 2024, annual cash bonuses were awarded to NEOs based on the Company’s 
achievement of pre-established corporate goals, including clinical development, 
research and business development, and financial objectives, as well as any 
significant achievements outside the pre-established goals. Consistent with 
historic practice since 2021, the cash incentive award for our CEO is based solely 
on the performance of the Company as determined by the board of directors.
Long-Term Equity Incentives
Our long-term incentives, which include performance-based vesting equity awards 
and time-based vesting equity awards, are intended to motivate executives to 
deliver long-term stockholder value and to retain our talented executive team.
   
In 2024, equity grants were awarded as a mix of time-based (50%) and 
performance-based (50%) stock options.
 

 
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Target Pay Mix 
Consistent with our pay for performance philosophy, we believe that a significant portion of our executives’ compensation should be “at-risk” and 
performance-based in order to motivate and align our executive officer’s interests with those of our stockholders. We emphasize performance-based 
compensation through two separate performance-based compensation methods: (i) our executives are eligible to receive annual cash incentives if they 
achieve short-term annual corporate objectives that are preapproved by the board of directors and (ii) we grant long-term equity awards that have 
substantial performance-based criteria designed to promote long-term growth and value creation. In 2024, 50% of the long-term equity incentives granted 
included performance-based vesting criteria. 
Relationship between Company Performance and Executive Pay 
The biotechnology industry is characterized by a higher risk profile and by more binary business outcomes than other, more traditional industries. 
This historically has led to high stock volatility for biotechnology companies. The graph below demonstrates that even with high levels of volatility in 
stock price, total compensation for Mr. Robin is generally aligned with our stock price performance over the past five years: 
 
 

 
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 Compensation Governance Practices 
Our Organization and Compensation Committee is responsible for oversight of our compensation program. A significant part of this oversight is 
aligning management interests with our business strategy and long-term goals, as well as the interests of our shareholders, while also mitigating excessive 
risk-taking. We continually take steps to strengthen and improve our executive compensation policies and practices. Highlights of our current practices 
include: 
 
What We Do
What We Do Not Do 
Deliver executive compensation primarily through performance-
based pay
Do not permit hedging transactions, share pledging, or short sales 
by employees or directors
 
 
Utilize equity awards of which a majority are performance-based 
and designed to deliver long term stockholder value
Do not permit repricing of stock options without shareholder 
approval 
 
 
Have a clawback policy covering cash and equity incentive 
compensation
Do not provide excessive perquisites 
 
 
Conduct a regular peer group review with our independent 
consultant to align the Company’s current profile
Do not provide funded pension or retirement plans (other than a 
matching contribution of up to $12,000 for 401(k) plan 
participants that we make available to all employees)
 
 
Have double trigger Change-in-Control (CIC) severance plan 
provisions
Do not provide excise tax gross-ups on CIC payments 
 
 
Have stock ownership guidelines applicable to our senior 
executive officers 
Do not accelerate vesting of equity awards on termination (unless 
in connection with a change of control of the Company) 
 
 
   
Utilize independent compensation consulting firm
Do not include the value of equity awards in severance 
calculations
 
 
Conduct a regular review of share utilization for equity 
compensation
No fixed employment terms 
 
 
   
Design our programs to mitigate undue risk
 
  No guaranteed bonus payments
 
 
   
Conduct an annual say-on-pay vote and regular shareholder 
outreach
 
   
 
Role Of Stockholder Say-On-Pay Votes and Engagement 
We provide our stockholders with the opportunity to cast an annual advisory vote to approve our executive compensation program (referred to as a 
“say-on-pay vote”). At our annual meeting of stockholders held in June 2024, approximately 93% of the votes cast by stockholders present or represented 
voted in favor of the proposal. After considering the 2024 say-on-pay vote, the Organization and Compensation Committee reaffirmed the design and 
elements of our executive compensation program. The board of directors and the Organization and Compensation Committee will continue to consider the 
outcome of our say-on-pay proposals and direct stockholder feedback when making future compensation decisions for the NEOs. Currently, we hold a non-
binding advisory vote on the compensation of our NEOs every year. 
Engaging with our stockholders helps us to understand how they view us, assists in setting goals and expectations for our performance, and 
identifies any emerging issues that may affect our strategies, corporate governance, compensation practices or other aspects of our operations. Throughout 
the year, members of Investor Relations and other subject-matter experts within the Company engage with our stockholders to remain well-informed 
regarding their perspective on current issues, as well as to address any questions or concerns. These teams serve as liaisons between stockholders, members 
of senior management and the Board. Additionally, our stockholder and investor outreach includes investor road shows, analyst meetings, and investor 
conferences and meetings. We seek stockholder feedback on executive compensation, governance and other matters throughout the year, concentrating our 
efforts on our largest stockholders. 

 
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Compensation Program Objectives and Philosophy 
In order to continue the execution and growth of our business as described above, we believe that it is vital that we continue to attract, motivate 
and retain highly experienced and skilled senior leadership by offering competitive base compensation and benefits, performance-based incentives, and the 
potential for long-term equity compensation in order to ensure that overall total compensation is within common market trends and to meet our talent 
objectives. Our goal is to structure a meaningful portion of executive compensation such that it will only have value if the senior leadership is successful in 
building significant long-term value for our business and our stockholders. 
Our current compensation programs for the NEOs are determined and approved by the Organization and Compensation Committee of our board of 
directors. The Organization and Compensation Committee takes into account Mr. Robin’s recommendations regarding the compensatory arrangements for 
our executive officers, although Mr. Robin does not participate in the deliberations or determinations of his own compensation. The other NEOs do not 
have any substantive role in determining or recommending the form or amount of compensation paid to any of our executive officers. Our current executive 
compensation programs are intended to achieve the following four fundamental goals and objectives to: 
•
Attract and retain an experienced, highly qualified and motivated executive management team to lead our business; 
•
Incentivize and reward sustained long-term performance by aligning significant elements of executive compensation with long-term 
stockholder value creation;
•
Provide economic rewards for achieving high levels of performance and individual contribution; and 
•
Provide total compensation that is competitive, taking into account the experience, skills and performance of the executives required to 
build and maintain the organization necessary to support our mission to be a leading research-based development stage biopharmaceutical 
company that discovers and develops innovative medicines in the field of immunotherapy. 
When structuring our executive compensation programs to achieve our goals and objectives, we are guided by the following philosophies: 
•
Alignment with Long-Term Stockholder Value Creation. Our compensation model is designed to align the economic interests of our 
executives with long-term stockholder value creation. Under our program, in 2024, 50% of the equity awards granted to our executive 
officers were performance-based equity awards that only vest if certain performance conditions are met. 
•
Pay for Performance. The objective of our executive compensation program is to deliver compensation above industry median for 
exceptional performance and deliver compensation below the median in performance periods where the Company does not perform well. 
We will also link each NEOs’ annual merit equity award to an assessment of individual performance or the achievement of what we 
believe to be rigorous and objective performance achievement milestones or criteria (such as initiating and advancing our clinical trials 
through new stages). 
•
Total Rewards Program. The total compensation program must balance pay for performance elements with selected static non-
performance-based elements in order to create a total rewards program that is competitive and will help us attract and retain highly 
qualified and motivated executives while also considering overall risk management for the Company and our shareholders. 
•
Customized Approach. The level of compensation provided to executives must take into account each executive’s role, experience, 
tenure, performance and expected contributions to our future success. 
•
Focus on Achievement of Fundamental Business Goals. The compensation program must be structured so that executives are 
appropriately incentivized to achieve our short- and long-term goals that are viewed as fundamental to driving long-term value in our 
business.
We designed our total compensation program to combine short- and long-term components, cash and equity, and fixed and contingent payments, 
in proportions that we believe are appropriate to achieve each of our fundamental compensation philosophies as described above. It was our intent to design 
the structure of the compensation program to provide appropriate incentives to reward executives for achieving our long-term goals and objectives, some of 
the most important of which are building and advancing a robust drug candidate pipeline, including conducting clinical trials, entering into new 
collaboration partnerships and executing on our current collaborations, increasing the skill level and efficiency of our organization and 

 
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improving our financial position. We believe that our compensation program has helped us both recruit and retain superior executive talent to continue to 
build an organization capable of executing on our mission to become a leading research-based development stage biopharmaceutical company. 
Compensation Determination Process 
Role of Organization and Compensation Committee 
The Organization and Compensation Committee is responsible for establishing the compensation programs of the Company’s CEO, NEOs and 
other executives of the Company. It also administers the Company’s equity-based and performance-based compensation plans, including plans under which 
restricted stock units or stock options are awarded. Accordingly, it is responsible for reviewing base salary and cash and equity incentives payable to 
executives, including the Company’s CEO and NEOs, and recommending to the board of directors for approval a total compensation package for each 
executive. The Organization and Compensation Committee also has the authority to grant restricted stock units and options to purchase shares of the 
Company’s Common Stock to all participants under the Company’s equity award plans, and to determine all terms and conditions of such awards. 
Role of Management 
To aid the Organization and Compensation Committee in its responsibilities, our CEO provides the committee with recommendations relating to 
the performance and achievements of each of the NEOs (other than himself). The Organization and Compensation Committee gives considerable weight to 
the CEO’s performance evaluations of the other NEOs because he has direct knowledge of the criticality of their work, performance and contributions. The 
Organization and Compensation Committee does not consult with any other executive officers with regard to its decisions. The CEO does not participate in 
the Organization and Compensation Committee’s deliberations or decisions regarding his own compensation. 
Role of Compensation Consultant 
In 2024, the Organization and Compensation Committee continued to retain the services of Aon’s Human Capital Solutions practice, a division of 
Aon, plc (Aon) as its independent executive compensation consultant due to its extensive analytical and compensation expertise in our industry. In this 
capacity, Aon has advised the Organization and Compensation Committee on compensation matters related to the executive and director compensation 
programs including: 
•
executive and director market pay analysis;
•
reviewing employee equity award framework;  
•
reviewing and, when appropriate, suggesting changes to the compensation peer group;  
•
development and refinement of executive pay programs and governance practices; and  
•
assistance in reviewing the Compensation Discussion and Analysis and other proxy statement disclosures.  
The Organization and Compensation Committee has the sole authority to engage and terminate Aon’s services, as well as to approve its 
compensation. Aon makes recommendations to the committee but has no authority to make compensation decisions on behalf of the committee or the 
Company. Aon reported to the Organization and Compensation Committee and had direct access to the chairperson and the other members of the 
committee. Beyond data and advice related to executive and director compensation matters and equity plan design and assistance with proxy statement 
disclosures, Aon did not provide any other consulting services to us in 2024. 
The Organization and Compensation Committee conducted a specific review of its relationship with Aon in 2024 and determined that Aon’s work 
did not raise any conflicts of interest. Aon’s work has conformed to the independence factors and guidance provided by the Dodd-Frank Wall Street 
Reform and Consumer Protection Act of 2010, the SEC and Nasdaq. 
Use of Market Data and Peer Group Analysis 
We regularly review the compensation practices of our peers in response to the fast-moving nature of the biotechnology industry, including merger 
and acquisition activity, and changes in product pipeline and business stage. As a result of the Company having a combination of multiple drug candidates 
in diverse therapeutic areas, a mix of wholly-owned and partnered drug products, and, previously, a legacy proprietary manufacturing operation, it is very 
challenging to identify truly comparable companies. Historically, we conduct an annual peer group review in June of each year. 

 
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In June 2023, we engaged Aon to conduct a review and assessment of our peer group. Previously, we had selected our peer group companies by 
considering companies in a comparable sector and stage with market capitalizations between 0.5x to 3.0x of our market capitalization at the time of review. 
However, a company’s market capitalization can at times be misaligned with market expectations. We believe that, due to current market conditions and in 
light of the fact that our market valuation has been trading below our cash value, the use of market capitalization as the primary criteria for selecting our 
peer group would not best capture an appropriate peer group that is comparable to our company. In consultation with Aon, we calculated and examined the 
ratio of market capitalization to cash value within peers to determine a median “cash value” multiple, which we applied to our cash value at the time of 
review to derive an implied valuation of the Company. We then considered for our peer group, companies in a comparable sector and stage with market 
capitalizations between 0.5x to 3.0x of our implied valuation and further selected our peer group based on comparable financial profile, business and 
product focus, and development stage. As a result, in June 2023 the Organization and Compensation Committee approved a selection of 19 peer group 
companies. 
In June 2024, the Organization and Compensation Committee reviewed with Aon our peer group and determined that the same metrics from 2023 
should be used in setting the 2024 peer group, which peer group is utilized by the Organization and Compensation Committee in evaluating 2025 
compensation. 
As a result, the following peer group was used approved by the Organization and Compensation Committee for evaluating 2024 - 2025 
compensation decisions. 
 
4D Molecular Therapeutics 
BioAtla
Kezar Life Sciences
Alector
bluebird bio, Inc.
Kodiak Sciences
Allakos
CytomX Therapeutics
Olema Pharmaceuticals 
ALX Oncology 
Erasca
ORIC Pharmaceuticals 
Annexon
Gossamer bio
RAPT Therapeutics
Aura Biosciences
IGM Biosciences 
 
 
Compared to the 2023 peer group, the 2024 peer group differs in that two companies, Alpine Immune Sciences and NGM Bio, were removed on 
account that these two companies had either been acquired or were in the process of being acquired.  
Given that our peer group companies have different market capitalizations than the Company, the Organization and Compensation Committee also 
reviews equity and total direct compensation data for our executives against the compensation for similarly situated executives at peer companies contained 
in surveys. Although the Organization and Compensation Committee reviewed and discussed the compensation data for the peer group companies to help 
inform executive compensation decisions, it does not set compensation at any specific level or percentile based solely on the peer group data. The peer 
group data and general industry compensation survey data is used only as one reference point considered in making compensation decisions. Other factors 
considered include an assessment of individual and company performance, competitive market practices, the number of unvested stock options held by the 
executive and average exercise price (i.e., the retention value) of these options, the number of unvested RSUs, the individual’s overall contributions, and 
stockholder dilution. However, we do not use a formula or assign a particular weight to any one factor in determining cash and equity award levels. 
Design and Elements of Our Compensation Program 
In 2024, the executive compensation structure featured three primary elements: 
•
Base salary; 
•
Short-term cash incentives, based on the Company’s achievement of pre-established corporate performance objectives as well as individual 
performance (except for the CEO, whose short-term cash incentive is based solely on the Company’s performance); and 
•
Long-term incentives, awarded as an equal mix of time- and performance-based option grants. 
Using the above three elements as a foundation, the Organization and Compensation Committee consulted with Aon, its independent executive 
compensation consultant, to design a compensation program that provides appropriate incentives and opportunities to the executives, aligns the vesting and 
performance milestones for equity awards with the Company’s strategic plan, reflects the Company’s current research and clinical developments, and 
remains market-aligned with industry peer groups, among others. Each element of our compensation program is discussed further below. 
*

 
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Base Salary
Base salary is the initial building block of compensation for the NEOs because it provides the executives with a specified basic level of cash 
compensation, which we believe is important to attract and retain highly skilled and experienced executives. The Organization and Compensation 
Committee determines base salaries for NEOs and other executive officers by considering competitive pay practices, cost of labor and compensation trends, 
individual performance and promotions, level and scope of responsibility, experience and internal pay equity. However, the Organization and 
Compensation Committee does not use a formula or assign a particular weight to any one factor. Rather, the determination of base salary levels is 
subjective, and base salaries are set at levels that we believe to be reasonably competitive. Since 2021 the Organization and Compensation Committee had 
not awarded any merit-based increases to our NEO’s base compensation. In December 2024, the Organization and Compensation Committee approved a 
2% merit-based increase to each of our NEO’s base compensation for 2025, which was below the merit-based increase awarded to other non-executive 
employees at the Company. 
 
Name
 
2023
 
 
2024
 
 
2025
   
2024 to 2025

% Increase
 
Howard W. Robin
$
1,084,590 
$
1,084,590 
$
1,106,282     
2%
Sandra Gardiner 
 
— 
 
— 
 
—     
— 
Mark A. Wilson
 
540,000 
 
540,000 
 
550,800     
2%
Jonathan Zalevsky, Ph.D.
 
703,490 
 
703,490 
 
717,560     
2%
 
(1)
Ms. Gardiner was appointed our Interim Chief Financial Officer as of April 17, 2023 and provides services as Interim Chief Financial Officer as an outside consultant pursuant to a 
consulting agreement between the Company and FLG Partners and is not employed or directly compensated by us, as further described under “Certain Relationships and Related 
Party Transactions.”
Short-term Incentives
We believe that our short-term incentive compensation program (“Incentive Compensation Plan”) rewards the achievement of important short-
term objectives that advance us toward our long-term strategic objectives. Our Incentive Compensation Plan applies to all employees and all executive 
officers other than our Chief Executive Officer, Mr. Robin, who is subject to his own separate annual performance-based bonus compensation arrangement. 
Since 2021, Mr. Robin’s bonus arrangement has been based on the same corporate objectives that we established under the Incentive Compensation Plan to 
greater align Mr. Robin’s short-term incentive compensation with the achievement of important short-term objectives of the Company. Consistent with our 
compensation philosophy of paying for performance and maintaining a flexible approach, we use the Incentive Compensation Plan to incentivize the NEOs 
to achieve important corporate goals while at the same time encouraging and rewarding excellent individual performance by recognizing and rewarding 
differences in performance between individual executives. 
2024 and 2025 Target Annual Incentive Opportunities 
The NEOs were each assigned a target annual incentive for 2024 ranging from 60% to 100% of base salary. The target annual incentive 
opportunities are determined based on each NEO’s experience, scope of responsibilities, and potential impact on the Company’s performance and approved 
by the Organization and Compensation Committee. The table below shows the target annual incentive assigned by us to each NEO as a percentage of base 
salary for 2024 and 2025. For 2025, no changes were made to the target annual incentive opportunities for each NEO. 
As further discussed below, each NEO’s (excluding Mr. Robin’s) annual bonus is determined based on a combination of the corporate 
performance rating and individual performance. As previously indicated, we began in 2021 to directly align Mr. Robin’s, the CEO, annual bonus award 
with the Company’s corporate performance rating so that Mr. Robin’s annual bonus is determined based solely on the Company’s corporate performance 
rating approved by the board of directors. Because Mr. Robin’s annual bonus is dependent solely on the performance of the Company, his target annual 
incentives since 2021 have been set at 100%.
 
x
 
2024 Target

Annual Incentives
 
 
2025 Target

Annual Incentives
 
Name
 
(% of Base Salary)
 
 
(% of Base Salary)
 
Howard W. Robin
 
100%
 
100%
Sandra Gardiner 
 
— 
 
— 
Mark A. Wilson
 
60%
 
60%
Jonathan Zalevsky, Ph.D.
 
60%
 
60%
 
(1)
Ms. Gardiner does not participate in our Incentive Compensation Plan
(1)
(1)

 
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Company Performance Objectives 
The board of directors annually establishes a number of important annual corporate goals that include clinical development, research, commercial, 
organizational and financial goals which the board of directors believes are essential to building long-term stockholder value. These goals are then used in 
our Incentive Compensation Plan to assess annual corporate performance. The relative weightings of these corporate goals are based upon the board of 
directors and CEO’s assessment of the importance of each goal in creating long-term value for the Company and our stockholders. The board of directors 
endeavors to select corporate goals that, if met by management, represent significant levels of annual achievement, although we believe the long-term 
nature of our drug development business does not lend itself to over-weighting the importance of annual goals. 
Following the conclusion of the annual performance period in December of each year, the level of achievement for each corporate goal is assessed 
by the board of directors. The board of directors determines whether each corporate goal has been met, exceeded, or not satisfied. If we achieve the target 
level of performance for all of the stated goals, the overall corporate performance rating would be 100%. In addition, in assessing corporate performance, 
the determination of corporate performance may be adjusted upward or downward by the board of directors as deemed appropriate to factor in other 
significant corporate events, either negative or positive, that occurred during the performance period, but were not reflected in the corporate goals 
previously set by the board of directors. After taking into account the level of attainment of each corporate goal and such other corporate performance 
factors as the board of directors may determine appropriate in reviewing performance for a particular year, the board of directors assigns an overall 
corporate performance rating for the year, which may range from 0% to 200%. The Organization and Compensation Committee then confirms the 
corporate performance rating for purposes of the Incentive Compensation Plan. The total available bonus pool under the Incentive Compensation Plan is 
determined by multiplying the corporate performance rating by the aggregate target bonus of all eligible participants which includes nearly all of the 
Company’s full-time employees. The aggregate of all individual bonuses awarded under the plan cannot exceed the total available bonus pool so that the 
total cost of bonuses ultimately reflects our assessment of overall corporate performance and is not inflated by the sum of individual performance ratings. 
The board of directors receives input and recommendation from the CEO regarding the Company’s performance and  determines the final corporate 
performance rating. 
After the corporate performance rating is determined, the individual performance of each NEO is reviewed by the Organization and Compensation 
Committee in consultation with Mr. Robin (other than with respect to his own performance) in order to determine the appropriate individual performance 
percentage rating to be assigned to the executive for the performance period. Mr. Robin’s individual performance is separately reviewed by the 
Organization and Compensation Committee. Each NEO’s (excluding Mr. Robin’s) actual annual bonus is based on a combination of the corporate 
performance rating and individual performance. The Incentive Compensation Plan does not provide for a specific allocation or weighting between 
corporate and individual performance. The actual annual bonus awarded for each NEO (excluding Mr. Robin) is solely determined by the Organization and 
Compensation Committee based on criteria that includes an assessment of individual performance (as measured by Mr. Robin’s evaluation of the 
performance of each NEO) and company performance, and the maximum payout for each NEO could be up to 200% of his or her cash target annual 
incentive (or, by the same token, an individual executive’s award could be reduced to 0% based on individual performance regardless of the corporate 
performance rating). Mr. Robin’s annual bonus award is directly aligned and based on the corporate performance rating that is recommended by the 
Organization and Compensation Committee and approved by the board of directors, which may range from 0% to 200%. Given the dynamic nature of our 
business, new priorities continually emerge such that the Organization and Compensation Committee wishes to retain the flexibility to tie a varying portion 
of annual incentive payouts to the individual achievement of a range of objectives. 
In December 2023, the board of directors formally approved the 2024 corporate objectives (“2024 Corporate Objectives”) set forth below. The 
2024 Corporate Objectives, relative weightings assigned to each of the categories of the objectives, whether the objectives were met, each category’s raw 
and weighted scores were as follows: 
2024 Corporate Objectives Table 
 
Category
Weight 
Objective
Results
Category Raw 
Score
Category 
Weighted Score 
Rezpegaldesleukin
50%
Maintain schedule for Phase 2b study of 
rezpegaldesleukin in atopic dermatitis 
(a)
 
 
 
1
 
 
 
0.5
Maintain schedule for Phase 2b study of 
rezpegaldesleukin in alopecia areata 
(a)  
Progress commercial product and manufacturing 
process for rezpegaldesleukin
(a)  
(1)
(2)
(3)
(4)

 
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Category
Weight 
Objective
Results
Category Raw 
Score
Category 
Weighted Score 
Research and Business 
Development
30%
Advance NKTR-255 for strategic partnerships 
(b)
 
0.5-0.9
 
0.15-0.27
Advance TNR2 program for strategic partnerships
(b)  
Financial 
20%
Reduce real estate obligations
(c)
0.6-0.9
0.12-0.18
Attain certain financial metrics
(a)
 
 
 
Corporate 
Performance Rating Range
0.77-0.95
(1)
(a) met or exceeded; (b) partially met; (c) not met; 
(2)
Objective was met. On January 10, 2025, we announced that we had completed target enrollment for our Phase 2b study of rezpegaldesleukin in patients with moderate-to-severe atopic 
dermatitis. The study remains on track for announcement of topline data from the 16-week induction treatment period in the first half of 2025.
(3)
Objective was met. On February 26, 2025, we announced that we had completed target enrollment for our Phase 2b study of rezpegaldesleukin in patients with severe to very severe 
alopecia areata. The study remains on track for announcement of topline data from the 36-week induction treatment period in the second half 2025.
(4)
Objective was met. Commercial drug substance process and product strategy established.
(5)
Objective was partially met. We are continuing select developmental studies of NKTR-255 in combination with cell therapies and checkpoint inhibitors while we evaluate strategic 
partnership pathways for the program. In December 2024, we announced the results of our Phase 2 proof-of-concept study evaluating NKTR-255 as an adjuvant treatment following 
CD19 directed CAR-T therapy in patients with relapsed/refractory large b-cell lymphoma. In November 2024, we presented late-breaking results from a Phase 2 study evaluating NKTR-
255 for the treatment of radiation induced lymphopenia after concurrent chemoradiation in locally advanced non-small cell lung cancer patients at the Society for Immunotherapy of 
Cancer Annual Meeting. In October 2024, we announced publication of the first clinical data from a Phase 1 study evaluating NKTR-255 in combination with an autologous bispecific 
CAR-T cell therapy targeting CD19 and CD22 in patients with relapsed or refractory B-cell acute lymphoblastic leukemia in Blood. 
(6)
Objective was partially met. We completed non-GLP toxicology studies and remain on track with our IND enabling studies for an IND submission in the second half of 2025. We 
continue to pursue potential value generating partnerships for the program. 
(7)
Object was not met. We have made progress in subleasing portions of our Mission Bay Facility, but did not meet the prescribed objective. 
(8)
Objective was exceeded. We attained and exceeded certain year-end financial objectives for the Company. 
The weighting of these objectives is reflective of our long-term focus as a research-based development stage biopharmaceutical company as well 
as our shorter-term business priorities. Our board of directors carefully considers the appropriate mix and weighting of corporate goals that will help 
motivate the performance of our executives as well as to build long-term growth for our business. A corporate performance rating in excess of 100% can 
only be achieved if the board of directors determines that the goal achievement for one or many of the goals substantially and qualitatively exceeded the 
target metrics, or the Organization and Compensation Committee uses its discretion to factor in other significantly positive corporate events that occurred 
during the performance period. The maximum potential corporate performance rating is 200%.
Actual Annual Incentives Earned for 2024 
Management prepared a report on the status of achievement of the 2024 Corporate Objectives that was reviewed by the Organization and 
Compensation Committee in November 2024. The Organization and Compensation Committee determined that four of the seven corporate goals identified 
above were met or exceeded. Each of the goals that was “met” had to achieve objective and specified measurement criteria established by the board of 
directors in the beginning of the year. If the measurement criteria for an objective was not fully met, partial credit was given depending on the level of 
achievement. As noted in the footnotes to the table, we have highlighted some of the specific achievements made within each objective category that was 
evaluated by the board of directors in determining whether such Corporate Objective was met. Due to the sensitivity and proprietary nature of our business 
and certain confidentiality obligations, we cannot specify all of the achievements made by the Company in furtherance of our 2024 Corporate Objectives. 
Using a raw score range for the achievement of the objectives within each category, and then calculating the weighted score for each category, the 2024 
corporate performance rating was between the range of 77% to 95% of the 2024 Corporate Objectives. 
However, in determining the final corporate performance achievement for 2024, the Organization and Compensation Committee also considered 
other significant business achievements of the Company in 2024 that were important in building strategic value, but were not reflected in the 2024 
Corporate Objectives because of the dynamic nature of the biotechnology industry and the volatility of the capital markets and access to financial 
resources. These notable achievements include: 
•
In March 2024, we completed a $30 million private placement financing (“PIPE”) with TCGX. In the PIPE, we sold 25 million shares of 
our common stock, in the form of a pre-funded warrant, at a price of $1.20 per share, which represented a premium of approximately 
80% to Nektar’s 30-day volume-weighted average price at the time of sale. 
(1)
(5)
(6)
(7)
(8)

 
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•
In March 2024, we and entities managed by Healthcare Royalty Management LLC (“HCR”) amended our 2020 Purchase and Sale 
Agreement to remove the cap on the royalties received by HCR in exchange for an additional $15.0 million payment to the Company.
•
In October 2024, we successfully negotiated and entered into an Amended and Restated Manufacturing and Supply Agreement with UCB 
Pharma to supply PEG reagent for their manufacturing of CIMZIA® and dapirolizumab pegol, which, among other things, extended the 
term of the agreement, committed UCB to “take or pay” minimum supply quantities and increased the selling price of the PEG reagent. 
•
In December 2024, we completed the sale of our manufacturing facility in Huntsville, Alabama to Ampersand Capital Partners, a Boston-
based private equity firm, for consideration of $64.7 million in cash, net of transaction costs, and an approximate 20% equity interest at 
the time of close in Gannet BioChem, a newly-created Ampersand portfolio company. 
In view of these significant achievements, as well as the Company having met or exceeded a substantial number of the 2024 Corporate Objectives, 
the Organization and Compensation Committee recommended to the board of directors (which the board of directors subsequently approved) a corporate 
performance achievement of 90% for 2024. In addition, in recognition of the employees of the Company who made significant contributions in 2024 to the 
successful completion of enrollment for the Phase 2b atopic dermatitis study and other significant business achievements, the Organization and 
Compensation Committee approved an additional discretionary bonus pool for Mr. Robin to allocate additional cash awards in his discretion to eligible 
employees. 
The following table shows some of the highlights of each NEO’s performance in 2024. Each NEO’s contributions were instrumental to the 
Company’s achievement of the above accomplishments and objectives in 2024. 
 
Name 
Individual Performance Highlights 
Howard W. Robin
•
Guided the Company through four significant transactions, thereby further enhancing 
the Company’s cash position and extending its cash runway.
•
Focused the Company on maintaining the development timelines of 
rezpegaldesleukin to ensure top-line readouts in 2025.
 
 
Mark Wilson
•
Led the Company’s litigation strategy in its lawsuit against Eli Lilly and Company.
•
Part of the executive leadership team involved with the negotiation, and subsequent 
drafting, of agreements for the $30 million PIPE, the 2020 Purchase and Sale 
Agreement with HCR to generate a $15 million to the Company, the amended 
manufacturing and supply agreement with UCB, and the sale of our manufacturing 
facility in Huntsville, Alabama. 
 
 
Jonathan Zalevsky, Ph.D.
•
Further advanced rezpegaldesleukin’s development, including leading the 
Company’s effort that resulted in the Company’s February 2025 announcement that 
it had entered into a new clinical trial agreement to evaluate rezpegaldesleukin in 
patients with new onset Type 1 diabetes mellitus and maintaining on-track 
enrollment of our clinical trials in atopic dermatitis and alopecia areata. 
•
Led the pre-clinical study efforts for the development of NKTR-0165, which resulted 
in the first preclinical data for this program, showing that NKTR-0165 demonstrated 
selective enhancement of Treg cell function.
 

 
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The table below includes the actual 2024 bonuses, including as a percentage of the target opportunity, that we awarded the NEOs for 2024. Mr. 
Robin’s awarded annual incentive is directly aligned to the Company’s corporate performance rating, which was 90%. In determining the annual incentive 
for each of our other NEOs, our Organization and Compensation Committee considers the Company’s corporate performance rating, as well as each NEO’s 
individual performance and accomplishments highlighted above, in particular, the significant contributions and efforts each NEO made to the Company’s 
successful advancement of rezpegaldesleukin in its clinical trials and the sale of the Company’s Huntsville facility. Ms. Gardiner, our Interim Chief 
Financial Officer, provides services as an outside consultant and is not employed or directly compensated by us, as further described under “Certain 
Relationships and Related Party Transactions.” Ms. Gardiner does not participate in our Incentive Compensation Plan and did not receive any bonus 
payment in 2024. 
 
x
 
2024 Target Annual Incentives
   
2024 Earned Annual Incentives
 
Name
 
(% of Base
Salary)
 
 
($)
   
(% of Target Bonus)
To the nearest %
 
 
($)
 
Howard W. Robin
 
100%
$
1,084,590 
 
90%
$
976,131 
Mark A. Wilson
 
60%
$
324,000 
 
102%
$
336,600 
Jonathan Zalevsky, Ph.D.
 
60%
$
422,094 
 
104%
$
431,885 
 
Long-Term Incentives 
In accordance with our objective of aligning executive compensation with our stockholders’ interests, an important component of our executive 
compensation program are long-term incentive opportunities. Our current long-term incentive program for the NEOs generally consists of annual awards of 
equity compensation that are subject to multi-year time-based vesting schedules as well as performance-based vesting schedules. In some years, we have 
used a value-based approach for sizing equity awards, consistent with market practices. More recently, and in 2024, we adopted a “percent of ownership” 
approach.  Regardless of the approach, in determining the grant levels for equity awards, we generally consider a number of factors including an 
assessment of individual performance, competitive market practices, the number of unvested RSUs and stock options held by the executive and average 
exercise price (i.e., the retention value) of these stock options, the individual’s overall contributions, and stockholder dilution. However, we do not use a 
formula or assign a particular weight to any one factor in determining equity award levels. Rather, the determination of equity grant levels is subjective, 
and the Organization and Compensation Committee awards equity grants at levels it believes in its judgment are reasonably competitive and consistent 
with our philosophy that a substantial portion of our executives’ compensation should be performance-based and help to further link the interests of our 
executives with those of our stockholders, as well as to provide a retention incentive for the executive. 
2024 Grants 
We historically review our executive compensation and grant equity grants in December of each year. In 2022, in connection with our 
restructuring efforts, the Organization and Compensation Committee conducted its executive compensation review in July and August 2022 and “pulled 
forward” the timing of any annual equity grants that would have otherwise been considered in December 2022. No additional equity grants were made to 
our executives in 2022, which resulted in an 16-month gap in grant timing between the August 2022 and December 2023 grants. The Organization and 
Compensation Committee conducted their annual review of executive equity grants in December 2024 and evaluated the value of the equity compensation 
package of our executives, noting that the Company’s depressed stock price results in a significant portion of all existing options held by our executives to 
be “underwater” or trading below their strike price and reduces the value of any unvested equity of our executives compared to the value of potential new 
equity grants (based on market data) that our executives could receive at new positions at comparable companies, which increases retention risk. The 
Organization and Compensation Committee also considered, among other factors, the strategic goals and resources of the Company, each executives skills, 
experience and scope of responsibilities, the compensation practices of the Company’s peer group, equity grants previously awarded to each executive, and 
the recommendation of Aon. In order to balance the Company’s interests to motivate and incentivize our executives to perform highly and achieve business 
objectives, to retain talented and experienced executives and to maximize stockholder value, the Organization and Compensation Committee recommended 
to the board of directors (which the board of directors subsequently approved) that the equity grants to our executives in 2024 remain at the same level as 
the 2023 grants and consist of stock options only, with 50% subject to time-based vesting and 50% subject to performance-based vesting. The following 
equity grants were awarded to our NEOs in 2024. Ms. Gardiner did not receive any equity grants. 
 

 
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x
 
Stock Options 
(Number of Shares(#))
 
Name
 
Time-based
Awards (#) (50%)
   
Performance-based
Awards (#) (50%)
 
Howard W. Robin
 
1,300,000 
 
1,300,000 
Mark A. Wilson
 
325,000 
 
325,000 
Jonathan Zalevsky, Ph.D.
 
375,000 
 
375,000 
 
Time-Based Stock Options 
The Organization and Compensation Committee believes that the granting of time-based stock options are an important component of the equity 
vehicle mix. Stock options represent a direct alignment of executive interests with those of stockholders and motivate executives to achieve value-
enhancing objectives for the Company. Time-based stock options also create strong retention incentives for executive officers in a competitive market. In 
2024, 50% of the equity awards granted to our NEOs were time-based equity awards. The time-based stock options vest monthly over four years, subject to 
the executive’s continued service through the vesting date. 
Performance-Based Stock Options 
In 2024, 50% of the stock options granted to our executives were performance-based and subject to both time-based vesting and performance-
based vesting. These performance-based stock options vest only upon the achievement of defined performance criteria that are tied to our business strategy, 
which are set forth below. They help create an ownership culture, encourage individual contribution and provide a strong link between executive 
performance and the Company’s long-term value. In order to vest, within five years of grant of the performance-based stock options, the Company must 
achieve the following: 
•
66% of each executive’s 2024 performance-based stock options will vest at the start of a Phase 3 clinical trial for rezpegaldesleukin; and 
•
34% of each executive’s 2024 performance-based stock options will vest upon achievement of positive Phase 3 topline clinical results for 
rezpegaldesleukin in any indication. 
The Organization and Compensation Committee believed these performance criteria would be challenging to achieve and if achieved, would help 
create significant long-term stockholder value. These performance milestones were set to align the interest of our executives with those of the Company’s 
renewed strategic focus on advancing our lead drug candidate, rezpegaldesleukin. 
As in 2023, the Organization and Compensation Committee in 2024 only granted stock options as equity compensation to our NEOs. In years 
prior, our executive equity compensation package included additional components and vehicles such as time-based and performance-based RSUs and 
performance-based RSUs tied to relative total shareholder return performance. Given the business changes and current stage and size of our company, we 
believe that granting stock options provides the appropriate incentives for our executives to continue performing highly while maximizing stockholder and 
company value. The Organization and Compensation Committee will continue to evaluate our executive compensation program in light of the Company’s 
changing business developments and it may grant RSUs or other related awards tied to short-term stock value in the future when such approaches are 
believed to be in the best interests of the Company and its shareholders. 
Results of Outstanding Grants of Performance-Based Equity 
2020-2023 Grants 
The performance criteria associated with each of the performance stock options and RSUs granted to our senior executives and NEOs in 2020 
have not been met and thus, vesting of these performance-based stock options and RSUs has not occurred. If the performance criteria associated with these 
performance stock options and RSUs are not satisfied within five years of grant, the equity awards will be cancelled. In 2020 the Organization and 
Compensation Committee introduced a new component to our equity compensation in order to increase the percentage of equity grants to our senior 
executives that were subject to performance-based conditions and to reflect, at the time, the Company’s maturation into a biopharmaceutical company with 
a potential commercialized drug. In 2020 and 2021, our senior executives were granted new performance-based RSUs (“TSR RSUs”) that vest between 0% 
and 200% of the target award based on relative total shareholder return (TSR) performance as measured against the Nasdaq Biotechnology index over a 
two-year performance period. The performance period for the 2020 TSR RSUs was measured from December 18, 2020 to December 31, 2022 (the “2020 
TSR RSU Performance Period”). Following the 2020 TSR RSU Performance Period, the Organization and Compensation Committee engaged Aon to 
independently determine the Company’s TSR percentile rank within the Nasdaq Biotechnology Index. Aon determined that the Company’s performance 
measured at the 15th percentile, which pursuant to the terms of the TSR RSUs 

 
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grant, corresponds to a performance multiplier of 0%. Therefore, the Organization and Compensation Committee determined that none of the 2020 TSR 
RSUs that were granted to our senior executives and NEOs would vest. Accordingly, all 2020 TSR RSUs granted to our executives were cancelled. 
In 2021, our NEOs were granted certain performance-based stock options and RSUs (the “2021 Performance Grants”) that would only vest if the 
Company achieved the first commercial sale to a third party of bempegaldesleukin intended for use by end-user customers within five years of the award 
grant date. In anticipation of the expected data readouts in the first half of 2022 for the Phase 3 registrational trials studying bempegaldesleukin in 
combination with nivolumab and to prioritize achievement of the success of the bempegaldesleukin programs, in 2021 our NEOs also received a one-time 
grant of performance-based RSUs subject to performance-based vesting conditions (the “Bempegaldesleukin Performance Grants”). In order to vest, by 
June 1, 2022, the Company had to achieve certain primary endpoint objectives in the Phase 3 melanoma trial studying the combination bempegaldesleukin 
and nivolumab, which was not achieved. Subsequently, in 2022, we and BMS discontinued all clinical development activities of bempegaldesleukin. 
Although the performance period for the 2021 Performance Grants has not ended yet, due to the termination of our bempegaldesleukin development 
program, achievement of the performance criteria for the 2021 Performance Grants is no longer realistically feasible. All RSUs granted under 
Bempegaldesleukin Performance Grants were cancelled. As discussed above, our NEOs were also granted TSR RSUs in 2021. The performance period for 
the 2021 TSR RSUs was measured from December 16, 2021 to December 31, 2023 (the “2021 TSR RSU Performance Period”). Following the 2021 TSR 
RSU Performance Period, the Organization and Compensation Committee engaged Aon to determine the Company’s performance mercantile. Based on 
Aon’s determination of the Company’s percentile performance within the Nasdaq Biotechnology Index, the Organization and Compensation Committee 
determined that none of the 2021 TSR RSUs that were granted to our senior executives and NEOs would vest. Accordingly, all 2021 TSR RSUs granted to 
our executives were cancelled. 
The performance criteria associated with the performance-based stock options and RSUs granted to our senior executives and NEOs in 2022 have 
been met. The 2022 performance-based stock options and RSUs granted on August 15, 2022 began vesting after the Organization and Compensation 
Committee determined on November 18, 2024, that all required performance criteria had been achieved, which included the achievement of (i) a first 
patient dosed in a Nektar sponsored Phase 2 comparative study of NKTR-255 in conjunction with approved autologous CD19 CAR-T therapies and (ii) a 
first patient dosed in a clinical collaboration for NKTR-255 in combination with cell therapy with significant co-funding support of approximately 50% of 
one or more clinical studies. In accordance with the terms of the 2022 grants, on December 13, 2024 approximately 3/4th of the performance-based RSUs 
granted vested, which will be followed by continued quarterly pro-rata vesting of the remainder until August 15, 2025 and approximately 3/4th of the 
performance-based stock options granted vested, which will be followed by continued monthly pro-rata vesting of the remainder until August 15, 2025. 
The performance criteria associated with each of the performance stock options granted to our senior executives and NEOs in 2023 have not been 
met and thus, vesting of these performance-based stock options has not occurred. If the performance criteria associated with these performance stock 
options are not satisfied within three years of grant, the equity awards will be cancelled. 

 
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Other Compensation Policies and Practices for NEOs Directly Employed by the Company
Severance and Change of Control Benefits 
If the employment of an NEO is terminated by us without cause or by the executive for a designated good reason outside of the context of a 
change of control transaction, the executive would be entitled to severance benefits under the applicable agreement he or she entered into with the 
Company. Generally, these severance benefits include a cash severance payment based on the executive’s then-current annual base salary and the amount 
of his or her target annual incentive bonus, payment of COBRA premiums for up to a maximum of eighteen (18) months, and an additional twelve-month 
period to exercise vested stock options (an eighteen-month period for Mr. Robin and a three-month period for Mr. Wilson and Dr. Zalevsky). In order to 
attract and retain these NEOs in a competitive environment for highly skilled senior executive talent in the biotechnology and pharmaceutical industry and 
to provide an incentive to obtain a broad release of claims in favor of the Company, we determined it was often necessary to offer severance benefits in the 
case of a termination without cause or constructive termination outside the context of a change of control transaction. Many companies provide severance 
benefits for similar types of terminations of employment, and we believe that it is important for us to offer these severance benefits in order to continue to 
provide a competitive total compensation program. These NEOs would also be entitled to certain termination benefits upon a termination of employment 
because of death or disability.
We also maintain a Change of Control Severance Benefit Plan (the “CIC Plan”) that provides the NEOs with certain severance benefits if their 
employment is terminated in connection with a change of control. The CIC Plan was originally established in 2006, and no amendments have been made to 
the plan since that time that would increase the severance benefits available under the CIC Plan. Severance benefits under the CIC Plan are structured on a 
“double-trigger” basis, meaning that the executive must experience a termination without cause or resign for a specifically defined good reason in 
connection with the change of control in order for severance benefits to become payable under the CIC Plan. Like the severance benefits under the letter 
agreements, we believe that these change of control severance benefits are an important element of a competitive total compensation program. 
Additionally, we believe that providing change of control benefits should eliminate, or at least reduce, any reluctance of our NEOs and other key 
employees covered by the CIC Plan to diligently consider and pursue potential change of control opportunities that may be in the best interests of our 
stockholders. At the same time, by providing change of control benefits only upon the occurrence of an additional triggering event occurring in connection 
with the change of control transaction resulting in a job loss, we believe that this CIC Plan helps preserve the value of our key personnel for any potential 
acquiring company. 
Under the CIC Plan, the executive would be entitled to accelerated equity award vesting upon a termination described above. The other severance 
benefits under the CIC Plan are generally similar to the severance benefits described above; however, Mr. Robin’s cash severance would cover the two-
year period following termination and Company-paid COBRA coverage would be eighteen months. Outplacement services received within twelve months 
following separation, up to a maximum of $5,000, are provided to all participants. In addition, each of the NEOs would be entitled to full equity vesting 
and, except for Dr. Zalevsky, a “gross up” payment for any excise taxes imposed under Section 4999 of the Internal Revenue Code once a 10% cutback 
threshold is exceeded. The excise tax gross-up was included in the CIC Plan as originally adopted in 2006 to make the participants whole for any adverse 
tax consequences to which they may become subject under Section 4999 of the Internal Revenue Code and to avoid unintended differences in net severance 
based on individual factors like the date of hire and past option exercise decisions, which preserves the level of change of control severance protections that 
we have determined to be appropriate. At the time the CIC Plan was established, we believed this excise tax gross-up protection was a reasonable part of a 
competitive total compensation package and generally consistent with industry practice at the time. On April 5, 2011, the board of directors amended the 
CIC Plan to eliminate any “gross up” payments for any excise taxes imposed under Section 4999 of the Internal Revenue Code for participants who 
became eligible to participate in the CIC Plan on or after January 1, 2010. The board of directors decided to eliminate this tax gross-up provision under the 
plan for new participants based on its review of current industry practices. 
The “Potential Payments Upon Termination or Change of Control” section below describes and quantifies the severance and other benefits 
potentially payable to the NEOs directly employed by the Company. 
Other Benefits for NEOs Directly Employed by the Company
We believe that establishing competitive benefit packages for employees is an important factor in attracting and retaining highly-qualified 
personnel, including the NEOs. The employee NEOs are eligible to participate in all of our employee benefit plans, such as medical, dental, vision, group 
life, disability insurance, commuting and parking benefits, wellness benefits, travel and business meeting expenses paid or reimbursed, employee stock 
purchase plan and the 401(k) plan, in each case generally on the same basis as other employees. We do not offer a tax-qualified defined-benefit pension 
plan or any non-qualified defined benefit retirement plans, nor do we provide material perquisites to our executives. In 2024, we offered Mr. Robin third 
party local ground transportation and tax gross ups for such expenses. These ground transportation benefits serve business purposes, such as allowing Mr. 
Robin to safely increase his productivity by attending to business matters while in 

 
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transit. We also offered our NEO’s parking passes for use when commuting to the Company’s office. The parking benefits serve business purposes by 
facilitating our NEO’s commutes and increases their productivity. See the Summary Compensation Table below for additional information. 
Other Compensation Policies and Practices 
Clawback Policy
In June 2023, our board of directors adopted the Nektar Therapeutics Compensation Recovery Policy, a copy of which is filed as an exhibit to our 
Form 10-K for the year ended December 31, 2023. In accordance with rules and regulations of the SEC and Nasdaq listing standards, our policy provides 
that, in the event that we are required to prepare a material financial restatement, we will recover from any executive officer any incentive compensation 
erroneously paid or awarded in excess of what would have been based on the restated financials. This policy applies to any incentive compensation that is 
either granted or paid at any time during the period of three full fiscal years prior to the date on which the financial results applicable to such award or 
payment are restated. 
Policy Prohibiting Hedging and Pledging
Our Security Trading Policy prohibits our employees, our executive officers, and the non-employee members of our board of directors from short-
term trading, options trading, trading on margin, share pledging, and all hedging transactions with respect to our securities. 
Equity Awards Grant Policy
As discussed above, the Organization and Compensation Committee reviews our executive compensation at its regularly scheduled meeting in 
December of each year and then recommends to the board of directors to approve annual equity grants for our executives in December of each year. The 
Organization and Compensation Committee has also delegated certain limited authority to a committee comprised of management representatives to grant 
equity awards under our stock incentive plan to employees who are not executive officers or directors of the Company. Historically, we have granted equity 
awards to non-executive employees in December of each year in connection with annual performance reviews. In addition to the annual grants, equity 
awards may be granted at other times during the year to new hires, employees receiving promotions, and in other circumstances. We do not have any policy 
or practice to grant or determine the terms of equity awards in coordination with release of material non-public information.
Stock Ownership Guidelines 
Effective January 1, 2019 the Organization and Compensation Committee approved ownership guidelines for our executive officers, such that the 
CEO should own shares of our common stock equal to at least three times his or her base salary, and the employee NEOs should own shares of our 
common stock equal to at least one time their base salary. The minimum stock ownership level is to be achieved by each executive officer within five years 
of the date of his or her appointment to executive officer. As of December 31, 2024, each employee NEO met the minimum stock ownership guidelines or 
was within the five-year grace period provided by the plan. 
Tax And Accounting Considerations 
Deductibility of Executive Compensation 
Generally, Section 162(m) of the Code (“Section 162(m)”) disallows a federal income tax deduction for public corporations of remuneration in 
excess of $1 million paid in any fiscal year to certain specified executive officers. For taxable years beginning before January 1, 2018 (i) these executive 
officers consisted of a public corporation’s chief executive officer and up to three other executive officers (other than the chief financial officer) whose 
compensation is required to be disclosed to stockholders under the Exchange Act because they are our most highly-compensated executive officers and (ii) 
qualifying “performance-based compensation” was not subject to this deduction limit if specified requirements are met. 
Pursuant to the Tax Cuts and Jobs Act of 2017, which was signed into law on December 22, 2017 (the “Tax Act”), for taxable years beginning 
after December 31, 2017, the remuneration of a public corporation’s chief financial officer is also subject to the deduction limit. In addition, subject to 
certain transition rules (which apply to remuneration provided pursuant to written binding contracts which were in effect on November 2, 2017 and which 
are not subsequently modified in any material respect), for taxable years beginning after December 31, 2017, the exemption from the deduction limit for 
“performance-based compensation” is no longer available. In addition, under the Tax Act, once an executive becomes a “covered employee” under Section 
162(m), the individual will continue to be a “covered employee” as long as he or she remains employed by the company. Consequently, for fiscal years 
beginning after December 31, 2017, all remuneration in excess of $1 million paid to a 

 
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covered executive will not be deductible unless it qualifies for transitional relief applicable to certain binding, written performance-based compensation 
arrangements that were in place as November 2, 2017 or transitional relief for applicable to certain newly public companies. These changes will cause more 
of our compensation to be non-deductible under Section 162(m) in the future and will eliminate the Company’s ability to structure performance-based 
awards to be exempt from Section 162(m). 
Furthermore, on March 11, 2021, The American Rescue Plan Act of 2021 (the “ARPA”) was signed into law to assist in the economic and health 
recovery brought on by the COVID-19 pandemic. Beginning on or after January 1, 2027, the ARPA expands the applicability of Section 162(m) to also 
include the next five highest paid corporate officers so that the total number of covered employees subject to the $1 million deduction limitation will at 
least be 10. 
In designing our executive compensation program and determining the compensation of our executive officers, including our NEOs, the 
Organization and Compensation Committee considers a variety of factors, including the potential impact of the Section 162(m) deduction limit. While the 
Organization and Compensation Committee is mindful of the benefit of the full deductibility of compensation, it believes that we should not be constrained 
by the requirements of Section 162(m) where those requirements would impair our flexibility in compensating our executive officers in a manner that can 
best promote our corporate objectives. Therefore, the Organization and Compensation Committee has not adopted a policy that would require that all 
compensation be deductible, though it does consider the deductibility of compensation when making compensation decisions. The Organization and 
Compensation Committee may authorize compensation payments that are not fully tax deductible if it believes that such payments are appropriate to attract 
and retain executive talent or meet other business objectives. 
Accounting for Stock-Based Compensation 
We follow FASB ASC Topic 718 for our stock-based compensation awards. FASB ASC Topic 718 requires us to measure the compensation 
expense for all share-based payment awards made to our employees and non-employee members of our board of directors, including options to purchase 
shares of our common stock and other stock awards, based on the grant date “fair value” of these awards. This cost is recognized as an expense following 
the straight-line attribution method over the requisite service period. This calculation is performed for accounting purposes and reported in the executive 
compensation tables required by the federal securities laws, even though the recipient of the awards may never realize any value from such awards. 
Summary Compensation Table—Fiscal 2022-2024
 
Name and Principal Position (a)
  Year (b)   Salary ($) (c)     Bonus ($) (d)    
Stock

Awards

($)
 (e)
   
Option

Awards

($)
 (f)
   
Non-Equity

Incentive Plan

Compensation

($)  (g)
   
All Other

Compensation

($) (i)
   
Total

Compensation

($) (j)
 
Howard W. Robin
2024
 
1,084,590  
 
-  
 
-  
 
1,596,122  
 
976,131  
105,850
 
 
3,762,693  
President and Chief Executive Officer
2023
 
1,084,590  
 
-  
 
-  
 
927,160  
 
1,030,361  
 
93,465  
 
3,135,576  
 
2022
 
1,084,590  
 
-  
 
4,032,255  
 
5,409,410  
 
650,754  
 
98,821  
 
11,275,830  
Sandra Gardiner
2024
 
-  
 
-  
 
-  
 
-  
 
-  
460,850
 
 
460,850  
Interim Chief Financial Officer
2023
 
-  
 
-  
 
-  
 
-  
 
-  
 
376,300  
 
376,300  
Mark A. Wilson
2024
 
540,000  
 
-  
 
-  
 
399,030  
 
336,600  
21,697
 
 
1,297,327  
Chief Legal Officer
2023
 
540,000  
 
-  
 
-  
 
231,790  
 
307,800  
 
20,878  
 
1,100,468  
 
2022
 
527,500  
 
-  
 
1,629,478  
 
2,185,994  
 
194,400  
 
28,093  
 
4,565,465  
Jonathan Zalevsky, Ph.D.
2024
 
703,490  
 
-  
 
-  
 
460,420  
 
431,885  
15,825
 
 
1,611,620  
Chief Research and Development Officer
2023
 
703,490  
 
-  
 
-  
 
178,300  
 
400,989  
 
490,585  
 
1,773,364  
 
2022
 
703,490  
 
-  
 
1,325,673  
 
1,778,436  
 
253,256  
 
289,625  
 
4,350,480  
 
(1)
Ms. Gardiner was appointed our Interim Chief Financial Officer as of April 17, 2023. Ms. Gardiner is a partner at FLG Partners and provides services as Interim Chief Financial 
Officer as an outside consultant pursuant to a consulting agreement between the Company and FLG Partners (“Gardiner Consulting Agreement”), and is not employed or directly 
compensated by the Company.
(2)
Amounts reported represent the aggregate grant date fair value of RSU awards computed in accordance with Financial Accounting Standards Board Accounting Standards 
Codification Topic 718, Compensation-Stock Compensation (“FASB ASC Topic 718”), based on the closing price of the Company’s common stock on the grant date and excluding 
the effects of estimated forfeitures. For a complete description of the assumptions made in determining the valuation, please refer to (i) Note 13 (Stock-Based Compensation) to our 
Consolidated Financial Statements and (ii) similar footnotes to our audited financial statements in our annual reports on Form 10-K for prior years when the awards were granted.
(3)
50% of the annual equity awards granted to the NEOs in 2022 were performance-based with vesting only to the extent a specified performance-based vesting condition is satisfied 
within three years of grant. If the performance-based vesting condition is satisfied, then the performance-based equity awards also remain subject to a time-based vesting 
requirement. The amounts reported in the “Stock Awards” and “Option Awards” column of the table for 2022 include the grant date fair value of performance-based RSUs and stock 
options, as applicable for the year, based on the probable outcome (determined as of the grant date in accordance with generally accepted accounting principles) of the performance-
based conditions applicable to the awards which assumes maximum achievement of the underlying performance conditions.
(4)
Amounts reported represent the aggregate grant date fair value of the stock options granted in the applicable year computed in accordance with FASB ASC Topic 718, which 
excludes the effects of estimated forfeitures. For a complete description of the assumptions made in determining the 
(2)(3)
(4)(5)(6)(7)
(8)
(9)
(1)
(10)
(11)
(12)

 
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valuation, please refer to (i) Note 13 (Stock-Based Compensation) to our Consolidated Financial Statements and (ii) similar footnotes to our audited financial statements in our 
annual reports on Form 10-K for prior years when the awards were granted. 
(5)
50% of the annual equity awards granted to the NEOs in 2024 were performance-based with vesting only to the extent a specified performance-based vesting condition is satisfied 
within five years of grant. If the performance-based vesting condition is satisfied, then the performance-based equity awards also remain subject to a time-based vesting requirement. 
The amounts reported in the “Option Awards” column of the table for 2024 include the grant date fair value of performance-based stock options, as applicable for the year, based on 
the probable outcome (determined as of the grant date in accordance with generally accepted accounting principles) of the performance-based conditions applicable to the awards. 
Assuming maximum achievement of the underlying performance conditions, the grant date fair value of the annual equity awards would be $1,923,039 for Mr. Robin, $480,760 for 
Mr. Wilson, and $554,723 for Dr. Zalevsky. 
(6)
50% of the annual equity awards granted to the NEOs in 2023 were performance-based with vesting only to the extent a specified performance-based vesting condition is satisfied 
within three years of grant. If the performance-based vesting condition is satisfied, then the performance-based equity awards also remain subject to a time-based vesting 
requirement. The amounts reported in the “Option Awards” column of the table for 2023 include the grant date fair value of performance-based stock options, as applicable for the 
year, based on the probable outcome (determined as of the grant date in accordance with generally accepted accounting principles) of the performance-based conditions applicable to 
the awards which assumes maximum achievement of the underlying performance conditions.
(7)
50% of the annual equity awards granted to the NEOs in 2022 were performance-based with vesting only to the extent a specified performance-based vesting condition is satisfied 
within three years of grant. If the performance-based vesting condition is satisfied, then the performance-based equity awards also remain subject to a time-based vesting 
requirement. The amounts reported in the “Stock Awards” and “Option Awards” column of the table for 2022 include the grant date fair value of performance-based RSUs and stock 
options, as applicable for the year, based on the probable outcome (determined as of the grant date in accordance with generally accepted accounting principles) of the performance-
based conditions applicable to the awards which assumes maximum achievement of the underlying performance conditions.
(8)
Amounts reported for 2022, 2023 and 2024 represent amounts earned under the Incentive Compensation Plan for that year or, for Mr. Robin, under his amended and restated offer 
letter effective as of December 1, 2008.
(9)
Includes (i) life insurance premiums of $42,391, (ii) group term life insurance premiums of $49,704, (iii) a $12,000 contribution to the Company’s 401(k) plan and (iv) $1,755 for 
long term disability post tax.
(10)
Consists of consulting fees paid to FLG Partners, LLC, pursuant to the Gardiner Consulting Agreement, in connection with Ms. Gardiner’s services as Interim Chief Financial 
Officer.
(11)
Includes (i) life insurance premiums of $1,449, (ii) group term life insurance premiums of $2,843, (iii) a $12,000 contribution to the Company’s 401(k) plan, (iv) a $3,650 
contribution to the Health Savings Account, and (v) $1,755 for parking pass and tax gross-up.
(12)
Includes (i) life insurance premiums of $945, (ii) group term life insurance premiums of $2,880 and (iii) a $12,000 contribution to the Company’s 401(k) plan.
Description of Employment Agreements 
Each of the NEOs, other than Ms. Gardiner, has entered into our standard form of employment agreement and an offer letter or letter agreement. 
The form of employment agreement provides for protective covenants with respect to confidential information, intellectual property and assignment of 
inventions and also sets forth other standard terms and conditions of employment. The offer letter agreements do not provide for any minimum or 
guaranteed term of employment. To the extent an NEO entered into a letter agreement with us, the letter agreement(s) establish the compensation 
arrangements following separation from us under certain circumstances. Please see “Potential Payments upon Termination or Change of Control” below for 
more information on these separation arrangements. 
Grants of Plan Based Awards in 2024
The following table shows, for the fiscal year ended December 31, 2024, certain information regarding grants of plan-based awards to the NEOs(1). 
 
x
   
 
Estimated Future Payouts Under

Non-Equity Incentive Plan Awards
   
Estimated Future Payouts Under

Equity Incentive Plan Awards
   
 
 
   
 
 
Name (a)
 
Grant Date

(b)
 
Threshold

($) (c)
 
Target

($) (d)
   
Maximum

($) (e)
   
Threshold

(#) (f)
 
Target

(#) (g)
 
 
Maximum

(#) (h)
 
All Other

Stock

Awards:

Number of

Shares of

Stock or

Units (#) (i)
 
All Other

Option

Awards:

Number of

Securities

Underlying

Options

(#)  (j)
   
Exercise or

Base Price

of Option

Awards

($/sh)  (k)
   
Grant Date

Fair Value

of Stock

and Option

Awards

($)  (l)
 
Howard W. Robin
​
   
   
     
     
   
     
   
   
     
     
   
Annual Incentive Award
​
N/A  
     
1,084,59
0      
2,169,180    
   
     
   
   
     
     
   
Stock Options
​
12/13/2024  
   
     
     
     
1,300,000    
   
   
       
1.01      
961,519  
Stock Options
​
12/13/2024  
   
     
     
   
     
   
     
1,300,00
0      
1.01      
634,603  
x
​
   
   
     
     
   
     
   
   
     
     
   
Mark A. Wilson
​
   
   
     
     
   
     
   
   
     
     
   
Annual Incentive Award
​
N/A  
     
324,000      
648,000    
   
     
   
   
     
     
   
Stock Options
​
12/13/2024  
   
     
     
     
325,000    
   
   
       
1.01      
240,380  
Stock Options
​
12/13/2024  
   
     
     
   
     
   
     
325,000      
1.01      
158,650  
x
​
   
   
     
     
   
     
   
   
     
     
   
Jonathan Zalevsky
​
   
   
     
     
   
     
   
   
     
     
   
Annual Incentive Award
​
N/A  
     
422,094      
844,188    
   
     
   
   
     
     
   
Stock Options
​
12/13/2024  
   
     
     
     
375,000    
   
   
       
1.01      
277,361  
Stock Options
​
12/13/2024  
   
     
     
   
     
   
     
375,000      
1.01      
183,058  
 
(1)
Ms. Gardiner did not receive any equity grants in 2024 and does not participate in our Incentive Compensation Plan. 
(2)
Amounts reported represent the potential short-term incentive compensation amounts payable for our 2024 fiscal year under our Incentive Compensation Plan (or for Mr. Robin, the 
potential amounts payable under his offer letter). The amounts reported represent each NEO’s target and maximum possible payments for 2024. Because actual payments to the 
NEOs could range from 0% to 200% of their target bonus, no threshold 
(2)
(3)
(4)
(5)
(6)

 
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Table of Contents
payment amount has been established for the NEOs. The actual short-term incentive bonus amount earned by each NEO for 2024 is reported in Column (g) (Non-Equity Incentive 
Plan Compensation) of the Summary Compensation Table—Fiscal 2022-2024 above.
(3)
The performance-based stock option grants are subject to both a five-year time-based vesting requirement (monthly pro-rata vesting) and the achievement of specified performance 
criteria within five years of grant. For additional information regarding these equity awards, see the Outstanding Equity Awards At Fiscal Year-End For 2024, below.
(4)
These stock option grants are subject to a four-year monthly pro-rata time vesting requirement. 
(5)
The exercise price is the closing price of our common stock on the date of grant.
(6)
See Note 13 (Stock-Based Compensation) to our Consolidated Financial Statements for the relevant assumptions used to determine the grant date fair value of the stock options 
granted during 2024. The amounts reflected in this column for stock options granted during 2024 that are subject to performance-based vesting conditions represent the grant date 
fair value of these awards based on the probable outcome (determined as of the grant date in accordance with applicable accounting rules) of the performance-based conditions 
applicable to the awards.
Description of Plan-Based Awards 
Time-Based Stock Options. Each time-based stock option granted to the NEOs during 2024 may be exercised to purchase the designated number 
of shares of our common stock at an exercise price equal to the closing price of the underlying common stock on the grant date. Each NEO’s time-based 
stock option award granted in 2024 has a maximum term of eight (8) years and is subject to a vesting schedule that requires the executive’s continued 
service through the vesting date. The 2024 stock option awards granted to the NEOs will vest on a monthly pro-rata basis over a four-year period following 
the grant date, subject to the executive’s continued service through the vesting date. 
Performance-Based Stock Options. Each performance-based stock option granted to the NEOs during 2024 may be exercised to purchase the 
designated number of shares of our common stock at an exercise price equal to the closing price of the underlying common stock on the grant date. Each 
NEO’s performance-based stock option award granted in 2024 has a maximum term of eight (8) years and is subject to a vesting schedule that requires the 
executive’s continued service through the vesting date as well as the achievement of a separate performance condition. The 2024 stock option awards 
granted to the NEOs will vest on a monthly pro-rata basis over a five-year period following the grant date, subject to the executive’s continued service 
through the vesting date and contingent upon achievement of the following performance criteria within five (5) years following the grant date: (i) 66% of 
each executives 2024 performance-based stock options will vest at the start of a Phase 3 clinical trial for rezpegaldesleukin and (ii) 34% of each executives 
2024 performance-based stock options will vest upon achievement of positive Phase 3 topline clinical results for rezpegaldesleukin in any indication. 
Any stock options that are unvested upon an NEO’s termination of continuous employment or services will be forfeited without any value, unless 
the termination of continuous service is a result of death, in which event, subject to any restrictions in the stock option agreement or equity incentive plan, 
the stock option would become fully vested and exercisable as of the date of death. For Mr. Robin, in accordance with his letter agreements, if any stock 
options are unvested upon a termination of continuous employment as a result of a disability, 50% of the unvested stock options would become fully vested 
and exercisable as of the date of termination. In accordance with the letter agreements described above, any stock options that are vested upon termination 
of continuous service by us without cause or by the executive for a good reason resignation (as defined in the CIC Plan) will remain outstanding and 
exercisable for eighteen (18) months for Mr. Robin and three (3) months for Mr. Wilson and Dr. Zalevsky. This exercise period is also twelve (12) months 
if the termination of employment or continuous services is because of disability and is eighteen (18) months if the termination is a result of death. We also 
have the discretion to extend the applicable exercise period in connection with other terminations of employment. Any vested stock options that are not 
exercised within the applicable post-termination of employment exercise period will terminate. 
Under the terms of our 2017 Amended and Restated Performance Incentive Plan (2017 Plan), if there is a change of control of the Company, 
outstanding awards granted under the plan will generally become fully vested and, in the case of stock options, exercisable, unless the Organization and 
Compensation Committee provides for the substitution, assumption, exchange or other continuation of the outstanding awards. Any stock options that 
become vested in connection with a change of control generally must be exercised prior to the change of control, or they will be cancelled in exchange for 
the right to receive a cash payment in connection with the change of control transaction. In addition, outstanding awards held by our NEOs may vest, upon 
certain terminations of the NEO’s employment without cause or for a good reason resignation in connection with a change of control and in connection 
with terminations of employment resulting from disability or death. Please see the “Potential Payments Upon Termination or Change of Control” section 
below for a description of the vesting that may occur in such circumstances. 
In 2024 each NEO’s stock option award was granted under, and is subject to the terms of, the 2017 Plan. The plan is administered by the 
Organization and Compensation Committee, and this committee has the ability to interpret and make all required determinations under the plan. This 
authority includes making required proportionate adjustments to outstanding equity awards to reflect certain corporate transactions and making provision to 
ensure that participants satisfy any required withholding taxes. 

 
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Table of Contents
The NEOs are not entitled to any dividend equivalent rights on their stock option, and stock option awards are generally only transferable to a 
beneficiary of an NEO upon his death. 
Short-Term Incentive Compensation. For 2024, all of the NEOs were eligible to earn a short-term incentive compensation payment under the 
Incentive Compensation Plan or, for Mr. Robin, under an arrangement that mirrors the Incentive Compensation Plan in his amended and restated offer 
letter effective as of December 1, 2008. These opportunities are reflected in the “Estimated Possible Payouts Under Non-Equity Incentive Plan Awards” 
columns of the table above. Please see “Compensation Discussion and Analysis—Current Executive Compensation Program Elements—Short-Term 
Incentive Compensation” for a description of the material terms of the Incentive Compensation Plan and Mr. Robin’s related short-term incentive 
compensation arrangement. In 2024 each NEO received an incentive cash compensation payment for the 2024 performance period based on the Company’s 
achievement of corporate performance objectives and, except for Mr. Robin, his individual performance. As previously discussed, Mr. Robin’s annual 
bonus is determined based solely on the Company’s corporate performance rating approved by the board of directors. 

 
117
Table of Contents
Outstanding Equity Awards at Fiscal Year-End For 2024
The following table includes certain information with respect to the value of all unexercised stock options and outstanding equity awards 
previously awarded to the NEOs as of December 31, 2024. 
 
x
   
 
Option Awards
 
Stock Awards
 
Name (a)
 
Grant Date
 
Number of 

Securities 

Underlying 

Unexercised 

Options (#) 

Exercisable 

(b)
   
Number of 

Securities 

Underlying 

Unexercised 

Options (#) 

Unexercisable 

(c)
 
Equity 

Incentive 

Plan 

Awards: 

Number of 

Securities 

Underlying 

Unexercised 

Unearned 

Options 

(#) 

(d)
 
Option 

Exercise 

Price 

($) 

(e)
   
Option 

Expiration 

Date  

(f)
 
Number of 

Shares or 

Units of 

Stock 

That 

Have Not 

Vested 

(#) 

(g)
 
Market 

Value of 

Shares or 

Units of 

Stock 

That 

Have Not 

Vested 

($)  

(h)
   
Equity 

Incentive 

Plan 

Awards: 

Number of 

Unearned 

Shares, 

Units or 

Other 

Rights 

That 

Have Not 

Vested 

(#) 

(i)
 
Equity 

Incentive 

Plan 

Awards: 

Market or 

Payout 

value of 

Unearned 

Shares, 

Units or 

Other 

Rights 

That 

Have Not 

Vested 

($)

(j)
 
Howard W. Robin
12/15/2017    
151,250    
   
     
56.90    
12/14/2025  
   
     
   
   
x
12/15/2017    
151,250    
   
     
56.90    
12/14/2025  
   
     
   
   
x
12/14/2018    
138,350    
   
     
36.51    
12/13/2026  
   
     
   
   
x
12/14/2018    
138,350    
   
     
36.51    
12/13/2026  
   
     
   
   
x
12/12/2019    
167,650    
   
     
21.79    
12/11/2027  
   
     
   
   
x
12/12/2019    
167,650    
   
     
21.79    
12/11/2027  
   
     
   
   
x
12/12/2019    
44,600    
   
     
21.79    
12/11/2027  
   
     
   
   
x
12/18/2020    
190,650    
   
     
18.75    
12/17/2028  
   
     
   
   
x
12/18/2020  
     
   
190,650
   
18.75    
12/17/2028  
   
     
   
   
x
12/18/2020  
     
   
   
     
   
   
     
106,650
   
99,185  
x
12/16/2021    
167,812    
55,938
 
     
13.22    
12/15/2029  
   
     
   
   
x
12/16/2021  
     
   
223,750
   
13.22    
12/15/2029  
   
     
   
   
x
12/16/2021  
     
   
   
     
   
   
     
126,050
   
117,227  
x
8/15/2022    
638,750    
182,500
 
     
4.91    
8/14/2030  
   
     
   
   
x
8/15/2022    
638,750    
182,500
 
     
4.91    
8/14/2030  
   
     
   
   
x
8/15/2022  
     
   
   
     
   
102,657
   
95,471    
   
   
x
8/15/2022  
     
   
   
     
   
102,656
   
95,470    
   
   
x
12/13/2023    
433,333    
866,667
 
     
0.50    
12/12/2031  
   
     
   
   
x
12/13/2023  
     
   
1,300,000
   
0.50    
12/12/2031  
   
     
   
   
x
12/13/2024  
     
1,300,000
 
     
1.01    
12/12/2032  
   
     
   
   
x
12/13/2024  
     
   
1,300,000
   
1.01    
12/12/2032  
   
     
   
   
Sandra Gardiner
   
     
   
   
     
   
   
     
   
   
Mark A. Wilson
12/15/2017    
110,000    
   
     
56.90    
12/14/2025  
   
     
   
   
x
12/15/2017    
42,000    
   
     
56.90    
12/14/2025  
   
     
   
   
x
12/14/2018    
10,225    
   
     
36.51    
12/13/2026  
   
     
   
   
x
12/12/2019    
35,800    
   
     
21.79    
12/11/2027  
   
     
   
   
x
12/12/2019    
35,800    
   
     
21.79    
12/11/2027  
   
     
   
   
x
12/12/2019    
11,600    
   
     
21.79    
12/11/2027  
   
     
   
   
x
12/18/2020    
51,000    
   
     
18.75    
12/17/2028  
   
     
   
   
x
12/18/2020  
     
   
51,000
   
18.75    
12/17/2028  
   
     
   
   
x
12/18/2020  
     
   
   
     
   
   
     
28,550
   
26,552  
x
12/16/2021    
50,362    
16,788
 
     
13.22    
12/15/2029  
   
     
   
   
x
12/16/2021  
     
   
67,150
   
13.22    
12/15/2029  
   
     
   
   
x
12/16/2021  
     
   
   
     
   
   
     
37,800
   
35,154  
x
8/15/2022    
258,125    
73,750
 
     
4.91    
8/14/2030  
   
     
   
   
x
8/15/2022    
258,125    
73,750
 
     
4.91    
8/14/2030  
   
     
   
   
x
8/15/2022  
     
   
   
     
   
41,485
   
38,581    
   
   
x
8/15/2022  
     
   
   
     
   
41,484
   
38,580    
   
   
x
12/13/2023    
108,333    
216,667
 
     
0.50    
12/12/2031  
   
     
   
   
x
12/13/2023  
     
   
325,000
   
0.50    
12/12/2031  
   
     
   
   
x
12/13/2024  
     
325,000
 
     
1.01    
12/12/2032  
   
     
   
   
x
12/13/2024  
     
   
325,000
   
1.01    
12/12/2032  
   
     
   
   
Jonathan Zalevsky
   
     
   
   
     
   
   
     
   
   
x
3/16/2017    
21,250    
   
     
15.71    
3/15/2025  
   
     
   
   
x
4/18/2017    
36,459    
   
     
18.59    
4/17/2025  
   
     
   
   
x
6/15/2017    
77,084    
   
     
18.09    
6/14/2025  
   
     
   
   
x
11/15/2017    
87,500    
   
     
43.07    
11/14/2025  
   
     
   
   
x
12/15/2017    
37,625    
   
     
56.90    
12/14/2025  
   
     
   
   
x
12/14/2018    
48,400    
   
     
36.51    
12/13/2026  
   
     
   
   
x
12/14/2018    
48,400    
   
     
36.51    
12/13/2026  
   
     
   
   
x
10/1/2019    
150,000    
   
     
18.43    
9/30/2027  
   
     
   
   
x
12/12/2019    
71,550    
   
     
21.79    
12/11/2027  
   
     
   
   
x
12/12/2019    
71,550    
   
     
21.79    
12/11/2027  
   
     
   
   
x
12/12/2019    
20,100    
   
     
21.79    
12/11/2027  
   
     
   
   
x
12/18/2020    
71,500    
   
     
18.75    
12/17/2028  
   
     
   
   
x
12/18/2020  
     
   
71,500
   
18.75    
12/17/2028  
   
     
   
   
x
12/18/2020  
     
   
   
     
   
   
     
40,000
   
37,200  
x
12/16/2021    
70,500    
23,500
 
     
13.22    
12/15/2029  
   
     
   
   
(2)
(3)
(3) 
(4)
(5)
(6)
(4)
(5)
(7)
(8)
(9)
(10)
(7)
(11)
(6)
(12)
(1)
(4)
(5)
(6)
(4)
(5)
(7)
(8)
(9)
(10)
(7)
(11)
(6)
(12)
(4)
(5)
(6)

 
118
Table of Contents
x
   
 
Option Awards
 
Stock Awards
 
Name (a)
 
Grant Date
 
Number of 
Securities 
Underlying 
Unexercised 
Options (#) 
Exercisable 
(b)
   
Number of 
Securities 
Underlying 
Unexercised 
Options (#) 
Unexercisable 
(c)
 
Equity 
Incentive 
Plan 
Awards: 
Number of 
Securities 
Underlying 
Unexercised 
Unearned 
Options 
(#) 
(d)
 
Option 
Exercise 
Price 
($) 
(e)
   
Option 
Expiration 
Date  
(f)
 
Number of 
Shares or 
Units of 
Stock 
That 
Have Not 
Vested 
(#) 
(g)
 
Market 
Value of 
Shares or 
Units of 
Stock 
That 
Have Not 
Vested 
($)  
(h)
   
Equity 
Incentive 
Plan 
Awards: 
Number of 
Unearned 
Shares, 
Units or 
Other 
Rights 
That 
Have Not 
Vested 
(#) 
(i)
 
Equity 
Incentive 
Plan 
Awards: 
Market or 
Payout 
value of 
Unearned 
Shares, 
Units or 
Other 
Rights 
That 
Have Not 
Vested 
($)
(j)
 
x
12/16/2021  
     
   
94,000
   
13.22    
12/15/2029  
   
     
   
   
x
12/16/2021  
     
   
   
     
   
   
     
52,950
   
49,244  
x
8/15/2022    
210,000    
60,000
 
     
4.91    
8/14/2030  
   
     
   
   
x
8/15/2022    
210,000    
60,000
 
     
4.91    
8/14/2030  
   
     
   
   
x
8/15/2022  
     
   
   
     
   
33,750
   
31,388    
   
   
x
8/15/2022  
     
   
   
     
   
33,750
   
31,388    
   
   
x
12/13/2023  
83,333    
166,667
 
     
0.50    
12/12/2031  
   
     
   
   
x
12/13/2023  
     
   
250,000
   
0.50    
12/12/2031  
   
     
   
   
x
12/13/2024  
     
375,000
 
     
1.01    
12/12/2032  
   
     
   
   
x
12/13/2024  
     
   
375,000
   
1.01    
12/12/2032  
   
     
   
   
 
(1)
Ms. Gardiner was appointed our Interim Chief Financial Officer as of April 17, 2023. Ms. Gardiner is a partner at FLG Partners and provides services as Interim Chief Financial 
Officer as an outside consultant pursuant to a consulting agreement between the Company and FLG Partners and is not employed or directly compensated by the Company. Ms. 
Gardiner has not received any equity awards. 
(2)
The expiration date shown is the normal expiration date occurring on the eighth anniversary of the grant date, which is the latest date that the stock options may be exercised. Stock 
options may terminate earlier in certain circumstances, such as in connection with an NEO’s termination of employment or in connection with certain corporate transactions, 
including a change of control. 
(3)
Restricted stock unit market value is calculated based on $0.93 per share, the closing price of our common stock on December 31, 2024
(4)
The performance-based stock options are subject to both a four-year time-based vesting requirement (monthly pro-rata vesting) and the achievement of specified performance criteria 
within five years of grant, subject to the executive’s continued service through each vesting date. 
(5)
The performance-based RSUs are subject to both a three year time-based vesting requirement (quarterly pro-rata vesting) and the achievement of specified performance criteria 
within five years of grant, subject to the executive’s continued service through each vesting date.
(6)
The stock options vest pro-rata on a monthly basis over a period of four years from the date of grant, subject to the executive’s continued service through each vesting date.
(7)
The stock options vest pro-rata on a monthly basis over a period of three years from the date of grant, subject to the executive’s continued service through each vesting date.
(8)
The performance-based stock options are subject to both a three-year time-based vesting requirement (monthly pro-rata vesting) and the achievement of specified performance 
criteria within three years of grant, subject to the executive’s continued service through each vesting date. The Organization and Compensation Committee determined on November 
18, 2024 that all required performance criteria had been achieved. In accordance with the terms of the grant, on December 13, 2024 approximately 3/4th of the performance-based 
stock options granted vested, followed by continued monthly pro-rata vesting of the remainder until August 15, 2025. 
(9)
The RSUs vest pro-rata on a quarterly basis over a three-year period from the date of grant.
(10)
The performance-based RSUs are subject to both a three year time-based vesting requirement (quarterly pro-rata vesting) and the achievement of specified performance criteria 
within three years of grant, subject to the executive’s continued service through each vesting date. The Organization and Compensation Committee determined on November 18, 
2024 that all required performance criteria had been achieved. In accordance with the terms of the grant, on December 13, 2024 approximately 3/4th of the performance-based RSUs 
granted vested, followed by continued quarterly pro-rata vesting of the remainder until August 15, 2025.
(11)
The performance-based stock options are subject to both a three-year time-based vesting requirement (monthly pro-rata vesting) and the achievement of specified performance 
criteria within three years of grant, subject to the executive’s continued service through each vesting date.
(12)
The performance-based stock options are subject to both a five-year time-based vesting requirement (monthly pro-rata vesting) and the achievement of specified performance criteria 
within five years of grant, subject to the executive’s continued service through each vesting date.
(2)
(3)
(3) 
(4)
(5)
(7)
(8)
(9)
(10)
(7)
(11)
(6)
(12)

 
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Option Exercises and Stock Vested in 2024
The following table includes certain information with respect to the exercise of stock options and vesting of stock awards held by the NEOs during 
the fiscal year ended December 31, 2024. 
 
x
 
Option Awards
   
Stock Awards
 
Name (a)
 
Number of Shares

Acquired on Exercise (#) (b)
   
Value Realized on

Exercise ($) (c)
   
Number of Shares

Acquired on Vesting (#) (d)
   
Value Realized on

Vesting ($) (e)
 
Howard W. Robin
 
-     
- 
 
486,861   ​ 
525,301 
Sandra Gardiner
 
-     
- 
 
-   ​ 
- 
Mark A. Wilson
 
-     
- 
 
192,367   ​ 
207,269 
Jonathan Zalevsky, Ph.D.
 
-     
- 
 
163,900   ​ 
177,896 
 
(1)
The value realized upon the exercise of stock options is calculated by (a) subtracting the stock option exercise price from the market price on the date of exercise to get the realized 
value per share, and (b) multiplying the realized value per share by the number of shares underlying the stock options exercised.
(2)
The value realized upon vesting of RSUs is calculated by multiplying the number of RSUs vested by the market price on the vest date.
Potential Payments Upon Termination or Change of Control
The following section describes the benefits that may become payable to the employee NEOs in connection with their termination of employment 
with us or in connection with a change of control. Please see “Compensation Discussion and Analysis—Severance and Change of Control Benefits” for a 
discussion of how the payments and benefits presented below were determined. 
Severance Benefits—No Change of Control 
Mr. Robin is a party to certain letter agreement, which includes provisions for severance benefits upon certain terminations of employment that are 
not related to a change of control. Upon a termination of employment by us without Cause or by the executive for a Good Reason Resignation (as defined 
in the CIC Plan and described below), Mr. Robin would be entitled to the following severance benefits: (i) a cash severance payment equal to his total 
annual cash compensation target (including base salary and the target value of his annual incentive bonus, as such bonus target may be adjusted downward 
to take into account our performance through the fiscal quarter preceding termination), (ii) an extension of the exercise period for the vested and 
unexercised portion of all outstanding stock options held by him for up to eighteen (18) months following termination and (iii) payment of all applicable 
COBRA premiums for one year following the termination date. In order to receive the severance benefits described above, Mr. Robin must first execute an 
effective waiver and release of claims in favor of us. Mr. Robin’s cash severance payment would ordinarily be paid in a lump-sum within 60 days 
following the executive’s separation from service, although payment will be delayed to the extent required to comply with Section 409A of the Internal 
Revenue Code. 
Neither Dr. Zalevsky nor Mr. Wilson is a party to a letter agreement or our standard form executive employment agreement that provides for 
severance benefits upon certain terminations of employment that are not related to a change of control. Upon a termination of employment by us without 
Cause or by the executive for a Good Reason Resignation (as defined in the CIC Plan and described below), Dr. Zalevsky and Mr. Wilson would be 
entitled to the following severance benefits: (i) a negotiated cash severance payment, (ii) an extension of the exercise period for the vested and unexercised 
portion of all outstanding stock options held by them for up to three (3) months following termination and (iii) payment of all applicable COBRA 
premiums for the same period as the severance benefit following the termination date. In order to receive the severance benefit described above, Dr. 
Zalevsky and Mr. Wilson must first execute an effective waiver and release of claims in favor of us. Dr. Zalevsky’s and Mr. Wilson’s cash severance 
payment would ordinarily be paid in a lump-sum within 60 days following their separation from service, although payment will be delayed to the extent 
required to comply with Section 409A of the Internal Revenue Code. 
If an NEO’s employment with us terminates due to death, the executive’s outstanding unvested stock options will become fully vested and will be 
exercisable for up to eighteen months following termination pursuant to the terms of the Company’s equity incentive compensation plans and agreement, 
and the NEO’s RSUs will become fully vested and released. In addition, in the case of Mr. Robin, the executive’s estate would be entitled to a pro-rata 
portion of the target annual incentive bonus for the year in which his death occurred. 
If an NEO terminates employment with us as a result of disability, vested stock options will be exercisable for up to twelve months following 
termination pursuant to the terms of the Company’s stock option agreement. For Mr. Robin, he is also entitled to have 50% of outstanding unvested stock 
options become fully vested upon disability for stock options granted under the equity plan in place at time of grant in accordance with the terms and 
conditions of his offer letter agreement. The NEO’s unvested RSUs are forfeited. In addition, pursuant to his offer letter agreement, Mr. Robin would be 
entitled to receive a pro-rata portion of his target annual incentive bonus for the year of termination in the event of a termination due to disability. 
(1)
(2)

 
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Pursuant to our standard form employment agreement, following a termination of employment, each NEO will be subject to an indefinite 
restriction on the disclosure of our confidential information and a one-year non-solicitation restriction covering our customers and employees. 
The following table lists the estimated amounts that would become payable to each of the NEOs under the circumstances described above, 
assuming that the applicable triggering event occurred on December 31, 2024. 
 
Executive & Triggering Event
 
Estimated Value of

Cash Severance ($)
   
Estimated Value of

COBRA Benefits ($)
   
Estimated Value of

Vesting Acceleration ($)
   
Estimated Value of

Pro-Rata Bonus ($)
   
Value Total ($)
 
Howard W. Robin
     
     
     
     
   
Without Cause or Good Reason
 
2,060,721      
61,971  
 
-  
 
-  
 
2,122,692  
Disability
 
-      
-  
 
670,679  
 
1,084,590  
 
1,755,269  
Death
 
-      
-  
 
1,341,358  
 
1,084,590  
 
2,425,948  
Sandra Gardiner
 
-      
-  
 
-  
 
-  
 
-  
Mark A. Wilson
     
     
     
     
   
Without Cause or Good Reason
N/A    
N/A  
N/A  
N/A  
N/A  
Disability
 
-      
-  
 
-  
 
-  
 
-  
Death
 
-      
-  
 
372,364  
 
-  
 
372,364  
Jonathan Zalevsky, Ph.D.
     
     
     
     
   
Without Cause or Good Reason
N/A    
N/A  
N/A  
N/A  
N/A  
Disability
 
-      
-  
 
-  
 
-  
 
-  
Death
 
-      
-  
 
328,828  
 
-  
 
328,828  
 
(1)
The value of COBRA benefits are based upon actual rates as of December 2024
(2)
For purposes of this table, we have assumed that (i) the price per share of our common stock is equal to the closing price per share on the last trading day of the fiscal year ended 
December 31, 2024 ($0.93), (ii) the value of any stock options that may be accelerated is equal to the full “spread” value of such awards on that date, and (iii) the value of any RSUs 
that may be accelerated is equal to the underlying shares multiplied by $0.93.
(3)
Neither Dr. Zalevsky nor Mr. Wilson is a party to a letter agreement or our standard form executive employment agreement that provides for severance benefits upon certain 
terminations of employment that are not related to a change of control.
Severance Benefits—Change of Control 
Each of the employee NEOs is covered under the CIC Plan. The CIC Plan provides for certain severance benefits to these executives and our other 
employees covered by the plan upon certain terminations of employment occurring in connection with a change of control of us. 
If a change of control of the Company occurs, each employee NEO will be entitled to severance benefits under the CIC Plan if the executive’s 
employment is terminated by us or a successor company without Cause or by the executive for Good Reason Resignation (as defined in the CIC Plan), in 
each case within a period generally beginning on the date the agreement providing for a change of control is executed and ending twelve months following 
the change of control. Severance benefits under the CIC Plan include: (i) a cash severance payment equal to twelve (12) months of base salary (twenty-four 
(24) months for Mr. Robin) and the target value of the executive’s annual incentive bonus; (ii) payment by us of the same portion of the executive’s 
COBRA premiums as we pay for active employees’ group health coverage for up to twelve (12) months (eighteen (18) months for Mr. Robin) following 
termination; (iii) provision of up to $5,000 for outplacement services received within twelve (12) months following termination; (iv) accelerated vesting of 
all outstanding stock options and other outstanding equity awards; and (v) other than in the case of Dr. Zalevsky, a “gross up” payment to compensate the 
executive for excise taxes (if any) on payments that are considered “parachute payments” under Section 280G of the Internal Revenue Code and therefore 
subject to an excise tax imposed under Section 4999 of the Code, but only to the extent the excise tax cannot be avoided by reducing the severance benefits 
by an amount not exceeding 10% such that the executive receives a greater-after tax amount as a result of the “cut-back” in benefits. In April 2011, the 
board of directors amended the CIC Plan so that this “gross up” benefit is not available for new hires following January 1, 2010 but is grandfathered for 
employees who joined the CIC Plan before that date so long as they are not promoted to a position such that he or she would be entitled to additional 
benefits under the plan. Accordingly, Dr. Zalevsky is not entitled to this “gross up” benefit as he joined the CIC Plan after January 1, 2010. In order to 
receive the severance benefits described above, the executive must first execute an effective waiver and release of claims in favor of us pursuant to a 
separation and release agreement. Each executive’s cash severance payment will ordinarily be paid in a lump-sum within 60 days following the executive’s 
separation from service, although payment will be delayed to the extent required to comply with Section 409A of the Internal Revenue Code. 
(1)
(2)

 
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For the purposes of the CIC Plan, a Good Reason Resignation means a resignation upon the occurrence of one or more of the following events: (i) 
assignment of any authority, duties or responsibilities that results in a material diminution in the executive’s authority, duties or responsibilities as in effect 
immediately prior to the change of control; (ii) assignment to a work location more than 50 miles from the executive’s immediately previous work location, 
unless such reassignment of work location decreases the executive’s commuting distance from his or her residence to the executive’s assigned work 
location; (iii) a material diminution in the executive’s monthly base salary as in effect on the date of the change of control or as increased thereafter; (iv) 
notice to the executive by us or the successor company during the 12-month period following the change of control that the executive’s employment will be 
terminated under circumstances that would trigger severance benefits under the CIC Plan but for the designation of a date for termination that is greater 
than 12 months following the change of control and (v) for Mr. Robin, if he does not serve in his same position in the successor company or is not 
appointed to the board of directors of the successor company. In order for a Good Reason Resignation to occur, the executive must first give us timely 
written notice of the grounds for good reason resignation, and we must have failed to cure such condition after a period of 30 days. 
Pursuant to the CIC Plan, the separation and release agreement that each of the NEOs will be required to execute to receive severance benefits 
under the plan will also require each executive to agree to continue to be subject to the restrictions on the disclosure of our confidential information in his 
or her employment agreement, to non-solicitation restrictions and to certain other restrictions. 
Had a change of control occurred (where outstanding equity awards were assumed, continued or substituted by a successor entity) during the 2024 
fiscal year and had the employment of each of the NEOs terminated on December 31, 2024 under one of the qualifying circumstances described above, 
each executive would have been entitled to receive the estimated benefits set forth in the table below. 
 
Executive & Triggering Event
 
Estimated Value of

Cash Severance ($)
   
Estimated 

Value of 

Welfare and 

Outplacement 

Benefits ($)
   
Estimated Value of

Vesting Acceleration

($)
   
Estimated 

Amount 

Forfeited by 

Executive ($)
   
Estimated Value of 

Excise Tax 

Gross-Up 

($)
   
Estimated Total ($)
 
Howard W. Robin
 
4,338,360     
97,956     
1,341,358     
- 
 
-     
5,777,674 
Mark A. Wilson
 
864,000     
47,722     
372,364     
- 
 
-     
1,284,086 
Jonathan Zalevsky, Ph.D.
 
1,125,584     
17,280     
328,828     
- 
 
-     
1,471,692 
 
(1)
This amount includes estimated COBRA premiums based upon actual rates as of December 2024 and up to $5,000 for outplacement services.
(2)
Pursuant to the terms of our equity compensation plans, these NEOs would also have been entitled to this same full equity acceleration (i) if a corporate transaction (as defined in the 
applicable plan) occurred and the surviving or acquiring corporation refused to assume outstanding equity awards or substitute similar replacement awards for outstanding equity 
awards or (ii) upon the acquisition by any person of beneficial ownership of 50% or more of the combined voting power of our shares in a transaction that is not a corporate 
transaction as defined in the applicable plan. For purposes of this table, we have assumed that (i) the price per share of our common stock is equal to the closing price per share on the 
last trading day of the fiscal year ended December 31, 2024 ($0.93), (ii) the value of any stock options that may be accelerated is equal to the full “spread” value of such awards on 
that date, and (iii) the value of any RSUs that may be accelerated is equal to the underlying shares multiplied by $0.93.
(3)
Executives with a gross-up provision are required to forfeit payments up to 10% if it will avoid an excise tax exposure. 
CEO Pay Ratio
Under the Dodd-Frank Wall Street Reform and Consumer Protection Act, we are required to disclose the median of the annual total compensation 
of our employees, the annual total compensation of our President and CEO Howard Robin, and the ratio of these two amounts. 
We have estimated the median of the 2024 annual total compensation of our employees, excluding Mr. Robin, to be $407,377 as calculated in 
accordance with Item 402(u) of Regulation S-K. The annual total compensation of our President and CEO, as reported in the Summary Compensation 
Table is $3,762,693. The ratio of the annual total compensation of our President and CEO to the estimated median of the annual total compensation of our 
employees was 9 to 1. We believe this pay ratio is a reasonable estimate calculated in a manner consistent with SEC rules. 
We selected December 31, 2024 as the date to identify our median employee. We determined our median employee based on the sum of taxable 
wages for 2024, FASB ASC Topic 718 value of option and stock awards granted in 2024, and other compensation including taxable benefits of each of our 
employees, excluding Mr. Robin, earned in 2024. 
(1)
(2)
(3)

 
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Director Compensation Table—Fiscal 2024
Each of our non-employee directors participates in our Amended and Restated Compensation Plan for Non-Employee Directors (the “Director 
Plan”). Only our non-employee directors are eligible to participate in the Director Plan. The following table shows the fees earned or paid to our non-
employee directors for the fiscal year ended December 31, 2024. 
 
Name  (a)
 
Fees Earned or

Paid in Cash ($) (b)
   
Stock Awards ($) (c)
   
Option Awards

($)  (d)
   
All Other

Compensation ($) (e)
   
Total ($) (f)
 
Jeff Ajer
 
87,000      
-      
110,939      
-      
197,939  
Diana Brainard, M.D.
 
87,000      
-      
110,939      
-      
197,939  
Robert Chess
 
128,500      
-      
110,939      
-      
239,439  
Myriam Curet, M.D.
 
38,000      
-      
-      
-      
38,000  
R. Scott Greer
 
113,000      
-      
110,939      
-      
223,939  
Roy A. Whitfield
 
120,000      
-      
110,939      
-      
230,939  
 
(1)
Mr. Robin, our President and Chief Executive Officer, is not included in this table as he was an employee of the Company in 2024 and received no additional compensation for his 
services in his capacity as a director. Please see the “Summary Compensation Table – Fiscal 2022-2024” for information regarding the compensation Mr. Robin received as our 
President and Chief Executive Office. 
(2)
Amounts reported represent the aggregate grant date fair value of option awards computed in accordance with FASB ASC Topic 718, which excludes the effects of estimated 
forfeitures. For a complete description of the assumptions made in determining the valuation, please refer to Note 13 (Stock-Based Compensation) to our Consolidated Financial 
Statements. Each of our then-serving non-employee directors received a stock option for 120,000 shares for his or her annual stock option grant on September 18, 2024. As of 
December 31, 2024, each of our non-employee directors had the following number of stock options outstanding: Mr. Ajer: 342,750; Dr. Brainard: 262,120; Mr. Chess: 309,000; Mr. 
Greer:  309,000; and Mr. Whitfield: 309,000. 
(3)
Ms. Curet’s term as a director expired on June 8, 2024. As of December 31, 2024, Ms. Curet has 167,400 stock options outstanding. 
The 2024 compensation for the Company’s non-employee directors was recommended by the Organization and Compensation Committee to the 
Board following the receipt of a report from our independent compensation consultant, which in 2024 was Aon, which contained an analysis of prevailing 
market practices regarding levels and types of non-employee director compensation, including the non-employee director compensation practices of our 
2024 peer group set forth below in the section entitled “Compensation Discussion and Analysis”, and a comparative assessment of our non-employee 
director compensation to such peers and market practices. On at least an annual basis, qualified experts deliver a presentation to the Organization and 
Compensation Committee about recent developments and best practices related to non-employee director compensation. 
Effective January 1, 2024 the annual retainer for non-employee directors was $55,000 (“Annual Retainer”). In addition to the Annual Retainer, the 
Chairperson of the Board of Directors received an additional annual retainer of $50,000 for a total of $105,000, and the Independent Lead Director of the 
Board of Directors received an additional annual retainer of $25,000 for a total of $80,000. The annual retainer amount was $25,000 for the Chair of the 
Audit Committee and $12,000 for members other than the Chair, $20,000 for the Chair of the Compensation Committee and $10,000 for members other 
than the Chair of the Compensation Committee, and $15,000 for the Chair of the Governance Committee and $8,000 for members other than the Chair of 
the Governance Committee. The Chair and members of any new committees would receive an additional annual retainer of $5,000, unless otherwise 
specified in the resolutions duly forming such new committee. 
In September of each year, each non-employee director is eligible to receive an equity award consisting of either all stock options or a 
combination of stock options and RSUs, as determined by the board of directors. These equity awards vest over a period of one year (monthly for stock 
options and upon the one year anniversary date for RSUs) and include a number of shares as determined annually by the board of directors. In September 
2024 our then-serving non-employee directors received 120,000 stock options. No RSUs were granted. Upon initial appointment to the board of directors, 
each non-employee director is eligible to receive an equity award consisting of either all stock options or a combination of stock options and RSUs. These 
initial equity awards vest over a period of three years from the date of appointment and will be at a level based on 180% of the most recent annual equity 
compensation grant to non-employee directors, as determined annually by the board of directors. The exercise price of stock options granted is equal to the 
closing price of the Company’s common stock on the grant date. Following completion of a non-employee director’s service on the board of directors, his 
or her stock options will remain exercisable for a period of thirty-six months (or, if earlier, the end of the maximum term of the option). The term of stock 
options granted to non-employee directors is eight years. In the event of a change of control, the vesting of each option or RSU award held by each non-
employee director will accelerate in full as of the closing of such transaction. In the event of death or disability, each RSU of the non-employee director 
will vest immediately. In the event a non-employee director ceases to continue their service on the board of directors at the Company’s annual shareholder 
meeting or any date thereafter, any unvested restricted stock unit award(s) of such non-employee director shall vest upon the cessation of such service on a 
pro rata basis calculated by the number of completed whole months of completed service during the vesting period. 
The Director Plan includes non-binding ownership guidelines for non-employee directors stating that each non-employee director should own 
shares of our common stock equal to at least three times the value of the annual board cash 
(1)
(2)
(3)

 
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retainer. The minimum stock ownership level was to be achieved by each non-employee director within five years of the date of his or her first appointment 
to the board of directors. Each of our non-executive directors with over five years of service on the board of directors has met the ownership guidelines 
previously, and all but one non-employee director currently meets the minimum stock ownership guidelines or is within the five-year grace period provided 
by the plan. The board of directors understands that the recent unexpected drop in the share price of our common stock has caused a temporal diminution in 
the value of the common stock owned by one non-executive director so as to currently equal less than three times the value of the annual board cash 
retainer. As allowed by our ownership guidelines, the board of directors will continue to monitor the situation and, if necessary, develop an alternative 
stock ownership guideline that reflects the intention of these guidelines. Our 2017 Plan also limits the aggregate value of cash compensation and the grant 
date fair value (computed in accordance with generally accepted accounting principles) of shares of Common Stock that may be paid or granted during any 
calendar year to any non-employee director with a maximum of $1,200,000 for existing non-employee directors and $2,200,000 for new non-employee 
directors. 
Organization and Compensation Committee Interlocks and Insider Participation
As of December 2024, the Organization and Compensation Committee consisted of three independent directors: Dr. Brainard, Mr. Ajer and Mr. 
Greer. No director who served on the Organization and Compensation Committee in 2024 was, or has been, an officer or employee of us, nor has any 
director had any relationships requiring disclosure under the SEC rules regarding certain relationships and related-party transactions. None of our executive 
officers served on the board of directors or the Organization and Compensation Committee (or other board committee performing equivalent functions) of 
another entity, one of whose executive officers served on our board of directors or Organization and Compensation Committee. 
Compensation Committee Report
The material in this report is being furnished and shall not be deemed “filed” with the SEC for purposes of Section 18 of the Exchange Act or 
otherwise subject to the liability of that section, nor shall the material in this section be deemed to be “soliciting material” or incorporated by reference in 
any registration statement or other document filed with the SEC under the Securities Act of 1933, as amended (the “Securities Act”), or the Exchange Act, 
except as otherwise expressly stated in such filing. 
The Organization and Compensation Committee has reviewed the Compensation Discussion and Analysis and discussed it with management. 
Based on its review and discussions with management, the committee recommended to our board of directors that the Compensation Discussion and 
Analysis be included in our annual report on Form 10-K for the fiscal year ended December 31, 2024 and in our 2025 proxy statement. This report is 
provided by the following independent directors, who currently comprise the committee: 
Diana Brainard, M.D. — Chairperson 
Jeff Ajer
R. Scott Greer 
Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters. 
Equity Compensation Plan Information
The following table presents aggregate summary information as of December 31, 2024, regarding the common stock that may be issued upon the 
exercise of options and rights under all of our existing equity compensation plans: 
 
Plan Category
 
Number of Securities to be

Issued Upon Exercise of

Outstanding Options &

Vesting of RSUs (a)
 
 
Weighted-Average Exercise

Price of Outstanding

Options ($) (b)
   
Number of Securities

Remaining Available for

Issuance Under Equity

Compensation Plans

(Excluding Securities

Reflected in Column (a))  (c)
 
Equity compensation plans approved by security holders
 
34,582     $
5.58     $
8,277  
Equity compensation plans not approved by security holders
 
-      
-     $
-  
Total
 
34,582     $
5.58     $
8,277  
 
Security Ownership of Certain Beneficial Owners And Management
The following table sets forth certain information regarding the ownership of our common stock as of February 27, 2025, by: (i) each director; (ii) 
each of our NEOs; (iii) all of our executive officers and directors as a group; and (iv) all those known by us to be beneficial owners of more than five 
percent of our common stock. 

 
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Unless otherwise noted below, the address of each beneficial owner listed in the table is c/o Nektar Therapeutics, 455 Mission Bay Boulevard 
South, San Francisco, California 94158. 
 
x
 
Beneficial Ownership**
 
Beneficial Owner
 
Number of Shares
   
Percent of Total
 
TCG Crossover GP II, LLC
 
20,046,350     
10.77%
BlackRock, Inc. 
 
15,969,345     
8.58%
The Vanguard Group
 
12,042,873     
6.47%
Samlyn Capital, LLC
 
9,667,048     
5.19%
Jeff Ajer
 
326,903   
*  
Diana Brainard, M.D.
 
240,680   
*  
Robert Chess
 
514,273   
*  
R. Scott Greer
 
562,574   
*  
Howard W. Robin
 
4,456,528     
2.39%
Roy A. Whitfield
 
546,750   
*  
Sandra Gardiner
 
-     
- 
Mark A. Wilson
 
1,393,929   
*  
Jonathan Zalevsky, Ph.D.
 
1,724,016   
*  
All executive officers and directors as a group (9 persons)
 
9,765,653     
5.25%
* Denotes ownership percentage less than 1%.
** This table is based upon information supplied by officers, directors and principal stockholders and Schedules 13G filed with the SEC. Unless otherwise indicated in the footnotes to this table, 
and subject to community property laws where applicable, we believe that each of the stockholders named in the table has sole voting and investment power with respect to the shares indicated as 
beneficially owned. Applicable percentages are based on 186,103,588 shares outstanding on March 6, 2025, adjusted as required by rules promulgated by the SEC.
(1)
Based solely on the Schedule 13G filed with the SEC on March 15, 2024 by TCG Crossover GP II, LLC, TCG Crossover Fund II, L.P, and Mr. Chen Yu. Each of TCG Crossover 
GP II, LLC, TCG Crossover Fund II, L.P, and Mr. Chen Yu have shared voting and dispositive power over 20,046,350 shares of our common stock (consists of (i) 3,000,000 shares 
of our common stock and (ii) 17,046,350 shares of our common stock, issuable upon exercise of certain Pre-Funded Warrants (as defined and described in our Current Report on 
Form 8-K filed with the SEC on March 4, 2024) and excludes 7,953,650 shares of our common stock issuable upon exercise of certain Pre-Funded Warrants because the Pre-Funded 
Warrants may not be exercised to the extent that doing so would result in the holder of the Pre-Funded Warrants (together with the holder’s affiliates and any other persons acting as 
a group together with the holder or any of the holder’s affiliates) beneficially owning more than 9.99% of the shares of our common stock then outstanding immediately after giving 
effect to such exercise). The principal business address of each of TCG Crossover GP II, LLC, TCG Crossover Fund II, L.P, and Mr. Chen Yu is 705 High St., Palo Alto, CA 94301. 
(2)
Based solely on the Schedule 13G filed with the SEC on November 8, 2024 by BlackRock, Inc., a parent holding company or control person in accordance with Rule 13d-1(b)(1)(ii)
(G). BlackRock, Inc. has the sole voting power with respect to 15,969,345 shares of our common stock and the sole dispositive power with respect to 15,969,345 shares of our 
common stock. The principal business address of BlackRock, Inc. is 50 Hudson Yards, New York, NY 10001.
(3)
Based solely on the Schedule 13G/A (Amendment No. 13) filed with the SEC on February 13, 2024 by The Vanguard Group Inc., a registered investment adviser in accordance with 
Rule 240.13d-1(b)(1)(ii)(E). The Vanguard Group has sole dispositive power over 11,974,323 shares of our common stock and shared dispositive power over 68,550 shares of our 
common stock. The address of The Vanguard Group is 100 Vanguard Blvd., Malvern, PA 19355.
(4)
Based solely on the Schedule 13G filed with the SEC on February 14, 2025 by Samlyn Capital, LLC, Samlyn, LP, and Mr. Robert Pohly. Each of Samlyn Capital, LLC, Samlyn, LP, 
and Mr. Robert Pohly  have shared voting and dispositive power over 9,667,048 shares of our common stock. The principal business address of each of Samlyn Capital, LLC, 
Samlyn, LP, and Mr. Robert Pohly is 500 Park Avenue, 2
nd Floor, New York, NY 10022. 
(5)
Includes 292,750 shares issuable upon exercise of stock options exercisable within 60 days of February 27, 2025. 
(6)
Includes 212,120 shares issuable upon exercise of stock options exercisable within 60 days of February 27, 2025.
(7)
Includes 259,000 shares issuable upon exercise of stock options exercisable within 60 days of February 27, 2025.
(8)
Includes 259,000 shares issuable upon exercise of stock options exercisable within 60 days of February 27, 2025. 
(9)
Includes (i) 3,482,318 shares issuable upon exercise of stock options exercisable within 60 days of February 27, 2025 and (ii) 410 shares owned by Mr. Robin’s spouse.
(10)
Includes (i) 259,000 shares issuable upon exercise of stock options exercisable within 60 days of February 27, 2025 and (ii) 71,500 shares held in trusts for Mr. Whitfield’s children 
under which Mr. Whitfield is the sole trustee. 
(11)
Ms. Gardiner does not own any common stock of the Company.
(12)
Includes (i) 1,113,910 shares issuable upon exercise of stock options exercisable within 60 days of February 27, 2025 and (ii) 7,107 shares issued pursuant to our Amended and 
Restated Employee Stock Purchase Plan. 
(13)
Includes 1,442,112 shares issuable upon exercise of stock options exercisable within 60 days of February 27, 2025.
 
Item 13. Certain Relationships and Related Person Transactions, and Director Independence.
We review all relationships and transactions between us and (i) any of our directors or executive officers, (ii) any nominee for election as a 
director, (iii) any security holder who is known to us to own beneficially or of record more than five percent of our common stock or (iv) any member of 
the immediate family of any of the foregoing. Our legal staff is primarily 
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(13)

 
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responsible for the development and implementation of processes and controls to obtain information with respect to related person transactions and for then 
determining, based on the facts and circumstances, whether the Company or a related person has a direct or indirect material interest in the transaction. In 
addition, the Audit Committee of the board of directors reviews and approves or ratifies any related person transaction that is required to be disclosed. In 
the course of its review and approval or ratification of a disclosable related person transaction, the committee considers: 
•
the nature of the related person’s interest in the transaction; 
•
the material terms of the transaction, including, without limitation, the dollar amount and type of transaction; 
•
the importance of the transaction to the related person; 
•
whether the transaction would impair the judgment of a director or executive officer to act in the best interest of the Company; and
•
any other matters the committee deems appropriate. 
Any member of the Audit Committee who is a related person with respect to a transaction under review may not participate in the deliberations or 
vote respecting approval or ratification of the transaction; however, such director may be counted in determining the presence of a quorum at a meeting 
where the Audit Committee reviews the transaction. 
As required under SEC rules, related party transactions that are determined to be directly or indirectly material to us or the related party are 
disclosed in our Annual Report on Form 10-K. Historically, we have not entered into transactions with related parties. On April 7, 2023, we entered into a 
consulting agreement with FLG Partners, LLC (“FLG Partners”), pursuant to which Sandra Gardiner, a partner at FLG Partners, provides consulting 
services to us and serves as our Interim Chief Financial Officer. In 2024, we paid FLG Partners $460,850 for the consulting services of Ms. Gardiner and 
$3,997 for reimbursement of out-of-pocket travel expenses. 
During the 2024 fiscal year, there were no other relationships or transactions between us and any related party for which disclosure is required 
under the rules of the SEC. 
Independence of the Board of Directors
As required under the Nasdaq Capital Market listing standards, a majority of the members of a listed company’s board of directors must qualify as 
“independent,” as affirmatively determined by the board of directors. Our board of directors consults with counsel to ensure that its determinations are 
consistent with all relevant securities and other laws and regulations regarding the definition of “independent,” including those set forth in pertinent Nasdaq 
listing standards, as in effect from time to time. 
Consistent with these standards, after review of all relevant transactions (if any) or relationships between each director, or any of his or her family 
members, and us, our senior management and our independent registered public accounting firm, the board has affirmatively determined that all of our 
directors are independent directors within the meaning of the applicable Nasdaq listing standards, except for Mr. Robin, our President and Chief Executive 
Officer. 
As required under applicable Nasdaq listing standards, in the 2024 fiscal year, our independent directors met five times in regularly scheduled 
executive sessions. The Lead Director, Mr. Whitfield, presided over such sessions at which only independent directors were present. 
The board of directors has three regularly constituted committees: an Audit Committee, an Organization and Compensation Committee, and a 
Nominating and Corporate Governance Committee. As of December 31, 2024, the Audit Committee members consist of Mr. Greer, Mr. Ajer, and Mr. 
Whitfield, the Organization and Compensation Committee members consist of Dr. Brainard, Mr. Ajer and Mr. Greer, and the Nominating and Corporate 
Governance Committee consist of Mr. Whitfield, Mr. Ajer, and Mr. Greer. The board of directors has determined that each member of each committee 
meets the applicable rules and regulations regarding “independence” and that each member is free of any relationship that would interfere with his or her 
individual exercise of independent judgment with regard to us. 
Item 14. Principal Accountant Fees and Services
Independent Registered Public Accounting Firm Fees and Services 
The following table represents aggregate fees billed to us for fiscal years ended December 31, 2024 and December 31, 2023 by Ernst & Young 
LLP, our independent registered public accounting firm. 
 

 
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x
 
Fiscal Year Ended
 
x
 
2024
   
2023
 
Audit Fees
$
1,641,815    $
1,901,271 
Audit Related Fees
 
-     
- 
Tax Fees
 
-     
- 
All Other Fees
 
5,200     
6,147 
Total
$
1,647,015    $
1,907,418 
 
Audit Fees. This category consists of fees related to the audit of our annual consolidated financial statements, review of interim condensed 
consolidated financial statements included in our quarterly reports on Form 10-Q, and services that are normally provided by the independent registered 
public accounting firm in connection with statutory audit, registration statements and other regulatory filings. 
Audit Related Fees. This category consists of fees related to assurance and related services by the independent registered public accounting firm 
that are reasonably related to the performance of the audit or review of our financial statements and are not reported under Audit Fees above. 
Tax Fees. This category consists of fees related to services provided for international tax compliance and tax consultation services. 
All Other Fees. This category consists of fees related to accessing Ernst & Young LLP’s online research database in 2024 and 2025. 
Pre-Approval Policies and Procedures 
The Audit Committee has adopted policies and procedures for the pre-approval of audit and non-audit services rendered by our independent 
registered public accounting firm, Ernst & Young LLP. The policy generally requires pre-approval for specified services in the defined categories of audit 
services, audit-related services and tax services up to specified amounts. Pre-approval may also be given as part of the Audit Committee’s approval of the 
scope of the engagement of the independent registered public accounting firm or on an individual explicit case-by-case basis before the independent 
registered public accounting firm is engaged to provide each service. The pre-approval of services may be delegated to one or more of the Audit 
Committee’s members, but the decision must be reported to the full Audit Committee at its next scheduled meeting. 
Prior to Ernst & Young LLP rendering services other than audit services, the Audit Committee would review and approve such non-audit services 
only if such services were compatible with maintaining Ernst & Young LLP’s status as our independent registered public accounting firm. 
The Audit Committee approved all fees described above. 

 
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PART IV
Item 15. Exhibits and Financial Statement Schedules
(a)
The following documents are filed as part of this report:
(1)
Consolidated Financial Statements:
The following financial statements are filed as part of this Annual Report on Form 10-K under Item 8 “Financial Statements and Supplementary 
Data.”
 
 
Page
Report of Independent Registered Public Accounting Firm (PCAOB ID: 42)
57
Consolidated Balance Sheets at December 31, 2024 and 2023
59
Consolidated Statements of Operations for each of the two years in the period ended December 31, 2024
60
Consolidated Statements of Comprehensive Loss for each of the two years in the period ended December 31, 2024
61
Consolidated Statements of Stockholders’ Equity for each of the two years in the period ended December 31, 2024
62
Consolidated Statements of Cash Flows for each of the two years in the period ended December 31, 2024
63
Notes to Consolidated Financial Statements
64
 
(2)
Financial Statement Schedules:
All financial statement schedules have been omitted because they are not applicable, or the information required is presented in our consolidated 
financial statements and notes thereto under Item 8 of this Annual Report on Form 10-K.
(3)
Exhibits.
Except as so indicated in Exhibit 32.1, the following exhibits are filed as part of, or incorporated by reference into, this Annual Report on Form 
10-K.
Item 16. Form 10-K Summary. 
 
None provided.
 
Exhibit
Number
 
Description of Documents
 
 
 
3.1(2)
  Certificate of Incorporation of Inhale Therapeutic Systems (Delaware), Inc.
 
   
3.2(3)
  Certificate of Amendment of the Amended Certificate of Incorporation of Inhale Therapeutic Systems, Inc.
 
   
3.3(4)
  Certificate of Ownership and Merger of Nektar Therapeutics.
 
   
3.4(5)
  Certificate of Ownership and Merger of Nektar Therapeutics AL, Corporation with and into Nektar Therapeutics.
 
   
3.5(6)
  Amended and Restated Bylaws of Nektar Therapeutics.
 
   
4.1
  Reference is made to Exhibits 3.1, 3.2, 3.3, 3.4, and 3.5.
 
   
4.2(4)
  Specimen Common Stock certificate.
 
   
4.3(7)
  Indenture dated October 5, 2015 by and between Nektar Therapeutics and Wilmington Trust, National Association, and TC Lending, LLC 
including the form of 7.75% Senior Secured Note due 2020.
 
   
4.4(28)
  Description of Securities.
 
   
10.1(8)
  Discretionary Incentive Compensation Policy++
 
   
10.2(8)
  Amended and Restated Change of Control Severance Benefit Plan.++
 
   
10.3(9)
  2012 Performance Incentive Plan.++

 
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Exhibit
Number
 
Description of Documents
 
 
 
 
   
10.4(10)
  Forms of Stock Option Agreement, Performance Stock Option Agreement, Restricted Stock Unit Agreement and Performance Restricted 
Stock Unit Agreement under the 2012 Performance Incentive Plan.++
 
   
10.5(11)
  Nektar Therapeutics Amended and Restated 2017 Performance Incentive Plan, as amended.++
 
   
10.6(12)
  Forms of Stock Option Agreement, Performance Stock Option Agreement, Non-Employee Director Stock Option Agreement, Restricted 
Stock Unit Agreement, Performance Restricted Stock Unit Agreement, and Non-Employee Director Restricted Stock Unit Agreement 
under the Amended and Restated 2017 Performance Incentive Plan.++
 
   
10.7(13)
  Employee Stock Purchase Plan, as amended and restated.++
 
   
10.8(14)
  Amended and Restated Compensation Plan for Non-Employee Directors.++
 
   
10.9(15)
  401(k) Retirement Plan.++
 
   
10.10(16)
  Form of Severance Letter for executive officers of the company.++
 
   
10.11(1)
  Amended and Restated Letter Agreement, executed effective on December 1, 2008, with Howard W. Robin.++
 
   
10.12(1)
  Amended and Restated Letter Agreement, executed effective on December 1, 2008, with John Nicholson.++
 
   
10.13(17)
  Letter Agreement, executed effective on December 10, 2009, with Stephen K. Doberstein, Ph.D.++
 
   
10.14(28)
  Transition, Separation and General Release Agreement, dated as of January 9, 2020, by and between Stephen K. Doberstein and Nektar 
Therapeutics. ++
 
   
10.15(19)
  Separation, Consulting and General Release Agreement effective as of October 15, 2019, by and between Nektar Therapeutics and John 
Nicholson.++
 
   
10.16(28)
  Employment Agreement effective as of December 4, 2019, by and between Nektar Therapeutics and John Northcott.++
 
   
10.17(16)
  Amended and Restated Built-to-Suit Lease between Nektar Therapeutics and BMR-201 Industrial Road LLC, dated August 17, 2004, as 
amended on January 11, 2005 and July 19, 2007.
 
   
10.18(18)
  Lease Agreement dated August 4, 2017, as amended by the First Amendment to Lease dated as of August 29, 2017, by and between ARE-
San Francisco No. 19, LLC and Nektar Therapeutics.
 
   
10.19(20)
  Settlement Agreement and General Release, dated June 30, 2006, by and between The Board of Trustees of the University of Alabama, The 
University of Alabama in Huntsville, Nektar Therapeutics AL, Corporation (a wholly-owned subsidiary of Nektar Therapeutics), Nektar 
Therapeutics and J. Milton Harris.
 
   
10.20(1)
  Exclusive Research, Development, License and Manufacturing and Supply Agreement, by and among Nektar AL Corporation, Baxter 
Healthcare SA, and Baxter Healthcare Corporation, dated September 26, 2005, as amended.+
 
   
10.21(1)
  Exclusive License Agreement, dated December 31, 2008, between Nektar Therapeutics, a Delaware corporation, and Novartis Pharma AG, 
a Swiss corporation.+
 
   
10.22(17)
  Supply, Dedicated Suite and Manufacturing Guarantee Agreement, dated October 29, 2010, by and among Nektar Therapeutics, Amgen 
Inc. and Amgen Manufacturing, Limited.+
 
   
10.23(21)
  License Agreement by and between AstraZeneca AB and Nektar Therapeutics, dated September 20, 2009.+
 
   
10.24(22)
  Collaboration and License Agreement dated as of May 30, 2016, by and between Daiichi Sankyo Europe GmbH and Nektar Therapeutics.
 
   

 
129
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Exhibit
Number
 
Description of Documents
 
 
 
10.25(18)
  License Agreement effective as of August 23, 2017, by and between Eli Lilly and Company and Nektar Therapeutics.
 
   
10.26(7)
  Purchase Agreement dated September 30, 2015 by and among Nektar Therapeutics and TC Lending, LLC and TAO Fund, LLC.
 
   
10.27(7)
  Pledge and Security Agreement dated October 5, 2015 by and among Nektar Therapeutics and TC Lending, LLC.
 
   
10.28(23)
  Purchase and Sale Agreement, dated as of February 24, 2012, between Nektar Therapeutics and RPI Finance Trust.+
 
   
10.29(24)
  Amendment No. 1 to License Agreement dated effective as of August 8, 2013, by and between Nektar Therapeutics and AstraZeneca AB.+
 
   
10.30(25)
  Investor Agreement, dated as of February 13, 2018, by and between Bristol-Myers Squibb and Company and Nektar Therapeutics.+
 
   
10.31(25)
  Strategic Collaboration Agreement, dated as of February 13, 2018, by and between Bristol-Myers Squibb and Company and Nektar 
Therapeutics.+
 
   
10.32(29)
  Co-Development Agreement, dated as of February 12, 2021, by and between SFJ Pharmaceuticals XII, L.P. and Nektar Therapeutics.+
 
   
10.33(28)
  Amendment No. 1 to Strategic Collaboration Agreement dated as of January 9, 2020, by and between Bristol-Myers Squibb and Company 
and Nektar Therapeutics.+
 
   
10.34(26)
  Share Purchase Agreement, dated as of February 13, 2018, by and between Bristol-Myers Squibb and Company and Nektar Therapeutics.
 
   
10.35(27)
  Office Lease, effective as of May 31, 2018, by and between Kilroy Realty Finance Partnership, L.P., and Nektar Therapeutics.
 
   
10.36(29)
  Purchase and Sale Agreement, dated December 16, 2020, by and between entities managed by Healthcare Royalty Management, LLC and 
Nektar Therapeutics.+
 
   
10.37(30)
  Amendment No. 2 to Strategic Collaboration Agreement dated as of January 12, 2022, by and between Bristol-Myers Squibb and Company 
and Nektar Therapeutics.+
 
   
10.38(31)
  Employment Transition, Separation and Consultation Agreement, dated as of June 29, 2022, by and between Nektar Therapeutics and John 
Northcott.++
 
   
10.39(32)
  Consulting Agreement between Nektar Therapeutics and FLG Partners, LLC dated April, 2023++
 
   
10.40(33)
  Employment Separation and Release Agreement effective as of June 19, 2023 by and between Nektar Therapeutics and Jillian B. 
Thomsen.++
 
   
10.41(34)
  Letter Agreement dated as of September 6, 2023 by and between Bristol-Myers Squibb and Company and Nektar Therapeutics.+
 
   
10.42(35)
  Amendment No. 1 to Purchase and Sale Agreement, dated December 16, 2020, by and between entities managed by Healthcare Royalty 
Management, LLC and Nektar Therapeutics.
 
   
19.1(36)
  Nektar Therapeutics Insider Trading Policy
 
   
21.1(36)
  Subsidiaries of Nektar Therapeutics.
 
   
23.1(36)
  Consent of Independent Registered Public Accounting Firm.

 
130
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Exhibit
Number
 
Description of Documents
 
 
 
 
   
24(36)
  Power of Attorney (reference is made to the signature page).
 
   
31.1(36)
  Certification of Nektar Therapeutics’ principal executive officer required by Rule 13a-14(a) or Rule 15d-14(a).
 
   
31.2(36)
  Certification of Nektar Therapeutics’ principal financial officer required by Rule 13a-14(a) or Rule 15d-14(a).
 
   
32.1*
  Section 1350 Certifications.
 
   
97
  Nektar Therapeutics Compensation Recovery Policy, dated June 8, 2023
 
   
99.1(36)
  Unaudited Pro Forma Condensed Consolidated Financial Statements for the year ended December 31, 2024
 
   
101.SCH**
  Inline XBRL Taxonomy Extension Schema Document.
101.CAL**
  Inline XBRL Taxonomy Extension Calculation Linkbase Document.
101.LAB**
  Inline XBRL Taxonomy Extension Label Linkbase Document.
101.PRE**
  Inline XBRL Taxonomy Extension Presentation Label Linkbase Document.
101.DEF**
  Inline XBRL Taxonomy Extension Definition Linkbase Document.
 
   
104**
  Cover Page Interactive Data File (formatted as inline XBRL with applicable taxonomy extension information contained in Exhibits 101).
 
+ Certain confidential portions (indicated by brackets and asterisks) have been omitted from this exhibit in accordance with the rules of the Securities and 
Exchange Commission.
++ Management contract or compensatory plan or arrangement.
* Exhibit 32.1 is being furnished and shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or 
otherwise subject to the liability of that section, nor shall such exhibit be deemed to be incorporated by reference in any registration statement or other 
document filed under the Securities Act of 1933, as amended, or the Securities Exchange Act, except as otherwise stated in such filing.
** Inline XBRL information is filed herewith.
(1)
Incorporated by reference to the indicated exhibit in Nektar Therapeutics’ Annual Report on Form 10-K for the year ended December 31, 2008.
(2)
Incorporated by reference to the indicated exhibit in Nektar Therapeutics’ Quarterly Report on Form 10-Q for the quarter ended June 30, 1998.
(3)
Incorporated by reference to the indicated exhibit in Nektar Therapeutics’ Quarterly Report on Form 10-Q for the quarter ended June 30, 2000.
(4)
Incorporated by reference to the indicated exhibit in Nektar Therapeutics’ Current Report on Form 8-K, filed on January 23, 2003.
(5)
Incorporated by reference to the indicated exhibit in Nektar Therapeutics’ Annual Report on Form 10-K for the year ended December 31, 2009.
(6)
Incorporated by reference to the indicated exhibit in Nektar Therapeutics’ Current Report on Form 8-K, filed on December 16, 2022.
(7)
Incorporated by reference to the indicated exhibit in Nektar Therapeutics’ Current Report on Form 8-K, filed on October 6, 2015.
(8)
Incorporated by reference to the indicated exhibit in Nektar Therapeutics’ Annual Report on Form 10-K for the year ended December 31, 2011.
(9)
Incorporated by reference to the indicated exhibit in Nektar Therapeutics’ Current Report on Form 8-K, filed on June 17, 2015.
(10)
Incorporated by reference to the indicated exhibit in Nektar Therapeutics’ Current Report on Form 8-K filed on December 17, 2015.
(11)
Incorporated by reference to the indicated exhibit in Nektar Therapeutics’ Quarterly Report on Form 10-Q for the quarter ended September 30, 2023.
(12)
Incorporated by reference to the indicated exhibit in Nektar Therapeutics’ Annual Report on Form 10-K for the year ended December 31, 2018.
(13)
Incorporated by reference to the indicated exhibit in Nektar Therapeutics’ Quarterly Report on Form 10-Q for the quarter ended June 30, 2020.

 
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(14)
Incorporated by reference to the indicated exhibit in Nektar Therapeutics’ Quarterly Report on Form 10-Q for the Quarter ended March 31, 2020.
(15)
Incorporated by reference to the indicated exhibit in Nektar Therapeutics Quarterly Report on Form 10-Q for the quarter ended June 30, 2004.
(16)
Incorporated by reference to the indicated exhibit in Nektar Therapeutics’ Quarterly Report on Form 10-Q for the quarter ended September 30, 2007.
(17)
Incorporated by reference to the indicated exhibit in Nektar Therapeutics’ Annual Report on Form 10-K for the year ended December 31, 2010.
(18)
Incorporated by reference to the indicated exhibit in Nektar Therapeutics’ Quarterly Report on Form 10-Q for the quarter ended September 30, 2017.
(19)
Incorporated by reference to the indicated exhibit in Nektar Therapeutics’ Quarterly Report on Form 10-Q for the quarter ended September 30, 2019.
(20)
Incorporated by reference to the indicated exhibit in Nektar Therapeutics’ Quarterly Report on Form 10-Q for the quarter ended June 30, 2006.
(21)
Incorporated by reference to the indicated exhibit in Nektar Therapeutics’ Quarterly Report on Form 10-Q for the quarter ended September 30, 2009.
(22)
Incorporated by reference to the indicated exhibit in Nektar Therapeutics’ Quarterly Report on Form 10-Q for the quarter ended June 30, 2016.
(23)
Incorporated by reference to the indicated exhibit in Nektar Therapeutics’ Quarterly Report on Form 10-Q for the quarter ended March 31, 2012.
(24)
Incorporated by reference to the indicated exhibit in Nektar Therapeutics’ Quarterly Report on Form 10-Q for the quarter ended September 30, 2013.
(25)
Incorporated by reference to the indicated exhibit in Nektar Therapeutics’ Quarterly Report on Form 10-Q for the quarter ended March 31, 2018.
(26)
Incorporated by reference to the indicated exhibit in Nektar Therapeutics’ Current Report on Form 8-K filed on February 14, 2018.
(27)
Incorporated by reference to the indicated exhibit in Nektar Therapeutics’ Quarterly Report on Form 10-Q for the quarter ended June 30, 2018.
(28)
Incorporated by reference to the indicated exhibit in Nektar Therapeutics' Annual Report on Form 10-K for the year ended December 31, 2019.
(29)
Incorporated by reference to the indicated exhibit in Nektar Therapeutics' Annual Report on Form 10-K for the year ended December 31, 2020.
(30)
Incorporated by reference to the indicated exhibit in Nektar Therapeutics' Annual Report on Form 10-K for the year ended December 31, 2021.
(31)
Incorporated by reference to the indicated exhibit in Nektar Therapeutics’ Quarterly Report on Form 10-Q for the quarter ended September 30, 2022.
(32)
Incorporated by reference to the indicated exhibit in Nektar Therapeutics’ Quarterly Report on Form 10-Q for the quarter ended March 31, 2023.
(33)
Incorporated by reference to the indicated exhibit in Nektar Therapeutics’ Quarterly Report on Form 10-Q for the quarter ended June 30, 2023.
(34)
Incorporated by reference to the indicated exhibit in Nektar Therapeutics’ Quarterly Report on Form 10-Q for the quarter ended September 30, 2023.
(35)
Incorporated by reference to the indicated exhibit in  Nektar Therapeutics’ Quarterly Report on Form 10-Q for the quarter ended March 31, 2024. 
(36)
Filed herewith.
Item 16. Form 10-K Summary
Not applicable.

 
132
Table of Contents
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.
 
Date: March 14, 2025
 
 
 
 
 
NEKTAR THERAPEUTICS
 
By: /s/ SANDRA GARDINER
 
 
Sandra Gardiner
 
 
Interim Chief Financial Officer (Principal Financial and Accounting 
Officer)
 
POWER OF ATTORNEY
KNOW ALL PERSON BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints Howard W. Robin and 
Sandra Gardiner and each of them, as his or her true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for him or 
her and in his or her name, place and stead, in any and all capacities, to sign any and all amendments to this Annual Report on Form 10-K 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 or she might or could do in person, hereby ratify and confirming all that said attorneys-in-
fact and agents, or any of them, or their or his or her substitute or substitutes, may lawfully do or cause to be done by virtue hereof.
Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, this report has been signed by the following persons in the 
capacities and on the dates indicated:
 
Signature
 
Title
 
Date
 
 
   
 
 
 
/s/ HOWARD W. ROBIN
  Chief Executive Officer, President and Director
 
March 14, 2025
 
Howard W. Robin
  (Principal Executive Officer)
 
 
 
 
   
 
 
 
/s/ SANDRA GARDINER
  Interim Chief Financial Officer
 
March 14, 2025
 
Sandra Gardiner
  (Principal Financial and Accounting Officer)
 
 
 
 
   
 
 
 
/s/ ROBERT B. CHESS
  Director, Chairman of the Board of Directors
 
March 14, 2025
 
Robert B. Chess
   
 
 
 
 
   
 
 
 
/s/ JEFFREY R. AJER
  Director
 
March 14, 2025
 
Jeffrey R. Ajer
   
 
 
 
 
   
 
 
 
/s/ DIANA M. BRAINARD
  Director
 
March 14, 2025
 
Diana M. Brainard
   
 
 
 
 
   
 
 
 
/s/ R. SCOTT GREER
  Director
 
March 14, 2025
 
R. Scott Greer
   
 
 
 
 
   
 
 
 
/s/ ROY A. WHITFIELD
  Director
 
March 14, 2025
 
Roy A. Whitfield
   
 
 
 
 
 

- 1 -
Updated: June 8, 2023
Exhibit 19.1
NEKTAR THERAPEUTICS
SECURITY TRADING POLICY
Nektar Therapeutics (“Nektar” or the “Company”) is committed to complying with all applicable laws and regulations.
Nektar has adopted this Security Trading Policy (“Policy”) to prohibit Affiliates from trading in the securities of any company, 
including Nektar, while in possession of material, non-public information about such company, as well as passing on material, 
non-public information to others who trade on that information. These types of transactions are commonly known as “insider 
trading” and “tipping,” respectively. 
Our Board of Directors has approved this Policy, and we have appointed our head of the legal department (“General 
Counsel”) (with their designees) to administer the Policy and to be available to answer your questions.
1.
Scope of the Policy. Because our stock is publicly traded, as an employee, officer, director, consultant or contractor, you 
and your Affiliates (as defined below) must comply with both the provisions of federal and state securities laws and with 
our policies, including this policy and our Corporate Disclosure Policy. It is the policy of Nektar to maintain proper 
procedures to ensure compliance with applicable securities laws and other ethical standards. During the course of your 
employment with or delivery of services to Nektar, you will learn information about the Company that may be material 
and/or not publicly known. It is illegal for you to buy or sell Nektar’s stock (or other securities, whether they are 
Nektar securities or the securities of other companies) on the basis of material, non-public information. It is also 
illegal for you to pass such information on to others who use it to decide whether to buy or sell securities. Our 
Policy prohibits not only illegal activities, but also other stock trading activities that may not be illegal. These additional 
restrictions are designed to protect both you and Nektar from even the appearance of improper activity. 
This Policy provides you with an overview of the most significant aspects of trading in Nektar’s securities (including 
insider trading). All individuals subject to this policy are obligated to read, abide by and retain this Policy and applicable 
laws.
Persons Covered by the Policy. This Policy applies to all Nektar directors, officers, employees (regardless of whether 
full-time, part-time or temporary), consultants, and contractors of Nektar, and the following persons (collectively, these 
persons and entities are referred to as “Affiliates”):
•
your family members (“Family Members”), defined as: (a) your spouse, domestic partner, children, 
stepchildren, grandchildren, parents, stepparents, grandparents, siblings, in-laws, significant other or other 
family members, in each case, living in the same household; (b) your children or your spouse’s children who do 
not reside in the same household as you but are financially dependent on you; and (c) any of 

- 2 -
Updated: June 8, 2023
person within (a) or (b) who does not reside in your household but whose transactions are directed by you;
•
any individual over whose account you have control and to whose financial support you materially contribute 
(wherein materially contributing to financial support would include, for example, paying an individual’s rent but 
not just a phone bill);
•
all trusts, family partnerships and other types of entities formed for the benefit of a Restricted Person (as defined 
herein) or for the benefit of a member of your family over which you have the ability to influence or direct 
investment decisions concerning securities; 
•
all persons who execute trades on your behalf; and
•
all investment funds, trusts, retirement plans, partnerships, corporations and other types of entities over which 
you have the ability to influence or direct investment decisions concerning securities (other than electronically 
traded and investment funds that hold Nektar stock as part of an index and which you have de minimis control); 
provided, however, that the black-out periods and pre-clearance procedures do not apply to any such entity that 
engages in the investment of securities in the ordinary course of its business (e.g., an investment fund or 
partnership) if the entity has established its own insider trading controls and procedures in compliance with 
applicable securities laws and it (or an affiliated entity) has represented to the Company that its affiliated 
entities:  (a) engage in the investment of securities in the ordinary course of their respective businesses; (b) have 
established insider trading controls and procedures in compliance with securities laws; and (c) are aware that the 
securities laws prohibit any person or entity who has material nonpublic information concerning the Company 
from purchasing or selling securities of the Company or from communicating such information to any other
person under circumstances in which it is reasonably foreseeable that such person is likely to purchase or sell 
securities.
You are responsible for ensuring compliance with this Policy by all of your Affiliates.
Duration of Trading Prohibitions. These trading prohibitions continue whenever and for as long as you know or are in 
possession of material nonpublic information. Remember, anyone scrutinizing your transactions will be doing so after 
the fact, with the benefit of hindsight. As a practical matter, before engaging in any transaction, you should carefully 
consider even the appearance of improper insider trading and how enforcement authorities and others might view the 
transaction in hindsight. 
In the event that you leave the Company for any reason, this Security Trading Policy will continue to apply to you and 
your Affiliates until the later of: (1) the first full trading day following the day in which there is a public release of 
earnings for the fiscal quarter in which you leave the Company; and (2) the first full trading day following the day in 
which any material non-public information known to you has become public or is no longer material.
2.
Definition of “Material, Non-Public Information.” Information is “material” if its disclosure could reasonably have 
an effect on the price of Nektar’s stock, if a reasonable person would consider it important in deciding whether to buy or 
sell Nektar stock, or if 

- 3 -
Updated: June 8, 2023
the disclosure of the information could reasonably be expected to significantly alter the total mix of information in the 
market about the Company. Both positive and negative information may be material. While it is not possible to identify 
all information that would be deemed “material,” common examples of “material” information include: 
•
news concerning the clinical progress of a product; 
•
significant data or results of a clinical trial; 
•
safety issues that arise in clinical trials; 
•
communications with FDA or other regulators; 
•
manufacturing activity indicating level of partner sales; 
•
positive or negative news concerning a relationship with one of Nektar’s corporate partners; 
•
information concerning new products;
•
earnings, revenue, investment or expense information, financial projections, or financial results including 
changes to previously announced financial results; 
•
information concerning pending or proposed mergers, acquisitions, alliances,  other business combinations or 
collaborations, divestitures, bankruptcies or receiverships; 
•
patent developments; 
•
significant developments in proposed or pending litigation or government and regulatory investigations; 
•
cybersecurity risks and incidents, including the discovery of significant vulnerabilities or breaches; or 
•
key personnel hires or departures.
It can sometimes be difficult to know whether information would be considered “material.” The determination of 
whether information is material or not is almost always made after the fact, when the effect of that information on the 
market can be quantified. Although you may be aware of information that you do not consider to be material, federal 
regulators and others may conclude that such information was material. Therefore, trading in a company’s securities 
based on such information can be risky. When doubt exists, you should presume that the information is material.
Information is “non-public” if it has not been announced publicly, such as by press release, conference call, public 
filing, conference presentation, or similar means of public dissemination, or, if it has been announced publicly, where the 
public has not had a reasonable opportunity to absorb the information. You must wait until the opening of the first full 
trading day following the day that information is publicly announced before you can trade. For example, if the 
information is publicly announced on Tuesday before the market opens, you cannot trade until the opening of the market 
on Wednesday (assuming no intervening holidays on which markets are closed between Tuesday and Wednesday).
If you are unsure whether information is material or non-public, you should consult with Nektar’s General 
Counsel.

- 4 -
Updated: June 8, 2023
3.
Restrictions Applicable to All Affiliates. 
a.
No Trading While in Possession of Material, Non-Public Information. You may not trade in Nektar’s 
securities (whether for your account or for the account of another) while you possess information about Nektar 
that is both material and non-public, except for trades made pursuant to plans approved by the General Counsel 
in accordance with the Company’s Rule 10b5-1 Trading Plan Policy that is intended to comply with Rule 10b5-
1 under the Securities and Exchange Act of 1934 (the “Exchange Act”).
Nektar’s securities include common stock, options to purchase common stock, any other type of securities that 
the Company may issue (such as preferred stock, convertible debentures, warrants and exchange-traded 
options), and any derivative securities that provide the economic equivalent of ownership of any the Company’s 
securities or an opportunity, direct or indirect, to profit from any change in the value of the Company’s 
securities. If you possess material, non-public information relating to Nektar, you are prohibited from buying or 
selling Nektar securities until the earlier of (a) the beginning of the first full trading day following the day in 
which the information is publicly announced or (b) such time as that non-public information is no longer
material.
If you, during the course of your employment with Nektar, possess material, non-public information of another 
company (e.g., as a customer, vendor, supplier, business partner, potential business partner, or potential 
acquisition target), you are prohibited from buying or selling the securities of such company.
b.
No Tipping. You must not disclose or pass on (“tip”) material, non-public information, whether positive or 
negative, to any other person (including Affiliates, family members, friends and acquaintances) where such 
information may be used by the other person to trade in Nektar’s securities (or the securities of any other entity), 
whether or not you intend to or actually do realize a profit (or any other benefit) from such tipping. You are also 
prohibited from making recommendations, advising, “signaling,” or expressing opinions about trading, while 
aware of material, non-public information. You may, of course, discuss such information with other Nektar 
employees on a “need to know” basis and solely for the purpose of performing your job at Nektar.
It should be noted that trading by members of an officer’s, director’s or employee’s household can be the 
responsibility of such officer, director or employee, respectively, under certain circumstances and could give 
rise to legal and company-imposed sanctions.
4.
Safeguarding inside information. Before confidential information relating to Nektar or its business (including material,
non-public information) has been disclosed to the public, it must be kept in strict confidence. Utmost care must be 
exercised at all times. For example, conversations in public places, such as elevators, taxicabs or shared ride services, 
restaurants and airplanes should be limited to matters that do not involve information of a 

- 5 -
Updated: June 8, 2023
sensitive or confidential nature. In addition, do not transmit confidential information through the Internet or any 
unsecure e-mail system or other means that is not secure.
5.
Releasing public information to the market. To ensure that Nektar’s confidential information is protected to the 
maximum extent possible, no individuals other than specifically authorized personnel should release material 
information to the public or respond to inquiries from the media, investment analysts or other market participants, or 
others outside Nektar. 
If you are contacted by anyone outside the company seeking information about Nektar, and if you have not been 
expressly authorized to provide information by the Chief Executive Officer, Chief Financial Officer or Head of Investor 
Relations, you should refer the call to the Head of Investor Relations or the Chief Financial Officer. Please see Nektar’s 
Corporate Disclosure Policy.
6.
Blackout Periods. 
a.
Restricted Persons may buy or sell only when trading window period is open. Nektar has determined that 
certain individuals (“Restricted Persons”) and their Affiliates may buy or sell Nektar securities only when the 
trading window period is open. You are a “Restricted Person” if you are:
•
a Board member of Nektar;
•
an “executive officer” of Nektar as described in Rule 3b-7 under the Securities Exchange Act, and all 
individuals designated as “officers” of Nektar for purposes of Section 16 under the Exchange Act (“Section 
16 Officers”);
•
an employee of Nektar with a title of vice president or above;
•
an employee who works in the legal, finance or investor relations department of Nektar;
•
designated as a Restricted Person by the General Counsel in his or her sole discretion.
In addition to being a Restricted Person, Nektar has determined that certain individuals, (“Senior Restricted 
Persons”) must enter into a trading plan entered into in accordance with Rule 10b5-1 under the Exchange Act 
(“Trading Plan”) in order to  buy or sell Nektar securities. For more details on Trading Plans, see Paragraph 17 
and Nektar’s Rule 10b5-1 Trading Plan Policy.
You are a “Senior Restricted Person” if you are:
•
a Board member of Nektar;
•
an “executive officer” of Nektar as described in Rule 3b-7 under the Exchange Act, and all Section 16 
Officers;
•
an employee of Nektar with a title of Senior Vice president or above.

- 6 -
Updated: June 8, 2023
b.
Trading Windows. Trading window periods are those periods of time during which Restricted Persons are 
permitted to trade Nektar securities. At these times, the “window” is said to be “open.” Trading window periods 
will be emailed to Restricted Persons. The periods of time when the trading window is closed is referred to as a 
“Blackout Period.” All Restricted Persons may not buy or sell Nektar stock during any Blackout Period. 
c.
Standing Blackout Periods. There will be routine quarterly Blackout Periods which will run from the fifteenth 
(15th) day of the month in which each fiscal quarter ends until the opening of the first full trading day following 
the day on which the public release of Nektar’s earnings relating to such period is issued (a “Quarterly Blackout 
Period”). Restricted Persons and Senior Restricted Persons may not trade during any Quarterly Blackout Period
even if they do not possess any material, non-public information. This requirement does not apply to the 
exercise of Nektar employee stock options as long as payment of the exercise price is made by the employee to 
the Company in cash; however, this requirement does apply to any sale of Nektar securities to pay part or all of 
the exercise price of a stock option (i.e., a broker-assisted cashless exercise of stock options). In other words, 
Restricted Persons and Senior Restricted Persons are permitted to exercise and hold Nektar employee stock 
options even during a Blackout Period (e.g., a Quarterly Blackout Period). Restricted Persons may not sell any 
stock acquired through the exercise of an option during a Blackout Period (e.g., a Quarterly Blackout Period). 
d.
Special Blackout Periods. From time to time, Nektar may impose a “blackout” period during which trading by 
a specified group of insiders or all insiders would be considered inappropriate. Nektar’s Chief Financial Officer 
or its General Counsel will communicate the imposition or extension of such a blackout period to all affected 
parties (a “Special Blackout Period”). Individuals subject to a Special Blackout Period may not disclose the fact 
that they are subject to a Special Blackout Period to anyone, including other employees (who may themselves 
be subject to the Special Blackout Period), family members (other than those subject to this Policy), friends or 
financial advisers/stock brokers. The imposition of a Special Blackout Period shall be treated as material non-
public information.  
Conference-related Blackout Periods. Restricted Persons and Senior Restricted Persons are subject to 
Blackout Periods that will run from three (3) trading days before, and one (1) trading day after, the following 
pre-scheduled industry conferences (“Conference-Related Blackout Periods”):
•
Annual J.P. Morgan Healthcare Conference; 
•
Cowen & Co. Annual Health Care Conference; and
•
American Academy of Dermatology (AAD) Annual Meeting.

- 7 -
Updated: June 8, 2023
Restricted Persons and Senior Restricted Persons may not trade or schedule trades pursuant to a Trading Plan 
during the Conference-related Blackout Periods, even if they don’t possess any material, non-public 
information. The General Counsel may, in his or her sole discretion, modify the pre-scheduled industry 
conferences based on the relevance of these conferences to the Company’s business, and may further designate 
additional medical, analyst, or industry conferences subject to Conference-Related Blackouts.
7.
Pre-Clearance of Trades by Restricted Persons at the Vice President level:  Prior to making any trade in Nektar’s 
securities other than pursuant to a validly entered into Rule 10b5‑1 Trading Plan, any Restricted Person who is an 
employee of Nektar with a title of vice president (“VP Restricted Person”) must first obtain the written authorization of 
the General Counsel, in accordance with the procedures described below. In addition, such advance approval must be 
obtained before buying or selling securities in any company that the VP Restricted Person knows has established or is in 
the process of establishing a significant business relationship with the Company, whether as a customer, supplier, 
affiliate or otherwise. The VP Restricted Person must contact the General Counsel at least two (2) business days before 
the intended purchase or sale in order to allow the General Counsel to review the substance of the trade and determine 
whether or not the Company or the individual must comply with any reporting requirements. If the proposed transaction 
is approved, the VP Restricted Person shall confirm in writing to the General Counsel that purchase or sale was 
consummated within two (2) business days of the transaction. 
Gifts of Company securities are considered a trade in securities for purposes of this Policy. 
a.
Procedures. No VP Restricted Person may trade in our securities unless:
•
The VP Restricted Person has notified the General Counsel of the amount and nature of the proposed 
trade(s) using the Stock Transaction Request form attached to this Policy. 
•
The VP Restricted Person has certified to the General Counsel in writing before the proposed trade(s) that 
the VP Restricted Person does not possess material nonpublic information concerning the Company.
•
The General Counsel has approved the trade(s) and has certified their approval in writing (which may be by 
email). 
The General Counsel does not assume responsibility for, and approval by the General Counsel does not protect 
the VP Restricted Person from, the consequences of prohibited insider trading.
b.
Additional Information. VP Restricted Persons shall provide to the General Counsel any documentation the 
General Counsel reasonably requires in furtherance of the foregoing procedures. Any failure to provide such 
information will be grounds for the General Counsel to deny approval of the trade request.

- 8 -
Updated: June 8, 2023
c.
Notification of Brokers of Insider Status. Senior Restricted Persons who are required to file reports under 
Section 16 of the Exchange Act shall inform their broker-dealers that (a) the Senior Restricted Person is subject 
to Section 16; and (b) the broker is to provide transaction information to the Senior Restricted Person and/or 
General Counsel on the day of a trade. 
d.
No Obligation to Approve Trades. The foregoing approval procedures do not in any way obligate the General 
Counsel to approve any trade. The General Counsel has sole discretion to reject any trading request. 
From time to time, an event may occur that is material to the Company and is known by only a limited number 
of directors and employees. The General Counsel may decline a VP Restricted Person’s request to preclear a 
proposed trade based on the existence of a material nonpublic development – even if the VP Restricted Person is 
not aware of that material nonpublic development. If any VP Restricted Person engages in a trade before a 
material nonpublic development is disclosed to the public or resolved, the VP Restricted Person and the 
Company might be exposed to a charge of insider trading that could be costly and difficult to refute even if the 
VP Restricted Person was unaware of the development. So long as the event remains material and nonpublic, 
the General Counsel may decide not to approve any transactions in the Company’s securities. The General 
Counsel will subsequently notify the VP Restricted Person once the material nonpublic development is 
disclosed to the public or resolved. If a VP Restricted Person requests preclearance of a trade during the 
pendency of such an event, the General Counsel may reject the trading request without disclosing the reason.
e.
Completion of Trades. After receiving written clearance to engage in a trade signed by the General Counsel, a 
VP Restricted Person must complete the proposed trade within two (2) business days or make a new trading 
request. Even if the VP Restricted Person has received clearance, the VP Restricted Person may not engage in a 
trade if (i) such clearance has been rescinded by the General Counsel, (ii) the VP Restricted Person has 
otherwise received notice that the trading window has closed or (iii) the VP Restricted Person has or acquires 
material nonpublic information.
f.
Post-Trade Reporting. The details of any transactions in our securities (including transactions effected 
pursuant to a Rule 10b5-1 Plan) by a Senior Restricted Person (or an Affiliated Person) who is required to file 
reports under Section 16 of the Exchange Act must be reported to the General Counsel by the Senior Restricted 
Person or their brokerage firm on the same day on which a trade order is placed or such a transaction otherwise 
is entered into. The report shall include the date of the transaction, quantity of shares, the price and the name of 
the broker-dealer that effected the transaction. This reporting requirement may be satisfied by providing (or 
having the Senior Restricted Person’s broker provide) a trade order confirmation to the General Counsel if the 
General Counsel receives such information by the required date. Compliance by directors and executive officers 
with this provision is imperative given the requirement of Section 16 of the Exchange Act that these 

- 9 -
Updated: June 8, 2023
persons generally report changes in ownership of Company securities within two (2) business days. The 
sanctions for noncompliance with this reporting deadline include mandatory disclosure in the Company’s proxy 
statement for the next annual meeting of stockholders, as well as possible civil or criminal sanctions for chronic 
or egregious violators.
8.
No Trading in Derivative Securities. You are prohibited from trading in derivative securities of Nektar or any 
derivative securities that provide the economic equivalent of ownership of any of Nektar’s securities or an opportunity, 
direct or indirect, to profit from any change in the value of our securities or engage in any other hedging transaction with 
respect to our securities, at any time. Derivative securities are securities other than common stock that are speculative in 
nature because they permit a person to leverage his or her investment using a relatively small amount of money. 
Examples of derivative securities include put and call options. These are different from employee stock options, which 
are not derivative securities.
9.
No Short Selling. You are prohibited from engaging in short selling of Nektar securities. Selling short includes 
transactions in which you borrow stock from a broker, sell it, and eventually buy it back on the market to return the 
borrowed shares to the broker. Profit is anticipated through the expectation that the stock price will decrease during the 
period of borrowing.
10.
No Purchasing on Margin. You are prohibited from purchasing Nektar stock on margin at any time. Purchasing 
securities on margin is the use of borrowed money from a brokerage to purchase securities. You may, however, hold 
Nektar stock in a margin account, i.e., an account that allows you to borrow money against your stock, including Nektar 
stock so long as you have, at all times, sufficient cash or securities other than Nektar stock to meet a margin call. You 
may not allow a “margin call” to be covered by the sale of Nektar securities while in possession of material, non-public 
information or if the trading window has been closed by Nektar, and, in the case of Restricted Persons, during a Blackout 
Period whether or not such persons are in possession of material, non-public information.
11.
No Pledges. You may not pledge Company securities as collateral for a loan (or modify an existing pledge).
12.
No Participating in Chat Rooms. You must not participate in “chat rooms” or other electronic discussion groups on the 
Internet or on social media concerning the activities of Nektar, the prospects for Nektar stock, or the prospects of other 
companies with which Nektar does business, even if you do so anonymously. Please refer to the Nektar Corporate 
Disclosure Policy.
13.
No Recommending of Stock. You may never recommend to or advise another person that he or she buy, hold or sell 
Nektar stock. This rule does not apply to those Nektar employees authorized to speak to analysts, fund managers, etc.

- 10 -
Updated: June 8, 2023
14.
No Trading in the Securities of Other Companies. Many of the trading restrictions described throughout this Policy 
also apply to transactions in the stock of other companies, to the extent you have learned material, non-public 
information about these companies as a result of your employment by or delivery of services to Nektar. Companies 
working with Nektar include but are not limited to corporate partners and key suppliers and contractors.
15.
Gifts and Other Distributions in Kind. No Restricted Person may donate or make any other transfer of Company 
securities without consideration when the Restricted Person is not permitted to trade unless the donee agrees in writing 
not to sell the shares until the Restricted Person is permitted to sell. In addition to charitable donations or gifts to family 
members, friends, trusts or others, this prohibition applies to distributions to limited partners by limited partnerships that 
are subject to this Policy.
16.
Penalties for Insider Trading. Trading while aware of inside information is a crime and is pursued aggressively by the 
federal government. Penalties for insider trading include criminal fines of up to $5,000,000 and 20 years in jail for 
individuals. In addition, the Securities and Exchange Commission may seek the imposition of a civil penalty of up to 
three times the profits made or losses avoided from trading while aware of inside information. Those who trade on inside 
information also must return any profits made, with interest, and they are subject to an injunction against future 
violations. Finally, under some circumstances, people who trade on inside information may be subjected to civil liability 
in private lawsuits.
Employers are at risk under federal law. Employers may, among other things, face civil penalties equal to the 
greater of $2,000,000 or more,  up to  three times the profits made or losses avoided by the trader if they 
recklessly fail to take preventive steps to control insider trading, as well as criminal penalties of up to $25,000,000, 
and could under some circumstances be subject to private lawsuits and civil liability.
In addition, violation of this Policy or any federal or state insider trading laws may result in severe personnel action, up 
to and including termination of your employment or other relationship with Nektar. Any violation of this Policy should 
be reported to the General Counsel.
The Company reserves the right to determine, in its own discretion and on the basis of the information available to it, 
whether this Policy has been violated. The Company may determine that specific conduct violates this Policy whether or 
not it also violates the law. It is not necessary for the Company to await the filing or conclusion of a civil or criminal 
action against an alleged violator before taking disciplinary action.
17.
Rule 10b5-1 Plans. The Securities and Exchange Commission provides for an affirmative defense from insider trading 
liability for trades executed pursuant to a plan, arrangement, or instruction that meets the requirements of Rule 10b5-1 
under the Exchange Act (“Trading Plan”). Generally, Trading Plans must be documented in writing and established at a 
time that the person was not aware of material, non-public information and must provide specific (as detailed by the 
rule) instructions as to amount, price, and timing of the trades thereunder. The Company has adopted a separate Rule 
10b5-1 Trading Policy (the 

- 11 -
Updated: June 8, 2023
“Rule 10b5-1 Trading Policy”) that sets forth the requirements for putting in place a Rule 10b5-1 Plan with respect to 
Company securities. 
18.
Exercise of Stock Options. The trading prohibitions and restrictions set forth in the Policy  do not apply to the exercise 
for cash of an option to purchase securities of the Company. However, the exercise is subject to the current reporting 
requirements of Section 16 of the Exchange Act and, therefore, Senior Restricted Persons must comply with the post-
trade reporting requirement described above for any such transaction. In addition, the securities acquired upon the 
exercise of an option to purchase Company securities are subject to all of the requirements of this Policy. Moreover, the 
Policy applies to the use of outstanding Company securities to pay part or all of the exercise price of an option, any net 
option exercise, any exercise of a stock appreciation right, share withholding and any sale of stock as part of a broker-
assisted cashless exercise of an option or any other market sale for the purpose of generating the cash needed to pay the 
exercise price of an option.
19.
Employee Stock Purchase Plan. The trading prohibitions and restrictions set forth in this Policy do not apply to 
periodic wage withholding contributions by the Company or employees of the Company which are used to purchase the 
Company’s securities pursuant to the employees’ advance instructions under the Company’s Amended and Restated 
Employee Stock Purchase Plan, as amended from time to time. However, no person subject to this Policy may: (a) elect 
to participate in the plan or alter his or her instructions regarding the level of withholding or purchase by the employee of 
Company securities under such plan; or (b) make cash contributions to such plan (other than through periodic wage 
withholding) without complying with the Policy. Any sale of securities acquired under such plan is subject to the 
prohibitions and restrictions of this Policy.
20.
Tax Withholding. The trading prohibitions and restrictions set forth in this Policy do not apply to the withholding by 
the Company of shares of stock upon vesting of restricted stock or upon settlement of restricted stock units to satisfy 
applicable tax withholding requirements if (a) such withholding is required by the applicable plan or award agreement or 
(b) the election to exercise such tax withholding right was made by the Restricted Person in compliance with this Policy.
21.
Assistance, Enforcement of the Policy and Reporting of Violations. If you have any questions about any aspect of 
this policy, you are encouraged to contact the General Counsel. You should not try to make your own judgments about 
what constitutes illegal conduct. If you have any questions about this Policy, your responsibilities or the responsibilities 
of others under this Policy or specific transactions, please contact the General Counsel. In any event, err on the side of 
caution.

- 12 -
Updated: June 8, 2023
If you violate this Policy or any federal or state laws governing insider trading or know of any such violation by any 
director or employee of the Company, you should report the violation immediately to the General Counsel. In addition, if 
you know or have reason to believe that this policy has been or is about to be violated, you should report this information 
to your manager, the General Counsel or, if you prefer to make an anonymous report, you may report to Nektar’s help 
line at www.nektar.ethicspoint.com.
22.
Waivers. A waiver of any provision of this Policy may be authorized in writing by the General Counsel. All waivers 
shall be reported to the Board of Directors. 
 
 
ADOPTED:
June 8, 2023
EFFECTIVE:
June 8, 2023
 

 
 
APPENDIX A
POLICY CONCERNING TRADING IN COMPANY SECURITIES
CERTIFICATION
You must sign, date and return this Certification stating that you received the Nektar Therapeutics Security Trading 
Policy (the “Policy”) and related procedures, and you agree to comply with it. Please note that you are bound by the Policy 
whether or not you sign the Certification. You will be required to confirm your compliance with the Policy by signing and 
returning a copy of the Certification each year.
You will receive training regarding the Policy on a periodic basis. At that time, it is expected that you will ask questions 
sufficient to allow you to understand the Policy. Also, if at any time during the year you desire additional training or have a 
question regarding the Policy, please contact the Legal Department to set up an appointment for training.
I hereby certify that I:
a.
have read and understand Nektar’s Security Trading Policy, a copy of which was distributed with this 
certificate;
b.
have complied with the foregoing policy and procedures;
c.
will continue to comply with the policy and procedures set forth in the Policy; and
d.
if required, will request prior approval of all proposed sales or acquisitions of securities of Nektar.
 
Signature:
 
 
 
 
 
Name:
 
 
(please print)
 
 
 
 
Department or Title:
 
 
 
 
 
Date:
 
 

 
 
APPENDIX B
STOCK TRANSACTION REQUEST
Pursuant to Nektar’s Security Trading Policy, I hereby notify Nektar (the “Company”) of my intent to trade the securities of the Company as
indicated below: 
REQUESTER INFORMATION
   
 
 
Insider’s Name:
 
 
   
 
 
 
 
 
   
 
 
INTENT TO PURCHASE
   
 
 
Number of shares:
 
 
   
 
 
Intended trade date:
 
 
   
 
 
Means of acquiring shares:

Acquisition through employee benefit plan (please specify): 
 
 
 
 
 
 
 
 
 
 
   
 
 
 

Purchase through a broker on the open market
 
 
 
 
   
 
 
 

Other (please specify): 
 
 
 
 
 
 
 
 
 
INTENT TO SELL
 
   
 
 
 
 
 
   
 
 
Number of shares:
 
   
 
 
Intended trade date:
 
   
 
 
Means of selling shares:

Sale through employee benefit plan (please specify): 
 
 
 
 
 
 
 
 
 
 
   
 
 
 

Sale through a broker on the open market
 
 
 
 
   
 
 
 

Other (please specify): 
 
 
 
 
 
 
 
 
 
SECTION 16
  RULE 144 (Not applicable if transaction requested involves a 
purchase)
 
 
☐
 
I am not subject to Section 16.
 
 
I am not an “affiliate” of the Company and the transaction 
requested above does not involve the sale of “restricted 
securities” (as those terms are defined in Rule 144 under the 
Securities Act of 1933, as amended).
 
 
 
 
☐To the best of my knowledge, I have not (and am not deemed to have) 
engaged in an opposite way transaction within the previous 6 months 
that was not exempt from Section 16(b) of the Exchange Act.
 
 
 
 
 
 
To the best of my knowledge, the transaction requested 
above will meet all of the applicable conditions of Rule 144.
 
 
 
   
 
 
 
 
   
 
 
 
☐None of the above.
 
The transaction requested will be made pursuant to an 
effective registration statement covering such transaction.
 
 
 
 
 
 
None of the above.
 
 
 
   
 
 
 
   
 
 
 

 
 
CERTIFICATION
I hereby certify that I am not (1) in possession of any material nonpublic information concerning the Company, as defined in the Company’s Security 
Trading Policy and (2) purchasing any securities of the Company on margin in contravention of the Company’s Security Trading Policy. I understand 
that, if I trade while possessing such information or in violation of such trading restrictions, I may be subject to severe civil and/or criminal penalties and 
may be subject to discipline by the Company including termination of my employment.
 
 
 
Insider’s Signature
 
Date
 
APPROVAL
 
 
 
Signature of General Counsel (or designee)
 
Date
 
 
*NOTE: Multiple lots must be listed on separate forms or broken out.
 

Exhibit 21.1
Subsidiaries of Nektar Therapeutics
None.

 
 
Exhibit 23.1 
 
Consent of Independent Registered Public Accounting Firm 
 
We consent to the incorporation by reference in the following Registration Statements:
 
(1) Registration Statement (Form S-8 No. 333-145259) pertaining to the 401(k) Retirement Plan of Nektar Therapeutics,
(2) Registration Statement (Form S-8 No. 333-170371) pertaining to the Employee Stock Purchase Plan of Nektar Therapeutics,
(3) Registration Statement (Form S-8 No. 333-183193) pertaining to the 2012 Performance Incentive Plan of Nektar Therapeutics,
(4) Registration Statement (Form S-8 No. 333-197781) pertaining to the Employee Stock Purchase Plan of Nektar Therapeutics,
(5) Registration Statement (Form S-8 No. 333-206136) pertaining to the 2012 Performance Incentive Plan of Nektar Therapeutics,
(6) Registration Statement (Form S-8 No. 333-218777) pertaining to the 2017 Performance Incentive Plan of Nektar Therapeutics,
(7) Registration Statement (Form S-8 No. 333-226004) pertaining to the Amended and Restated 2017 Performance Incentive Plan of Nektar Therapeutics, 
(8) Registration Statement (Form S-8 No. 333-242327) pertaining to the Amended and Restated 2017 Performance Incentive Plan and Amended and Restated 
Employee Stock Purchase Plan of Nektar Therapeutics, 
(9) Registration Statement (Form S-8 No. 333-258900) pertaining to the Amended and Restated 2017 Performance Incentive Plan of Nektar Therapeutics,
(10) Registration Statement (Form S-8 No. 333-266580) pertaining to the Amended and Restated 2017 Performance Incentive Plan of Nektar Therapeutics, 
(11) Registration Statement (Form S-8 No. 333-273962) pertaining to the Amended and Restated 2017 Performance Incentive Plan of Nektar Therapeutics; and 
(12) Registration Statement (Form S-3 No. 333-279760) of Nektar Therapeutics;
 
of our report dated March 14, 2025, with respect to the consolidated financial statements of Nektar Therapeutics included in this Annual Report (Form 10-K) of Nektar 
Therapeutics for the year ended December 31, 2024.
 
 
/s/ Ernst & Young LLP
 
San Mateo, California
March 14, 2025 
 

 
 
Exhibit 31.1
 
CERTIFICATIONS
I, Howard W. Robin, certify that:
1.
I have reviewed this Annual Report on Form 10-K of Nektar Therapeutics for the year ended December 31, 2024;
2.
Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements 
made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;
3.
Based on my knowledge, the financial statements and other financial information included in this report, fairly present in all material respects the financial 
condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;
4.
The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange 
Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant 
and have:
a)
Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under my supervision, to 
ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, 
particularly during the period in which this report is being prepared;
b)
Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, 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;
c)
Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness 
of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and
d)
Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal 
quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the 
registrant’s internal control over financial reporting;
5.
The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the 
registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):
a)
All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to 
adversely affect the registrant’s ability to record, process, summarize and report financial information; and
b)
Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over 
financial reporting.
Date: March 14, 2025
 
/s/ HOWARD W. ROBIN
 
Howard W. Robin
 
Chief Executive Officer, President and Director

 
 
Exhibit 31.2
 
CERTIFICATIONS
I, Sandra Gardiner, certify that:
1.
I have reviewed this Annual Report on Form 10-K of Nektar Therapeutics for the year ended December 31, 2024;
2.
Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements 
made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;
3.
Based on my knowledge, the financial statements and other financial information included in this report, fairly present in all material respects the financial 
condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;
4.
The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange 
Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant 
and have:
a)
Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under my supervision, to 
ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, 
particularly during the period in which this report is being prepared;
b)
Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, 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;
c)
Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness 
of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and
d)
Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal 
quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the 
registrant’s internal control over financial reporting;
5.
The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the 
registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):
a)
All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to 
adversely affect the registrant’s ability to record, process, summarize and report financial information; and
b)
Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over 
financial reporting.
Date: March 14, 2025
 
/s/ Sandra Gardiner
 
Sandra Gardiner 
 
Interim Chief Financial Officer

 
 
Exhibit 32.1
SECTION 1350 CERTIFICATIONS*
Pursuant to the requirement set forth in Rule 13a-14(b) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and Section 1350 of 
Chapter 63 of Title 18 of the United States Code (18 U.S.C. § 1350), Howard W. Robin, Chief Executive Officer, President and Director of Nektar Therapeutics (the 
“Company”), and Sandra Gardiner, Interim Chief Financial Officer of the Company, each hereby certifies that, to the best of his or her knowledge:
1.
The Company’s Annual Report on Form 10-K, for the year ended December 31, 2024, to which this Certification is attached as Exhibit 32.1 (the 
“Annual Report”), fully complies with the requirements of Section 13(a) or 15(d) of the Exchange Act; and
2.
The information contained in the Annual Report fairly presents, in all material respects, the financial condition and results of operations of the 
Company for the period covered by the Annual Report.
Dated: March 14, 2025
 
/s/ HOWARD W. ROBIN
/s/ Sandra Gardiner
Howard W. Robin
 
Sandra Gardiner
Chief Executive Officer, President and Director
Interim Chief Financial Officer 
 
 
 
 
*
This certification accompanies the Annual Report on Form 10-K, to which it relates, is not deemed filed with the Securities and Exchange Commission and is not to be incorporated 
by reference into any filing of the Company under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended (whether made before or after the 
date of the Form 10-K), irrespective of any general incorporation language contained in such filing.

Exhibit 97
 
NEKTAR THERAPEUTICS
COMPENSATION RECOVERY POLICY
Adopted as of June 8, 2023
Nektar Therapeutics, a Delaware corporation (the “Company”), has adopted a Compensation Recovery Policy (this “Policy”) as 
described below.  
1.	
Overview
The Policy sets forth the circumstances and procedures under which the Company shall recover Erroneously Awarded 
Compensation from Covered Persons (as defined below) in accordance with rules issued by the United States Securities and 
Exchange Commission (the “SEC”) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”) and the 
Nasdaq Stock Market.    Please refer to Section 3 below for definitions of capitalized terms used and not otherwise defined 
herein. 
2.	
Compensation Recovery Requirement
In the event the Company is required to prepare a Material Financial Restatement, the Company shall reasonably promptly 
recover all Erroneously Awarded Compensation with respect to such Material Financial Restatement, and each Covered Person 
shall be required to take all actions necessary to enable such recovery. 
3.	
Definitions
a.
“Applicable Recovery Period” means with respect to a Material Financial Restatement, the three completed fiscal 
years immediately preceding the Restatement Date for such Material Financial Restatement. In addition, in the event 
the Company has changed its fiscal year: (i) any transition period of less than nine months occurring within or 
immediately following such three completed fiscal years shall also be part of such Applicable Recovery Period and 
(ii) any transition period of nine to 12 months will be deemed to be a completed fiscal year.
b.
“Applicable Rules” means any rules or regulations adopted by the Exchange pursuant to Rule 10D-1 under the 
Exchange Act and any applicable rules or regulations adopted by the SEC pursuant to Section 10D of the Exchange 
Act.
c.
“Board” means the Board of Directors of the Company.
d.
“Committee” means the Organization and Compensation Committee of the Board or, in the absence of such 
committee, a majority of independent directors serving on the Board.
e.
A “Covered Person means any Executive Officer. A person’s status as a Covered Person with respect to Erroneously 
Awarded Compensation shall be determined as of the time of receipt of such Erroneously Awarded Compensation 
regardless of their 

 
2
 
current role or status with the Company (e.g., if a person began service as an Executive Officer after the beginning 
of an Applicable Recovery Period, that person would not be considered a Covered Person with respect to 
Erroneously Awarded Compensation received before the person began service as an Executive Officer, but would be 
considered a Covered Person with respect to Erroneously Awarded Compensation received after the person began 
service as an Executive Officer where such person served as an Executive Officer at any time during the 
performance period for such Erroneously Awarded Compensation).
f.
“Effective Date” means June 8, 2023. 
g.
“Erroneously Awarded Compensation” means, with respect to a Material Financial Restatement, the amount of any 
Incentive-Based Compensation received by a Covered Person on or after the Effective Date during the Applicable 
Recovery Period that exceeds the amount that otherwise would have been received by the Covered Person had such 
compensation been determined based on the restated amounts in the Material Financial Restatement, computed 
without regard to any taxes paid. Calculation of Erroneously Awarded Compensation with respect to Incentive-
Based Compensation based on stock price or total shareholder return, where the amount of Erroneously Awarded 
Compensation is not subject to mathematical recalculation directly from the information in a Material Financial 
Restatement, shall be based on a reasonable estimate of the effect of the Material Financial Restatement on the stock 
price or total shareholder return upon which the Incentive-Based Compensation was received, and the Company 
shall maintain documentation of the determination of such reasonable estimate and provide such documentation to 
the Exchange in accordance with the Applicable Rules.  Incentive-Based Compensation received by a Covered 
Person prior to the Effective Date shall be subject to the Company’s Policy Regarding the Recoupment of Certain 
Performance-Based Compensation Payments, effective as of February 8, 2012.
h.
“Exchange” means the Nasdaq Stock Market LLC.
i.
An “Executive Officer” means any person who served the Company in any of the following roles,  received 
Incentive-Based Compensation after beginning service in any such role (regardless of whether such Incentive-Based 
Compensation was received during or after such person’s service in such role) and served in such role at any time 
during the performance period for such Incentive-Based Compensation: the president, the principal financial officer, 
the principal accounting officer (or if there is no such accounting officer the controller), any vice president in charge 
of a principal business unit, division or function (such as sales, administration or finance), any other officer who 
performs a policy making function, or any other person who performs similar policy making functions for the 
Company. Executive officers of parents or subsidiaries of the Company may be deemed executive officers of the 
Company if they perform such policy making functions for the Company.

 
3
 
j.
“Financial Reporting Measures” mean measures that are determined and presented in accordance with the 
accounting principles used in preparing the Company’s financial statements, any measures that are derived wholly 
or in part from such measures (including, for example, a non-GAAP financial measure), and stock price and total 
shareholder return.  
k.
“Incentive-Based Compensation” means any compensation provided, directly or indirectly, by the Company or any 
of its subsidiaries that is granted, earned, or vested based, in whole or in part, upon the attainment of a Financial 
Reporting Measure.  Incentive-Based Compensation is deemed received, earned or vested when the Financial 
Reporting Measure is attained, not when the actual payment, grant or vesting occurs.
l.
A “Material Financial Restatement” means an accounting restatement of previously issued financial statements of 
the Company due to the material noncompliance of the Company with any financial reporting requirement under the 
securities laws, including any required accounting restatement to correct an error in previously-issued financial 
statements that is material to the previously-issued financial statements or that would result in a material 
misstatement if the error were corrected in the current period or left uncorrected in the current period. 
m. “Restatement Date” means, with respect to a Material Financial Restatement, the earlier to occur of: (i) the date the 
Board or the Audit Committee of the Board concludes, or reasonably should have concluded, that the Company is 
required to prepare the Material Financial Restatement or (ii) the date a court, regulator or other legally authorized 
body directs the Company to prepare the Material Financial Restatement.
4.	
Exception to Compensation Recovery Requirement
The Company may elect not to recover Erroneously Awarded Compensation pursuant to this Policy if the Committee determines 
that recovery would be impracticable, and one or more of the following conditions, together with any further requirements set 
forth in the Applicable Rules, are met: (i) the direct expense paid to a third party to assist in enforcing this Policy would exceed 
the amount to be recovered, and the Company has made a reasonable attempt to recover such Erroneously Awarded 
Compensation; or (ii) recovery would likely cause an otherwise tax-qualified retirement plan to fail to be so qualified under 
applicable regulations.  
5.	
Tax Considerations
To the extent that, pursuant to this Policy, the Company is entitled to recover any Erroneously Awarded Compensation that is 
received by a Covered Person, the gross amount received (i.e., the amount the Covered Person received, or was entitled to 
receive, before any deductions for tax withholding or other payments) shall be returned by the Covered Person. 
6.	
Method of Compensation Recovery

 
4
 
The Committee shall determine, in its sole discretion, the method for recovering Erroneously Awarded Compensation hereunder, 
which may include, without limitation, any one or more of the following:
a.
requiring reimbursement of cash Incentive-Based Compensation previously paid;
b.
seeking recovery of any gain realized on the vesting, exercise, settlement, sale, transfer or other disposition of 
any equity-based awards; 
c.
cancelling or rescinding some or all outstanding vested or unvested equity-based awards; 
d.
adjusting or withholding from unpaid compensation or other set-off;
e.
cancelling or setting-off against planned future grants of equity-based awards; and/or 
f.
any other method permitted by applicable law or contract.
Notwithstanding the foregoing, a Covered Person will be deemed to have satisfied such person’s obligation to return Erroneously 
Awarded Compensation to the Company if such Erroneously Awarded Compensation is returned in the exact same form in which 
it was received; provided that equity withheld to satisfy tax obligations will be deemed to have been received in cash in an 
amount equal to the tax withholding payment made.
7. 	 Policy Interpretation
This Policy shall be interpreted in a manner that is consistent with the Applicable Rules and any other applicable law and shall 
otherwise be interpreted (including in the determination of amounts recoverable) in the business judgment of the Committee. The 
Committee shall take into consideration any applicable interpretations and guidance of the SEC in interpreting this Policy, 
including, for example, in determining whether a financial restatement qualifies as a Material Financial Restatement hereunder. 
To the extent the Applicable Rules require recovery of Incentive-Based Compensation in additional circumstances besides those 
specified above, nothing in this Policy shall be deemed to limit or restrict the right or obligation of the Company to recover 
Incentive-Based Compensation to the fullest extent required by the Applicable Rules. This Policy shall be deemed to be 
automatically amended, as of the date the Applicable Rules become effective with respect to the Company, to the extent required 
for this Policy to comply with the Applicable Rules.
8.	
Policy Administration
This Policy shall be administered by the Committee. The Committee shall have such powers and authorities related to the 
administration of this Policy as are consistent with the governing documents of the Company and applicable law. The Committee 
shall have full power and authority to take, or direct the taking of, all actions and to make all determinations required or provided 
for under this Policy and shall have full power and authority to take, or direct the taking 

 
5
 
of, all such other actions and make all such other determinations not inconsistent with the specific terms and provisions of this 
Policy that the Committee deems to be necessary or appropriate to the administration of this Policy.  The interpretation and 
construction by the Committee of any provision of this Policy and all determinations made by the Committee under this policy 
shall be final, binding and conclusive.  
9.	
Compensation Recovery Repayments not Subject to Indemnification
Notwithstanding anything to the contrary set forth in any agreement with, or the organizational documents of, the Company or 
any of its subsidiaries, Covered Persons are not entitled to indemnification for Erroneously Awarded Compensation recovered 
under this Policy and, to the extent any such agreement or organizational document purports to provide otherwise, Covered 
Persons hereby irrevocably agree to forego such indemnification.

 
 
Exhibit 99 
Unaudited Pro Forma Condensed Consolidated Financial Statements
 
On December, 2, 2024, Nektar Therapeutics (Nektar, we) completed the sale (the Transaction) of our manufacturing facility located in Huntsville, 
Alabama (the Facility) and certain other manufacturing assets related thereto, including the assignment of our existing manufacturing and supply 
obligations, to Gannet BioChem, an affiliate of Ampersand Management LLC d/b/a Ampersand Capital Partners (Ampersand), via an Asset Purchase 
Agreement (the APA), for consideration of $64.7 million in cash, net of transaction costs, and an approximate 20% equity ownership at the time of close 
in Gannet BioChem, which is accounted for under the equity method of accounting. Concurrently with the closing of the Transaction, we entered into 
certain ancillary agreements with Gannet BioChem, including supply agreements for rezpegaldesleukin and NKTR-255, and certain services 
agreements. See Note 12 to our Consolidated Financial Statements filed in the accompanying annual report on Form 10-K for the year ended December 
31, 2024 (the 2024 Consolidated Financial Statements) for additional information.
 
The unaudited pro forma condensed consolidated financial statements have been derived from our historical 2024 Consolidated Financial 
Statements, and give effect to the Transaction. The unaudited pro forma condensed consolidated statement of operations reflects Nektar’s results as if 
the sale of the Facility had occurred as of January 1, 2024. A pro forma balance sheet is not presented as the Transaction was fully reflected in our 
balance sheet as of December 31, 2024.
 
The unaudited pro forma condensed consolidated statement of operations is not intended to be a complete presentation of Nektar’s results of 
operations had the sale of the Facility occurred for the period indicated. In addition, the unaudited pro forma condensed consolidated statement of 
operations is provided for illustrative and informational purposes only and are not necessarily indicative of our future results of operations or financial 
condition had the Transaction been completed on the date assumed. The unaudited pro forma condensed consolidated statement of operations should be 
read together with our historical consolidated financial statements and accompanying notes, including the 2024 Consolidated Financial Statements.
 
The “As Reported” column in the unaudited pro forma condensed consolidated statement of operations reflects our historical condensed 
consolidated statement of operations for the year ended December 31, 2024, which includes the recognition of a one-time non-recurring gain 
of $40.4 million as a result of the Transaction.
 
The “Pro Forma Adjustments” column in the unaudited pro forma condensed consolidated statement of operations reflects the elimination of the 
activity of the Facility before the sale on December 2, 2024, the effects of the supply agreement and services agreements referenced above, and the 
accounting for the equity method investment as if the Transaction occurred on January 1, 2024. In accounting for Gannet BioChem’s results as an equity 
method investment, we used the hypothetical liquidation at book value method due to Ampersand’s liquidation preferences. Refer to Note (d) below for 
additional information. As a result of the our valuation allowance on our deferred tax assets, we estimated no pro forma tax adjustments reflected on the 
related income statement activity.
 
The unaudited pro forma condensed consolidated financial statements have been prepared in accordance with Article 11 of the Securities and 
Exchange Commission’s Regulation S-X. The unaudited pro forma condensed consolidated financial statements do not include adjustments to reflect 
any potential synergies that may be achievable, or dis-synergy costs that may occur, in connection with the sale of the Facility.
 
 
 

 
 
NEKTAR THERAPEUTICS
UNAUDITED PRO FORMA CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS
(In thousands, except per share information)
 
 
 
 
Year Ended December 31, 2024
 
 
 
As Reported
   
Pro Forma 
Adjustments
    Notes  
Pro Forma
 
Revenue:
 
     
     
   
   
Product sales
  $
33,563   $
(33,563)  (a)
 $
— 
Non-cash royalty revenue related to the sales of future royalties
   
64,267    
—    
  
64,267 
License, collaboration and other revenue
   
597    
(297)  (a)
  
300 
Total revenue
   
98,427    
(33,860)   
  
64,567 
Operating costs and expenses:
 
     
      
 
   
Cost of goods sold
   
30,686    
(30,686)  (a)
  
— 
Research and development
 
 
120,908    
(3,323)  
(b)
(c)
  
117,585 
General and administrative
   
76,751    
(705)  (b)
  
76,046 
Restructuring and impairment
   
15,670    
—    
  
15,670 
Impairment of goodwill
   
—    
—    
  
— 
Gain on sale of the Huntsville manufacturing facility
   
(40,390)   
—    
  
(40,390)
Total operating costs and expenses
   
203,625    
(34,714)   
  
168,911 
Loss from operations
   
(105,198)   
854    
  
(104,344)
Non-operating income (expense):
 
     
      
 
   
Non-cash interest expense on liabilities related to the sales of future royalties
   
(28,112)   
—    
  
(28,112)
Interest income
   
14,500    
—    
  
14,500 
Other income (expense), net
 
 
(390)   
(7,572)  
(d)
(e)
  
(7,962)
Total non-operating income (expense), net
   
(14,002)   
(7,572)   
  
(21,574)
Loss before provision for income taxes
   
(119,200)   
(6,718)   
  
(125,918)
Provision (benefit) for income taxes
   
(239)   
—    
  
(239)
Net loss
  $
(118,961)  $
(6,718)   
 $
(125,679)
 
 
     
      
 
   
Basic and diluted net loss per share
  $
(0.58)  
      
 $
(0.61)
Weighted average shares outstanding used in computing basic and diluted net loss 
per share
 
 
205,661   
     
    
205,661 
 
The accompanying notes are an integral part of the pro forma condensed consolidated statement of operations
 

 
 
Notes to Unaudited Pro Forma Condensed Consolidated Financial Statements
 
The adjustments included in the unaudited pro forma condensed consolidated statement of operations are described below:
(a)
These adjustments relate to the removal of product sales, other revenue and cost of goods sold for contracts with customers assigned to 
Gannet BioChem for the period prior to the sale of the Facility on December 2, 2024.
(b)
These adjustments relate to the removal of compensation and benefit expense for employees terminated in connection with the Transaction, 
costs of manufacturing our proprietary reagents, and depreciation and other expenses of the Facility recorded in research and development 
expense or general and administrative expense, for the period prior to the sale of the Facility on December 2, 2024.
(c)
These adjustments relate to the estimated costs that we would have incurred from Gannet BioChem under the service and supply agreements 
for such employees and reagent supply for the year ended December 31, 2024. 
 
The following table reconciles the net adjustments to research and development and general administrative expense for (b) and (c).
 
x
 
 
 
 
 
Removal of historical 
amounts recorded related 
to the Facility
 
 
Amounts due to Gannet 
BioChem under Services 
Agreements
   
Amounts due to 
Gannet BioChem 
under Supply 
Agreements
   
Total
 
Research and development
 
$
(5,800 )
  $
1,595  
  $
882  
  $
(3,323 )
General and administrative
 
 
(705 )
   
-  
   
-  
   
(705 )
Total
 
$
(6,505 )
  $
1,595  
  $
882  
  $
(4,028 )
 
(d)
These adjustments reflect estimated charges to Gannet BioChem for certain administrative services provided during the year ended 
December 31, 2024, under the transition services agreement, which we present as other income in our consolidated statement of operations.
(e)
We have recorded our share of Gannet BioChem’s losses under the hypothetical liquidation at book value (HLBV) basis for purposes of this 
condensed consolidated pro forma statement of operations. We are continuing to evaluate our accounting policy for purposes of recording 
these amounts in our consolidated financial statements, which we report on a lag basis, and therefore, we expect to report our initial share of 
Gannet BioChem’s gain and losses for the month ended December 31, 2024, in our quarterly report on Form 10-Q for the period ended 
March 31, 2025.
The HLBV method is a balance sheet approach that calculates the change in the hypothetical amount we and Ampersand would be entitled to 
receive if Gannet BioChem were liquidated at book value at the end of each period, adjusted for any contributions made and distributions 
received during the period. As discussed in Note 12 to the accompanying Consolidated Financial Statements, Ampersand is entitled to a 
cumulative preferred dividend and return of capital before any distributions are made to us. 
Under the HLBV method, our share of earnings and losses for each period are calculated based on the difference between the amount we 
would receive in liquidation at the beginning and end of each period presented, adjusted for any distributions or contributions and basis 
differences between the initial fair value of the investment in Gannet BioChem and our claim on the net assets of Gannet BioChem. Our 
initial fair value of Gannet BioChem was estimated to be approximately $12.2 million as further described in Note 12 to the 2024 
Consolidated Financial Statements. 
For purposes of this condensed consolidated pro forma statement of operations, we assumed no distributions or contributions were made 
from or to Gannet BioChem during the year ended December 31, 2024, other than the initial contributions by Ampersand and us, and we 
estimated the changes in our claims on Gannet BioChem’s net assets based on the adjustments reflected in (a) through (d) and the estimated 
effects of the Ampersand’s liquidation preference. Accordingly, the changes in Gannet BioChem’s net assets do not reflect the effects of 
basis differences relate to Gannet BioChem’s accounting for the Transaction or resulting depreciation and amortization changes, differences 
in accounting policies, differences in amounts of stock-based compensation expense between our historical plan and a plan, if any, in Gannet 
BioChem’s stock, and other costs and expenses that Gannet BioChem may incur on a standalone basis because such effects are not yet 
known or are subject to additional analysis to be completed by Gannet BioChem.
The below table reconciles the net adjustment to other income (expense), net for (d) and (e). 
 

 
 
x
 
 
 
 
 
Amounts due from Gannet 
BioChem under Services 
Agreements
 
 
Share of Gannet BioChem's 
losses
 
 
Total
 
Other income (expense), net
 
$
118  
  $
(7,690 )
  $
(7,572 )
Total
 
$
118  
  $
(7,690 )
  $
(7,572 )
 
The below table reconciles the changes in Nektar’s share of Gannet BioChem’s net assets for the year ended December 31, 2024.
 
 
 
x
 
 
 
Year Ended December 31, 
2024
 
Claim on net assets of Gannet BioChem - beginning of year
 
$
12,218  
Claim on net assets of Gannet BioChem - end of year
 
 
4,528  
Change in claim on net assets of Gannet BioChem
 
$
(7,690 )