Protagonist Therapeutics, Inc.

    PTGX ·NASDAQ ·Pharmaceutical Preparations ·Inc. in DE
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    Financial statements

    data from SEC XBRL filings. Values are as-reported; restatements supersede originals. Values reported in .

    From 10-Q filed 2026-05-05 (period ending 2026-03-31).

    ITEM 2.MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

    You should read the following discussion and analysis of our financial condition and results of operations together with our Unaudited Condensed Consolidated Financial Statements and related notes included in Part I, Item 1 of this Quarterly Report on Form 10-Q (the “Quarterly Report”) and with our Audited Consolidated Financial Statements and related notes thereto for the year ended December 31, 2025, included in our Annual Report on Form 10-K filed with the Securities and Exchange Commission (the “SEC”) on February 25, 2026.

    Forward-Looking Statements

    This Quarterly Report contains certain forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended (the “Securities Act”), and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). All statements other than statements of historical fact, including statements concerning our plans, objectives, goals, strategies, future events, future revenues or performance, financing needs, expectations, plans or intentions relating to clinical development, product candidates, the regulatory approval process, products and markets, and business trends and other information referred to under the sections entitled “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” are forward-looking statements. These statements are subject to substantial known and unknown risks, uncertainties and other factors that may cause our actual results, outcomes, performance or achievements, or the timing of such results, outcomes, performance or achievements, to be materially different from any results, outcomes, performances or achievements expressed or implied by the forward-looking statements. In some cases, you can identify forward-looking statements by terms such as “anticipates,” “assumes,” “believes,” “commitments,” “could,” “estimates,” “expects,” “forecasts,” “intends,” “may,” “plans,” “potential,” “predicts,” “projects,” “should,” “targets,” “will,” “would,” “seeks” and similar expressions intended to identify forward-looking statements. Forward-looking statements reflect our current views with respect to future events, are based on assumptions, and are subject to risks, uncertainties and other important factors, including, among other things, the potential for our programs; the timing, initiation, progress and expected results of our clinical trials and research and development programs, including enrollment, data, costs and regulatory submissions and approvals; our cash runway; our ability to advance product candidates into, and successfully complete, nonclinical studies and clinical trials; our eligibility for, and any expected benefits of, any U.S. Food and Drug Administration (“FDA”) programs or special designations; the potential for eventual regulatory approval and commercialization of our product candidates; the commercialization of our product candidates, if approved; our ability and the potential to successfully manufacture and supply our product candidates for clinical trials and for commercial use, if approved; the pricing, coverage, and reimbursement of our product candidates, if approved; our potential receipt of milestone payments and royalties under our collaboration agreements; future operating results; our ability and that of our collaboration partners to generate sales, income or cash flow; our estimates regarding expenses, capital requirements, and needs for additional financing and our ability to obtain additional capital; our ability to retain the continued service of our key executives and to identify, hire, and retain additional qualified professionals; developments relating to our competitors and our industry, including competing product candidates and therapies; uncertainty and disruption in the global economy and financial markets due to a number of factors, including but not limited to geopolitical instability, such as the ongoing military conflicts between Russia and Ukraine and in the Middle East and rising tensions between China and Taiwan, elevated and sustained inflation, high oil and other commodity prices and changes in trade policies, including tariffs or other trade restrictions or the threat of such actions and retaliatory actions; the availability of credit; and other factors. Forward-looking statements involve risks, uncertainties and assumptions that are beyond our ability to control or predict, including those risks, uncertainties and assumptions discussed in Part II, Item 1A, of this Quarterly Report, Part 1. Item 1A of our Annual Report on Form 10-K for the year ended December 31, 2025 and in our other filings with the SEC. These statements are based on information available to us as of the date of this Quarterly Report and, while we believe such information provides a reasonable basis for these statements, the information may be limited or incomplete, and our statements should not be read to indicate that we have conducted an exhaustive inquiry into, or review of, all potentially available relevant information. Given these risks, uncertainties and other important factors, you should not place undue reliance on these forward-looking statements. Also, forward-looking statements represent our estimates and assumptions only as of the date of this Quarterly Report. Except as required by law, we assume no obligation to update any forward-looking statements publicly, or to update the reasons actual results or outcomes could differ materially from those anticipated in any forward-looking statements,

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    whether as a result of new information, future developments, changes in assumptions or otherwise. We caution investors that our business and financial performance are subject to substantial risks and uncertainties.

    “Protagonist,” the Protagonist logo and other trademarks, service marks and trade names of Protagonist are registered and unregistered marks of Protagonist Therapeutics, Inc. in the United States and other jurisdictions.

    Overview

    We are a discovery through late-stage development biopharmaceutical company with a proprietary peptide technology platform that enables de novo discovery of peptide therapeutics. Our development products and discovery programs fall into three broad therapeutic areas: (i) inflammation and immunology (“I&I”), (ii) hematology and (iii) metabolic diseases. Our aim is to develop medicines for biologically and commercially validated targets which demonstrate a strong differentiation compared to existing therapies.

    ICOTYDE™ (icotrokinra)

    ICOTYDE™ (icotrokinra) was approved in the United States in March 2026 for the treatment of moderate-to-severe plaque psoriasis in adults and pediatric patients 12 years of age or older who weigh at least 40 kg and are candidates for systemic therapy or phototherapy. ICOTYDE is the first and only targeted oral peptide that precisely blocks the Interleukin-23 receptor (“IL-23R”), which underpins the inflammatory response in psoriasis and offers potential in other IL-23-mediated diseases. ICOTYDE is licensed to Janssen Biotech, Inc., a Johnson & Johnson company (“JNJ”), under a license and collaboration agreement initially entered into in 2017. Following ICOTYDE’s joint discovery by Protagonist and JNJ scientists, we were primarily responsible for the development of ICOTYDE through Phase 1, with JNJ assuming responsibility for further development and commercialization. In September 2025, JNJ submitted an application to the European Medicines Agency (“EMA”) seeking the first approval of ICOTYDE for the treatment of adults and pediatric patients 12 years of age or older with moderate-to-severe plaque psoriasis. ICOTYDE is in Phase 3 development for additional indications including psoriatic arthritis, ulcerative colitis and Crohn’s disease.

    Rusfertide

    Rusfertide is a first-in-class investigational injectable mimetic of the natural hormone hepcidin in development for the treatment of the rare blood disorder polycythemia vera (“PV”). We discovered rusfertide, advanced it into Phase 3 development, and in early 2024 entered into a co-development and co-commercialization arrangement with Takeda Pharmaceuticals, Inc. (“Takeda”) under a license and collaboration agreement entered into in January 2024. We remained primarily responsible for clinical development activities through rusfertide’s New Drug Application (“NDA”) filing for the treatment of erythrocytosis in patients with PV, which we and Takeda submitted in December 2025. In March 2026, the FDA accepted the NDA and granted Priority Review status for rusfertide. Rusfertide has also previously received Orphan Drug status, Fast Track designation and, in August 2025, Breakthrough Therapy designation (“BTD”). BTD is a process designed to expedite the development and review of drugs that are intended to treat a serious condition, and preliminary clinical evidence indicates that the drug may demonstrate substantial improvement over available therapies. BTD also provides eligibility for priority NDA review, and Orphan Drug status qualifies sponsors for various incentives, including the potential for extended market exclusivity. The NDA for rusfertide is currently under priority review by the FDA, with a Prescription Drug User Fee Act target action date in the third quarter of 2026. Takeda has disclosed that it expects to launch rusfertide in the second half of 2026, subject to regulatory approval.

    IL-17 Program

    PN-881. We are developing PN-881, a potential best-in-class oral peptide IL-17 antagonist, for the treatment of immune-mediated skin diseases. PN-881 targets three IL-17 dimers (IL-17 AA, AF and FF), and may offer potential treatment options for plaque psoriasis, psoriatic arthritis (“PsA”), hidradenitis suppurativa (“HS”), and spondyloarthritis.

    In October 2025, the first human subject was dosed in our Phase 1 trial of PN-881 (ClinicalTrials.gov identifier NCT07153146) evaluating its safety, tolerability, pharmacokinetics and pharmacodynamics in healthy adults. Results of

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    the PN-881 Phase 1 study are expected to inform the design and dosing in a subsequent dose-ranging psoriasis trial. We expect to complete the Phase 1 study by mid-2026 and initiate a Phase 2 trial by the end of 2026.

    Obesity Program

    PN-477. In June 2025, we nominated PN-477, a potential best-in-class novel triple GLP-1, GIP and GCG receptor agonist peptide with oral (“PN-477o”) and subcutaneous (“PN-477sc”) routes of administration, as a development candidate for the treatment of obesity. We designed PN-477 to offer an optimal combination of total body weight loss, improved gastrointestinal tolerability and fat to lean mass ratio, with the dosing convenience of a once-daily oral agent and the added optionality of a once-weekly subcutaneous administration. IND-enabling studies of PN-477 are underway and the initiation of Phase 1 clinical studies in PN-477sc and PN-477o are anticipated in mid-2026 and the first quarter of 2027, respectively.

    PN-458. In December 2025, we nominated development candidate PN-458, a potential best-in-class novel dual GLP-1 and GIP receptor agonist peptide, as a development candidate for the treatment of obesity, with optionality for both an oral (“PN-458o”) and subcutaneous (“PN-458sc”) formulation. IND-enabling studies for PN-458o and PN-458sc are ongoing.

    Oral Hepcidin Program

    PN-8047. In December 2025, we nominated development candidate PN-8047, an orally administered small molecule hepcidin functional mimetic, which we believe may be complementary to the injectable rusfertide for offering the best treatment options for PV. IND-enabling studies for PN-8047 are ongoing.

    Other Programs

    We also have pre-clinical stage drug discovery programs addressing biologically and commercially validated targets, including an oral IL-4R alpha antagonist for the treatment of atopic dermatitis and moderate-to-severe asthma, and amylinR-based oral and subcutaneous mono- and poly-agonists for the treatment of obesity.

    Significant Cash Resources

    We ended the first quarter of 2026 with cash, cash equivalents and marketable securities of approximately $620.3 million, as compared to cash, cash equivalents and marketable securities of approximately $646.0 million as of December 31, 2025. For the remainder of 2026 and beyond, we are eligible to receive significant milestone, royalty and other payments from our collaborations with JNJ and Takeda, as described below. The receipt of future royalties and commercial milestones is contingent upon the relevant products receiving FDA approval and achieving a successful commercial launch.

    Collaboration Agreements

    JNJ License and Collaboration Agreement

    We and JNJ are parties to a license and collaboration agreement related to the development and commercialization of ICOTYDE. We entered into the agreement in July 2017, and amended it in May 2019, July 2021 and November 2024 (as amended, the “JNJ License and Collaboration Agreement”). Pursuant to the JNJ License and Collaboration Agreement, we were primarily responsible for the discovery, IND-enabling studies, and the initial Phase 1 study for ICOTYDE, and JNJ is primarily responsible for conducting all further development.

    In March 2026, we earned a $50.0 million milestone payment upon FDA approval of ICOTYDE for the treatment of moderate-to-severe plaque psoriasis in adults and pediatric patients 12 years of age or older who weigh at least 40 kg and are candidates for systemic therapy or phototherapy. As of March 31, 2026, we have earned a total of

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    $387.5 million in non-refundable payments from JNJ under the agreement. We are eligible to receive up to $580.0 million in future development and sales milestone payments, including the following potential milestones:

    We will also receive upward tiering royalties on net worldwide ICOTYDE product sales at percentages ranging from 6% to 10%. Our weighted-average royalty rate on the first $4.0 billion in annual net sales is 7.25%, and the rate on net sales over $4.0 billion is 10%. See Note 3 to the condensed consolidated financial statements included elsewhere in this Quarterly Report for additional information.

    Takeda Collaboration Agreement

    In January 2024, we entered into a worldwide license and collaboration agreement for rusfertide with Takeda (the “Takeda Collaboration Agreement”) related to rusfertide (and specified second-generation injectable hepcidin mimetic compounds developed and commercialized under the agreement that are not currently in development). In December 2025, we and Takeda submitted an NDA to the FDA for rusfertide in PV, which is currently under priority review. We were primarily responsible for the clinical development of rusfertide through NDA filing and remain primarily responsible for the conduct of ongoing rusfertide long-term extension studies. Under the terms of the agreement, we received an upfront payment of $300.0 million in April 2024 and a $25.0 million milestone payment in September 2025 upon completion of the Phase 3 VERIFY clinical trial (NCT05210790) report.

    Effective April 28, 2026, we exercised our right to opt-out of the U.S. profit and loss sharing arrangement (50% to us and 50% to Takeda) under the Takeda Collaboration Agreement. The opt-out election triggered a $200.0 million payment to us, with an additional $200.0 million opt-out fee and a separate $75.0 million milestone upon FDA approval of rusfertide. Following the opt-out, Takeda has an exclusive worldwide license to develop and commercialize rusfertide, and we are eligible to receive tiered royalties ranging from 14% to 29% on annual worldwide net sales, with an approximate weighted-average royalty rate of 21% at $1.5 billion in annual net sales and a rate of 29% for incremental annual net sales over $1.5 billion. In addition, under the agreement, we are eligible to receive up to an aggregate of $975.0 million in development, regulatory and sales milestones, including the $25.0 million milestone payment already received in September 2025. Upcoming potential development milestones and potential sales milestones under the agreement include the following:

    See Note 3 to the condensed consolidated financial statements included elsewhere in this Quarterly Report for further details related to the agreement.

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    Risks and Uncertainties

    We describe the respective risks, uncertainties and assumptions that could affect our business, financial condition or results of operations in Part II, Item 1A. “Risk Factors” herein and in Part 1, Item 1A. “Risk Factors” in our Annual Report on Form 10-K for the year ended December 31, 2025.

    Operations

    We have incurred cumulative net losses from inception through March 31, 2026 of $466.9 million. Substantially all of our net losses have resulted from costs incurred in connection with our research and development programs and from general and administrative costs associated with our operations. We expect to continue to incur significant research and development expenses, and other expenses related to our ongoing operations, clinical development and pre-clinical discovery programs.

    Critical Accounting Polices and Estimates

    Our management’s discussion and analysis of our financial condition and results of operations is based on our unaudited condensed consolidated financial statements, which have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”). The preparation of these unaudited condensed consolidated financial statements requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent liabilities at the date of the unaudited condensed consolidated financial statements, as well as the reported revenue generated and expenses incurred during the reporting periods. Our estimates are based on our historical experience and on various other factors that we believe are reasonable under the circumstances, and the results of which form the basis for making judgments about the carrying value of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions.

    There have been no material changes to our critical accounting policies during the three months ended March 31, 2026, as compared to those disclosed in “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Critical Accounting Policies and Estimates” in our Annual Report for the year ended December 31, 2025 filed with the SEC on February 25, 2026.

    Components of Our Results of Operations

    License and Collaboration Revenue

    Our license and collaboration revenue is derived from payments we receive from our collaboration partners under the JNJ License and Collaboration Agreement and the Takeda Collaboration Agreement. We expect our revenue to increase significantly in future periods due to the receipt of milestone payments, including payments related to NDA approvals and the exercise of our opt-out right under the Takeda Collaboration Agreement, and royalties for sales of ICOTYDE for moderate-to-severe plaque psoriasis, and in other indications if approved. We also expect to receive royalties for rusfertide in PV if NDA approval is received and the product is successfully commercialized. See Note 3 to the condensed consolidated financial statements included elsewhere in this Quarterly Report for additional information.

    Research and Development Expenses

    Research and development expenses represent costs incurred to conduct research, such as the discovery and development of our product candidates. We recognize all research and development costs as they are incurred unless there is an alternative future use in other research and development projects or otherwise. Non-refundable advance payments for goods and services that will be used in future research and development activities are expensed when the activity has been performed or when the goods have been received rather than when payment has been made. In instances where we enter into agreements with third parties to provide research and development services to us, costs are expensed as services are performed. Amounts due under such arrangements may be either fixed fee or fee for service and may include upfront payments, monthly payments, and payments upon the completion of milestones or the receipt of deliverables.

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    Research and development expenses consist primarily of the following:

    expenses incurred under agreements with clinical trial sites that conduct research and development activities on our behalf;
    employee-related expenses, which include salaries, benefits and stock-based compensation;
    laboratory vendor expenses related to the preparation and conduct of pre-clinical studies and clinical trials;
    costs related to production of clinical supplies and pre-clinical materials, including fees paid to contract manufacturers;
    license fees and milestone payments under license and collaboration agreements; and
    facilities and other allocated expenses, which include expenses for rent and maintenance of facilities, information technology, depreciation and amortization expense and administrative and other supplies.

    We allocate direct and indirect costs incurred to product candidates when they enter clinical development. For product candidates in clinical development, direct costs consist primarily of clinical, pre-clinical, and drug discovery costs, costs of supplying drug substance and drug product for use in clinical and pre-clinical studies, including clinical manufacturing costs, contract research organization fees, and other contracted services pertaining to specific clinical and pre-clinical studies. Indirect costs allocated to our product candidates on a program-specific basis include research and development employee salaries, benefits, and stock-based compensation, and indirect overhead and other administrative support costs. Program-specific costs are unallocated when the related expenses are incurred for our early-stage research and drug discovery projects as our internal resources, employees and infrastructure are not tied to any one research or drug discovery project and are typically deployed across multiple projects. As such, we do not provide financial information regarding the costs incurred for early-stage pre-clinical and drug discovery programs on a program-specific basis prior to the clinical development stage.

    We expect our research and development expenses to increase in the near term as compared to the prior year period as we continue to focus our resources toward advancing our pre-clinical and drug discovery research and clinical programs, including progressing our product development candidates PN-881, PN-477, PN-458 and PN-8047 through IND-enabling studies, or foreign equivalents. The process of conducting research, identifying potential product candidates, conducting pre-clinical studies and clinical trials necessary to obtain regulatory approval and commencing pre-commercialization activities is costly and time intensive. We may never succeed in achieving marketing approval for our current or future product candidates regardless of our costs and efforts. The probability of success of our product candidates may be affected by numerous factors, including pre-clinical data, clinical data, competition, manufacturing capability, our cost of goods to be sold, our ability to receive, and the timing of, regulatory approvals, market conditions, and our ability to successfully commercialize our products if they are approved for marketing. As a result, we are unable to determine the duration and completion costs of our research and development projects or when and to what extent we will be able to generate revenue from the commercialization and sale of any of our current or future product candidates. Our research and development programs are subject to change from time to time as we evaluate our priorities and available resources.

    General and Administrative Expenses

    General and administrative expenses consist of personnel costs, allocated costs and other expenses for outside professional services, including legal, human resources, audit and accounting services. Personnel costs consist of salaries, benefits and stock-based compensation. Allocated costs consist of expenses for rent and maintenance of facilities, information technology, depreciation and amortization expense and administrative supplies. We expect to continue to incur expenses to support our continued operations as a public company, including expenses related to compliance with the rules and regulations of the SEC and those of the national securities exchange on which our

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    securities are traded, insurance expenses, investor relations expenses, audit fees, professional services and general overhead and administrative costs.

    Interest Income

    Interest income consists of interest earned on our cash, cash equivalents and marketable securities, which is comprised of contractual interest, premium amortization and discount accretion.

    Other Income, Net

    Other income, net consists primarily of amounts related to foreign exchange gains and losses, realized gains and losses on sale of marketable securities and related items.

    Results of Operations

    Comparison of the Three Months Ended March 31, 2026 and 2025

    Three Months Ended

    March 31, 

    Dollar

    %

      ​ ​ ​

    2026

      ​ ​ ​

    2025

      ​ ​ ​

    Change

      ​ ​ ​

    Change

    (Dollars in thousands)

    License and collaboration revenue

    $

    56,368

    $

    28,321

    $

    28,047

    99

    Operating expenses:

     

      ​

     

      ​

     

      ​

     

      ​

    Research and development (1)

    46,739

    35,893

    10,846

     

    30

    General and administrative (2)

     

    13,277

     

    11,738

     

    1,539

     

    13

    Total operating expenses

     

    60,016

     

    47,631

     

    12,385

     

    26

    Loss from operations

     

    (3,648)

     

    (19,310)

     

    15,662

     

    (81)

    Interest income

     

    5,876

    7,573

     

    (1,697)

     

    (22)

    Other income, net

    53

    82

    (29)

    (35)

    Income (loss) before income tax benefit

    2,281

    (11,655)

    13,936

    (120)

    Income tax benefit

    1,502

    1,502

    *

    Net income (loss)

    $

    3,783

    $

    (11,655)

    $

    15,438

     

    (132)

    *Percentage not meaningful.

    (1)Includes $7.8 million and $8.0 million of non-cash stock-based compensation expense for the three months ended March 31, 2026 and 2025, respectively.
    (2)Includes $6.7 million and $5.8 million of non-cash stock-based compensation expense for the three months ended March 31, 2026 and 2025, respectively.

    License and Collaboration Revenue

    License and collaboration revenue was comprised of the following for the periods presented:

    Three Months Ended March 31, 

    Dollar

    %

      ​ ​ ​

    2026

      ​ ​ ​

    2025

      ​ ​ ​

    Change

      ​ ​ ​

    Change

    (Dollars in thousands)

    License and collaboration revenue:

    JNJ License and Collaboration Agreement revenue

    $

    50,000

    $

    $

    50,000

    *

    Takeda Collaboration Agreement revenue

     

    6,368

     

    28,321

     

    (21,953)

     

    (78)

    Total license and collaboration revenue

    $

    56,368

    $

    28,321

    $

    28,047

     

    99

    *Percentage not meaningful.

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    Our revenue is derived from licensing and collaboration agreements and is highly variable and dependent upon factors such as the timing of when regulatory and sales milestones are achieved, if at all, and the accounting for any upfront payments associated with any existing or new agreements.

    License and collaboration revenue for the three months ended March 31, 2026 of $56.4 million was comprised of (i) a $50.0 million milestone payment related to the JNJ License and Collaboration Agreement upon FDA approval of ICOTYDE for the treatment of moderate-to-severe plaque psoriasis, (ii) $3.3 million related to the Takeda Collaboration Agreement for development services provided by us during the period using the cost-based input method, and (iii) $3.1 million from Takeda for rusfertide clinical supplies. The remaining $6.3 million in deferred revenue as of March 31, 2026 will be recognized through the conclusion of the development services performance obligation.

    License and collaboration revenue for the three months ended March 31, 2025 of $28.3 million was related to the Takeda Collaboration Agreement, including (i) $22.8 million related to the proportional recognition of the $25.0 milestone deemed probable of being achieved due to the Phase 3 VERIFY trial meeting its primary endpoint and (ii) $5.5 million related to the initial transaction price for development services provided by us during the period. Revenue recognition for the $25.0 million milestone, which was payable upon completion of the VERIFY clinical study report, was allocated based on the initial standalone selling price of each performance obligation under the agreement. The remaining $2.2 million in revenue related to the milestone is recognized through the conclusion of the development services performance obligation. We recorded a corresponding contract asset of $22.8 million on our condensed consolidated balance sheet as of March 31, 2025.

    As described above, we opted out of the U.S. profit and loss sharing arrangement right under the Takeda Collaboration Agreement in April 2026 and are eligible to receive up to $400.0 million in payments, along with an enhanced milestone payment of $75.0 million upon the FDA’s approval of rusfertide. In addition, we expect to receive significant royalties in 2026 from the launch of ICOTYDE and may receive royalties from rusfertide, pending potential FDA approval and commercial launch.

    Research and Development Expenses

    Three Months Ended

    March 31, 

    Dollar

    %

      ​ ​ ​

    2026

    2025

    Change

    Change

    (Dollars in thousands)

    Clinical and development expense — rusfertide

    $

    17,449

    $

    21,400

    $

    (3,951)

    (18)

    Clinical and development expense — PN-881

    8,883

    8,883

    *

    Clinical and development expense — other

    51

    116

    (65)

    (56)

    Pre-clinical and drug discovery research expense

    20,356

    14,377

    5,979

    42

    Total research and development expenses

    $

    46,739

    $

    35,893

    $

    10,846

    30

    *Percentage not meaningful.

    Research and development expenses increased $10.8 million, or 30%, from $35.9 million for the three months ended March 31, 2025 to $46.7 million for the three months ended March 31, 2026. The increase was primarily due to an increase of $8.9 million in costs related to our Phase 1 study for development candidate PN-881 initiated in the third quarter of 2025 and a $6.0 million increase in pre-clinical and drug discovery research program expense, partially offset by a decrease of $4.0 million in rusfertide expenses primarily related to the completion of our Phase 3 VERIFY trial during the first quarter of 2025.

    We had 100 and 97 full-time equivalent research and development head count as of March 31, 2026 and 2025, respectively. Research and development personnel-related expenses for the three months ended March 31, 2026 increased by $1.0 million as compared to the three months ended March 31, 2025, primarily driven by increases in wages and benefits.

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    We expect research and development expenses to increase significantly as compared to prior periods as we continue to invest in new discovery programs and our disclosed pre-clinical programs and advance multiple clinical candidates into development. The timing and magnitude of these expenses will vary depending on the progress or our programs, including the initiation and pace of clinical trials and related development activities.

    General and Administrative Expenses

    General and administrative expenses increased $1.5 million, or 13%, from $11.7 million for the three months ended March 31, 2025 to $13.3 million for the three months ended March 31, 2026. The increase was primarily due to a $1.8 million increase in personnel-related expenses, primarily driven by increases in wages and benefits and stock-based compensation, partially offset by a $0.3 million decrease in professional services and other expenses.

    We had 31 and 27 full-time equivalent general and administrative head count as of March 31, 2026 and 2025, respectively.

    Interest Income

    Interest income decreased by $1.7 million, or 22%, from $7.6 million for the three months ended March 31, 2025 to $5.9 for million for the three months ended March 31, 2026 due to a decrease in invested balances and lower effective yields.

    Income Tax Benefit

    Income tax benefit was $1.5 million and zero for the three months ended March 31, 2026 and 2025, respectively. Income tax benefit for the three months ended March 31, 2026 included a discrete credit for stock-based compensation expense specific to the current quarter.

    Liquidity and Capital Resources

    Sources of Liquidity

    We had $620.3 million and $646.0 million in cash, cash equivalents and marketable securities as of March 31, 2026 and December 31, 2025, respectively. Historically, we have funded our operations primarily from receipt of payments under collaboration agreements, as discussed in “Collaboration Agreements” above, and net proceeds from the sale of shares of our common stock.

    Capital Requirements

    As of March 31, 2026, we had $620.3 million in cash, cash equivalents and marketable securities and an accumulated deficit of $466.9 million. Our capital expenditures were $0.2 million and $1.6 million for the three months ended March 31, 2026 and the year ended December 31, 2025, respectively. Our primary uses of cash are to fund our operating expenses, including our research and development expenditures and general and administrative costs. We expect that our existing cash, cash equivalents and marketable securities will be sufficient to fund our operations for at least the next twelve months from the date of this Quarterly Report based on current operating plans and financial forecasts.

    We do not currently anticipate a need for additional funding in the near term. However, we may require additional funding in the future to advance our discovery pipeline and to develop, acquire, or in-license other potential product candidates. Our future funding requirements will depend on many factors, including those described in Part II, Item 1A, “Risk Factors” herein and in Part 1, Item 1A, “Risk Factors” in our Annual Report on Form 10-K for the year ended December 31, 2025. Such additional funding may come from various sources, including raising additional capital, seeking access to debt, and seeking additional collaborative or other arrangements with partners, but such funding may not be available on terms acceptable to us, if at all.

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    Held by

    holders ( registered funds via N-PORT, institutional investors via 13F). Showing top by dollar value.

    Holder Type ETF MF Position ($) % of holder Δ % of holder Holder AUM

    Recent insider activity

    Last 90 days. Open-market trades (purchases & sales) by directors, officers, and 10%+ owners. 13 transactions across 6 insiders. Net: -347,345 shares, -$35,185,386.

    Date Insider Role Action Shares Price Value
    2026-06-10 Waddill William D. Director Sell -9,000 $107.68 -$969,120
    2026-05-29 Waddill William D. Director Sell -9,000 $99.64 -$896,760
    2026-05-12 PATEL DINESH V PH D President and CEO Sell -150,000 ×2 $100.12 -$15,018,000
    2026-05-08 Giraudo Bryan Director Sell -5,130 $100.00 -$513,000
    2026-05-08 Giraudo Bryan indirect Director Sell -6,000 $100.00 -$600,000
    2026-05-07 Giraudo Bryan indirect Director Sell -12,000 $100.07 -$1,200,840
    2026-05-07 Giraudo Bryan Director Sell -36,000 $100.14 -$3,605,040
    2026-04-20 Ali Asif Chief Financial Officer Sell -1,750 $105.47 -$184,572
    2026-03-26 Ali Asif Chief Financial Officer Sell -24,765 $104.24 -$2,581,504
    2026-03-26 SELICK HAROLD E Director Sell -24,000 $105.00 -$2,520,000
    2026-03-26 MOLINA ARTURO MD Chief Medical Officer Sell -15,000 $104.79 -$1,571,850
    2026-03-25 PATEL DINESH V PH D President and CEO Sell -54,641 $101.00 -$5,518,741
    2026-03-24 PATEL DINESH V PH D President and CEO Sell -59 $101.00 -$5,959

    Source: SEC Form 4 filings.

    Next expected filings

    • ~2026-08-05 10-Q expected by 2026-08-09 (in 49 days)
    • ~2026-11-05 10-Q expected by 2026-11-09 (in 141 days)
    • ~2027-02-25 10-K expected by 2027-03-06 (in 253 days)
    • ~2027-05-04 10-Q expected by 2027-05-08 (in 321 days)

    Predicted from historical filing cadence; not an SEC commitment.

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