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Coya Therapeutics, Inc.

For the period ended Mar 31, 2026. Filed May 12, 2026.

View on SEC.gov

About this filing

A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Mar 31, 2026 · Filed May 12, 2026

COYA$2.99+6.4%Stored close · as of Nov 6, 2026

What changed in Management’s Discussion and Analysis?

Read the current filing

Previous report: 10-Q

Period ended 2025-09-30; filed 2025-11-12.

0001193125-25-276058

Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

Current report: 10-Q

Period ended 2026-03-31; filed 2026-05-12.

0001193125-26-218201

Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

The baseline is this issuer’s latest earlier reporting period of the same form that was filed before the current report. A previous 10-Q is a different quarter, not a year-over-year comparison. Amendments are excluded.

Compared 135 previous paragraphs and 140 current paragraphs.

102 unchanged; 16 reworded; 22 added; 14 removed; 3 previous and 0 current paragraphs rearranged.

Tables are not compared: 5 previous and 3 current tables excluded. Dates, whitespace, punctuation and numbering changes are ignored; changes to financial figures remain significant.

A changed paragraph is not evidence that risk increased or decreased. An unchanged paragraph does not establish that risk stayed the same.

Added paragraphs (22)

Current report

As of May 1, 2026, our patent estate derived from our relationship with The Houston Methodist Hospital includes one U.S. provisional patent application, seven U.S. non-provisional patent applications, 43 foreign patent applications, and three pending Patent Cooperation Treaty (“PCT”) applications, each co-owned with or in-licensed from The Houston Methodist Hospital. These patent applications are directed to our Treg and exosome compositions and methods of use, methods of Treg and exosome manufacture, and methods of in vivo Treg expansion via combination therapies, among other things. If any patents issue from or claim priority to these patent applications, the patents are expected to expire in 2040, 2042 and 2044-2046 without giving effect to any potential patent term extensions or patent term adjustments and assuming payment of all appropriate maintenance, renewal, annuity or other governmental fees. All of our pending Houston Methodist Hospital patent applications have composition and method claims, with the exception of a biomarker patent application, which has only method claims.

Current report

In addition, our patent estate derived from our relationship with ARScience Biotherapeutics, Inc. (described below) includes three pending U.S. non-provisional patent applications, one issued U.S. patent, nine pending foreign patent applications and two issued foreign patents. The issued U.S. patent is expected to expire in 2042, the issued foreign patents are expected to expire in 2039, and any other patents that may issue from or claim priority to one or more of these patents or patent applications, if granted, are expected to expire between 2039 and 2041, without giving effect to any potential patent term extensions or patent term adjustments and assuming payment of all appropriate maintenance, renewal, annuity, or other governmental fees. The ARScience Biotherapeutics, Inc. patents have composition, method, and/or utility claims.

Current report

In addition, our patent estate derived from our relationship with Dr Reddy’s Laboratories includes two pending U.S. non-provisional patent applications, one issued U.S. patent, 15 pending foreign patent applications and five issued foreign patents. The issued U.S. patent is expected to expire in 2042, the issued foreign patents are expected to expire in 2039, and any other patents that may issue from or claim priority to one or more of these patents or patent applications, if granted, are expected to expire in 2039, 2041, or 2042, without giving effect to any potential patent term extensions or patent term adjustments and assuming payment of all appropriate maintenance, renewal, annuity, or other governmental fees. The Dr. Reddy’s patents and patent applications have composition, method and/or utility claims.

Current report

In addition, our patent estate derived from our relationship with the University of Nebraska includes two pending non-provisional U.S. patent applications and one pending foreign patent application. If any patents issue from or claim priority to these patent applications, the patents are expected to expire in 2043 and 2044, without giving effect to any potential patent term extensions or patent term adjustments and assuming payment of all appropriate maintenance, renewal, annuity, or other governmental fees. The University of Nebraska patent applications have composition and/or method claims.

Current report

Finally, our patent estate derived from our relationship with Carnegie Mellon includes two pending U.S. non-provisional patent applications. If any patents issue from or claim priority to these patent applications, the patents would be expected to expire in 2040 and 2044, without giving effect to any potential patent term extensions or patent term adjustments and assuming payment of all appropriate maintenance, renewal, annuity, or other governmental fees. The Carnegie Mellon patent applications have composition and/or method claims.

Current report

In January of 2026, we entered into a Securities Purchase Agreement with certain accredited investors for the issuance and sale in a private placement of 2,522,727 shares of our common stock, or the January 2026 Offering. The January 2026 Offering closed on January 30, 2026 and each share was offered and sold at an offering price of $4.40 per share. Gross proceeds from the private placement were approximately $11.1 million, before deducting offering costs payable by us.

Current report

General and administrative expenses increased by $1.1 million from $2.7 million for the three months ended March 31, 2025 compared to $3.8 million for the three months ended March 31, 2026. The increase was primarily due to an $1.1 million increase in employee compensation, which included a non-cash charge of $1.0 million related to the modification of stock options held by the our former Executive Chairman in connection with his resignation.

Current report

During the three months ended March 31, 2026, we paid $0.9 million in in-process research and development assets, which we incurred in 2025.

Current report

We had no investing activities during the three months ended March 31, 2025.

Current report

During the three months ended March 31, 2026, financing activities provided $11.0 million of cash from the net proceeds from the issuance of common stock in the January Offering.

Current report

In May 2023, we entered into an SRA with HMRI in which the Company agreed to fund approximately $0.5 million through May 2024. Along with HMRI, we have subsequently amended the SRA multiple times to increase agreed funding and, at times, extend the term. In January 2026, we entered into another SRA with HMRI in which we agreed to fund research through the earlier of completion of the research or 12 months. The maximum funding commitment is $0.6 million. During the three months ended March 31, 2026 and 2025, we incurred $0.1 million and $0.2 million, respectively, in research and development expenses related to the SRA.

Current report

In 2023, the Company granted DRL an exclusive, royalty-bearing right and license to commercialize COYA 302 (Note 9).
Removed paragraphs (14)

Previous report

On April 21, 2025, we published the results of the study with our new product candidate. The study was designed to evaluate the effects of COYA 303 (LD IL-2 and GLP-1RA), our investigational biologic combination to suppress pro inflammatory myeloid cells, enhance Treg suppressive function, and modulate T cell proliferation, in anin vitro system of human immune cells obtained from healthy donors. The research was conducted at the Houston Methodist Research Institute and was led by Dr. Aaron Thome and Dr. Stan Appel. The research article has been published in the Journal NeuroImmune Pharmacology and Therapeutics. The study found, among other things, that following pro-inflammatory activation of myeloid cells co cultured with Tregs, the addition of COYA 301 (LD IL-2) alone enhanced Treg suppressive function by 15%. Similarly, when GLP-1RA alone was added to the system, Treg suppressive function increased by 20%. In contrast, when COYA 303 was added to the cell system a statistically significant increase in Treg suppressive function of 42% (p < 0.001) was observed, when compared to the increase observed with each of the single agents. Consistent with these results, treatment with COYA 303 promoted Treg survival by modulating the apoptotic pathway. COYA 303 significantly reduced BAX transcript levels during prolonged incubation (p < 0.01). These findings suggest a direct effect of COYA 303 supporting Treg survival through the inhibition of Treg apoptosis. We believe that these data show that the combination approach of COYA 303 enhances Treg suppressive function in highly inflammatory microenvironments, while also promoting Treg survival by preventing apoptosis.

Previous report

On June 2, 2025, we announced the issuance of a U.S. patent relevant to our investigational ready-to-use liquid formulation of IL-2, which covers methods of producing highly stable liquid formulations of IL-2 (aldesleukin). Through an existing agreement, we have the exclusive in-vivo rights to this patent and other related intellectual property spanning multiple indications both as monotherapy and combination therapies.

Previous report

On August 29, 2025, the FDA accepted our Investigational New Drug Application, or IND, for the initiation of a planned clinical study entitled “Phase 2, Randomized, Double-Blind, Placebo-Controlled, Multi-Center, 24-Week Study with Additional 24-Week Open Label Extension (OLE) to Evaluate the Safety and Efficacy of COYA 302 for the Treatment of Amyotrophic Lateral Sclerosis (ALS)”, or the Phase 2 Study. As a result of the FDA’s acceptance of the IND for COYA 302, we received a $4.2 million milestone payment from Dr. Reddy’s (defined below) as required under the terms of the Development and License Agreement, or the DRL Development Agreement.

Previous report

On October 23, 2025, we entered into an Underwriting Agreement with Lucid Capital Markets, LLC, or the Underwriter, relating to an underwritten public offering, or the Offering, of 4,181,818 shares, or the Shares, of our common stock, par value $0.0001 per share, including 545,454 Shares pursuant to the full exercise of an option to purchase additional shares granted to the Underwriter. The Offering closed on October 27, 2025 and each Share was offered and sold to the public at an offering price of $5.50 per Share. Gross proceeds from the Offering, including the proceeds from the exercise by the Underwriter of its option to purchase additional Shares, was approximately $23.0 million, before deducting underwriting discounts and commissions and estimated Offering expenses payable by us.

Previous report

R&D Services revenue is calculated quarterly using the inputs approach, by applying actual COYA 302 expenses against budgeted COYA 302 expenses as the two inputs. Collaboration revenue was $3.6 million for the three months ended September 30, 2025 primarily due to the immediate recognition of $3.3 million of License revenue upon receiving FDA acceptance of our IND for the Phase 2 Study during the three months ended September 30, 2025.

Previous report

General and administrative expenses increased by $0.3 million from $2.2 million for the three months ended September 30, 2024 compared to $2.6 million for the three months ended September 30, 2025. The increase was primarily due to a $0.2 million increase in employee compensation and a $0.1 million increase in public filing and listing costs.

Previous report

Other income was $0.3 million and $0.4 million for the three months ended September 30, 2025 and 2024, respectively. The decrease was primarily due to a decline in interest and dividend income earned on cash balances.

Previous report

Comparison of the nine months ended September 30, 2025 and 2024

Previous report

General and administrative expenses increased by $1.4 million from $6.7 million for the nine months ended September 30, 2024 compared to $8.2 million for the nine months ended September 30, 2025. The increase was primarily due to an $1.0 million increase in employee compensation, a $0.3 million increase in professional services, and a $0.2 million increase in investor relation related expenses, partially offset by a $0.1 million decrease in board fees and taxes.

Previous report

During the nine months ended September 30, 2025 and 2024, we purchased $515,996 and $25,000 of in-process research and development assets.

Previous report

During the nine months ended September 30, 2024, financing activities provided $6.3 million of cash from the proceeds received from the sale of common stock of $5.0 million and the exercise of warrants of $1.5 million, partially offset by $0.1 million in payments of offering costs related to the 2023 private placement.

Previous report

In May 2023, we executed a Sponsored Research Agreement, or SRA, with Houston Methodist Research Institute, or HMRI, in which we agreed to fund approximately $0.5 million through May 2024. We have subsequently amended the SRA to increase agreed funding and, at times, extend the term. The latest amendment was entered in July 2025 to increase the total funding from $1.2 million to $1.4 million and to extend the term through December 31, 2025.

Previous report

On December 1, 2022, we exercised the ARS Option by written notice to ARS, or the Option Exercise Notice. Upon the delivery of the Option Exercise Notice (such date of delivery, the “Effective Date”), ARS automatically was deemed to have granted to us the licenses and all provisions of the ARS License Agreement and the ARS License Agreement became effective as of the Effective Date. Pursuant to the terms of the ARS License Agreement, we paid to ARS a mid-six-figure up-front fee.
Reworded paragraphs (16)

Previous wording

We have funded our operations primarily through the private and public sale of our securities. Our net losses were $2.1 million and $4.0 million for the three months ended September 30, 2025 and 2024, respectively. Our net losses were $15.5 million and $12.0 million for the nine months ended September 30, 2025 and 2024, respectively. As of September 30, 2025, we had an accumulated deficit of $56.3 million. Our primary use of cash is to fund operating expenses, which consist primarily of research and development expenditures and general and administrative expenditures. Our ability to generate product revenue sufficient to achieve profitability will depend heavily on the successful development and eventual commercialization of one or more of our current or future product candidates.

Current wording

We have funded our operations primarily through the private and public sale of our securities. Our net losses were $7.2 million and $7.3 million for the three months ended March 31, 2026 and 2025, respectively. As of March 31, 2026, we had an accumulated deficit of $69.2 million. Our primary use of cash is to fund operating expenses, which consist primarily of research and development expenditures and general and administrative expenditures. Our ability to generate product revenue sufficient to achieve profitability will depend heavily on the successful development and eventual commercialization of one or more of our current or future product candidates.

Previous wording

To date, we have not recognized any revenue from product sales, and we do not expect to generate any revenue from the sale of products in the foreseeable future. If our development efforts for our product candidates are successful and result in regulatory approval, or license agreements with third parties, we may generate revenue in the future from product sales. However, there can be no assurance as to when we will generate such revenue, if at all. Collaboration revenue represents revenue from the DRL Development Agreement, as amended in June 2024, pursuant to which we granted Dr. Reddy's Laboratories Ltd. and its affiliate, Dr. Reddy’s Laboratories SA, or collectively Dr. Reddy’s, an exclusive, royalty-bearing right and license to commercialize COYA 302, solely for use in patients with ALS in the United States, Canada, the European Union and the United Kingdom, or collectively, the New Territories.

Current wording

To date, we have not recognized any revenue from product sales, and we do not expect to generate any revenue from the sale of products in the foreseeable future. If our development efforts for our product candidates are successful and result in regulatory approval, or license agreements with third parties, we may generate revenue in the future from product sales. However, there can be no assurance as to when we will generate such revenue, if at all. Collaboration revenue represents revenue from the DRL Development Agreement, as amended in June 2024, pursuant to which we granted Dr. Reddy's Laboratories Ltd., or DRL, and its affiliate, Dr. Reddy’s Laboratories SA, or collectively Dr. Reddy’s, an exclusive, royalty-bearing right and license to commercialize COYA 302, solely for use in patients with ALS in the United States, Canada, the European Union and the United Kingdom, or collectively, the New Territories. Collaboration revenue includes two performance obligations, R&D Services and the License (both defined below). We allocate the transaction price to both performance obligations based on their estimated stand-alone selling price at contract inception. R&D Services revenue is recognized over time, using the inputs approach, by applying actual COYA 302 - ALS expenses against budgeted COYA 302 - ALS expenses. License revenue is recognized at a point in time upon delivery of the license or upon a cumulative catch-up adjustment in the event of a contract modification or achievement of milestones.

Previous wording

Research and development activities are central to our business model. Product candidates in later stages of clinical development generally have higher development costs than those in earlier stages of clinical development, primarily due to the increased size and duration of later-stage clinical trials. We expect our research and development expenses to increase significantly over the next several years as we increase personnel costs, including stock-based compensation, conduct our clinical trials, including later-stage clinical trials, for current and future product candidates and prepare regulatory filings for our product candidates. In addition, we expect spending in 2025 to increase over 2024 spending levels driven primarily by the advancement of COYA 302 in a Phase 2 study in patients with ALS and in the preparation for an IND for the study of COYA 302 in patients with FTD. As described in the notes to financial statements contained elsewhere in this Quarterly Report on Form 10-Q, under the terms of our license we may be required to make payments to Methodist if certain milestones are achieved. This could result in significant charges to research and development in the period such milestones become probable of being achieved.

Current wording

Research and development activities are central to our business model. Product candidates in later stages of clinical development generally have higher development costs than those in earlier stages of clinical development, primarily due to the increased size and duration of later-stage clinical trials. We expect our research and development expenses to increase significantly over the next several years as we increase personnel costs, including stock-based compensation, conduct our clinical trials, including later-stage clinical trials, for current and future product candidates and prepare regulatory filings for our product candidates. As described in the notes to financial statements contained elsewhere in this Quarterly Report on Form 10-Q, under the terms of our license we may be required to make payments to Methodist if certain milestones are achieved. This could result in significant charges to research and development in the period such milestones become probable of being achieved.

Previous wording

R&D Services revenue is calculated quarterly using the inputs approach, by applying actual COYA 302 expenses against budgeted COYA 302 expenses as the two inputs. Collaboration revenue was $4.0 million and $3.6 million for the nine months ended September 30, 2025 and 2024, respectively, related to R&D Services and License revenue. The increase of $0.4 million is primarily due to the immediate recognition of $3.3 million of License revenue upon receiving FDA acceptance of our IND for the Phase 2 Study and an increase in R&D Services revenue due to increased incurred expenses related to COYA 302.

Current wording

Collaboration revenue was $0.3 million for the three months ended March 31, 2026 and 2025 related to R&D Services revenue.

Previous wording

Research and development expenses increased by $1.9 million from $9.9 million for the nine months ended September 30, 2024 to $11.8 million for the nine months ended September 30, 2025. The increase was due to a $0.7 million increase in our preclinical and clinical expenses primarily due to our clinical advancement of COYA 302 in ALS, a $0.9 million increase in internal research and development expenses, and a $0.3 million increase in sponsored research. For our clinical product candidate (COYA 302), we track our external research and development expenses on a candidate-by-candidate basis. Coincident with FDA's approval of our IND of COYA 302 in patients with ALS, in the third quarter of 2025, we characterized expenses related to COYA 302 for ALS as clinical product candidate expenses. Prior to the third quarter of 2025, all expenses associated with COYA 302 for ALS were included among the preclinical product candidate expenses captioned as COYA 300 Series. For our preclinical product candidates, we track our external research and development expenses by Series. External research and development expenses include fees paid to CROs and CMOs and fees paid to regulatory, clinical trial and manufacturing professional service firms largely in connection with preclinical activities necessary to prepare COYA 302 for its initial IND filing and launch of a Phase 2 clinical trial.

Current wording

Research and development expenses decreased by $1.1 million from $5.2 million for the three months ended March 31, 2025 to $4.1 million for the three months ended March 31, 2026. The decrease was primarily due to a $1.2 million decrease in external preclinical and clinical product candidates, reflecting the timing of preclinical activities undertaken in early 2025 to support our IND applications for COYA 302 in ALS. The decrease was further driven by a $0.1 million decrease in sponsored research expense, partially offset by a $0.2 million increase in internal research and development expenses. For our clinical product candidate (COYA 302), we track our external research and development expenses on a candidate-by-candidate basis. Coincident with FDA's approval of our IND of COYA 302 in patients with ALS and FTD, we characterized expenses related to COYA 302 for ALS and FTD as clinical product candidate expenses. Prior to IND approval, all expenses associated with COYA 302 for ALS and FTD were included among the preclinical product candidate expenses captioned as COYA 300 Series. For our preclinical product candidates, we track our external research and development expenses by Series. External research and development expenses include fees paid to CROs and CMOs and fees paid to regulatory, clinical trial and manufacturing professional service firms largely in connection with preclinical activities necessary to prepare COYA 302 for its initial IND filing and launch of a Phase 2 clinical trial.

Previous wording

Other income decreased by $0.2 million from the nine months ended September 30, 2024 compared to the nine months ended September 30, 2025. The decrease was primarily due to a decline in interest and dividend income earned on cash balances.

Current wording

Other income increased by $0.1 million from the three months ended March 31, 2025 compared to the three months ended March 31, 2026. The increase was primarily due to an increase in interest income earned on cash balances.

Previous wording

Since our inception, we have incurred operating losses from our operations through 2025. We have not yet commercialized any product and we do not expect to generate revenue from sales of any products for several years, if at all. Since our inception through September 30, 2025, we have funded our operations through the public and private sale of our equity securities, and payments from Dr. Reddy's in accordance with the DRL Development Agreement. As of September 30, 2025, we had $28.1 million in cash and cash equivalents and had an accumulated deficit of $56.3 million. We expect our existing cash and cash equivalents, together with the $23.0 million in gross proceeds from the Offering, to enable us to fund our operating expenses and capital expenditure requirements for at least one year after the financial statements are issued. We have based these estimates on assumptions that may prove to be imprecise, and we could utilize our available capital resources sooner than we expect.

Current wording

Since our inception, we have incurred operating losses from our operations through March 31, 2026. We have not yet commercialized any product and we do not expect to generate revenue from sales of any products for several years, if at all. Since our inception through March 31, 2026, we have funded our operations through the public and private sale of our equity securities, and payments from Dr. Reddy's in accordance with the DRL Development Agreement. As of March 31, 2026, we had $50.7 million in cash and cash equivalents and had an accumulated deficit of $69.2 million. We expect our existing cash and cash equivalents to enable us to fund our operating expenses and capital expenditure requirements into the second half of 2027. We have based these estimates on assumptions that may prove to be imprecise, and we could utilize our available capital resources sooner than we expect. Our total future capital requirements will depend on many factors and is subject to the risks and uncertainties set forth in the section titled “Risk Factors.”

Previous wording

Until such time, if ever, as we can generate substantial product revenue, we expect to finance our operations through a combination of equity offerings, debt financings, collaborations, strategic alliances and marketing, distribution or licensing arrangements. To the extent that we raise additional capital through the sale of equity or convertible debt securities, ownership interests in our common stock will be diluted, and the terms of these securities may include liquidation or other preferences that adversely affect the rights of our common stockholders. Debt financing and preferred equity financing, if available, may involve agreements that include covenants limiting or restricting our ability to take specific actions, such as incurring additional debt, making acquisitions or capital expenditures or declaring dividends. If we raise additional funds through collaborations, strategic alliances or marketing, distribution or licensing arrangements with third parties, we may have to relinquish valuable rights to our technologies, future revenue streams, research programs or product candidates, or grant licenses on terms that may not be favorable to us. Our ability to raise additional capital may be adversely impacted by potential worsening of global economic conditions, potential future global pandemics or health crises, and the recent disruptions to, and volatility in, the credit, banking and financial markets in the United States. If we are unable to raise additional funds through equity or debt financings or other arrangements when needed, we may be required to delay, limit, reduce or terminate our research, product development or future commercialization efforts, or grant rights to develop and market product candidates that we would otherwise prefer to develop and market ourselves.

Current wording

Until such time, if ever, as we can generate substantial product revenue, we expect to finance our operations through a combination of equity offerings, debt financings, collaborations, strategic alliances and marketing, distribution or licensing arrangements. To the extent that we raise additional capital through the sale of equity or convertible debt securities, your ownership interest will be diluted, and the terms of these securities may include liquidation or other preferences that adversely affect your rights as a common stockholder. Debt financing and preferred equity financing, if available, may involve agreements that include covenants limiting or restricting our ability to take specific actions, such as incurring additional debt, making acquisitions or capital expenditures or declaring dividends. If we raise additional funds through collaborations, strategic alliances or marketing, distribution or licensing arrangements with third parties, we may have to relinquish valuable rights to our technologies, future revenue streams, research programs or product candidates, or grant licenses on terms that may not be favorable to us. Our ability to raise additional capital may be adversely impacted by potential worsening of global economic conditions, potential future global pandemics or health crises, and the recent disruptions to, and volatility in, the credit, banking and financial markets in the United States. If we are unable to raise additional funds through equity or debt financings or other arrangements when needed, we may be required to delay, limit, reduce or terminate our research, product development or future commercialization efforts, or grant rights to develop and market product candidates that we would otherwise prefer to develop and market ourselves.

Previous wording

During the nine months ended September 30, 2024, we used $7.9 million of cash in operating activities. Cash used in operating activities reflected our net loss of $12.0 million, partially offset by a $2.2 million net increase from our operating assets and liabilities and noncash charges of $1.9 million primarily related to stock-based compensation. The net increase in our operating assets was mainly related to the receipt of a $7.5 million payment from Dr. Reddy's pursuant to the DRL Development Agreement during the nine months ended September 30, 2024.

Current wording

During the three months ended March 31, 2026, we used $6.2 million of cash in operating activities. Cash used in operating activities reflected our net loss of $7.2 million, a $1.2 million change in operating assets and liabilities, partially offset by noncash charges of $2.2 million primarily related to stock-based compensation..

Previous wording

During the nine months ended September 30, 2025, we used $9.7 million of cash in operating activities. Cash used in operating activities reflected our net loss of $15.5 million, partially offset by a $2.1 million change in operating assets and liabilities and noncash charges of $3.7 million primarily related to stock-based compensation.

Current wording

During the three months ended March 31, 2025, we used $2.8 million of cash in operating activities. Cash used in operating activities reflected our net loss of $7.3 million, partially offset by a $3.4 million change in operating assets and liabilities and noncash charges of $1.1 million primarily related to stock-based compensation.

Previous wording

During the nine months ended September 30, 2025, financing activities were immaterial.

Current wording

During the three months ended March 31, 2025, financing activities were immaterial.

Previous wording

Pursuant to the DRL Development Agreement, we received an up-front, nonrefundable payment of $7.5 million in January 2024. Additionally, we are entitled to receive (i) an additional $4.2 million upon FDA acceptance of an IND application for COYA 302 for the treatment of ALS and (ii) an additional $4.2 million payment upon the dosing of the first patient in the first phase 2 clinical trial for COYA 302 for the treatment of ALS in the United States. The DRL Development Agreement also calls for up to an aggregate of $40.0 million in development milestones and up to an aggregate of $677.3 million in sales milestones, related to the New Territories, should all such development and sales milestones be achieved. We will also be owed royalties by Dr. Reddy's on Net Sales (as defined in the DRL Development Agreement) of COYA 302 in the low to mid-teens (prior to paying royalties due pursuant to previously disclosed license agreements related to COYA 302). In June 2024, we entered into the First Amendment to the DRL Development Agreement, or the First Amendment, with Dr. Reddy's, pursuant to which, among other things, Dr. Reddy's paid us a one-time payment of $3.9 million and, in return, Dr. Reddy's will have no obligation to pay the first $6.0 million in royalty payments that would have otherwise been payable to us under the DRL Development Agreement. Pursuant to the First Amendment, as discussed above, the first $6.0 million of royalty payments will not be owed to us.

Current wording

Pursuant to the DRL Development Agreement, we received an up-front, nonrefundable payment of $7.5 million in January 2024. Additionally, we received (i) an additional $4.2 million upon FDA acceptance of an IND application for COYA 302 for the treatment of ALS in August 2025 and (ii) an additional $4.2 million payment upon the dosing of the first patient in the first phase 2 clinical trial for COYA 302 for the treatment of ALS in the United States in December 2025. The DRL Development Agreement also calls for up to an aggregate of $40.0 million in development milestones and up to an aggregate of $677.3 million in sales milestones, related to the New Territories, should all such development and sales milestones be achieved. We will also be owed royalties by Dr. Reddy's on Net Sales (as defined in the DRL Development Agreement) of COYA 302 in the low to mid-teens (prior to paying royalties due pursuant to previously disclosed license agreements related to COYA 302). In June 2024, we entered into the First Amendment to the DRL Development Agreement, or the First Amendment, with Dr. Reddy's, pursuant to which, among other things, Dr. Reddy's paid us a one-time payment of $3.9 million and, in return, Dr. Reddy's will have no obligation to pay the first $6.0 million in royalty payments that would have otherwise been payable to us under the DRL Development Agreement. Pursuant to the First Amendment, as discussed above, the first $6.0 million of royalty payments will not be owed to us.

Previous wording

In addition to the equity issuance and reimbursement of patent related expenses, we agreed to make contingent milestone payments to Methodist on a Licensed Product-by-Licensed Product or Licensed Service-by-Licensed Service basis upon the achievement of certain development, approval and sales milestones (i) related to the treatment of ALS totaling up to $0.3 million in the aggregate, and (ii) related to the treatment of each other indication (that is not ALS) totaling between $0.2 million and up to $0.4 million in the aggregate per indication. We are also required to pay Methodist, on a licensed product-by-licensed product and country-by-country basis, royalties (subject to customary reductions) equal to 1% to 10% of annual worldwide net sales of such licensed product during a defined royalty term. The applicable royalty percentage increases as Licensed Products are used to treat from one to more than three indications and if a given Licensed Product utilizes only T-reg cell therapy or is a combination of both T-reg cell therapy and exosomes. Therefore, the lowest tier is paid when there is only a single indication being addressed with a single product. The highest tier is paid only on combination products where there are three or more indications being served. We are also required to pay a low single digit percentage for certain licensed services. We are required to pay royalties at between 10%-20% of sublicense revenue. Effective January 1, 2025, the minimum amount which will be owed by us once commercialization occurs is $0.1 million annually.

Current wording

In addition to the equity issuance and reimbursement of patent related expenses, we agreed to make contingent milestone payments to Methodist on a Licensed Product-by-Licensed Product or Licensed Service-by-Licensed Service basis upon the achievement of certain development, approval and sales milestones (i) related to the treatment of ALS totaling up to $0.3 million in the aggregate, and (ii) related to the treatment of each other indication (that is not ALS) totaling between $0.2 million and up to $0.4 million in the aggregate per indication. We are also required to pay Methodist, on a licensed product-by-licensed product and country-by-country basis, royalties (subject to customary reductions) equal to 1% to 10% of annual worldwide net sales of such licensed product during a defined royalty term. The applicable royalty percentage increases as Licensed Products are used to treat from one to more than three indications and if a given Licensed Product utilizes only T-reg cell therapy or is a combination of both T-reg cell therapy and exosomes. Therefore, the lowest tier is paid when there is only a single indication being addressed with a single product. The highest tier is paid only on combination products where there are three or more indications being served. We are also required to pay a low single digit percentage for certain licensed services. We are required to pay royalties at between 10%-20% of sublicense revenue. Effective as of January 2025, the minimum amount which will be owed by us once commercialization occurs is $0.1 million annually.

Previous wording

In August 2022, we entered into the ARS License Agreement with ARS pursuant to which ARS granted us an option to, if we choose to exercise such option, to acquire an exclusive, royalty-bearing license for two patents regarding certain formulations of IL-2 (the product that serves as the basis for COYA 301), with the right to grant sublicenses through multiple tiers under these patents. In consideration for the ARS Option, we paid ARS a one-time, non-refundable, non-creditable option fee of $0.1 million.

Current wording

In 2022, we entered into the ARS License Agreement with ARS pursuant to which ARS granted us an option, which was exercised in December 2022, to acquire an exclusive, royalty-bearing license for two patents, with the right to grant sublicenses through multiple tiers under the ARS Option.

Previous wording

In addition, we may also owe tiered payments to ARS based on our achievement of certain developmental milestones. Under the ARS License Agreement, we will pay an aggregate of $13.3 million in developmental milestone payments for the first Combination Product (as defined in the ARS License Agreement) in a new indication. We will then pay an aggregate of $11.6 million in developmental milestone payments for each Combination Product in each subsequent new indication. Further, for the first Mono Product (as defined in the ARS License Agreement), we will pay an aggregate of $11.8 million in developmental milestone payments. We will then pay an aggregate of $5.9 million in developmental milestone payments for each Mono Product in each subsequent new indication, and we will owe an aggregate of $5.9 million if all developmental milestones are achieved for each new indication. We will also owe royalties on net sales of licensed products ranging from low to mid-single digit percentages. In the event we sublicense our rights under the ARS License Agreement, we will owe royalties on sublicense income within the range of 10% to 20%. To date, the $0.1 million option fee and the mid-six-figure up-front fee (upon exercise of the ARS Option) are the only payments made to ARS under the ARS License Agreement. During the three and nine months ended September 30, 2025, we paid a $0.3 million milestone to ARS in connection with the IND Milestone.

Current wording

We may owe tiered payments to ARS based on its achievement of certain developmental milestones. Under the ARS License Agreement, the Company will pay an aggregate of $13.3 million in developmental milestone payments for the first Combination Product (as defined in the ARS License Agreement) in a new indication. We will then pay an aggregate of $11.6 million in developmental milestone payments for each Combination Product in each subsequent new indication. Further, for the first Mono Product (as defined In the ARS License Agreement) we will pay an aggregate of $11.8 million in developmental milestone payments. We will then pay an aggregate of $5.9 million in developmental milestone payments for each Mono Product in each subsequent new indication, and an aggregate of $5.9 million if all developmental milestones are achieved for each new indication. We will also owe royalties on net sales of licensed products ranging from low to mid-single digit percentages. In the event we sublicenses its rights under the ARS License Agreement, we will owe royalties on sublicense income within the range of 10% to 20%.

Previous wording

In March 2023, we entered into the DRL Agreement with DRL. The DRL Agreement became effective on April 1, 2023. Pursuant to the terms of the DRL Agreement, we will in-license DRL_AB to be used in the development and commercialization of COYA 302 in the U.S., Canada, Mexico, South America, the European Union, the United Kingdom, and Japan. In consideration for the license, we paid a one-time, non-refundable upfront fee of $0.4 million. We will pay to DRL up to an aggregate of approximately $2.9 million of pre-approval regulatory milestone payments for the first indication in the Field (as defined in the DRL Agreement) and an additional approximately $20.0 million if all other development, regulatory approval and sales milestones are incurred under the DRL Agreement. We will also pay to DRL a low-six figure milestone payment per additional indication. Further, pursuant to the DRL Agreement, we will pay to DRL single-digit royalties on Net Sales (as defined in the DRL Agreement). During the three and nine months ended September 30, 2025, we paid a $0.3 million milestone to DRL in connection with the IND Milestone.

Current wording

In 2023, we entered into an exclusive DRL Agreement with DRL which allowed us to in-license DRL’s abatacept biosimilar for use in the development of COYA 302. COYA 302 is a dual biologic intended to suppress neuroinflammation via multiple immunomodulatory pathways, for the treatment of neurodegenerative conditions. The DRL Agreement also provides for the license of COYA 301 to DRL to permit the commercialization by DRL of COYA 302 in territories not otherwise granted to Coya. In consideration for the license we have paid a non-refundable upfront fee of $0.4 million. We will pay to DRL up to an aggregate of approximately $2.9 million of pre-approval regulatory milestone payments for the first indication in the Field (as defined in the DRL Agreement), and an additional approximately $20.0 million if all other development, regulatory approval and sales milestones are incurred under the DRL Agreement. We will also pay to DRL a low-six figure milestone payment per additional indication. Further, pursuant to the DRL Agreement, we will pay to DRL single-digit royalties on Net Sales (as defined in the DRL Agreement). As of March 31, 2026, we owed DRL $0.3 million in milestone payments in connection with the FDA's approval of our IND of COYA 302 in patients with FTD.
Rearranged previous paragraphs (3)

Previous report — wording carried elsewhere

Research and development expenses increased by $0.7 million from $2.2 million for the three months ended September 30, 2024 to $2.9 million for the three months ended September 30, 2025. The increase was due to a $0.4 million increase in our preclinical and clinical expenses due to our clinical advancement of COYA 302 in ALS and a $0.3 million increase in internal research and development expenses. For our clinical product candidates, we track our external research and development expenses on a candidate-by-candidate basis. Coincident with FDA's approval of our IND of COYA 302 in patients with ALS, in the third quarter of 2025, we characterized expenses related to COYA 302 for ALS as clinical product candidate expenses. Prior to the third quarter of 2025, all expenses associated with COYA 302 for ALS were included among the preclinical product candidate expenses captioned as COYA 300 Series. For our preclinical product candidates, we track our external research and development expenses by Series. External research and development expenses include fees paid to CROs and CMOs and fees paid to regulatory, clinical trial and manufacturing professional service firms largely in connection with preclinical activities necessary to prepare COYA 302 for its initial IND filing and launch of a Phase 2 clinical trial.

Previous report — wording carried elsewhere

We do not further classify or evaluate our internal research and development expenses by product candidate or by Series as these expenses primarily relate to compensation, materials and supplies, and other costs which are deployed across multiple therapeutic modalities, multiple product candidates, and multiple therapeutic areas under development.

Previous report — wording carried elsewhere

Research and development expenses disaggregated and classified by preclinical, and external and internal expenses are summarized in the table below: