# EDGAR Filing Document

**Accession Number:** 0001285819
**File Stem:** 0001437749-25-034826
**Filing Date:** 2025-11
**Character Count:** 181840
**Document Hash:** aa4024d5f0d2f8f12b771f9d2c887920
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001437749-25-034826.hdr.sgml**: 20251113

**ACCESSION NUMBER**: 0001437749-25-034826

**CONFORMED SUBMISSION TYPE**: 10-Q

**PUBLIC DOCUMENT COUNT**: 79

**CONFORMED PERIOD OF REPORT**: 20250930

**FILED AS OF DATE**: 20251113

**DATE AS OF CHANGE**: 20251113

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** OMEROS CORP
- **CENTRAL INDEX KEY:** 0001285819
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 911663741
- **STATE OF INCORPORATION:** WA
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 10-Q
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-34475
- **FILM NUMBER:** 251478566

**BUSINESS ADDRESS:**
- **STREET 1:** 201 ELLIOTT AVENUE WEST
- **CITY:** SEATTLE
- **STATE:** WA
- **ZIP:** 98119
- **BUSINESS PHONE:** 206-676-5000

**MAIL ADDRESS:**
- **STREET 1:** 201 ELLIOTT AVENUE WEST
- **CITY:** SEATTLE
- **STATE:** WA
- **ZIP:** 98119

?xml version='1.0' encoding='ASCII'? omer20250930_10q.htm

[**Table of Contents**](#toc)

------

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

------

**FORM 10-Q**

------

**(Mark One)**

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

**For the quarterly period ended September 30, 2025**

**or**

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

**For the transition period from to** 

**Commission file number: 001-34475**

------

## OMEROS CORPORATION
**(Exact name of registrant as specified in its charter)**

------

---

| | |
|:---|:---|
| **Washington** | **91-1663741** |
| **(State or other jurisdiction of**<br> **incorporation or organization)** | **(I.R.S. Employer**<br> **Identification Number)** |
| **201 Elliott Avenue West**<br> **Seattle, Washington** | **98119** |
| **(Address of principal executive offices)** | **(Zip Code)** |
| **(206) 676-5000**<br> **(Registrant**'**s telephone number, including area code)** | **(206) 676-5000**<br> **(Registrant**'**s telephone number, including area code)** |

---

---

| | | |
|:---|:---|:---|
| **Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934:** | **Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934:** | **Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934:** |
| **(Title of each class)** | **(Trading symbol)** | **(Name of each exchange on which registered)** |
| **Common Stock, par value $0.01 per share** | **OMER** | **The Nasdaq Stock Market LLC** |

---

------

[**Table of Contents**](#toc)

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

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

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or 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 is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒

As of November 12, 2025, the number of outstanding shares of the registrant's common stock, par value $0.01 per share, was 70,900,459.

------

[**Table of Contents**](#toc)

**SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS** 

● our estimates of future operating expenses and projections regarding how long our existing cash, cash equivalents and short-term investments will fund our anticipated operating expenses, capital expenditures, and debt service obligations;

● our ability to raise additional capital through the capital markets or one or more future equity offerings, debt financings, industry collaborations, licensing arrangements, asset sales, or other means;

● our ability to comply with the terms of our secured credit facility and our expectations regarding the effect on our operations of compliance with the restrictive covenants and other obligations applicable under our secured credit facility;

● our expectations regarding anticipated or potential paths to regulatory approval of narsoplimab by the U.S. Food and Drug Administration ("FDA") and/or the European Medicines Agency ("EMA"), including whether FDA will meet the target date for action assigned to the biologics license application ("BLA") for narsoplimab in hematopoietic stem cell transplant-associated thrombotic microangiopathy ("TA-TMA"), whether a decision on our marketing authorization application ("MAA") for narsoplimab in TA-TMA will be issued within the expected timeframe, and whether FDA, EMA or any other regulatory authority will ultimately grant approval for narsoplimab in TA-TMA or in any other indication;

● our expectation that our contract manufacturer will manufacture narsoplimab when needed to support any regulatory inspection, if required by FDA in connection with or following its review of our BLA for narsoplimab in TA-TMA and, if approved, to support commercial sale of narsoplimab;

● our plans for the commercial launch of narsoplimab following any regulatory approval and our estimates and expectations regarding coverage and reimbursement for any approved products;

● our expectations regarding the closing of the transactions contemplated by the Asset Purchase and License Agreement, by and between Omeros Corporation and Novo Nordisk Health Care AG (the "APLA");

● our expectations regarding amounts potentially payable to us under the APLA;

● our expectations regarding plans for development of zaltenibart and other products under the APLA;

● our expectations regarding amounts potentially payable to us based on sales of our former commercial ophthalmology product OMIDRIA<sup>®</sup>;

● our expectations regarding the clinical, therapeutic, and competitive benefits and importance of our product candidates, including narsoplimab and zaltenibart;

● our ability to design, initiate and/or successfully complete clinical trials and other studies for our product candidates and our plans and expectations regarding our ongoing or planned clinical trials;

● our expectations regarding: our ability to recruit and enroll patients in any ongoing or planned clinical trial; whether we can capitalize on the financial and regulatory incentives provided by orphan drug designations granted by FDA, the European Commission, or EMA; and whether we can utilize the opportunities for expedited development and review that may be provided by fast-track or breakthrough therapy designations granted by FDA;

● our expectations about the commercial competition that our product candidates, if commercialized, face or may face;

------

[**Table of Contents**](#toc)

● our involvement in existing or potential claims, legal proceedings, and administrative actions, and the merits, potential outcomes and effects of both existing and potential claims, legal proceedings, and administrative actions, as well as regulatory determinations, on our business, prospects, financial condition, and results of operations;

● the extent of protection that our patents provide and that our pending patent applications will provide, if patents are issued from such applications, for our technologies, programs, and product candidates;

● estimated costs that we expect to incur and cost savings that we expect to realize in connection with cost limitation measures;

● our ability to consummate licensing, partnering or other transactions and the benefits, if any, we would receive from any such transactions;

● the factors on which we base our estimates for accounting purposes and our expectations regarding the effect of changes in accounting guidance or standards on our operating results; and

● our expected financial position, performance, revenues, growth, costs and expenses, magnitude of net losses, and the availability of resources.

Our actual results could differ materially from those anticipated in these forward-looking statements for many reasons, including the risks, uncertainties and other factors described in this Quarterly Report on Form 10-Q under the headings "Risk Factors" and "Management's Discussion and Analysis of Financial Condition and Results of Operations" and in our other filings with the U.S. Securities and Exchange Commission (the "SEC"). Given these risks, uncertainties and other factors, actual results or anticipated developments may not be realized or, even if substantially realized, may not have the expected consequences to or effects on our company, business or operations. Accordingly, you should not place undue reliance on these forward-looking statements, which represent our estimates and assumptions only as of the date of the filing of this Quarterly Report on Form 10-Q. You should read this Quarterly Report on Form 10-Q completely and with the understanding that our actual results in subsequent periods may differ materially from current expectations. Except as required by applicable law, we assume no obligation to update or revise any forward-looking statements contained herein, whether as a result of any new information, future events or otherwise.

------

[**Table of Contents**](#toc)

**OMEROS CORPORATION**

**FORM 10-Q FOR THE QUARTER ENDED September 30, 2025**

**INDEX** 

---

| | | |
|:---|:---|:---|
|  |  | **Page** |
| [**Part I** — **Financial Information**](#partonefininfo) | [**Part I** — **Financial Information**](#partonefininfo) | [5](#partonefininfo) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; [Item 1.](#finstmts) | [Financial Statements (unaudited)](#finstmts) | [5](#finstmts) |
|  | [Condensed Consolidated Balance Sheets](#bs) | [5](#bs) |
|  | [Condensed Consolidated Statements of Operations and Comprehensive Loss](#ops) | [6](#ops) |
|  | [Condensed Consolidated Statements of Stockholders' Equity (Deficit)](#se) | [7](#se) |
|  | [Condensed Consolidated Statements of Cash Flows](#cf) | [8](#cf) |
|  | [Notes to Condensed Consolidated Financial Statements](#notes) | [9](#notes) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; [Item 2.](#mda) | [Management's Discussion and Analysis of Financial Condition and Results of Operations](#mda) | [16](#mda) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; [Item 3.](#quant) | [Quantitative and Qualitative Disclosures About Market Risk](#quant) | [23](#quant) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; [Item 4.](#controls) | [Controls and Procedures](#controls) | [23](#controls) |
| [**Part II** — **Other Information**](#parttwootherinfo) | [**Part II** — **Other Information**](#parttwootherinfo) | [24](#parttwootherinfo) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; [Item 1.](#legal) | [Legal Proceedings](#legal) | [24](#legal) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; [Item 1A.](#risk) | [Risk Factors](#risk) | [24](#risk) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; [Item 2.](#unregistered) | [Unregistered Sales of Equity Securities and Use of Proceeds](#unregistered) | [24](#unregistered) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; [Item 3.](#defaults) | [Default Upon Senior Securities](#defaults) | [24](#defaults) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; [Item 4.](#mine) | [Mine Safety Disclosures](#mine) | [24](#mine) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; [Item 5.](#otherinfo) | [Other Information](#otherinfo) | [24](#otherinfo) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; [Item 6.](#exhibits) | [Exhibits](#exhibits) | [25](#exhibits) |
| [**Signatures**](#sigs) | [**Signatures**](#sigs) | [26](#sigs) |

---

------

[**Table of Contents**](#toc)

**PART I** — **FINANCIAL INFORMATION**

**ITEM 1. FINANCIAL STATEMENTS**

**OMEROS CORPORATION**

**CONDENSED CONSOLIDATED BALANCE SHEETS**

**(In thousands, except share and per share data)** 

**(unaudited)**

---

| | | |
|:---|:---|:---|
|  | **September 30,** | **December 31,** |
|  | **2025** | **2024** |
| **Assets** |  |  |
| Current assets: |  |  |
| Cash and cash equivalents | $2395 | $3400 |
| Short-term investments | 33690 | 86732 |
| OMIDRIA contract royalty asset | 25052 | 29083 |
| Receivables | 6908 | 7739 |
| Prepaid expense and other assets | 3760 | 7166 |
| Total current assets | 71805 | 134120 |
| OMIDRIA contract royalty asset, non-current | 99031 | 124266 |
| Right of use assets | 11807 | 14961 |
| Property and equipment, net | 2009 | 2678 |
| Restricted investments | 1054 | 1054 |
| **Total assets** | $185706 | $277079 |
| **Liabilities and shareholders' deficit** |  |  |
| Current liabilities: |  |  |
| Accounts payable | $12499 | $5905 |
| Accrued expenses | 25745 | 26005 |
| OMIDRIA royalty obligation | 19301 | 20645 |
| &nbsp;&nbsp;&nbsp; Convertible senior notes, net | 17036 |  |
| &nbsp;&nbsp;&nbsp; Term debt |  | 21000 |
| Lease liabilities | 6175 | 5971 |
| Total current liabilities | 80756 | 79526 |
| OMIDRIA royalty obligation, non-current | 152529 | 195612 |
| Convertible senior notes, non-current, net | 72075 | 97178 |
| Term debt, non-current, net | 87480 | 69405 |
| Lease liabilities, non-current | 8843 | 13466 |
| Other accrued liabilities, non-current | 4501 | 4501 |
| Commitments and contingencies (Note 10) |  |  |
| Shareholders' deficit: |  |  |
| Preferred stock, par value $0.01 per share, 20,000,000 shares authorized; none issued and outstanding at September 30, 2025 and December 31, 2024. |  |  |
| Common stock, par value $0.01 per share, 150,000,000 shares authorized at September 30, 2025 and December 31, 2024; 70,073,622 and 58,044,465 shares issued and outstanding at September 30, 2025 and December 31, 2024, respectively. | 700 | 580 |
| Additional paid-in capital | 778968 | 727156 |
| Accumulated deficit | (1000146) | (910345) |
| Total shareholders' deficit | (220478) | (182609) |
| **Total liabilities and shareholders' deficit** | $185706 | $277079 |

---

See accompanying Notes to Condensed Consolidated Financial Statements

------

[**Table of Contents**](#toc)

**OMEROS CORPORATION**

**CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS**

**(In thousands, except share and per share data)**

**(unaudited)** 

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **Three Months Ended**  | **Three Months Ended**  | **Nine Months Ended** | **Nine Months Ended** |
|  | **September 30,** | **September 30,** | **September 30,** | **September 30,** |
|  | **2025** | **2024** | **2025** | **2024** |
| Costs and expenses: |  |  |  |  |
| Research and development | $15995 | $24084 | $61850 | $96203 |
| Selling, general and administrative | 10397 | 11323 | 31865 | 37395 |
| Total costs and expenses | 26392 | 35407 | 93715 | 133598 |
| Loss from operations | (26392) | (35407) | (93715) | (133598) |
| Interest expense, net of remeasurement adjustments and other | 13355 | (4052) | 9686 | (21498) |
| Interest and other income | 616 | 2346 | 2979 | 9008 |
| Loss on early extinguishment of 2026 Notes |  |  | (2968) |  |
| Net loss on change in fair value of financial instruments | (8822) |  | (680) |  |
| Net loss from continuing operations | (21243) | (37113) | (84698) | (146088) |
| Net income (loss) from discontinued operations, net of tax | (9674) | 4881 | (5103) | 20631 |
| Net loss | $(30917) | $(32232) | $(89801) | $(125457) |
| Basic net income (loss) per share: |  |  |  |  |
| Net loss from continuing operations | $(0.32) | $(0.64) | $(1.39) | $(2.51) |
| Net income (loss) from discontinued operations | (0.15) | 0.08 | (0.08) | 0.36 |
| Net loss | $(0.47) | $(0.56) | $(1.47) | $(2.15) |
| Weighted-average shares used to compute basic net income (loss) per share | 66263992 | 57948093 | 61049886 | 58232007 |

---

See accompanying Notes to Condensed Consolidated Financial Statements

------

[**Table of Contents**](#toc)

**OMEROS CORPORATION**

**CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS**' **DEFICIT**

**(In thousands, except share data)**

**(unaudited)** 

---

| | | | | | |
|:---|:---|:---|:---|:---|:---|
|  |  |  | **Additional** |  |  |
|  | **Common Stock** | **Common Stock** | **Paid-In** | **Accumulated** |  |
|  | **Shares** | **Amount** | **Capital** | **Deficit** | **Total** |
| **Balance at January 1, 2025** | 58044465 | $580 | $727156 | $(910345) | $(182609) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Issuance of common stock upon exercise of stock options | 19436 |  | 63 |  | 63 |
| &nbsp;&nbsp;&nbsp; Stock-based compensation expense |  |  | 2453 |  | 2453 |
| &nbsp;&nbsp;&nbsp; Net loss |  |  |  | (33460) | (33460) |
| **Balance at March 31, 2025** | 58063901 | 580 | 729672 | (943805) | (213553) |
| &nbsp;&nbsp;&nbsp; Issuance of common stock - at-the-market equity offering facility, net | 1411845 | 13 | 6274 |  | 6287 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Issuance of common stock - 2026 Notes equitization | 539320 | 6 | 1909 |  | 1915 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Issuance of common stock upon exercise of stock options | 7266 |  | 25 |  | 25 |
| Stock-based compensation expense |  |  | 2065 |  | 2065 |
| &nbsp;&nbsp;&nbsp; Net loss |  |  |  | (25424) | (25424) |
| **Balance at June 30, 2025** | 60022332 | 599 | 739945 | (969229) | (228685) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Issuance of common stock - registered direct offering | 5365853 | 54 | 20273 |  | 20327 |
| &nbsp;&nbsp;&nbsp; Issuance of common stock - at-the-market equity offering facility, net | 2327209 | 23 | 8980 |  | 9003 |
| &nbsp;&nbsp;&nbsp; Issuance of common stock - 2026 Notes equitization | 2280546 | 24 | 7604 |  | 7628 |
| &nbsp;&nbsp;&nbsp; Issuance of common stock upon exercise of stock options | 77682 | 1 | 224 |  | 225 |
| &nbsp;&nbsp;&nbsp; Stock-based compensation expense |  |  | 1941 |  | 1941 |
| &nbsp;&nbsp;&nbsp; Net loss |  |  |  | (30917) | (30917) |
| **Balance at September 30, 2025** | 70073622 | $701 | $778967 | $(1000146) | $(220478) |
| **Balance at January 1, 2024** | 61128597 | $611 | $727936 | $(753530) | $(24983) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Issuance of common stock upon exercise of stock options | 9339 |  | 32 |  | 32 |
| &nbsp;&nbsp;&nbsp; Repurchases of common stock | (3195241) | (32) | (11819) |  | (11851) |
| &nbsp;&nbsp;&nbsp; Stock-based compensation expense |  |  | 2658 |  | 2658 |
| &nbsp;&nbsp;&nbsp; Net loss |  |  |  | (37184) | (37184) |
| **Balance at March 31, 2024** | 57942695 | 579 | 718807 | (790714) | (71328) |
| &nbsp;&nbsp;&nbsp; Issuance of common stock upon exercise of stock options | 1464 |  | 3 |  | 3 |
| Stock-based compensation expense |  |  | 2768 |  | 2768 |
| Net loss |  |  |  | (56041) | (56041) |
| **Balance at June 30, 2024** | 57944159 | 579 | 721578 | (846755) | (124598) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Issuance of common stock upon exercise of stock options | 5601 |  | 17 |  | 17 |
| &nbsp;&nbsp;&nbsp; Stock-based compensation expense |  |  | 2641 |  | 2641 |
| &nbsp;&nbsp;&nbsp; Net loss |  |  |  | (32232) | (32232) |
| **Balance at September 30, 2024** | 57949760 | $579 | $724236 | $(878987) | $(154172) |

---

See accompanying Notes to Condensed Consolidated Financial Statements

------

[**Table of Contents**](#toc)

**OMEROS CORPORATION**

**CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS**

**(In thousands)**

**(unaudited)**

---

| | | |
|:---|:---|:---|
|  | **Nine Months Ended September 30,** | **Nine Months Ended September 30,** |
|  | **2025** | **2024** |
| Operating activities: |  |  |
| Net loss | $(89801) | $(125457) |
| Adjustments to reconcile net loss to net cash used in operating activities: |  |  |
| Stock-based compensation expense | 6459 | 8067 |
| Loss on early extinguishment of 2026 Notes | 2968 |  |
| Amortization of discount and issuance costs on convertible notes | 2466 | 713 |
| Remeasurement on fair value of financial instruments | 680 |  |
| Depreciation and amortization | 729 | 649 |
| Remeasurement on OMIDRIA royalty obligation | (34171) | (1553) |
| Non-cash interest on OMIDRIA contract royalty asset | (11521) | (12824) |
| Remeasurement of OMIDRIA contract royalty asset | 16383 | (7384) |
| Amortization of premium and issuance costs on term debt | (4727) | 488 |
| Accretion on U.S. government treasury bills, net |  | (4295) |
| Changes in operating assets and liabilities: |  |  |
| OMIDRIA contract royalty asset | 24404 | 29586 |
| Prepaid expenses and other | 2713 | 1702 |
| Receivables | 831 | 1790 |
| Accounts payable and accrued expense | 6335 | (11305) |
| Net cash used in operating activities | (76252) | (119823) |
| Investing activities: |  |  |
| Proceeds from the sale and maturities of investments | 71500 | 969221 |
| Purchases of investments | (18458) | (921819) |
| Purchases of property and equipment | (65) | (139) |
| Net cash provided by investing activities | 52977 | 47263 |
| Financing activities: |  |  |
| Proceeds from registered direct offering, net | 20327 |  |
| Proceeds from issuance of common stock from the ATM facility, net | 15292 |  |
| Proceeds upon exercise of stock options | 313 | 52 |
| Principal payments on OMIDRIA royalty obligation | (10256) | (15125) |
| Payment of debt issuance costs related to 2029 Notes | (2837) |  |
| Payments on finance lease obligations | (569) | (446) |
| Proceeds from sale of future royalties |  | 115525 |
| Cash paid to repurchase 2026 convertible senior notes |  | (21179) |
| Repurchases of common stock |  | (11851) |
| Net cash provided by financing activities | 22270 | 66976 |
| Net decrease in cash and cash equivalents | (1005) | (5584) |
| Cash and cash equivalents at beginning of period | 3400 | 7105 |
| Cash and cash equivalents at end of period | $2395 | $1521 |
| Supplemental cash flow information |  |  |
| Exchange of 2026 Notes for 2029 Notes | $70785 | $— |
| Exchange of 2026 Notes for common stock | 10000 |  |
| Cash paid for interest | 26745 | 28122 |
| &nbsp;&nbsp;&nbsp; Cash paid (received) for income taxes, net | 182 | (109) |
| &nbsp;&nbsp;&nbsp; Equipment acquired under finance lease |  | 509 |

---

See accompanying Notes to Condensed Consolidated Financial Statements

------

[**Table of Contents**](#toc)

**OMEROS CORPORATION**

**NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS**

**(unaudited)** 

**Note 1**—**Organization and Basis of Presentation**

*General*

Omeros Corporation ("Omeros," the "Company" or "we") is a clinical-stage biopharmaceutical company committed to discovering, developing, and commercializing small-molecule and protein therapeutics for large-market as well as orphan indications targeting immunologic diseases, including complement-mediated diseases and cancers related to dysfunction of the immune system, as well as addictive and compulsive disorders.

Our clinical-stage development programs include: zaltenibart, also known as OMS906, our antibody targeting mannan-binding lectin-associated serine protease-3 ("MASP-3"), the key activator of the alternative pathway of complement; narsoplimab, our antibody targeting mannan-binding lectin-associated serine protease 2 ("MASP-2"), the effector enzyme of the lectin pathway of complement; OMS1029, our long-acting antibody targeting MASP-2; and OMS527, our phosphodiesterase 7 ("PDE7") inhibitor program.

On October 10, 2025, we entered into an APLA with Novo Nordisk Health Care AG ("Novo Nordisk"), pursuant to which Novo Nordisk will receive exclusive global rights in all indications to develop and commercialize zaltenibart and certain related monoclonal antibodies and antigen-binding fragments (collectively, the "Compounds"), and related pharmaceutical products ("Products") upon the Closing as defined below. Under the APLA, we agreed to sell and transfer, and Novo Nordisk agreed to purchase and assume, certain assets and liabilities related to the Compounds and Products, and the parties agreed to grant and receive certain intellectual property licenses, as further described below (the "Transaction"). Subject to the satisfaction or waiver of the closing conditions contained in the APLA, the Transaction is expected to close in the fourth quarter of 2025.

Pursuant to the terms and subject to the conditions of the APLA, we are eligible to receive $340.0 million in upfront and near-term milestone payments, of which $240.0 million is to be received by us at the closing of the Transaction (the "Closing"). Beyond the $340.0 million, we can receive (i) an additional $410.0 million in one-time milestone payments upon the first achievement by Novo Nordisk or its affiliates or sublicensees of each of the development and approval milestone events as set forth in the APLA and (ii) up to $1.3 billion in one-time milestone payments upon the first achievement by Novo Nordisk or its affiliates or sublicensees of certain sales-based milestone events as set forth in the APLA. We are also eligible under the APLA to receive tiered royalties on annual net sales of Products at percentage rates ranging from high single digit to high teens, subject to reduction in certain circumstances, as set forth in the APLA.

The Closing is subject to the satisfaction or waiver of certain customary closing conditions, including (i) the absence of any law, order, or governmental proceeding that prohibits or makes illegal the consummation of the Transaction, (ii) the expiration or termination of the applicable waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, (iii) the accuracy of each party's representations and warranties contained in the APLA (subject to customary materiality and other qualifiers), (iv) each party's performance and compliance with its covenants contained in the APLA, (v) the absence of a material adverse effect, and (vi) delivery of certain closing deliverables.

We have substantially completed two Phase 2 clinical trials evaluating zaltenibart in paroxysmal nocturnal hemoglobinuria ("PNH") and have an ongoing open label extension study to assess the long-term efficacy and safety of zaltenibart in PNH patients who have completed either of the two Phase 2 clinical trials. We also have a small, ongoing Phase 2 study evaluating zaltenibart in complement 3 glomerulopathy ("C3G"), a rare and debilitating renal disease driven by complement dysregulation.

We began initiating clinical trial sites in our Phase 3 program for zaltenibart in PNH during the first quarter of 2025; however, based on considerations of capital availability and the anticipated ramp up in spending on those trials, we have determined temporarily to pause our Phase 3 clinical development program for zaltenibart in this indication in order to prioritize the use of our available capital to other programs. Our ongoing and planned clinical programs for zaltenibart will be transitioned to Novo Nordisk following the closing of the Transaction throughout which we will provide certain transition services to Novo Nordisk.

Our pipeline of clinical-stage complement-targeted therapeutic candidates also includes narsoplimab in TA-TMA, which, upon approval, will be marketed as YARTEMLEA. We successfully completed a pivotal clinical trial for narsoplimab in TA-TMA and previously submitted to FDA a BLA seeking marketing approval for narsoplimab in this indication. In October 2021, FDA issued a complete response letter ("CRL") with respect to the original BLA and indicated that additional information would be needed to support regulatory approval. We appealed FDA's decision to issue the CRL through a formal dispute resolution process that concluded in late 2022. Although our appeal was denied, the decision identified potential paths for resubmission of the BLA, including paths based on comparison of survival data from the completed pivotal trial to a historical control group. Based on the recommendations included in the appeal decision and on subsequent interactions with FDA's review division, we developed a statistical analysis plan to assess data from our pivotal clinical trial, existing data from a historical control population available from an external source, and data from the narsoplimab expanded access program.

In March 2025, we resubmitted to FDA the BLA seeking regulatory approval for narsoplimab in TA-TMA. The resubmission was accepted for review by FDA as a class 2 resubmission and, pursuant to the Prescription Drug User Fee Act ("PDUFA"), was assigned a target action date for the FDA decision of September 25, 2025. Following the submission of information in response to an information request from FDA, FDA informed us that the PDUFA date has been extended to December 26, 2025. We expect that FDA will meet this PDUFA date. All analyses requested by FDA as part of its review have been consistent with and have provided statistically significant support of narsoplimab's benefit demonstrated in the analyses submitted as part of the BLA resubmission.

In June 2025, we submitted a MAA for narsoplimab for the treatment of TA-TMA in the European Union. The EMA completed validation of the narsoplimab MAA, which confirms that the submission is accepted and starts the formal review process by EMA's Committee for Medicinal Products for Human Use. We expect an opinion on the MAA in mid-2026.

As with any BLA or MAA, there can be no guarantee that FDA or the EMA will complete their respective reviews within a given timeframe, or that our BLA or MAA will ultimately be approved.

Our lectin pathway program also includes OMS1029, our long-acting antibody targeting MASP-2. We have completed Phase 1 clinical trials evaluating both single-ascending and multiple ascending doses of OMS1029. Results of these studies support once-quarterly dosing administered either intravenously or subcutaneously. OMS1029 has been well tolerated to date with no safety concerns identified. Several indications for potential Phase 2 clinical development of OMS1029 have been evaluated/selected and may be pursued pending the availability and allocation of capital. OMS1029 drug product and placebo have been manufactured and stored for future use. Available quantities are expected to be sufficient to support a Phase 2 clinical program.

Our PDE7 inhibitor program, which we refer to as OMS527, comprises multiple PDE7 inhibitor compounds and is based on our discoveries of previously unknown links between PDE7 and any addiction or compulsive disorder, and between PDE7 and any movement disorders. In April 2023, we were awarded a grant from the National Institute on Drug Abuse ("NIDA"), part of the National Institutes of Health, to develop, at NIDA's request, our lead orally administered PDE7 inhibitor compound for the treatment of cocaine use disorder. NIDA awarded the grant to us for a total of $6.2 million over three years, of which we expensed $2.1 million and have claimed and received $1.6 million of funding to date. The grant is intended to support preclinical cocaine interaction/toxicology studies to assess safety of the therapeutic candidate in the presence of concomitant cocaine administration, as well as an in-patient, placebo-controlled clinical study evaluating the safety and efficacy of OMS527 in adult cocaine users who receive concurrent intravenous cocaine. The preclinical studies, designed with NIDA toxicologists, have been successfully completed with no safety findings and provide drug-interaction safety data in support of the planned in-patient human study of OMS527 in cocaine users. FDA has requested that we provide additional preclinical information prior to initiating the clinical in-patient study in cocaine users, which we are targeting for the second half of 2026.

We also have various programs in preclinical research and development.

*Liquidity and Capital Resources*

As of September 30, 2025, we had cash, cash equivalents, and short-term investments of $36.1 million. For the nine months ended September 30, 2025, our cash used in operations was $76.3 million and included a net loss for the nine months ended September 30, 2025 of $89.8 million.

Pursuant to a covenant under that certain Credit and Guarantee Agreement, dated June 3, 2024 (the "Credit Agreement"), among the Company, the various lenders party thereto, and Wilmington Savings Fund Society, FSB, as Administrative Agent and Collateral Agent, we must maintain $25.0 million of unrestricted cash, cash equivalents and short-term investments at all times. We have maintained a balance of unrestricted cash, cash equivalents, and short-term investments greater than $25.0 million and at no time during the nine months ended September 30, 2025 or through the date of issuance of these condensed consolidated financial statements have we been in violation of any of our debt covenants.

------

[**Table of Contents**](#toc)

In recent years, Omeros has incurred net losses from continuing operations and negative cash flows from operations.

The conditions described above, exclusive of any potential future activities, including the anticipated closing of the Transaction with Novo Nordisk or receipt of any related potential milestone payments and/or near-term regulatory approval of narsoplimab, raise substantial doubt with respect to our ability to meet our obligations through one year from the issuance of the Company's condensed consolidated financial statements. Our ability to continue as a going concern will require us to do one or several of the following: generate positive cash flow from operations, enter into strategic alliances, obtain additional financing, and/or sell assets.

The Transaction with Novo Nordisk is expected to close in the fourth quarter of 2025 and would provide us with $240.0 million in upfront cash. A portion of the $240.0 million upfront payment would be applied to the repayment of all outstanding obligations under the Credit Agreement. The repayment would relate to the $67.1 million outstanding term debt (the "Term Loan") under the Credit Agreement, along with related prepayment premiums, expenses and accrued and unpaid interest. Repayment of our obligations under the Credit Agreement would result in the release in full of all liens and covenants thereunder including the covenant requiring us to maintain a minimum of $25.0 million in unrestricted cash, cash equivalents and short-term investments at all times. (See "Note 6 — Debt" for further details).

On July 28, 2025, we issued and sold 5,365,853 shares of our common stock in a registered direct offering to entities managed by Polar Asset Management Partners (collectively, "Polar") at a price of $4.10 per share, representing a 14% premium to the closing price of our common stock on the date of the definitive agreement for the purchase of shares. We received $20.3 million in cash proceeds net of offering expenses.

Further, we have a sales agreement pursuant to an at-the-market ("ATM") equity offering facility through which we may, from time to time, offer and sell shares of our common stock for proceeds of up to an aggregate amount of $150.0 million. During the three and nine months ended September 30, 2025, we received $9.0 million and $15.3 million, respectively, of net proceeds from the sale of our common stock through the ATM facility and have received $3.6 million subsequent to September 30, 2025. (See "Note 11 – Stockholders Deficit").

If the ATM facility is needed but inaccessible, we are not able to close the Transaction, or we are not able to obtain debt and/or royalty-related financing and/or partnering funding in connection with a near-term regulatory approval of narsoplimab, it would have a significant negative impact on our financial condition. For purposes of determining available capital resources, any future royalty and/or milestone receipts are excluded. We have taken steps to manage our operating expenses and reduce our projected cash requirements by delaying clinical trials and reducing selected research and development efforts. Should it be necessary, we may determine to further reduce or delay these or other aspects of our operations and/or implement restructuring activities. Should the need arise to raise further capital for our operations, we may pursue public and private offerings of our equity securities, future royalty sales, or other strategic transactions, which may include licensing or selling a portion or all of one or more of our existing technologies.

*Basis of Presentation*

Our condensed consolidated financial statements include the financial position and results of operations of Omeros and our wholly owned subsidiaries. All inter-company transactions have been eliminated. The accompanying condensed consolidated financial statements reflect all adjustments, consisting of normal recurring adjustments and non-recurring adjustments, considered necessary for the fair presentation of such information. Our financial statements have been prepared in accordance with U.S. generally accepted accounting principles ("GAAP").

These financial statements should be read in conjunction with the audited financial statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2024, from which the December 31, 2024, condensed consolidated balance sheet has been derived.

*Use of Estimates* 

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Significant items subject to such estimates include the OMIDRIA contract royalty asset valuation, the OMIDRIA royalty obligation valuation and our valuation of embedded derivatives. We base our estimates on historical experience and on various other factors that we believe are reasonable under the circumstances; however, actual results could differ from these estimates.

**Note 2**—**Significant Accounting Policies** 

*Segment Reporting*

We operate in one business segment focusing on the research, discovery, development, and commercialization of small-molecule and protein therapeutics targeting immunologic diseases, including complement-mediated diseases and cancers related to dysfunction of the immune system, as well as addictive and compulsive disorders. The Company defines its operating segment based on internally reported financial information that is regularly used by the Chief Operating Decision Maker ("CODM") to analyze performance, make decisions and allocate resources. The Company's CODM is our Chief Executive Officer. For the three and nine months ended September 30, 2025, the Company has identified one operating and reporting segment. The CODM reviews net loss and expenses reported on the condensed consolidated statement of operations and comprehensive income (loss). The measurement of segment assets is reported on the balance sheet as total consolidated assets. All long-lived assets are held in the U.S. Our segment net income (loss) aligns with our condensed consolidated statement of operations and comprehensive income (loss).

*Debt*

<u>2024 Term Loan and Repurchase of 2026 Notes</u>

In June 2024, we performed an assessment of the Credit Agreement and determined that it met the criteria to be accounted for as a troubled debt restructuring. As a result, the $29.3 million difference between the $118.1 million aggregate principal amount of the 2026 Notes (as defined below) repurchased by the Company and the $88.8 million aggregate repurchase price (consisting of the $67.1 million Term Loan and $21.7 million cash on hand) was recorded as a premium (i.e. an increase) to the term debt recorded on our condensed consolidated balance sheet instead of being recognized as a gain on early extinguishment of debt. We amortize the premium as both a reduction of term debt in the condensed consolidated balance sheet and interest expense in the condensed consolidated statement of operations and comprehensive loss over the duration of the Term Loan.

<u>Exchange of 2026 Notes for 2029 Notes and Common Stock</u>

On May 14, 2025, we completed the exchange (the "Convertible Note Exchange") of $70.8 million of our existing 5.25% convertible senior notes due on February 15, 2026 (the "2026 Notes") on a one-for-one basis for newly-issued convertible senior notes maturing on June 15, 2029 (the "2029 Notes"). The Convertible Note Exchange was conducted with a limited number of holders of the 2026 Notes pursuant to exchange agreements dated as of May 12, 2025. The 2029 Notes are convertible at the option of the holders into shares of common stock, cash or a combination thereof, as elected by the Company, at any time prior to the close of business on the second scheduled trading day immediately preceding the maturity date. Holders who convert their 2029 Notes after November 13, 2025 and prior to June 1, 2029 (except for any conversion in connection with a make-whole fundamental change) are entitled to an interest make-whole payment equal to the sum of the remaining scheduled payments of interest that would have been made had the 2029 Notes remained outstanding from their conversion date through the earlier of (i) the date that is 18 months following their conversion date, and (ii) June 15, 2029, the maturity date. The initial conversion rate for the 2029 Notes is equivalent to an initial conversion price of approximately $6.18 per share of our common stock. The conversion rate is subject to adjustment in certain circumstances.

On May 12, 2025, we entered into note conversion agreements (each, a "Note Conversion Agreement") with two holders of the 2026 Notes to convert $10.0 million aggregate principal amount of 2026 Notes into shares of our common stock (the "Equitization Transaction") in three tranches. Our obligation to deliver shares in three tranches was initially accounted for as a share-settled liability measured at fair value. As of September 30, 2025, we completed the conversion of all three tranches, resulting in the issuance of an aggregate of 2,819,866 shares of our common stock to the two holders. We did not receive new cash proceeds in these transactions. We performed an assessment of the Convertible Note Exchange and Equitization Transaction and determined that these transactions were not a troubled debt restructuring and were a partial extinguishment of our 2026 Notes.

The Convertible Note Exchange and the Equitization Transaction reduced the aggregate principal balance of our 2026 Notes from $97.9 million to $17.1 million. (For further details, see "Note 6 – Debt").

*Embedded Derivatives*

We account for convertible instruments in accordance with ASC 470-20, *Debt with Conversion and Other Option*s, when we determine that embedded conversion features do not require bifurcation from the host instrument. We account for convertible instruments (when we have determined that the embedded conversion options should be bifurcated from their host instruments) in accordance with ASC 815 – *Derivative and Hedge Accounting* ("ASC 815"). Under ASC 815, proceeds received upon the issuance of the hybrid contract are allocated between the fair value of the notes and the fair value of the derivative. The derivative is subsequently marked-to-market at each reporting date based on current fair value, with the changes in fair value reported in the condensed consolidated statements of operations and comprehensive loss.

The embedded derivative on our 2029 Notes represents the conversion feature and interest make-whole feature available to holders of the 2029 Notes allowing them to convert the notes into common stock. The embedded derivative on our Term Loan represents the prepayment feature and the probability of the Company entering into a material transaction prompting us to prepay the Term Loan. (For further details, see "Note 6 – Debt").

*Discontinued Operations*

We review the presentation of planned or completed business dispositions in the condensed consolidated financial statements based on the available information and events that have occurred. The review consists of evaluating whether the business meets the definition of a component for which the operations and cash flows are clearly distinguishable from the other components of the business and, if so, whether it is anticipated that, after the disposal, the cash flows of the component would be eliminated from continuing operations and whether the disposition represents a strategic shift that has a major effect on operations and financial results. Planned or completed business dispositions are presented as discontinued operations when all the criteria described above are met.

On December 23, 2021, we closed on an Asset Purchase Agreement (the "Asset Purchase Agreement") with Rayner Surgical Inc. ("Rayner") for the sale of our commercial product OMIDRIA which we recorded as an OMIDRIA contract asset on our condensed consolidated balance sheet. As a result of the divestiture, the results of OMIDRIA activities are classified as discontinued operations in our condensed consolidated statements of operations and comprehensive loss and excluded from continuing operations for all periods presented.

We have rights to receive future royalties from Rayner on OMIDRIA net sales at royalty rates that vary based on geography and certain regulatory contingencies. Therefore, future OMIDRIA royalties are treated as variable consideration. The sale of OMIDRIA qualified as an asset sale under GAAP. To measure the OMIDRIA contract royalty asset, we use the expected value approach, which represents the sum of the discounted, probability-weighted royalty payments we would receive using a range of potential outcomes, provided it is probable that a significant reversal in the amount of cumulative income recognized will not occur.

Royalties earned are recorded as a reduction to the OMIDRIA contract royalty asset. All U.S. royalties received from Rayner through December 31, 2031 are remitted by Rayner to an escrow account established by Omeros, from which payments are made to DRI Healthcare Acquisition LP ("DRI") and are entirely pass-through in nature to the Company. These payments comprise interest expense, with the remainder treated as a reduction of the OMIDRIA royalty obligation. The amount recorded in discontinued operations in future periods will reflect interest earned on the outstanding OMIDRIA contract royalty asset at 11.0% and any amounts we receive that are different from the expected royalties. The OMIDRIA contract royalty asset is re-measured quarterly using the expected value approach, which incorporates actual results and future expectations. (See "Note 7 — Discontinued Operations – Sale of OMIDRIA").

*OMIDRIA Royalty Obligation*

We have sold to DRI our future U.S. based OMIDRIA royalty receipts through December 31, 2031, which we recorded as an OMIDRIA royalty obligation on our condensed consolidated balance sheet.

The OMIDRIA royalty obligation is valued based on our estimates of future royalties from Rayner. Interest expense is calculated at an implied effective interest rate of 10.27% and represents a component of the total pass-through payments to DRI from Rayner.

To the extent our estimates of future royalties differ materially from previous estimates, we will adjust the carrying amount of the OMIDRIA royalty obligation to reflect the present value of the revised estimated cash flows from Rayner utilizing the cumulative catch-up method. This is reflected as a remeasurement adjustment recognized as non-cash interest expense. Pass-through interest, remitted through an administrative agent by Rayner to DRI, and non-cash interest on remeasurements are recorded to continuing operations to arrive at interest (income) or expense on the OMIDRIA royalty obligation. (See "Note 8 — OMIDRIA Royalty Obligation").

------

[**Table of Contents**](#toc)

*Inventory*

We expense inventory costs related to product candidates as research and development expenses until regulatory approval is reasonably assured in the U.S. or the European Union ("EU"). Once approval is reasonably assured, costs, including amounts related to third-party manufacturing, transportation, and internal labor and overhead, will be capitalized.

*Right-of-Use Assets and Related Lease Liabilities*

We record operating leases as right-of-use assets and recognize the related lease liabilities equal to the fair value of the lease payments using our incremental borrowing rate when the implicit rate in the lease agreement is not readily available. We recognize variable lease payments when incurred. Costs associated with operating lease assets are recognized on a straight-line basis within operating expenses over the term of the lease.

We record finance lease obligations as a component of property and equipment and amortize these assets within operating expenses on a straight-line basis to their residual values over the shorter of the term of the underlying lease or the estimated useful life of the equipment. The interest component of finance lease obligations is included in interest expense and recognized using the effective interest method over the lease term.

We account for leases with initial terms of 12 months or less as an operating expense.

*Income Taxes*

The U.S. government enacted the *One Big Beautiful Bill Act* ("OBBBA") on July 4, 2025, which includes new IRC 174A. This section allows for immediate expensing of domestic research and development expenditures for tax years beginning after December 31, 2024, reversing the prior requirement under the *2017 Tax Cuts and Jobs Act* which capitalized domestic research and development costs over five years. The OBBBA also provides transition rules for domestic research and development expenditures for costs capitalized between December 31, 2021 and January 1, 2025. The Company is in the process of assessing the potential impact of this legislative change on our financial statement disclosures.

Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their tax basis. Deferred tax assets and liabilities are measured using enacted tax rates applied to taxable income in the years in which those temporary differences are expected to be recovered or settled. We recognize the effect of income tax positions only if those positions are more likely than not of being sustained upon an examination by the relevant taxing authority. A valuation allowance is established when it is more likely than not that the deferred tax assets will not be realized.

*Financial Instruments and Concentrations of Credit Risk*

Cash and cash equivalents, receivables, accounts payable, and accrued liabilities, which are recorded at invoiced amount or cost, approximate fair value based on the short-term nature of these financial instruments. The fair value of short-term investments is based on quoted market prices. Financial instruments that are potentially subject to concentrations of credit risk consist primarily of cash and cash equivalents, short-term investments, receivables, convertible notes, and term debt. Convertible notes and term debt are measured at fair market value at issuance. Associated embedded derivatives of the convertible notes and term debt are remeasured quarterly to fair value.

At times, our cash and cash equivalents balance held at financial institutions may exceed the federally insured limits. To limit the credit risk, we invest our excess cash in high-quality securities such as money market mutual funds, certificates of deposit and U.S. treasury bills.

*Recent Accounting Pronouncements*

In November 2024, the FASB issued ASU 2024-03, *Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures* (Subtopic 220-40): *Disaggregation of Income Statement Expense*, requiring public entities to disclose additional information about specific expense categories in the notes to the financial statements on an interim and annual basis. ASU 2024-03 is effective for annual years beginning after December 15, 2026, and for interim periods beginning after December 15, 2027, with early adoption permitted. The Company is currently evaluating the impact on its financial statement disclosures.

In November 2024, the FASB issued ASU 2024-04, *Debt - Debt with Conversion and Other Options (Subtopic 470-20): Induced Conversions of Convertible Debt Instruments*, which provides clarification on the accounting treatment of convertible debt settlements that occur under terms differing from those of the original instrument. The amendments specify that if the settlement is considered an induced conversion, an entity must recognize an inducement expense at the offer acceptance date. Conversely, if the settlement is treated as a debt extinguishment, an entity must recognize a gain or loss at the extinguishment date. This ASU is effective for all entities for annual years beginning after December 15, 2025, including interim periods within those years, with early adoption permitted. The Company is in the process of assessing the potential impact of this ASU on its debt accounting policies.

**Note 3**—**Net Loss Per Share** 

Basic net income (loss) per share ("Basic EPS") is computed by dividing net income (loss) by the weighted average number of common shares outstanding during the period. Diluted net income (loss) per share ("Diluted EPS") is computed by dividing net income (loss) by the weighted average number of common shares and potentially dilutive common shares outstanding during the period. Our potential dilutive securities include common shares related to our stock options which are calculated using the treasury stock method. Our potential dilutive securities related to our convertible senior notes are calculated using the if-converted method. In periods where we have a net loss from continuing operations but overall net income, we do not compute Diluted EPS because the effect would be anti-dilutive. When there is a net loss, potentially dilutive securities, like stock options, warrants, or convertible debt, are typically excluded from the diluted net loss per share calculation. Potentially dilutive securities excluded from Diluted EPS are calculated based on a weighted average of days in the quarter from when the respective transactions occurred and are shown as follows:

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **Three Months Ended** | **Three Months Ended** | **Nine Months Ended** | **Nine Months Ended** |
|  | **September 30,** | **September 30,** | **September 30,** | **September 30,** |
|  | **2025** | **2024** | **2025** | **2024** |
| 2029 Notes convertible to common stock <sup>(1)</sup> | 11453883 |  | 5831831 |  |
| 2026 Notes convertible to common stock <sup>(1)(2)(3)</sup> | 1027619 | 5293414 | 1197817 | 8882651 |
| Outstanding options to purchase common stock | 284325 | 176121 | 2032754 | 108507 |
| Total potentially dilutive shares excluded from net loss per share | 12765827 | 5469535 | 9062402 | 8991158 |

---

(1) On May 14, 2025, we exchanged $70.8 million aggregate principal amount of our 2026 Notes for 2029 Notes on a one-for-one basis in the Convertible Note Exchange and recorded a reduction of an additional $10.0 million aggregate principal amount of our 2026 Notes to be equitized pursuant to the Equitization Transaction. The 2029 Notes are subject to a conversion arrangement that potentially increases the dilutive effect of conversion as described in "Note 6 — Debt." 

<sup>(2)</sup> The 2026 Notes are subject to a capped call arrangement that potentially reduces the dilutive effect of conversion as described in "Note 6 — Debt." Any potential impact of the capped call arrangement is excluded from this table.<br>

<sup>(3)</sup> On June 3, 2024, we repurchased $118.1 million of our 2026 Notes, reducing any effect of the dilution related to these notes. (For further details refer to "Note 6 — Debt").<br>

**Note 4**—**Fair-Value Measurements** 

Fair value is defined 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 accounting standard establishes a fair value hierarchy that requires an entity to maximize the use of observable inputs, where available. The following summarizes the three levels of inputs required:

Level 1—Observable inputs for identical assets or liabilities, such as quoted prices in active markets;

Level 2—Inputs other than quoted prices in active markets that are either directly or indirectly observable; and

Level 3—Unobservable inputs in which little or no market data exists, therefore they are developed using estimates and assumptions developed by us, which reflect those that a market participant would use.

We review the fair value hierarchy classification on a quarterly basis. Changes in the observability of valuation inputs may result in a reclassification of levels for certain securities within the fair value hierarchy. There have been no transfers of assets or liabilities between fair value measurement classifications during the nine months ended September 30, 2025.

Our fair value hierarchy for our financial assets and liabilities measured at fair value on a recurring basis are as follows:

---

| | | | |
|:---|:---|:---|:---|
|  | **September 30, 2025** | **September 30, 2025** | **September 30, 2025** |
|  | **Level 1** | **Level 3** | **Total** |
|  | **(In thousands)** | **(In thousands)** | **(In thousands)** |
| **Assets:** |  |  |  |
| Cash and cash equivalents: |  |  |  |
| Certificate of deposit classified as non-current restricted investments | $1054 | $— | $1054 |
| Short-term investment: |  |  |  |
| Money-market funds | 33690 |  | 33690 |
| Total Assets | $34744 | $— | $34744 |
| **Liabilities:** |  |  |  |
| Term Loan |  |  |  |
| Call and put options derivative <sup>(1)</sup> | $— | $(1566) | $(1566) |
| 2029 Notes: |  |  |  |
| 2029 Note conversion option derivative |  | (22163) | (22163) |
| Total Liabilities | $— | $(23729) | $(23729) |

---

(1) While the Term Loan is recorded as a liability, the embedded call and put options that have been identified as requiring bifurcation are recognized as a net embedded derivative liability reflected as a component of the Term Loan on the balance sheet.

---

| | | | |
|:---|:---|:---|:---|
|  | **December 31, 2024** | **December 31, 2024** | **December 31, 2024** |
|  | **Level 1** | **Level 3** | **Total** |
|  | **(In thousands)** | **(In thousands)** | **(In thousands)** |
| **Assets:** |  |  |  |
| Cash and cash equivalents: |  |  |  |
| Certificate of deposit classified as non-current restricted investments | $1054 | $— | $1054 |
| Short-term investment: |  |  |  |
| Money-market funds | 86732 |  | 86732 |
| Total Assets | $87786 | $— | $87786 |
| **Liabilities:** |  |  |  |
| Term Loan |  |  |  |
| Call and put options derivative <sup>(1)</sup> | $— | $235 | $235 |
| Total Liabilities | $— | $235 | $235 |

---

(1) While the Term Loan is recorded as a liability, the embedded call and put options that have been identified as requiring bifurcation are recognized as a net embedded derivative asset reflected as a component of the Term Loan on the balance sheet.

Cash held in demand deposit accounts of $2.4 million and $3.4 million is excluded from our fair-value hierarchy disclosure as of September 30, 2025 and December 31, 2024, respectively. The carrying amounts reported in the accompanying condensed consolidated balance sheets for receivables, accounts payable and accrued liabilities, and other current monetary assets and liabilities approximate fair value.

All of our investments, which are classified as Level 1 assets, are short-term and held in our name. Money market funds are classified as available-for-sale.

Our share-settled liability and embedded derivatives are classified as Level 3 assets and liabilities. Our embedded derivatives are grouped with their related host contract as a net liability on our condensed consolidated balance sheet. (For further details see "Note 6 – Debt").

The fair value of our embedded derivatives were determined using both the Lattice and Discounted Cash Flow models with the following key assumptions:

---

| | | |
|:---|:---|:---|
|  | **September 30,** | **December 31,** |
|  | **2025** | **2024** |
| **Term Loan derivative** |  |  |
| Interest comprised of: |  |  |
| &nbsp;&nbsp;&nbsp; SOFR benchmark rate | 3.10 - 3.72% | 3.91 - 4.30% |
| Securitized discount rate | 11.16% | 13.16% |
| Yield volatility | 28% | 21% |
| Probability weighted term (in years) | 0.7 | 3.4 |

---

Changes in valuation assumptions could have a significant impact on our Term Loan derivative. The Company can provide no assurance that changes in yield would not be significant in the future.

---

| | |
|:---|:---|
|  | **September 30,** |
|  | **2025** |
| **2029 Note conversion option derivative** |  |
| Stock price (per share) | $4.10 |
| Unsecuritized discount rate | 18.35% |
| Risk-free rate | 3.59% |
| Stock price volatility | 70% |
| Dividend yield | —% |
| Term (in years) | 3.7 |

---

Changes in valuation assumptions could have a significant impact on the 2029 Note conversion option derivative. The Company can provide no assurance that changes in yield or in our stock price would not have a significant impact on the derivative in the future. An increase in our stock price volatility could increase the valuation of the 2029 Note conversion option derivative, whereas an increase in interest rates could decrease the valuation of the 2029 Note conversion option derivative.

The following table sets forth a summary of changes in the fair value of Level 3 liabilities for the nine months ended September 30, 2025:

---

| | | | | | |
|:---|:---|:---|:---|:---|:---|
|  | **Balance as of** |  |  |  | **Balance as of** |
|  | **December 31,** |  |  |  | **September 30,** |
|  | **2024** | **Additions** | **Change in Fair Value** | **Conversions** | **2025** |
|  | **(In thousands)** | **(In thousands)** | **(In thousands)** | **(In thousands)** | **(In thousands)** |
| **Liabilities:** |  |  |  |  |  |
| Share-settled liability | $— | $(9838) | $295 | $9543 | $— |
| Term Loan |  |  |  |  |  |
| Call and put options derivative | 235 |  | (1801) |  | (1566) |
| 2029 Notes: |  |  |  |  |  |
| 2029 Note conversion option derivative |  | (22989) | 826 |  | (22163) |
| Total Liabilities | $235 | $(32827) | $(680) | $9543 | $(23729) |

---

**Note 5** — **Certain Balance Sheet Accounts**

*OMIDRIA Contract Royalty Asset*

The OMIDRIA contract royalty asset consists of the following:

---

| | | |
|:---|:---|:---|
|  | **September 30,** | **December 31,** |
|  | **2025** | **2024** |
|  | **(In thousands)** | **(In thousands)** |
| Short-term contract royalty asset | $25052 | $29083 |
| Long-term contract royalty asset | 99031 | 124266 |
| &nbsp;&nbsp;&nbsp; Total OMIDRIA contract royalty asset | $124083 | $153349 |

---

See "Note 7 — Discontinued Operations – Sale of OMIDRIA" for discussion regarding the estimated fair value of our OMIDRIA contract royalty asset.

*Receivables* 

Receivables consist of the following:

---

| | | |
|:---|:---|:---|
|  | **September 30,** | **December 31,** |
|  | **2025** | **2024** |
|  | **(In thousands)** | **(In thousands)** |
| OMIDRIA royalty receivables | $6045 | $6940 |
| Other receivables | 863 | 799 |
| &nbsp;&nbsp;&nbsp; Total receivables | $6908 | $7739 |

---

OMIDRIA royalty receivables represents approximately two months of royalty earnings from Rayner. All U.S. royalties received from Rayner are remitted by Rayner to an escrow account, established by Omeros, from which payments are made on our behalf to DRI. These payments are entirely pass-through in nature to the Company with DRI as the recipient.

------

[**Table of Contents**](#toc)

*Property and Equipment, Net*

Property and equipment, net consists of the following:

---

| | | |
|:---|:---|:---|
|  | **September 30,** | **December 31,** |
|  | **2025** | **2024** |
|  | **(In thousands)** | **(In thousands)** |
| Equipment under finance lease obligations | $8324 | $8323 |
| Laboratory equipment | 3743 | 3690 |
| Computer equipment | 1113 | 1113 |
| Office equipment and furniture | 624 | 624 |
| &nbsp;&nbsp;&nbsp; Total cost | 13804 | 13750 |
| Less accumulated depreciation and amortization | (11795) | (11072) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Total property and equipment, net | $2009 | $2678 |

---

For the three months ended September 30, 2025 and 2024, depreciation and amortization expense was $0.2 million, for each period. For the nine months ended September 30, 2025 and 2024, depreciation and amortization expense was $0.7 million and $0.6 million, respectively.

*Accrued Expenses*

Accrued expenses consist of the following:

---

| | | |
|:---|:---|:---|
|  | **September 30,** | **December 31,** |
|  | **2025** | **2024** |
|  | **(In thousands)** | **(In thousands)** |
| Employee compensation | $12137 | $8868 |
| Clinical trials | 6724 | 7100 |
| Interest payable | 3367 | 2667 |
| Contract research and development | 2323 | 4334 |
| Consulting and professional fees | 922 | 2602 |
| Other accrued expenses | 272 | 434 |
| Total accrued expenses | $25745 | $26005 |

---

------

[**Table of Contents**](#toc)

**Note 6**—**Debt**

Convertible senior notes, net, and term debt balances are comprised of the following:

---

| | | | |
|:---|:---|:---|:---|
|  |  | **September 30,** | **December 31,** |
|  |  | **2025** | **2024** |
|  |  | **(In thousands)** | **(In thousands)** |
| Convertible senior notes, net maturing on June 15, 2029 (2029 Notes) | Long-term | $72075 | $— |
| Term debt, net maturing on June 3, 2028 (Term Loan) | Short-term |  | 21000 |
| Term debt, net maturing on June 3, 2028 (Term Loan) | Long-term | 87480 | 69405 |
| Convertible senior notes, net maturing on February 15, 2026 (2026 Notes) | Short-term | 17036 |  |
| Convertible senior notes, net maturing on February 15, 2026 (2026 Notes) | Long-term |  | 97178 |
|  |  | $176591 | $187583 |

---

***Exchange of 2026 Notes for 2029 Notes and Common Stock***

On May 14, 2025, we completed the exchange of $70.4 million of net carrying value of our 2026 Notes on a one-for-one basis for newly issued convertible senior notes maturing on June 15, 2029 which had a fair market value of $73.5 million. The $70.4 million net carrying value of our 2026 Notes includes $70.8 million of aggregate principal amount less $0.4 million of issuance costs. Including the Equitization Transaction, this exchange resulted in a net $3.0 million loss on extinguishment which we recorded to our statement of operations and comprehensive loss. The Convertible Note Exchange was conducted with a limited number of holders of the 2026 Notes pursuant to exchange agreements dated May 12, 2025 (each, an "Exchange Agreement").

The 2029 Notes were issued pursuant to an Indenture, dated as of August 14, 2020 (the "Base Indenture"), between the Company and Computershare Trust Company, National Association, as successor to Wells Fargo Bank, National Association, as trustee (the "Trustee"), as supplemented by a Second Supplemental Indenture, dated as of May 14, 2025 (the "Second Supplemental Indenture"), between the Company and the Trustee (the Base Indenture, as amended and supplemented by the Second Supplemental Indenture, the "Indenture"). The 2029 Notes will mature on June 15, 2029 unless earlier converted, redeemed or repurchased in accordance with their terms prior to such date.

Interest on the 2029 Notes is payable semi-annually in arrears at a rate of 9.50% per annum on each June 15 and December 15, beginning on December 15, 2025. Due to the discount amortization on the 2029 Notes, interest expense is currently being recognized at an implied effective interest rate of 1.82%. The 2029 Notes are convertible at the option of the holder into shares of common stock, cash or a combination thereof, as elected by us, at any time prior to the close of business on the second scheduled trading day immediately preceding the maturity date. The conversion rate is 161.81 shares of our common stock per $1,000 of note principal (equivalent to an initial conversion price of approximately $6.18 per share of common stock), which equals approximately 11.5 million shares issuable upon conversion. The conversion rate is subject to adjustment in certain circumstances as described in the Indenture.

Holders who convert their 2029 Notes from, and including, November 14, 2025 to, but excluding, June 1, 2029 (except for any conversion in connection with a make-whole fundamental change) will also be entitled to an interest make-whole payment equal to the sum of the remaining scheduled payments of interest that would have been made on the 2029 Notes to be converted had such notes remained outstanding from the conversion date through the earlier of (i) the date that is 18 months following the conversion date and (ii) the maturity date. We recorded a $23.0 million initial embedded derivative as a component of our 2029 Notes which represents the conversion feature available to holders of the 2029 Notes allowing them to convert the notes into common stock. At September 30, 2025, we marked-to-market the initial $23.0 million embedded derivative on the 2029 Notes to $22.2 million, recording a net $0.8 million gain on remeasurement to our condensed consolidated statement of operations and comprehensive loss. The 2029 Notes include a discount which we amortize as an addition to the carrying value and treat as non-cash interest expense in the condensed consolidated statement of operations and comprehensive loss over the duration of the term.

The 2029 Notes will be redeemable, in whole or in part, at our option at any time, and from time to time, on or after June 20, 2027 and on or before the 50th scheduled trading day immediately before the maturity date, at a cash redemption price equal to the principal amount of the 2029 Notes to be redeemed, plus accrued and unpaid interest to, but excluding, the redemption date, but only if the last reported sale price per share of our common stock exceeds 130% of the conversion price on (i) each of at least 20 trading days, whether or not consecutive, during the 30 consecutive trading days ending on, and including, the trading day immediately before the date we send the related redemption notice and (ii) the trading day immediately before the date we send such notice. In addition, calling any 2029 Note for redemption will constitute a "make-whole fundamental change" (as defined in the Indenture) with respect to that 2029 Note, in which case the conversion rate applicable to the conversion of that 2029 Note will be increased in certain circumstances if it is converted after it is called for redemption.

The Indenture contains customary terms and covenants and events of default. If an event of default (other than certain events of bankruptcy, insolvency or reorganization involving the Company) occurs and is continuing, the Trustee or the holders of at least 25% in aggregate principal amount of the 2029 Notes then outstanding may declare the principal amount of, and all accrued and unpaid interest on, all of the 2029 Notes then outstanding to become due and payable immediately. Upon the occurrence of certain events of bankruptcy, insolvency or reorganization involving the Company, the principal amount of, and all accrued and unpaid interest, if any, on all of the 2029 Notes then outstanding will immediately become due and payable without any further action or notice by the Trustee or any holder. Notwithstanding the foregoing, the Indenture provides that, to the extent we elect and for up to 180 days, the sole remedy for an event of default relating to certain failures by us to comply with certain reporting covenants in the Indenture may consist exclusively of the right to receive special interest on the 2029 Notes.

The 2029 Notes are structurally subordinated to all existing and future indebtedness and other liabilities, including trade payables, and (to the extent we are not a holder thereof) preferred equity, if any, of its subsidiaries.

*Equitization Transaction*

On May 12, 2025, we entered into Note Conversion Agreements with two holders of the 2026 Notes to convert $10.0 million aggregate principal amount of the 2026 Notes into shares of our common stock. Under the terms of the Note Conversion Agreements, the holders agreed to convert the equitized principal amount of the 2026 Notes in three tranches for a number of shares of common stock to be determined based in part on the closing price of our common stock on May 9, 2025 and in part based on the 20-day volume-weighted average price applicable to each tranche conversion date, subject to a floor conversion price. Accordingly, the Equitization Transaction resulted in us initially recording a share-settled liability measured at fair value. As of September 30, 2025, we completed the Equitization Transaction, resulting in the issuance of an aggregate of 2,819,866 shares of common stock to the two holders.

The Convertible Note Exchange transaction and Equitization Transaction reduced the aggregate principal balance of our 2026 Notes from $97.9 million to $17.1 million. The $80.8 million reduction in aggregate principal amount of our 2026 Notes reflects the exchange of $70.8 million aggregate principal amount of 2026 Notes for the same principal amount of 2029 Notes under the Convertible Note Exchange and the reduction of $10.0 million in aggregate principal amount equitized under the Note Conversion Agreements.

The amount outstanding on the 2029 Notes is as follows:

---

| | |
|:---|:---|
|  | **September 30,** |
|  | **2025** |
|  | **(In thousands)** |
| Principal amount | $70785 |
| Unamortized debt discount, net of issuance costs | (20873) |
| Fair value of embedded derivative | 22163 |
| Total unsecured convertible senior notes, net | $72075 |
| Fair value of outstanding unsecured convertible senior notes <sup>(1)</sup> | $62061 |

---

(1) The fair value is classified as a Level 2 liability due to the limited trading activity for the 2029 Notes. This balance reflects the fair value of the 2029 Notes based on quoted prices in an over-the counter market using the most recent trading information at the end of the reporting period.

The following table sets forth interest expense recognized related to the 2029 Notes:

---

| | | |
|:---|:---|:---|
|  | **Three Months Ended** | **Nine Months Ended** |
|  | **September 30,** | **September 30,** |
|  | **2025** | **2025** |
|  | **(In thousands)** | **(In thousands)** |
| Contractual interest expense | $1682 | $2541 |
| Amortization of debt discount and issuance costs | 1458 | 2206 |
| Total interest expense | $3140 | $4747 |

---

***2024 Secured Term Loan***

On June 3, 2024, we entered into a Credit Agreement with the Lenders, pursuant to which we have an outstanding Term Loan of $67.1 million. All indebtedness under the Credit Agreement is secured by a first-priority security interest in and lien on substantially all our tangible and intangible property, subject to customary exceptions, and excluding royalty interests in OMIDRIA and certain related rights.

In connection with our entry into the Credit Agreement, we used the $67.1 million in Term Loan proceeds along with $21.7 million of cash on hand to repurchase $118.1 million aggregate principal amount of the 2026 Notes held by the Lenders. The $29.3 million difference between the total consideration paid at closing of $88.8 million and the $118.1 million aggregate principal amount of the 2026 Notes was recorded as a premium (i.e., an increase) to the long-term debt on the Company's condensed consolidated balance sheet. The premium is being amortized as both a non-cash reduction of long-term debt in the condensed consolidated balance sheets and interest expense in the condensed consolidated statement of operations and comprehensive loss over the duration of the Term Loan.

The Transaction with Novo Nordisk is expected to close in the fourth quarter of 2025 and would provide us with $240.0 million in upfront cash, a portion of which would be applied to the full and immediate repayment of our $67.1 million principal outstanding under the Term Loan, along with a related prepayment premium, certain expenses and accrued and unpaid interest.

The amount outstanding on the Term Loan is as follows:

---

| | | |
|:---|:---|:---|
|  | **September 30,** | **December 31,** |
|  | **2025** | **2024** |
|  | **(In thousands)** | **(In thousands)** |
| Principal amount | $67077 | $67077 |
| Unamortized debt premium, net of issuance costs and other | 18837 | 23563 |
| Fair value of embedded derivative | 1566 | (235) |
| Total term debt, net | $87480 | $90405 |
| Fair value of outstanding term debt <sup>(1)</sup> | $70007 | $69530 |

---

(1) The fair value of the Term Loan is classified as a Level 3 liability. We determine the fair market value by discounting future cash flows based on adjusted SOFR at each measurement date.

The Term Loan has a stated maturity date of June 3, 2028 and bears interest at an adjusted secured overnight financing rate ("adjusted SOFR"), subject to a 3.00% floor, plus 8.75% per annum, payable quarterly from the Closing Date. As of September 30, 2025, the contractual interest rate on the Term Loan was 13.02%. We have the option to pay all of the interest in cash or to pay 50% in cash and pay-in-kind ("PIK"), the remaining interest. When this provision is elected, interest for the quarter, including both the cash interest and PIK interest, is calculated based on adjusted SOFR plus a 10.25% PIK margin (instead of the customary 8.75% margin). The PIK interest is then added to the outstanding principal balance and interest is computed using the original adjusted SOFR plus 8.75% margin rate. Due to the premium amortization on the Term Loan, interest expense is currently being recognized at an implied effective interest rate of 3.36%.

The following table sets forth interest expense recognized related to the Term Loan:

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **Three Months Ended** | **Three Months Ended** | **Nine Months Ended** | **Nine Months Ended** |
|  | **September 30,** | **September 30,** | **September 30,** | **September 30,** |
|  | **2025** | **2024** | **2025** | **2024** |
|  | **(In thousands)** | **(In thousands)** | **(In thousands)** | **(In thousands)** |
| Contractual interest expense | $2258 | $2433 | $6723 | $3147 |
| Amortization of debt premium and issuance costs | (1512) | (2060) | (4727) | (2659) |
| Total interest expense | $746 | $373 | $1996 | $488 |

---

We may elect to prepay the Term Loan, in whole or in part, in cash, plus an applicable prepayment and/or make-whole premium. Under certain circumstances, we are required to prepay all or a portion of the outstanding Loans, plus an applicable prepayment and/or make-whole premium, as described below.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1) As a result of the Convertible Note Exchange completed on May 14, 2025, a prepayment requirement under the Term Loan was no longer applicable because the outstanding principal amount under the 2026 Notes was reduced below $38.5 million. As a result, the accompanying condensed consolidated balance sheet as of September 30, 2025 reflects the entire Term Loan as a long-term liability.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2) Upon the occurrence of a change in control, we must prepay the entire outstanding amount of the Term Loan, plus the applicable make-whole or prepayment premium.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(3) We must prepay the outstanding Term Loan in an amount equal to: (i) 25.0% of any milestone payments received from DRI or its affiliates on the basis of net sales of OMIDRIA; (ii) 60.0% of the net cash proceeds (excluding transaction expenses and certain milestone payments) received by Omeros from the sale or license of our assets; (iii) 100.0% of net cash proceeds of indebtedness incurred by the Company other than as permitted by the Credit Agreement; and (iv) 100.0% of the net cash proceeds of insurance recoveries on loss of property, except to the extent utilized to repair or replace the relevant assets within a specified time. In connection with the anticipated closing of the Transaction with Novo Nordisk, we will be required to repay the full amount of the Term Loan principal of $67.1 million, a prepayment premium, certain expenses and accrued and unpaid interest.

Voluntary and mandatory prepayments of the Term Loan are subject to payment of the following premiums: (i) during the first year of such amounts are outstanding under the Term Loan, a make-whole premium plus 5.0% of the applicable prepayment amount (unless the prepayment is made in contemplation of a change of control, in which case only the make-whole premium would be payable); (ii) during the second year, a prepayment premium equal to 5.0% of the applicable prepayment amount; and (iii) during the third year, a prepayment premium equal to 3.0% of the applicable prepayment amount.

The Credit Agreement contains certain customary default provisions, representations and warranties and affirmative and negative covenants. These include a covenant requiring us to maintain at all times unrestricted cash, cash equivalents and short-term investments of at least $25.0 million in accounts subject to control agreements. As of September 30, 2025 and through the date of issuance of these condensed consolidated financial statements, the Company was in compliance with the covenants under the Credit Agreement. A default under the Credit Agreement that results in the outstanding debt thereunder being declared due and payable prior to the stated maturity would constitute a cross-default under the indenture governing the 2026 Notes and the 2029 Notes, as applicable. In such an event, the principal and all accrued and unpaid interest on the 2026 Notes and the 2029 Notes may be declared immediately due and payable either by the trustee under the applicable indenture, or by holders of at least 25% of the aggregate outstanding principal amounts of the 2026 Notes and the 2029 Notes, respectively.

The Transaction with Novo Nordisk would result in the release in full of all liens and covenants thereunder including the covenant whereby we must maintain a minimum $25.0 million of unrestricted cash, cash equivalents and short-term investments at all times.

***2026 Unsecured Convertible Senior Notes***

We have outstanding unsecured convertible senior notes which accrue interest at an annual rate of 5.25% per annum, payable semi-annually in arrears on February 15 and August 15 of each year. The 2026 Notes mature on February 15, 2026, unless earlier purchased, redeemed or converted in accordance with their terms.

In 2024, we repurchased $118.1 million of principal amount outstanding on our 2026 Notes for total consideration of $88.8 million (approximately 75% of par value), using proceeds from the Term Loan of $67.1 million and paying $21.7 million of cash on hand.

On May 14, 2025, we completed the Convertible Note Exchange in which we exchanged $70.8 million in aggregate principal of our 2026 Notes for a like principal amount of our 2029 Notes. On May 12, 2025, we entered into the Equitization Transaction, which resulted in the conversion of an additional $10.0 million aggregate principal amount of 2026 Notes into 2,819,866 shares of our common stock. The principal balance of our 2026 Notes was reduced from $97.9 million to $17.1 million as a result of the Convertible Note Exchange and Equitization Transaction.

Amounts outstanding on our 2026 Notes as of September 30, 2025 and December 31, 2024 are as follows:

---

| | | |
|:---|:---|:---|
|  | **September 30,** | **December 31,** |
|  | **2025** | **2024** |
|  | **(In thousands)** | **(In thousands)** |
| Principal amount | $17077 | $97862 |
| Unamortized debt issuance costs | (41) | (684) |
| Total unsecured convertible senior notes, net | $17036 | $97178 |
| Fair value of outstanding unsecured convertible senior notes <sup>(1)</sup> | $16926 | $93752 |

---

(1) The fair value is classified as Level 2 liability due to the limited trading activity for the 2026 Notes. This balance reflects the fair value of the 2026 Notes based on quoted prices in an over-the counter market using the most recent trading information at the end of the reporting period. The value of the conversion feature of the 2026 Notes is not deemed to be significant as the current market price of our common stock is below the initial conversion price of $18.49 per share of common stock.

The $80.8 million reduction in aggregate principal amount of our 2026 Notes reflects the exchange of $70.8 million aggregate principal amount of 2026 Notes for 2029 Notes under the Convertible Note Exchange and the reduction of $10.0 million in aggregate principal amount equitized under the Note Conversion Agreements. We have amortized interest expense on the 2026 Notes at an effective interest rate of 5.89%.

The following table sets forth interest expense recognized related to the 2026 Notes:

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **Three Months Ended** | **Three Months Ended** | **Nine Months Ended** | **Nine Months Ended** |
|  | **September 30,** | **September 30,** | **September 30,** | **September 30,** |
|  | **2025** | **2024** | **2025** | **2024** |
|  | **(In thousands)** | **(In thousands)** | **(In thousands)** | **(In thousands)** |
| Contractual interest expense | $248 | $1284 | $2323 | $6488 |
| Amortization of debt discount and issuance costs | 20 | 144 | 260 | 713 |
| Total interest expense | $268 | $1428 | $2583 | $7201 |

---

The conversion rate is 54.0906 shares of our common stock per $1,000 of note principal (equivalent to an initial conversion price of approximately $18.4875 per share of common stock), which equals approximately 1.3 million shares issuable upon conversion, subject to adjustment in certain circumstances.

The 2026 Notes are convertible at the option of the holders on or after November 15, 2025 at any time prior to the close of business on February 12, 2026, the second scheduled trading day immediately before the stated maturity date of February 15, 2026. Additionally, holders may convert their 2026 Notes at their option at specified times prior to the maturity date only if:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1) during any calendar quarter, the last reported sale price per share of our common stock exceeds 130% of the conversion price of the 2026 Notes for each of at least 20 trading days, whether or not consecutive, in the period of 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2) during the five consecutive business days immediately after any five-consecutive-trading-day period (such five-consecutive-trading-day period, the "measurement period") in which the trading price per $1,000 principal amount of 2026 Notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price per share of our common stock on such trading day and the conversion rate on such trading day;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(3) there is an occurrence of one or more certain corporate events or distributions of our common stock; or

(4) we call the 2026 Notes for redemption.

We will settle any conversions by paying or delivering, as applicable, cash, shares of our common stock or a combination of cash and shares of our common stock, at our election, based on the applicable conversion rate(s).

Subject to the satisfaction of certain conditions, we may redeem in whole or in part the 2026 Notes at our option through the 50th scheduled trading day immediately before the maturity date at a cash redemption price equal to the principal amount of the 2026 Notes to be redeemed plus any accrued and unpaid interest. The 2026 Notes are subject to redemption only if certain requirements are satisfied, including that the last reported sale price per share of our common stock exceeds 130% of the conversion price on (i) each of at least 20 trading days, whether or not consecutive, during the 30 consecutive trading days ending on, and including, the trading day immediately before the date we send the related redemption notice and (ii) the trading day immediately before the date we send such notice.

In order to reduce the dilutive impact or potential cash expenditure associated with the conversion of the 2026 Notes, we entered into capped call transactions in connection with the issuances of the 2026 Notes (the "2026 Capped Call"). The 2026 Capped Call will cover, subject to anti-dilution adjustments substantially similar to those applicable to the 2026 Notes, the number of shares of common stock underlying the 2026 Notes when our common stock is trading within the range of approximately $18.49 and $26.10. However, should the market price of our common stock exceed the $26.10 cap, then the conversion of the 2026 Notes would have an additional dilutive impact or may require a cash expenditure to the extent the market price of our common stock exceeds the cap price. The 2026 Capped Call will expire on various dates over the 50-trading-day period ranging from December 2, 2025 to February 12, 2026, if not exercised earlier. The 2026 Capped Call is a separate transaction and not part of the terms of the 2026 Notes and was executed separately from the issuance of the 2026 Notes. The amount paid for the 2026 Capped Call was recorded as a reduction to additional paid-in capital in the condensed consolidated balance sheet. As of September 30, 2025, approximately 12.2 million shares remained outstanding under the 2026 Capped Call. We also retain all potential future value of the capped call purchased in connection with the issuance of the 2026 Notes covering all shares underlying the original 2026 Notes. The capped call will expire on the maturity date of the 2026 Notes.

Further, we concluded the 2026 Capped Call qualifies for a derivative scope exception for instruments that are both indexed to an entity's own stock and classified in stockholders' equity in its balance sheet. Consequently, the fair value of the 2026 Capped Call of $23.2 million is classified as equity, not accounted for as derivatives, and will not be subsequently remeasured.

***Minimum Commitments***

As of September 30, 2025, the contractual principal payments on our 2026 Notes, Term Loan and 2029 Notes are as follows:

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **2026 Notes** | **Term Loan** | **2029 Notes** | **Total** |
|  | **(In thousands)** | **(In thousands)** | **(In thousands)** | **(In thousands)** |
| 2025 | $— | $— | $— | $— |
| 2026 | 17077 |  |  | 17077 |
| 2027 |  |  |  |  |
| 2028 |  | 67077<sup>(1)</sup> |  | 67077 |
| 2029 and thereafter |  |  | 70785 | 70785 |
| Total principal payments | 17077 | 67077 | 70785 | 154939 |
| Net unamortized premiums, discounts, derivatives and issuance costs | (41) | 20403 | 1290 | 21652 |
| Carrying value of debt | $17036 | $87480 | $72075 | $176591 |

---

(1) Under the terms of the Credit Agreement, the Company will be required to repay all outstanding obligations related to the Term Loan upon closure of the Transaction with Novo Nordisk, which is expected to occur in the fourth quarter of 2025.

------

[**Table of Contents**](#toc)

**Note 7**—**Discontinued Operations - Sale of OMIDRIA**

On December 23, 2021, we sold the rights to OMIDRIA and related assets to Rayner, which is reported as discontinued operations in our condensed consolidated statements of operations and comprehensive loss and excluded from continuing operations for all periods presented.

The results of operations for OMIDRIA are recorded as income from discontinued operations for all periods presented in the condensed consolidated statements of operations and comprehensive loss are as follows:

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **Three Months Ended** | **Three Months Ended** | **Nine Months Ended** | **Nine Months Ended** |
|  | **September 30,** | **September 30,** | **September 30,** | **September 30,** |
|  | **2025** | **2024** | **2025** | **2024** |
|  | **(In thousands)** | **(In thousands)** | **(In thousands)** | **(In thousands)** |
| Interest earned on OMIDRIA contract royalty asset | $3682 | $4210 | $11521 | $12824 |
| Remeasurement adjustments | (13403) | 731 | (16383) | 7384 |
| Other income (loss), net | 44 | (60) | (250) | 423 |
| Ex-US royalties | 3 |  | 9 |  |
| Net income (loss) from discontinued operations, net of tax | $(9674) | $4881 | $(5103) | $20631 |

---

The following is a roll forward of the OMIDRIA contract royalty asset (in thousands):

---

| | |
|:---|:---|
| OMIDRIA contract royalty asset at December 31, 2024 | $153349 |
| &nbsp;&nbsp;&nbsp; Royalties earned | (24404) |
| &nbsp;&nbsp;&nbsp; Interest earned on OMIDRIA contract royalty asset | 11521 |
| &nbsp;&nbsp;&nbsp; Remeasurement adjustments | (16383) |
| OMIDRIA contract royalty asset at September 30, 2025 | $124083 |

---

We remeasure the OMIDRIA contract royalty asset on a quarterly basis using the expected value approach, which incorporates actual results and future expectations.

Cash flow from discontinued operations is as follows:

---

| | | |
|:---|:---|:---|
|  | **Nine Months Ended** | **Nine Months Ended** |
|  | **September 30,** | **September 30,** |
|  | **2025** | **2024** |
|  | **(In thousands)** | **(In thousands)** |
| Net cash provided by discontinued operations from operating activities | $23283 | $30619 |

---

Net cash provided by discontinued operations primarily represents royalties received from Rayner. All royalties earned on OMIDRIA sales within the U.S. through December 31, 2031 are remitted by Rayner to an escrow account established by Omeros, from which payments are made to DRI.

**Note 8**—**OMIDRIA Royalty Obligation** 

In September 2022, we sold to DRI an interest in our future OMIDRIA royalty receipts and received $125.0 million in cash consideration, which was recorded as an OMIDRIA royalty obligation on our condensed consolidated balance sheet. DRI was entitled to receive royalties on OMIDRIA net sales between September 1, 2022 and December 31, 2030, subject to annual caps.

In February 2024, Omeros and DRI expanded their royalty purchase agreement under the Amendment, resulting in the elimination of previously existing annual caps on royalty payments and Omeros receiving an additional $115.5 million in cash consideration, which we accounted for as a modification of our existing debt from DRI. All royalties earned on OMIDRIA sales within the U.S. through December 31, 2031 are remitted by Rayner to an escrow account established by Omeros, from which payments are made to DRI.

We retain the right to receive all royalties payable by Rayner on any U.S. net sales of OMIDRIA after December 31, 2031 and on all royalties on global net sales of OMIDRIA payable from and after December 31, 2031. To date, international royalties have not been significant. DRI has no recourse to our assets other than its interest in OMIDRIA royalties.

We are also entitled to receive a milestone payment ranging between $10.0 million and $27.5 million if U.S. net sales of OMIDRIA reach applicable thresholds ranging between a total of $156.0 million and $160.0 million in the aggregate for any period of four consecutive quarters prior to January 1, 2026. We do not expect to receive this milestone payment. In addition, we are entitled to receive a separate milestone payment ranging between $8.0 million and $27.5 million if U.S. net sales of OMIDRIA reach applicable thresholds ranging between a total of $181.0 million and $185.0 million in the aggregate for any period of four consecutive quarters prior to January 1, 2028.

The changes in the OMIDRIA royalty obligation during the nine months ended September 30, 2025 are as follows (in thousands):

---

| | |
|:---|:---|
| Balance at December 31, 2024 | $216257 |
| &nbsp;&nbsp;&nbsp; Remeasurement on the OMIDRIA royalty obligation | (34171) |
| Principal payments | (10256) |
| Balance at September 30, 2025 | $171830 |

---

The OMIDRIA royalty obligation is classified as a Level 3 liability as its valuation requires substantial judgment and estimation of factors that are not currently observable in the market. The fair value of the OMIDRIA royalty obligation is determined by calculating the net present value of our estimated future OMIDRIA cash flows using the interest rate at inception of our royalty purchase agreement with DRI, adjusted for the change in the prime rate through the measurement date. As of September 30, 2025 and December 31, 2024, the approximate fair value of our obligation was $168.2 million and $209.7 million, respectively.

Interest expense is comprised of the effective interest component of any cash payment remitted through an administrative agent to DRI, based on an implied effective interest rate of 10.27%, and any remeasurement adjustments taken during the period. Remeasurements are non-cash adjustments to the OMIDRIA royalty obligation reflecting changes in forecasted cash flows stemming from the OMIDRIA contract royalty asset. For the three and nine months ended September 30, 2025 and 2024, interest expense is as follows:

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **Three Months Ended** | **Three Months Ended** | **Nine Months Ended** | **Nine Months Ended** |
|  | **September 30,** | **September 30,** | **September 30,** | **September 30,** |
|  | **2025** | **2024** | **2025** | **2024** |
|  | **(In thousands)** | **(In thousands)** | **(In thousands)** | **(In thousands)** |
| Pass through interest remitted through administrative agent | $4759 | $5585 | $15045 | $15231 |
| Non-cash remeasurement adjustment | (22292) | (3359) | (34170) | (1553) |
| Interest expense, net of remeasurement on OMIDRIA royalty obligation | $(17533) | $2226 | $(19125) | $13678 |

---

As of September 30, 2025, the expected scheduled principal and interest payments are as follows:

---

| | | | |
|:---|:---|:---|:---|
|  | **Principal** | **Interest** | **Total** |
|  | **(In thousands)** | **(In thousands)** | **(In thousands)** |
| 2025 | $4754 | $4121 | $8875 |
| 2026 | 19777 | 15320 | 35097 |
| 2027 | 22685 | 13273 | 35958 |
| 2028 | 25732 | 10944 | 36676 |
| 2029 and thereafter | 98882 | 15608 | 114490 |
| Total scheduled payments | $171830 | $59266 | $231096 |

---

**Note 9**—**Lease Liabilities**

We have an operating lease for our office and laboratory facilities with an initial term that ends in November 2027 and two options to extend the lease term by an additional five years each. Restricted investments of $1.1 million represent the security deposit on our office and laboratory facilities. We have finance leases for certain laboratory and office equipment that have lease terms expiring through October 2029.

Supplemental lease information is as follows:

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **Three Months Ended** | **Three Months Ended** | **Nine Months Ended** | **Nine Months Ended** |
|  | **September 30,** | **September 30,** | **September 30,** | **September 30,** |
|  | **2025** | **2024** | **2025** | **2024** |
|  | **(In thousands)** | **(In thousands)** | **(In thousands)** | **(In thousands)** |
| Lease cost |  |  |  |  |
| Operating lease cost | $1481 | $1610 | $4687 | $4822 |
| Finance lease cost: |  |  |  |  |
| Amortization | 186 | 173 | 553 | 468 |
| Interest | 25 | 26 | 114 | 122 |
| Variable lease cost | 928 | 824 | 2819 | 2622 |
| Sublease income | (85) | (364) | (810) | (1138) |
| Net lease cost | $2535 | $2269 | $7363 | $6896 |

---

------

[**Table of Contents**](#toc)

The supplemental cash flow information related to leases is as follows:

---

| | | |
|:---|:---|:---|
|  | **Nine Months Ended** | **Nine Months Ended** |
|  | **September 30,** | **September 30,** |
|  | **2025** | **2024** |
|  | **(In thousands)** | **(In thousands)** |
| Cash paid for amounts included in the measurement of lease liabilities |  |  |
| &nbsp;&nbsp;&nbsp; Cash payments for operating leases | $5166 | $5272 |
| &nbsp;&nbsp;&nbsp; Cash payments for financing leases | 685 | 534 |

---

**Note 10**—**Commitments and Contingencies**

*Good and Service Contracts* 

We have various agreements with third parties that collectively require payment of termination fees totaling $3.2 million as of September 30, 2025 if we cancel the work within specific time frames, either prior to commencing or during performance of the contracted services.

*Development Milestones and Product Royalties* 

We have entered a variety of development, collaboration, licensing or similar agreements with third parties under which we have accessed technology or services in connection with our development assets and programs. Some of these agreements require milestone payments based on achievements of development, regulatory or sales milestones, and/or low-single to low-double digit royalties on net income or net sales of the relevant product. For the three and nine months ended September 30, 2025 and 2024, development milestone expenses were not significant.

**Note 11**—**Shareholders**' **Deficit** 

*Common Stock* 

<u>At-the-Market Sales Agreement</u> - We have a sales agreement to sell shares of our common stock having an aggregate offering price of up to $150.0 million, from time to time, through an ATM equity offering program. During the three months ended September 30, 2025, we sold 2.3 million shares of common stock pursuant to our ATM program, generating $9.0 million at an average price per share of $3.99. During the nine months ended September 30, 2025, we sold 3.7 million shares of common stock generating net proceeds of $15.3 million at an average price per share of $4.24. Subsequent to September 30, 2025, we sold 0.6 million shares of common stock, generating net proceeds of $3.6 million at an average price per share of $6.11.

<u>Share Repurchase Program</u> - On November 9, 2023, the Board of Directors approved a share repurchase program under which we were permitted to repurchase from time to time up to $50.0 million of our common stock in the open market or through privately negotiated transactions. During the six months ended June 30, 2024, we repurchased and retired 3.2 million shares of common stock for an average price per share of $3.71 at an aggregate cost of $11.9 million. The terms of the Credit Agreement prohibit us from repurchasing our common stock unless expressly agreed to by the Lenders. Consequently, the Board of Directors terminated the share repurchase program effective upon the execution of the Credit Agreement.

<u>Equitization Transaction</u> - On May 12, 2025, we entered into Note Conversion Agreements with two holders of the 2026 Notes, which resulted in the conversion of $10.0 million aggregate principal amount of 2026 Notes into 2,819,866 shares of our common stock. (For further details, see "Note 6 – Debt").

<u>Registered Direct Offering</u> - On July 28, 2025, we issued and sold 5,365,853 shares of our common stock in a registered direct offering to Polar at a price of $4.10 per share, representing a 14% premium to the closing price of our common stock on the date of the definitive agreement for the purchase of the shares. We received $20.3 million in cash proceeds net of offering expenses.

**Note 12**—**Stock-Based Compensation**

Our stock option plans provide for the grant of incentive and non-qualified stock options, restricted stock awards, restricted stock units, and other stock awards to employees, non-employee directors, and consultants.

Stock-based compensation is as follows:

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **Three Months Ended** | **Three Months Ended** | **Nine Months Ended** | **Nine Months Ended** |
|  | **September 30,** | **September 30,** | **September 30,** | **September 30,** |
|  | **2025** | **2024** | **2025** | **2024** |
|  | **(In thousands)** | **(In thousands)** | **(In thousands)** | **(In thousands)** |
| Research and development | $856 | $1063 | $2807 | $3146 |
| Selling, general and administrative | 1085 | 1578 | 3652 | 4921 |
| Total stock-based compensation | $1941 | $2641 | $6459 | $8067 |

---

The fair value of each option grant is estimated on the date of grant using the Black-Scholes option-pricing model. The following assumptions were applied to all stock option grants:

---

| | | |
|:---|:---|:---|
|  | **Three Months Ended** | **Nine Months Ended** |
|  | **September 30, 2025** | **September 30, 2025** |
| Estimated weighted-average fair value | $3.20 | $2.62 |
| Weighted-average assumptions: |  |  |
| Expected volatility | 101% | 101% |
| Expected life, in years | 6.9 | 7.3 |
| Risk-free interest rate | 4.14% | 4.13% |
| Expected dividend yield | —% | —% |

---

Expected volatility is based on the historical volatility of our stock price weighted by grant issuances over the reporting period. We estimated the expected life of the stock options granted using the historical exercise behavior of option holders. The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of grant. Forfeiture expense is estimated at the time of grant and revised in subsequent periods if actual forfeitures differ from those estimates.

Stock option activity for all stock plans and related information is as follows:

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | | **Weighted-** | | |
|  | | **Average** | | **Aggregate** |
|  | | **Exercise** | **Remaining** | **Intrinsic** |
|  | **Options** | **Price per** | **Contractual Life** | **Value** |
|  | **Outstanding** | **Share** | **(In years)** | **(In thousands)** |
| Balance at December 31, 2024 | 16690882 | $8.17 |  |  |
| &nbsp;&nbsp;&nbsp; Granted | 3313400 | 3.29 |  |  |
| &nbsp;&nbsp;&nbsp; Exercised | (104384) | 3.01 |  |  |
| &nbsp;&nbsp;&nbsp; Forfeited | (427463) | 9.89 |  |  |
| Balance at September 30, 2025 | 19472435 | $7.33 | 6.1 | $9814 |
| Vested and expected to vest at September 30, 2025 | 18830366 | $7.47 | 6.0 | $9216 |
| Exercisable at September 30, 2025 | 13122673 | $9.31 | 4.8 | $3815 |

---

Through September 30, 2025, stock options to purchase an aggregate of approximately 3.3 million shares of our common stock were awarded to eligible participants under the 2017 Omnibus Incentive Compensation Plan in connection with annual refresh grants.

Of the 19.5 million common stock options outstanding as of September 30, 2025, options to purchase 8.3 million shares have an exercise price per share above $4.10, which was the closing price of our stock on the Nasdaq Global Market on September 30, 2025.

As of September 30, 2025, there were 6.3 million unvested options outstanding that will vest over a weighted-average period of 2.6 years. The total estimated compensation expense yet to be recognized on outstanding options is $14.0 million.

As of September 30, 2025, the total number of shares of common stock available for grant was 4.0 million.

------

[**Table of Contents**](#toc)

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

*The following discussion and analysis of our financial condition and results of operations should be read in conjunction with the unaudited condensed consolidated financial statements and notes thereto included elsewhere in this Quarterly Report on Form 10*-*Q and with our audited financial statements and the notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2024, which was filed with the SEC on March 31, 2025. In addition, you should read the section entitled* "*Risk Factors*" *and the disclaimers regarding forward-looking statements included herein and in our Annual Report on Form 10-K for the year ended December 31, 2024, for a discussion of important factors that could cause our results to differ materially from the results described in or implied by any forward-looking statements contained herein.*

**Overview** 

We are a clinical-stage biopharmaceutical company committed to discovering, developing, and commercializing first-in-class small-molecule and protein therapeutics for large-market as well as orphan indications targeting immunologic diseases, including complement-mediated diseases and cancers related to dysfunction of the immune system, as well as addictive and compulsive disorders.

*Complement Inhibitor Programs*

The complement system plays a role in the body's inflammatory response and becomes activated as a result of tissue damage or trauma or microbial pathogen invasion. Inappropriate or uncontrolled activation of the complement system can cause diseases characterized by serious tissue injury. Three main pathways can activate the complement system: classical, lectin, and alternative. We are focused on development of therapeutics to treat diseases associated with the lectin and/or alternative pathways of complement. We are developing antibodies as well as small-molecule inhibitors of key enzymes known to be centrally involved in the activation of the targeted pathway of complement.

<u>Lectin Pathway / MASP 2</u>

MASP-2 is a novel pro-inflammatory protein target that is the effector enzyme of the lectin pathway and is required for the function of this pathway. We are developing antibodies and small-molecule inhibitors of MASP-2 as potential therapeutics for diseases in which the lectin pathway has been shown to contribute to significant tissue injury and pathology. When not treated, these diseases are typically characterized by significant end-organ damage, such as kidney or central nervous system injury. Importantly, inhibition of MASP-2 has been demonstrated not to interfere with the antibody-dependent classical complement activation pathway, a critical component of the acquired immune response to infection.

The lead product candidate in our pipeline of complement-targeted therapeutics is narsoplimab (OMS721), a proprietary, patented human monoclonal antibody targeting MASP-2, the key activator of the lectin pathway of complement. As previously disclosed, in March 2025, the Company resubmitted to the U.S. Food and Drug Administration ("FDA") the biologics license application ("BLA") seeking regulatory approval for narsoplimab in hematopoietic stem cell transplant-associated thrombotic microangiopathy ("TA-TMA"). The resubmission was accepted for review by FDA as a class 2 resubmission and, pursuant to the Prescription Drug User Fee Act ("PDUFA"), was assigned an initial target action date for the FDA decision of September 25, 2025. Following the submission of information in response to a request from FDA, FDA informed us that the PDUFA date has been extended to December 26, 2025. We expect that FDA will meet this PDUFA date. All analyses requested by FDA as part of its review have been consistent with and have provided statistically significant support of narsoplimab's benefit demonstrated in the analyses submitted as part of the BLA resubmission.

In June 2025, we submitted a Marketing Authorization Application ("MAA") for narsoplimab for the treatment of TA-TMA in the European Union. The European Medicines Agency ("EMA") completed validation of the narsoplimab MAA, which confirms that the submission is accepted and starts the formal review process by EMA's Committee for Medicinal Products for Human Use. We expect an opinion on the MAA in mid-2026.

As with any BLA or MAA, there can be no guarantee that FDA or the EMA will complete their respective reviews within a given timeframe, or that the Company's BLA or MAA will ultimately be approved.

Our pipeline also includes OMS1029, our long-acting antibody targeting MASP-2 which we expect will be well-suited to indications requiring long-term, chronic administration. In addition, we have a program focused on development of an orally administered small-molecule MASP-2 inhibitor. In the first quarter of 2025 we determined to pause most development activities in our OMS1029 and MASP-2 small-molecule development programs to preserve available capital for narsoplimab and other prioritized programs.

<u>Alternative Pathway / MASP-3</u>

Our pipeline of clinical-stage complement-targeted therapeutic candidates also includes zaltenibart (OMS906), a proprietary, patented monoclonal antibody targeting MASP-3, the key activator of the alternative pathway of complement. We believe zaltenibart has the potential to treat a wide range of alternative pathway-related diseases and that its attributes favorably differentiate zaltenibart from other marketed and in-development alternative pathway inhibitors.

Our clinical development of zaltenibart has been focused on PNH and C3G. We have substantially completed two Phase 2 clinical trials evaluating zaltenibart and have an ongoing open label extension study to assess the long-term efficacy and safety of zaltenibart in PNH patients who have completed either of the two Phase 2 clinical trials. We also have a small, ongoing Phase 2 study evaluating zaltenibart in C3G.

On October 10, 2025, we entered into an Asset Purchase and License Agreement (the "APLA") with Novo Nordisk Health Care AG ("Novo Nordisk"), pursuant to which Novo Nordisk will receive exclusive global rights in all indications to develop and commercialize zaltenibart in consideration of certain upfront and contingent payments payable to us (the "Transaction") upon the Closing (as defined below). Our ongoing and planned clinical programs for zaltenibart will be transitioned to Novo Nordisk following the Closing of the Transaction throughout which we will provide certain transition services to Novo Nordisk. Subject to the satisfaction or waiver of the foregoing conditions and the other terms and conditions contained in the APLA, the Transaction is expected to close in the fourth quarter of 2025.

Following the Closing and during the term of the APLA, we and our affiliates will be restricted from exploiting products directed to MASP-3 and certain other alternative pathway targets, subject to certain exceptions for retained preclinical program rights (outside of zaltenibart), products of an acquirer, and non-competing indications. We will retain rights to continue development of our existing MASP-3 small-molecule program, including the ability to develop and commercialize small-molecule inhibitors with limited indication-related restrictions. We will also retain rights to our "grandfathered" MASP-3 antibodies, with temporal and indication restrictions on commercialization and for use in advancing our small-molecule therapeutics.

See *2025 Asset Purchase and License Agreement* below for further information regarding the Transaction.

*PDE7 Inhibitor Programs*

Our PDE7 inhibitor program, which we refer to as OMS527, comprises multiple PDE7 inhibitor compounds and is based on our discoveries of previously unknown links between PDE7 and any addiction or compulsive disorder, and between PDE7 and any movement disorders. In April 2023, we were awarded a grant from the National Institute on Drug Abuse ("NIDA"), part of the National Institutes of Health, to develop our lead orally administered PDE7 inhibitor compound for the treatment of cocaine use disorder. NIDA awarded the grant to us for a total of $6.24 million over three years, of which we expensed $2.1 million and have claimed and received $1.6 million of funding to date. The grant is intended to support preclinical cocaine interaction/toxicology studies to assess safety of the therapeutic candidate in the presence of concomitant cocaine administration, as well as an in-patient, placebo-controlled clinical study evaluating the safety and efficacy of OMS527 in adult cocaine users who receive concurrent intravenous cocaine. The preclinical studies, which were designed with NIDA toxicologists, have been successfully completed with no safety findings and provide drug-interaction safety data in support of the planned in-patient human study of OMS527 in cocaine users. FDA has requested that we provide additional preclinical information prior to initiating the clinical in-patient study in cocaine users, which we are targeting for the second half of 2026.

*Preclinical Programs - Oncology Platform*

We are developing a portfolio of signaling-driven immunomodulators, oncotoxins, and an adoptive T-cell technology combined with an immunostimulator that, unlike other cellular therapy approaches requires no cellular engineering, may reduce manufacturing costs and timelines, and may maintain an enhanced anti-cancer immune response through subsequent repetitive and simple therapeutic administrations.

We continue on a limited basis to progress pre-clinical studies within our novel oncology program, including IND-enabling studies in our program to develop novel, proprietary large molecule therapeutics designed to target and kill only dividing cancer cells. Acute myeloid leukemia ("AML") is the lead indication for development in this program, which we refer to as OncotoX-AML. In preclinical models both *in vivo* – in immunocompromised mice with human tumors – and *in vitro*, our potential AML therapeutic has consistently demonstrated superior efficacy to current AML standard of care treatments and has been well-tolerated in preliminary, preclinical tolerability studies. A non-human primate safety study is underway, with encouraging results to date. Our OncotoX-AML therapeutic also shows broad potential application across AML regardless of genetic mutation, including TP53, NPM1, KMT2A, and FLT3.

In April 2025, we established the Omeros Oncology Clinical Steering Committee to help advance our OncotoX-AML program. The clinical steering committee is composed of leaders in AML treatment and research at the premier cancer centers across the United States. These experts in the treatment of AML are expected to help guide clinical development of our potential AML therapeutic. IND-enabling work is ongoing with an estimated timeline to clinical entry of 18-24 months.

We continue to confirm our results and to generate new data which we expect will contribute to our intellectual property position.

------

[**Table of Contents**](#toc)

*Preclinical Programs - T-CAT*

We are also advancing our Targeted Complement Activating Therapy ("T-CAT") platform – a new class of pathogen-targeting recombinant antibodies intended for broad action against bacteria, fungi, viruses, and parasites. T-CAT is designed to harness complement activation to kill pathogens directly, which represents a novel approach to infectious disease treatment.

As preclinical animal data continue to accumulate across multiple pathogen classes and species, we believe that T-CAT demonstrates potential against multidrug-resistant organisms ("MDROs"). Effective MDRO therapies remain one of the most urgent and unmet needs in medicine, and we believe that T-CAT has the potential to address this need without contributing to drug resistance.

*2025 Asset Purchase and License Agreement*

On October 10, 2025, we entered into the APLA with Novo Nordisk, pursuant to which Novo Nordisk will receive exclusive global rights in all indications to develop and commercialize zaltenibart and certain related monoclonal antibodies and antigen-binding fragments (collectively, the "Compounds"), and related pharmaceutical products ("Products") upon the Closing. Under the APLA, we agreed to sell and transfer, and Novo Nordisk agreed to purchase and assume, certain assets and liabilities related to the Compounds and Products, and the parties agreed to grant and receive certain intellectual property licenses, as further described below.

Pursuant to the terms and subject to the conditions of the APLA, we are eligible to receive $340.0 million in upfront and near-term milestone payments, of which $240.0 million is to be received by us at the closing of the Transaction (the "Closing"). Beyond the $340.0 million, we can receive (i) an additional $410.0 million in one-time milestone payments upon the first achievement by Novo Nordisk or its affiliates or sublicensees of each of the development and approval milestone events as set forth in the APLA and (ii) up to $1.3 billion in one-time milestone payments upon the first achievement by Novo Nordisk or its affiliates or sublicensees of certain sales-based milestone events as set forth in the APLA. We are also eligible under the APLA to receive tiered royalties on annual net sales of Products at percentage rates ranging from high single digit to high teens, subject to reduction in certain circumstances, as set forth in the APLA.

*2024 Term Loan and Repurchase of 2026 Notes*

On June 3, 2024 (the "Closing Date"), we, with certain subsidiaries, as guarantors, entered into the Credit and Guaranty Agreement (the "Credit Agreement") with Athyrium Capital Management, LP and certain funds managed by Highbridge Capital Management, LLC, as lenders (together with additional lenders from time to time, the "Lenders") and Wilmington Savings Fund Society, FSB, as administrative agent and collateral agent. The Credit Agreement provides for a senior secured term loan facility of $67.1 million (the "Term Loan").

In 2024, we used the $67.1 million Term Loan proceeds, along with $21.7 million of cash on hand to repurchase from the Lenders $118.1 million aggregate principal amount of our existing 5.25% convertible senior notes due on February 15, 2026 (the "2026 Notes"), which resulted in a $51.0 million reduction in our total outstanding debt. The $29.3 million difference between the total consideration paid at closing of $88.8 million and the $118.1 million aggregate principal amount of the 2026 Notes was recorded as a premium (i.e., an increase) on the Term Loan. The premium is being amortized as both a non-cash reduction of long-term debt in the condensed consolidated balance sheets and interest expense in the condensed consolidated statement of operations and comprehensive loss over the duration of the Term Loan.

All indebtedness outstanding under the Credit Agreement is guaranteed by certain of our direct and indirect subsidiaries, other than certain foreign subsidiaries that are not material (we and the guarantors, collectively, the "Credit Parties"). Pursuant to a Pledge and Security Agreement, dated June 3, 2024, the indebtedness under the Credit Agreement is secured by a first-priority security interest in and lien on substantially all tangible and intangible property of the Credit Parties, subject to customary exceptions, and excluding royalty interests in OMIDRIA and certain related rights.

Amounts outstanding under the Term Loan accrue interest at an adjusted term secured overnight financing rate, ("adjusted term SOFR") (with a 3.00% floor) plus 8.75% per annum, payable quarterly. The Credit Agreement has a scheduled maturity date of June 3, 2028. As of September 30, 2025, the contractual interest rate on the Term Loan was 13.02%.

The Credit Agreement contains certain customary default provisions, representations and warranties and affirmative and negative covenants, including a covenant for the Credit Parties to maintain at all times unrestricted cash, cash equivalents and short-term investments of at least $25.0 million in accounts subject to control agreements, and a covenant limiting the use of cash for open market or privately negotiated repurchases of any outstanding 2026 Notes.

The Credit Agreement requires mandatory prepayments of outstanding Term Loans in an amount equal to 60% of the net cash proceeds (excluding research and development and certain other milestone-based payments) received by the Credit Parties from asset sales and licenses, including the Transaction with Novo Nordisk.

The Transaction with Novo Nordisk is expected to close in the fourth quarter of 2025 and would provide us with $240.0 million in upfront cash, a portion of which will be applied to the mandatory repayment of the entire $67.1 million principal outstanding under the Term Loan, along with a 5.0% prepayment premium, certain expenses and accrued and unpaid interest. The repayment will result in the release in full of all liens and covenants thereunder including the $25.0 million minimum liquidity covenant.

See "Note 6 — Debt" in the Notes to Condensed Consolidated Financial Statements included elsewhere in this Quarterly Report on Form 10-Q for further details.

*Convertible Note Exchange and Equitization Transaction* 

On May 14, 2025, we completed with a limited number of holders of the 2026 Notes the exchange (the "Convertible Note Exchange") of $70.8 million aggregate principal amount of our 2026 Notes on a one-for-one basis for newly-issued convertible senior notes maturing on June 15, 2029 (the "2029 Notes").

On May 12, 2025, we entered into note conversion agreements (each, a "Note Conversion Agreement") with two holders of the 2026 Notes to convert $10.0 million aggregate principal amount of 2026 Notes into shares of our common stock (the "Equitization Transaction") in three tranches. As of September 30, 2025, we completed the Equitization Transaction, resulting in the issuance of an aggregate of 2,819,866 shares to the two holders.

The aggregate principal balance of our 2026 Notes was reduced from $97.9 million to $17.1 million as a result of the Convertible Note Exchange and Equitization Transaction. No new cash was received as a result of these transactions.

We also retain all potential future value of the capped call purchased in connection with the issuance of the 2026 Notes covering all shares underlying the aggregate principal amount of the originally issued 2026 Notes. The capped call will expire on the maturity date of the 2026 Notes.

See "Note 1 — Organization and Basis of Presentation" and "Note 6 — Debt" in the Notes to Condensed Consolidated Financial Statements included elsewhere in this Quarterly Report on Form 10-Q for further details.

**Financial Summary** 

As of September 30, 2025, we had cash, cash equivalents and short-term investments of $36.1 million. For the nine months ended September 30, 2025, our cash used in operations was $76.3 million and included a net loss for the nine months ended September 30, 2025 of $89.8 million.

We expect to receive an upfront cash payment, of $240.0 million upon Closing of the Transaction with Novo Nordisk, a portion of which will be applied to the full and immediate repayment of our $67.1 million Term Loan along with a related prepayment premium, certain expenses, and accrued and unpaid interest. Repayment will result in termination of the Credit Agreement and the release in full of all liens and covenants thereunder including the covenant whereby we must maintain a minimum of $25.0 million of unrestricted cash, cash equivalents and short-term investments at all times.

See "Note 1 — Organization and Basis of Presentation, *Liquidity and Capital Resources*" in the Notes to the Condensed Consolidated Financial Statements included elsewhere in this Quarterly Report on Form 10-Q for further details.

*OMIDRIA Sale and Royalty Monetization Transactions*

We previously developed and commercialized OMIDRIA<sup>®</sup> (phenylephrine and ketorolac intraocular solutions) 1%/0.3%, which is approved by FDA for use during cataract surgery or intraocular lens replacement to maintain pupil size by preventing intraoperative miosis (pupil constriction) and to reduce postoperative ocular pain. We marketed OMIDRIA in the U.S. from the time of its commercial launch in 2015 until December 2021.

On December 23, 2021, we closed on an Asset Purchase Agreement (the "Asset Purchase Agreement") with Rayner Surgical Inc. ("Rayner") for the sale of OMIDRIA and related business assets, which we recorded as an OMIDRIA contract asset on our condensed consolidated balance sheet. The results of OMIDRIA activities, which includes royalties earned and the effect of any remeasurement adjustments, are classified as discontinued operations in our condensed consolidated statements of operations and comprehensive loss. We currently earn royalties from Rayner on all U.S. based net sales of OMIDRIA through December 31, 2031 at a royalty rate of 30%. Our royalty rate would be reduced to 10% upon the occurrence of certain events described in the Asset Purchase Agreement, including during any specific period in which OMIDRIA is no longer eligible for separate payment (i.e., becomes included in the packaged payment rate for the surgical procedure) under Medicare Part B, or in certain circumstances involving entry of generic competition for OMIDRIA. We are entitled to earn royalties until the expiration or termination of the last issued and unexpired U.S. patent, which we expect to occur no earlier than 2035. Pursuant to legislation enacted in late 2022, we also expect separate payment for OMIDRIA under Medicare Part B to extend until at least January 1, 2028.

We previously sold to DRI Healthcare Acquisition LP ("DRI") our future U.S. based OMIDRIA royalty receipts through December 31, 2031 which we record as an OMIDRIA royalty obligation on our condensed consolidated balance sheet. All U.S. based royalties through December 31, 2031 are remitted by Rayner to an escrow account established by Omeros, from which payments are made to DRI. We retain the rights to receive all ex-U.S. royalties through December 31, 2031 and royalties on global net sales of OMIDRIA after this date, including royalties on U.S. OMIDRIA net sales. Interest expense on the OMIDRIA royalty obligation is recorded as a component of continuing operations.

For further details, see "Note 2 – Significant Accounting Policies, *Discontinued Operations* and *OMIDRIA Royalty Obligations*," and "Note 8 — OMIDRIA Royalty Obligation" in the Notes to the Condensed Consolidated Financial Statements included elsewhere in this Quarterly Report on Form 10-Q.

------

[**Table of Contents**](#toc)

**Results of Operations** 

*Research and Development Expenses* 

Our research and development expenses can be divided into three categories: direct external expenses, which include clinical research and development and preclinical research and development activities; internal overhead and other expenses; and stock-based compensation expense. Direct external expenses consist primarily of expenses incurred pursuant to agreements with third-party manufacturing organizations prior to receiving regulatory approval for a product candidate, contract research organizations, clinical trial sites, collaborators, licensors and consultants. Preclinical research and development includes costs prior to beginning Phase 1 studies in human subjects. Internal overhead and other expenses primarily consist of costs for personnel, overhead, rent, utilities, and depreciation. Our accounting policy is to expense all manufacturing costs related to product candidates until regulatory approval is reasonably assured in either the U.S. or European Union.

The following table illustrates our expenses associated with these activities:

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **Three Months Ended** | **Three Months Ended** | **Nine Months Ended** | **Nine Months Ended** |
|  | **September 30,** | **September 30,** | **September 30,** | **September 30,** |
|  | **2025** | **2024** | **2025** | **2024** |
|  | **(In thousands)** | **(In thousands)** | **(In thousands)** | **(In thousands)** |
| Research and development expenses: |  |  |  |  |
| Direct external expenses: |  |  |  |  |
| Clinical research and development: |  |  |  |  |
| MASP-3 program - OMS906 (zaltenibart) | $2176 | $5285 | $14531 | $18711 |
| MASP-2 program - OMS721 (narsoplimab) | 2047 | 4072 | 8102 | 32760 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PDE7 program - (NIDA) | 143 | 35 | 678 | 63 |
| MASP-2 program - OMS1029 and other | 74 | 1198 | 469 | 3494 |
| Total clinical research and development | 4440 | 10590 | 23780 | 55028 |
| Preclinical research and development | 818 | 1651 | 3179 | 5020 |
| Total direct external expenses | 5258 | 12241 | 26959 | 60048 |
| Internal overhead and other expenses | 9881 | 10780 | 32084 | 33009 |
| Stock-based compensation expenses | 856 | 1063 | 2807 | 3146 |
| Total research and development expenses | $15995 | $24084 | $61850 | $96203 |

---

For the three months ended September 30, 2025, clinical research and development expenses decreased $6.2 million. We began initiating clinical trial sites in our Phase 3 program for zaltenibart in PNH during the first quarter of 2025; however, based on considerations of capital availability and the anticipated ramp up in spending on those trials, we determined in the second quarter of 2025 to pause this program temporarily in order to prioritize the use of our available capital to other programs. Clinical research activity also decreased in the third quarter due to the coincidental wind down of several of our Phase 2 zaltenibart studies. Additionally, we incurred non-recurring expenses related to the wind-down of our IgAN program in the prior year and consultancy charges related to BLA submission for narsoplimab in TA-TMA.

For the nine months ended September 30, 2025, clinical research and development expenses decreased $31.2 million primarily due to the inclusion in the prior year period of drug substance manufacturing expenses of $17.8 million for narsoplimab and $4.3 million for zaltenibart. In addition, we incurred $4.7 million of expenses in the prior year period related to the wind-down of our narsoplimab IgAN program.

We expect research and development expenses in the fourth quarter of 2025 to be comparable to the third quarter of this year.

------

[**Table of Contents**](#toc)

At this time, we are unable to estimate with certainty the longer-term costs we will incur in the continued development of our product candidates due to the inherently unpredictable nature of our preclinical and clinical development activities. Clinical development timelines, the probability of success, and development costs can differ materially as new data become available and as expectations change. Our future research and development expenses will depend, in part, on the preclinical or clinical success of each product candidate as well as ongoing assessments of each program's commercial potential. In addition, we cannot forecast with precision which product candidates, if any, may be subject to future collaborations, when such arrangements will be secured, if at all, and to what degree such arrangements would affect our development plans and capital requirements.

We are required to expend substantial resources in the development of our product candidates due to the lengthy process of completing clinical trials and seeking regulatory approval. Any failure or delay in completing clinical trials, or in obtaining regulatory approvals, could delay our generation of product revenue and increase our research and development expenses.

*Selling, General and Administrative Expenses* 

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **Three Months Ended** | **Three Months Ended** | **Nine Months Ended** | **Nine Months Ended** |
|  | **September 30,** | **September 30,** | **September 30,** | **September 30,** |
|  | **2025** | **2024** | **2025** | **2024** |
|  | **(In thousands)** | **(In thousands)** | **(In thousands)** | **(In thousands)** |
| Selling, general and administrative expenses: |  |  |  |  |
| Selling, general and administrative expenses, excluding stock-based compensation expense | $9312 | $9745 | $28213 | $32474 |
| Stock-based compensation expense | 1085 | 1578 | 3652 | 4921 |
| Total selling, general and administrative expenses | $10397 | $11323 | $31865 | $37395 |

---

Total selling, general and administrative expenses, excluding stock-based compensation, decreased by $4.3 million for the nine months ended September 30, 2025, compared to the same period in the prior year. The decrease was primarily due to a reduction in employee compensation expenses in the current year.

The $0.5 million and $1.3 million decrease in stock-based compensation for the three and nine months ended September 30, 2025, respectively, compared to the same periods in the prior year is due to the valuation and timing of the vesting of employee stock options.

We expect selling, general and administrative expenses in the fourth quarter of 2025 to be higher than those in the third quarter of this year, primarily due to increased marketing expenses associated with the anticipated launch of narsoplimab in TA-TMA, if approved by regulatory authorities.

------

[**Table of Contents**](#toc)

*Interest Expense*

Interest expense, net of premiums, discounts, issuance costs and remeasurement adjustments is shown below:

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **Three Months Ended** | **Three Months Ended** | **Nine Months Ended** | **Nine Months Ended** |
|  | **September 30,** | **September 30,** | **September 30,** | **September 30,** |
|  | **2025** | **2024** | **2025** | **2024** |
|  | **(In thousands)** | **(In thousands)** | **(In thousands)** | **(In thousands)** |
| OMIDRIA royalty obligation |  |  |  |  |
| Pass through interest remitted to administrative agent | $4759 | $5585 | $15045 | $15231 |
| Non-cash remeasurement adjustment | (22292) | (3359) | (34170) | (1553) |
| Interest expense, net of remeasurement on OMIDRIA royalty obligation | (17533) | 2226 | (19125) | 13678 |
| 2026 Notes |  |  |  |  |
| Contractual interest expense | 248 | 1284 | 2323 | 6488 |
| Amortization of debt discount and issuance costs | 20 | 144 | 260 | 713 |
| Interest expense on 2026 Notes | 268 | 1428 | 2583 | 7201 |
| Term Loan |  |  |  |  |
| Contractual interest expense | 2258 | 2433 | 6723 | 3147 |
| Amortization of debt premium and issuance costs | (1512) | (2060) | (4727) | (2659) |
| Interest expense on Term Loan | 746 | 373 | 1996 | 488 |
| 2029 Notes |  |  |  |  |
| Contractual interest expense | 1682 |  | 2541 |  |
| Amortization of debt discount and issuance costs | 1458 |  | 2206 |  |
| Interest expense on 2029 Notes | 3140 |  | 4747 |  |
| Finance leases and other | 24 | 25 | 113 | 131 |
| Total interest expense, net of remeasurement adjustments and other | $(13355) | $4052 | $(9686) | $21498 |

---

Interest on our OMIDRIA royalty obligation is calculated under the effective interest method and represents a portion of the royalties remitted by Rayner to our administrative agent, Wilmington Savings Fund Society, FSB, along with principal. Pass through interest paid to DRI is offset by non-cash remeasurement adjustments taken to properly reflect the OMIDRIA royalty obligation for changes in probable cash flows on our future expected Rayner royalties.

Contractual interest expense is comprised of cash interest paid during the year and the net change in accrued interest. Amortization of debt discounts, premiums, and issuance costs are reflected as non-cash interest expense. Debt discounts on the 2026 Notes and 2029 Notes are accretive whereas the premium on the Term Loan is deducted from contractual interest expense.

For the three months ended September 30, 2025, interest expense decreased $17.5 million compared to the same period in 2024. The decrease primarily relates to $22.3 million of non-cash remeasurement costs on the OMIDRIA royalty obligation to reflect a change in forecasted OMIDRIA cash flows from Rayner. Excluding the OMIDRIA royalty obligation and any non-cash amortization of debt discount, premium, or issuance costs, contractual interest expense increased $0.5 million primarily due to incurring a full quarter of interest expense on the 2029 Notes issued in May 2025 at a higher rate of interest than the 2026 Notes.

For the nine months ended September 30, 2025, interest expense decreased $31.2 million compared to the same period in 2024. The decrease primarily relates to $32.6 million of non-cash remeasurement costs on the OMIDRIA royalty obligation to reflect a change in forecasted OMIDRIA cash flows from Rayner. Excluding the OMIDRIA royalty obligation and any non-cash amortization of debt discount, premium, or issuance costs, contractual interest expense increased $1.9 million due to (i) incurring nine months of interest on our Term Loan compared to four months of interest in the prior year period as the Term Loan was issued in June 2024 and (ii) incurring interest on the 2029 Notes at a higher coupon rate of interest than the 2026 Notes for which they were exchanged.

For further information see "Note 6 — Debt" and "Note 8 – OMIDRIA Royalty Obligation" in the Notes to Condensed Consolidated Financial Statements included elsewhere in this Quarterly Report on Form 10-Q.

We expect that interest expense for the fourth quarter of 2025 will be higher compared to the third quarter, under the assumption that there is no remeasurement adjustment to the OMIDRIA contract royalty obligation.

*Interest and Other Income*

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **Three Months Ended** | **Three Months Ended** | **Nine Months Ended** | **Nine Months Ended** |
|  | **September 30,** | **September 30,** | **September 30,** | **September 30,** |
|  | **2025** | **2024** | **2025** | **2024** |
|  | **(In thousands)** | **(In thousands)** | **(In thousands)** | **(In thousands)** |
| Interest and other income | $616 | $2346 | $2979 | $9008 |

---

Interest and other income decreased $1.7 million and $6.0 million, respectively, for the three and nine months ended September 30, 2025 as compared to the same periods in 2024 primarily due to holding a lower average cash and investment balance than in the prior year periods.

We expect interest and other income for the fourth quarter of 2025 to be slightly higher compared to the third quarter of this year due to higher anticipated cash balances.

*Loss on early extinguishment of 2026 convertible senior notes*

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **Three Months Ended** | **Three Months Ended** | **Nine Months Ended** | **Nine Months Ended** |
|  | **September 30,** | **September 30,** | **September 30,** | **September 30,** |
|  | **2025** | **2024** | **2025** | **2024** |
|  | **(In thousands)** | **(In thousands)** | **(In thousands)** | **(In thousands)** |
| Loss on early extinguishment of convertible senior notes | $— | $— | $(2968) | $— |

---

In May 2025, we exchanged $70.8 million principal amount of 2026 Notes for the same principal of 2029 Notes and entered into agreements to equitize $10.0 million of 2026 Notes, realizing a $3.0 million non-cash loss on extinguishment. The extinguishment reflects marking-to-market the 2029 Notes and the expensing of capitalized debt issuance costs on the retired portion of the 2026 Notes.

*Net loss on change in fair value of financial instruments*

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **Three Months Ended** | **Three Months Ended** | **Nine Months Ended** | **Nine Months Ended** |
|  | **September 30,** | **September 30,** | **September 30,** | **September 30,** |
|  | **2025** | **2024** | **2025** | **2024** |
|  | **(In thousands)** | **(In thousands)** | **(In thousands)** | **(In thousands)** |
| Net loss on change in fair value of financial instruments | $(8822) | $— | $(680) | $— |

---

Our embedded derivatives comprise call and put options related to our 2029 Notes and Term Loan. The $8.8 million increase in net loss for the three months ended September 30, 2025 reflects (i) a $7.1 million net liability increase in the fair value of our 2029 Notes embedded derivative reflecting the option of holders to convert their notes into shares of common stock, which is affected by an increase in our stock price, and (ii) a $1.7 million net liability change in our Term Loan embedded derivative reflecting a greater likelihood of a prepayment occurring due to signing of the APLA and the anticipated Closing of the Transaction with Novo Nordisk.

The $0.7 million increase in net loss for the nine months ended September 30, 2025 reflects a $1.8 million net liability change in our Term Loan embedded derivative, offset by a $0.8 million net liability decrease in our 2029 embedded derivative and a $0.3 million remeasurement of the share-settled liability.

*Discontinued operations and the OMIDRIA contract royalty asset*

Net income from OMIDRIA discontinued operations, net of tax is shown below:

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **Three Months Ended** | **Three Months Ended** | **Nine Months Ended** | **Nine Months Ended** |
|  | **September 30,** | **September 30,** | **September 30,** | **September 30,** |
|  | **2025** | **2024** | **2025** | **2024** |
|  | **(In thousands)** | **(In thousands)** | **(In thousands)** | **(In thousands)** |
| Interest earned on OMIDRIA contract royalty asset | $3682 | $4210 | $11521 | $12824 |
| Remeasurement adjustments | (13403) | 731 | (16383) | 7384 |
| Other income (loss), net | 44 | (60) | (250) | 423 |
| Ex-US royalties | 3 |  | 9 |  |
| Net income (loss) from discontinued operations, net of tax | $(9674) | $4881 | $(5103) | $20631 |

---

Net income (loss) from discontinued operations decreased $14.6 million and $25.7 million, respectively, for the three and nine months ended September 30, 2025 due to remeasurement of the OMIDRIA contract royalty asset. The decrease was primarily attributable to a remeasurement of our OMIDRIA contract royalty asset to reflect lower forecasted sales of OMIDRIA.

------

[**Table of Contents**](#toc)

The following schedule presents a roll forward of the OMIDRIA contract royalty asset (in thousands):

---

| | |
|:---|:---|
| OMIDRIA contract royalty asset at December 31, 2024 | $153349 |
| &nbsp;&nbsp;&nbsp; Royalties earned | (24404) |
| &nbsp;&nbsp;&nbsp; Interest earned on OMIDRIA contract royalty asset | 11521 |
| &nbsp;&nbsp;&nbsp; Remeasurement adjustments | (16383) |
| OMIDRIA contract royalty asset at September 30, 2025 | $124083 |

---

**Financial Condition – Liquidity and Capital Resources** 

As of September 30, 2025, we had cash, cash equivalents, and short-term investments of $36.1 million. For the nine months ended September 30, 2025, our cash used in operations was $76.3 million and included a net loss for the period of $89.8 million.

Pursuant to a covenant in the Credit Agreement entered into on June 3, 2024, we must maintain $25.0 million of unrestricted cash, cash equivalents, and short-term investments at all times. We have maintained a balance of unrestricted cash, cash equivalents, and short-term investments greater than $25.0 million and at no time during the quarter or through the date of issuance of these condensed consolidated financial statements have we been in violation of any of our debt covenants.

In recent years, Omeros has incurred net losses from continuing operations and negative cash flows from operations.

We will be entitled to receive an upfront cash payment of $240.0 million upon Closing of the Transaction with Novo Nordisk, which is expected to occur in the fourth quarter of 2025. As such, the Closing will result in the mandatory prepayment of all outstanding obligations under our Credit Agreement and a portion of the proceeds will be applied at the Closing to fund full repayment of the $67.1 million outstanding principal amount of Term Loan, along with a 5.0% prepayment premium, certain expenses, and accrued and unpaid interest. Repayment will result in termination of the Credit Agreement and the release in full of all liens and covenants thereunder.

On July 28, 2025, in a registered direct offering, we issued and sold to entities managed by Polar Asset Management Partners 5,365,853 shares of our common stock at a price of $4.10 per share, representing a 14% premium to the closing price of our common stock on the date of the definitive agreement for the purchase of the shares. We received $20.3 million in cash proceeds net of offering expenses.

Further, we have a sales agreement pursuant to an at-the-market ("ATM") equity offering facility through which we may, from time to time, offer and sell shares of our common stock equaling an aggregate amount of up to $150.0 million. During the three and nine months ended September 30, 2025, we received $9.0 million and $15.3 million, respectively, of net proceeds from the sale of our common stock through the ATM facility and have received $3.6 million subsequent to September 30, 2025.

If the ATM facility is needed but inaccessible, we are not able to close the Transaction with Novo Nordisk when anticipated, or we are not able to obtain debt and/or royalty-related financing and/or partnering funding in connection with a near-term regulatory approval of narsoplimab, it would have a significant negative impact on our financial condition. For purposes of determining available capital resources, any future royalty and/or milestone receipts are excluded. We have taken steps to manage our operating expenses and reduce our projected cash requirements by delaying clinical trials and reducing selected research and development efforts. Should it be necessary, we may determine to further reduce or delay these or other aspects of our operations and/or implement other restructuring activities. Furthermore, as we currently do not have an ongoing source of revenue sufficient to cover our operating costs, should the need arise to raise further capital for our operations, we may pursue public and private offerings of our equity securities, debt financings, future royalty sales, or other strategic transactions, which may include licensing or selling a portion or all of one or more of our existing technologies.

The conditions described above, including the need to raise additional capital, when evaluated in accordance with the relevant accounting literature, raise substantial doubt with respect to our ability to meet our obligations through one year from the issuance of the Company's condensed consolidated financial statements. Our ability to continue as a going concern will require us to generate positive cash flow from operations, obtain additional financing, enter into strategic alliances, and/or sell assets, and this determination is made without considering any such potential future activities. The accompanying condensed consolidated financial statements do not include any adjustments to reflect the possible future effects on the recoverability and classification of assets or the amounts and classification of liabilities that may result from uncertainty related to our ability to continue as a going concern or to the expected Closing of the Transaction with Novo Nordisk.

*Cash Flow Data* 

---

| | | |
|:---|:---|:---|
|  | **Nine Months Ended** | **Nine Months Ended** |
|  | **September 30,** | **September 30,** |
|  | **2025** | **2024** |
|  | **(In thousands)** | **(In thousands)** |
| **<u>Selected cash flow data</u>** |  |  |
| Cash provided by (used in): |  |  |
| &nbsp;&nbsp;&nbsp; Operating activities | $(76252) | $(119823) |
| &nbsp;&nbsp;&nbsp; Investing activities | $52977 | $47263 |
| &nbsp;&nbsp;&nbsp; Financing activities | $22270 | $66976 |

---

------

[**Table of Contents**](#toc)

Operating Activities. Net cash used in operating activities for the nine months ended September 30, 2025 decreased by $43.6 million as compared to the same period in 2024, driven primarily by a $35.7 million decrease in net loss and a $17.4 million increase in accounts payable, partially offset by $9.8 million of non-cash items, which is primarily comprised of remeasurement adjustments on forecasted OMIDRIA royalties affecting both the OMIDRIA contract royalty asset and OMIDRIA royalty obligation.

Investing Activities. Cash flows provided by investing activities primarily reflects cash used to purchase short-term investments and proceeds from the sale of those investments. This frequently causes a shift between our cash, cash equivalents, and short-term investment balances. As we manage our usage with respect to total cash, cash equivalents, and short-term investments, we do not consider fluctuations in cash flows from investing activities to be important to the understanding of our liquidity and capital resources.

Net cash provided by investing activities during the nine months ended September 30, 2025 increased by $5.7 million, reflecting the timing of purchase of investments from proceeds received on maturities and sales.

Financing Activities. Net cash provided by financing activities for the nine months ended September 30, 2025 decreased by $44.7 million, primarily due to the change in financing activities between the current year and the prior year. In the current year, we received proceeds from our registered direct offering from Polar of $20.3 million and ATM proceeds of $15.3 million. In the prior year, we received $115.5 million in cash from DRI related to the sale of expanded OMIDRIA royalties in February 2024, which was partially offset by repurchases of $21.2 million in aggregate principal amount of our 2026 Notes and $11.9 million of shares of our common stock.

**Contractual Obligations and Commitments** 

Our future minimum contractual commitments and obligations were reported in our Annual Report on Form 10-K for the year ended December 31, 2024. Other than the following, our future minimum contractual obligations and commitments have not changed materially from the amounts previously reported. See "Note 10 — Commitments and Contingencies" in the Notes to the Condensed Consolidated Financial Statements included elsewhere in this Quarterly Report on Form 10-Q.

*Operating Leases*

Our lease for our office and laboratory space ends in November 2027. We have two options to extend the lease term by five years each. In addition, we carry various finance lease obligations for laboratory and office equipment. As of September 30, 2025, the remaining aggregate non-cancelable rent payable under the initial term of the lease, excluding common area maintenance and related operating expenses, is $15.1 million.

*Convertible Senior Notes and Long-Term Debt*

See "Note 6 — Debt" in the Notes to the Condensed Consolidated Financial Statements included elsewhere in this Quarterly Report on Form 10-Q.

*OMIDRIA Royalty Obligation* 

See "Note 8 — OMIDRIA Royalty Obligation" in the Notes to the Condensed Consolidated Financial Statements included elsewhere in this Quarterly Report on Form 10-Q.

*Goods and Services Contracts, Development Milestones and Product Royalties*

See "Note 10 — Commitment and Contingencies" in the Notes to the Condensed Consolidated Financial Statements included elsewhere in this Quarterly Report on Form 10-Q.

------

[**Table of Contents**](#toc)

**Critical Accounting Policies and Significant Judgments and Estimates**

There have not been any material changes in our critical accounting policies and significant judgments and estimates as disclosed in Part II, Item 7, "Management's Discussion and Analysis of Financial Condition and Results of Operations" included in our Annual Report on Form 10-K for the year ended December 31, 2024, which was filed with the SEC on March 31, 2025 except as what we have disclosed in the notes to our financial statements regarding embedded derivatives. For further details see "Note 2 — Significant Accounting Policies" in the Notes to the Condensed Consolidated Financial Statements included elsewhere in this Quarterly Report on Form 10-Q.

**ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK**

Our exposure to market risk is primarily confined to our investment securities, debt instruments and embedded derivatives.

***Cash, Cash Equivalents and Short-Term Investments***

The primary objective of our investment activities is to preserve our capital to fund operations, and we do not enter into financial instruments for trading or speculative purposes. We also seek to maximize income from our investments without assuming significant risk. As of September 30, 2025, we had cash, cash equivalents, and short-term investments of $36.1 million. In accordance with our investment policy, we invest funds in high credit quality securities such as money market funds, certificates of deposit and U.S. treasury bills to limit credit risk. The money market funds in our investment portfolio are not leveraged and are classified as available-for-sale. We currently do not hedge interest rate exposure. Because of the short-term maturities of our investments, we do not believe that an increase in market rates would have a materially negative impact on the realized value of our investment portfolio. We actively monitor changes in interest rates and, with our current portfolio of short-term investments, we are not exposed to potential loss due to changes in interest rates.

***Convertible Notes, Term Debt and Embedded Derivatives***

As of September 30, 2025 and December 31, 2024, we had fixed-rate borrowings from our 2026 Notes and 2029 Notes. We record all of our fixed-rate borrowings at amortized cost and, therefore, do not experience any risk for changes in interest rates. However, we include embedded derivatives along with our debt in our reporting of our 2029 Notes in our condensed consolidated balance sheet. The derivatives on our 2029 Notes are marked to fair value every reporting period. The fair value inputs to the derivative valuation include stock price, unsecuritized discount rate, risk-free rate, volatility, and term. Consequently, we may incur gains and losses on the derivative as changes occur in any of these inputs at each reporting period. For further details see "Note 4 — Fair Value Measurements" and "Note 6 — Debt" in the Notes to the Condensed Consolidated Financial Statements included elsewhere in this Quarterly Report on Form 10-Q.

As of each of September 30, 2025 and December 31, 2024, our Term Loan borrowings were recorded at amortized cost. However, interest is calculated based on adjusted SOFR, subject to a 3.00% floor, plus 8.75% per annum. Therefore, we experience exposure to any adjustments in the adjusted SOFR. Our Term Loan includes embedded derivatives that may be affected by provisions under the Credit Agreement requiring prepayment. The Closing of the Transaction with Novo Nordisk would require mandatory prepayment of the full loan balance along with a 5.00% prepayment premium, payment of accrued and unpaid interest and certain expenses.

**ITEM 4. CONTROLS AND PROCEDURES**

**Evaluation of Disclosure Controls and Procedures**

Our management, with the participation of our principal executive officer and principal financial officer, evaluated the effectiveness of our disclosure controls and procedures, as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act, as of September 30, 2025. Management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving their objectives, and management necessarily applies its judgment in evaluating the cost-benefit relationship of possible controls and procedures. Based on the evaluation of our disclosure controls and procedures as of September 30, 2025, our principal executive officer and principal financial officer concluded that, as of such date, our disclosure controls and procedures were effective at the reasonable assurance level.

**Changes in Internal Control over Financial Reporting**

There was no change in our internal control over financial reporting identified in connection with the evaluation required by Rule 13a-15(d) and 15d-15(d) under the Exchange Act that occurred during the period covered by this report that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

------

[**Table of Contents**](#toc)

**PART II** — **OTHER INFORMATION**

**ITEM 1. LEGAL PROCEEDINGS**

From time to time, in the ordinary course of business, we may be involved in various claims, lawsuits and other proceedings. As of the date of filing of this Quarterly Report on Form 10-Q, we were not involved in any material legal proceedings.

**ITEM 1A. RISK FACTORS**

We operate in an environment that involves a number of risks and uncertainties. Before making an investment decision you should carefully consider the risks described in Part I, Item 1A, "Risk Factors" of our Annual Report on Form 10-K for the year ended December 31, 2024, as filed with the SEC on March 31, 2025. In assessing the risk factors set forth in our Annual Report on Form 10-K for the year ended December 31, 2024, you should also refer to the other information included therein and in this Quarterly Report on Form 10-Q, including the supplemental risk factor below. In addition, we may be adversely affected by risks that we currently deem to be immaterial or by other risks that are not currently known to us. Due to these risks and uncertainties, known and unknown, our past financial results may not be a reliable indicator of future performance and historical trends should not be used to anticipate results or trends in future periods. The trading price of our common stock could decline due to any of these risks and you may lose all or part of your investment.

***The Transaction with Novo Nordisk may not close when anticipated, or at all, and a significant delay or failure to close the Transaction would materially adversely affect our business, financial condition, results of operations, strategic plans, future operating performance, and, ultimately, ability to continue as a going concern.***

We have entered into the APLA pursuant to which Novo Nordisk will receive exclusive global rights to develop and commercialize zaltenibart in all indications. Under the terms and conditions of the APLA, we will be eligible to receive up to a total of $2.1 billion in upfront and milestone-based payments, plus tiered royalties on net sales of commercialized products. This total includes an upfront payment of $240.0 million payable in cash upon Closing of the Transaction. The receipt of this upfront payment would enable us to (i) repay in full all obligations outstanding under our Credit Agreement, (ii) repay at maturity the remaining $17.1 million principal balance of our 2026 Notes, and (iii) provide sufficient capital for at least 12 months of post-closing operations, including the potential launch of narsoplimab. We do not have sufficient cash on hand to fund these expenses without receipt of the upfront payment from Novo Nordisk.

Completion of the Transaction is subject to customary closing conditions, including the expiration or early termination of the ongoing waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended ("HSR Act"). The Transaction is expected to close in the fourth quarter of 2025. However, there can be no assurance that the waiting period under the HSR Act will expire or be terminated or that any other closing conditions will be satisfied. The pendency of the Transaction may create uncertainty or disruption in our business relationships, including with personnel and vendors, and could divert management's attention from ongoing operations. If the Transaction does not close, whether due to the inability to obtain HSR Act clearance or the failure of any other closing condition, we will not receive the upfront payment and, further, will not realize the anticipated benefits of the Transaction as a whole. This would materially adversely affect our business, financial condition, and results of operations, including our ability to comply with affirmative covenants under our Credit Agreement. It would also materially adversely affect our strategic plans, including those related to the potential launch of narsoplimab, and would, in turn, materially adversely affect our future operating performance. Ultimately, the failure to close the Transaction may materially adversely affect our ability to continue as a going concern.

**ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS** 

On May 12, 2025, we entered into Note Conversion Agreements, which resulted in the conversion of $10.0 million aggregate principal amount of 2026 Notes held by two holders into 2,819,866 shares of our common stock in three tranches. We did not receive new cash proceeds in connection with the Equitization Transaction. The shares of common stock were issued in reliance on the exemption from registration provided by Section 4(a)(2) of the Securities Act.

**ITEM 3. DEFAULTS UPON SENIOR SECURITIES** 

Not applicable.

**ITEM 4. MINE SAFETY DISCLOSURES** 

Not applicable.

**ITEM 5. OTHER INFORMATION**

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) None.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) None.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c) During the three months ended September 30, 2025, none of our directors or Section 16 reporting officers adopted or terminated any contract, instruction or written plan for the purchase or sale of our securities that was intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act or any "non-Rule 10b5-1 trading arrangement" (as defined in Item 408(c) of Regulation S-K).

------

[**Table of Contents**](#toc)

**ITEM 6. EXHIBITS** 

---

| | |
|:---|:---|
| **Exhibit**<br> **Number** | **Description** |
| 31.1 | [Certification of Principal Executive Officer Pursuant to Rule 13-14(a) or Rule 15d-14(a) of the Securities Exchange Act of 1934 as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002](ex_856787.htm) |
| 31.2 | [Certification of Principal Financial Officer Pursuant to Rule 13-14(a) or Rule 15d-14(a) of the Securities Exchange Act of 1934 as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002](ex_856788.htm) |
| 32.1 | [Certification of Principal Executive Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002](ex_856789.htm) |
| 32.2 | [Certification of Principal Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002](ex_856790.htm) |
| 101.INS | Inline XBRL Instance Document |
| 101.SCH | Inline XBRL Taxonomy Extension Schema Document |
| 101.CAL | Inline XBRL Taxonomy Extension Calculation Linkbase Document |
| 101.DEF | Inline XBRL Taxonomy Extension Definition Linkbase Document |
| 101.LAB | Inline XBRL Taxonomy Extension Label Linkbase Document |
| 101.PRE | Inline XBRL Taxonomy Extension Presentation Linkbase Document |
| 104.1 | Cover Page Interactive Data File, formatted in Inline XBRL (included in Exhibit 101) |

---

------

The certifications attached as Exhibits 32.1 and 32.2 that accompany this Quarterly Report on Form 10-Q are not deemed filed with the SEC and are not to be incorporated by reference into any filing of Omeros Corporation under the Securities Act or the Exchange Act, whether made before or after the date of this Quarterly Report on Form 10-Q, irrespective of any general incorporation language contained in such filing.<br>

------

[**Table of Contents**](#toc)

**SIGNATURES**

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

---

| | |
|:---|:---|
|  | **OMEROS CORPORATION** |
| Dated: November 13, 2025 | /s/ Gregory A. Demopulos |
|  | Gregory A. Demopulos, M.D. |
|  | President, Chief Executive Officer and Chairman of the Board of Directors |
| Dated: November 13, 2025 | /s/ David J. Borges |
|  | David J. Borges |
|  | Vice President, Finance, Chief Accounting Officer and Treasurer |

---

## Exhibit 31.1

**Exhibit 31.1**

**CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER PURSUANT TO RULE 13a-14(a)/15d-14(a) OF** <br> **THE SECURITIES EXCHANGE ACT OF 1934, AS ADOPTED PURSUANT TO SECTION 302 OF THE** <br> **SARBANES-OXLEY ACT OF 2002**

I, Gregory A. Demopulos, M.D., certify that:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1. I have reviewed this quarterly report on Form 10-Q of Omeros Corporation;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;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;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;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;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;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:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our 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;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;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;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;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

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;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; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;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):

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;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

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;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.

---

| |
|:---|
| Dated: November 13, 2025 |
| /s/ Gregory A. Demopulos |
| Gregory A. Demopulos, M.D.<br> Principal Executive Officer |

---

## Exhibit 31.2

**Exhibit 31.2**

**CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER PURSUANT TO RULE 13a-14(a)/15d-14(a) OF THE**<br> **SECURITIES EXCHANGE ACT OF 1934, AS ADOPTED PURSUANT TO SECTION 302 OF THE** <br> **SARBANES-OXLEY ACT OF 2002**

I, David J. Borges, certify that:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1. I have reviewed this quarterly report on Form 10-Q of Omeros Corporation;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;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;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;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;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;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:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our 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;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;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;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;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

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;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; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;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):

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;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

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;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.

---

| |
|:---|
| Dated: November 13, 2025 |
| /s/ David J. Borges |
| David J. Borges |
| Vice President, Finance, Chief Accounting Officer and Treasurer |

---

## Exhibit 32.1

**Exhibit 32.1**

**CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER PURSUANT TO 18 U.S.C. SECTION 1350, AS**<br> **ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002**

In connection with the Quarterly Report on Form 10-Q of Omeros Corporation (the "Company") for the quarter ended September 30, 2025, as filed with the Securities and Exchange Commission on the date hereof (the "Report"), the undersigned officer of the Company certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

This certification accompanies the Report pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 and shall not, except to the extent required by the Sarbanes-Oxley Act of 2002, be deemed filed by the Company for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as may be expressly set forth by specific reference in such filing.

---

| |
|:---|
| Dated: November 13, 2025 |
| /s/ Gregory A. Demopulos |
| Gregory A. Demopulos, M.D. |
| Principal Executive Officer |

---

## Exhibit 32.2

**Exhibit 32.2**

**CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER PURSUANT TO 18 U.S.C. SECTION 1350, AS** <br> **ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002**

In connection with the Quarterly Report on Form 10-Q of Omeros Corporation (the "Company") for the quarter ended September 30, 2025, as filed with the Securities and Exchange Commission on the date hereof (the "Report"), the undersigned officer of the Company certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

This certification accompanies the Report pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 and shall not, except to the extent required by the Sarbanes-Oxley Act of 2002, be deemed filed by the Company for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as may be expressly set forth by specific reference in such filing.

---

| |
|:---|
| Dated: November 13, 2025 |
| /s/ David J. Borges |
| David J. Borges |
| Vice President, Finance, Chief Accounting Officer and Treasurer |

---