Notice of Proposed Sale · 144
Omeros Corporation
OMERNASDAQEQUITYCurrent
Notice of Proposed Sale
Structured filing — 144
primary_doc.xml
Notice of proposed sale. The proposed amounts below do not establish that a sale occurred.
Proposed-sale notice
- Issuer
- OMEROS CORPORATION
- Issuer CIK
- 0001285819
- SEC file number
- 001-34475
- Phone
- 2066765000
- Person for whose account securities are to be sold
- DAVID BORGES
- Relationships to issuer
- Officer
- Street
- 201 Elliott Avenue West
- City
- SEATTLE
- State / country code
- WA
- Postal code
- 98119
Securities proposed for sale
| Security | Proposed units | Aggregate market value | Units outstanding | Approximate sale date | Exchange | Broker / market maker |
|---|---|---|---|---|---|---|
| Common | 14,927 | 314,213.35 | 72,388,316 | 09/23/2026 | NASDAQ | Morgan Stanley Smith Barney LLC Executive Financial Services |
Broker / market maker — proposed row 1, entry 1
- Name
- Morgan Stanley Smith Barney LLC Executive Financial Services
- Street
- 1 New York Plaza
- Street (continued)
- 8th Floor
- City
- New York
- State / country code
- NY
- Postal code
- 10004
Acquisition of securities to be sold
| Security | Acquired | Nature of acquisition | Acquired from | Amount acquired | Gift transaction | Payment date | Nature of payment |
|---|---|---|---|---|---|---|---|
| Common | 09/23/2026 | Exercise of Stock Options | Issuer | 14,927 | N | 09/23/2026 | Cash |
Sales reported in the preceding three months
| Seller | Security | Sale date | Amount sold | Gross proceeds |
|---|---|---|---|---|
| 10b5-1 Sales for DAVID JOSEPH BORGES | Common | 09/22/2026 | 10,000 | 209,500.00 |
| 10b5-1 Sales for DAVID JOSEPH BORGES | Common | 08/24/2026 | 906 | 17,304.60 |
| 10b5-1 Sales for DAVID JOSEPH BORGES | Common | 08/21/2026 | 10,000 | 189,500.00 |
| 10b5-1 Sales for DAVID JOSEPH BORGES | Common | 08/13/2026 | 5,000 | 84,750.00 |
Seller — prior-sale row 1, entry 1
- Name
- 10b5-1 Sales for DAVID JOSEPH BORGES
- Street
- 201 Elliott Avenue West
- City
- SEATTLE
- State / country code
- WA
- Postal code
- 98119
Seller — prior-sale row 2, entry 1
- Name
- 10b5-1 Sales for DAVID JOSEPH BORGES
- Street
- 201 Elliott Avenue West
- City
- SEATTLE
- State / country code
- WA
- Postal code
- 98119
Seller — prior-sale row 3, entry 1
- Name
- 10b5-1 Sales for DAVID JOSEPH BORGES
- Street
- 201 Elliott Avenue West
- City
- SEATTLE
- State / country code
- WA
- Postal code
- 98119
Seller — prior-sale row 4, entry 1
- Name
- 10b5-1 Sales for DAVID JOSEPH BORGES
- Street
- 201 Elliott Avenue West
- City
- SEATTLE
- State / country code
- WA
- Postal code
- 98119
Prior-sale reporting
- Nothing to report for the preceding three months
- N
Remarks
The securities to be sold were and will be received upon the exercise of stock options over the next three months. The dates of acquisition and payment were and will be the dates of exercise/sale.
Notice signature
- Notice date
- 09/23/2026
- Signed
- /s/ David Borges
- Plan adoption dates
- 02/10/2026
Company context
Omeros is an innovative biopharmaceutical company committed to discovering, developing and commercializing first-in-class small-molecule and protein therapeutics for large-market and orphan indications targeting immunologic disorders, including complement-mediated diseases and cancers, as well as addictive and compulsive disorders. Omeros’ lead MASP-2 inhibitor narsoplimab targets the lectin pathway of complement and is the subject of a biologics license application under review by FDA for the treatment of hematopoietic stem cell transplant-associated thrombotic microangiopathy. Omeros’ long-acting MASP-2 inhibitor OMS1029 has successfully completed Phase 1 single- and multiple-ascending dose clinical studies. OMS906, Omeros’ inhibitor of MASP-3, the key activator of the alternative pathway of complement, is in clinical development for treatment of paroxysmal nocturnal hemoglobinuria and complement 3 glomerulopathy. Funded by the National Institute on Drug Abuse, Omeros’ lead phosphodiesterase 7 inhibitor OMS527 is in clinical development for the treatment of cocaine use disorder. Omeros also is advancing a broad portfolio of novel cellular and molecular immuno-oncology programs.