SEC Form 4 · accession 0001437749-26-029191
OMEROS CORP · OMER
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Arnold C Hanish
Director
Period of report
Aug 26, 2026
Accepted (ET)
Aug 28, 2026 · 4:31 pm EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0001285819
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common Stock | Aug 26, 2026 | M | 5,000 | $15.81 | A | 5,000 | D | |
| Common StockF1 | Aug 26, 2026 | S | 5,000 | $18.5265 | D | 0 | D | |
| Common Stock | Aug 27, 2026 | M | 2,500 | $15.81 | A | 2,500 | D | |
| Common Stock | Aug 27, 2026 | M | 7,500 | $14.66 | A | 10,000 | D | |
| Common StockF2 | Aug 27, 2026 | S | 5,000 | $18.8762 | D | 5,000 | D | |
| Common StockF3 | Aug 27, 2026 | S | 5,000 | $19.0161 | D | 0 | D | |
| Common StockF4 | holding | — | — | — | 12,400 | I | Arnold C. Hanish Living Trust |
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Stock Option (Right to Buy) | $15.81 | Aug 26, 2026 | M | 5,000 | D | Jun 16, 2022 | Jun 10, 2031 | Common Stock | 5,000 | 2,500 | D |
| Stock Option (Right to Buy) | $15.81 | Aug 27, 2026 | M | 2,500 | D | Jun 16, 2022 | Jun 10, 2031 | Common Stock | 2,500 | 0 | D |
| Stock Option (Right to Buy) | $14.66 | Aug 27, 2026 | M | 7,500 | D | Jun 10, 2021 | Jun 4, 2030 | Common Stock | 7,500 | 0 | D |
Explanation of responses
- F1This transaction was executed in multiple trades at prices ranging from $18.50 to $18.56. The price reported above reflects the weighted average sales price. The reporting person hereby undertakes to provide full information regarding the number of shares and prices at which the transactions referenced in this footnote were effected upon request to the SEC staff, the issuer, or a security holder of the issuer.
- F2This transaction was executed in multiple trades at prices ranging from $18.85 to $18.92. The price reported above reflects the weighted average sales price. The reporting person hereby undertakes to provide full information regarding the number of shares and prices at which the transactions referenced in this footnote were effected upon request to the SEC staff, the issuer, or a security holder of the issuer.
- F3This transaction was executed in multiple trades at prices ranging from $19.00 to $19.10. The price reported above reflects the weighted average sales price. The reporting person hereby undertakes to provide full information regarding the number of shares and prices at which the transactions referenced in this footnote were effected upon request to the SEC staff, the issuer, or a security holder of the issuer.
- F4These shares have not been sold and are held of record by the Arnold C. Hanish Living Trust, for which the reporting person serves as sole trustee.