SEC Form 4 · accession 0001437749-26-029427
OMEROS CORP · OMER
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Peter B Cancelmo
Officer — VP, General Counsel
Period of report
Aug 28, 2026
Accepted (ET)
Sep 1, 2026 · 4:41 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 28, 2026 | M | 25,000 | $2.94 | A | 25,200 | D | |
| Common StockF1 | Aug 28, 2026 | S | 25,000 | $18.6451 | D | 200 | D | |
| Common Stock | Aug 31, 2026 | M | 25,000 | $2.94 | A | 25,200 | D | |
| Common StockF2 | Aug 31, 2026 | S | 25,000 | $18.5416 | D | 200 | D |
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)F3 | $2.94 | Aug 28, 2026 | M | 25,000 | D | — | Sep 22, 2033 | Common Stock | 25,000 | 75,000 | D |
| Stock Option (Right to Buy)F3 | $2.94 | Aug 31, 2026 | M | 25,000 | D | — | Sep 22, 2033 | Common Stock | 25,000 | 50,000 | D |
Explanation of responses
- F1This transaction was executed in multiple trades at prices ranging from $18.55 to $18.77. 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 $18.32 to $18.90. 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 option shall vest and become exercisable over 48 equal monthly installments, with a vesting commencement date of April 1, 2023. Installments vest and become exercisable on each monthly anniversary thereafter.