SEC Form 4 · accession 0001437749-26-028951
OMEROS CORP · OMER
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
David J. Borges
Officer — VP, Finance & CAO
Period of report
Aug 21, 2026
Accepted (ET)
Aug 25, 2026 · 5:40 pm EDT
Rule 10b5-1 plan
yes — trade under a plan
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 21, 2026 | M | 5,906 | $3.93 | A | 5,906 | D | |
| Common Stock | Aug 21, 2026 | M | 4,094 | $2.94 | A | 10,000 | D | |
| Common Stock | Aug 21, 2026 | S | 10,000 | $18.95 | D | 0 | D | |
| Common Stock | Aug 24, 2026 | M | 906 | $2.94 | A | 906 | D | |
| Common Stock | Aug 24, 2026 | S | 906 | $19.10 | D | 0 | 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)F2 | $3.93 | Aug 21, 2026 | M | 5,906 | D | — | Sep 20, 2032 | Common Stock | 5,906 | 9,094 | D |
| Stock Option (Right to Buy)F3 | $2.94 | Aug 21, 2026 | M | 4,094 | D | — | Sep 21, 2033 | Common Stock | 4,094 | 20,906 | D |
| Stock Option (Right to Buy)F3 | $2.94 | Aug 24, 2026 | M | 906 | D | — | Sep 21, 2033 | Common Stock | 906 | 20,000 | D |
Explanation of responses
- F1Open market sale pursuant to a previously established Rule 10b5-1 trading plan adopted by the reporting person on February 10, 2026. The trading schedule, including sale periods and the number of shares to be sold, was established at the time of the trading plan's adoption in accordance with Rule 10b5-1 under the Securities Exchange Act of 1934, as amended.
- F2This option vests and becomes exercisable over 48 equal monthly installments, with a vesting commencement date of April 1, 2022. Installments vest and become exercisable on each monthly anniversary thereafter.
- F3This option vests and becomes 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.