SEC Form 4 · Updated Daily
OMER
— OMEROS CORPORATION OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| Demopulos Gregory A MD | Director · Officer | 1,469,308 | 2026-02-18 | F |
| Cable Thomas J. | Director | 35,067 | 2026-08-20 | S |
| Cancelmo Peter B | Officer | 200 | 2026-08-31 | S |
| HANISH ARNOLD C | Director | 0 | 2026-08-27 | S |
| Borges David J. | Officer | 0 | 2026-08-24 | S |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-08-31 | Cancelmo Peter B | Option exercise (derivative) | 25,000 | $0.00 | 50,000 |
| 2026-08-31 | Cancelmo Peter B | Open-market sale | 25,000 | $18.54 | 200 |
| 2026-08-31 | Cancelmo Peter B | Option exercise | 25,000 | $2.94 | 25,200 |
| 2026-08-28 | Cancelmo Peter B | Option exercise (derivative) | 25,000 | $0.00 | 75,000 |
| 2026-08-28 | Cancelmo Peter B | Open-market sale | 25,000 | $18.65 | 200 |
| 2026-08-28 | Cancelmo Peter B | Option exercise | 25,000 | $2.94 | 25,200 |
| 2026-08-27 | HANISH ARNOLD C | Option exercise (derivative) | 2,500 | $0.00 | 0 |
| 2026-08-27 | HANISH ARNOLD C | Open-market sale | 5,000 | $19.02 | 0 |
| 2026-08-27 | HANISH ARNOLD C | Open-market sale | 5,000 | $18.88 | 5,000 |
| 2026-08-27 | HANISH ARNOLD C | Option exercise | 7,500 | $14.66 | 10,000 |
| 2026-08-27 | HANISH ARNOLD C | Option exercise | 2,500 | $15.81 | 2,500 |
| 2026-08-26 | HANISH ARNOLD C | Option exercise (derivative) | 5,000 | $0.00 | 2,500 |
| 2026-08-26 | HANISH ARNOLD C | Open-market sale | 5,000 | $18.53 | 0 |
| 2026-08-26 | HANISH ARNOLD C | Option exercise | 5,000 | $15.81 | 5,000 |
| 2026-08-24 | Borges David J. | Option exercise (derivative) | 906 | $0.00 | 20,000 |
| 2026-08-24 | Borges David J. | Open-market sale | 906 | $19.10 | 0 |
| 2026-08-24 | Borges David J. | Option exercise | 906 | $2.94 | 906 |
| 2026-08-21 | Borges David J. | Option exercise (derivative) | 4,094 | $0.00 | 20,906 |
| 2026-08-21 | Borges David J. | Option exercise (derivative) | 5,906 | $0.00 | 9,094 |
| 2026-08-21 | Borges David J. | Open-market sale | 10,000 | $18.95 | 0 |
| 2026-08-21 | Borges David J. | Option exercise | 4,094 | $2.94 | 10,000 |
| 2026-08-21 | Borges David J. | Option exercise | 5,906 | $3.93 | 5,906 |
| 2026-08-20 | Cable Thomas J. | Option exercise (derivative) | 7,500 | $0.00 | 0 |
| 2026-08-20 | Cable Thomas J. | Open-market sale | 15,000 | $18.45 | 35,067 |
| 2026-08-20 | Cable Thomas J. | Option exercise | 7,500 | $3.93 | 50,067 |
| 2026-08-20 | Cable Thomas J. | Option exercise | 7,500 | $2.00 | 42,567 |
| 2026-08-13 | Borges David J. | Option exercise (derivative) | 5,000 | $0.00 | 15,000 |
| 2026-08-13 | Borges David J. | Open-market sale | 5,000 | $16.95 | 0 |
| 2026-08-13 | Borges David J. | Option exercise | 5,000 | $3.93 | 5,000 |
| 2026-08-12 | Schocken Joseph L | Grant / award (derivative) | 30,000 | $0.00 | 30,000 |
| 2026-07-22 | Borges David J. | Grant / award (derivative) | 105,000 | $0.00 | 105,000 |
| 2026-07-22 | Cancelmo Peter B | Grant / award (derivative) | 105,000 | $0.00 | 105,000 |
| 2026-07-22 | Demopulos Gregory A MD | Grant / award (derivative) | 1,000,000 | $0.00 | 1,000,000 |
| 2026-06-18 | Bumol Thomas F. | Grant / award (derivative) | 15,000 | $0.00 | 15,000 |
| 2026-06-18 | Cable Thomas J. | Grant / award (derivative) | 15,000 | $0.00 | 15,000 |
| 2026-06-18 | Demopulos Peter A MD | Grant / award (derivative) | 15,000 | $0.00 | 15,000 |
| 2026-06-18 | HANISH ARNOLD C | Grant / award (derivative) | 15,000 | $0.00 | 15,000 |
| 2026-06-18 | Hood Leroy E. MD PhD | Grant / award (derivative) | 15,000 | $0.00 | 15,000 |
| 2026-06-18 | Perkinson Diana T. | Grant / award (derivative) | 15,000 | $0.00 | 15,000 |
| 2026-06-18 | Shah Rajiv | Grant / award (derivative) | 15,000 | $0.00 | 15,000 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.