OMER: OMEROS CORP insider trading, 5% holders and institutional ownership
From public SEC filings: open-market insider purchases and sales (Form 4, last 180 days), holders of 5% or more (Schedules 13D and 13G) and institutional ownership (Form 13F). Insider and 5% data delayed 48 hours.
Insider trading
0 open-market buys totaling - and 2 sales totaling $419K in the last 180 days.
Insider sales
| Trade date | Insider | Role | Value | 10b5-1 plan |
|---|---|---|---|---|
| 2026-09-23 | Borges David J. | Officer | $210K | yes |
| 2026-09-22 | Borges David J. | Officer | $210K | yes |
Activist and 5% holders
| Filed | What | Holder | Stake | Change | Filing |
|---|---|---|---|---|---|
| 2026-07-29 | 13G amendment | BlackRock, Inc. | 8.20% | SEC |
Institutional ownership (Q2 2026)
171 institutions reported holding $306.08M of OMEROS CORP on Form 13F (162 the quarter before). 32 opened a new position and 25 sold out. Shares held by institutions: +17%.
| Largest holders | Shares | Value |
|---|---|---|
| BlackRock, Inc. | 6,044,633 | $57.48M |
| UBS Group AG | 3,148,384 | $29.94M |
| VANGUARD CAPITAL MANAGEMENT LLC | 3,072,050 | $29.22M |
| STATE STREET CORP | 2,319,906 | $22.06M |
| GEODE CAPITAL MANAGEMENT, LLC | 1,914,460 | $18.21M |
| STIFEL FINANCIAL CORP | 1,836,925 | $17.47M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 962,828 | $9.16M |
| Invesco Ltd. | 751,771 | $7.15M |
| NORTHERN TRUST CORP | 727,348 | $6.92M |
| Rock Springs Capital Management LP | 718,499 | $6.83M |
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