Omeros Corporation (OMER) ownership: Top institutional holder: VANGUARD GROUP INC ($68.93M). Insider activity: Net Seller (1 buys, 5 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| VANGUARD GROUP INC | 4013315.00 | $68.93M | 2025-12-31 |
| BlackRock, Inc. | 5309626.00 | $56.07M | 2026-03-31 |
| INGALLS & SNYDER LLC | 3559423.00 | $37.59M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 2983259.00 | $31.50M | 2026-03-31 |
| UBS Group AG | 2340731.00 | $24.72M | 2026-03-31 |
| STATE STREET CORP | 1919575.00 | $20.27M | 2026-03-31 |
| STIFEL FINANCIAL CORP | 1831585.00 | $19.34M | 2026-03-31 |
| BlackRock Fund Advisors | 1926785.00 | $19.11M | 2016-12-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-05-22 | |
| Sell | null | 2026-05-22 | |
| Sell | null | 2026-05-22 | |
| Sell | null | 2026-02-18 | |
| Buy | null | 2026-02-18 | |
| Sell | null | 2026-02-18 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.