Who owns OMEROS CORP?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of OMER from SEC Form 13F filings across 171 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 171 institutions disclosed 36.1M shares of OMEROS CORP worth $343.0M — about 50% of shares outstanding; the largest disclosed holder is BlackRock, Inc.. Source: SEC Form 13F filings, parsed by EvidInvest.
171
13F holders
$343.0M
value, 2026 filers
50%
of shares outstanding (36.1M sh)
37
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of OMER's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 6.0M | $57.5M | 0.0% | 8.4% | +13.8% |
| 2 | INGALLS & SNYDER LLC | 3.7M | $34.8M | 0.9% | 5.1% | +2.8% |
| 3 | UBS Group AG | 3.1M | $29.9M | 0.0% | 4.4% | +34.5% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 3.1M | $29.2M | 0.0% | 4.3% | +3.0% |
| 5 | STATE STREET CORP | 2.3M | $22.1M | 0.0% | 3.2% | +20.9% |
| 6 | GEODE CAPITAL MANAGEMENT, LLC | 1.9M | $18.2M | 0.0% | 2.7% | +9.3% |
| 7 | STIFEL FINANCIAL CORP | 1.8M | $17.5M | 0.0% | 2.5% | +0.3% |
| 8 | VANGUARD PORTFOLIO MANAGEMENT LLC | 962,828 | $9.2M | 0.0% | 1.3% | +34.0% |
| 9 | Invesco Ltd. | 751,771 | $7.1M | 0.0% | 1% | +316.2% |
| 10 | NORTHERN TRUST CORP | 727,348 | $6.9M | 0.0% | 1% | +29.0% |
| 11 | Rock Springs Capital Management LPNEW | 718,499 | $6.8M | 0.3% | 1% | new |
| 12 | Corient Private Wealth LP | 659,730 | $6.3M | 0.0% | 0.9% | -17.7% |
| 13 | Rubric Capital Management LPNEW | 656,874 | $6.2M | 0.1% | 0.9% | new |
| 14 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 604,633 | $5.8M | 0.0% | 0.8% | +3.8% |
| 15 | BANK OF MONTREAL /CAN/ | 568,424 | $5.4M | 0.0% | 0.8% | 0.0% |
| 16 | VANGUARD FIDUCIARY TRUST CO | 491,173 | $4.7M | 0.0% | 0.7% | -0.2% |
| 17 | FEDERATED HERMES, INC.NEW | 478,290 | $4.5M | 0.0% | 0.7% | new |
| 18 | Clutterbuck Capital Management LLC | 450,000 | $4.3M | 2.4% | 0.6% | +50.0% |
| 19 | TWO SIGMA INVESTMENTS, LP | 402,662 | $3.8M | 0.0% | 0.6% | +40.6% |
| 20 | MORGAN STANLEY | 394,459 | $3.8M | 0.0% | 0.5% | +24.1% |
| 21 | MILLENNIUM MANAGEMENT LLC | 343,839 | $3.3M | 0.0% | 0.5% | -16.3% |
| 22 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 325,194 | $3.1M | 0.0% | 0.5% | -33.0% |
| 23 | Badgley Phelps Wealth Managers, LLC | 263,556 | $2.5M | 0.0% | 0.4% | 0.0% |
| 24 | WELLINGTON MANAGEMENT GROUP LLP | 204,541 | $1.9M | 0.0% | 0.3% | +9.2% |
| 25 | Bank of New York Mellon Corp | 195,990 | $1.9M | 0.0% | 0.3% | +17.9% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.