OMER Omeros Corp
Omeros Corp (OMER) Institutional Ownership
What the institutions did with OMER last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| BlackRock, Inc. | 6.0M | 16.7% |
| INGALLS & SNYDER LLC | 3.7M | 10.1% |
| UBS Group AG | 3.1M | 8.7% |
| VANGUARD CAPITAL MANAGEMENT LLC | 3.1M | 8.5% |
| STATE STREET CORP | 2.3M | 6.4% |
| GEODE CAPITAL MANAGEMENT, LLC | 1.9M | 5.3% |
| STIFEL FINANCIAL CORP | 1.8M | 5.1% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 962.8K | 2.7% |
| Invesco Ltd. | 751.8K | 2.1% |
| NORTHERN TRUST CORP | 727.3K | 2.0% |
| Rock Springs Capital Management LP | 718.5K | 2.0% |
| Corient Private Wealth LP | 659.7K | 1.8% |
| Rubric Capital Management LP | 656.9K | 1.8% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 604.6K | 1.7% |
| BANK OF MONTREAL /CAN/ | 568.4K | 1.6% |
| VANGUARD FIDUCIARY TRUST CO | 491.2K | 1.4% |
| FEDERATED HERMES, INC. | 478.3K | 1.3% |
| Clutterbuck Capital Management LLC | 450.0K | 1.2% |
| TWO SIGMA INVESTMENTS, LP | 402.7K | 1.1% |
| MORGAN STANLEY | 394.5K | 1.1% |
| MILLENNIUM MANAGEMENT LLC | 343.8K | 0.9% |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 325.2K | 0.9% |
| Badgley Phelps Wealth Managers, LLC | 263.6K | 0.7% |
| WELLINGTON MANAGEMENT GROUP LLP | 204.5K | 0.6% |
| Bank of New York Mellon Corp | 196.0K | 0.5% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| UBS Group AG | Increased | 2.3M | 3.1M | +807.7K |
| BlackRock, Inc. | Increased | 5.3M | 6.0M | +735.0K |
| Rock Springs Capital Management LP | New | 0 | 718.5K | +718.5K |
| Rubric Capital Management LP | New | 0 | 656.9K | +656.9K |
| Invesco Ltd. | Increased | 180.6K | 751.8K | +571.1K |
| FEDERATED HERMES, INC. | New | 0 | 478.3K | +478.3K |
| STATE STREET CORP | Increased | 1.9M | 2.3M | +400.3K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 718.7K | 962.8K | +244.2K |
| Polar Asset Management Partners Inc. | Sold Out | 200.0K | 0 | -200.0K |
| Jump Financial, LLC | Sold Out | 195.8K | 0 | -195.8K |
| DIMENSIONAL FUND ADVISORS LP | Sold Out | 179.6K | 0 | -179.6K |
| Prosight Management, LP | Sold Out | 174.8K | 0 | -174.8K |
| CITADEL ADVISORS LLC | Reduced | 260.0K | 85.6K | -174.5K |
| NORTHERN TRUST CORP | Increased | 563.9K | 727.3K | +163.5K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 1.8M | 1.9M | +162.1K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | 485.0K | 325.2K | -159.8K |
| Clutterbuck Capital Management LLC | Increased | 300.0K | 450.0K | +150.0K |
| Corient Private Wealth LP | Reduced | 801.4K | 659.7K | -141.7K |
| Swiss National Bank | New | 0 | 137.3K | +137.3K |
| Caption Management, LLC | New | 0 | 130.0K | +130.0K |
| JANE STREET GROUP, LLC | Reduced | 145.3K | 20.2K | -125.1K |
| HRT FINANCIAL LP | New | 0 | 118.7K | +118.7K |
| TWO SIGMA INVESTMENTS, LP | Increased | 286.5K | 402.7K | +116.2K |
| Virtus Investment Advisers, LLC | Increased | 26.9K | 133.1K | +106.3K |
| INGALLS & SNYDER LLC | Increased | 3.6M | 3.7M | +100.1K |
| Cambridge Investment Research Advisors, Inc. | Increased | 88.6K | 184.8K | +96.2K |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 3.0M | 3.1M | +88.8K |
| MARSHALL WACE, LLP | Sold Out | 83.7K | 0 | -83.7K |
| MORGAN STANLEY | Increased | 317.9K | 394.5K | +76.6K |
| JUPITER ASSET MANAGEMENT LTD | New | 0 | 76.2K | +76.2K |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | Increased | 3.8K | 75.7K | +72.0K |
| D. E. Shaw & Co., Inc. | Sold Out | 71.2K | 0 | -71.2K |
| MILLENNIUM MANAGEMENT LLC | Reduced | 410.6K | 343.8K | -66.8K |
| MML INVESTORS SERVICES, LLC | Increased | 57.7K | 118.2K | +60.5K |
| Squarepoint Ops LLC | New | 0 | 55.0K | +55.0K |
| Balyasny Asset Management L.P. | Increased | 29.1K | 83.6K | +54.5K |
| Ancora Advisors LLC | Increased | 115.0K | 168.8K | +53.8K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | Increased | 547 | 53.4K | +52.8K |
| Susquehanna Portfolio Strategies, LLC | Reduced | 92.8K | 41.8K | -51.0K |
| STATE OF WISCONSIN INVESTMENT BOARD | Increased | 11.8K | 60.3K | +48.5K |
| VANGUARD ASSET MANAGEMENT, Ltd | New | 0 | 47.8K | +47.8K |
| Brevan Howard Capital Management LP | Increased | 51.2K | 98.0K | +46.9K |
| GOLDMAN SACHS GROUP INC | Reduced | 202.9K | 157.0K | -45.9K |
| BNP PARIBAS FINANCIAL MARKETS | Reduced | 56.9K | 13.5K | -43.4K |
| Zurcher Kantonalbank (Zurich Cantonalbank) | Increased | 793 | 42.8K | +42.0K |
| CITIGROUP INC | Increased | 30.8K | 72.8K | +42.0K |
| Legal & General Group Plc | Increased | 6.1K | 44.7K | +38.6K |
| WELLS FARGO & COMPANY/MN | Increased | 118.3K | 156.9K | +38.5K |
| NOMURA HOLDINGS INC | Sold Out | 38.2K | 0 | -38.2K |
| INTERNATIONAL ASSETS INVESTMENT MANAGEMENT, LLC | Increased | 5.8K | 40.4K | +34.6K |
| Walleye Capital LLC | Reduced | 34.5K | 374 | -34.2K |
| ACADIAN ASSET MANAGEMENT LLC | Sold Out | 32.8K | 0 | -32.8K |
| COLDSTREAM CAPITAL MANAGEMENT INC | Increased | 54.1K | 84.7K | +30.6K |
| Bank of New York Mellon Corp | Increased | 166.2K | 196.0K | +29.7K |
| PRUDENTIAL FINANCIAL INC | Increased | 12.9K | 42.4K | +29.5K |
| SIMPLEX TRADING, LLC | Reduced | 37.5K | 8.9K | -28.7K |
| Vontobel Holding Ltd. | Sold Out | 28.5K | 0 | -28.5K |
| GSA CAPITAL PARTNERS LLP | Sold Out | 24.0K | 0 | -24.0K |
| Atom Investors LP | New | 0 | 23.9K | +23.9K |
| FARALLON CAPITAL MANAGEMENT LLC | Sold Out | 23.0K | 0 | -23.0K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.