Omeros Corp
OMER- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001285819
In the last 90 days, Omeros Corp insiders filed 0 open-market purchases and 6 sales; 171 institutions reported holding it in 13F filings for Q2 2026, worth $343.0M in total; no superinvestor holds it.
13F holders, Q1 2026
Institutional positions in Omeros Corp as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 162
- +15 vs. Q4 2025
- Shares held
- 30.8M
- +2.57M (+9.1%) vs. Q4 2025
- Total value
- $326.2M
- −$158.9M (−32.8%) vs. Q4 2025
- New holders
- 37
- 63 more added
- Sold out
- 22
- 40 more reduced
4 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting OMER on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 171 | $343.0M |
| Q1 2026 | 162 | $326.2M |
| Q4 2025 | 151 | $570.3M |
| Q3 2025 | 133 | $134.7M |
| Q2 2025 | 128 | $87.3M |
| Q1 2025 | 137 | $226.7M |
| Q4 2024 | 128 | $262.3M |
| Q3 2024 | 108 | $99.3M |
| Q2 2024 | 104 | $101.4M |
| Q1 2024 | 99 | $87.8M |
| Q4 2023 | 97 | $81.7M |
| Q3 2023 | 100 | $78.9M |
| Q2 2023 | 103 | $142.8M |
| Q1 2023 | 91 | $94.9M |
| Q4 2022 | 98 | $44.4M |
| Q3 2022 | 94 | $64.7M |
| Q2 2022 | 102 | $66.0M |
| Q1 2022 | 129 | $173.2M |
| Q4 2021 | 139 | $202.2M |
| Q3 2021 | 142 | $417.7M |
| Q2 2021 | 152 | $478.4M |
| Q1 2021 | 152 | $618.6M |
Institutions, Q1 2026
Shares, value and share of portfolio for each institution holding Omeros Corp; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 5,309,626 | $56.1M | 0.00% | +247,188+4.9% | Added |
| Ingalls & Snyder LLC | 3,559,423 | $37.6M | 1.33% | +110,724+3.2% | Added |
| Vanguard Capital Management LLC | 2,983,259 | $31.5M | 0.00% | +2,983,259 | New |
| UBS Group AG | 2,340,731 | $24.7M | 0.00% | +117,749+5.3% | Added |
| State Street Corp | 1,919,575 | $20.3M | 0.00% | +346,049+22.0% | Added |
| Stifel Financial Corp | 1,831,585 | $19.3M | 0.02% | +21,819+1.2% | Added |
| Geode Capital Management, LLC | 1,752,323 | $18.5M | 0.00% | +120,973+7.4% | Added |
| CI Private Wealth, LLC | 801,411 | $8.46M | 0.01% | +113,386+16.5% | Added |
| Vanguard Portfolio Management LLC | 718,675 | $7.59M | 0.00% | +718,675 | New |
| Charles Schwab Investment Management Inc | 582,512 | $6.15M | 0.00% | −10,710−1.8% | Reduced |
| Bank of Montreal | 568,426 | $6.00M | 0.00% | −33,217−5.5% | Reduced |
| Northern Trust Corp | 563,867 | $5.95M | 0.00% | +37,135+7.1% | Added |
| Vanguard Fiduciary Trust Co | 492,345 | $5.20M | 0.00% | +492,345 | New |
| Susquehanna International Group, LLP | 485,030 | $5.12M | 0.01% | −256,865−34.6% | Reduced |
| Millennium Management LLC | 410,609 | $4.34M | 0.00% | −31,202−7.1% | Reduced |
| Morgan Stanley | 317,892 | $3.36M | 0.00% | −68,260−17.7% | Reduced |
| Clutterbuck Capital Management LLC | 300,000 | $3.17M | 1.93% | +150,000+100.0% | Added |
| Two Sigma Investments, LP | 286,474 | $3.03M | 0.00% | −238,283−45.4% | Reduced |
| Badgley Phelps Wealth Managers, LLC | 263,556 | $2.78M | 0.06% | 00.0% | Unchanged |
| Citadel Advisors LLC | 260,048 | $2.75M | 0.00% | +19,696+8.2% | Added |
| Bank of America Corp | 204,805 | $2.16M | 0.00% | +89,997+78.4% | Added |
| Goldman Sachs Group Inc | 202,893 | $2.14M | 0.00% | −24,401−10.7% | Reduced |
| Polar Asset Management Partners Inc. | 200,000 | $2.11M | 0.05% | +131,200+190.7% | Added |
| Jump Financial, LLC | 195,824 | $2.07M | 0.03% | −32,176−14.1% | Reduced |
| Wellington Management Group LLP | 187,300 | $1.98M | 0.00% | −15,317−7.6% | Reduced |
| Invesco Ltd. | 180,629 | $1.91M | 0.00% | +25,847+16.7% | Added |
| Dimensional Fund Advisors LP | 179,594 | $1.90M | 0.00% | +82,646+85.2% | Added |
| Prosight Management, LP | 174,800 | $1.85M | 0.30% | +174,800 | New |
| Bank of New York Mellon Corp | 166,246 | $1.76M | 0.00% | +464+0.3% | Added |
| Nuveen, LLC | 154,201 | $1.63M | 0.00% | +1,014+0.7% | Added |
| Jane Street Group, LLC | 145,307 | $1.53M | 0.00% | −318,315−68.7% | Reduced |
| Wells Fargo & Company | 118,343 | $1.25M | 0.00% | −46,937−28.4% | Reduced |
| Ameriprise Financial Inc | 117,948 | $1.25M | 0.00% | +944+0.8% | Added |
| Ancora Advisors, LLC | 115,000 | $1.21M | 0.03% | +55,750+94.1% | Added |
| HighTower Advisors, LLC | 110,630 | $1.17M | 0.00% | +6,571+6.3% | Added |
| Alliancebernstein L.P. | 66,990 | $1.15M | 0.00% | −6,500−8.8% | Reduced |
| Price T Rowe Associates Inc | 107,293 | $1.13M | 0.00% | +11,548+12.1% | Added |
| Rhumbline Advisers | 102,818 | $1.09M | 0.00% | +2,713+2.7% | Added |
| Susquehanna Portfolio Strategies, LLC | 92,759 | $979.5K | 0.01% | 00.0% | Unchanged |
| Cambridge Investment Research Advisors, Inc. | 88,568 | $935.0K | 0.00% | +6,925+8.5% | Added |
| Marshall Wace, LLP | 83,682 | $883.7K | 0.00% | +83,682 | New |
| D. E. Shaw & Co., Inc. | 71,168 | $751.5K | 0.00% | −683,831−90.6% | Reduced |
| American Financial Group Inc | 64,113 | $677.0K | 0.25% | 00.0% | Unchanged |
| Quantinno Capital Management LP | 61,541 | $649.9K | 0.00% | +36,467+145.4% | Added |
| Mindset Wealth Management, LLC | 59,500 | $628.3K | 0.17% | +7,500+14.4% | Added |
| MML Investors Services, LLC | 57,675 | $609.0K | 0.00% | −20,200−25.9% | Reduced |
| BNP Paribas Arbitrage, SA | 56,908 | $600.9K | 0.00% | +40,557+248.0% | Added |
| Deutsche Bank AG | 55,030 | $581.1K | 0.00% | +6,336+13.0% | Added |
| Coldstream Capital Management Inc | 54,130 | $571.6K | 0.01% | +525+1.0% | Added |
| Brevan Howard Capital Management LP | 51,163 | $540.3K | 0.01% | −13,794−21.2% | Reduced |
| Headlands Technologies LLC | 49,926 | $527.2K | 0.06% | +49,926 | New |
| Newbridge Financial Services Group, Inc. | 47,710 | $503.8K | 0.08% | +13,400+39.1% | Added |
| Colony Group, LLC | 47,582 | $502.5K | 0.00% | +16,548+53.3% | Added |
| Barclays PLC | 44,922 | $474.4K | 0.00% | −75,568−62.7% | Reduced |
| Vanguard Global Advisers, LLC | 41,121 | $434.2K | 0.00% | +41,121 | New |
| Fifth Third Bancorp | 39,000 | $411.8K | 0.00% | +38,000+3,800.0% | Added |
| Axq Capital, LP | 38,815 | $409.9K | 0.05% | +9,664+33.2% | Added |
| JPMorgan Chase & Co | 41,720 | $409.3K | 0.00% | +4,529+12.2% | Added |
| MetLife Investment Management | 38,634 | $408.0K | 0.00% | +2,434+6.7% | Added |
| Group One Trading, L.P. | 38,604 | $407.7K | 0.01% | −94,665−71.0% | Reduced |
| Optimize Financial Inc | 38,407 | $405.6K | 0.20% | +38,407 | New |
| Nomura Holdings Inc | 38,237 | $403.8K | 0.00% | −616,784−94.2% | Reduced |
| Simplex Trading, LLC | 37,526 | $396.3K | 0.01% | −86,453−69.7% | Reduced |
| Walleye Capital LLC | 34,533 | $364.7K | 0.00% | −75,423−68.6% | Reduced |
| Acadian Asset Management LLC | 32,778 | $345.0K | 0.00% | +32,778 | New |
| Brighton Jones LLC | 31,880 | $336.7K | 0.01% | +31,880 | New |
| Mirae Asset Global ETFs Holdings Ltd. | 31,701 | $334.8K | 0.00% | +1,116+3.6% | Added |
| Cerity Partners LLC | 31,586 | $333.5K | 0.00% | +1,136+3.7% | Added |
| Citigroup Inc | 30,790 | $325.1K | 0.00% | +3,301+12.0% | Added |
| AQR Capital Management LLC | 30,178 | $318.7K | 0.00% | +7,340+32.1% | Added |
| Diametric Capital, LP | 29,322 | $309.6K | 0.08% | +29,322 | New |
| Balyasny Asset Management LLC | 29,083 | $307.1K | 0.00% | +29,083 | New |
| Vontobel Holding Ltd. | 28,450 | $300.4K | 0.00% | +23,000+422.0% | Added |
| Bridgeway Capital Management, LLC | 27,000 | $285.1K | 0.01% | −29,715−52.4% | Reduced |
| Merit Financial Group, LLC | 26,993 | $285.0K | 0.00% | +26,993 | New |
| Virtus Investment Advisers, Inc. | 26,865 | $283.7K | 0.08% | +653+2.5% | Added |
| Gsa Capital Partners LLP | 23,967 | $253.0K | 0.02% | +23,967 | New |
| Farallon Capital Management, L.L.C. | 23,000 | $242.9K | 0.00% | 00.0% | Unchanged |
| Stordahl Capital Management, Inc. | 22,860 | $241.4K | 0.05% | 00.0% | Unchanged |
| Harbour Investments, Inc. | 22,025 | $232.6K | 0.00% | +190+0.9% | Added |
| Avantax Planning Partners, Inc. | 21,100 | $222.8K | 0.01% | +7,900+59.8% | Added |
| Creative Planning | 21,047 | $222.3K | 0.00% | +4,131+24.4% | Added |
| New York State Common Retirement Fund | 20,713 | $218.7K | 0.00% | 00.0% | Unchanged |
| Profund Advisors LLC | 20,647 | $218.0K | 0.01% | +6,317+44.1% | Added |
| LPL Financial LLC | 19,608 | $207.1K | 0.00% | +19,608 | New |
| China Universal Asset Management Co., Ltd. | 18,982 | $200.4K | 0.02% | +2,429+14.7% | Added |
| FMR LLC | 18,677 | $197.2K | 0.00% | +609+3.4% | Added |
| Manufacturers Life Insurance Company, The | 18,454 | $194.9K | 0.00% | −1,396−7.0% | Reduced |
| Intech Investment Management LLC | 18,276 | $193.0K | 0.00% | −11,691−39.0% | Reduced |
| Apella Capital, LLC | 14,288 | $192.0K | 0.00% | 00.0% | Unchanged |
| Wealth Enhancement Advisory Services, LLC | 17,475 | $190.5K | 0.00% | −14,253−44.9% | Reduced |
| Breakwater Investment Management | 17,048 | $180.0K | 0.07% | 00.0% | Unchanged |
| Police & Firemen's Retirement System of New Jersey | 16,360 | $172.8K | 0.00% | 00.0% | Unchanged |
| XTX Topco Ltd | 15,251 | $161.1K | 0.00% | +15,251 | New |
| nVerses Capital, LLC | 14,404 | $152.1K | 0.14% | +14,404 | New |
| Russell Investments Group, Ltd. | 13,998 | $147.8K | 0.00% | −16−0.1% | Reduced |
| Canada Pension Plan Investment Board | 13,900 | $146.8K | 0.00% | −7,800−35.9% | Reduced |
| SEI Investments Co | 13,171 | $139.1K | 0.00% | −18,595−58.5% | Reduced |
| ProShare Advisors LLC | 13,118 | $138.5K | 0.00% | −2,053−13.5% | Reduced |
| Prudential Financial Inc | 12,905 | $136.3K | 0.00% | +12,905 | New |