OMEROS CORP (OMER)
Institutional ownership reported to the SEC as of Q2 2026, across 31 quarters.
170
Reporting holders
$371.4M
Reported value
46.2%
Of shares outstanding
14.6%
Held as options
+16
Holder change
Institutions report 33,454,161 shares against 72,388,316 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end.
Options share is the part of reported value carried in derivative lines rather than shares. A high figure means institutions are expressing a view on this security without owning much of it.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| BlackRock, Inc. | $57.5M | 6,044,633 | 0.00% | 8q | +13.8%+$7.0M |
| UBS Group AG | $29.9M | 3,148,384 | 0.00% | 31q | +34.5%+$7.7M |
| VANGUARD CAPITAL MANAGEMENT LLC | $29.2M | 3,072,050 | 0.00% | 2q | +3.0%+$844.4K |
| STATE STREET CORP | $22.1M | 2,319,906 | 0.00% | 31q | +20.9%+$3.8M |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $21.1M | 325,194 | 0.00% | 31q | -33.0%-$10.4M |
| GEODE CAPITAL MANAGEMENT, LLC | $18.2M | 1,914,460 | 0.00% | 31q | +9.3%+$1.5M |
| STIFEL FINANCIAL CORP | $17.5M | 1,836,925 | 0.01% | 31q | HELD |
| Affinity Asset Advisors, LLC | $13.4M | options only | 0.61% | new | OPTIONS |
| Corient Private Wealth LP | $12.5M | 1,319,460 | 0.01% | 15q | +64.6%+$4.9M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | $9.2M | 962,828 | 0.00% | 2q | +34.0%+$2.3M |
| CITADEL ADVISORS LLC | $7.9M | 85,594 | 0.00% | 31q | -67.1%-$16.1M |
| Invesco Ltd. | $7.1M | 751,771 | 0.00% | 13q | +316.2%+$5.4M |
| NORTHERN TRUST CORP | $6.9M | 727,348 | 0.00% | 31q | +29.0%+$1.6M |
| Rock Springs Capital Management LP | $6.8M | 718,499 | 0.33% | new | NEW |
| Rubric Capital Management LP | $6.2M | 656,874 | 0.06% | new | NEW |
| Caption Management, LLC | $5.8M | 130,000 | 0.03% | new | NEW |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $5.8M | 604,633 | 0.00% | 31q | +3.8%+$210.4K |
| Sixth Street Partners Management Company, L.P. | $5.8M | 604,633 | 0.00% | new | NEW |
| BANK OF MONTREAL /CAN/ | $5.4M | 568,424 | 0.00% | 31q | HELD |
| VANGUARD FIDUCIARY TRUST CO | $4.7M | 491,173 | 0.00% | 2q | HELD |
| FEDERATED HERMES, INC. | $4.5M | 478,290 | 0.01% | new | NEW |
| Clutterbuck Capital Management LLC | $4.3M | 450,000 | 2.43% | 3q | +50.0%+$1.4M |
| TWO SIGMA INVESTMENTS, LP | $3.8M | 402,662 | 0.00% | 22q | +40.6%+$1.1M |
| MORGAN STANLEY | $3.8M | 394,459 | 0.00% | 35q | +24.1%+$728.2K |
| JANE STREET GROUP, LLC | $3.3M | 20,166 | 0.00% | 12q | -86.1%-$20.4M |
| GROUP ONE TRADING LLC | $3.3M | 58,697 | 0.00% | 31q | +52.0%+$1.1M |
| MILLENNIUM MANAGEMENT LLC | $3.3M | 343,839 | 0.00% | 11q | -16.3%-$635.0K |
| Badgley Phelps Wealth Managers, LLC | $2.5M | 263,556 | 0.04% | 13q | HELD |
| SIMPLEX TRADING, LLC | $2.2M | 8,859 | 0.00% | 31q | -76.4%-$7.3M |
| WELLINGTON MANAGEMENT GROUP LLP | $1.9M | 204,541 | 0.00% | 6q | +9.2%+$164.0K |
| Bank of New York Mellon Corp | $1.9M | 195,990 | 0.00% | 31q | +17.9%+$282.9K |
| BANK OF AMERICA CORP /DE/ | $1.8M | 194,140 | 0.00% | 31q | -5.2%-$101.4K |
| Nuveen, LLC | $1.6M | 169,952 | 0.00% | 6q | +10.2%+$149.8K |
| Ancora Advisors LLC | $1.6M | 168,750 | 0.03% | 21q | +46.7%+$511.2K |
| GOLDMAN SACHS GROUP INC | $1.5M | 157,008 | 0.00% | 31q | -22.6%-$436.4K |
| WELLS FARGO & COMPANY/MN | $1.5M | 156,889 | 0.00% | 31q | -33.7%-$758.9K |
| LMR Partners LLP | $1.4M | options only | 0.01% | 2q | OPTIONS |
| Swiss National Bank | $1.3M | 137,300 | 0.00% | new | NEW |
| Virtus Investment Advisers, LLC | $1.3M | 133,129 | 0.29% | 3q | +395.5%+$1.0M |
| MML INVESTORS SERVICES, LLC | $1.1M | 118,175 | 0.00% | 9q | +104.9%+$575.4K |
| AMERIPRISE FINANCIAL INC | $1.1M | 117,456 | 0.00% | 16q | -50.2%-$1.1M |
| HighTower Advisors, LLC | $1.1M | 115,368 | 0.00% | 31q | +4.3%+$45.1K |
| RHUMBLINE ADVISERS | $1.0M | 110,271 | 0.00% | 13q | +7.2%+$70.9K |
| PEAK6 LLC | $951.0K | options only | 0.00% | new | OPTIONS |
| Brevan Howard Capital Management LP | $932.4K | 98,047 | 0.01% | 5q | +91.6%+$445.9K |
| Walleye Capital LLC | $900.4K | 374 | 0.00% | 6q | -98.9%-$82.2M |
| COLDSTREAM CAPITAL MANAGEMENT INC | $805.9K | 84,743 | 0.01% | 18q | +56.6%+$291.1K |
| Quantinno Capital Management LP | $796.8K | 83,786 | 0.00% | 4q | +36.1%+$211.5K |
| Balyasny Asset Management L.P. | $794.6K | 83,558 | 0.00% | 2q | +187.3%+$518.1K |
| JUPITER ASSET MANAGEMENT LTD | $724.5K | 76,186 | 0.00% | new | NEW |
| DEUTSCHE BANK AG\ | $713.8K | 75,053 | 0.00% | 34q | +36.4%+$190.4K |
| ALLIANCEBERNSTEIN L.P. | $707.4K | 66,990 | 0.00% | 13q | HELD |
| CITIGROUP INC | $692.6K | 72,829 | 0.00% | 31q | +136.5%+$399.8K |
| MINDSET WEALTH MANAGEMENT, LLC | $671.4K | 70,600 | 0.13% | 8q | +18.7%+$105.6K |
| AMERICAN FINANCIAL GROUP INC | $609.7K | 64,113 | 0.21% | 31q | HELD |
| STATE OF WISCONSIN INVESTMENT BOARD | $573.8K | 60,339 | 0.00% | 2q | +411.4%+$461.6K |
| Vanguard Global Advisers, LLC | $532.7K | 56,019 | 0.00% | 2q | +36.2%+$141.7K |
| Squarepoint Ops LLC | $523.3K | 55,030 | 0.00% | new | NEW |
| Merit Financial Group, LLC | $510.5K | 53,680 | 0.00% | 2q | +98.9%+$253.8K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | $507.5K | 53,362 | 0.00% | 3q | +9655.4%+$502.3K |
| VANGUARD ASSET MANAGEMENT, Ltd | $454.3K | 47,769 | 0.00% | new | NEW |
| BARCLAYS PLC | $448.5K | 47,157 | 0.00% | 31q | +5.0%+$21.3K |
| NFSG Corp | $439.5K | 46,210 | 0.05% | 5q | -3.1%-$14.3K |
| Headlands Technologies LLC | $431.8K | 45,401 | 0.05% | 2q | -9.1%-$43.0K |
| Legal & General Group Plc | $425.0K | 44,686 | 0.00% | 13q | +636.4%+$367.3K |
| JPMORGAN CHASE & CO | $418.7K | 42,247 | 0.00% | 31q | +1.3%+$5.2K |
| MetLife Investment Management, LLC | $413.8K | 43,510 | 0.00% | 13q | +12.6%+$46.4K |
| Zurcher Kantonalbank (Zurich Cantonalbank) | $407.4K | 42,841 | 0.00% | 6q | +5302.4%+$399.9K |
| PRUDENTIAL FINANCIAL INC | $403.1K | 42,385 | 0.00% | 2q | +228.4%+$280.4K |
| Susquehanna Portfolio Strategies, LLC | $397.1K | 41,755 | 0.01% | 5q | -55.0%-$485.0K |
| INTERNATIONAL ASSETS INVESTMENT MANAGEMENT, LLC | $380.2K | 40,400 | 0.02% | 5q | +596.6%+$325.6K |
| FIFTH THIRD BANCORP | $370.9K | 39,000 | 0.00% | 29q | HELD |
| Sound Capital Solutions LLC | $364.0K | 38,274 | 0.09% | new | FIRST |
| Cerity Partners LLC | $353.7K | 37,188 | 0.00% | 11q | +17.7%+$53.3K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $315.9K | 33,217 | 0.00% | 9q | +4.8%+$14.4K |
| LPL Financial LLC | $314.1K | 33,033 | 0.00% | 2q | +68.5%+$127.7K |
| Diametric Capital, LP | $313.9K | 33,010 | 0.03% | 2q | +12.6%+$35.1K |
| COMPASS FINANCIAL MANAGEMENT LLC | $312.1K | 32,815 | 0.04% | new | FIRST |
| Focus Partners Wealth | $301.7K | 31,723 | 0.00% | 3q | -33.3%-$150.8K |
| BRIGHTON JONES LLC | $300.5K | 31,597 | 0.01% | 2q | -0.9%-$2.7K |
| Avantax Planning Partners, Inc. | $295.8K | 31,100 | 0.01% | 5q | +47.4%+$95.1K |
| Jupiter Topco LLC | $290.2K | 30,500 | 0.00% | new | FIRST |
| Russell Investments Group, Ltd. | $288.0K | 30,282 | 0.00% | 9q | +116.3%+$154.9K |
| AQR CAPITAL MANAGEMENT LLC | $282.7K | 29,726 | 0.00% | 9q | -1.5%-$4.3K |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | $256.8K | 27,000 | 0.00% | 16q | HELD |
| PROFUND ADVISORS LLC | $250.3K | 26,319 | 0.01% | 3q | +27.5%+$53.9K |
| Atom Investors LP | $227.7K | 23,945 | 0.02% | new | NEW |
| Creative Planning | $221.4K | 23,282 | 0.00% | 3q | +10.6%+$21.3K |
| AXQ CAPITAL, LP | $221.1K | 23,246 | 0.02% | 3q | -40.1%-$148.1K |
| HARBOUR INVESTMENTS, INC. | $220.1K | 23,139 | 0.00% | 8q | +5.1%+$10.6K |
| Stordahl Capital Management, Inc. | $217.4K | 22,860 | 0.04% | 7q | HELD |
| State of New Jersey Common Pension Fund D | $210.3K | 22,115 | 0.00% | new | NEW |
| INTECH INVESTMENT MANAGEMENT LLC | $208.0K | 21,869 | 0.00% | 7q | +19.7%+$34.2K |
| NEW YORK STATE COMMON RETIREMENT FUND | $197.0K | 20,713 | 0.00% | 13q | HELD |
| DeepCurrents Investment Group LLC | $189.9K | 19,971 | 0.01% | 2q | +64.6%+$74.6K |
| Rafferty Asset Management, LLC | $185.2K | 19,474 | 0.00% | 3q | +58.4%+$68.2K |
| Police & Firemen's Retirement System of New Jersey | $183.2K | 19,265 | 0.00% | 7q | +17.8%+$27.6K |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE | $180.4K | 18,965 | 0.00% | 13q | +2.8%+$4.9K |
| ARIZONA STATE RETIREMENT SYSTEM | $179.5K | 18,873 | 0.00% | new | NEW |
| Pictet Asset Management Holding SA | $171.5K | 18,029 | 0.00% | new | NEW |
Five percent filings
Anyone crossing 5% of a company must say so within days - far sooner than the next quarterly holdings report. A 13D declares an intent to influence the company; a 13G is the passive version. See all activist filings →
| Filed | Form | Filer | % of class |
|---|---|---|---|
| 2026-07-29 | 13G/A | BlackRock, Inc. | 8.2% |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 170 | $371.4M | 33,454,161 | 38 | 62 | 37 | 14.6% |
| Q1 2026 | 154 | $310.1M | 27,271,818 | 29 | 58 | 39 | 7.0% |
| Q4 2025 | 149 | $661.0M | 30,268,018 | 34 | 56 | 29 | 21.4% |
| Q3 2025 | 131 | $139.2M | 33,076,972 | 16 | 51 | 30 | 14.6% |
| Q2 2025 | 122 | $80.8M | 25,421,132 | 15 | 36 | 35 | 5.6% |
| Q1 2025 | 129 | $202.0M | 23,347,121 | 21 | 29 | 44 | 5.0% |
| Q4 2024 | 122 | $243.0M | 22,315,390 | 25 | 41 | 25 | 9.3% |
| Q3 2024 | 98 | $85.4M | 20,291,349 | 12 | 21 | 29 | 5.7% |
| Q2 2024 | 94 | $86.1M | 20,176,740 | 12 | 22 | 26 | 4.8% |
| Q1 2024 | 89 | $75.4M | 20,930,546 | 9 | 23 | 29 | 4.2% |
| Q4 2023 | 90 | $68.6M | 25,051,418 | 9 | 25 | 26 | 2.1% |
| Q3 2023 | 94 | $67.5M | 26,717,580 | 10 | 26 | 22 | 4.3% |
| Q2 2023 | 96 | $126.0M | 21,402,240 | 32 | 23 | 20 | 7.4% |
| Q1 2023 | 74 | $72.5M | 19,624,965 | 7 | 25 | 20 | 4.0% |
| Q4 2022 | 78 | $34.0M | 13,757,503 | 11 | 22 | 18 | 7.7% |
| Q3 2022 | 97 | $70.8M | 20,472,323 | 13 | 22 | 32 | 8.6% |
| Q2 2022 | 105 | $74.4M | 24,029,021 | 19 | 30 | 29 | 8.7% |
| Q1 2022 | 136 | $187.9M | 28,786,168 | 18 | 28 | 47 | 7.8% |
| Q4 2021 | 144 | $227.3M | 30,983,483 | 24 | 45 | 42 | 10.0% |
| Q3 2021 | 147 | $481.8M | 30,425,656 | 10 | 49 | 41 | 13.3% |
| Q2 2021 | 156 | $549.9M | 32,209,151 | 21 | 57 | 37 | 13.0% |
| Q1 2021 | 155 | $696.9M | 34,755,944 | 34 | 36 | 51 | 11.2% |
| Q4 2020 | 140 | $549.2M | 34,640,184 | 17 | 43 | 39 | 9.7% |
| Q3 2020 | 137 | $382.0M | 34,909,474 | 31 | 58 | 23 | 7.6% |
| Q2 2020 | 123 | $476.5M | 31,802,482 | 20 | 47 | 31 | 1.8% |
| Q1 2020 | 125 | $432.8M | 31,343,264 | 23 | 48 | 26 | 3.3% |
| Q4 2019 | 130 | $428.4M | 28,439,455 | 19 | 45 | 28 | 6.5% |
| Q3 2019 | 116 | $449.1M | 26,000,913 | 17 | 39 | 27 | 5.5% |
| Q2 2019 | 114 | $448.2M | 26,549,220 | 12 | 40 | 36 | 7.1% |
| Q1 2019 | 123 | $468.2M | 25,596,430 | 14 | 34 | 35 | 5.2% |
| Q4 2018 | 123 | $290.5M | 24,655,168 | 2 | 5 | 3 | 5.4% |