OMEROS CORP (OMER)
Institutional ownership reported to the SEC as of Q2 2026, across 32 quarters.
Institutions report 36,269,686 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.
Calls and puts are the parts of reported value carried in derivative lines rather than shares, and they point in opposite directions: a manager holding calls is positioned for the security, one holding puts against it - or hedging shares they already own, which is why index funds carry so many. Most sites add the two together and report one figure, which averages away the only interesting part.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| BlackRock, Inc. | $57.5M | 6,044,633 | 0.00% | 8q | +13.8%+$7.0M |
| INGALLS & SNYDER LLC | $34.8M | 3,659,523 | 0.95% | 31q | +2.8%+$951.9K |
| 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 incl. $18.0M options CALL+PUT | 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 PUT | options only | 0.61% | new | OPTIONS |
| VANGUARD PORTFOLIO MANAGEMENT LLC | $9.2M | 962,828 | 0.00% | 2q | +34.0%+$2.3M |
| CITADEL ADVISORS LLC | $7.9M incl. $7.1M options CALL+PUT | 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 |
| Corient Private Wealth LP | $6.3M | 659,730 | 0.01% | 15q | -17.7%-$1.3M |
| Rubric Capital Management LP | $6.2M | 656,874 | 0.06% | new | NEW |
| Caption Management, LLC | $5.8M incl. $4.6M options CALL+PUT | 130,000 | 0.03% | new | NEW |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $5.8M | 604,633 | 0.00% | 31q | +3.8%+$210.4K |
| 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 incl. $3.1M options CALL+PUT | 20,166 | 0.00% | 12q | -86.1%-$20.4M |
| GROUP ONE TRADING LLC | $3.3M incl. $2.7M options CALL+PUT | 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 incl. $2.2M options CALL+PUT | 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 |
| Cambridge Investment Research Advisors, Inc. | $1.8M | 184,806 | 0.00% | 31q | +108.7%+$915.5K |
| 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 | +32.6%+$366.6K |
| LMR Partners LLP | $1.4M PUT | 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 |
| PRICE T ROWE ASSOCIATES INC /MD/ | $1.2M | 129,550 | 0.00% | 30q | +20.7%+$211.8K |
| HRT FINANCIAL LP | $1.1M incl. $1.1M options OPT | 118,700 | 0.00% | new | NEW |
| 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 | HELD |
| 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 CALL | 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 incl. $896.8K options CALL+PUT | 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 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | $720.2K | 75,730 | 0.00% | 13q | +1918.4%+$684.5K |
| 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 |
| 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 |
| OPTIMIZE FINANCIAL INC. | $364.0K | 38,274 | 0.13% | 2q | 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 |
| Merit Financial Group, LLC | $255.2K | 26,840 | 0.00% | 2q | -0.6%-$1.5K |
| 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 |
Showing the largest 100 of 175 reported holders.
What the company announced
Form 8-K filings from the last 120 days, showing only the items worth a reader's attention. Earnings releases, exhibit attachments and general disclosures are filed constantly and are left out. Filed is when the SEC received it; event is the date the company says the thing happened.
| Filed | Event date | What | Source |
|---|---|---|---|
| 2026-10-30 | 2026-10-28 | Directors or officers departed or appointed | filing |
| 2026-08-13 | 2026-08-12 | Directors or officers departed or appointed | filing |
What the insiders did
Open market purchases and sales reported on Form 4 in the last 180 days. Grants, option exercises and shares surrendered to cover tax are left out: they are compensation rather than a decision to buy or sell. Where a broker filled one order in tranches the lines are summed, because it was one decision.
Officers and directors
| Date | Insider | Role | Side | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-28 | Cancelmo Peter B | VP, General Counsel | Sold | 25,000 | $466.1K |
| 2026-08-31 | Cancelmo Peter B | VP, General Counsel | Sold | 25,000 | $463.5K |
| 2026-08-20 | Cable Thomas J. | Director | Sold | 15,000 | $276.8K |
| 2026-09-22 | Borges David J. | VP, Finance & CAO | Sold | 10,000 | $209.5K |
| 2026-09-23 | Borges David J. | VP, Finance & CAO | Sold | 10,000 | $209.5K |
| 2026-08-21 | Borges David J. | VP, Finance & CAO | Sold | 10,000 | $189.5K |
| 2026-08-27 | HANISH ARNOLD C | Director | Sold | 10,000 | $189.5K ×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 |
|---|---|---|---|---|---|---|---|
| Q3 2026 | 35 | $12.8M | 653,174 | 8 | 10 | 6 | 0.0% |
| Q2 2026 | 175 | $399.3M | 36,269,686 | 36 | 65 | 37 | 13.9% |
| Q1 2026 | 161 | $347.9M | 30,846,158 | 31 | 61 | 40 | 6.2% |
| Q4 2025 | 157 | $723.7M | 33,917,422 | 34 | 59 | 32 | 19.6% |
| Q3 2025 | 139 | $157.7M | 33,266,770 | 17 | 55 | 31 | 13.5% |
| Q2 2025 | 132 | $93.5M | 29,610,514 | 16 | 39 | 36 | 5.0% |
| Q1 2025 | 141 | $237.3M | 27,593,942 | 22 | 33 | 48 | 4.4% |
| Q4 2024 | 133 | $286.6M | 26,557,460 | 26 | 47 | 28 | 8.5% |
| Q3 2024 | 109 | $104.7M | 25,052,860 | 14 | 24 | 32 | 5.0% |
| Q2 2024 | 105 | $106.1M | 24,976,620 | 15 | 22 | 31 | 4.4% |
| Q1 2024 | 100 | $92.8M | 25,900,431 | 13 | 26 | 32 | 3.7% |
| Q4 2023 | 100 | $84.4M | 25,258,300 | 11 | 27 | 28 | 1.9% |
| Q3 2023 | 105 | $82.3M | 26,962,505 | 12 | 28 | 22 | 4.1% |
| Q2 2023 | 107 | $153.3M | 26,219,383 | 34 | 24 | 21 | 6.8% |
| Q1 2023 | 92 | $98.4M | 20,415,064 | 12 | 27 | 25 | 3.5% |
| Q4 2022 | 100 | $47.1M | 19,536,282 | 13 | 27 | 27 | 5.6% |
| Q3 2022 | 96 | $70.8M | 20,472,023 | 13 | 22 | 32 | 8.6% |
| Q2 2022 | 103 | $74.2M | 23,974,776 | 19 | 30 | 28 | 8.7% |
| Q1 2022 | 131 | $212.2M | 32,832,242 | 18 | 27 | 45 | 6.9% |
| Q4 2021 | 140 | $352.5M | 50,459,436 | 24 | 44 | 41 | 6.4% |
| Q3 2021 | 143 | $782.4M | 52,226,719 | 10 | 48 | 41 | 8.2% |
| Q2 2021 | 152 | $855.8M | 52,819,822 | 21 | 56 | 36 | 8.4% |
| Q1 2021 | 151 | $1.0B | 52,906,440 | 33 | 36 | 48 | 7.7% |
| Q4 2020 | 137 | $895.8M | 58,866,287 | 17 | 43 | 38 | 6.0% |
| Q3 2020 | 134 | $602.3M | 56,708,809 | 31 | 56 | 23 | 4.8% |
| Q2 2020 | 120 | $743.6M | 49,951,181 | 20 | 45 | 29 | 1.2% |
| Q1 2020 | 123 | $963.9M | 71,061,771 | 23 | 46 | 26 | 1.5% |
| Q4 2019 | 127 | $626.9M | 42,530,429 | 19 | 45 | 27 | 4.4% |
| Q3 2019 | 113 | $711.2M | 42,050,239 | 17 | 37 | 27 | 3.5% |
| Q2 2019 | 111 | $717.3M | 43,701,961 | 12 | 39 | 35 | 4.4% |
| Q1 2019 | 120 | $769.8M | 42,957,396 | 14 | 33 | 34 | 3.2% |
| Q4 2018 | 120 | $492.8M | 42,815,671 | 2 | 5 | 3 | 3.2% |
