OMEROS CORP (OMER) Institutional Shareholders
OMEROS CORP (OMER) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $339.21M in OMER holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of OMER tracked by InsiderSet, reporting ownership valued at approximately $57.48M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $111.52M, representing an estimated gain of +94.01% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 69% of the total disclosed OMER value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Ingalls & Snyder Llc, Ubs Group Ag, and several other long-term asset managers with concentrated positions in OMEROS CORP (OMER).
This page ranks the largest institutional OMER shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
163
Total Reported Value
$339.21M
Largest Holder
Blackrock, Inc.
Largest Position
$57.48M
Insider Transactions (90d)
13
Latest Filing Quarter
Q2 2026
New Institutional Positions
89
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.00% | 6,044,633 | $57,484,459 | $111,523,479 | +$54,039,020 | +94.01% | |
| Ingalls & Snyder Llc | 0.95% | 3,659,523 | $34,802,000 | $67,518,199 | +$32,716,199 | +94.01% | |
| Ubs Group Ag | 0.00% | 3,148,384 | $29,941,131 | $58,087,685 | +$28,146,554 | +94.01% | |
| Vanguard Capital Management Llc | 0.00% | 3,072,050 | $29,215,196 | $56,679,323 | +$27,464,127 | +94.01% | |
| State Street Corp | 0.00% | 2,319,906 | $22,062,306 | $42,802,266 | +$20,739,960 | +94.01% | |
| Geode Capital Management, Llc | 0.00% | 1,914,460 | $18,210,941 | $35,321,787 | +$17,110,846 | +93.96% | |
| Stifel Financial Corp | 0.01% | 1,836,925 | $17,469,159 | $33,891,266 | +$16,422,107 | +94.01% | |
| Vanguard Portfolio Management Llc | 0.00% | 962,828 | $9,156,494 | $17,764,177 | +$8,607,683 | +94.01% | |
| Invesco Ltd. | 0.00% | 751,771 | $7,149,343 | $13,870,175 | +$6,720,832 | +94.01% | |
| Northern Trust Corp | 0.00% | 727,348 | $6,917,080 | $13,419,571 | +$6,502,491 | +94.01% | |
| Rock Springs Capital Management Lp | 0.33% | 718,499 | $6,832,925 | $13,256,307 | +$6,423,382 | +94.01% | |
| Corient Private Wealth Llc | 0.01% | 659,730 | $6,274,033 | $12,172,019 | +$5,897,986 | +94.01% | |
| Rubric Capital Management Lp | 0.06% | 656,874 | $6,246,872 | $12,119,325 | +$5,872,453 | +94.01% | |
| Charles Schwab Investment Management Inc | 0.00% | 604,633 | $5,750,060 | $11,155,479 | +$5,405,419 | +94.01% | |
| Bank Of Montreal | 0.00% | 568,424 | $5,405,712 | $10,487,423 | +$5,081,711 | +94.01% | |
| Vanguard Fiduciary Trust Co | 0.00% | 491,173 | $4,671,055 | $9,062,142 | +$4,391,087 | +94.01% | |
| Federated Hermes, Inc. | 0.01% | 478,290 | $4,548,538 | $8,824,451 | +$4,275,913 | +94.01% | |
| Clutterbuck Capital Management Llc | 2.46% | 450,000 | $4,279,500 | $8,302,500 | +$4,023,000 | +94.01% | |
| Two Sigma Investments, Lp | 0.00% | 402,662 | $3,829,316 | $7,429,114 | +$3,599,798 | +94.01% | |
| Morgan Stanley | 0.00% | 394,459 | $3,751,306 | $7,277,769 | +$3,526,463 | +94.01% | |
| Millennium Management Llc | 0.00% | 343,839 | $3,269,909 | $6,343,830 | +$3,073,921 | +94.01% | |
| Susquehanna International Group, Llp | 0.00% | 325,194 | $3,092,595 | $5,999,829 | +$2,907,234 | +94.01% | |
| Badgley Phelps Wealth Managers, Llc | 0.04% | 263,556 | $2,506,418 | $4,862,608 | +$2,356,190 | +94.01% | |
| Wellington Management Group Llp | 0.00% | 204,541 | $1,945,185 | $3,773,781 | +$1,828,596 | +94.01% | |
| Bank Of New York Mellon Corp | 0.00% | 195,990 | $1,863,861 | $3,616,016 | +$1,752,155 | +94.01% | |
| Bank Of America Corp | 0.00% | 194,140 | $1,846,271 | $3,581,883 | +$1,735,612 | +94.01% | |
| Nuveen, Llc | 0.00% | 169,952 | $1,616,244 | $3,135,614 | +$1,519,370 | +94.01% | |
| Ancora Advisors Llc | 0.03% | 168,750 | $1,604,812 | $3,113,438 | +$1,508,626 | +94.01% | |
| Goldman Sachs Group Inc | 0.00% | 157,008 | $1,493,146 | $2,896,798 | +$1,403,652 | +94.01% | |
| Wells Fargo & Company/Mn | 0.00% | 156,889 | $1,492,014 | $2,894,602 | +$1,402,588 | +94.01% | |
| Swiss National Bank | 0.00% | 137,300 | $1,305,723 | $2,533,185 | +$1,227,462 | +94.01% | |
| Virtus Investment Advisers, Llc | 0.29% | 133,129 | $1,266,057 | $2,456,230 | +$1,190,173 | +94.01% | |
| Caption Management, Llc | 0.04% | 130,000 | $1,236,300 | $2,398,500 | +$1,162,200 | +94.01% | |
| Price T Rowe Associates Inc | 0.00% | 129,550 | $1,233,000 | $2,390,198 | +$1,157,198 | +93.85% | |
| Mml Investors Services, Llc | 0.00% | 118,175 | $1,123,844 | $2,180,329 | +$1,056,485 | +94.01% | |
| Ameriprise Financial Inc | 0.00% | 117,456 | $1,117,006 | $2,167,063 | +$1,050,057 | +94.01% | |
| Rhumbline Advisers | 0.00% | 110,271 | $1,048,666 | $2,034,500 | +$985,834 | +94.01% | |
| Brevan Howard Capital Management Lp | 0.01% | 98,047 | $932,427 | $1,808,967 | +$876,540 | +94.01% | |
| Citadel Advisors Llc | 0.00% | 85,594 | $813,999 | $1,579,209 | +$765,210 | +94.01% | |
| Coldstream Capital Management Inc | 0.01% | 84,743 | $805,906 | $1,563,508 | +$757,602 | +94.01% | |
| Quantinno Capital Management Lp | 0.00% | 83,786 | $796,805 | $1,545,852 | +$749,047 | +94.01% | |
| Balyasny Asset Management L.P. | 0.00% | 83,558 | $794,637 | $1,541,645 | +$747,008 | +94.01% | |
| Jupiter Asset Management Ltd | 0.00% | 76,186 | $724,529 | $1,405,632 | +$681,103 | +94.01% | |
| California State Teachers Retirement System | 0.00% | 75,730 | $720,192 | $1,397,219 | +$677,027 | +94.01% | |
| Deutsche Bank Ag\ | 0.00% | 75,053 | $713,754 | $1,384,728 | +$670,974 | +94.01% | |
| Alliancebernstein L.P. | 0.00% | 66,990 | $707,414 | $1,235,966 | +$528,552 | +74.72% | |
| Citigroup Inc | 0.00% | 72,829 | $692,604 | $1,343,695 | +$651,091 | +94.01% | |
| Mindset Wealth Management, Llc | 0.13% | 70,600 | $671,406 | $1,302,570 | +$631,164 | +94.01% | |
| American Financial Group Inc | 0.22% | 64,113 | $609,715 | $1,182,885 | +$573,170 | +94.01% | |
| State Of Wisconsin Investment Board | 0.00% | 60,339 | $573,824 | $1,113,255 | +$539,431 | +94.01% |
Frequently asked questions about OMER
Who owns the most OMER stock?
The largest holders of OMER are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for OMEROS CORP (OMER).
Is OMER widely held by superinvestors?
Many widely followed stocks like OMER appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly OMER is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.