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Omeros (OMER) Institutional Ownership

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$19.83 0.00 (0.00%)
Closing price 10/9/2026 04:00 PM Eastern
Extended Trading
$19.82 -0.01 (-0.08%)
As of 10/9/2026 07:30 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Massive. Learn more.
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Institutional Ownership Changes (13F Filings) for Omeros (NASDAQ:OMER)

Current
Institutional Ownership
Percentage
48.79%
Number of
Institutional Buyers
(last 12 months)
79
Total
Institutional Inflows
(last 12 months)
$158.29M
Number of
Institutional Sellers
(last 12 months)
23
Total
Institutional Outflows
(last 12 months)
$10.43M
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OMER Institutional Buying and Selling by Quarter

Omeros Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
10/9/2026GK Wealth Management LLC3,420$65K0.0%N/A0.005%
9/22/2026State Street Corp2,319,906$22.06M0.0%+20.9%3.205%
9/9/2026Engineers Gate Manager LP14,536$138K0.0%N/A0.020%
9/9/2026Squarepoint Ops LLC55,030$523K0.0%N/A0.076%
9/8/2026Arizona State Retirement System18,873$179K0.0%N/A0.026%
8/27/2026Corient Private Wealth LP659,730$6.27M0.0%-17.7%0.911%
8/26/2026HighTower Advisors LLC115,368$1.10M0.0%+4.3%0.159%
8/25/2026VIRGINIA RETIREMENT SYSTEMS ET Al15,400$146K0.0%N/A0.021%
8/22/2026Compass Financial Management LLC32,815$312K0.0%N/A0.045%
8/21/2026AXQ Capital LP23,246$221K0.0%-40.1%0.032%
8/20/2026Headlands Technologies LLC45,401$432K0.0%-9.1%0.063%
8/20/2026Ancora Advisors LLC168,750$1.61M0.0%+46.7%0.233%
8/20/2026Two Sigma Securities LLC15,939$152K0.0%N/A0.022%
8/19/2026UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC53,362$507K0.0%+9,655.4%0.074%
8/19/2026Wellington Management Group LLP204,541$1.95M0.0%+9.2%0.283%
8/17/2026Corient Private Wealth LP659,730$6.27M0.0%N/A0.911%
8/17/2026Bank of America Corp DE194,140$1.85M0.0%N/A0.268%
8/15/2026Jupiter Topco LLC30,500$290K0.0%N/A0.042%
8/14/2026Ancora Advisors LLC168,750$1.61M0.0%N/A0.233%
8/14/2026Legal & General Group Plc44,686$425K0.0%N/A0.062%
8/14/2026The Manufacturers Life Insurance Company18,965$180K0.0%N/A0.026%
8/12/2026Compass Financial Management LLC32,815$312K0.0%N/A0.045%
8/7/2026BlackRock Inc.6,044,633$57.48M0.0%N/A8.351%
8/7/2026Deutsche Bank AG75,053$714K0.0%N/A0.104%
8/6/2026Bank of New York Mellon Corp195,990$1.86M0.0%N/A0.271%
7/30/2026Pictet Asset Management Holding SA18,029$171K0.0%N/A0.025%
7/29/2026Avantax Planning Partners Inc.31,100$296K0.0%+47.4%0.043%
7/27/2026Cambridge Investment Research Advisors Inc.92,403$879K0.0%+4.3%0.128%
5/19/2026Bank of America Corp DE204,805$2.16M0.0%+57.8%0.283%
5/16/2026The Manufacturers Life Insurance Company18,454$195K0.0%-7.0%0.025%
5/16/2026Quantinno Capital Management LP61,541$650K0.0%+145.4%0.085%
5/16/2026Polar Asset Management Partners Inc.200,000$2.11M0.0%-25.6%0.276%
5/14/2026Sei Investments Co.13,171$139K0.0%-58.5%0.018%
5/7/2026Dimensional Fund Advisors LP179,594$1.90M0.0%+85.2%0.249%
5/6/2026Assetmark Inc.3,600$38K0.0%N/A0.005%
5/5/2026NFSG Corp47,710$504K0.1%+39.1%0.066%
5/5/2026Avantax Planning Partners Inc.21,100$223K0.0%+59.8%0.029%
5/2/2026International Assets Investment Management LLC5,800$61K0.0%+16.0%0.008%
5/1/2026Fifth Third Bancorp39,000$412K0.0%+3,800.0%0.054%
4/27/2026Leonteq Securities AG10,000$106K0.0%N/A0.014%
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3/9/2026Corient Private Wealth LLC688,025$11.82M0.0%+13.0%0.970%
3/3/2026Caitong International Asset Management Co. Ltd9,276$159K0.0%N/A0.013%
2/19/2026Invesco Ltd.154,782$2.66M0.0%+26.8%0.218%
2/19/2026Corient Private Wealth LLC687,325$11.81M0.0%+12.9%0.969%
2/18/2026Virtus Investment Advisers LLC26,212$450K0.1%N/A0.037%
2/18/2026Wellington Management Group LLP202,617$3.48M0.0%+4.2%0.286%
2/18/2026Susquehanna Portfolio Strategies LLC92,759$1.59M0.0%-45.8%0.131%
2/18/2026Millennium Management LLC441,811$7.59M0.0%+10.0%0.623%
2/18/2026Man Group plc27,099$465K0.0%N/A0.038%
2/18/2026Engineers Gate Manager LP20,082$345K0.0%N/A0.028%
2/17/2026Schonfeld Strategic Advisors LLC12,667$218K0.0%N/A0.018%
2/17/2026AQR Capital Management LLC22,838$392K0.0%+7.2%0.032%
2/17/2026Abel Hall LLC10,240$176K0.0%N/A0.014%
2/17/2026Jump Financial LLC228,000$3.92M0.0%N/A0.322%
2/17/2026Farallon Capital Management LLC23,000$395K0.0%N/A0.032%
2/17/2026Price T Rowe Associates Inc. MD95,745$1.64M0.0%+6.9%0.135%
2/17/2026Osaic Holdings Inc.7,547$130K0.0%+34.6%0.011%
2/17/2026Russell Investments Group Ltd.14,014$241K0.0%+31.0%0.020%
2/17/2026Graham Capital Management L.P.13,222$227K0.0%-61.6%0.019%
2/16/2026Verition Fund Management LLC63,493$1.09M0.0%N/A0.090%
2/16/2026MML Investors Services LLC77,875$1.34M0.0%+31.6%0.110%
2/16/2026Arax Advisory Partners5,255$90K0.0%+56.4%0.007%
2/16/2026Barclays PLC120,490$2.07M0.0%-8.7%0.170%
2/13/2026Stifel Financial Corp1,809,766$31.08M0.0%-0.1%2.553%
2/13/2026Rafferty Asset Management LLC12,226$210K0.0%N/A0.017%
2/13/2026Itau Unibanco Holding S.A.180,000$3.05M0.1%N/A0.254%
2/13/2026Charles Schwab Investment Management Inc.593,222$10.19M0.0%+7.2%0.837%
2/13/2026State Street Corp1,573,526$27.03M0.0%+26.9%2.219%
2/13/2026Caitong International Asset Management Co. Ltd1,933$33K0.1%N/A0.003%
2/12/2026MetLife Investment Management LLC36,200$622K0.0%+76.6%0.051%
2/12/2026Dimensional Fund Advisors LP96,948$1.67M0.0%N/A0.137%
2/12/2026Mindset Wealth Management LLC52,000$893K0.2%-13.3%0.073%
2/12/2026Informed Momentum Co LLC207,480$3.56M0.4%N/A0.293%
2/12/2026New York State Common Retirement Fund20,713$356K0.0%+81.5%0.029%
2/12/2026Nuveen LLC153,187$2.63M0.0%+74.8%0.216%
2/11/2026Deutsche Bank AG48,694$837K0.0%+19.3%0.069%
2/11/2026Cerity Partners LLC30,450$523K0.0%+6.1%0.043%
2/11/2026Los Angeles Capital Management LLC30,920$531K0.0%N/A0.044%
2/11/2026State of Wyoming1,433$25K0.0%N/A0.002%
2/10/2026Goldman Sachs Group Inc.227,294$3.90M0.0%-32.4%0.321%
2/10/2026AXQ Capital LP29,151$501K0.1%N/A0.041%
2/10/2026Intech Investment Management LLC29,967$515K0.0%+16.9%0.042%
2/9/2026Geode Capital Management LLC1,631,350$28.03M0.0%+6.3%2.301%
2/9/2026AlphaQuest LLC82,597$1.42M0.1%+8,259,600.0%0.116%
2/9/2026Harbour Investments Inc.21,835$375K0.0%+62.1%0.031%
2/9/2026Coldstream Capital Management Inc.53,605$921K0.0%+107.5%0.076%
2/6/2026ProShare Advisors LLC15,171$261K0.0%+12.1%0.021%
2/6/2026HighTower Advisors LLC104,059$1.79M0.0%+9.3%0.147%
2/5/2026AlphaCore Capital LLC17,647$303K0.0%N/A0.025%
2/5/2026Avantax Planning Partners Inc.13,200$227K0.0%+30.7%0.019%
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2/3/2026International Assets Investment Management LLC5,000$86K0.0%-67.8%0.007%
1/29/2026Comerica Bank38,000$653K0.0%+8.6%0.054%
1/29/2026UBS Group AG2,222,982$38.18M0.0%+213.5%3.135%
1/29/2026Vanguard Group Inc.4,013,315$68.93M0.0%+19.9%5.661%
1/29/2026China Universal Asset Management Co. Ltd.16,553$284K0.0%-24.5%0.023%
1/23/2026Farther Finance Advisors LLC7,106$122K0.0%+16.5%0.010%
1/21/2026Newbridge Financial Services Group Inc.34,310$589K0.1%-74.5%0.048%
1/16/2026Empirical Financial Services LLC d.b.a. Empirical Wealth Management10,500$180K0.0%-74.1%0.015%
1/9/2026SG Americas Securities LLC18,825$323K0.0%-58.5%0.027%
1/8/2026Wealth Enhancement Advisory Services LLC31,728$545K0.0%+9.0%0.045%


OMER Institutional Ownership - Frequently Asked Questions

During the previous two years, 129 institutional investors and hedge funds held shares of Omeros. The most heavily invested institutionals were Vanguard Group Inc. ($68.93M), BlackRock Inc. ($57.48M), UBS Group AG ($38.18M), Stifel Financial Corp ($31.08M), Geode Capital Management LLC ($28.03M), State Street Corp ($22.06M), and Corient Private Wealth LLC ($11.82M).Learn more on Omeros' institutional investors.

48.79% of Omeros' stock is owned by institutional investors. Learn more on OMER's institutional investor holdings.

Of the 115 institutional investors that purchased Omeros' stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: BlackRock Inc. ($6.04M), UBS Group AG ($1.51M), Vanguard Group Inc. ($825.34K), JPMorgan Chase & Co. ($776.00K), State Street Corp ($737.97K), Corient Private Wealth LP ($659.73K), and Nomura Holdings Inc. ($430.93K).

Institutional investors have bought a total of 14,108,932 shares in the last 24 months. This purchase volume represents approximately $158.29M in transactions.

Of the 23 institutional investors that sold Omeros' stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: UBS Group AG ($159.41K), Corient Private Wealth LP ($141.68K), Goldman Sachs Group Inc. ($108.79K), Newbridge Financial Services Group Inc. ($100.20K), Susquehanna Portfolio Strategies LLC ($78.33K), Polar Asset Management Partners Inc. ($68.80K), and Nomura Holdings Inc. ($44.79K).

Institutional investors have sold a total of 905,750 shares in the last 24 months. This volume of shares sold represents approximately $10.43M in transactions.


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Institutional ownership data for NASDAQ:OMER is compiled from quarterly 13F filings submitted to the U.S. Securities and Exchange Commission (SEC), with the most recent received on 10/9/2026. New 13F filings are added each quarter as they're published.
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