Omeros (OMER) Institutional Ownership $4.48 +0.29 (+6.92%) Closing price 04:00 PM EasternExtended Trading$4.47 -0.01 (-0.22%) As of 06:07 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 Polygon.io. Learn more. Add Compare Share Share Ownership Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFDA EventsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock Institutional Ownership Changes (13F Filings) for Omeros (NASDAQ:OMER)CurrentInstitutional OwnershipPercentage48.79%Number ofInstitutional Buyers(last 12 months)66TotalInstitutional Inflows(last 12 months)$19.75MNumber ofInstitutional Sellers(last 12 months)35TotalInstitutional Outflows(last 12 months)$11.78M Get OMER Insider Trade Alerts Want to know when executives and insiders are buying or selling Omeros stock? Sign up for InsiderTrades.com's daily newsletter to get the latest insider transactions delivered to your inbox daily. Email Address Skip Chart & View Institutional Buying and Selling Data OMER Institutional Buying and Selling by Quarter Omeros Major Shareholders & Ownership History Export to ExcelReporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails8/19/2025 B. Riley Wealth Advisors Inc.10,760$32K0.0%N/A0.017% 8/19/2025 Newbridge Financial Services Group Inc.93,420$280K0.0%N/A0.151% 8/18/2025 Nomura Holdings Inc.88,469$265K0.0%-87.0%0.143% 8/15/2025 Tower Research Capital LLC TRC 13,414$40K0.0%+829.6%0.022% 8/15/2025 Corient Private Wealth LLC530,614$1.59M0.0%-26.3%0.859% 8/15/2025 BNP Paribas Financial Markets25,272$76K0.0%+548.7%0.041% 8/15/2025 Brevan Howard Capital Management LP105,299$316K0.0%N/A0.170% 8/15/2025 Ameriprise Financial Inc.116,536$350K0.0%-3.3%0.189% 8/14/2025 Jane Street Group LLC85,382$256K0.0%-22.4%0.138% 8/14/2025 Raymond James Financial Inc.9,781$29K0.0%-22.1%0.016% Get the Latest News and Ratings for OMER and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Omeros and its competitors with MarketBeat's FREE daily newsletter. 8/14/2025 Sei Investments Co.13,416$40K0.0%N/A0.022% 8/13/2025 Marshall Wace LLP741,376$2.22M0.0%+15.1%1.200% 8/13/2025 Invesco Ltd.116,688$350K0.0%+34.1%0.189% 8/12/2025 XTX Topco Ltd63,777$191K0.0%N/A0.103% 8/12/2025 Rhumbline Advisers98,825$296K0.0%-8.2%0.160% 8/12/2025 JPMorgan Chase & Co.31,985$96K0.0%-10.6%0.052% 8/8/2025 Intech Investment Management LLC34,108$102K0.0%+28.4%0.055% 8/5/2025 Corton Capital Inc.38,967$117K0.1%N/A0.063% 8/5/2025 Bank of Montreal Can571,095$1.71M0.0%+1.4%0.925% 7/29/2025 International Assets Investment Management LLC15,550$47K0.0%N/A0.027% 7/28/2025 Harbour Investments Inc.13,469$40K0.0%+46.1%0.023% 7/25/2025 Cypress Capital Group42,000$126K0.0%+20.7%0.072% 7/21/2025 Empirical Financial Services LLC d.b.a. Empirical Wealth Management40,500$122K0.0%+35.0%0.069% 7/10/2025 Wealth Enhancement Advisory Services LLC26,156$84K0.0%-62.8%0.045% 6/27/2025 Goldman Sachs Group Inc.181,155$1.49M0.0%-14.4%0.309% 5/21/2025 Acadian Asset Management LLC43,695$357K0.0%N/A0.075% 5/16/2025 Goldman Sachs Group Inc.181,155$1.49M0.0%-14.4%0.311% 5/16/2025 Jacobs Levy Equity Management Inc.85,514$703K0.0%-18.2%0.147% 5/16/2025 AQR Capital Management LLC34,700$285K0.0%-11.5%0.060% 5/16/2025 Ancora Advisors LLC5,800$48K0.0%-93.2%0.010% 5/15/2025 Nomura Holdings Inc.679,020$5.58M0.0%-9.1%1.165% 5/15/2025 Trexquant Investment LP10,760$88K0.0%N/A0.018% 5/14/2025 AlphaQuest LLC15,687$129K0.0%-45.7%0.027% 5/14/2025 Hsbc Holdings PLC17,138$142K0.0%N/A0.029% 5/14/2025 Wellington Management Group LLP136,002$1.12M0.0%N/A0.233% 5/12/2025 Nuveen LLC114,057$938K0.0%N/A0.196% 5/12/2025 Invesco Ltd.87,044$716K0.0%+169.1%0.149% 5/12/2025 Connor Clark & Lunn Investment Management Ltd.10,555$87K0.0%-90.7%0.018% 5/9/2025 Deutsche Bank AG42,019$345K0.0%+4.9%0.072% 5/9/2025 Charles Schwab Investment Management Inc.463,882$3.81M0.0%-2.4%0.796% Gold Hit $3,500. Here’s What’s Next… (Ad)Gold just smashed through $3,500—and some experts believe that’s only the beginning. With big banks like Goldman Sachs and JPMorgan forecasting as high as $6,000, now may be the most critical time in a generation to move.Claim Your Copy Before Prices Surge Again5/9/2025 Vanguard Group Inc.3,237,256$26.61M0.0%+3.0%5.552% 5/8/2025 SPC Financial Inc.17,400$143K0.0%-10.3%0.030% 5/8/2025 Harbour Investments Inc.9,218$76K0.0%+51.9%0.016% 5/5/2025 Stordahl Capital Management Inc.32,656$268K0.1%-18.4%0.056% 5/1/2025 New York State Common Retirement Fund11,413$94K0.0%-34.1%0.020% 4/29/2025 Bank of New York Mellon Corp151,062$1.24M0.0%+2.2%0.260% 4/17/2025 Sowell Financial Services LLC10,750$88K0.0%N/A0.019% 4/17/2025 Brighton Jones LLC30,714$252K0.0%+11.3%0.053% 4/16/2025 Wealth Enhancement Advisory Services LLC70,398$579K0.0%N/A0.121% 4/7/2025 GAMMA Investing LLC7,439$61K0.0%+14,486.3%0.013% 2/17/2025 Squarepoint Ops LLC32,009$316K0.0%-32.4%0.055% 2/17/2025 Two Sigma Advisers LP38,800$383K0.0%-15.7%0.067% 2/17/2025 Two Sigma Investments LP162,991$1.61M0.0%+8.8%0.281% 2/17/2025 ProShare Advisors LLC18,496$183K0.0%+75.0%0.032% 2/17/2025 Nomura Holdings Inc.747,281$7.38M0.0%+136.2%1.290% 2/17/2025Nuveen Asset Management LLC102,921$1.02M0.0%-8.4%0.178% 2/17/2025 Millennium Management LLC85,671$846K0.0%+46.2%0.148% 2/17/2025 MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.31,831$314K0.0%+3.6%0.055% 2/17/2025 Jacobs Levy Equity Management Inc.104,538$1.03M0.0%N/A0.180% 2/17/2025 Deutsche Bank AG40,046$396K0.0%+38.2%0.069% 2/17/2025 Bridgeway Capital Management LLC155,100$1.53M0.0%-3.8%0.268% 2/17/2025 BNP Paribas Financial Markets7,452$74K0.0%-39.8%0.013% 2/17/2025 Ameriprise Financial Inc.120,493$1.19M0.0%+2.0%0.208% 2/17/2025 Ancora Advisors LLC85,800$848K0.0%+1,036.4%0.148% 2/14/2025 Comerica Bank35,000$346K0.0%+16.7%0.060% 2/14/2025 The Manufacturers Life Insurance Company20,479$202K0.0%-5.4%0.035% 2/14/2025 Susquehanna Fundamental Investments LLC150,557$1.49M0.0%N/A0.260% 2/14/2025 Virtus ETF Advisers LLC8,373$83K0.0%N/A0.014% 2/14/2025 Voya Investment Management LLC17,233$170K0.0%-9.4%0.030% 2/14/2025 Price T Rowe Associates Inc. MD39,582$392K0.0%+12.5%0.068% 2/14/2025 Stifel Financial Corp1,581,205$15.62M0.0%-17.0%2.729% 2/14/2025 Tower Research Capital LLC TRC4,467$44K0.0%+79.0%0.008% 2/13/2025 Marshall Wace LLP44,205$437K0.0%N/A0.076% 2/13/2025 XTX Topco Ltd20,846$206K0.0%N/A0.036% 2/13/2025 Barclays PLC103,726$1.03M0.0%+9.6%0.179% 2/13/2025 Raymond James Financial Inc.12,549$124K0.0%N/A0.022% 2/13/2025 Invesco Ltd.32,348$320K0.0%-6.0%0.056% 2/13/2025 Cerity Partners LLC28,989$286K0.0%+9.9%0.050% 2/12/2025 ExodusPoint Capital Management LP15,495$153K0.0%-65.3%0.027% 2/12/2025 Franklin Resources Inc.13,186$130K0.0%N/A0.023% 2/12/2025 Alliancebernstein L.P.50,990$504K0.0%+153.4%0.088% 2/12/2025 JPMorgan Chase & Co.32,134$317K0.0%+31.3%0.055% 2/11/2025 Corebridge Financial Inc.27,808$275K0.0%-7.0%0.048% 2/11/2025 Vanguard Group Inc.3,141,657$31.04M0.0%-3.6%5.421% 2/11/2025 Quantbot Technologies LP4,671$46K0.0%N/A0.008% 2/11/2025 Mindset Wealth Management LLC63,000$622K0.2%+4.8%0.109% 2/10/2025 Corient Private Wealth LLC733,449$7.25M0.0%-6.7%1.266% 2/10/2025 Picton Mahoney Asset Management5,040$50K0.0%+692.5%0.009% 2/10/2025 Connor Clark & Lunn Investment Management Ltd.113,326$1.12M0.0%N/A0.196% 2/10/2025 Truvestments Capital LLC3,102$31K0.0%+116.5%0.005% The Top 10 AI Stocks You Need to Know (Ad)Discover the 10 Best AI Stocks to Buy Now! The AI revolution is reshaping the investment landscape, and knowing where to place your bets is crucial. Our free report reveals the 10 top AI stocks that should be on your radar right now. Don't miss your chance to get in on these high-potential tech plays.Download your free report today.2/7/2025 AlphaQuest LLC28,894$285K0.0%N/A0.050% 2/6/2025 Raymond James Financial Inc.12,549$124K0.0%N/A0.022% 2/6/2025 Charles Schwab Investment Management Inc.475,526$4.70M0.0%-2.0%0.821% 2/5/2025 US Bancorp DE8,205$81K0.0%N/A0.014% 2/4/2025 Bank of New York Mellon Corp147,741$1.46M0.0%-3.2%0.255% 1/31/2025 New York State Common Retirement Fund17,313$171K0.0%+245.4%0.030% 1/30/2025 Blue Trust Inc.3,090$31K0.0%-38.2%0.005% 1/24/2025China Universal Asset Management Co. Ltd.12,287$121K0.0%N/A0.021% 1/23/2025 Stordahl Capital Management Inc.40,000$395K0.1%N/A0.069% 1/21/2025 Brighton Jones LLC27,589$273K0.0%-18.0%0.048% (Data available from 1/1/2016 forward) OMER Institutional Ownership - Frequently Asked Questions Who are the largest shareholders of OMER shares? During the previous two years, 88 institutional investors and hedge funds held shares of Omeros. The most heavily invested institutionals were Vanguard Group Inc. ($26.61M), Stifel Financial Corp ($15.62M), Geode Capital Management LLC ($5.32M), State Street Corp ($4.87M), Charles Schwab Investment Management Inc. ($3.81M), Marshall Wace LLP ($2.22M), and Bank of Montreal Can ($1.71M).Learn more on Omeros' institutional investors. What percentage of Omeros' stock is owned by institutional investors? 48.79% of Omeros' stock is owned by institutional investors. Learn more on OMER's institutional investor holdings. Which institutional investors have been buying Omeros' stock? Of the 71 institutional investors that purchased Omeros' stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: Nomura Holdings Inc. ($430.93K), Susquehanna Fundamental Investments LLC ($306.51K), Wellington Management Group LLP ($212.95K), Vanguard Group Inc. ($176.95K), Marshall Wace LLP ($141.43K), Barclays PLC ($128.29K), and Ancora Advisors LLC ($117.73K). How much institutional buying is happening at Omeros? Institutional investors have bought a total of 2,633,205 shares in the last 24 months. This purchase volume represents approximately $19.75M in transactions. Which of Omeros' major shareholders have been selling company stock? Of the 35 institutional investors that sold Omeros' stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: Nomura Holdings Inc. ($658.81K), Stifel Financial Corp ($323.00K), Corient Private Wealth LLC ($242.81K), Vanguard Group Inc. ($117.94K), Connor Clark & Lunn Investment Management Ltd. ($102.77K), Ancora Advisors LLC ($80K), and Goldman Sachs Group Inc. ($60.89K). How much institutional selling is happening at Omeros? Institutional investors have sold a total of 1,890,168 shares in the last 24 months. This volume of shares sold represents approximately $11.78M in transactions. Related Companies NKTR Major Shareholders ASMB Major Shareholders CPIX Major Shareholders LLY Major Shareholders JNJ Major Shareholders ABBV Major Shareholders MRK Major Shareholders PFE Major Shareholders BMY Major Shareholders ZTS Major Shareholders This page (NASDAQ:OMER) was last updated on 8/21/2025 by MarketBeat.com Staff From Our PartnersTrump’s national nightmare is herePorter Stansberry and Jeff Brown say a new U.S. national emergency is already underway — and it could trigger ...Porter & Company | SponsoredAlex’s “Next Magnificent Seven” stocksThe original “Magnificent Seven” turned $7K into $1.18 million. 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