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OMER Insider Trading

Insider Ownership Percentage: 12.90%
Insider Buying (Last 12 Months): $0.00
Insider Selling (Last 12 Months): $369,300.00

Omeros Insider Trading History Chart

This chart shows the insider buying and selling history at Omeros by year and by quarter.

Skip ChartChart Data in Insider Trading History Table

Omeros Share Price & Price History

Current Price: $11.70
Price Change: ▼ Price Decrease of -0.55 (-4.49%)
As of 05/18/2026 04:00 PM ET

This chart shows the closing price history over time for OMER up to the past year.

Skip Chart and Table DataPrice Data in Insider Trading History Table
Days: 30 | 90 | 365

Omeros Insider Trading History

Transaction DateInsider NameTitleBuy/SellNumber of SharesAverage Share PriceTotal TransactionShares Held After TransactionDetails
1/13/2026David J BorgesCAOSell30,000$12.31$369,300.00View SEC Filing Icon  
11/17/2023Gregory A. DemopulosCEOBuy15,000$1.68$25,200.00123,945View SEC Filing Icon  
11/15/2023Peter A. DemopulosDirectorBuy10,000$1.53$15,300.00208,516View SEC Filing Icon  
5/22/2023Arnold C. HanishDirectorSell5,000$6.46$32,300.0035,067View SEC Filing Icon  
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SEC Filings (Institutional Ownership Changes) for Omeros (NASDAQ:OMER)

48.79% of Omeros stock is owned by institutions. Institutional ownership can be a sign of analyst confidence in the fundamentals of the stock.

Institutional Buying and Selling by Quarter

This chart shows the instiutional buying and selling at OMER by year and by quarter.

Skip Institutional Buying and Selling Chart and Table DataRead Chart Data in Institutional Trading History Table

Omeros Institutional Trading History

Reporting DateHedge FundShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
5/16/2026The Manufacturers Life Insurance Company 18,454$0.20M0.0%-7.0%0.025%Search for SEC Filing on Google Icon
5/16/2026Quantinno Capital Management LP61,541$0.65M0.0%+145.4%0.085%Search for SEC Filing on Google Icon
5/16/2026Polar Asset Management Partners Inc.200,000$2.11M0.0%-25.6%0.276%Search for SEC Filing on Google Icon
5/14/2026Sei Investments Co.13,171$0.14M0.0%-58.5%0.018%Search for SEC Filing on Google Icon
5/7/2026Dimensional Fund Advisors LP179,594$1.90M0.0%+85.2%0.249%Search for SEC Filing on Google Icon
5/6/2026Assetmark Inc.3,600$38K0.0%N/A0.005%Search for SEC Filing on Google Icon
5/5/2026NFSG Corp47,710$0.50M0.1%+39.1%0.066%Search for SEC Filing on Google Icon
5/5/2026Avantax Planning Partners Inc.21,100$0.22M0.0%+59.8%0.029%Search for SEC Filing on Google Icon
5/2/2026International Assets Investment Management LLC5,800$61K0.0%+16.0%0.008%Search for SEC Filing on Google Icon
5/1/2026Fifth Third Bancorp39,000$0.41M0.0%+3,800.0%0.054%Search for SEC Filing on Google Icon
4/27/2026Leonteq Securities AG10,000$0.11M0.0%N/A0.014%Search for SEC Filing on Google Icon
3/9/2026Corient Private Wealth LLC688,025$11.82M0.0%+13.0%0.970%Search for SEC Filing on Google Icon
3/3/2026Caitong International Asset Management Co. Ltd9,276$0.16M0.0%N/A0.013%Search for SEC Filing on Google Icon
2/19/2026Invesco Ltd.154,782$2.66M0.0%+26.8%0.218%Search for SEC Filing on Google Icon
2/19/2026Corient Private Wealth LLC687,325$11.81M0.0%+12.9%0.969%Search for SEC Filing on Google Icon
2/18/2026Virtus Investment Advisers LLC26,212$0.45M0.1%N/A0.037%Search for SEC Filing on Google Icon
2/18/2026Wellington Management Group LLP202,617$3.48M0.0%+4.2%0.286%Search for SEC Filing on Google Icon
2/18/2026Susquehanna Portfolio Strategies LLC92,759$1.59M0.0%-45.8%0.131%Search for SEC Filing on Google Icon
2/18/2026Millennium Management LLC441,811$7.59M0.0%+10.0%0.623%Search for SEC Filing on Google Icon
2/18/2026Man Group plc27,099$0.47M0.0%N/A0.038%Search for SEC Filing on Google Icon
2/18/2026Engineers Gate Manager LP20,082$0.35M0.0%N/A0.028%Search for SEC Filing on Google Icon
2/17/2026Schonfeld Strategic Advisors LLC12,667$0.22M0.0%N/A0.018%Search for SEC Filing on Google Icon
2/17/2026AQR Capital Management LLC22,838$0.39M0.0%+7.2%0.032%Search for SEC Filing on Google Icon
2/17/2026Abel Hall LLC10,240$0.18M0.0%N/A0.014%Search for SEC Filing on Google Icon
2/17/2026Jump Financial LLC228,000$3.92M0.0%N/A0.322%Search for SEC Filing on Google Icon
2/17/2026Farallon Capital Management LLC23,000$0.40M0.0%N/A0.032%Search for SEC Filing on Google Icon
2/17/2026Price T Rowe Associates Inc. MD95,745$1.64M0.0%+6.9%0.135%Search for SEC Filing on Google Icon
2/17/2026Osaic Holdings Inc.7,547$0.13M0.0%+34.6%0.011%Search for SEC Filing on Google Icon
2/17/2026Russell Investments Group Ltd.14,014$0.24M0.0%+31.0%0.020%Search for SEC Filing on Google Icon
2/17/2026Graham Capital Management L.P.13,222$0.23M0.0%-61.6%0.019%Search for SEC Filing on Google Icon
2/16/2026Verition Fund Management LLC63,493$1.09M0.0%N/A0.090%Search for SEC Filing on Google Icon
2/16/2026MML Investors Services LLC77,875$1.34M0.0%+31.6%0.110%Search for SEC Filing on Google Icon
2/16/2026Arax Advisory Partners5,255$90K0.0%+56.4%0.007%Search for SEC Filing on Google Icon
2/16/2026Barclays PLC120,490$2.07M0.0%-8.7%0.170%Search for SEC Filing on Google Icon
2/13/2026Stifel Financial Corp1,809,766$31.08M0.0%-0.1%2.553%Search for SEC Filing on Google Icon
2/13/2026Rafferty Asset Management LLC12,226$0.21M0.0%N/A0.017%Search for SEC Filing on Google Icon
2/13/2026Itau Unibanco Holding S.A.180,000$3.05M0.1%N/A0.254%Search for SEC Filing on Google Icon
2/13/2026Charles Schwab Investment Management Inc.593,222$10.19M0.0%+7.2%0.837%Search for SEC Filing on Google Icon
2/13/2026State Street Corp1,573,526$27.03M0.0%+26.9%2.219%Search for SEC Filing on Google Icon
2/13/2026Caitong International Asset Management Co. Ltd1,933$33K0.1%N/A0.003%Search for SEC Filing on Google Icon
2/12/2026MetLife Investment Management LLC36,200$0.62M0.0%+76.6%0.051%Search for SEC Filing on Google Icon
2/12/2026Dimensional Fund Advisors LP96,948$1.67M0.0%N/A0.137%Search for SEC Filing on Google Icon
2/12/2026Mindset Wealth Management LLC52,000$0.89M0.2%-13.3%0.073%Search for SEC Filing on Google Icon
2/12/2026Informed Momentum Co LLC207,480$3.56M0.4%N/A0.293%Search for SEC Filing on Google Icon
2/12/2026New York State Common Retirement Fund20,713$0.36M0.0%+81.5%0.029%Search for SEC Filing on Google Icon
2/12/2026Nuveen LLC153,187$2.63M0.0%+74.8%0.216%Search for SEC Filing on Google Icon
2/11/2026Deutsche Bank AG48,694$0.84M0.0%+19.3%0.069%Search for SEC Filing on Google Icon
2/11/2026Cerity Partners LLC30,450$0.52M0.0%+6.1%0.043%Search for SEC Filing on Google Icon
2/11/2026Los Angeles Capital Management LLC30,920$0.53M0.0%N/A0.044%Search for SEC Filing on Google Icon
2/11/2026State of Wyoming1,433$25K0.0%N/A0.002%Search for SEC Filing on Google Icon
2/10/2026Goldman Sachs Group Inc.227,294$3.90M0.0%-32.4%0.321%Search for SEC Filing on Google Icon
2/10/2026AXQ Capital LP29,151$0.50M0.1%N/A0.041%Search for SEC Filing on Google Icon
2/10/2026Intech Investment Management LLC29,967$0.52M0.0%+16.9%0.042%Search for SEC Filing on Google Icon
2/9/2026Geode Capital Management LLC1,631,350$28.03M0.0%+6.3%2.301%Search for SEC Filing on Google Icon
2/9/2026AlphaQuest LLC82,597$1.42M0.1%+8,259,600.0%0.116%Search for SEC Filing on Google Icon
2/9/2026Harbour Investments Inc.21,835$0.38M0.0%+62.1%0.031%Search for SEC Filing on Google Icon
2/9/2026Coldstream Capital Management Inc.53,605$0.92M0.0%+107.5%0.076%Search for SEC Filing on Google Icon
2/6/2026ProShare Advisors LLC15,171$0.26M0.0%+12.1%0.021%Search for SEC Filing on Google Icon
2/6/2026HighTower Advisors LLC104,059$1.79M0.0%+9.3%0.147%Search for SEC Filing on Google Icon
2/5/2026AlphaCore Capital LLC17,647$0.30M0.0%N/A0.025%Search for SEC Filing on Google Icon
2/5/2026Avantax Planning Partners Inc.13,200$0.23M0.0%+30.7%0.019%Search for SEC Filing on Google Icon
2/3/2026International Assets Investment Management LLC5,000$86K0.0%-67.8%0.007%Search for SEC Filing on Google Icon
1/29/2026Comerica Bank38,000$0.65M0.0%+8.6%0.054%Search for SEC Filing on Google Icon
1/29/2026UBS Group AG2,222,982$38.18M0.0%+213.5%3.135%Search for SEC Filing on Google Icon
1/29/2026Vanguard Group Inc.4,013,315$68.93M0.0%+19.9%5.661%Search for SEC Filing on Google Icon
1/29/2026China Universal Asset Management Co. Ltd.16,553$0.28M0.0%-24.5%0.023%Search for SEC Filing on Google Icon
1/23/2026Farther Finance Advisors LLC7,106$0.12M0.0%+16.5%0.010%Search for SEC Filing on Google Icon
1/21/2026Newbridge Financial Services Group Inc.34,310$0.59M0.1%-74.5%0.048%Search for SEC Filing on Google Icon
1/16/2026Empirical Financial Services LLC d.b.a. Empirical Wealth Management10,500$0.18M0.0%-74.1%0.015%Search for SEC Filing on Google Icon
1/9/2026SG Americas Securities LLC18,825$0.32M0.0%-58.5%0.027%Search for SEC Filing on Google Icon
1/8/2026Wealth Enhancement Advisory Services LLC31,728$0.55M0.0%+9.0%0.045%Search for SEC Filing on Google Icon
1/1/2026JPMorgan Chase & Co.416,153$1.71M0.0%+1,201.1%0.587%Search for SEC Filing on Google Icon
11/17/2025Nomura Holdings Inc.43,681$0.18M0.0%-50.6%0.064%Search for SEC Filing on Google Icon
11/17/2025Millennium Management LLC401,814$1.65M0.0%+49.1%0.590%Search for SEC Filing on Google Icon
11/17/2025MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.30,186$0.12M0.0%-5.2%0.044%Search for SEC Filing on Google Icon
11/17/2025Brevan Howard Capital Management LP129,393$0.53M0.0%+22.9%0.190%Search for SEC Filing on Google Icon
11/14/2025Two Sigma Investments LP933,314$3.83M0.0%+39.3%1.371%Search for SEC Filing on Google Icon
11/14/2025Bridgeway Capital Management LLC56,715$0.23M0.0%+78.8%0.083%Search for SEC Filing on Google Icon
11/14/2025Squarepoint Ops LLC155,496$0.64M0.0%+75.8%0.228%Search for SEC Filing on Google Icon
11/14/2025Newbridge Financial Services Group Inc.134,510$0.55M0.1%+44.0%0.198%Search for SEC Filing on Google Icon
11/13/2025UBS Group AG709,089$2.91M0.0%-18.4%1.042%Search for SEC Filing on Google Icon
11/13/2025BNP Paribas Financial Markets88,117$0.36M0.0%+248.7%0.129%Search for SEC Filing on Google Icon
11/13/2025Russell Investments Group Ltd.10,695$44K0.0%+113.1%0.016%Search for SEC Filing on Google Icon
11/12/2025Intech Investment Management LLC25,643$0.11M0.0%-24.8%0.038%Search for SEC Filing on Google Icon
11/10/2025China Universal Asset Management Co. Ltd.21,929$90K0.0%+86.3%0.032%Search for SEC Filing on Google Icon
11/7/2025GSA Capital Partners LLP10,004$41K0.0%-73.8%0.015%Search for SEC Filing on Google Icon
11/7/2025Vanguard Group Inc.3,346,958$13.72M0.0%+1.9%4.918%Search for SEC Filing on Google Icon
11/7/2025JPMorgan Chase & Co.416,153$1.71M0.0%+1,201.1%0.611%Search for SEC Filing on Google Icon
11/6/2025Rhumbline Advisers105,873$0.43M0.0%+7.1%0.156%Search for SEC Filing on Google Icon
11/5/2025Stordahl Capital Management Inc.22,860$94K0.0%-30.0%0.034%Search for SEC Filing on Google Icon
10/29/2025Wealth Enhancement Advisory Services LLC29,097$0.13M0.0%+11.2%0.043%Search for SEC Filing on Google Icon
10/23/2025SG Americas Securities LLC45,324$0.19M0.0%+99.7%0.067%Search for SEC Filing on Google Icon
10/9/2025Voya Investment Management LLC11,189$46K0.0%-29.7%0.016%Search for SEC Filing on Google Icon
9/26/2025Corient Private Wealth LLC530,614$1.59M0.0%-26.3%0.780%Search for SEC Filing on Google Icon
8/19/2025B. Riley Wealth Advisors Inc.10,760$32K0.0%N/A0.017%Search for SEC Filing on Google Icon
8/19/2025Newbridge Financial Services Group Inc.93,420$0.28M0.0%N/A0.151%Search for SEC Filing on Google Icon
8/18/2025Nomura Holdings Inc.88,469$0.27M0.0%-87.0%0.143%Search for SEC Filing on Google Icon
8/15/2025Tower Research Capital LLC TRC 13,414$40K0.0%+829.6%0.022%Search for SEC Filing on Google Icon
8/15/2025Corient Private Wealth LLC530,614$1.59M0.0%-26.3%0.859%Search for SEC Filing on Google Icon
8/15/2025BNP Paribas Financial Markets25,272$76K0.0%+548.7%0.041%Search for SEC Filing on Google Icon
Data available starting January 2016

See Full Table
Omeros logo
Omeros Corporation, a clinical-stage biopharmaceutical company, discovers, develops, and commercializes small-molecule and protein therapeutics, and orphan indications targeting immunologic diseases, including complement-mediated diseases, cancers, and addictive and compulsive disorders. The company's products under development include Narsoplimab (OMS721/MASP-2) that has completed pivotal trial for hematopoietic stem-cell transplant-associated thrombotic microangiopathy (TA-TMA); that is in Phase III clinical trial for the treatment of immunoglobulin A nephropathy (IgAN); and Phase II clinical trial to treat COVID-19. It also develops OMS1029 that is in phase I clinical trials for long-acting second-generation antibody targeting lectin pathway disorders; OMS906 that has completed phase II clinical trials for Paroxysmal nocturnal hemoglobinuria, complement 3 glomerulopathy, and other alternative pathway disorders; and OMS527 that is in phase I clinical trials for addictions and compulsive disorders, and movement disorders. In addition, the company's products under preclinical development comprise MASP-2, a pro-inflammatory protein target for the treatment of lectin pathway disorders; MASP-3 small-molecule inhibitors for alternative pathway disorders; and Adoptive T-Cell and Chimeric Antigen Receptor (CAR) T-Cell Therapies and Immunomodulators/Immunotoxins/Cancer Vaccines for the treatment of various cancers. Omeros Corporation was incorporated in 1994 and is headquartered in Seattle, Washington.
Read More on Omeros

Today's Range

Now: $11.70
Low: $11.66
High: $12.35

50 Day Range

MA: $12.27
Low: $9.81
High: $14.83

52 Week Range

Now: $11.70
Low: $2.95
High: $17.65

Volume

1,987,407 shs

Average Volume

1,331,096 shs

Market Capitalization

$846.85 million

P/E Ratio

16.71

Dividend Yield

N/A

Beta

2.66

Who are the company insiders with the largest holdings of Omeros?

Omeros' top insider shareholders include:
  1. Gregory A Md Demopulos (CEO)
  2. Marcia S Kelbon (VP)
  3. Peter A Md Demopulos (Director)
  4. Marcia S Kelbon (VP)
  5. Thomas J Cable (Director)
  6. Arnold C Hanish (Director)
  7. Michael A Jacobsen (CAO)
  8. Michael A Jacobsen (VP)
  9. Arnold C Hanish (Director)
  10. David J Borges (CAO)
Learn More about top insider investors at Omeros.

Who are the major institutional investors of Omeros?

Omeros' top institutional investors include:
  1. Polar Asset Management Partners Inc. — 0.28%
  2. Dimensional Fund Advisors LP — 0.25%
  3. Quantinno Capital Management LP — 0.09%
  4. NFSG Corp — 0.07%
  5. Fifth Third Bancorp — 0.05%
  6. Avantax Planning Partners Inc. — 0.03%
Learn More about top institutional investors of Omeros stock.

Which institutional investors are selling Omeros stock?

Within the last quarter, OMER stock was sold by these institutional investors:
  1. Polar Asset Management Partners Inc.
  2. Sei Investments Co.
  3. The Manufacturers Life Insurance Company

Which institutional investors are buying Omeros stock?

Within the previous quarter, OMER stock was purchased by institutional investors including:
  1. Dimensional Fund Advisors LP
  2. Fifth Third Bancorp
  3. Quantinno Capital Management LP
  4. NFSG Corp
  5. Leonteq Securities AG
  6. Avantax Planning Partners Inc.
  7. Assetmark Inc.
  8. International Assets Investment Management LLC

Omeros Active Insiders

Gregory A Md Demopulos
Gregory A Md Demopulos (Age 67)
CEO
Michael A Jacobsen (Age 67)
CAO
David J Borges
David J Borges (Age 62)
CAO
1 recent trades
Peter A Md Demopulos
Director