OMEROS CORP (OMER) Institutional Ownership Changes & 13F Activity

OMEROS CORP (OMER). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Invesco Ltd., Rock Springs Capital Management Lp, Rubric Capital Management Lp, Citadel Advisors Llc, and Susquehanna International Group, Llp.

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
Manufacturers Life Insurance Company, TheBuy+511+2.8%18,965$180.36KQ2 2026Sep 09, 2026
Citadel Advisors LlcSell-174,454-67.1%85,594$814.00KQ2 2026Sep 02, 2026
Corient Private Wealth LlcSell-141,681-17.7%659,730$6.27MQ2 2026Aug 27, 2026
Optimize Financial IncSell-133-0.3%38,274$363.99KQ2 2026Aug 27, 2026
California State Teachers Retirement SystemBuy+71,978+1918.4%75,730$720.19KQ2 2026Aug 24, 2026
Invesco Ltd.Buy+751,771751,771$7.15MQ2 2026Aug 14, 2026
Rock Springs Capital Management LpBuy+718,499718,499$6.83MQ2 2026Aug 14, 2026
Rubric Capital Management LpBuy+656,874656,874$6.25MQ2 2026Aug 14, 2026
Susquehanna International Group, LlpSell-159,836-33.0%325,194$3.09MQ2 2026Aug 14, 2026
Caption Management, LlcBuy+130,000130,000$1.24MQ2 2026Aug 14, 2026
Jane Street Group, LlcSell-125,141-86.1%20,166$191.78KQ2 2026Aug 14, 2026
Ameriprise Financial IncBuy+117,456117,456$1.12MQ2 2026Aug 14, 2026
Two Sigma Investments, LpBuy+116,188+40.6%402,662$3.83MQ2 2026Aug 14, 2026
Ingalls & Snyder LlcBuy+100,100+2.8%3,659,523$34.80MQ2 2026Aug 14, 2026
Millennium Management LlcSell-66,770-16.3%343,839$3.27MQ2 2026Aug 14, 2026
Squarepoint Ops LlcBuy+55,03055,030$523.34KQ2 2026Aug 14, 2026
Balyasny Asset Management L.P.Buy+54,475+187.3%83,558$794.64KQ2 2026Aug 14, 2026
Ancora Advisors LlcBuy+53,750+46.7%168,750$1.60MQ2 2026Aug 14, 2026
Susquehanna Portfolio Strategies, LlcSell-51,004-55.0%41,755$397.09KQ2 2026Aug 14, 2026
State Of Wisconsin Investment BoardBuy+48,540+411.4%60,339$573.82KQ2 2026Aug 14, 2026
Brevan Howard Capital Management LpBuy+46,884+91.6%98,047$932.43KQ2 2026Aug 14, 2026
Goldman Sachs Group IncSell-45,885-22.6%157,008$1.49MQ2 2026Aug 14, 2026
Legal & General Group PlcBuy+38,618+636.4%44,686$424.96KQ2 2026Aug 14, 2026
Wells Fargo & Company/MnBuy+38,546+32.6%156,889$1.49MQ2 2026Aug 14, 2026
Coldstream Capital Management IncBuy+30,613+56.6%84,743$805.91KQ2 2026Aug 14, 2026
Atom Investors LpBuy+23,94523,945$227.72KQ2 2026Aug 14, 2026
Price T Rowe Associates IncBuy+22,257+20.7%129,550$1.23MQ2 2026Aug 14, 2026
Charles Schwab Investment Management IncBuy+22,121+3.8%604,633$5.75MQ2 2026Aug 14, 2026
Group One Trading LlcBuy+20,093+52.0%58,697$558.21KQ2 2026Aug 14, 2026
Wellington Management Group LlpBuy+17,241+9.2%204,541$1.95MQ2 2026Aug 14, 2026
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Frequently asked questions about OMER activity

  • Which institutional owners are buying OMER?

    Institutional owners buying OMER include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in OMER activity?

    "Buy" means an investor increased their reported position in OMER compared to the prior reporting period. This reflects growing exposure to OMEROS CORP (OMER) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in OMER increasing?

    Institutional interest in OMER can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.