WEREWOLF THERAPEUTICS INC (HOWL) Institutional Ownership Changes & 13F Activity

WEREWOLF THERAPEUTICS INC (HOWL). 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 Ra Capital Management, L.P., Balyasny Asset Management L.P., Mpm Bioimpact Llc, Squadron Capital Management Llc, and Verdad Advisers, Lp.

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
Ra Capital Management, L.P.Sell-4,293,563-64.3%2,387,744$859.35KQ2 2026Aug 14, 2026
Balyasny Asset Management L.P.Buy+1,790,0891,790,089$644.25KQ2 2026Aug 14, 2026
Mpm Bioimpact LlcSell-1,128,668-93.4%80,142$28.85KQ2 2026Aug 14, 2026
Verdad Advisers, LpBuy+318,949+1071.7%348,709$125.50KQ2 2026Aug 14, 2026
Xtx Topco LtdBuy+220,549+433.1%271,478$97.70KQ2 2026Aug 14, 2026
Jane Street Group, LlcBuy+169,001+204.0%251,837$90.64KQ2 2026Aug 14, 2026
Squarepoint Ops LlcBuy+103,242103,242$37.16KQ2 2026Aug 14, 2026
Rangeley Capital, LlcBuy+100,000100,000$35.99KQ2 2026Aug 14, 2026
Millennium Management LlcSell-69,995-53.0%62,055$22.33KQ2 2026Aug 14, 2026
Bank Of America CorpBuy+46,919+17.7%311,502$111.83KQ2 2026Aug 14, 2026
Two Sigma Investments, LpBuy+27,30027,300$9.82KQ2 2026Aug 14, 2026
Goldman Sachs Group IncSell-18,243-47.7%20,023$7.21KQ2 2026Aug 14, 2026
Renaissance Technologies LLCBuy+158,414+30.7%674,632$242.80KQ2 2026Aug 13, 2026
Ubs Group AgBuy+148,981+222.8%215,838$77.70KQ2 2026Aug 13, 2026
Virtu Financial LlcBuy+45,46745,467$16.00KQ2 2026Aug 13, 2026
Morgan StanleySell-14,691-43.5%19,108$6.88KQ2 2026Aug 13, 2026
Geode Capital Management, LlcSell-53,672-13.8%335,815$120.89KQ2 2026Aug 12, 2026
Simplex Trading, LlcSell-32,271-99.2%255$91.00Q2 2026Aug 12, 2026
Stonex Group Inc.Buy+20,00020,000$9.00KQ2 2026Aug 12, 2026
Jpmorgan Chase & CoBuy+2,1082,108$650.00Q2 2026Aug 12, 2026
Tower Research Capital Llc (Trc)Buy+9,8979,897$3.56KQ2 2026Aug 11, 2026
Lpl Financial LlcBuy+1,791+17.9%11,791$4.24KQ2 2026Aug 07, 2026
Blackrock, Inc.Sell-35-0.0%101,573$36.56KQ2 2026Aug 07, 2026
Gsa Capital Partners LlpBuy+27,14627,146$10.00KQ2 2026Aug 06, 2026
Marest Capital, LlcBuy+10,87010,870$3.91KQ2 2026Aug 05, 2026
Ranch Capital Advisors Inc.Sell-1,000-8.3%11,000$3.96KQ2 2026Aug 03, 2026
Sbi Securities Co., Ltd.Buy+20+25.0%100$36.00Q2 2026Jul 23, 2026
Squadron Capital Management LlcSell-563,535-100.0%0$0.00Q2 2026May 15, 2026
Bridgeway Capital Management, LlcSell-77,000-100.0%0$0.00Q2 2026May 15, 2026
Citadel Advisors LlcSell-10,382-100.0%0$0.00Q2 2026May 15, 2026
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Frequently asked questions about HOWL activity

  • Which institutional owners are buying HOWL?

    Institutional owners buying HOWL 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 HOWL activity?

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

  • Is institutional interest in HOWL increasing?

    Institutional interest in HOWL 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.