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 (Q1 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Vanguard Capital Management Llc, Squadron Capital Management Llc, Bank Of America Corp, Mpm Bioimpact Llc, and Renaissance Technologies LLC.

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
Bank Of America CorpSell-472,967-64.1%264,583$220.13KQ1 2026May 18, 2026
Squadron Capital Management LlcBuy+563,535—563,535$469.20KQ1 2026May 15, 2026
Mpm Bioimpact LlcSell-184,747-13.3%1,208,810$1.01MQ1 2026May 15, 2026
Alyeska Investment Group, L.P.Sell-149,151-63.3%86,554$72.06KQ1 2026May 15, 2026
Millennium Management LlcSell-108,059-45.0%132,050$109.94KQ1 2026May 15, 2026
Geode Capital Management, LlcBuy+53,601+16.0%389,487$324.36KQ1 2026May 15, 2026
Xtx Topco LtdBuy+50,929—50,929$42.40KQ1 2026May 15, 2026
Verdad Advisers, LpBuy+29,760—29,760$24.78KQ1 2026May 15, 2026
Morgan StanleySell-12,203-26.5%33,799$28.14KQ1 2026May 15, 2026
Citadel Advisors LlcBuy+10,382—10,382$8.64KQ1 2026May 15, 2026
Goldman Sachs Group IncBuy+4,193+12.3%38,266$31.86KQ1 2026May 15, 2026
Fmr LlcSell-3,592-98.9%39$32.00Q1 2026May 15, 2026
Barclays PlcSell-1-0.0%13,235$11.02KQ1 2026May 15, 2026
Renaissance Technologies LLCSell-161,548-23.8%516,218$429.80KQ1 2026May 14, 2026
Raymond James Financial IncBuy+19,778—19,778$16.47KQ1 2026May 14, 2026
Hrt Financial LpBuy+17,861—17,861$14.00KQ1 2026May 14, 2026
Simplex Trading, LlcBuy+8,472+35.2%32,526$27.09KQ1 2026May 14, 2026
Blackrock, Inc.Sell-35-0.0%101,608$84.60KQ1 2026May 13, 2026
Arax Advisory PartnersSell-27-69.2%12$32.00Q1 2026May 13, 2026
Jane Street Group, LlcSell-74,486-47.3%82,836$68.97KQ1 2026May 12, 2026
Bnp Paribas Financial MarketsSell-2-0.3%790$658.00Q1 2026May 12, 2026
Citigroup IncBuy+3,383+338300.0%3,384$2.82KQ1 2026May 11, 2026
Vanguard Capital Management LlcBuy+1,217,976—1,217,976$1.01MQ1 2026May 08, 2026
Vanguard Fiduciary Trust CoBuy+157,726—157,726$131.39KQ1 2026May 08, 2026
Vanguard Global Advisers, LlcBuy+10,343—10,343$8.62KQ1 2026May 08, 2026
Northwestern Mutual Wealth Management CoBuy+200—200$167.00Q1 2026May 07, 2026
Lpl Financial LlcBuy+10,000—10,000$8.33KQ1 2026May 06, 2026
Ubs Group AgBuy+6,149+10.1%66,857$55.69KQ1 2026May 05, 2026
Lynx1 Capital Management LpBuy+1,860+0.3%657,786$547.67KQ1 2026May 04, 2026
Sbi Securities Co., Ltd.Buy+40+100.0%80$67.00Q1 2026Apr 28, 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.