Zenas BioPharma, Inc. (ZBIO) Institutional Ownership Changes & 13F Activity

Zenas BioPharma, Inc. (ZBIO). 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 Price T Rowe Associates Inc, Bank Of America Corp, Two Sigma Investments, Lp, Wellington Management Group Llp, and Alliancebernstein L.P..

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
Manufacturers Life Insurance Company, TheBuy+8,0328,032$203.85KQ2 2026Sep 09, 2026
Citadel Advisors LlcBuy+128,910+192.8%195,780$4.97MQ2 2026Sep 02, 2026
California State Teachers Retirement SystemBuy+13,652+86.3%29,471$747.97KQ2 2026Aug 24, 2026
Price T Rowe Associates IncBuy+869,662+243.4%1,226,928$31.14MQ2 2026Aug 14, 2026
Bank Of America CorpBuy+842,812+217.0%1,231,159$31.25MQ2 2026Aug 14, 2026
Two Sigma Investments, LpBuy+540,094+196.4%815,150$20.69MQ2 2026Aug 14, 2026
Wellington Management Group LlpBuy+347,766+27.9%1,593,819$40.45MQ2 2026Aug 14, 2026
Alliancebernstein L.P.Buy+206,067+23.0%1,103,388$21.57MQ2 2026Aug 14, 2026
Millennium Management LlcBuy+183,652+38.5%660,470$16.76MQ2 2026Aug 14, 2026
Vestal Point Capital, LpBuy+165,000+82.5%365,000$9.26MQ2 2026Aug 14, 2026
Voleon Capital Management LpBuy+137,533+464.5%167,145$4.24MQ2 2026Aug 14, 2026
Polar Capital Holdings PlcSell-135,672-5.3%2,412,772$61.24MQ2 2026Aug 14, 2026
Sio Capital Management, LlcSell-123,173-37.1%208,557$5.29MQ2 2026Aug 14, 2026
Goldman Sachs Group IncSell-110,298-28.9%271,163$6.88MQ2 2026Aug 14, 2026
Balyasny Asset Management L.P.Sell-90,353-13.5%576,717$14.64MQ2 2026Aug 14, 2026
Barclays PlcBuy+86,355+291.6%115,965$2.94MQ2 2026Aug 14, 2026
Squarepoint Ops LlcBuy+82,311+192.0%125,185$3.18MQ2 2026Aug 14, 2026
Charles Schwab Investment Management IncBuy+77,683+34.6%302,085$7.67MQ2 2026Aug 14, 2026
Verition Fund Management LlcBuy+72,98872,988$1.85MQ2 2026Aug 14, 2026
Atom Investors LpSell-69,867-65.3%37,149$942.84KQ2 2026Aug 14, 2026
Csm Advisors, LlcBuy+67,62267,622$1.72MQ2 2026Aug 14, 2026
Boothbay Fund Management, LlcBuy+33,28033,280$844.65KQ2 2026Aug 14, 2026
J. Goldman & Co LpBuy+31,435+85.4%68,232$1.73MQ2 2026Aug 14, 2026
Exome Asset Management LlcSell-28,287-35.0%52,443$1.33MQ2 2026Aug 14, 2026
Birchview Capital, LpBuy+23,601+33.7%93,601$2.38MQ2 2026Aug 14, 2026
Xtx Topco LtdBuy+20,723+107.3%40,034$1.02MQ2 2026Aug 14, 2026
Aqr Capital Management LlcSell-19,871-39.0%31,100$789.32KQ2 2026Aug 14, 2026
Invesco Ltd.Buy+18,95418,954$481.05KQ2 2026Aug 14, 2026
Wells Fargo & Company/MnBuy+17,110+192.6%25,995$659.75KQ2 2026Aug 14, 2026
Hrt Financial LpSell-16,870-65.5%8,879$225.00KQ2 2026Aug 14, 2026
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Frequently asked questions about ZBIO activity

  • Which institutional owners are buying ZBIO?

    Institutional owners buying ZBIO 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 ZBIO activity?

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

  • Is institutional interest in ZBIO increasing?

    Institutional interest in ZBIO 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.