ARCELLX INC (ACLX) Institutional Ownership Changes & 13F Activity

ARCELLX INC (ACLX). 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 Fmr Llc, T. Rowe Price Investment Management, Inc., Pentwater Capital Management Lp, Fil Ltd, and Hbk Investments L P.

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
Catalio Capital Management, LpSell-156,109-100.0%0$0.00Q1 2026Sep 02, 2026
Torno Capital, LlcBuy+7,285—7,285$836.46KQ1 2026Aug 17, 2026
O'Connor Alternative Investments LlcBuy+450,504—450,504$51.73MQ1 2026Aug 14, 2026
Mirae Asset Global Investments Co., Ltd.Buy+240+8.5%3,050$350.20KQ1 2026Aug 12, 2026
Wells Fargo & Company/MnSell-39,867-73.5%14,393$1.65MQ1 2026Jul 08, 2026
Oddo Bhf Asset Management SasBuy+115,000—115,000$13.20MQ1 2026May 18, 2026
Bank Of America CorpBuy+24,564+5.7%452,333$51.94MQ1 2026May 18, 2026
California State Teachers Retirement SystemBuy+7,771+28.7%34,886$4.01MQ1 2026May 18, 2026
Adar1 Capital Management, LlcBuy+600+1.9%32,084$3.68MQ1 2026May 18, 2026
Fmr LlcSell-3,444,350-96.7%119,378$13.71MQ1 2026May 15, 2026
T. Rowe Price Investment Management, Inc.Sell-3,397,645-60.1%2,255,878$259.02MQ1 2026May 15, 2026
Pentwater Capital Management LpBuy+2,870,000—2,870,000$329.53MQ1 2026May 15, 2026
Fil LtdBuy+2,339,192—2,339,192$268.59MQ1 2026May 15, 2026
Hbk Investments L PBuy+2,278,517—2,278,517$261.62MQ1 2026May 15, 2026
Price T Rowe Associates IncSell-1,564,847-97.1%45,954$5.28MQ1 2026May 15, 2026
Citadel Advisors LlcSell-1,478,417-98.5%21,806$2.50MQ1 2026May 15, 2026
Janus Henderson Group PlcSell-829,298-90.2%90,280$10.37MQ1 2026May 15, 2026
Goldman Sachs Group IncBuy+643,675+96.3%1,312,155$150.66MQ1 2026May 15, 2026
Woodline Partners LpSell-614,074-83.2%123,750$14.21MQ1 2026May 15, 2026
Tig Advisors, LlcBuy+541,378—541,378$62.16MQ1 2026May 15, 2026
Alliancebernstein L.P.Buy+503,436+1234.2%544,227$35.48MQ1 2026May 15, 2026
Millennium Management LlcBuy+494,025+5600.6%502,846$57.74MQ1 2026May 15, 2026
Balyasny Asset Management L.P.Buy+479,763—479,763$55.09MQ1 2026May 15, 2026
Tudor Investment Corp Et AlBuy+416,559+905.0%462,588$53.11MQ1 2026May 15, 2026
Morgan StanleyBuy+407,409+78.6%925,813$106.30MQ1 2026May 15, 2026
Nexpoint Asset Management, L.P.Buy+373,150—373,150$42.85MQ1 2026May 15, 2026
State Street CorpSell-322,608-16.1%1,675,895$192.43MQ1 2026May 15, 2026
Aqr Arbitrage LlcBuy+231,730—231,730$26.61MQ1 2026May 15, 2026
Lmr Partners LlpBuy+212,495—212,495$24.40MQ1 2026May 15, 2026
Qube Research & Technologies LtdBuy+205,941+210.3%303,847$34.89MQ1 2026May 15, 2026
Showing 30 of 281

Frequently asked questions about ACLX activity

  • Which institutional owners are buying ACLX?

    Institutional owners buying ACLX 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 ACLX activity?

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

  • Is institutional interest in ACLX increasing?

    Institutional interest in ACLX 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.