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Arcellx, Inc.

ACLXDelisted Apr 28, 2026
Industry
Biological Products, (No Diagnostic Substances)
SEC CIK
0001786205

Arcellx, Inc. was delisted on Apr 28, 2026; its insiders filed their last Form 4 on Apr 28, 2026; 240 institutions reported holding it in 13F filings for Q1 2026, worth $6.52B in total; Soros Fund Management was the only superinvestor holding it.

Q3 2024 vs. Q2 2024

How the institutions holding Arcellx, Inc. changed between Q2 2024 and Q3 2024.

All holders in Q3 2024All holders in Q2 2024

13F holders of ACLX: Q2 2024 compared with Q3 2024
MeasureQ2 2024Of which not filed for Q3 2024Q3 2024Change
Holders1672186+21
Shares50.2M3.52M49.5M+2.76M (+5.9%)
Value$2.77B$194.1M$4.13B+$1.56B (+60.3%)

2 institutions that held it in Q2 2024 haven't filed for Q3 2024 yet. Not filing isn't selling, so the changes leave them out.

New holders (39)

Institutions that held Arcellx, Inc. at the end of Q3 2024 but not at the end of Q2 2024.

Institutions new to ACLX in Q3 2024
InstitutionSharesValue% of portfolio
BlackRock, Inc.4,246,692$354.6M0.01%
First Turn Management, LLC214,298$17.9M2.83%
Dimensional Fund Advisors LP119,075$9.94M0.00%
Standard Life Aberdeen plc50,796$4.24M0.01%
Edmond de Rothschild Holding S.A.45,480$3.80M0.06%
Caption Management, LLC37,580$3.14M0.34%
Nicholas Investment Partners, LP36,586$3.06M0.28%
Rhenman & Partners Asset Management AB32,000$2.67M0.22%
Dark Forest Capital Management LP27,603$2.31M0.29%
Citadel Advisors LLC17,087$1.43M0.00%
FORA Capital, LLC12,935$1.08M0.13%
SG Americas Securities, LLC12,035$1.00M0.00%
Intech Investment Management LLC9,579$799.9K0.01%
D. E. Shaw & Co., Inc.6,305$526.5K0.00%
GTS Securities LLC4,739$395.8K0.01%
Tudor Investment Corp Et Al4,409$368.2K0.00%
Legato Capital Management LLC4,408$368.1K0.05%
Bellevue Group AG4,000$334.0K0.01%
Envestnet Asset Management Inc3,746$312.8K0.00%
Group One Trading, L.P.3,709$309.7K0.01%
Glenmede Trust Co NA3,615$301.9K0.00%
Pictet Asset Management Holding SA3,519$293.9K0.00%
Entropy Technologies, LP3,509$293.0K0.03%
Mackenzie Financial Corp3,301$275.7K0.00%
Nomura Holdings Inc3,197$267.0K0.00%
Prudential Financial Inc3,120$260.6K0.00%
Advisory Alpha, LLC3,000$250.5K0.01%
Acadian Asset Management LLC2,953$246.0K0.00%
Xponance, Inc.2,844$237.5K0.00%
JustInvest LLC2,597$216.8K0.00%
EntryPoint Capital, LLC2,501$208.9K0.12%
Torno Capital, LLC2,000$167.0K0.22%
Quarry LP1,500$125.3K0.04%
Catalyst Funds Management Pty Ltd400$33.4K0.01%
Sterling Capital Management LLC44$3.67K0.00%
Bessemer Group Inc30$3.00K0.00%
Wolff Wiese Magana LLC17$1.42K0.00%
Parallel Advisors, LLC10$8350.00%
J.Safra Asset Management Corp5$4140.00%

Sold out (18)

Institutions that held Arcellx, Inc. at the end of Q2 2024 and filed for Q3 2024 without it.

Institutions that sold out of ACLX in Q3 2024
InstitutionShares, Q2 2024Value, Q2 2024
Man Group plc104,046$5.74M
Superstring Capital Management LP59,133$3.26M
Twinbeech Capital LP53,585$2.96M
Walleye Capital LLC41,144$2.27M
Algert Global LLC35,211$1.94M
Renaissance Technologies LLC27,072$1.49M
Schonfeld Strategic Advisors LLC23,148$1.28M
Connor, Clark & Lunn Investment Management Ltd.22,492$1.24M
Squarepoint Ops LLC15,829$873.6K
State of New Jersey Common Pension Fund D11,756$648.8K
Engineers Gate Manager LP11,228$619.7K
Winton Group Ltd8,761$483.5K
Corton Capital Inc.6,273$346.2K
Clough Capital Partners L P4,800$264.9K
Bridgefront Capital, LLC4,641$256.1K
National Bank of Canada1,500$80.4K
State of Wyoming1,250$69.0K
Pacer Advisors, Inc.488$26.9K

Not filed for Q3 2024 yet (2)

Institutions that held Arcellx, Inc. at the end of Q2 2024 and haven't filed a 13F for Q3 2024. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding ACLX in Q2 2024 that haven't filed for Q3 2024
InstitutionShares, Q2 2024Value, Q2 2024
BlackRock Inc.3,516,364$194.1M
Institutional & Family Asset Management, LLC8$442