Skip to main content
Equibles

ACLX

Arcellx, Inc.

Company with tickers: ACLX

CIK
1786205
CUSIP
03940C100
Shares Outstanding
58,506,348
13F Activity (30d)
150 filings 149 filers

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 240
Total Value: $6,650,546,014
Total Shares: 57,921,496
Showing 1–100 of 262 holdings by value · page 1 of 3

Institutional Ownership Trend

22 quarters

Superinvestors Holding ACLX

All superinvestors →
George Soros $22,964,000

Holder Concentration

Across 240 13F filers · Δ vs Dec 31, 2025
Top Holder
11.6%
Sep 2024 → Mar 2026 · range 10.9% – 20.4%
−8.8 pts
Top 5
38.6%
Sep 2024 → Mar 2026 · range 38.6% – 61.7%
−20.9 pts
Top 10
59.0%
Sep 2024 → Mar 2026 · range 59.0% – 80.0%
−12.9 pts
HHI
471
Sep 2024 → Mar 2026 · range 471 – 950
Broadly held−479

Quarterly Activity

vs Dec 31, 2025
New
129
Increased
50
Decreased
38
Sold Out
56
Unchanged
23
Holder count: +73
Institutional value: +394.0%
Shares held: +180.5%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP +526,843 572,101
Large TUDOR INVESTMENT CORP ET AL +421,159 467,188
Large Qube Research & Technologies Ltd +205,941 303,847
Large Man Group plc +176,678 180,000
Mega BNP PARIBAS ARBITRAGE, SA +147,953 151,558

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Large Pictet Asset Management Holding SA −338,383 4,229
Mega STATE STREET CORP −322,608 1,675,895
Large VOYA INVESTMENT MANAGEMENT LLC −162,302 6,378
Mid Affinity Asset Advisors, LLC −160,961 362,764
Mega CITIGROUP INC −148,703 7,816

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Mid GILEAD SCIENCES, INC. 6,720,803 $771,682,600
Mega BlackRock, Inc. 3,945,238 $452,992,218
Large Pentwater Capital Management LP 2,870,000 $329,533,400
Mega VANGUARD CAPITAL MANAGEMENT LLC 2,425,218 $278,463,530
Mega VANGUARD PORTFOLIO MANAGEMENT LLC 2,424,818 $278,417,602

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Large LORD, ABBETT & CO. LLC 449,634 $29,316,136
Mega AMERICAN CENTURY COMPANIES INC 419,080 $27,324,016
Mega Fisher Asset Management, LLC 322,855 $21,050,146
Mega TD Asset Management Inc 300,856 $19,615,811
Mid Integral Health Asset Management, LLC 200,000 $13,040,000
Filter: New 129 Increased 50 Reduced 38 Sold out 56 Unchanged 23
Showing 100 of 262
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Mid GILEAD SCIENCES, INC. $771,682,600 11.60% 6,720,803
Mid Paradigm Biocapital Advisors LP $662,972,517 9.97% 5,774,016
Mega BlackRock, Inc. $452,992,218 6.81% 3,945,238
Mid NEA Management Company, LLC $349,656,982 5.26% 3,045,262
Large Pentwater Capital Management LP $329,533,400 4.95% 2,870,000
Mega VANGUARD CAPITAL MANAGEMENT LLC $278,463,530 4.19% 2,425,218
Mega VANGUARD PORTFOLIO MANAGEMENT LLC $278,417,602 4.19% 2,424,818
Small SR One Capital Management, LP $269,440,056 4.05% 2,346,630
Mega FIL Ltd $268,586,025 4.04% 2,339,192
Mid HBK INVESTMENTS L P $261,619,321 3.93% 2,278,517
Mega T. Rowe Price Investment Management, Inc. $259,019,911 3.89% 2,255,878
Mega STATE STREET CORP $192,426,263 2.89% 1,675,895
Mid GLAZER CAPITAL, LLC $173,048,436 2.60% 1,507,128
Mega GOLDMAN SACHS GROUP INC $150,661,636 2.27% 1,312,155
Mega GEODE CAPITAL MANAGEMENT, LLC $118,111,429 1.78% 1,028,666
Mega MORGAN STANLEY $106,301,845 1.60% 925,813
Mega JPMORGAN CHASE & CO $68,154,048 1.02% 593,573
Mid Davidson Kempner Capital Management LP $64,258,324 0.97% 559,644
Mega ALLIANCEBERNSTEIN L.P. $62,488,144 0.94% 544,227
Mid TIG Advisors, LLC $62,161,021 0.93% 541,378
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $58,328,560 0.88% 508,000
Mega MILLENNIUM MANAGEMENT LLC $57,736,777 0.87% 502,846
Large Balyasny Asset Management L.P. $55,086,387 0.83% 479,763
Large TUDOR INVESTMENT CORP ET AL $53,114,354 0.80% 462,588
Mega BANK OF AMERICA CORP /DE/ Bank $51,936,872 0.78% 452,333
Mid Magnetar Financial LLC $45,345,977 0.68% 394,931
Mid ALPINE ASSOCIATES MANAGEMENT INC. $43,401,960 0.65% 378,000
Mid NEXPOINT ASSET MANAGEMENT, L.P. $42,845,082 0.64% 373,150
Mid Affinity Asset Advisors, LLC $41,652,562 0.63% 362,764
Mega NORTHERN TRUST CORP Bank $40,194,461 0.60% 350,065
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $39,738,283 0.60% 346,092
Mega VANGUARD FIDUCIARY TRUST CO Bank $35,427,251 0.53% 308,546
Large Qube Research & Technologies Ltd $34,887,712 0.52% 303,847
Mid First Trust Capital Management L.P. $27,354,142 0.41% 238,235
Mid AQR Arbitrage LLC $26,607,238 0.40% 231,730
Large Caption Management, LLC $25,834,500 0.39% 225,000
Micro AJU IB Investment Co., Ltd. $25,660,662 0.39% 223,486
Large LMR Partners LLP $24,398,675 0.37% 212,495
Mega BARCLAYS PLC $23,841,453 0.36% 207,642
Small EQUITEC PROPRIETARY MARKETS, LLC $23,572,546 0.35% 205,300
Mid SOROS FUND MANAGEMENT LLC $22,964,000 0.35% 200,000
Large GABELLI FUNDS LLC $22,493,238 0.34% 195,900
Mega UBS Group AG $22,356,486 0.34% 194,709
Large Verition Fund Management LLC $21,511,986 0.32% 187,354
Small WATER ISLAND CAPITAL LLC $21,059,021 0.32% 183,409
Large Man Group plc $20,667,599 0.31% 180,000
Mid Rock Springs Capital Management LP $19,503,210 0.29% 169,859
Small GABELLI & Co INVESTMENT ADVISERS, INC. $17,498,568 0.26% 152,400
Mega BNP PARIBAS ARBITRAGE, SA $17,401,889 0.26% 151,558
Mid Groupe la Francaise $17,343,101 0.26% 151,046
Mega Bank of New York Mellon Corp Bank $16,430,623 0.25% 143,099
Small CREDIT INDUSTRIEL ET COMMERCIAL $15,460,283 0.23% 134,648
Large Woodline Partners LP $14,208,975 0.21% 123,750
Small GARDNER LEWIS ASSET MANAGEMENT L P $14,145,479 0.21% 123,197
Large Hudson Bay Capital Management LP $14,111,378 0.21% 122,900
Mid PICTON MAHONEY ASSET MANAGEMENT $13,778,400 0.21% 120,000
Mega FMR LLC $13,706,980 0.21% 119,378
Small Slotnik Capital, LLC $13,548,760 0.20% 118,000
Mid ODDO BHF ASSET MANAGEMENT SAS $13,204,300 0.20% 115,000
Mid PRELUDE CAPITAL MANAGEMENT, LLC $11,349,842 0.17% 98,849
Large RENAISSANCE TECHNOLOGIES LLC $11,068,648 0.17% 96,400
Micro Chicago Capital Management, LLC $10,672,633 0.16% 92,951
Mega JANUS HENDERSON GROUP PLC $10,365,949 0.16% 90,280
Small CIBRA Capital Ltd $10,175,692 0.15% 88,623
Mega Nuveen, LLC $9,793,456 0.15% 85,294
Mega DEUTSCHE BANK AG\ Bank $9,261,839 0.14% 80,664
Mid Cinctive Capital Management LP $9,185,600 0.14% 80,000
Mid PICTON MAHONEY ASSET MANAGEMENT $8,611,500 0.13% 75,000
Mid Sagefield Capital LP $7,474,437 0.11% 65,097
Small Athos Capital Ltd $7,451,818 0.11% 64,900
Large Russell Investments Group, Ltd. $7,107,931 0.11% 61,905
Mid SAMSARA BIOCAPITAL, LLC $6,989,437 0.11% 60,873
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $6,577,919 0.10% 57,289
Mid Voleon Capital Management LP $6,512,590 0.10% 56,720
Small PSquared Asset Management AG $6,343,919 0.10% 55,251
Mega Swiss National Bank Bank $6,280,654 0.09% 54,700
Small Twin Securities, Inc. Broker-Dealer $6,198,213 0.09% 53,982
Mid Susquehanna Portfolio Strategies, LLC $5,848,701 0.09% 50,938
Small HARVEST MANAGEMENT LLC $5,741,000 0.09% 50,000
Small EQUITEC PROPRIETARY MARKETS, LLC $5,534,324 0.08% 48,200
Large CONGRESS ASSET MANAGEMENT CO $5,459,805 0.08% 47,551
Mega Invesco Ltd. $5,428,688 0.08% 47,280
Mega PRICE T ROWE ASSOCIATES INC /MD/ $5,276,438 0.08% 45,954
Mega RHUMBLINE ADVISERS $5,191,127 0.08% 45,211
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $5,155,418 0.08% 44,900
Small Maven Securities LTD Broker-Dealer $4,879,850 0.07% 42,500
Large Rafferty Asset Management, LLC $4,528,615 0.07% 39,441
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension $4,005,610 0.06% 34,886
Small EQUITEC PROPRIETARY MARKETS, LLC $3,854,966 0.06% 33,574
Mid ADAR1 Capital Management, LLC $3,683,884 0.06% 32,084
Micro FIFTH LANE CAPITAL, LP $3,564,472 0.05% 31,044
Mega JANE STREET GROUP, LLC $3,536,456 0.05% 30,800
Small ABC ARBITRAGE SA $3,484,442 0.05% 30,347
Large DekaBank Deutsche Girozentrale Bank $3,444,600 0.05% 30,000
Large HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND Pension $3,444,600 0.05% 30,000
Mega GOLDMAN SACHS GROUP INC $3,214,960 0.05% 28,000
Mega VANGUARD ASSET MANAGEMENT, Ltd $3,159,961 0.05% 27,521
Large Squarepoint Ops LLC $3,116,788 0.05% 27,145
Mid New York Life Investment Management LLC $3,013,221 0.05% 26,243
Mega GOLDMAN SACHS GROUP INC $2,870,500 0.04% 25,000

Report a Problem

Category
Description
Email (optional, for follow-up)