ArcellxACLX
13F holders, Q4 2025 (December 31)218holders +9
37new positions
31sold out
8famous investors
$65.20avg. 13F price*
At the end of Q4 2025, 218 institutions reported holding Arcellx Inc. (ACLX) in their 13F filings, up 9 from Q3 2025. 37 opened new positions and 31 sold out. The largest holders were T. Rowe Price Investment Management, Inc. ($688.5M), Gilead Sciences, Inc. ($438.2M) and Paradigm Biocapital Advisors LP ($373.2M). 8 famous investors held it, including Ron Baron (0.1% of Baron Capital (BAMCO)'s portfolio), Ken Griffin (0.1% of Citadel Advisors's portfolio) and Paul Tudor Jones (0.0% of Tudor Investment Corporation's portfolio).
- Company
- Arcellx Inc.
- CUSIP
- 03940C100
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q3 2025 → Q4 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 37 | $126.3M |
| Exits | 31 | $209.7M |
All 13F filers, Q3 2025 → Q4 2025: 13,512,267 shares bought and 9,980,333 shares sold, net +3,531,934 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 218 holders
| T. Rowe Price Investment Management, Inc. | 0.44% | Add +66.2% | 10,560,425 | $688.5M |
| Gilead Sciences, Inc. | 22.64% | No change | 6,720,803 | $438.2M |
| Paradigm Biocapital Advisors LP | 9.99% | Add +23.1% | 5,724,016 | $373.2M |
| Vanguard Group Inc. | 0.00% | Add +4.5% | 4,081,519 | $266.1M |
| FMR LLC | 0.01% | Reduce -38.1% | 3,563,728 | $232.4M |
| BlackRock, Inc. | 0.00% | Add +4.8% | 3,548,787 | $231.4M |
| NEA Management Company, LLC | 10.12% | No change | 3,045,262 | $198.6M |
| Vestal Point Capital, LP | 7.00% | Add +134.0% | 2,925,000 | $190.7M |
| SR One Capital Management, LP | 21.66% | No change | 2,346,630 | $153.0M |
| State Street Corp. | 0.00% | Add +31.0% | 1,998,503 | $130.3M |
| T. Rowe Price Associates Inc. | 0.01% | Add +27.4% | 1,610,801 | $105.0M |
| Citadel Advisors | 0.07% | Add +46.9% | 1,500,223 | $97.8M |
| Perceptive Advisors LLC | 1.76% | Reduce -40.6% | 1,466,071 | $95.6M |
| JPMorgan Chase & Co. | 0.01% | Add +64.8% | 1,454,477 | $94.8M |
| Ra Capital Management, L.P. | 0.85% | Reduce -58.3% | 1,267,156 | $82.6M |
| Geode Capital Management, LLC | 0.00% | Add +3.4% | 958,057 | $62.5M |
| Janus Henderson Group PLC | 0.03% | Reduce -9.3% | 919,578 | $60.0M |
| Woodline Partners LP | 0.19% | Add +205.7% | 737,824 | $48.1M |
| Goldman Sachs Group Inc. | 0.01% | Add +49.1% | 668,480 | $43.6M |
| Baron Capital (BAMCO) | 0.11% | Add +10.8% | 609,697 | $39.8M |
| Affinity Asset Advisors, LLC | 2.53% | Add +4.7% | 523,725 | $34.1M |
| Morgan Stanley | 0.00% | Add +19.8% | 518,404 | $33.8M |
| Lord, Abbett & Co. LLC | 0.09% | Add +6.0% | 449,634 | $29.3M |
| Bank of America Corp. | 0.00% | Add +149.8% | 427,769 | $27.9M |
| American Century Companies Inc. | 0.01% | Add +1.7% | 419,080 | $27.3M |
| Hudson Bay Capital Management LP | 0.16% | New | 400,942 | $26.1M |
| Pictet Asset Management Holding SA | 0.02% | Reduce -18.6% | 342,612 | $22.3M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +2.8% | 339,813 | $22.2M |
| Hood River Capital Management LLC | 0.24% | New | 335,500 | $21.9M |
| Stempoint Capital LP | 3.72% | Add +2826.0% | 332,860 | $21.7M |
| Fisher Asset Management | 0.01% | New | 322,855 | $21.1M |
| Northern Trust Corp. | 0.00% | Reduce -3.8% | 321,793 | $21.0M |
| UBS Group AG | 0.00% | Add +67.2% | 316,612 | $20.6M |
| TD Asset Management Inc | 0.02% | Add +29.3% | 300,856 | $19.6M |
| Deutsche Bank AG | 0.01% | Reduce -41.5% | 233,592 | $15.2M |
| AJU IB Investment Co., Ltd. | 63.94% | Reduce -78.7% | 223,486 | $14.6M |
| ExodusPoint Capital Management, LP | 0.16% | Add +2201.8% | 217,424 | $14.2M |
| Wellington Management Group LLP | 0.00% | Reduce -7.5% | 214,776 | $14.0M |
| Integral Health Asset Management, LLC | 0.66% | Add +33.3% | 200,000 | $13.0M |
| Barclays PLC | 0.01% | Add +82.8% | 196,772 | $12.8M |
| Rock Springs Capital Management LP | 0.57% | Reduce -5.1% | 169,859 | $11.1M |
| Voya Investment Management LLC | 0.01% | Reduce -31.8% | 168,680 | $11.0M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Reduce -4.5% | 161,035 | $10.5M |
| Citigroup Inc. | 0.01% | Add +68.6% | 156,519 | $10.2M |
| Catalio Capital Management, LP | 1.80% | New | 156,109 | $10.2M |
| Rhenman & Partners Asset Management AB | 0.81% | Add +104.6% | 133,500 | $8.7M |
| Russell Investments Group, Ltd. | 0.01% | Reduce -9.1% | 130,520 | $8.5M |
| Clough Capital Partners L P | 0.76% | New | 129,780 | $8.5M |
| Parkman Healthcare Partners LLC | 0.80% | Reduce -14.5% | 128,111 | $8.4M |
| Bank of New York Mellon Corp | 0.00% | Reduce -6.3% | 123,171 | $8.0M |
| Raymond James Financial Inc. | 0.00% | Reduce -3.3% | 122,346 | $7.8M |
| Logos Global Management LP | 0.50% | Reduce -30.3% | 115,000 | $7.5M |
| Schonfeld Strategic Advisors LLC | 0.03% | Reduce -80.2% | 99,131 | $6.5M |
| Qube Research & Technologies Ltd | 0.01% | New | 97,906 | $6.4M |
| Candriam S.C.A. | 0.03% | New | 96,420 | $6.3M |
| Nuveen, LLC | 0.00% | Reduce -1.8% | 81,944 | $5.3M |
| HighVista Strategies LLC | 1.26% | Reduce -22.0% | 75,002 | $4.9M |
| XTX Topco Ltd | 0.12% | New | 72,583 | $4.7M |
| Rafferty Asset Management, LLC | 0.02% | Add +41.2% | 69,515 | $4.5M |
| Ameriprise Financial Inc. | 0.00% | Reduce -58.3% | 69,156 | $4.5M |
| Samsara Biocapital, LLC | 0.41% | Reduce -25.0% | 60,873 | $4.0M |
| Aberdeen Group plc | 0.01% | New | 60,364 | $3.9M |
| Brevan Howard Capital Management LP | 0.08% | Add +1481.5% | 60,178 | $3.9M |
| Pier Capital, LLC | 0.61% | Reduce -1.9% | 59,063 | $3.9M |
| Manufacturers Life Insurance Company, The | 0.00% | Add +6.3% | 57,251 | $3.7M |
| Victory Capital Management Inc. | 0.00% | Reduce -68.1% | 54,872 | $3.6M |
| Swiss National Bank | 0.00% | Add +2.4% | 54,700 | $3.6M |
| Jane Street Group, LLC | 0.00% | Reduce -26.6% | 54,670 | $3.6M |
| Wells Fargo & Company | 0.00% | Add +57.6% | 54,260 | $3.5M |
| Susquehanna Portfolio Strategies, LLC | 0.05% | No change | 50,938 | $3.3M |
| Squarepoint Ops LLC | 0.01% | New | 49,875 | $3.3M |
| Tudor Investment Corporation | 0.02% | New | 46,029 | $3.0M |
| Edmond DE Rothschild Holding S.A. | 0.04% | No change | 45,480 | $3.0M |
| Rhumbline Advisers | 0.00% | Reduce -15.4% | 44,352 | $2.9M |
| Atle Fund Management AB | 0.87% | Add +62.1% | 41,717 | $2.7M |
| Schroder Investment Management Group | 0.00% | No change | 42,478 | $2.7M |
| Alliancebernstein L.P. | 0.00% | Reduce -11.9% | 40,791 | $2.7M |
| Invesco Ltd. | 0.00% | Add +19.9% | 40,372 | $2.6M |
| NEOS Investment Management LLC | 0.02% | Add +8.4% | 39,904 | $2.6M |
| Tema ETFs LLC | 0.20% | Add +6.8% | 39,314 | $2.6M |
| DekaBank Deutsche Girozentrale | 0.00% | No change | 30,000 | $2.3M |
| ADAR1 Capital Management, LLC | 0.15% | No change | 31,484 | $2.1M |
| J. Goldman & Co LP | 0.08% | New | 31,219 | $2.0M |
| Soleus Capital Management, L.P. | 0.08% | Reduce -70.0% | 30,000 | $2.0M |
| Legal & General Group Plc | 0.00% | Add +2.0% | 29,565 | $1.9M |
| California State Teachers Retirement System | 0.00% | Reduce -9.9% | 27,115 | $1.8M |
| Congress Asset Management Co. | 0.01% | Add +2.8% | 25,999 | $1.7M |
| Profund Advisors LLC | 0.05% | Add +138.7% | 25,740 | $1.7M |
| Knott David M Jr | 0.78% | No change | 25,700 | $1.7M |
| D. E. Shaw & Co. | 0.00% | New | 25,165 | $1.6M |
| Y-Intercept (Hong Kong) Ltd | 0.04% | Add +58.2% | 24,538 | $1.6M |
| Harbor Capital Advisors, Inc. | 0.12% | Add +11.3% | 24,121 | $1.6M |
| Erste Asset Management GmbH | 0.01% | No change | 21,000 | $1.4M |
| State of Wisconsin Investment Board | 0.00% | Reduce -5.9% | 20,918 | $1.4M |
| First Trust Advisors LP | 0.00% | New | 20,896 | $1.4M |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +8.7% | 20,002 | $1.3M |
| MetLife Investment Management, LLC | 0.01% | Reduce -3.4% | 19,344 | $1.3M |
| STRS Ohio | 0.00% | Reduce -21.8% | 16,869 | $1.1M |
| Prudential Financial Inc. | 0.00% | Add +71.1% | 16,720 | $1.1M |
| Norges Bank | 0.00% | — | 16,707 | $1.1M |
"% of holder's portfolio" is ACLX's weight in each manager's 13F, not the share of Arcellx Inc. the manager owns.