ArcellxACLX
13F holders, Q1 2026 (March 31)240holders +22
87new positions
71sold out
6famous investors
$114.30avg. 13F price*
At the end of Q1 2026, 240 institutions reported holding Arcellx Inc. (ACLX) in their 13F filings, up 22 from Q4 2025. 87 opened new positions and 71 sold out. The largest holders were Gilead Sciences, Inc. ($771.7M), Paradigm Biocapital Advisors LP ($663.0M) and BlackRock, Inc. ($453.0M). 6 famous investors held it, including George Soros (0.4% of Soros Fund Management's portfolio), Paul Tudor Jones (0.3% of Tudor Investment Corporation's portfolio) and Israel Englander (0.0% of Millennium Management's portfolio).
- Company
- Arcellx Inc.
- CUSIP
- 03940C100
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 87 | $1.8B |
| Exits | 71 | $700.3M |
All 13F filers, Q4 2025 → Q1 2026: 19,036,855 shares bought and 30,226,462 shares sold, net −11,189,607 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 240 holders
| Gilead Sciences, Inc. | 36.44% | No change | 6,720,803 | $771.7M |
| Paradigm Biocapital Advisors LP | 13.55% | Add +0.9% | 5,774,016 | $663.0M |
| BlackRock, Inc. | 0.01% | Add +11.2% | 3,945,238 | $453.0M |
| NEA Management Company, LLC | 19.88% | No change | 3,045,262 | $349.7M |
| Pentwater Capital Management LP | 2.34% | New | 2,870,000 | $329.5M |
| Vanguard Capital Management LLC | 0.01% | — | 2,425,218 | $278.5M |
| Vanguard Portfolio Management LLC | 0.01% | — | 2,424,818 | $278.4M |
| SR One Capital Management, LP | 29.43% | No change | 2,346,630 | $269.4M |
| FIL Ltd | 0.21% | New | 2,339,192 | $268.6M |
| HBK Investments L P | 3.57% | New | 2,278,517 | $261.6M |
| T. Rowe Price Investment Management, Inc. | 0.18% | Reduce -78.6% | 2,255,878 | $259.0M |
| State Street Corp. | 0.01% | Reduce -16.1% | 1,675,895 | $192.4M |
| Glazer Capital, LLC | 3.85% | New | 1,507,128 | $173.0M |
| Goldman Sachs Group Inc. | 0.02% | Add +96.3% | 1,312,155 | $150.7M |
| Geode Capital Management, LLC | 0.01% | Add +7.4% | 1,028,666 | $118.1M |
| Morgan Stanley | 0.01% | Add +78.6% | 925,813 | $106.3M |
| JPMorgan Chase & Co. | 0.00% | Reduce -59.2% | 593,573 | $68.1M |
| Davidson Kempner Capital Management LP | 1.76% | New | 559,644 | $64.3M |
| TIG Advisors, LLC | 2.97% | New | 541,378 | $62.2M |
| Millennium Management | 0.05% | Add +5600.6% | 502,846 | $57.7M |
| Balyasny Asset Management L.P. | 0.11% | New | 479,763 | $55.1M |
| Tudor Investment Corporation | 0.29% | Add +905.0% | 462,588 | $53.1M |
| Bank of America Corp. | 0.00% | Add +5.7% | 452,333 | $51.9M |
| O'Connor Alternative Investments LLC | 2.93% | — | 450,504 | $51.7M |
| Magnetar Financial LLC | 0.49% | New | 394,931 | $45.3M |
| Alpine Associates Management Inc. | 2.56% | New | 378,000 | $43.4M |
| Nexpoint Asset Management, L.P. | 3.00% | New | 373,150 | $42.8M |
| Affinity Asset Advisors, LLC | 2.49% | Reduce -30.7% | 362,764 | $41.7M |
| Northern Trust Corp. | 0.01% | Add +8.8% | 350,065 | $40.2M |
| Charles Schwab Investment Management Inc. | 0.01% | Add +1.9% | 346,092 | $39.7M |
| Alliancebernstein L.P. | 0.01% | Add +1234.2% | 544,227 | $35.5M |
| Vanguard Fiduciary Trust Co. | 0.01% | — | 308,546 | $35.4M |
| Qube Research & Technologies Ltd | 0.05% | Add +210.3% | 303,847 | $34.9M |
| First Trust Capital Management L.P. | 1.44% | New | 238,235 | $27.4M |
| AQR Arbitrage LLC | 0.52% | New | 231,730 | $26.6M |
| AJU IB Investment Co., Ltd. | 84.07% | No change | 223,486 | $25.7M |
| LMR Partners LLP | 0.29% | New | 212,495 | $24.4M |
| Barclays PLC | 0.01% | Add +5.5% | 207,642 | $23.8M |
| Soros Fund Management | 0.42% | New | 200,000 | $23.0M |
| Gabelli Funds LLC | 0.15% | New | 195,900 | $22.5M |
| UBS Group AG | 0.00% | Reduce -38.5% | 194,709 | $22.4M |
| Verition Fund Management LLC | 0.22% | New | 187,354 | $21.5M |
| Water Island Capital LLC | 2.96% | New | 183,409 | $21.1M |
| Man Group plc | 0.04% | Add +5318.4% | 180,000 | $20.7M |
| Rock Springs Capital Management LP | 1.15% | No change | 169,859 | $19.5M |
| GABELLI & Co INVESTMENT ADVISERS, INC. | 2.60% | New | 152,400 | $17.5M |
| BNP Paribas Financial Markets | 0.01% | Add +4104.1% | 151,558 | $17.4M |
| Groupe la Francaise | 0.24% | New | 151,046 | $17.3M |
| Bank of New York Mellon Corp | 0.00% | Add +16.2% | 143,099 | $16.4M |
| Credit Industriel Et Commercial | 2.72% | New | 134,648 | $15.5M |
| Woodline Partners LP | 0.05% | Reduce -83.2% | 123,750 | $14.2M |
| Gardner Lewis Asset Management L P | 3.06% | New | 123,197 | $14.1M |
| Hudson Bay Capital Management LP | 0.09% | Reduce -69.3% | 122,900 | $14.1M |
| Picton Mahoney Asset Management | 0.14% | New | 120,000 | $13.8M |
| FMR LLC | 0.00% | Reduce -96.7% | 119,378 | $13.7M |
| Slotnik Capital, LLC | 4.03% | New | 118,000 | $13.5M |
| Oddo BHF Asset Management Sas | 0.52% | New | 115,000 | $13.2M |
| Prelude Capital Management, LLC | 0.87% | New | 98,849 | $11.3M |
| Renaissance Technologies | 0.02% | New | 96,400 | $11.1M |
| Janus Henderson Group PLC | 0.01% | Reduce -90.2% | 90,280 | $10.4M |
| CIBRA Capital Ltd | 4.91% | New | 88,623 | $10.2M |
| Nuveen, LLC | 0.00% | Add +4.1% | 85,294 | $9.8M |
| Deutsche Bank AG | 0.00% | Reduce -65.5% | 80,664 | $9.3M |
| Cinctive Capital Management LP | 0.60% | New | 80,000 | $9.2M |
| Chicago Capital Management, LLC | 16.99% | New | 92,951 | $8.0M |
| Sagefield Capital LP | 0.54% | New | 65,097 | $7.5M |
| Athos Capital Ltd | 2.30% | New | 64,900 | $7.5M |
| Russell Investments Group, Ltd. | 0.01% | Reduce -52.6% | 61,905 | $7.1M |
| Samsara Biocapital, LLC | 0.68% | No change | 60,873 | $7.0M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Reduce -64.4% | 57,289 | $6.6M |
| Voleon Capital Management LP | 0.14% | New | 56,720 | $6.5M |
| PSquared Asset Management AG | 2.21% | New | 55,251 | $6.3M |
| Swiss National Bank | 0.00% | No change | 54,700 | $6.3M |
| Twin Securities, Inc. | 3.06% | New | 53,982 | $6.2M |
| Susquehanna Portfolio Strategies, LLC | 0.09% | No change | 50,938 | $5.8M |
| Harvest Management LLC | 3.05% | New | 50,000 | $5.7M |
| Congress Asset Management Co. | 0.04% | Add +82.9% | 47,551 | $5.5M |
| Invesco Ltd. | 0.00% | Add +17.1% | 47,280 | $5.4M |
| T. Rowe Price Associates Inc. | 0.00% | Reduce -97.2% | 45,954 | $5.3M |
| Rhumbline Advisers | 0.00% | Add +1.9% | 45,211 | $5.2M |
| Maven Securities LTD | 0.29% | New | 42,500 | $4.9M |
| Rafferty Asset Management, LLC | 0.02% | Reduce -43.3% | 39,441 | $4.5M |
| California State Teachers Retirement System | 0.00% | Add +28.7% | 34,886 | $4.0M |
| Equitec Proprietary Markets, LLC | 8.92% | New | 33,574 | $3.9M |
| ADAR1 Capital Management, LLC | 0.22% | Add +1.9% | 32,084 | $3.7M |
| Fifth Lane Capital, LP | 4.36% | New | 31,044 | $3.6M |
| DekaBank Deutsche Girozentrale | 0.01% | No change | 30,000 | $3.5M |
| Abc Arbitrage SA | 0.46% | New | 30,347 | $3.5M |
| Healthcare of Ontario Pension Plan Trust Fund | 0.01% | New | 30,000 | $3.4M |
| VANGUARD ASSET MANAGEMENT, Ltd | 0.00% | — | 27,521 | $3.2M |
| Squarepoint Ops LLC | 0.01% | Reduce -45.6% | 27,145 | $3.1M |
| New York Life Investment Management LLC | 0.03% | New | 26,243 | $3.0M |
| SG Americas Securities, LLC | 0.00% | Add +105.2% | 24,713 | $2.8M |
| Yakira Capital Management, Inc. | 0.81% | New | 24,000 | $2.8M |
| Skandinaviska Enskilda Banken AB (publ) | 0.06% | New | 24,000 | $2.8M |
| Legal & General Group Plc | 0.00% | Reduce -26.0% | 21,888 | $2.5M |
| Citadel Advisors | 0.00% | Reduce -98.5% | 21,806 | $2.5M |
| Erste Asset Management GmbH | 0.02% | No change | 21,000 | $2.4M |
| MetLife Investment Management, LLC | 0.01% | Add +8.1% | 20,914 | $2.4M |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +4.0% | 20,806 | $2.4M |
"% of holder's portfolio" is ACLX's weight in each manager's 13F, not the share of Arcellx Inc. the manager owns.