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.
13F holders, Q4 2025
Institutional positions in Arcellx, Inc. as of Dec 31, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 218
- +11 vs. Q3 2025
- Shares held
- 66.6M
- +3.56M (+5.6%) vs. Q3 2025
- Total value
- $4.34B
- −$833.5M (−16.1%) vs. Q3 2025
- New holders
- 42
- 72 more added
- Sold out
- 31
- 70 more reduced
2 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting ACLX on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 2 | $3.43M |
| Q1 2026 | 240 | $6.52B |
| Q4 2025 | 218 | $4.34B |
| Q3 2025 | 209 | $5.18B |
| Q2 2025 | 203 | $4.01B |
| Q1 2025 | 198 | $4.04B |
| Q4 2024 | 211 | $4.54B |
| Q3 2024 | 186 | $4.13B |
| Q2 2024 | 167 | $2.77B |
| Q1 2024 | 183 | $3.27B |
| Q4 2023 | 156 | $2.59B |
| Q3 2023 | 136 | $1.71B |
| Q2 2023 | 138 | $1.52B |
| Q1 2023 | 117 | $1.40B |
| Q4 2022 | 125 | $1.30B |
| Q3 2022 | 74 | $781.8M |
| Q2 2022 | 68 | $621.5M |
| Q1 2022 | 49 | $357.9M |
| Q4 2021 | 0 | $0 |
| Q3 2021 | 0 | $0 |
| Q2 2021 | 0 | $0 |
| Q1 2021 | 0 | $0 |
Institutions, Q4 2025
Shares, value and share of portfolio for each institution holding Arcellx, Inc.; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Woodline Partners LP | 737,824 | $48.1M | 0.19% | +496,435+205.7% | Added |
| Janus Henderson Group PLC | 919,578 | $60.0M | 0.03% | −94,343−9.3% | Reduced |
| Geode Capital Management, LLC | 958,057 | $62.5M | 0.00% | +31,753+3.4% | Added |
| Ra Capital Management, L.P. | 1,267,156 | $82.6M | 0.85% | −1,769,371−58.3% | Reduced |
| JPMorgan Chase & Co | 1,454,477 | $94.8M | 0.01% | +571,974+64.8% | Added |
| Perceptive Advisors LLC | 1,466,071 | $95.6M | 1.75% | −1,002,282−40.6% | Reduced |
| Citadel Advisors LLC | 1,500,223 | $97.8M | 0.07% | +478,770+46.9% | Added |
| Price T Rowe Associates Inc | 1,610,801 | $105.0M | 0.01% | +346,750+27.4% | Added |
| State Street Corp | 1,998,503 | $130.3M | 0.00% | +472,476+31.0% | Added |
| Sr One Capital Management, LP | 2,346,630 | $153.0M | 21.66% | 00.0% | Unchanged |
| Vestal Point Capital, LP | 2,925,000 | $190.7M | 7.00% | +1,675,000+134.0% | Added |
| NEA Management Company, LLC | 3,045,262 | $198.6M | 10.12% | 00.0% | Unchanged |
| BlackRock, Inc. | 3,548,787 | $231.4M | 0.00% | +160,891+4.7% | Added |
| FMR LLC | 3,563,728 | $232.4M | 0.01% | −2,197,589−38.1% | Reduced |
| Vanguard Group Inc | 4,081,519 | $266.1M | 0.00% | +174,432+4.5% | Added |
| Paradigm Biocapital Advisors LP | 5,724,016 | $373.2M | 9.99% | +1,075,000+23.1% | Added |
| Gilead Sciences, Inc. | 6,720,803 | $438.2M | 22.64% | 00.0% | Unchanged |
| T. Rowe Price Investment Management, Inc. | 10,560,425 | $688.5M | 0.43% | +4,208,069+66.2% | Added |
| Capital World Investors | 0 | $0 | 0.00% | −783,011−100.0% | Sold out |
| Cormorant Asset Management, LP | 0 | $0 | 0.00% | −775,000−100.0% | Sold out |
| First Turn Management, LLC | 0 | $0 | 0.00% | −313,733−100.0% | Sold out |
| Baker Bros. Advisors LP | 0 | $0 | 0.00% | −166,825−100.0% | Sold out |
| Monaco Asset Management SAM | 0 | $0 | 0.00% | −78,589−100.0% | Sold out |
| Nicholas Investment Partners, LP | 0 | $0 | 0.00% | −58,894−100.0% | Sold out |
| Pathway Capital Management, LP | 0 | $0 | 0.00% | −51,051−100.0% | Sold out |
| Jain Global LLC | 0 | $0 | 0.00% | −50,011−100.0% | Sold out |
| Balyasny Asset Management LLC | 0 | $0 | 0.00% | −48,691−100.0% | Sold out |
| Dark Forest Capital Management LP | 0 | $0 | 0.00% | −36,794−100.0% | Sold out |
| Sector Gamma AS | 0 | $0 | 0.00% | −32,009−100.0% | Sold out |
| Blue Owl Capital Holdings LP | 0 | $0 | 0.00% | −26,823−100.0% | Sold out |
| SummitTX Capital, L.P. | 0 | $0 | 0.00% | −25,448−100.0% | Sold out |
| Alps Advisors Inc | 0 | $0 | 0.00% | −25,188−100.0% | Sold out |
| Cinctive Capital Management LP | 0 | $0 | 0.00% | −13,626−100.0% | Sold out |
| Fred Alger Management, LLC | 0 | $0 | 0.00% | −11,895−100.0% | Sold out |
| Jefferies Financial Group Inc. | 0 | $0 | 0.00% | −10,500−100.0% | Sold out |
| Lighthouse Investment Partners, LLC | 0 | $0 | 0.00% | −10,500−100.0% | Sold out |
| Connor, Clark & Lunn Investment Management Ltd. | 0 | $0 | 0.00% | −9,910−100.0% | Sold out |
| Legato Capital Management LLC | 0 | $0 | 0.00% | −7,675−100.0% | Sold out |
| Aquatic Capital Management LLC | 0 | $0 | 0.00% | −5,232−100.0% | Sold out |
| Integrated Wealth Concepts LLC | 0 | $0 | 0.00% | −3,423−100.0% | Sold out |
| Quarry LP | 0 | $0 | 0.00% | −3,376−100.0% | Sold out |
| Xponance, Inc. | 0 | $0 | 0.00% | −2,694−100.0% | Sold out |
| Principal Financial Group Inc | 0 | $0 | 0.00% | −2,622−100.0% | Sold out |
| Wexford Capital LP | 0 | $0 | 0.00% | −686−100.0% | Sold out |
| MAI Capital Management | 0 | $0 | 0.00% | −318−100.0% | Sold out |
| J.Safra Asset Management Corp | 0 | $0 | 0.00% | −40−100.0% | Sold out |
| Marquette Asset Management, LLC | 0 | $0 | 0.00% | −22−100.0% | Sold out |
| Essential Partners LLC | 0 | $0 | 0.00% | −18−100.0% | Sold out |
| Rise Advisors, LLC | 0 | $0 | 0.00% | −7−100.0% | Sold out |
| CIBC Bancorp USA Inc. | – | – | – | – | Not filed |
| Abich Financial Wealth Management LLC | – | – | – | – | Not filed |