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, Q3 2025
Institutional positions in Arcellx, Inc. as of Sep 30, 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
- 209
- +9 vs. Q2 2025
- Shares held
- 63.1M
- +1.70M (+2.8%) vs. Q2 2025
- Total value
- $5.18B
- +$1.17B (+29.1%) vs. Q2 2025
- New holders
- 30
- 59 more added
- Sold out
- 21
- 81 more reduced
3 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 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, Q3 2025
Shares, value and share of portfolio for each institution holding Arcellx, Inc.; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Perceptive Advisors LLC | 2,468,353 | $202.7M | 5.86% | −9,647−0.4% | Reduced |
| Ra Capital Management, L.P. | 3,036,527 | $249.3M | 3.07% | 00.0% | Unchanged |
| NEA Management Company, LLC | 3,045,262 | $250.0M | 13.72% | −700,000−18.7% | Reduced |
| BlackRock, Inc. | 3,387,896 | $278.1M | 0.00% | −80,288−2.3% | Reduced |
| Vanguard Group Inc | 3,907,087 | $320.8M | 0.00% | −37,798−1.0% | Reduced |
| Paradigm Biocapital Advisors LP | 4,649,016 | $381.7M | 11.29% | 00.0% | Unchanged |
| FMR LLC | 5,761,317 | $473.0M | 0.02% | −210,834−3.5% | Reduced |
| T. Rowe Price Investment Management, Inc. | 6,352,356 | $521.5M | 0.32% | +4,408,630+226.8% | Added |
| Gilead Sciences, Inc. | 6,720,803 | $551.8M | 30.80% | 00.0% | Unchanged |
| Marshall Wace, LLP | 0 | $0 | 0.00% | −111,808−100.0% | Sold out |
| Great Point Partners LLC | 0 | $0 | 0.00% | −100,000−100.0% | Sold out |
| Decheng Capital LLC | 0 | $0 | 0.00% | −547,609−100.0% | Sold out |
| Voloridge Investment Management, LLC | 0 | $0 | 0.00% | −66,422−100.0% | Sold out |
| Trexquant Investment LP | 0 | $0 | 0.00% | −43,183−100.0% | Sold out |
| Tudor Investment Corp Et Al | 0 | $0 | 0.00% | −23,197−100.0% | Sold out |
| XTX Topco Ltd | 0 | $0 | 0.00% | −16,787−100.0% | Sold out |
| Squarepoint Ops LLC | 0 | $0 | 0.00% | −16,044−100.0% | Sold out |
| Qube Research & Technologies Ltd | 0 | $0 | 0.00% | −11,772−100.0% | Sold out |
| Quantessence Capital LLC | 0 | $0 | 0.00% | −4,750−100.0% | Sold out |
| EntryPoint Capital, LLC | 0 | $0 | 0.00% | −3,634−100.0% | Sold out |
| Bellevue Group AG | 0 | $0 | 0.00% | −3,000−100.0% | Sold out |
| Allostery Investments LP | 0 | $0 | 0.00% | −1,000−100.0% | Sold out |
| Lazard Asset Management LLC | 0 | $0 | 0.00% | −735−100.0% | Sold out |
| Turim 21 Investimentos Ltda. | 0 | $0 | 0.00% | −179−100.0% | Sold out |
| Natixis | 0 | $0 | 0.00% | −80−100.0% | Sold out |
| MPM Oncology Impact Management LP | 0 | $0 | 0.00% | −37−100.0% | Sold out |
| Clearstead Advisors, LLC | 0 | $0 | 0.00% | −33−100.0% | Sold out |
| Wolff Wiese Magana LLC | 0 | $0 | 0.00% | −17−100.0% | Sold out |
| Skopos Labs, Inc. | 0 | $0 | 0.00% | −15−100.0% | Sold out |
| Twin Peaks Wealth Advisors, LLC | 0 | $0 | 0.00% | −1−100.0% | Sold out |
| Norges Bank | – | – | – | – | Not filed |
| E Fund Management Co., Ltd. | – | – | – | – | Not filed |
| CIBC World Markets Corp | – | – | – | – | Not filed |