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, Q1 2026
Institutional positions in Arcellx, Inc. as of Mar 31, 2026. 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
ACLX is no longer listed, so this page shows Q1 2026. 13F filings for later quarters list far fewer holders.
- Institutional holders
- 240
- +26 vs. Q4 2025
- Shares held
- 57.0M
- −5.51M (−8.8%) vs. Q4 2025
- Total value
- $6.52B
- +$2.44B (+59.9%) vs. Q4 2025
- New holders
- 97
- 62 more added
- Sold out
- 71
- 56 more reduced
4 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 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, Q1 2026
Shares, value and share of portfolio for each institution holding Arcellx, Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Gabelli Funds LLC | 195,900 | $22.5M | 0.15% | +195,900 | New |
| Soros Fund Management LLCSuperinvestorSoros Fund Management | 200,000 | $23.0M | 0.31% | +200,000 | New |
| Barclays PLC | 207,642 | $23.8M | 0.01% | +10,870+5.5% | Added |
| LMR Partners LLP | 212,495 | $24.4M | 0.22% | +212,495 | New |
| AJU IB Investment Co., Ltd. | 223,486 | $25.7M | 84.07% | 00.0% | Unchanged |
| CNH Partners LLC | 231,730 | $26.6M | 0.44% | +231,730 | New |
| Vivaldi Asset Management, LLC | 238,235 | $27.4M | 1.44% | +238,235 | New |
| Qube Research & Technologies Ltd | 303,847 | $34.9M | 0.05% | +205,941+210.3% | Added |
| Vanguard Fiduciary Trust Co | 308,546 | $35.4M | 0.01% | +308,546 | New |
| Alliancebernstein L.P. | 544,227 | $35.5M | 0.01% | +503,436+1,234.2% | Added |
| Charles Schwab Investment Management Inc | 346,092 | $39.7M | 0.01% | +6,279+1.8% | Added |
| Northern Trust Corp | 350,065 | $40.2M | 0.01% | +28,272+8.8% | Added |
| Affinity Asset Advisors, LLC | 362,764 | $41.7M | 2.44% | −160,961−30.7% | Reduced |
| Highland Capital Management Fund Advisors, L.P. | 373,150 | $42.8M | 2.99% | +373,150 | New |
| Alpine Associates Management Inc. | 378,000 | $43.4M | 2.56% | +378,000 | New |
| Magnetar Financial LLC | 394,931 | $45.3M | 0.46% | +394,931 | New |
| O'Connor Alternative Investments LLC | 450,504 | $51.7M | 2.71% | +450,504 | New |
| Bank of America Corp | 452,333 | $51.9M | 0.00% | +24,564+5.7% | Added |
| Tudor Investment Corp Et Al | 462,588 | $53.1M | 0.29% | +416,559+905.0% | Added |
| Balyasny Asset Management LLC | 479,763 | $55.1M | 0.11% | +479,763 | New |
| Millennium Management LLC | 502,846 | $57.7M | 0.04% | +494,025+5,600.6% | Added |
| TIG Advisors, LLC | 541,378 | $62.2M | 2.97% | +541,378 | New |
| Davidson Kempner Capital Management LP | 559,644 | $64.3M | 1.14% | +559,644 | New |
| JPMorgan Chase & Co | 593,573 | $68.1M | 0.00% | −860,904−59.2% | Reduced |
| Morgan Stanley | 925,813 | $106.3M | 0.01% | +407,409+78.6% | Added |
| Geode Capital Management, LLC | 1,028,666 | $118.1M | 0.01% | +70,609+7.4% | Added |
| Goldman Sachs Group Inc | 1,312,155 | $150.7M | 0.02% | +643,675+96.3% | Added |
| Glazer Capital, LLC | 1,507,128 | $173.0M | 3.68% | +1,507,128 | New |
| State Street Corp | 1,675,895 | $192.4M | 0.01% | −322,608−16.1% | Reduced |
| T. Rowe Price Investment Management, Inc. | 2,255,878 | $259.0M | 0.18% | −8,304,547−78.6% | Reduced |
| HBK Investments L P | 2,278,517 | $261.6M | 3.29% | +2,278,517 | New |
| FIL Ltd | 2,339,192 | $268.6M | 0.21% | +2,339,192 | New |
| Sr One Capital Management, LP | 2,346,630 | $269.4M | 29.43% | 00.0% | Unchanged |
| Vanguard Portfolio Management LLC | 2,424,818 | $278.4M | 0.01% | +2,424,818 | New |
| Vanguard Capital Management LLC | 2,425,218 | $278.5M | 0.01% | +2,425,218 | New |
| Pentwater Capital Management LP | 2,870,000 | $329.5M | 2.34% | +2,870,000 | New |
| NEA Management Company, LLC | 3,045,262 | $349.7M | 19.88% | 00.0% | Unchanged |
| BlackRock, Inc. | 3,945,238 | $453.0M | 0.01% | +396,451+11.2% | Added |
| Paradigm Biocapital Advisors LP | 5,774,016 | $663.0M | 13.55% | +50,000+0.9% | Added |
| Gilead Sciences, Inc. | 6,720,803 | $771.7M | 36.44% | 00.0% | Unchanged |
| Vestal Point Capital, LP | 0 | $0 | 0.00% | −2,925,000−100.0% | Sold out |
| Perceptive Advisors LLC | 0 | $0 | 0.00% | −1,466,071−100.0% | Sold out |
| Ra Capital Management, L.P. | 0 | $0 | 0.00% | −1,267,156−100.0% | Sold out |
| Bamco Inc | 0 | $0 | 0.00% | −609,697−100.0% | Sold out |
| Lord, Abbett & Co. LLC | 0 | $0 | 0.00% | −449,634−100.0% | Sold out |
| American Century Companies Inc | 0 | $0 | 0.00% | −419,080−100.0% | Sold out |
| Hood River Capital Management LLC | 0 | $0 | 0.00% | −335,500−100.0% | Sold out |
| StemPoint Capital LP | 0 | $0 | 0.00% | −332,860−100.0% | Sold out |
| Fisher Asset Management, LLC | 0 | $0 | 0.00% | −322,855−100.0% | Sold out |
| TD Asset Management Inc | 0 | $0 | 0.00% | −300,856−100.0% | Sold out |
| Wellington Management Group LLP | 0 | $0 | 0.00% | −214,776−100.0% | Sold out |
| Integral Health Asset Management, LLC | 0 | $0 | 0.00% | −200,000−100.0% | Sold out |
| Catalio Capital Management, LP | 0 | $0 | 0.00% | −156,109−100.0% | Sold out |
| Rhenman & Partners Asset Management AB | 0 | $0 | 0.00% | −133,500−100.0% | Sold out |
| Clough Capital Partners L P | 0 | $0 | 0.00% | −129,780−100.0% | Sold out |
| Parkman Healthcare Partners LLC | 0 | $0 | 0.00% | −128,111−100.0% | Sold out |
| Raymond James Financial Inc | 0 | $0 | 0.00% | −122,346−100.0% | Sold out |
| Logos Global Management LP | 0 | $0 | 0.00% | −115,000−100.0% | Sold out |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −99,131−100.0% | Sold out |
| Candriam Luxembourg S.C.A. | 0 | $0 | 0.00% | −96,420−100.0% | Sold out |
| HighVista Strategies LLC | 0 | $0 | 0.00% | −75,002−100.0% | Sold out |
| XTX Topco Ltd | 0 | $0 | 0.00% | −72,583−100.0% | Sold out |
| Standard Life Aberdeen plc | 0 | $0 | 0.00% | −60,364−100.0% | Sold out |
| Brevan Howard Capital Management LP | 0 | $0 | 0.00% | −60,178−100.0% | Sold out |
| Pier Capital, LLC | 0 | $0 | 0.00% | −59,063−100.0% | Sold out |
| Jane Street Group, LLC | 0 | $0 | 0.00% | −54,670−100.0% | Sold out |
| Edmond de Rothschild Holding S.A. | 0 | $0 | 0.00% | −45,480−100.0% | Sold out |
| HealthInvest Partners AB | 0 | $0 | 0.00% | −41,717−100.0% | Sold out |
| Schroder Investment Management Group | 0 | $0 | 0.00% | −42,478−100.0% | Sold out |
| NEOS Investment Management LLC | 0 | $0 | 0.00% | −39,904−100.0% | Sold out |
| Tema ETFs LLC | 0 | $0 | 0.00% | −39,314−100.0% | Sold out |
| J. Goldman & Co LP | 0 | $0 | 0.00% | −31,219−100.0% | Sold out |
| Soleus Capital Management, L.P. | 0 | $0 | 0.00% | −30,000−100.0% | Sold out |
| D. E. Shaw & Co., Inc. | 0 | $0 | 0.00% | −25,165−100.0% | Sold out |
| Y-Intercept (Hong Kong) Ltd | 0 | $0 | 0.00% | −24,538−100.0% | Sold out |
| Harbor Capital Advisors, Inc. | 0 | $0 | 0.00% | −24,121−100.0% | Sold out |
| First Trust Advisors LP | 0 | $0 | 0.00% | −20,896−100.0% | Sold out |
| Intech Investment Management LLC | 0 | $0 | 0.00% | −15,031−100.0% | Sold out |
| Trexquant Investment LP | 0 | $0 | 0.00% | −14,915−100.0% | Sold out |
| HighTower Advisors, LLC | 0 | $0 | 0.00% | −12,558−100.0% | Sold out |
| Shay Capital LLC | 0 | $0 | 0.00% | −11,400−100.0% | Sold out |
| Martingale Asset Management L P | 0 | $0 | 0.00% | −10,618−100.0% | Sold out |
| Franklin Resources Inc | 0 | $0 | 0.00% | −10,131−100.0% | Sold out |
| Gotham Asset Management, LLC | 0 | $0 | 0.00% | −9,842−100.0% | Sold out |
| LPL Financial LLC | 0 | $0 | 0.00% | −9,622−100.0% | Sold out |
| Dimensional Fund Advisors LP | 0 | $0 | 0.00% | −8,903−100.0% | Sold out |
| Marshall Wace, LLP | 0 | $0 | 0.00% | −8,442−100.0% | Sold out |
| PSP Research LLC | 0 | $0 | 0.00% | −8,224−100.0% | Sold out |
| AQR Capital Management LLC | 0 | $0 | 0.00% | −7,960−100.0% | Sold out |
| Headlands Technologies LLC | 0 | $0 | 0.00% | −7,320−100.0% | Sold out |
| Twinbeech Capital LP | 0 | $0 | 0.00% | −6,949−100.0% | Sold out |
| Allianz Asset Management GmbH | 0 | $0 | 0.00% | −6,200−100.0% | Sold out |
| Banque Pictet & Cie SA | 0 | $0 | 0.00% | −5,109−100.0% | Sold out |
| Farallon Capital Management, L.L.C. | 0 | $0 | 0.00% | −4,000−100.0% | Sold out |
| Virginia Retirement Systems Et Al | 0 | $0 | 0.00% | −4,000−100.0% | Sold out |
| Quest Partners LLC | 0 | $0 | 0.00% | −3,796−100.0% | Sold out |
| Simplex Trading, LLC | 0 | $0 | 0.00% | −3,414−100.0% | Sold out |
| Public Employees Retirement Association of Colorado | 0 | $0 | 0.00% | −3,217−100.0% | Sold out |
| Avanza Fonder AB | 0 | $0 | 0.00% | −2,003−100.0% | Sold out |
| Caption Management, LLC | 0 | $0 | 0.00% | −1,825−100.0% | Sold out |