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 |
|---|---|---|---|---|---|
| StemPoint Capital LP | 11,376 | $934.0K | 0.19% | −190,076−94.4% | Reduced |
| Handelsbanken Fonder AB | 11,600 | $952.0K | 0.00% | 00.0% | Unchanged |
| Fred Alger Management, LLC | 11,895 | $976.6K | 0.00% | +11,895 | New |
| Intech Investment Management LLC | 12,255 | $1.01M | 0.01% | −4,225−25.6% | Reduced |
| HighTower Advisors, LLC | 12,560 | $1.03M | 0.00% | +18+0.1% | Added |
| Caption Management, LLC | 12,600 | $1.03M | 0.06% | −14,156−52.9% | Reduced |
| Franklin Resources Inc | 13,325 | $1.09M | 0.00% | −695−5.0% | Reduced |
| Cinctive Capital Management LP | 13,626 | $1.12M | 0.06% | −3,913−22.3% | Reduced |
| Jasper Ridge Partners, L.P. | 15,107 | $1.24M | 0.03% | +3,287+27.8% | Added |
| Y-Intercept (Hong Kong) Ltd | 15,508 | $1.27M | 0.03% | +15,508 | New |
| Mirae Asset Global ETFs Holdings Ltd. | 18,402 | $1.50M | 0.00% | −4,416−19.4% | Reduced |
| MetLife Investment Management | 20,023 | $1.64M | 0.01% | −1,926−8.8% | Reduced |
| Erste Asset Management GmbH | 21,000 | $1.66M | 0.02% | 00.0% | Unchanged |
| New York State Common Retirement Fund | 20,345 | $1.67M | 0.00% | +2,530+14.2% | Added |
| STRS Ohio | 21,569 | $1.77M | 0.01% | +7,269+50.8% | Added |
| Harbor Capital Advisors, Inc. | 21,674 | $1.78M | 0.14% | −3,047−12.3% | Reduced |
| State of Wisconsin Investment Board | 22,238 | $1.83M | 0.00% | −3,312−13.0% | Reduced |
| Alps Advisors Inc | 25,188 | $2.07M | 0.01% | −4,472−15.1% | Reduced |
| Congress Asset Management Co | 25,302 | $2.08M | 0.01% | +93+0.4% | Added |
| SummitTX Capital, L.P. | 25,448 | $2.09M | 0.09% | +25,448 | New |
| Knott David M Jr | 25,700 | $2.11M | 0.88% | 00.0% | Unchanged |
| Blue Owl Capital Holdings LP | 26,823 | $2.20M | 0.68% | +26,823 | New |
| HealthInvest Partners AB | 25,732 | $2.24M | 0.83% | 00.0% | Unchanged |
| DekaBank Deutsche Girozentrale | 30,000 | $2.27M | 0.00% | 00.0% | Unchanged |
| Legal & General Group Plc | 28,993 | $2.38M | 0.00% | −5,819−16.7% | Reduced |
| California State Teachers Retirement System | 30,088 | $2.47M | 0.00% | +10.0% | Added |
| ADAR1 Capital Management, LLC | 31,484 | $2.58M | 0.26% | +17,522+125.5% | Added |
| AQR Capital Management LLC | 31,715 | $2.60M | 0.00% | +23,158+270.6% | Added |
| Sector Gamma AS | 32,009 | $2.63M | 0.65% | +7,009+28.0% | Added |
| Invesco Ltd. | 33,668 | $2.76M | 0.00% | +1,987+6.3% | Added |
| Wells Fargo & Company | 34,426 | $2.83M | 0.00% | +3,837+12.5% | Added |
| Dark Forest Capital Management LP | 36,794 | $3.02M | 0.11% | +16,761+83.7% | Added |
| NEOS Investment Management LLC | 36,809 | $3.02M | 0.02% | +2,940+8.7% | Added |
| Tema ETFs LLC | 36,809 | $3.02M | 0.25% | +2,940+8.7% | Added |
| Millennium Management LLC | 40,341 | $3.31M | 0.00% | −54,221−57.3% | Reduced |
| Schroder Investment Management Group | 42,478 | $3.36M | 0.00% | −17,522−29.2% | Reduced |
| Edmond de Rothschild Holding S.A. | 45,480 | $3.73M | 0.06% | 00.0% | Unchanged |
| Alliancebernstein L.P. | 46,327 | $3.80M | 0.00% | −1,828−3.8% | Reduced |
| Balyasny Asset Management LLC | 48,691 | $4.00M | 0.01% | −6,101−11.1% | Reduced |
| Rafferty Asset Management, LLC | 49,240 | $4.04M | 0.01% | −7,131−12.7% | Reduced |
| Jain Global LLC | 50,011 | $4.11M | 0.05% | +35,730+250.2% | Added |
| Susquehanna Portfolio Strategies, LLC | 50,938 | $4.18M | 0.07% | 00.0% | Unchanged |
| Pathway Capital Management, LP | 51,051 | $4.19M | 20.60% | +51,051 | New |
| Rhumbline Advisers | 52,428 | $4.30M | 0.00% | −2,712−4.9% | Reduced |
| Swiss National Bank | 53,400 | $4.38M | 0.00% | −9,500−15.1% | Reduced |
| Manufacturers Life Insurance Company, The | 53,853 | $4.42M | 0.00% | −6,302−10.5% | Reduced |
| Nicholas Investment Partners, LP | 58,894 | $4.84M | 0.37% | +17,827+43.4% | Added |
| Pier Capital, LLC | 60,215 | $4.94M | 0.77% | −3,419−5.4% | Reduced |
| Royal Bank of Canada | 62,898 | $5.16M | 0.00% | +61,478+4,329.4% | Added |
| Rhenman & Partners Asset Management AB | 65,250 | $5.36M | 0.59% | −2,000−3.0% | Reduced |
| BNP Paribas Arbitrage, SA | 68,833 | $5.65M | 0.00% | −6,596−8.7% | Reduced |
| Jane Street Group, LLC | 74,481 | $6.11M | 0.01% | +74,481 | New |
| Monaco Asset Management SAM | 78,589 | $6.45M | 2.40% | +78,589 | New |
| Samsara BioCapital, LLC | 81,165 | $6.66M | 0.87% | −20,292−20.0% | Reduced |
| Nuveen, LLC | 83,427 | $6.85M | 0.00% | −3,991−4.6% | Reduced |
| Dimensional Fund Advisors LP | 83,524 | $6.86M | 0.00% | −259,602−75.7% | Reduced |
| Citigroup Inc | 92,845 | $7.62M | 0.01% | −13,427−12.6% | Reduced |
| HighVista Strategies LLC | 96,177 | $7.90M | 1.94% | +60,463+169.3% | Added |
| Soleus Capital Management, L.P. | 100,000 | $8.21M | 0.44% | −23,031−18.7% | Reduced |
| Barclays PLC | 107,656 | $8.84M | 0.00% | −31,722−22.8% | Reduced |
| Raymond James Financial Inc | 126,503 | $10.4M | 0.00% | −7,544−5.6% | Reduced |
| Bank of New York Mellon Corp | 131,524 | $10.8M | 0.00% | −545−0.4% | Reduced |
| Russell Investments Group, Ltd. | 143,534 | $11.8M | 0.01% | +15,469+12.1% | Added |
| Parkman Healthcare Partners LLC | 149,848 | $12.3M | 1.35% | −24,428−14.0% | Reduced |
| Integral Health Asset Management, LLC | 150,000 | $12.3M | 0.90% | +150,000 | New |
| Logos Global Management LP | 165,000 | $13.5M | 1.34% | +165,000 | New |
| Ameriprise Financial Inc | 165,649 | $13.6M | 0.00% | +44,131+36.3% | Added |
| Baker Bros. Advisors LP | 166,825 | $13.7M | 0.10% | 00.0% | Unchanged |
| UBS Asset Management Americas Inc | 168,631 | $13.8M | 0.00% | −98,480−36.9% | Reduced |
| Bank of America Corp | 171,235 | $14.1M | 0.00% | −91,120−34.7% | Reduced |
| Victory Capital Management Inc | 172,049 | $14.1M | 0.01% | −27,692−13.9% | Reduced |
| Rock Springs Capital Management LP | 178,982 | $14.7M | 0.86% | −7,332−3.9% | Reduced |
| UBS Group AG | 189,376 | $15.5M | 0.00% | +40,459+27.2% | Added |
| Wellington Management Group LLP | 232,199 | $19.1M | 0.00% | −9,210−3.8% | Reduced |
| TD Asset Management Inc | 232,708 | $19.1M | 0.02% | +129,248+124.9% | Added |
| Woodline Partners LP | 241,389 | $19.8M | 0.09% | 00.0% | Unchanged |
| Voya Investment Management LLC | 247,408 | $20.3M | 0.02% | −28,268−10.3% | Reduced |
| First Turn Management, LLC | 313,733 | $25.8M | 3.87% | +98,510+45.8% | Added |
| Charles Schwab Investment Management Inc | 330,486 | $27.1M | 0.00% | +11,214+3.5% | Added |
| Northern Trust Corp | 334,551 | $27.5M | 0.00% | −11,424−3.3% | Reduced |
| Deutsche Bank AG | 399,319 | $32.8M | 0.01% | +69,955+21.2% | Added |
| American Century Companies Inc | 411,930 | $33.8M | 0.02% | −19,536−4.5% | Reduced |
| Pictet Asset Management Holding SA | 420,805 | $34.5M | 0.03% | +37,669+9.8% | Added |
| Lord, Abbett & Co. LLC | 424,000 | $34.8M | 0.10% | +86,424+25.6% | Added |
| Morgan Stanley | 432,882 | $35.5M | 0.00% | −84,631−16.4% | Reduced |
| Goldman Sachs Group Inc | 448,441 | $36.8M | 0.01% | −62,164−12.2% | Reduced |
| Affinity Asset Advisors, LLC | 500,000 | $41.0M | 3.82% | +5,000+1.0% | Added |
| Schonfeld Strategic Advisors LLC | 500,315 | $41.1M | 0.29% | +153,587+44.3% | Added |
| Bamco Inc | 550,236 | $45.2M | 0.12% | +32,227+6.2% | Added |
| Cormorant Asset Management, LP | 775,000 | $63.6M | 4.39% | −25,000−3.1% | Reduced |
| Capital World Investors | 783,011 | $64.3M | 0.01% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 882,503 | $72.5M | 0.00% | −94,465−9.7% | Reduced |
| Geode Capital Management, LLC | 926,304 | $76.1M | 0.00% | −35,474−3.7% | Reduced |
| Janus Henderson Group PLC | 1,013,921 | $83.2M | 0.04% | −9,661−0.9% | Reduced |
| Citadel Advisors LLC | 1,021,453 | $83.9M | 0.07% | +823,090+414.9% | Added |
| AJU IB Investment Co., Ltd. | 1,047,557 | $86.0M | 74.71% | 00.0% | Unchanged |
| Vestal Point Capital, LP | 1,250,000 | $102.6M | 4.66% | −1,500,000−54.5% | Reduced |
| Price T Rowe Associates Inc | 1,264,051 | $103.8M | 0.01% | −174,722−12.1% | Reduced |
| State Street Corp | 1,526,027 | $125.3M | 0.00% | −66,286−4.2% | Reduced |
| Sr One Capital Management, LP | 2,346,630 | $192.7M | 27.86% | 00.0% | Unchanged |