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 |
|---|---|---|---|---|---|
| Mariner, LLC | 6,280 | $721.1K | 0.00% | +3,167+101.7% | Added |
| GTS Securities LLC | 6,338 | $727.7K | 0.03% | +6,338 | New |
| Voya Investment Management LLC | 6,378 | $732.3K | 0.00% | −162,302−96.2% | Reduced |
| Transmarket Holdings LP | 6,557 | $752.9K | 0.40% | +6,557 | New |
| Vanguard Investments Australia, Ltd. | 6,638 | $762.2K | 0.00% | +6,638 | New |
| Torno Capital, LLC | 7,285 | $836.5K | 0.35% | +7,285 | New |
| Aspiriant, LLC | 7,332 | $841.9K | 0.02% | −578−7.3% | Reduced |
| CSS LLC | 7,600 | $872.6K | 0.05% | +7,600 | New |
| Arizona State Retirement System | 7,616 | $874.5K | 0.01% | +30.0% | Added |
| Citigroup Inc | 7,816 | $897.4K | 0.00% | −148,703−95.0% | Reduced |
| Kapitalo Investimentos Ltda | 7,978 | $916.0K | 0.17% | +7,978 | New |
| High Net Worth Advisory Group LLC | 8,000 | $918.6K | 0.21% | 00.0% | Unchanged |
| Nomura Holdings Inc | 9,301 | $1.07M | 0.01% | +9,301 | New |
| State of New Jersey Common Pension Fund D | 9,477 | $1.09M | 0.00% | +12+0.1% | Added |
| Point72 Asset Management, L.P. | 9,843 | $1.13M | 0.00% | +9,843 | New |
| China Universal Asset Management Co., Ltd. | 10,378 | $1.19M | 0.09% | +956+10.1% | Added |
| Police & Firemen's Retirement System of New Jersey | 10,445 | $1.20M | 0.01% | +1,371+15.1% | Added |
| State Board of Administration of Florida Retirement System | 10,850 | $1.25M | 0.00% | 00.0% | Unchanged |
| ProShare Advisors LLC | 11,378 | $1.31M | 0.00% | +2,560+29.0% | Added |
| RK Capital Management, LLC | 11,858 | $1.36M | 3.13% | +11,858 | New |
| Manufacturers Life Insurance Company, The | 11,965 | $1.37M | 0.00% | −45,286−79.1% | Reduced |
| Mint Tower Capital Management B.V. | 12,000 | $1.38M | 0.14% | +12,000 | New |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 12,314 | $1.41M | 0.00% | +1,197+10.8% | Added |
| New York State Common Retirement Fund | 12,523 | $1.44M | 0.00% | +900+7.7% | Added |
| Handelsbanken Fonder AB | 13,000 | $1.49M | 0.00% | 00.0% | Unchanged |
| Jasper Ridge Partners, L.P. | 13,947 | $1.60M | 0.04% | 00.0% | Unchanged |
| Wells Fargo & Company | 14,393 | $1.65M | 0.00% | −39,867−73.5% | Reduced |
| Guggenheim Capital LLC | 14,809 | $1.70M | 0.01% | +6,271+73.4% | Added |
| ExodusPoint Capital Management, LP | 14,828 | $1.70M | 0.02% | −202,596−93.2% | Reduced |
| Creative Planning | 15,653 | $1.80M | 0.00% | +8,334+113.9% | Added |
| Vanguard Global Advisers, LLC | 17,372 | $1.99M | 0.00% | +17,372 | New |
| State of Wisconsin Investment Board | 17,434 | $2.00M | 0.00% | −3,484−16.7% | Reduced |
| Kintayl Capital LP | 17,468 | $2.01M | 1.23% | +17,468 | New |
| Profund Advisors LLC | 17,877 | $2.05M | 0.08% | −7,863−30.5% | Reduced |
| Fortress Investment Group LLC | 18,183 | $2.09M | 0.53% | +18,183 | New |
| Carmignac Gestion | 18,925 | $2.17M | 0.03% | +18,925 | New |
| Susquehanna International Group, LLP | 19,201 | $2.20M | 0.00% | +11,943+164.5% | Added |
| Abu Dhabi Investment Council Co P.J.S.C | 19,338 | $2.22M | 0.23% | +19,338 | New |
| Knott David M Jr | 19,433 | $2.23M | 1.33% | −6,267−24.4% | Reduced |
| Vestcor Inc | 19,578 | $2.25M | 0.06% | +19,578 | New |
| Mirae Asset Global ETFs Holdings Ltd. | 20,806 | $2.39M | 0.00% | +804+4.0% | Added |
| MetLife Investment Management | 20,914 | $2.40M | 0.01% | +1,570+8.1% | Added |
| Erste Asset Management GmbH | 21,000 | $2.41M | 0.02% | 00.0% | Unchanged |
| Citadel Advisors LLC | 21,806 | $2.50M | 0.00% | −1,478,417−98.5% | Reduced |
| Legal & General Group Plc | 21,888 | $2.51M | 0.00% | −7,677−26.0% | Reduced |
| Skandinaviska Enskilda Banken AB (publ) | 24,000 | $2.76M | 0.06% | +24,000 | New |
| Yakira Capital Management, Inc. | 24,000 | $2.76M | 0.81% | +24,000 | New |
| SG Americas Securities, LLC | 24,713 | $2.84M | 0.00% | +12,672+105.2% | Added |
| New York Life Investment Management LLC | 26,243 | $3.01M | 0.03% | +26,243 | New |
| Squarepoint Ops LLC | 27,145 | $3.12M | 0.01% | −22,730−45.6% | Reduced |
| Vanguard Asset Management, Ltd | 27,521 | $3.16M | 0.00% | +27,521 | New |
| Healthcare of Ontario Pension Plan Trust Fund | 30,000 | $3.44M | 0.01% | +30,000 | New |
| Abc Arbitrage SA | 30,347 | $3.48M | 0.46% | +30,347 | New |
| DekaBank Deutsche Girozentrale | 30,000 | $3.50M | 0.01% | 00.0% | Unchanged |
| Fifth Lane Capital, LP | 31,044 | $3.56M | 4.33% | +31,044 | New |
| ADAR1 Capital Management, LLC | 32,084 | $3.68M | 0.22% | +600+1.9% | Added |
| Equitec Proprietary Markets, LLC | 33,574 | $3.85M | 8.91% | +33,574 | New |
| California State Teachers Retirement System | 34,886 | $4.01M | 0.00% | +7,771+28.7% | Added |
| Rafferty Asset Management, LLC | 39,441 | $4.53M | 0.02% | −30,074−43.3% | Reduced |
| Maven Securities LTD | 42,500 | $4.88M | 0.28% | +42,500 | New |
| Rhumbline Advisers | 45,211 | $5.19M | 0.00% | +859+1.9% | Added |
| Price T Rowe Associates Inc | 45,954 | $5.28M | 0.00% | −1,564,847−97.1% | Reduced |
| Invesco Ltd. | 47,280 | $5.43M | 0.00% | +6,908+17.1% | Added |
| Congress Asset Management Co | 47,551 | $5.46M | 0.04% | +21,552+82.9% | Added |
| Harvest Management LLC | 50,000 | $5.74M | 3.05% | +50,000 | New |
| Susquehanna Portfolio Strategies, LLC | 50,938 | $5.85M | 0.09% | 00.0% | Unchanged |
| Twin Securities, Inc. | 53,982 | $6.20M | 3.06% | +53,982 | New |
| Swiss National Bank | 54,700 | $6.28M | 0.00% | 00.0% | Unchanged |
| PSquared Asset Management AG | 55,251 | $6.34M | 2.21% | +55,251 | New |
| Voleon Capital Management LP | 56,720 | $6.51M | 0.14% | +56,720 | New |
| UBS Asset Management Americas Inc | 57,289 | $6.58M | 0.00% | −103,746−64.4% | Reduced |
| Samsara BioCapital, LLC | 60,873 | $6.99M | 0.68% | 00.0% | Unchanged |
| Russell Investments Group, Ltd. | 61,905 | $7.11M | 0.01% | −68,615−52.6% | Reduced |
| Athos Capital Ltd | 64,900 | $7.45M | 2.30% | +64,900 | New |
| Sagefield Capital LP | 65,097 | $7.47M | 0.54% | +65,097 | New |
| Chicago Capital Management, LLC | 92,951 | $8.04M | 6.66% | +92,951 | New |
| Cinctive Capital Management LP | 80,000 | $9.19M | 0.60% | +80,000 | New |
| Deutsche Bank AG | 80,664 | $9.26M | 0.00% | −152,928−65.5% | Reduced |
| Nuveen, LLC | 85,294 | $9.79M | 0.00% | +3,350+4.1% | Added |
| CIBRA Capital Ltd | 88,623 | $10.2M | 4.91% | +88,623 | New |
| Janus Henderson Group PLC | 90,280 | $10.4M | 0.00% | −829,298−90.2% | Reduced |
| Renaissance Technologies LLC | 96,400 | $11.1M | 0.02% | +96,400 | New |
| Prelude Capital Management, LLC | 98,849 | $11.3M | 0.87% | +98,849 | New |
| Oddo BHF Asset Management SAS | 115,000 | $13.2M | 0.52% | +115,000 | New |
| Slotnik Capital, LLC | 118,000 | $13.5M | 4.03% | +118,000 | New |
| FMR LLC | 119,378 | $13.7M | 0.00% | −3,444,350−96.7% | Reduced |
| Picton Mahoney Asset Management | 120,000 | $13.8M | 0.14% | +120,000 | New |
| Hudson Bay Capital Management LP | 122,900 | $14.1M | 0.08% | −278,042−69.3% | Reduced |
| Gardner Lewis Asset Management L P | 123,197 | $14.1M | 3.06% | +123,197 | New |
| Woodline Partners LP | 123,750 | $14.2M | 0.05% | −614,074−83.2% | Reduced |
| Credit Industriel Et Commercial | 134,648 | $15.5M | 2.46% | +134,648 | New |
| Bank of New York Mellon Corp | 143,099 | $16.4M | 0.00% | +19,928+16.2% | Added |
| Groupe la Francaise | 151,046 | $17.3M | 0.24% | +151,046 | New |
| BNP Paribas Arbitrage, SA | 151,558 | $17.4M | 0.01% | +147,953+4,104.1% | Added |
| Gabelli & Co Investment Advisers, Inc. | 152,400 | $17.5M | 2.60% | +152,400 | New |
| Rock Springs Capital Management LP | 169,859 | $19.5M | 1.15% | 00.0% | Unchanged |
| Man Group plc | 180,000 | $20.7M | 0.04% | +176,678+5,318.4% | Added |
| Water Island Capital LLC | 183,409 | $21.1M | 2.81% | +183,409 | New |
| Verition Fund Management LLC | 187,354 | $21.5M | 0.21% | +187,354 | New |
| UBS Group AG | 194,709 | $22.4M | 0.00% | −121,903−38.5% | Reduced |