Arcellx, Inc. (ACLX) — Institutional Holders, Q2 2026
2 institutional investment managers reported a ACLX position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $3.4M. Every filer is listed below, ranked by position value. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.
ACLX in Q2 2026: what funds did
Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.
Biggest buyers
- IFP AdvisorsAdded · +1 sh+$115.00
Biggest sellers
- GILEAD SCIENCESSold out · -6,720,803 sh-$773.4M
- Paradigm Biocapital AdvisorsSold out · -5,774,016 sh-$664.5M
- BlackRockSold out · -3,945,238 sh-$454.0M
- NEA Management CompanySold out · -3,045,262 sh-$350.4M
- Pentwater Capital ManagementSold out · -2,870,000 sh-$330.3M
ACLX 13F holders ranked 1–2 of 2
| # | Institution | Shares | Value | % of portfolio | QoQShares vs Q1 2026 |
|---|---|---|---|---|---|
| 1 | DekaBank Deutsche Girozentrale#1 · 30,000 sh | 30,000 | $3.4M | <0.01% | 0.0% |
| 2 | IFP Advisors#2 · 13 sh | 13 | $1.5K | — | +8.3% |
Funds that sold out of ACLX in Q2 2026 (232)
Held ACLX at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.
| Institution | Shares sold | Value in Q1 2026 |
|---|---|---|
| GILEAD SCIENCES6,720,803 sh | 6,720,803 | $771.7M |
| Paradigm Biocapital Advisors5,774,016 sh | 5,774,016 | $663.0M |
| BlackRock3,945,238 sh | 3,945,238 | $453.0M |
| NEA Management Company3,045,262 sh | 3,045,262 | $349.7M |
| Pentwater Capital Management2,870,000 sh | 2,870,000 | $329.5M |
| VANGUARD CAPITAL MANAGEMENT2,425,218 sh | 2,425,218 | $278.5M |
| VANGUARD PORTFOLIO MANAGEMENT2,424,818 sh | 2,424,818 | $278.4M |
| SR ONE CAPITAL MANAGEMENT2,346,630 sh | 2,346,630 | $269.4M |
| FIL Ltd2,339,192 sh | 2,339,192 | $268.6M |
| HBK INVESTMENTS L P2,278,517 sh | 2,278,517 | $261.6M |
| T. Rowe Price Investment Management2,255,878 sh | 2,255,878 | $259.0M |
| STATE STREET1,675,895 sh | 1,675,895 | $192.4M |
| GLAZER CAPITAL1,507,128 sh | 1,507,128 | $173.0M |
| GOLDMAN SACHS GROUP1,312,155 sh | 1,312,155 | $150.7M |
| GEODE CAPITAL MANAGEMENT1,028,666 sh | 1,028,666 | $118.1M |
| MORGAN STANLEY925,813 sh | 925,813 | $106.3M |
| JPMORGAN CHASE593,573 sh | 593,573 | $68.1M |
| DAVIDSON KEMPNER CAPITAL MANAGEMENT559,644 sh | 559,644 | $64.3M |
| TIG Advisors541,378 sh | 541,378 | $62.2M |
| MILLENNIUM MANAGEMENT502,846 sh | 502,846 | $57.7M |
| BALYASNY ASSET MANAGEMENT L.P.479,763 sh | 479,763 | $55.1M |
| TUDOR INVESTMENT ET AL462,588 sh | 462,588 | $53.1M |
| BANK OF AMERICA452,333 sh | 452,333 | $51.9M |
| Magnetar Financial394,931 sh | 394,931 | $45.3M |
| ALPINE ASSOCIATES MANAGEMENT378,000 sh | 378,000 | $43.4M |
| NEXPOINT ASSET MANAGEMENT, L.P.373,150 sh | 373,150 | $42.8M |
| Affinity Asset Advisors362,764 sh | 362,764 | $41.7M |
| NORTHERN350,065 sh | 350,065 | $40.2M |
| CHARLES SCHWAB INVESTMENT MANAGEMENT346,092 sh | 346,092 | $39.7M |
| ALLIANCEBERNSTEIN L.P.544,227 sh | 544,227 | $35.5M |
| VANGUARD FIDUCIARY308,546 sh | 308,546 | $35.4M |
| Qube Research & Technologies Ltd303,847 sh | 303,847 | $34.9M |
| First Capital Management L.P.238,235 sh | 238,235 | $27.4M |
| AQR Arbitrage231,730 sh | 231,730 | $26.6M |
| LMR Partners LLP212,495 sh | 212,495 | $24.4M |
| BARCLAYS PLC207,642 sh | 207,642 | $23.8M |
| SOROS FUND MANAGEMENT200,000 sh | 200,000 | $23.0M |
| GABELLI FUNDS195,900 sh | 195,900 | $22.5M |
| UBS Group AG194,709 sh | 194,709 | $22.4M |
| Verition Fund Management187,354 sh | 187,354 | $21.5M |
| WATER ISLAND CAPITAL183,409 sh | 183,409 | $21.1M |
| Man Group plc180,000 sh | 180,000 | $20.7M |
| Rock Springs Capital Management169,859 sh | 169,859 | $19.5M |
| GABELLI & INVESTMENT ADVISERS152,400 sh | 152,400 | $17.5M |
| BNP PARIBAS FINANCIAL MARKETS151,558 sh | 151,558 | $17.4M |
| Groupe la Francaise151,046 sh | 151,046 | $17.3M |
| Bank of New York Mellon143,099 sh | 143,099 | $16.4M |
| CREDIT INDUSTRIEL ET COMMERCIAL134,648 sh | 134,648 | $15.5M |
| Woodline Partners123,750 sh | 123,750 | $14.2M |
| GARDNER LEWIS ASSET MANAGEMENT L P123,197 sh | 123,197 | $14.1M |
| Hudson Bay Capital Management122,900 sh | 122,900 | $14.1M |
| PICTON MAHONEY ASSET MANAGEMENT120,000 sh | 120,000 | $13.8M |
| FMR119,378 sh | 119,378 | $13.7M |
| Slotnik Capital118,000 sh | 118,000 | $13.5M |
| ODDO BHF ASSET MANAGEMENT SAS115,000 sh | 115,000 | $13.2M |
| PRELUDE CAPITAL MANAGEMENT98,849 sh | 98,849 | $11.3M |
| RENAISSANCE TECHNOLOGIES96,400 sh | 96,400 | $11.1M |
| Nuveen85,294 sh | 85,294 | $9.8M |
| DEUTSCHE BANK AG\80,664 sh | 80,664 | $9.3M |
| Cinctive Capital Management80,000 sh | 80,000 | $9.2M |
| Chicago Capital Management92,951 sh | 92,951 | $8.0M |
| Sagefield Capital65,097 sh | 65,097 | $7.5M |
| Athos Capital Ltd64,900 sh | 64,900 | $7.5M |
| Russell Investments Group, Ltd.61,905 sh | 61,905 | $7.1M |
| Samsara BioCapital60,873 sh | 60,873 | $7.0M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AME57,289 sh | 57,289 | $6.6M |
| Voleon Capital Management56,720 sh | 56,720 | $6.5M |
| PSquared Asset Management AG55,251 sh | 55,251 | $6.3M |
| Swiss National Bank54,700 sh | 54,700 | $6.3M |
| Twin Securities53,982 sh | 53,982 | $6.2M |
| Susquehanna Portfolio Strategies50,938 sh | 50,938 | $5.8M |
| HARVEST MANAGEMENT50,000 sh | 50,000 | $5.7M |
| CONGRESS ASSET MANAGEMENT47,551 sh | 47,551 | $5.5M |
| Invesco Ltd.47,280 sh | 47,280 | $5.4M |
| PRICE T ROWE ASSOCIATES45,954 sh | 45,954 | $5.3M |
| RHUMBLINE ADVISERS45,211 sh | 45,211 | $5.2M |
| Maven Securities LTD42,500 sh | 42,500 | $4.9M |
| Rafferty Asset Management39,441 sh | 39,441 | $4.5M |
| EQUITEC PROPRIETARY MARKETS33,574 sh | 33,574 | $3.9M |
| ADAR1 Capital Management32,084 sh | 32,084 | $3.7M |
| FIFTH LANE CAPITAL31,044 sh | 31,044 | $3.6M |
| ABC ARBITRAGE SA30,347 sh | 30,347 | $3.5M |
| HEALTHCARE OF ONTARIO PENSION PLAN FUND30,000 sh | 30,000 | $3.4M |
| VANGUARD ASSET MANAGEMENT, Ltd27,521 sh | 27,521 | $3.2M |
| Squarepoint Ops27,145 sh | 27,145 | $3.1M |
| NEW YORK LIFE INVESTMENT MANAGEMENT26,243 sh | 26,243 | $3.0M |
| SG Americas Securities24,713 sh | 24,713 | $2.8M |
| Yakira Capital Management24,000 sh | 24,000 | $2.8M |
| Skandinaviska Enskilda Banken AB (publ)24,000 sh | 24,000 | $2.8M |
| Legal & General Group Plc21,888 sh | 21,888 | $2.5M |
| CITADEL ADVISORS21,806 sh | 21,806 | $2.5M |
| Erste Asset Management GmbH21,000 sh | 21,000 | $2.4M |
| MetLife Investment Management20,914 sh | 20,914 | $2.4M |
| MIRAE ASSET GLOBAL ETFS Ltd.20,806 sh | 20,806 | $2.4M |
| Vestcor19,578 sh | 19,578 | $2.2M |
| Knott David M Jr19,433 sh | 19,433 | $2.2M |
| Abu Dhabi Investment Council P.J.S.C19,338 sh | 19,338 | $2.2M |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP19,201 sh | 19,201 | $2.2M |
| Carmignac Gestion18,925 sh | 18,925 | $2.2M |
| Fortress Investment Group18,183 sh | 18,183 | $2.1M |
And 132 smaller positions.
Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.