ARCELLX INC (ACLX) Top Institutional Shareholders
ARCELLX INC (ACLX) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended March 31, 2026. The institutional investors covered on this page collectively reported approximately $5.92B in ACLX holdings during the latest filing period.
Gilead Sciences, Inc. is currently the largest disclosed institutional shareholder of ACLX tracked by InsiderSet, reporting ownership valued at approximately $771.68M in its March 31, 2026 SEC Form 13F filing.
The top 10 institutional shareholders tracked on this page collectively account for approximately 66% of the total disclosed ACLX value among the investors covered in this analysis. Major shareholders include Gilead Sciences, Inc., Paradigm Biocapital Advisors Lp, Blackrock, Inc., and several other long-term asset managers with concentrated positions in ARCELLX INC (ACLX).
This page ranks the largest institutional ACLX shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
233
Total Reported Value
$5.92B
Largest Holder
Gilead Sciences, Inc.
Largest Position
$771.68M
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
182
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Gilead Sciences, Inc. | 36.44% | 6,720,803 | $771,682,600 | — | — | — | |
| Paradigm Biocapital Advisors Lp | 13.55% | 5,774,016 | $662,972,517 | — | — | — | |
| Blackrock, Inc. | 0.01% | 3,945,238 | $452,992,229 | — | — | — | |
| Nea Management Company, Llc | 19.88% | 3,045,262 | $349,656,983 | — | — | — | |
| Pentwater Capital Management Lp | 2.34% | 2,870,000 | $329,533,400 | — | — | — | |
| Vanguard Capital Management Llc | 0.01% | 2,425,218 | $278,463,531 | — | — | — | |
| Vanguard Portfolio Management Llc | 0.01% | 2,424,818 | $278,417,603 | — | — | — | |
| Sr One Capital Management, Lp | 29.43% | 2,346,630 | $269,440,057 | — | — | — | |
| Fil Ltd | 0.21% | 2,339,192 | $268,586,025 | — | — | — | |
| Hbk Investments L P | 3.30% | 2,278,517 | $261,619,322 | — | — | — | |
| State Street Corp | 0.01% | 1,675,895 | $192,426,264 | — | — | — | |
| Goldman Sachs Group Inc | 0.02% | 1,312,155 | $150,661,637 | — | — | — | |
| Geode Capital Management, Llc | 0.01% | 1,028,666 | $118,135,702 | — | — | — | |
| Morgan Stanley | 0.01% | 925,813 | $106,301,939 | — | — | — | |
| Davidson Kempner Capital Management Lp | 1.38% | 559,644 | $64,258,324 | — | — | — | |
| Tig Advisors, Llc | 2.97% | 541,378 | $62,161,022 | — | — | — | |
| Millennium Management Llc | 0.04% | 502,846 | $57,736,778 | — | — | — | |
| Balyasny Asset Management L.P. | 0.11% | 479,763 | $55,086,388 | — | — | — | |
| Tudor Investment Corp Et Al | 0.29% | 462,588 | $53,114,354 | — | — | — | |
| Bank Of America Corp | 0.00% | 452,333 | $51,936,876 | — | — | — | |
| Magnetar Financial Llc | 0.46% | 394,931 | $45,345,977 | — | — | — | |
| Alpine Associates Management Inc. | 2.56% | 378,000 | $43,401,960 | — | — | — | |
| Nexpoint Asset Management, L.P. | 2.99% | 373,150 | $42,845,083 | — | — | — | |
| Affinity Asset Advisors, Llc | 2.44% | 362,764 | $41,652,562 | — | — | — | |
| Northern Trust Corp | 0.01% | 350,065 | $40,194,463 | — | — | — | |
| Charles Schwab Investment Management Inc | 0.01% | 346,092 | $39,738,283 | — | — | — | |
| Alliancebernstein L.P. | 0.01% | 544,227 | $35,483,600 | — | — | — | |
| Vanguard Fiduciary Trust Co | 0.01% | 308,546 | $35,427,252 | — | — | — | |
| Qube Research & Technologies Ltd | 0.05% | 303,847 | $34,887,713 | — | — | — | |
| First Trust Capital Management L.P. | 1.44% | 238,235 | $27,354,143 | — | — | — | |
| Aqr Arbitrage Llc | 0.44% | 231,730 | $26,607,239 | — | — | — | |
| Aju Ib Investment Co., Ltd. | 84.07% | 223,486 | $25,660,663 | — | — | — | |
| Lmr Partners Llp | 0.23% | 212,495 | $24,398,676 | — | — | — | |
| Barclays Plc | 0.01% | 207,642 | $23,841,455 | — | — | — | |
| Soros Fund Management Llc | 0.31% | 200,000 | $22,964,000 | — | — | — | |
| Gabelli Funds Llc | 0.15% | 195,900 | $22,493,238 | — | — | — | |
| Ubs Group Ag | 0.00% | 194,709 | $22,356,487 | — | — | — | |
| Verition Fund Management Llc | 0.21% | 187,354 | $21,511,986 | — | — | — | |
| Water Island Capital Llc | 2.81% | 183,409 | $21,059,022 | — | — | — | |
| Man Group Plc | 0.04% | 180,000 | $20,667,600 | — | — | — | |
| Rock Springs Capital Management Lp | 1.15% | 169,859 | $19,503,210 | — | — | — | |
| Gabelli & Co Investment Advisers, Inc. | 2.60% | 152,400 | $17,498,568 | — | — | — | |
| Bnp Paribas Financial Markets | 0.01% | 151,558 | $17,401,890 | — | — | — | |
| Bank Of New York Mellon Corp | 0.00% | 143,099 | $16,430,628 | — | — | — | |
| Credit Industriel Et Commercial | 2.46% | 134,648 | $15,460,283 | — | — | — | |
| Woodline Partners Lp | 0.05% | 123,750 | $14,208,975 | — | — | — | |
| Gardner Lewis Asset Management L P | 3.06% | 123,197 | $14,145,480 | — | — | — | |
| Hudson Bay Capital Management Lp | 0.09% | 122,900 | $14,111,378 | — | — | — | |
| Picton Mahoney Asset Management | 0.14% | 120,000 | $13,778,400 | — | — | — | |
| Fmr Llc | 0.00% | 119,378 | $13,707,035 | — | — | — |
Frequently asked questions about ACLX
Who owns the most ACLX stock?
The largest holders of ACLX are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for ARCELLX INC (ACLX).
Is ACLX widely held by superinvestors?
Many widely followed stocks like ACLX appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly ACLX is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.