Institutional Ownership
Arcellx Inc
CUSIP 03940C100COMMON STOCKACLXGBXQ1 2026
13D / 13G Filings
58
Schedule 13D/13G on record
Beneficial Filers
21
Distinct reporting persons
Largest Stake
19.2%
Max % of class reported
Institutional Holders
230
13F filers (latest quarter)
Beneficial Owners — Schedule 13D / 13G
58 filings · latest Mar 6, 2026
| # | Filed | Reporting Person | Form | % of Class | Shares | Filing |
|---|---|---|---|---|---|---|
| 1 | Mar 6, 2026 | T. Rowe Price Investment Management, Inc. | 13G/A | 4.5% | 2.65M | SEC |
| 2 | Mar 6, 2026 | Fmr LLC | 13G/A | 0.5% | 309.1K | SEC |
| 3 | Feb 24, 2026 | Rami Elghandour | 13D/A | 6.4% | — | SEC |
| 4 | Feb 24, 2026 | New Enterprise Associates 15, L.P. | 13D/A | 5.3% | — | SEC |
| 5 | Feb 23, 2026 | Gilead Sciences, Inc. | 13D | 11.5% | — | SEC |
| 6 | Feb 17, 2026 | T. Rowe Price Investment Management, Inc. | 13G/A | 18.3% | 10.56M | SEC |
| 7 | Feb 17, 2026 | Ra Capital Management, L.P. | 13G/A | 2.2% | 1.27M | SEC |
| 8 | Feb 17, 2026 | Paradigm Biocapital Advisors LP | 13G/A | 9.9% | 9.23B | SEC |
| 9 | Feb 17, 2026 | Vestal Point Capital, LP | 13G | 5.1% | 2.92M | SEC |
| 10 | Feb 5, 2026 | Fmr LLC | 13G/A | 6.2% | 3.56M | SEC |
48 more beneficial-ownership filings on Premium
See the full Schedule 13D/13G history for Arcellx Inc.
Unlock full historyTop Institutional Holders (13F)
Largest reported positions · latest quarter
| # | Fund | Shares | Value |
|---|---|---|---|
| 1 | Gilead Sciences, Inc. | 6.72M | $771.68M |
| 2 | Paradigm Biocapital Advisors LP | 5.77M | $662.97M |
| 3 | Blackrock, Inc. | 3.95M | $452.99M |
| 4 | Nea Management Company, LLC | 3.05M | $349.66M |
| 5 | Pentwater Capital Management LP | 2.87M | $329.53M |
| 6 | Sr One Capital Management, LP | 2.35M | $269.44M |
| 7 | Fil Ltd | 2.34M | $268.59M |
| 8 | Hbk Investments L P | 2.28M | $261.62M |
| 9 | State Street Corp | 1.68M | $192.43M |
| 10 | Goldman Sachs Group Inc | 1.31M | $150.66M |