Arcellx, Inc. - ACLX
Ownership (Schedule 13D / 13G) · latest 50 filings
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| Filed | Form | Reporting person | Percent | Shares | SEC |
|---|---|---|---|---|---|
| Mar 26, 2026 | SCHEDULE 13G/A | The Vanguard Group | 0.0% | 0 | View |
| Mar 06, 2026 | SCHEDULE 13G/A | T. Rowe Price Investment Management, Inc. | 4.5% | 2,653,848 | View |
| Mar 06, 2026 | SCHEDULE 13G/A | FMR LLC | 0.5% | 309,117 | View |
| Mar 06, 2026 | SCHEDULE 13G/A | Abigail P. Johnson | 0.5% | 309,117 | View |
| Feb 24, 2026 | SCHEDULE 13D/A | — | — | — | View |
| Feb 24, 2026 | SCHEDULE 13D/A | — | — | 58,464,222 | View |
| Feb 17, 2026 | SCHEDULE 13G | Vestal Point Capital, LP | 5.1% | 2,925,000 | View |
| Feb 17, 2026 | SCHEDULE 13G | Ryan Wilder | 5.1% | 2,925,000 | View |
| Feb 17, 2026 | SCHEDULE 13G/A | Paradigm BioCapital Advisors LP | 9.9% | 5,724,016 | View |
| Feb 17, 2026 | SCHEDULE 13G/A | Paradigm BioCapital Advisors GP LLC | 9.9% | 5,724,016 | View |
| Feb 17, 2026 | SCHEDULE 13G/A | Senai Asefaw, M.D. | 9.9% | 5,724,016 | View |
| Feb 17, 2026 | SCHEDULE 13G/A | Paradigm BioCapital International Fund Ltd. | 8.7% | 5,055,581 | View |
| Feb 17, 2026 | SCHEDULE 13G/A | RA Capital Management, L.P. | 2.2% | 1,267,156 | View |
| Feb 17, 2026 | SCHEDULE 13G/A | Peter Kolchinsky | 2.2% | 1,267,156 | View |
| Feb 17, 2026 | SCHEDULE 13G/A | Rajeev Shah | 2.2% | 1,267,156 | View |
| Feb 17, 2026 | SCHEDULE 13G/A | RA Capital Healthcare Fund, L.P. | 2.2% | 1,267,156 | View |
| Feb 17, 2026 | SCHEDULE 13G/A | T. Rowe Price Investment Management, Inc. | 18.3% | 10,560,425 | View |
| Feb 05, 2026 | SCHEDULE 13G/A | FMR LLC | 6.2% | 3,563,728 | View |
| Feb 05, 2026 | SCHEDULE 13G/A | Abigail P. Johnson | 6.2% | 3,563,728 | View |
| Dec 05, 2025 | SCHEDULE 13G/A | T. Rowe Price Investment Management, Inc. | 16.6% | 9,604,634 | View |
| Nov 05, 2025 | SCHEDULE 13G/A | FMR LLC | 10.4% | 5,761,317 | View |
| Nov 05, 2025 | SCHEDULE 13G/A | Abigail P. Johnson | 10.4% | 5,761,317 | View |
Percent = "% of class represented by amount beneficially owned" for this reporting person in the filed 13D/13G.
Shares = reported beneficial ownership amount for the same row (not portfolio shares from 13F).
Amendments (/A) can repeat the same holder over time, so rows should not be summed.
Extraction is best-effort from filing text and can be missing or noisy; verify exact figures via the SEC link in each row.