Arcellx, Inc. - ACLX

Ownership (Schedule 13D / 13G) · latest 50 filings · Back to all files
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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.