🕵️ Arcellx, Inc. ($ACLX)
SEC insider & ownership activity, last 12 months · CIK 1786205 · every row links its SEC filing
Over the last 12 months insiders sold $18.6M with no open-market buying against it. Elghandour Rami sold $10.2M in discretionary trades (Feb). Gilead Sciences, Inc. added 11.5% → 100.0%. One red-flag 8-K in the window: Delisting notice (3.01), Apr 28, 2026.
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Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
0 buyers, $0 (0 lots) · 4 sellers, $18.6M (22 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Elghandour Rami | 0 | – | 1 | $10.2M | Feb 27, 2026 |
| Heery Christopher | 0 | – | 11 | $4.3M | Jan 14, 2026 |
| Gilson Michelle | 0 | – | 9 | $3.6M | Feb 25, 2026 |
| Lubner David Charles | 0 | – | 1 | $450K | Jan 20, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Gilead Sciences, Inc. | 100.0% | 13D | Apr 28, 2026 | filing ↗ | |
| Paradigm Biocapital Advisors LP | 9.9% | 13G | Feb 17, 2026 | filing ↗ | |
| Paradigm Biocapital Advisors GP LLC | 9.9% | 13G | Feb 17, 2026 | filing ↗ | |
| Senai Asefaw, M.D. | 9.9% | 13G | Feb 17, 2026 | filing ↗ | |
| Paradigm Biocapital International Fund Ltd. | 8.7% | 13G | Feb 17, 2026 | filing ↗ | |
| Blackrock, Inc. | 6.4% | 13G | Apr 17, 2025 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Elghandour Rami | $10.2M | Feb 27, 2026 | filing ↗ |
| Gilson Michelle | $1.3M | Feb 25, 2026 | filing ↗ |
| Gilson Michelle | $573K | Feb 19, 2026 | filing ↗ |
| Gilson Michelle | $785K | Feb 17, 2026 | filing ↗ |
| David Lubner | $1.0M | Jan 20, 2026 | filing ↗ |
| Heery Christopher | $403K | Jan 14, 2026 | filing ↗ |
| Heery Christopher | $487K | Jan 13, 2026 | filing ↗ |
| Heery Christopher | $393K | Jan 12, 2026 | filing ↗ |
| Michelle Gilson | $468K | Oct 15, 2025 | filing ↗ |
| Michelle Gilson | $489K | Oct 3, 2025 | filing ↗ |
| Christopher Heery | $2.9M | Sep 18, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Acquisition or disposition (2.01) | Apr 28, 2026 | filing ↗ |
| Delisting notice (3.01) | Apr 28, 2026 | filing ↗ |
| Material Modifications to Rights of Security Holders (3.03) | Apr 28, 2026 | filing ↗ |
| Change of control (5.01) | Apr 28, 2026 | filing ↗ |
| Officer/director changes (5.02) | Apr 28, 2026 | filing ↗ |
| Charter/bylaw changes (5.03) | Apr 28, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 28, 2026 | filing ↗ |
| Material agreement (1.01) | Feb 22, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Feb 22, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 22, 2026 | filing ↗ |
| Other events (8.01) | Dec 6, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Dec 6, 2025 | filing ↗ |
| Earnings (2.02) | Nov 5, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 5, 2025 | filing ↗ |
| Earnings (2.02) | Aug 7, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 7, 2025 | filing ↗ |