Arcellx, Inc. — Insider Transactions
Form 4 filings by directors, officers, and 10%+ shareholders
SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.
| Insider | Title | Type | Shares | Price | Value | Owns After | Date |
|---|---|---|---|---|---|---|---|
| Heery Christopher | CHIEF MEDICAL OFFICER | Sale | 340 | $90.00 | $30,600 | 284 | Nov 17, 2025 |
| Gilson Michelle | CHIEF FINANCIAL OFFICER | Sale | 5,364 | $91.04 | $488,339 | 8,466 | Oct 15, 2025 |
| Gilson Michelle | CHIEF FINANCIAL OFFICER | Sale | 4,882 | $86.00 | $419,852 | 14,894 | Oct 6, 2025 |
| Heery Christopher | CHIEF MEDICAL OFFICER | Sale | 5,300 | $80.55 | $426,915 | 16,358 | Sep 30, 2025 |
| Heery Christopher | CHIEF MEDICAL OFFICER | Sale | 73 | $80.16 | $5,852 | 21,658 | Sep 29, 2025 |
| Heery Christopher | CHIEF MEDICAL OFFICER | Sale | 12,396 | $80.12 | $993,168 | 21,731 | Sep 26, 2025 |
| Heery Christopher | CHIEF MEDICAL OFFICER | Sale | 3,343 | $80.01 | $267,473 | 34,427 | Sep 19, 2025 |
| Elghandour Rami | SEE REMARKS | Tax Withholding | 546,938 | $70.25 | $38,422,395 | 617,919 | Aug 28, 2025 |
| Behbahani Ali | — | Other | 1,586 | — | — | 1,925 | Aug 12, 2025 |
| Patel Kavita | — | Sale | 1,500 | $67.36 | $101,040 | — | Jun 10, 2025 |
| Gilson Michelle | CHIEF FINANCIAL OFFICER | Sale | 8,449 | $64.38 | $543,947 | 19,776 | May 27, 2025 |
| Patel Kavita | — | Sale | 1,500 | $58.43 | $87,645 | — | May 20, 2025 |
| Patel Kavita | — | Option Exercise | 1,500 | $6.66 | $9,990 | 1,500 | Apr 29, 2025 |
| Patel Kavita | — | Sale | 1,500 | $57.50 | $86,250 | — | Apr 8, 2025 |
| Patel Kavita | — | Sale | 1,500 | $71.64 | $107,460 | — | Mar 18, 2025 |
| Elghandour Rami | SEE REMARKS | Award / Grant | 668,416 | — | — | 817,602 | Feb 27, 2025 |
| Patel Kavita | — | Option Exercise | 1,500 | $6.66 | $9,990 | 1,500 | Feb 25, 2025 |
| Heery Christopher | CHIEF MEDICAL OFFICER | Sale | 5,577 | $64.26 | $358,378 | 37,694 | Feb 24, 2025 |
| Elghandour Rami | SEE REMARKS | Sale | 10,889 | $62.69 | $682,631 | 149,186 | Feb 7, 2025 |
| Heery Christopher | CHIEF MEDICAL OFFICER | Option Exercise | 22,556 | — | — | 47,641 | Feb 7, 2025 |
| Elghandour Rami | SEE REMARKS | Option Exercise | 70,211 | — | — | 187,486 | Feb 7, 2025 |
| Patel Kavita | — | Option Exercise | 1,500 | $6.66 | $9,990 | 1,500 | Feb 4, 2025 |
| Patel Kavita | — | Sale | 800 | $64.95 | $51,960 | 700 | Jan 14, 2025 |
| Heery Christopher | CHIEF MEDICAL OFFICER | Sale | 4,230 | $75.53 | $319,492 | 28,638 | Jan 8, 2025 |
| Gilson Michelle | CHIEF FINANCIAL OFFICER | Sale | 2,327 | $77.06 | $179,319 | 18,339 | Jan 7, 2025 |
| Elghandour Rami | SEE REMARKS | Option Exercise | 53,097 | — | — | 177,809 | Jan 7, 2025 |
| Heery Christopher | CHIEF MEDICAL OFFICER | Option Exercise | 13,021 | — | — | 22,299 | Jan 6, 2025 |
| Elghandour Rami | SEE REMARKS | Option Exercise | 53,097 | — | — | 177,809 | Jan 6, 2025 |
| Elghandour Rami | SEE REMARKS | Option Exercise | 55,459 | — | — | 124,712 | Jan 3, 2025 |
| Heery Christopher | CHIEF MEDICAL OFFICER | Sale | 3,061 | $77.17 | $236,217 | 32,456 | Jan 3, 2025 |
| Gilson Michelle | CHIEF FINANCIAL OFFICER | Sale | 5,621 | $77.17 | $433,773 | 27,591 | Jan 2, 2025 |
| Gilson Michelle | CHIEF FINANCIAL OFFICER | Option Exercise | 15,339 | — | — | 38,834 | Jan 2, 2025 |
| Heery Christopher | CHIEF MEDICAL OFFICER | Option Exercise | 16,519 | — | — | 38,818 | Jan 2, 2025 |
| Patel Kavita | — | Sale | 100 | $77.61 | $7,761 | — | Dec 24, 2024 |
| Patel Kavita | — | Option Exercise | 1,500 | $6.66 | $9,990 | 1,500 | Dec 3, 2024 |
| Gilson Michelle | CHIEF FINANCIAL OFFICER | Option Exercise | 3,000 | $8.66 | $25,980 | 3,000 | Nov 15, 2024 |
| Patel Kavita | — | Sale | 1,500 | $106.33 | $159,495 | — | Nov 12, 2024 |
| Gilson Michelle | CHIEF FINANCIAL OFFICER | Sale | 801 | $102.33 | $81,966 | 1,761 | Nov 8, 2024 |
| Patel Kavita | — | Sale | 5,900 | $99.60 | $587,640 | 27,863 | Nov 7, 2024 |
| Patel Kavita | — | Option Exercise | 1,500 | $6.66 | $9,990 | 1,500 | Oct 22, 2024 |
| Patel Kavita | — | Sale | 1,500 | $82.24 | $123,360 | — | Oct 1, 2024 |
| Gilson Michelle | CHIEF FINANCIAL OFFICER | Sale | 8,726 | $77.88 | $679,581 | 6,915 | Sep 17, 2024 |
| Patel Kavita | — | Option Exercise | 1,500 | $6.66 | $9,990 | 1,500 | Sep 10, 2024 |
| Heery Christopher | CHIEF MEDICAL OFFICER | Sale | 3,421 | $70.02 | $239,538 | 9,278 | Sep 5, 2024 |
| Heery Christopher | CHIEF MEDICAL OFFICER | Sale | 14,776 | $66.05 | $975,955 | 21,953 | Sep 3, 2024 |
| Heery Christopher | CHIEF MEDICAL OFFICER | Sale | 6,432 | $70.61 | $454,164 | 24,530 | Aug 26, 2024 |
| Patel Kavita | — | Sale | 1,500 | $65.88 | $98,820 | — | Aug 20, 2024 |
| Heery Christopher | CHIEF MEDICAL OFFICER | Sale | 5,450 | $65.05 | $354,523 | 9,278 | Aug 16, 2024 |
| Heery Christopher | CHIEF MEDICAL OFFICER | Sale | 19,268 | $60.39 | $1,163,595 | 10,010 | Aug 1, 2024 |
| Patel Kavita | — | Option Exercise | 1,500 | $6.66 | $9,990 | 1,500 | Jul 30, 2024 |