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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.

Overview All Filings Annual Quarterly Insiders
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