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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 Financials Insiders
Insider Title Type Shares Price Value Date
Heery Christopher CHIEF MEDICAL OFFICER Sale 340 $90.00 $30,600 Nov 17, 2025
Gilson Michelle CHIEF FINANCIAL OFFICER Sale 5,364 $91.04 $488,339 Oct 15, 2025
Gilson Michelle CHIEF FINANCIAL OFFICER Sale 4,882 $86.00 $419,852 Oct 6, 2025
Heery Christopher CHIEF MEDICAL OFFICER Sale 5,300 $80.55 $426,915 Sep 30, 2025
Heery Christopher CHIEF MEDICAL OFFICER Sale 73 $80.16 $5,852 Sep 29, 2025
Heery Christopher CHIEF MEDICAL OFFICER Sale 12,396 $80.12 $993,168 Sep 26, 2025
Heery Christopher CHIEF MEDICAL OFFICER Sale 3,343 $80.01 $267,473 Sep 19, 2025
Elghandour Rami SEE REMARKS Tax Withholding 546,938 $70.25 $38,422,395 Aug 28, 2025
Behbahani Ali Other 1,586 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 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 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 Feb 27, 2025
Patel Kavita Option Exercise 1,500 $6.66 $9,990 Feb 25, 2025
Heery Christopher CHIEF MEDICAL OFFICER Sale 5,577 $64.26 $358,378 Feb 24, 2025
Elghandour Rami SEE REMARKS Sale 10,889 $62.69 $682,631 Feb 7, 2025
Heery Christopher CHIEF MEDICAL OFFICER Option Exercise 22,556 Feb 7, 2025
Elghandour Rami SEE REMARKS Option Exercise 70,211 Feb 7, 2025
Patel Kavita Option Exercise 1,500 $6.66 $9,990 Feb 4, 2025
Patel Kavita Sale 800 $64.95 $51,960 Jan 14, 2025
Heery Christopher CHIEF MEDICAL OFFICER Sale 4,230 $75.53 $319,492 Jan 8, 2025
Gilson Michelle CHIEF FINANCIAL OFFICER Sale 2,327 $77.06 $179,319 Jan 7, 2025
Elghandour Rami SEE REMARKS Option Exercise 53,097 Jan 7, 2025
Heery Christopher CHIEF MEDICAL OFFICER Option Exercise 13,021 Jan 6, 2025
Elghandour Rami SEE REMARKS Option Exercise 53,097 Jan 6, 2025
Elghandour Rami SEE REMARKS Option Exercise 55,459 Jan 3, 2025
Heery Christopher CHIEF MEDICAL OFFICER Sale 3,061 $77.17 $236,217 Jan 3, 2025
Gilson Michelle CHIEF FINANCIAL OFFICER Sale 5,621 $77.17 $433,773 Jan 2, 2025
Gilson Michelle CHIEF FINANCIAL OFFICER Option Exercise 15,339 Jan 2, 2025
Heery Christopher CHIEF MEDICAL OFFICER Option Exercise 16,519 Jan 2, 2025
Patel Kavita Sale 100 $77.61 $7,761 Dec 24, 2024
Patel Kavita Option Exercise 1,500 $6.66 $9,990 Dec 3, 2024
Gilson Michelle CHIEF FINANCIAL OFFICER Option Exercise 3,000 $8.66 $25,980 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 Nov 8, 2024
Patel Kavita Sale 5,900 $99.60 $587,640 Nov 7, 2024
Patel Kavita Option Exercise 1,500 $6.66 $9,990 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 Sep 17, 2024
Patel Kavita Option Exercise 1,500 $6.66 $9,990 Sep 10, 2024
Heery Christopher CHIEF MEDICAL OFFICER Sale 3,421 $70.02 $239,538 Sep 5, 2024
Heery Christopher CHIEF MEDICAL OFFICER Sale 14,776 $66.05 $975,955 Sep 3, 2024
Heery Christopher CHIEF MEDICAL OFFICER Sale 6,432 $70.61 $454,164 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 Aug 16, 2024
Heery Christopher CHIEF MEDICAL OFFICER Sale 19,268 $60.39 $1,163,595 Aug 1, 2024
Patel Kavita Option Exercise 1,500 $6.66 $9,990 Jul 30, 2024