Arcellx, Inc. — Director's Dealing 2026

Mar 4, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Arcellx, Inc. (ACLX)
CIK: 0001786205
Period of Report: 2026-03-04

Reporting Person: Elghandour Rami (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-03-04	Common Stock	G	101164	—	Disposed	174887	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	198000	Indirect
Common Stock	218500	Indirect
Common Stock	101164	Indirect

Footnotes

F1: On March 4, 2026, the Reporting Person transferred, for no consideration, 101,164 shares to a family charitable foundation of which the Reporting Person serves as the President. The Reporting Person has voting and investment power over all securities owned by the foundation.

F2: Shares held by a spousal lifetime access non-grantor trust, of which the Reporting Person's spouse is the beneficiary and for which the Reporting Person may be deemed to have Section 16 beneficial ownership. The Reporting Person disclaims beneficial ownership except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such shares for Section 16 or any other purpose.

F3: Shares held by a spousal lifetime access non-grantor trust of which the Reporting Person is a beneficiary and for which the Reporting Person may be deemed to have Section 16 beneficial ownership. The Reporting Person disclaims beneficial ownership except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such shares for Section 16 or any other purpose.