Arcellx, Inc. — Director's Dealing 2023

May 11, 2023

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Arcellx, Inc. (ACLX)
CIK: 0001786205
Period of Report: 2023-05-09

Reporting Person: Heery Christopher (Chief Medical Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2023-05-09	Common Stock	S	500	$45.00	Disposed	9992	Direct
2023-05-10	Common Stock	S	2197	$45.1824	Disposed	7795	Direct

Footnotes

F1: The sale of shares reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan entered into by the Reporting Person on June 30, 2022.

F2: Represents the weighted average share price of an aggregate total of 2,197 shares sold in the price range of $45.00 to $45.72 by the Reporting Person. The Reporting Person undertakes to provide upon request by the Commission staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price.