Arcellx, Inc. — Director's Dealing 2025

Mar 20, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Arcellx, Inc. (ACLX)
CIK: 0001786205
Period of Report: 2025-03-18

Reporting Person: Myers Kristin (N/A)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-03-18	Stock Option (right to buy)	$69.87	A	16829	Acquired	2035-03-18	Common Stock (16829)	Direct

Footnotes

F1: Subject to the Reporting Person continuing to be a Service Provider (as defined in the Issuer's 2022 Equity Incentive Plan) through each applicable vesting date, one-third (1/3rd) of the shares subject to the option will vest each year following the Equity Grant Date on the same day of the month as the Equity Grant Date (or, if there is no corresponding day in a particular month, then the last day of the month) over three (3) years. "Equity Grant Date" shall mean March 18, 2025.