Arcellx, Inc. — Director's Dealing 2023

Jan 5, 2023

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Arcellx, Inc. (ACLX)
CIK: 0001786205
Period of Report: 2023-01-03

Reporting Person: Elghandour Rami (Director, See Remarks)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2023-01-03	Stock Option (right to buy)	$31.03	A	245065	Acquired	2033-01-03	Common Stock (245065)	Direct
2023-01-03	Restricted Stock Unit	$	A	159292	Acquired		Common Stock (159292)	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 forty-eighth (1/48th) of the shares subject to the option will vest each month following the Vesting Commencement Date on the same day of the month as the Vesting Commencement Date (or, if there is no corresponding day in a particular month, then the last day of the month) over four (4) years. "Vesting Commencement Date" shall mean January 1, 2023.

F2: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

F3: 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 RSUs subject to the award will vest each year following the RSU Grant Date on the same day of the month as the RSU Grant Date (or, if there is no corresponding day in a particular month, then the last day of the month) over three (3) years. "RSU Grant Date" shall mean January 3, 2023.