Christopher Heery - Feb 7, 2024 Form 4 Insider Report for Arcellx, Inc. (ACLX)

Role: CHIEF MEDICAL OFFICER
Signature: /s/ Michelle Gilson, as Attorney-in-Fact
Stock symbol: ACLX
Transactions as of: Feb 7, 2024
Transactions value $: $0
Form type: 4
Date filed: 2/9/2024, 04:08 PM
Previous filing: Jan 8, 2024
Next filing: Feb 12, 2024

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ACLX	Common Stock	Options Exercise	$0	+22.6K	+126.29%	$0.00	40.4K	Feb 7, 2024	Direct	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	ACLX	Restricted Stock Unit	Options Exercise	$0	-22.6K	-50%	$0.00	22.6K	Feb 7, 2024	Common Stock	22.6K		Direct	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.
F2	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 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 February 7, 2022.

Content

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

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 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 February 7, 2022.