Michelle Gilson - 23 May 2023 Form 4 Insider Report for Arcellx, Inc. (ACLX)

Role: Chief Financial Officer
Signature: /s/ Michelle Gilson
Issuer symbol: ACLX
Transactions as of: 23 May 2023
Net transactions value: -$626,151
Form type: 4
Filing time: 25 May 2023, 20:21:21 UTC
Previous filing: 05 Jan 2023
Next filing: 04 Jan 2024
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ACLX	Common Stock	Options Exercise	$0	+22,428	+1274%	$0.000000	24,189	23 May 2023	Direct	F1, F2
transaction	ACLX	Common Stock	Sale	$363,288	-8,554	-35%	$42.47	15,635	24 May 2023	Direct	F3
transaction	ACLX	Common Stock	Sale	$6,246	-150	-0.96%	$41.64	15,485	24 May 2023	Direct	F3
transaction	ACLX	Common Stock	Sale	$256,616	-6,000	-39%	$42.77	9,485	25 May 2023	Direct	F4

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 Units	Options Exercise	$0	-22,428	-33%	$0.000000	44,857	23 May 2023	Common Stock	22,428		Direct	F1, F5

* 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	Includes 1,761 shares of Common Stock acquired under the Issuer's 2022 Employee Stock Purchase Plan on May 12, 2023.
F3	Represents the number of shares sold to cover the tax withholding obligations in connection with the vesting of RSUs and does not represent a discretionary sale by the Reporting Person.
F4	Represents the weighted average share price of an aggregate total of 6,000 shares sold in the price range of $42.73 to $42.8605 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.
F5	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, the RSUs shall vest annually over three (3) years with a cliff every twelve (12) months on the same day of the month as the Vesting Commencement Date (and if there is no corresponding day, on the last day of the month). "Vesting Commencement Date" shall mean May 23, 2022.