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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1786205	Arcellx Inc.	ACLX	Biological Products, (No Disgnostic Substances) (2836)	472855917

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1930862	Michelle Gilson	C/O Arcellx, Inc. 800 Bridge Parkway Redwood City CA 94065	Chief Financial Officer	No	No	No	No

Transaction Summary

Sold:	12,235 shares	Avg. Price: $64.14	Total Value: $784,776.57
Number of Shares After Transactions:	19,776 shares

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Stock	Acquisiton	2025-05-23	22,429	$0.00	32,011	No	4	M	Direct
Common Stock	Disposition	2025-05-27	3,786	$63.62	28,225	No	4	S	Direct
Common Stock	Disposition	2025-05-27	8,449	$64.38	19,776	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	S	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Restricted Stock Units	Disposition	2025-05-23	22,429	$0.00	22,429	$0.00

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0			No	4	M	Direct

Footnotes

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.
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.
Represents the weighted average share price of an aggregate total of 3,786 shares sold in the price range of $62.935 to $63.925 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.
Represents the weighted average share price of an aggregate total of 8,449 shares sold in the price range of $63.925 to $ 64.785 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.
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.