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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
1789632	Christopher Heery	C/O Arcellx, Inc. 800 Bridge Parkway Redwood City CA 94065	Chief Medical Officer	No	No	No	No

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	2024-07-11	3,671	$6.28	12,949	No	4	M	Direct
Common Stock	Disposition	2024-07-11	3,671	$60.01	9,278	No	4	S	Direct
Common Stock	Acquisiton	2024-07-12	1,780	$6.28	11,058	No	4	M	Direct
Common Stock	Disposition	2024-07-12	1,780	$60.21	9,278	No	4	S	Direct

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

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Stock Option (right to buy)	Disposition	2024-07-11	3,671	$0.00	3,671	$6.28
Common Stock	Stock Option (right to buy)	Disposition	2024-07-12	1,780	$0.00	1,780	$6.28

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
76,502		2031-06-09	No	4	M	Direct
74,722		2031-06-09	No	4	M	Direct

Footnotes

The sale of shares reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan entered into by the Reporting Person on December 22, 2023.
Represents the weighted average share price of an aggregate total of 3,671shares sold in the price range of $60.00 to $60.20 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 1,780 shares sold in the price range of $60.00 to $60.65 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.
Shares issued pursuant to the Issuer's 2017 Equity Incentive Plan (the "2017 Plan"). Subject to the Reporting Person continuing to be a Service Provider (as defined in the 2017 Plan) through each applicable date, twenty-five percent (25%) of the shares subject to the option shall vest on the one (1) year anniversary of the Vesting Commencement Date, and one forty-eighth (1/48th) of the shares subject to the option shall vest each month thereafter 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 April 26, 2021.