Jill Carroll - May 31, 2023 Form 4 Insider Report for Arcellx, Inc. (ACLX)

Role: Director
Signature: /s/ Sasha Keough, attorney-in-fact for Jill Carroll
Stock symbol: ACLX
Transactions as of: May 31, 2023
Transactions value $: -$14,212,623
Form type: 4
Date filed: 6/2/2023, 04:56 PM
Previous filing: May 15, 2023
Next filing: Jun 16, 2023

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ACLX	Common Stock	Sale	-$13.1M	-315K	-11.14%	$41.50	2.51M	May 31, 2023	See Note 1	F1
transaction	ACLX	Common Stock	Sale	-$1.13M	-25.6K	-1.02%	$44.35	2.49M	Jun 1, 2023	See Note 1	F1, F2

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

Explanation of Responses:

Id	Content
F1	The securities are directly held by SR One Capital Fund I Aggregator, LP ("SR One Fund I Aggregator"). SR One Capital Partners I, LP ("SR One Partners I") serves as the general partner of SR One Fund I Aggregator and SR One Capital Management, LLC serves as the general partner of SR One Partners I. The Reporting Person is a partner of SR One Capital Management, LP, an entity affiliated with SR One Fund I Aggregator, and a limited partner of SR One Partners I. The Reporting Person disclaims beneficial ownership of these securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended ("Section 16"), except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for Section 16 or any other purpose.
F2	The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $44.25 to $44.675 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Content

The securities are directly held by SR One Capital Fund I Aggregator, LP ("SR One Fund I Aggregator"). SR One Capital Partners I, LP ("SR One Partners I") serves as the general partner of SR One Fund I Aggregator and SR One Capital Management, LLC serves as the general partner of SR One Partners I. The Reporting Person is a partner of SR One Capital Management, LP, an entity affiliated with SR One Fund I Aggregator, and a limited partner of SR One Partners I. The Reporting Person disclaims beneficial ownership of these securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended ("Section 16"), except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for Section 16 or any other purpose.

The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $44.25 to $44.675 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.