Shao-Lee Lin - Aug 16, 2023 Form 4 Insider Report for ACELYRIN, Inc. (SLRN)

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	SLRN	Common Stock	Award	$0	+842K	+109.4%	$0.00	1.61M	Aug 16, 2023	Direct	F1
holding	SLRN	Common Stock						1.16M	Aug 16, 2023	See footnote	F2
holding	SLRN	Common Stock						678K	Aug 16, 2023	See footnote	F3
holding	SLRN	Common Stock						355K	Aug 16, 2023	See footnote	F4
holding	SLRN	Common Stock						355K	Aug 16, 2023	See footnote	F5
holding	SLRN	Common Stock						350K	Aug 16, 2023	See footnote	F6
holding	SLRN	Common Stock						5.07K	Aug 16, 2023	See footnote	F7

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

Id	Content
F1	Represents Restricted Stock Units (RSUs). 1/4 of the RSUs will vest on May 15, 2024 and the remaining RSUs will vest in three equal annual installments thereafter, subject to the Reporting Person's continued service through each vesting date.
F2	Shares held directly by Woodland Hills Partners LLC, for which the Reporting Person serves as a managing member.
F3	Shares held directly by Shao-Lee Lin, Trustee of the Shao-Lee Lin Trust u/a/d September 23, 2005, for which the Reporting Person serves as trustee.
F4	Shares held directly by Shao-Lee Lin 2020 Gift Trust Dtd 7/16/20, for which the Reporting Person's spouse serves as trustee.
F5	Shares held directly by Lin Family 2020 Gift Trust Dtd 7/16/20, for which the Reporting Person's spouse shares voting and investment power.
F6	Shares held directly by Susie Jun 2020 Gift Trust dtd 7/16/20, for which the Reporting Person serves as trustee.
F7	Shares held directly by Susie Jun, Trustee of the Susie Jun Trust U/A/D September 23, 2005, for which the Reporting Person's spouse serves as trustee.