Gil M. Labrucherie - 31 Aug 2024 Form 4 Insider Report for ACELYRIN, Inc. (SLRN)

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	SLRN	Employee Stock Option (right to buy)	Award	$0	+150,000		$0.000000	150,000	31 Aug 2024	Common Stock	150,000	$4.78	Direct	F1

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

Id	Content
F1	1/4 of the shares subject to the option vest on August 31, 2025, and 1/48 of the shares subject to the option vest in equal monthly installments thereafter, subject to the Reporting Person's continued service.