Gil M. Labrucherie - 17 Aug 2023 Form 4 Insider Report for ACELYRIN, Inc. (SLRN)

Role: Chief Financial Officer
Signature: /s/ Mina Kim, Attorney-in-fact
Issuer symbol: SLRN
Transactions as of: 17 Aug 2023
Net transactions value: $0
Form type: 4
Filing time: 21 Aug 2023, 16:48:44 UTC
Previous filing: 03 Aug 2023
Next filing: 06 Oct 2023
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
holding	SLRN	Common Stock						6,250	17 Aug 2023	Direct

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	+254,939		$0.000000	254,939	17 Aug 2023	Common Stock	254,939	$26.94	Direct	F1

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

Explanation of Responses:

Id	Content
F1	1/4 of the shares subject to the option vest on August 17, 2024, and 1/48 of the shares subject to the option vest in equal monthly installments thereafter, subject to the Reporting Person's continued service through each vesting date.