Henry O. Gosebruch - 04 May 2023 Form 3 Insider Report for ACELYRIN, Inc. (SLRN)

Role: Director
Signature: /s/ Mina Kim, Attorney-in-fact
Issuer symbol: SLRN
Transactions as of: 04 May 2023
Transactions value $: $0
Form type: 3
Filing time: 04 May 2023, 19:46:18 UTC
Previous filing: 31 May 2022
Next filing: 11 May 2023
SEC: View on sec.gov

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
holding	SLRN	Director Stock Option (right to buy)							04 May 2023	Class A Common Stock	155K	$7.43	Direct	F1, F2

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

Explanation of Responses:

Id	Content
F1	1/48 of the shares subject to the option vested on April 17, 2023 and 1/48 of the shares subject to the option vests in equal monthly installments thereafter, subject to the Reporting Person's continued service.
F2	Each share of Class A Common Stock shall be reclassified into one share of Common Stock immediately prior to the completion of the Issuer's initial public offering of Common Stock.

Remarks:

Exhibit 24 - Power of Attorney