0001962918-23-000025.txt : 20230818 0001962918-23-000025.hdr.sgml : 20230818 20230818185526 ACCESSION NUMBER: 0001962918-23-000025 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20230816 FILED AS OF DATE: 20230818 DATE AS OF CHANGE: 20230818 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Oyston Ronald CENTRAL INDEX KEY: 0001973851 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-41696 FILM NUMBER: 231186985 MAIL ADDRESS: STREET 1: C/O ACELYRIN, INC. STREET 2: 4149 LIBERTY CANYON ROAD CITY: AGOURA HILLS STATE: CA ZIP: 91301 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: ACELYRIN, Inc. CENTRAL INDEX KEY: 0001962918 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] IRS NUMBER: 852406735 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 4149 LIBERTY CANYON RD. CITY: AGOURA HILLS STATE: CA ZIP: 91301 BUSINESS PHONE: 805-871-4300 MAIL ADDRESS: STREET 1: 4149 LIBERTY CANYON RD. CITY: AGOURA HILLS STATE: CA ZIP: 91301 4 1 wk-form4_1692399305.xml FORM 4 X0508 4 2023-08-16 0 0001962918 ACELYRIN, Inc. SLRN 0001973851 Oyston Ronald C/O ACELYRIN, INC. 4149 LIBERTY CANYON RD. AGOURA HILLS CA 91301 0 1 0 0 Chief People Officer 0 Common Stock 2023-08-16 4 A 0 140332 0 A 141332 D Common Stock 26 I See footnote 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. The shares are held of record by the Reporting Person's child. /s/ Mina Kim, Attorney-in-fact 2023-08-18