0001209191-23-027522.txt : 20230504 0001209191-23-027522.hdr.sgml : 20230504 20230504200930 ACCESSION NUMBER: 0001209191-23-027522 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20230504 FILED AS OF DATE: 20230504 DATE AS OF CHANGE: 20230504 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: 23890714 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 doc4.xml FORM 4 SUBMISSION X0407 4 2023-05-04 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 Employee Stock Option (right to buy) 18.00 2023-05-04 4 A 0 131714 0.00 A 2033-05-03 Class A Common 131714 131714 D 1/4 of the shares subject to the option vest on May 4, 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. 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. /s/ Mina Kim, Attorney-in-fact 2023-05-04