0001963745-24-000012.txt : 20240320 0001963745-24-000012.hdr.sgml : 20240320 20240320171518 ACCESSION NUMBER: 0001963745-24-000012 CONFORMED SUBMISSION TYPE: 144 PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20240320 DATE AS OF CHANGE: 20240320 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: ACELYRIN, Inc. CENTRAL INDEX KEY: 0001962918 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] ORGANIZATION NAME: 03 Life Sciences IRS NUMBER: 852406735 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 144 SEC ACT: 1933 Act SEC FILE NUMBER: 001-41696 FILM NUMBER: 24768574 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 REPORTING-OWNER: COMPANY DATA: COMPANY CONFORMED NAME: Peloso Paul CENTRAL INDEX KEY: 0001973848 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 144 MAIL ADDRESS: STREET 1: C/O ACELYRIN, INC. STREET 2: 4149 LIBERTY CANYON ROAD CITY: AGOURA HILLS STATE: CA ZIP: 91301 144 1 primary_doc.xml 144 0001973848 XXXXXXXX LIVE 0001962918 ACELYRIN, INC. 001-41696 4149 Liberty Canyon Road Agoura Hills CA 91301 805-730-0360 Peloso Paul Former Affiliate Common Morgan Stanley Smith Barney LLC

1 New York Plaza 8th Floor New York NY 10004

56129 470361.00 97339494 03/20/2024 NASDAQ Common 03/20/2024 Cashless Exercise of Employee Stock Options under an S-8 Registered Plan Issuer N 56129 03/20/2024 Cash Y This Form 144 is being filed for the cashless exercise of options and subsequent sales of the underlying shares commencing on 03/20/2024. 03/20/2024 /s/ Paul Peloso