Madison Avenue Partners, LP - 29 Apr 2025 SCHEDULE 13D Report for ACELYRIN, Inc. Common Stock (SLRN)

Filing Manager
Madison Avenue Partners, LP
Reporting Manager
Madison Avenue Partners, LP
Security
ACELYRIN, Inc. Common Stock
Symbol
SLRN
Shares outstanding
99.8M shares
Disclosed Ownership
5.09M shares
Ownership
5.1%
Form type
SCHEDULE 13D
Filing time
30 Apr 2025, 20:27:15 UTC
Date of event
29 Apr 2025
SEC
View on sec.gov

Reporting Managers (6)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
Madison Avenue International LP 5.1% 5.09M 0 5.09M /s/ Eli Samaha Eli Samaha, as Manager of Madison Avenue GP, LLC, the General Partner of Madison Avenue International LP
Madison Avenue Partners, LP 5.1% 5.09M 0 5.09M /s/ Eli Samaha Eli Samaha, as Managing Member of EMAI Management, LLC, the General Partner of Madison Avenue Partners, LP 0001801265
EMAI Management, LLC 5.1% 5.09M 0 5.09M /s/ Eli Samaha Eli Samaha, as Manager
Madison Avenue GP, LLC 5.1% 5.09M 0 5.09M /s/ Eli Samaha Eli Samaha, as Member
Caraway Jackson Investments LLC 5.1% 5.09M 0 5.09M /s/ Eli Samaha Eli Samaha, as Member
Eli Samaha 5.1% 5.09M 0 5.09M /s/ Eli Samaha Eli Samaha 0001877589