Adage Capital Management, L.P. - 30 Jun 2025 SCHEDULE 13G/A Report for Cabaletta Bio, Inc. Common Stock, par value $0.00001 per share (CABA)

Filing Manager
Adage Capital Management, L.P.
Reporting Manager
Adage Capital Management, L.P.
Security
Cabaletta Bio, Inc. Common Stock, par value $0.00001 per share
Symbol
CABA
Shares outstanding
90,115,916 shares
Disclosed Ownership
9,002,580 shares
Ownership
10%
Form type
SCHEDULE 13G/A
Filing time
12 Aug 2025, 09:04:13 UTC
Date of event
30 Jun 2025
SEC
View on sec.gov

Reporting Managers (3)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
Adage Capital Management, L.P. 10% 9,002,580 0 9,002,580 /s/ Robert Atchinson By: Adage Capital Partners LLC, its General Partner, By: Robert Atchinson, its Managing Member
Robert Atchinson 10% 9,002,580 0 9,002,580 /s/ Robert Atchinson Robert Atchinson, individually
Phillip Gross 10% 9,002,580 0 9,002,580 /s/ Phillip Gross Phillip Gross, individually