Adage Capital Management, L.P. - 31 Dec 2025 SCHEDULE 13G Report for Bain Capital GSS Investment Corp. Class A Ordinary Shares, $0.0001 par value (BCSS)

Filing Manager
Adage Capital Management, L.P.
Reporting Manager
Adage Capital Management, L.P.
Security
Bain Capital GSS Investment Corp. Class A Ordinary Shares, $0.0001 par value
Symbol
BCSS
Shares outstanding
46,875,000 shares
Disclosed Ownership
3,000,000 shares
Ownership
6.4%
Form type
SCHEDULE 13G
Filing time
12 Feb 2026, 09:01:44 UTC
Date of event
31 Dec 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. 6.4% 3,000,000 0 3,000,000 /s/ Robert Atchinson By: Adage Capital Partners LLC, its General Partner, By: Robert Atchinson, its Managing Member
Robert Atchinson 6.4% 3,000,000 0 3,000,000 /s/ Robert Atchinson Robert Atchinson, individually
Phillip Gross 6.4% 3,000,000 0 3,000,000 /s/ Phillip Gross Phillip Gross, individually