Bain Capital GSS Investment Sponsor LLC - 01 Oct 2025 SCHEDULE 13G Report for Bain Capital GSS Investment Corp. Class A Ordinary Shares, $0.0001 par value (BCSS)

Filing Manager: Bain Capital GSS Investment Sponsor LLC
Reporting Manager: Bain Capital GSS Investment Sponsor LLC
Security: Bain Capital GSS Investment Corp. Class A Ordinary Shares, $0.0001 par value
Symbol: BCSS
Shares outstanding: 58,404,155 shares
Disclosed Ownership: 12,370,000 shares
Ownership: 21%
Form type: SCHEDULE 13G
Filing time: 15 Oct 2025, 16:10:02 UTC
Date of event: 01 Oct 2025
SEC: View on sec.gov

Reporting Managers (1)

Name	Ownership	Shares Owned	sole voting power	shared voting power	Signature	Title	CIK
Bain Capital GSS Investment Sponsor LLC	21%	12,370,000	12,370,000	0	/s/ Angelo Rufino	Authorized Signatory