Michael E. Purves - 18 Dec 2025 Form 3 Insider Report for Bain Capital GSS Investment Corp. (BCSS)

Role: Director
Signature: /s/ Michael E. Purves
Issuer symbol: BCSS
Transactions as of: 18 Dec 2025
Net transactions value: $0
Form type: 3
Filing time: 22 Dec 2025, 18:55:25 UTC
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Purves Michael Ewing	Director	200 CLARENDON STREET, BOSTON	/s/ Michael E. Purves	22 Dec 2025	0002102546

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
holding	BCSS	Class B ordinary shares, par value $0.0001 per share							18 Dec 2025	Class A ordinary shares, par value $0.0001 per share	30,000		Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Pursuant to the Issuer's amended and restated memorandum and articles of association, the Class B ordinary shares have no expiration date and will automatically convert into Class A ordinary shares at the time of the Issuer's initial business combination on a one-for-one basis subject to adjustment pursuant to certain anti-dilution rights. The reporting person purchased 30,000 Class B ordinary shares for the aggregate consideration of $65.22.

Content

Pursuant to the Issuer's amended and restated memorandum and articles of association, the Class B ordinary shares have no expiration date and will automatically convert into Class A ordinary shares at the time of the Issuer's initial business combination on a one-for-one basis subject to adjustment pursuant to certain anti-dilution rights. The reporting person purchased 30,000 Class B ordinary shares for the aggregate consideration of $65.22.