Initial Statement of Beneficial Ownership

This filing reports an initial statement of beneficial ownership for Michael Ewing Purves, a director at Bain Capital GSS Investment Corp. (BCSS). Purves acquired 30,000 Class B ordinary shares for $65.22. These shares have no expiration date and will convert to Class A ordinary shares on a one-for-one basis during the company's initial business combination, subject to anti-dilution adjustments. The filing details the ownership nature as direct and specifies the underlying security as Class A ordinary shares.