Q - Bain Capital Specialty Finance,

Evaluation of Disclosure Controls and Procedures

As of June 30, 2025 (the end of the period covered by this report), our management has carried out an evaluation, under the supervision of and with the participation of our Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and operation of our disclosure controls and procedures (as defined in Rule 13a‑15 and 15d‑15(e) under the Exchange Act). Based on that evaluation our Chief Executive Officer and Chief Financial Officer have concluded that our current disclosure controls and procedures are effective to provide reasonable assurance that information required to be disclosed by us in the reports we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, and that such information is accumulated and communicated to our Chief Executive Officer and Chief Financial Officer as appropriate to allow timely decisions regarding required disclosure. In designing and evaluating our disclosure controls and procedures, management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving their objectives, and management necessarily applies its judgment in evaluating the benefits of possible controls and procedures relative to their costs.

Changes in Internal Controls Over Financial Reporting

There have been no changes in our internal control over financial reporting, as defined in Rules 13a‑15(f) and 15d‑15(f) under the Exchange Act, that occurred during our most recently completed fiscal quarter ended June 30, 2025 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.