Bain Capital Specialty Finance, Inc.

For the period ended Sep 30, 2026. Filed Nov 9, 2026.

About this filing

A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Sep 30, 2026 · Filed Nov 9, 2026

BCSF$10.97-1.5%Stored close · as of Nov 9, 2026

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Contents

Cover page

Item 1. Consolidated Financial Statements

Consolidated Statements of Assets and Liabilities as of September 30, 2026 (unaudited) and December 31, 2025 Consolidated Statements of Operations for the three and nine months ended September 30, 2026 and 2025 (unaudited)Consolidated Statements of Cash Flows for the nine months ended September 30, 2026 and 2025 (unaudited)Consolidated Schedules of Investments as of September 30, 2026 (unaudited) and December 31, 2025 Notes to Consolidated Financial Statements (unaudited)

Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations (no text here)

Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

Item 3. Quantitative and Qualitative Disclosures About Market Risk (no text here)

Item 3. Quantitative and Qualitative Disclosures About Market Risk

Item 4. Controls and Procedures (no text here)

Item 4. Controls and Procedures

Item 1. Legal Proceedings (no text here)

Item 1. Legal Proceedings

Item 1A. Risk Factors (no text here)

Item 1A. Risk Factors

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds (no text here)

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

Item 3. Default Upon Senior Securities (no text here)

Item 3. Defaults Upon Senior Securities

Item 4. Mine Safety Disclosures (no text here)

Item 4. Mine Safety Disclosures

Item 5. Other Information (no text here)

Item 5. Other Information

Rule 10b5-1 Trading Plans

Item 6. Exhibits (no text here)

Item 6. Exhibits Signatures

Item 6. Exhibits

ExhibitNumber	Description of Document
3.1	Amended and Restated Certificate of Incorporation (incorporated by reference to Exhibit 3.1 to the Company’s Registration Statement on Form 10 (File No. 000‑55528) filed on October 6, 2016).
3.2*	Amended and Restated Bylaws.
10.1	Fourth Amendment to Senior Secured Revolving Credit Agreement, dated July 28, 2026 by and among Bain Capital Specialty Finance, Inc., as borrower, Sumitomo Mitsui Banking Corporation, as administrative agent and as collateral agent, the lenders and issuing banks party thereto and, solely with respect to Section 6.9 therein, the subsidiary guarantors party thereto (incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K, filed on July 31, 2026).
31.1*	Certification of Chief Executive Officer pursuant to Rule 13a‑14 under the Securities Exchange Act of 1934, as amended, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, as amended.
31.2*	Certification of Chief Financial Officer pursuant to Rule 13a‑14 under the Securities Exchange Act of 1934, as amended, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, as amended.
32*	Certification pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, as amended.
101.INS*	XBRL Instance Document.
101.SCH*	Inline XBRL Taxonomy Extension Schema Document.
101.CAL*	Inline XBRL Taxonomy Extension Calculation Linkbase Document.
101.DEF*	Inline XBRL Taxonomy Extension Calculation Linkbase Document.
101.LAB*	Inline XBRL Taxonomy Extension Label Linkbase Document.
101.PRE*	Inline XBRL Taxonomy Extension Presentation Linkbase Document.
104	Cover Page Interactive Data File - The cover page interactive data file does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.

Filed herewith.

ContentsView on SEC.gov

The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.