BCSF / Bain Capital Specialty Finance, Inc. - Pengajuan SECLaporan Tahunan, Pernyataan Proksi

Bain Capital Specialty Finance, Inc.
US ˙ NYSE ˙ US05684B1070

Mga Batayang Estadistika
LEI 549300V2JL72R0EYBK64
CIK 1655050
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to Bain Capital Specialty Finance, Inc.
SEC Filings (Chronological Order)
Halaman ini menyediakan daftar lengkap dan kronologis dari Pengajuan SEC, tidak termasuk pengajuan kepemilikan yang kami sediakan di tempat lain.
August 5, 2025 10-Q

Note 1. Organization Note 2. Summary of Significant Accounting Policies Note 3. Investments Note 4. Fair Value Measurements Note 5. Related Party Transactions Note 6. Debt Note 7. Derivatives Note 8. Distributions Note 9. Common Stock/Capital Note 1

n UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 814-01175 BAIN CAP

August 5, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 5, 2025 BAIN CAPITAL SPECI

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 5, 2025 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) Delaware 814-01175 81-2878769 (State or Other Jurisdiction of Incorporation)

August 5, 2025 EX-99.1

Bain Capital Specialty Finance, Inc. Consolidated Statements of Assets and Liabilities (in thousands, except share and per share data) As of As of June 30, 2025 December 31, 2024 (Unaudited) Assets Investments at fair value: Non-controlled/non-affili

EX-99.1 Exhibit 99.1 Bain Capital Specialty Finance, Inc. Announces June 30, 2025 Financial Results and Declares Third Quarter 2025 Dividend of $0.42 per Share BOSTON – August 5, 2025 – Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the “Company”, “our” or “we”) today announced financial results for the second quarter ended June 30, 2025, and that its Board of Directors (the “Board”) has declar

July 22, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 22, 2025 BAIN CAPITAL SPECIA

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 22, 2025 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) Delaware 814-01175 81-2878769 (State or Other Jurisdiction of Incorporation)

July 22, 2025 EX-99.1

Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the Second Quarter Ended June 30, 2025

EX-99.1 Exhibit 99.1 Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the Second Quarter Ended June 30, 2025 BOSTON – July 22, 2025 – Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the “Company”) today announced it will report its financial results for the second quarter ended June 30, 2025 on Tuesday, August 5, 2025 after market close. Management will host a conference call

July 16, 2025 8-K

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 15, 2025 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) Delaware 814-01175 81-2878769 (State or Other Jurisdiction of Incorporation)

July 7, 2025 EX-10.1

Second Amended and Restated Indenture, dated as of July 2, 2025, by and among BCC Middle Market CLO 2019-1, Ltd., as issuer, BCC Middle Market CLO 2019-1 Co-Issuer, LLC, as co-issuer, and Wells Fargo Bank, National Association, as trustee.

Exhibit 10.1 EXECUTION VERSION BCC MIDDLE MARKET CLO 2019-1, LTD., Issuer BCC MIDDLE MARKET CLO 2019-1 CO-ISSUER, LLC, Co-Issuer AND WELLS FARGO BANK, NATIONAL ASSOCIATION Trustee SECOND AMENDED AND RESTATED INDENTURE Dated as of July 2, 2025 TABLE OF CONTENTS Page ARTICLE I DEFINITIONS 9 Section 1.1. Definitions 9 Section 1.2. Assumptions as to Pledged Obligations 9 ARTICLE II THE NOTES 13 Sectio

July 7, 2025 EX-10.2

Second Amended and Restated Portfolio Management Agreement, dated as of July 2, 2025, by and between BCC Middle Market CLO 2019-1, Ltd., as issuer, and Bain Capital Specialty Finance, Inc., as portfolio manager.

Exhibit 10.2 EXECUTION VERSION SECOND AMENDED AND RESTATED PORTFOLIO MANAGEMENT AGREEMENT This Second Amended and Restated Portfolio Management Agreement (this “Agreement”), dated as of July 2, 2025, is entered into by and between BCC MIDDLE MARKET CLO 2019-1, Ltd., a private company incorporated with limited liability under the laws of Jersey, as issuer (together with successors and assigns permi

July 7, 2025 8-K

Entry into a Material Definitive Agreement, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 30, 2025 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) Delaware 814-01175 81-2878769 (State or Other Jurisdiction of Incorporation)

July 7, 2025 8-K

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 30, 2025 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) Delaware 814-01175 81-2878769 (State or Other Jurisdiction of Incorporation)

June 26, 2025 EX-99.(N)(1)

Consent of Independent Registered Public Accounting Firm (filed herewith).

Exhibit (n)(1) CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We hereby consent to the incorporation by reference in this Registration Statement on Form N-2 of Bain Capital Specialty Finance, Inc.

June 26, 2025 EX-99.(N)(3)

Powers of Attorney (filed herewith).

Exhibit (n)(3) Power of Attorney I, Michael J. Boyle, of 200 Clarendon Street, Boston, MA 02116, hereby appoint Amit Joshi, Michael Ewald, Jeffrey Hawkins, James Goldman and Adriana Rojas Garzón as my recognized representatives and true and lawful attorneys-in-fact to sign any and all registration statements of Bain Capital Specialty Finance, Inc. (the “Company”), and any amendments or supplements

June 26, 2025 EX-99.(D)(2)

Form T-1 Statement of Eligibility of U.S. Bank National Association, as trustee, with respect to the Form of Indenture (filed herewith).

Exhibit d.2 SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM T-1 STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE ☐ Check if an Application to Determine Eligibility of a Trustee Pursuant to Section 305(b)(2) U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION (Exact name of Trustee as specified in its charter) 91-1821036 I.R.S. Em

June 26, 2025 N-2ASR

As filed with the Securities and Exchange Commission on June 26, 2025 Securities Act Registration No. 333-     UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-2 Registration Statement under the Securities Act of 1933 ☒

As filed with the Securities and Exchange Commission on June 26, 2025 Securities Act Registration No.

June 26, 2025 EX-FILING FEES

Filing Fee Table (filed herewith).

Calculation of Filing Fee Tables N-2 Bain Capital Specialty Finance, Inc. Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Carry Forward Form Type Carry Forward File Number Carry Forward Initia

June 26, 2025 EX-99.(L)

Opinion and Consent of Dechert LLP (filed herewith).

Exhibit (l) Three Bryant Park 1095 Avenue of the Americas New York, NY 10036-6797 +1 212 698 3500 Main +1 212 698 3599 Fax www.

June 16, 2025 8-K

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 12, 2025 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) Delaware 814-01175 81-2878769 (State or Other Jurisdiction of Incorporation)

May 22, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 22, 2025 BAIN CAPITAL SPECIAL

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 22, 2025 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) Delaware 814-01175 81-2878769 (State or Other Jurisdiction of Incorporation) (

May 5, 2025 EX-99.1

Bain Capital Specialty Finance, Inc. Consolidated Statements of Assets and Liabilities (in thousands, except share and per share data) As of As of March 31, 2025 December 31, 2024 (Unaudited) Assets Investments at fair value: Non-controlled/non-affil

EX-99.1 Exhibit 99.1 Bain Capital Specialty Finance, Inc. Announces March 31, 2025 Financial Results and Declares Second Quarter 2025 Dividend of $0.42 per Share BOSTON – May 5, 2025 – Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the “Company”, “our” or “we”) today announced financial results for the first quarter ended March 31, 2025, and that its Board of Directors (the “Board”) has declare

May 5, 2025 10-Q

Note 1. Organization Note 2. Summary of Significant Accounting Policies Note 3. Investments Note 4. Fair Value Measurements Note 5. Related Party Transactions Note 6. Debt Note 7. Derivatives Note 8. Distributions Note 9. Common Stock/Capital Note 1

n UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 814-01175 BAIN CA

May 5, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 5, 2025 BAIN CAPITAL SPECIALT

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 5, 2025 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) Delaware 814-01175 81-2878769 (State or Other Jurisdiction of Incorporation) (C

May 2, 2025 8-K

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): April 28, 2025 BAIN CAPITAL SPECIALTY FINANCE, INC.

May 2, 2025 EX-10.1

Custody Agreement, dated April 28, 2025, by and between Bain Capital Specialty Finance, Inc. and U.S. Bank Trust Company

Exhibit 10.1 EXECUTION COPY CUSTODY AGREEMENT dated as of April 28, 2025 by and between BAIN CAPITAL SPECIALTY FINANCE, INC. (“Company”) and U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION (“Custodian”) TABLE OF CONTENTS Page 1. DEFINITIONS 1 2. APPOINTMENT OF CUSTODIAN 7 3. DUTIES OF CUSTODIAN 8 4. REPORTING 17 5. DEPOSIT IN U.S. SECURITIES SYSTEMS 17 6. SECURITIES HELD OUTSIDE OF THE UNITED STATES

May 2, 2025 EX-10.2

Document Custody Agreement, dated April 28, 2025, by and between Bain Capital Specialty Finance, Inc. and U.S. Bank Trust Company

Exhibit 10.2 Execution Copy DOCUMENT CUSTODY AGREEMENT BAIN CAPITAL SPECIALTY FINANCE, INC. “Company” and U.S. BANK NATIONAL ASSOCIATION “Document Custodian” Dated as of April 28, 2025 TABLE OF CONTENTS Section 1. Certain Definitions 1 Section 2. Appointment of the Document Custodian 5 Section 3. Delivery of Loan Files 5 Section 4. Release of Loan Files 6 Section 5. Further Obligations of the Docu

April 30, 2025 8-K

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): April 28, 2025 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) DELAWARE 814-01175 81-2878769 (State or Other Jurisdiction of Incorporation)

April 21, 2025 EX-99.1

Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the First Quarter Ended March 31, 2025

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the First Quarter Ended March 31, 2025 BOSTON – April 21, 2025– Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the “Company”) today announced it will report its financial results for the first quarter ended March 31, 2025 on Monday, May 5, 2025 after market close. Management will host a conference call on Tuesday,

April 21, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 21, 2025 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) Delaware 814-01175 81-2878769 (State or Other Jurisdiction of Incorporation)

April 21, 2025 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Defin

March 20, 2025 PRE 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

PRE 14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☒ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

March 4, 2025 EX-1.1

Form of Equity Distribution Agreement (incorporated by reference to Exhibit 1.1 to the Company’s Current Report on Form 8-K (File No. 814-01175), filed on March 4, 2025).

Exhibit 1.1 Bain Capital Specialty Finance, Inc. (a Delaware Corporation) Up to $250,000,000 Common Stock EQUITY DISTRIBUTION AGREEMENT [•], 2025 [•] Ladies and Gentlemen: Bain Capital Specialty Finance, Inc., a Delaware Corporation (the “Company”) and BCSF Advisors, LP, a Delaware limited partnership registered as an investment adviser (the “Adviser”) confirm their agreement (this “Agreement”) wi

March 4, 2025 EX-FILING FEES

$250,000,000 BAIN CAPITAL SPECIALTY FINANCE, INC. Common Stock

Filed Pursuant to Rule 424(b)(3) Registration No.: 333-265951 AMENDMENT NO. 1 DATED MARCH 4, 2025 (To prospectus supplement dated February 27, 2025 and prospectus dated July 1, 2022) $250,000,000 BAIN CAPITAL SPECIALTY FINANCE, INC. Common Stock This Amendment No. 1 to the Prospectus Supplement amends our prospectus supplement dated February 27, 2025. This amendment should be read in conjunction w

March 4, 2025 8-K

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 27, 2025 BAIN CAPITAL SPECIALTY FINANCE, INC.

March 4, 2025 424B3

$250,000,000 BAIN CAPITAL SPECIALTY FINANCE, INC. Common Stock

Filed Pursuant to Rule 424(b)(3) Registration No.: 333-265951 AMENDMENT NO. 1 DATED MARCH 4, 2025 (To prospectus supplement dated February 27, 2025 and prospectus dated July 1, 2022) $250,000,000 BAIN CAPITAL SPECIALTY FINANCE, INC. Common Stock This Amendment No. 1 to the Prospectus Supplement amends our prospectus supplement dated February 27, 2025. This amendment should be read in conjunction w

February 28, 2025 424B2

Filed Pursuant to Rule 424(b)(2) Registration No.: 333-265951 PROSPECTUS SUPPLEMENT (To Prospectus dated July 1, 2022) $250,000,000 BAIN CAPITAL SPECIALTY FINANCE, INC. Common Stock We are an externally managed specialty finance company focused on le

Table of Contents Filed Pursuant to Rule 424(b)(2) Registration No.: 333-265951 PROSPECTUS SUPPLEMENT (To Prospectus dated July 1, 2022) $250,000,000 BAIN CAPITAL SPECIALTY FINANCE, INC. Common Stock We are an externally managed specialty finance company focused on lending to middle market companies that has elected to be regulated as a business development company, or BDC, under the Investment Co

February 28, 2025 8-K

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported):February 27, 2025 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) Delaware 814-01175 81-2878769 (State or Other Jurisdiction of Incorporatio

February 27, 2025 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 814-01175 BAIN CAPITAL S

February 27, 2025 EX-24.1

Powers of Attorney (incorporated by reference to Exhibit 24.1 to the Company’s Annual Report on Form 10-K (File No. 814-01175) filed on February 27, 2025).

Exhibit 24.1 Bain Capital Specialty Finance, Inc. Power of Attorney Reports Under the Securities Exchange Act of 1934 The undersigned director of Bain Capital Specialty Finance, Inc., a Delaware corporation (the “Fund”), hereby constitutes and appoints Amit Joshi, Michael Ewald, Jeffrey Hawkins, Thomas Emery, Sally Dornaus, James Goldman and Jessica Yeager, the undersigned’s true lawful attorneys-

February 27, 2025 EX-21

Subsidiaries of Bain Capital Specialty Finance, Inc.

EXHIBIT 21 SUBSIDIARIES OF BAIN CAPITAL SPECIALTY FINANCE, INC. 1. ADT BCSF Investments, LLC Delaware 2. BCSF ERA Investments, LLC Delaware 3. BCC BCSF DCB Investments, LLC Delaware 4. BCSF Abracon Holding, LLC Delaware 5. BCSF Complete Financing Solution Holdco LLC Delaware 6. BCSF Complete Financing Solution LLC Delaware 7. BCSF Grammer Holdings (E), LLC Delaware 8. BCSF I, LLC Delaware 9. BCSF

February 27, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported):February 27, 2025 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) Delaware 814-01175 81-2878769 (State or Other Jurisdiction of Incorporatio

February 27, 2025 EX-19

Insider Trading Policy

Exhibit 19 Bain Capital Specialty Finance, Inc. Bain Capital private credit Insider Trading Policy General No director, manager, partner, officer or employee of the Company, Bain Capital, LP, Bain Capital Credit, LP, BCSF Advisors, LP (the investment adviser for Bain Capital Specialty Finance, Inc.) or BCPC Advisors, LP (the investment adviser for Bain Capital Private Credit) (each of BCSF Advisor

February 27, 2025 EX-4.2

Description of Securities.

EX-4.2 2 bcsf-ex42.htm EX-4.2 Exhibit 4.2 As of December 31, 2024, Bain Capital Specialty Finance (“we,” “our” or the “Company”) had one of securities registered under Section 12 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”): our common stock, par value $0.001 per share (“common stock”). In this exhibit, references to “we,” “us” and “our” refer only to the Company and not

February 27, 2025 EX-99.1

Bain Capital Specialty Finance, Inc. Consolidated Statements of Assets and Liabilities (in thousands, except share and per share data)

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Announces December 31, 2024 Financial Results and Declares First Quarter 2025 Dividend of $0.42 per Share and Additional Dividends Totaling $0.12 per Share for 2025 BOSTON – February 27, 2025– Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the “Company”, “our” or “we”) today announced financial results for the fourth quarter and fiscal year ende

February 27, 2025 EX-10.38

International Senior Loan Program, LLC Consolidated Financial Statements for year ending December 31, 2024.

Exhibit 10.38 International senior loan program, LLC Consolidated Financial Statements For the years ended December 31, 2024, 2023 and 2022 Report of Independent Auditors To the Members of International Senior Loan Program, LLC Opinion We have audited the accompanying consolidated financial statements of International Senior Loan Program, LLC and its subsidiaries (the “Company”), which comprise th

February 19, 2025 8-K

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 12, 2025 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) DELAWARE 814-01175 81-2878769 (State or Other Jurisdiction of Incorporati

February 6, 2025 8-K

Entry into a Material Definitive Agreement, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 6, 2025 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) DELAWARE 814-01175 81-2878769 (State or Other Jurisdiction of Incorporatio

February 6, 2025 EX-4.2

Third Supplemental Indenture, dated as of February 6, 2025, relating to the 5.950% Notes due 2030, by and between the Company and U.S. Bank Trust Company, National Association, as trustee (incorporated by reference to Exhibit 4.2 to the Company’s Current Report on Form 8-K (File No. 814-01175) filed on February 6, 2025).

Exhibit 4.2 THIRD SUPPLEMENTAL INDENTURE between BAIN CAPITAL SPECIALTY FINANCE, INC. and U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION, as Trustee Dated as of February 6, 2025 THIRD SUPPLEMENTAL INDENTURE THIS THIRD SUPPLEMENTAL INDENTURE (this “Third Supplemental Indenture”), dated as of February 6, 2025, is between Bain Capital Specialty Finance, Inc., a Delaware corporation (the “Company”), an

February 5, 2025 EX-99.1

Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the Fourth Quarter Ended December 31, 2024

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the Fourth Quarter Ended December 31, 2024 BOSTON – February 5, 2025– Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the “Company”) today announced it will report its financial results for the fourth quarter and fiscal year ended December 31, 2024 on Thursday, February 27, 2025 after market close. Management will h

February 5, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 05, 2025 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) Delaware 814-01175 81-2878769 (State or Other Jurisdiction of Incorporati

February 3, 2025 EX-99.1

Bain Capital Specialty Finance, Inc. $350,000,000 Aggregate Principal Amount 5.950% Notes due 2030 UNDERWRITING AGREEMENT

Exhibit 99.1 Execution Version Bain Capital Specialty Finance, Inc. $350,000,000 Aggregate Principal Amount 5.950% Notes due 2030 UNDERWRITING AGREEMENT January 30, 2025 SMBC Nikko Securities America, Inc. 277 Park Avenue, 5th Floor New York, New York 10172 Wells Fargo Securities, LLC 550 South Tryon Street, 5th Floor Charlotte, North Carolina 28202 BNP Paribas Securities Corp. 787 Seventh Avenue

February 3, 2025 8-K

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): January 30, 2025 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) DELAWARE 814-01175 81-2878769 (State or Other Jurisdiction of Incorporatio

February 3, 2025 EX-FILING FEES

Calculation of Filing Fee Tables Form 424B2 (Form Type) BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities and Carry Forward Securities

Exhibit 107 Calculation of Filing Fee Tables Form 424B2 (Form Type) BAIN CAPITAL SPECIALTY FINANCE, INC.

February 3, 2025 424B2

Filed Pursuant to Rule 424(b)(2) Registration No.: 333-265951 PROSPECTUS SUPPLEMENT To the Prospectus dated J u ne 30, 2022 $350,000,000 BAIN CAPITAL SPECIALTY FINANCE, INC. 5.950% Notes du e 2030 We are offering for sale $350,000,000 in aggregate pr

Table of Contents Filed Pursuant to Rule 424(b)(2) Registration No.: 333-265951 PROSPECTUS SUPPLEMENT To the Prospectus dated J u ne 30, 2022 $350,000,000 BAIN CAPITAL SPECIALTY FINANCE, INC. 5.950% Notes du e 2030 We are offering for sale $350,000,000 in aggregate principal amount of 5.950% Notes due 2030, which we refer to as the Notes. The Notes will mature on March 15, 2030. We will pay intere

January 30, 2025 FWP

Bain Capital Specialty Finance, Inc. 5.950% Notes due 2030 PRICING TERM SHEET January 30, 2025

FWP 1 d907293dfwp.htm FWP Filed Pursuant to Rule 433 Issuer Free Writing Prospectus dated January 30, 2025 Relating to Preliminary Prospectus Supplement dated January 30, 2025 Prospectus dated July 1, 2022 Registration No. 333-265951 Bain Capital Specialty Finance, Inc. $350,000,000 5.950% Notes due 2030 PRICING TERM SHEET January 30, 2025 The following sets forth the final terms of the 5.950% Not

January 30, 2025 424B2

SUBJECT TO COMPLETION, DATED JANUARY 30, 2025

Table of Contents Filed Pursuant to Rule 424(b)(2) Registration No.: 333-265951 The information in this preliminary prospectus supplement is not complete and may be changed. An effective registration statement relating to these securities has been filed with the U.S. Securities and Exchange Commission. This preliminary prospectus supplement and the accompanying prospectus are not an offer to sell

November 5, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number: 814-01175 BAIN CAPITAL SPECIALTY FINANCE, INC. (E

November 5, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 05, 2024 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) Delaware 814-01175 81-2878769 (State or Other Jurisdiction of Incorporati

November 5, 2024 EX-99.1

Bain Capital Specialty Finance, Inc. Consolidated Statements of Assets and Liabilities (in thousands, except share and per share data)

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Announces September 30, 2024 Financial Results and Declares Fourth Quarter 2024 Dividend of $0.42 per Share BOSTON – November 5, 2024– Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the “Company”, “our” or “we”) today announced financial results for the third quarter ended September 30, 2024, and that its Board of Directors (the “Board”) has dec

October 21, 2024 EX-99.1

Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the Third Quarter Ended September 30, 2024

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the Third Quarter Ended September 30, 2024 BOSTON – October 21, 2024– Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the “Company”) today announced it will report its financial results for the third quarter ended September 30, 2024 on Tuesday, November 5, 2024 after market close. Management will host a conference c

October 21, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 21, 2024 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) Delaware 814-01175 81-2878769 (State or Other Jurisdiction of Incorporatio

August 6, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 06, 2024 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) Delaware 814-01175 81-2878769 (State or Other Jurisdiction of Incorporation

August 6, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number: 814-01175 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact

August 6, 2024 EX-10.32

Third Amendment dated as of May 20, 2024 to Revolving Credit Agreement, dated as of December 24, 2021, by and among the Company as Borrower, with Sumitomo Mitsui Banking Corporation, as Administrative Agent and Sole Book Runner, and with Sumitomo Mitsui Banking Corporation and MUFG Union Bank, N.A., as Joint Lead Arrangers. (incorporated by reference to Exhibit 10.32 to the Company’s Quarterly Report on Form 10-Q (File No.814-01175) filed on August 6, 2024).

Exhibit 10.32 EXECUTION COPY THIRD AMENDMENT TO SENIOR SECURED REVOLVING CREDIT AGREEMENT AND FIRST AMENDMENT TO GUARANTEE AND SECURITY AGREEMENT THIS THIRD AMENDMENT TO SENIOR SECURED REVOLVING CREDIT AGREEMENT AND FIRST AMENDMENT TO GUARANTEE AND SECURITY AGREEMENT, dated as of May 20, 2024 (this “Amendment”), is among BAIN CAPITAL SPECIALTY FINANCE, INC., a Delaware corporation (the “Borrower”)

August 6, 2024 EX-99.1

Bain Capital Specialty Finance, Inc. Consolidated Statements of Assets and Liabilities (in thousands, except share and per share data)

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Announces June 30, 2024 Financial Results and Declares Third Quarter 2024 Dividend of $0.42 per Share BOSTON – August 6, 2024– Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the “Company”, “our” or “we”) today announced financial results for the second quarter ended June 30, 2024, and that its Board of Directors (the “Board”) has declared a divi

July 11, 2024 EX-99.1

Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the Second Quarter Ended June 30, 2024

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the Second Quarter Ended June 30, 2024 BOSTON – July 11, 2024– Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the “Company”) today announced it will report its financial results for the second quarter ended June 30, 2024 on Tuesday, August 6, 2024 after market close. Management will host a conference call on Wednes

July 11, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 11, 2024 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) Delaware 814-01175 81-2878769 (State or Other Jurisdiction of Incorporation)

June 13, 2024 8-K

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): May 23, 2024 BAIN CAPITAL SPECIALTY FINANCE, INC.

May 22, 2024 8-K

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): May 20, 2024 BAIN CAPITAL SPECIALTY FINANCE, INC.

May 22, 2024 EX-99.1

Bain Capital Specialty Finance, Inc. Increases and Extends Its Revolving Credit Facility

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Increases and Extends Its Revolving Credit Facility BOSTON – May 22, 2024 – Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the “Company”, “our” or “we”) announced today that it has increased commitments under its senior secured revolving credit facility with Sumitomo Mitsui Banking Corporation as administrative agent (the “Sumitomo Credit Facili

May 8, 2024 DEFR14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. 1)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. 1) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defi

May 6, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 06, 2024 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) Delaware 814-01175 81-2878769 (State or Other Jurisdiction of Incorporation) (

May 6, 2024 EX-24.1

Powers of Attorney (incorporated by reference to Exhibit 24.1 to the Company’s Annual Report on Form 10-Q (File No. 814-01175) filed on May 6, 2024).

BUSINESS.31293001.2 Exhibit 24.1 Power of Attorney I, Amy Butte, of 200 Clarendon Street, Boston, MA 02116, hereby appoint Amit Joshi, Michael Ewald, Michael Boyle, Jeffrey Hawkins, Michael Treisman, Sally Dornaus, James Goldman and Jessica Yeager as my recognized representatives and true and lawful attorneys-in-fact to sign any and all registration statements of Bain Capital Specialty Finance, In

May 6, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number: 814-01175 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact

May 6, 2024 EX-99.1

Bain Capital Specialty Finance, Inc. Consolidated Statements of Assets and Liabilities (in thousands, except share and per share data)

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Announces March 31, 2024 Financial Results and Declares Second Quarter 2024 Dividend of $0.42 per Share BOSTON – May 6, 2024 – Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the “Company”, “our” or “we”) today announced financial results for the first quarter ended March 31, 2024, and that its Board of Directors (the “Board”) has declared a divi

April 23, 2024 EX-99.1

Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the First Quarter Ended March 31, 2024

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the First Quarter Ended March 31, 2024 BOSTON – April 23, 2024– Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the “Company”) today announced it will report its financial results for the first quarter ended March 31, 2024 on Monday, May 6, 2024 after market close. Management will host a conference call on Tuesday,

April 23, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 23, 2024 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) Delaware 814-01175 81-2878769 (State or Other Jurisdiction of Incorporation)

April 22, 2024 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Defin

March 20, 2024 PRE 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☒ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defin

February 27, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 27, 2024 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) Delaware 814-01175 81-2878769 (State or Other Jurisdiction of Incorporati

February 27, 2024 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number: 814-01175 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact Name

February 27, 2024 EX-10.36

Second Amendment dated December 14, 2023 to the Amended and Restated Limited Liability Company Agreement, dated February 9, 2021, as amended on September 8, 2021 of International Senior Loan Program, LLC, by and among the Company, Pantheon Private Debt Program SCSp SICAV—RAIF—Pantheon Senior Debt Secondaries II (USD), Pantheon Private Debt Program SCSp SICAV—RAIF—Tubera Credit 2020, Solutio Premium Private Debt I SCSp, Solutio Premium Private Debt II Master SCSp, Pantheon Private Debt Program SICAV—RAIF—Pantheon Senior Debt Secondaries II (EUR) and Pantheon Private Debt Program SICAV—RAIF—Pantheon Senior Debt Secondaries II (GBP) (filed herewith). (incorporated by reference to Exhibit 10.36 to the Company’s Annual Report on Form 10-K (File No. 814-01175) filed on February 27, 2024).

Exhibit 10.36 Execution Version SECOND AMENDMENT TO AMENDED AND RESTATED LIMITED LIABILITY COMPANY AGREEMENT OF INTERNATIONAL SENIOR LOAN PROGRAM, LLC This Second Amendment, made and entered into as of December 13, 2023, by the parties signatory hereto (this “Amendment”), amends that certain Amended and Restated Limited Liability Company Agreement of International Senior Loan Program, LLC, a Delaw

February 27, 2024 EX-10.37

International Senior Loan Program, LLC Consolidated Financial Statements for year ending December 31, 2023. (incorporated by reference to Exhibit 10.37 to the Company’s Annual Report on Form 10-K (File No. 814-01175) filed on February 27, 2024).

Exhibit 10.37 International senior loan program, LLC Consolidated Financial Statements For the years ended December 31, 2023 and 2022 and for the period February 9, 2021 (commencement of operations) through December 31, 2021 Report of Independent Auditors To the Members of International Senior Loan Program, LLC Opinion We have audited the accompanying consolidated financial statements of Internati

February 27, 2024 EX-99.1

Bain Capital Specialty Finance, Inc. Consolidated Statements of Assets and Liabilities (in thousands, except share and per share data)

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Announces December 31, 2023 Financial Results and Declares First Quarter 2024 Dividend of $0.42 per Share and Additional Dividends Totaling $0.12 per Share for 2024 BOSTON – February 27, 2024 – Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the “Company”, “our” or “we”) today announced financial results for the fourth quarter and fiscal year end

February 13, 2024 SC 13G/A

BCSF / Bain Capital Specialty Finance, Inc. / BANK OF AMERICA CORP /DE/ Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 01)* Bain Capital Specialty Finance, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 05684B107 (CUSIP Number) December 31, 2023 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursua

February 13, 2024 EX-99

BANK OF AMERICA CORPORATION LIMITED POWER OF ATTORNEY

EX-99 2 bacpoa.htm BANK OF AMERICA CORPORATION LIMITED POWER OF ATTORNEY BANK OF AMERICA CORPORATION, a Delaware corporation (the "Corporation"), does hereby make, constitute, and appoint each of Szabina Biro, Hannah Chae, Andres Ortiz Custodio, Kamil Dziedzic, Krishnan Harihanran, Kelvin Kwok, Frank Lui, James Todd, Michelle Wong, and Monica Yako as an attorney-in-fact for the Corporation acting

January 30, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 30, 2024 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) Delaware 814-01175 81-2878769 (State or Other Jurisdiction of Incorporatio

January 30, 2024 EX-99.1

Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the Fourth Quarter Ended December 31, 2023

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the Fourth Quarter Ended December 31, 2023 BOSTON – January 30, 2024– Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the “Company”) today announced it will report its financial results for the fourth quarter and fiscal year ended December 31, 2023 on Tuesday, February 27, 2024 after market close. Management will ho

January 3, 2024 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): January 1, 2024 BAIN CAPITAL SPECIALTY FINANCE, INC.

November 7, 2023 EX-99.1

Bain Capital Specialty Finance, Inc. Consolidated Statements of Assets and Liabilities (in thousands, except share and per share data)

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Announces September 30, 2023 Financial Results and Declares Fourth Quarter 2023 Dividend of $0.42 per Share BOSTON – November 6, 2023– Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the “Company”, “our” or “we”) today announced financial results for the third quarter ended September 30, 2023, and that its Board of Directors has declared a divide

November 7, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 06, 2023 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) Delaware 814-01175 81-2878769 (State or Other Jurisdiction of Incorporati

November 6, 2023 EX-10.35

Amendment dated September 11, 2023 to the Amended and Restated Limited Liability Company Agreement, dated February 9, 2021, of International Senior Loan Program, LLC, by and among the Company, Pantheon Private Debt Program SCSp SICAV—RAIF—Pantheon Senior Debt Secondaries II (USD), Pantheon Private Debt Program SCSp SICAV—RAIF—Tubera Credit 2020, Solutio Premium Private Debt I SCSp and Solutio Premium Private Debt II Master SCSp. (incorporated by reference to Exhibit 10.35 to the Company’s Quarterly Report on Form 10-Q (File No.814-01175) filed on November 6, 2023).

Exhibit 10.35 EXECUTION VERSION Conformed through the Fourth Amendment to Loan and Security Agreement dated as of September 11, 2023 LOAN AND SECURITY AGREEMENT dated as of February 9, 2021 among ISLP (L-A), LLC the Financing Providers party hereto the Collateral Administrator, Collateral Agent and Securities Intermediary party hereto JPMORGAN CHASE BANK, NATIONAL ASSOCIATION, as Administrative Ag

November 6, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number: 814-01175 BAIN CAPITAL SPECIALTY FINANCE, INC. (E

October 17, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 17, 2023 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) Delaware 814-01175 81-2878769 (State or Other Jurisdiction of Incorporatio

October 17, 2023 EX-99.1

BOSTON – October 17, 2023

Exhibit 99.1 BOSTON – October 17, 2023– Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the “Company”) today announced it will report its financial results for the third quarter ended September 30, 2023 on Monday, November 6, 2023 after market close. Management will host a conference call on Tuesday, November 7, 2023 at 8:30 a.m. Eastern Time to discuss the Company’s financial results. Conferenc

October 3, 2023 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): September 28, 2023 BAIN CAPITAL SPECIALTY FINANCE, INC.

August 8, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number: 814-01175 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact

August 8, 2023 EX-24.1

Powers of Attorney

Exhibit 24.1 Power of Attorney I, Amy Butte, of 200 Clarendon Street, 37th Floor, Boston, MA 02116, hereby appoint Michael Ewald, Michael Boyle, Jeffrey Hawkins, Michael Treisman, Sally Dornaus, James Goldman and Jessica Yeager as my recognized representatives and true and lawful attorneys-in-fact to sign any and all registration statements and other filings of Bain Capital Specialty Finance, Inc.

August 8, 2023 EX-10.33

First Supplemental Indenture dated as of June 15, 2023 among BCC Middle Market CLO 2018-1, LLC, as issuer, and Wells Fargo Bank, National Association, as trustee. (incorporated by reference to Exhibit 10.33 to the Company’s Quarterly Report on Form 10-Q (File No.814-01175) filed on August 8, 2023).

Exhibit 10.33 Execution Version FIRST SUPPLEMENTAL INDENTURE dated as of June 15, 2023 among BCC MIDDLE MARKET CLO 2018-1, LLC as Issuer and WELLS FARGO BANK, NATIONAL ASSOCIATION as Trustee to the Indenture, dated as of September 28, 2018, between the Issuer and the Trustee THIS FIRST SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), dated as of June 15, 2023, between BCC Middle Market CLO

August 8, 2023 EX-99.1

Bain Capital Specialty Finance, Inc. Consolidated Statements of Assets and Liabilities (in thousands, except share and per share data)

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Announces June 30, 2023 Financial Results and Declares Third Quarter 2023 Dividend of $0.42 per Share BOSTON – August 8, 2023 – Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the “Company”, “our” or “we”) today announced financial results for the second quarter ended June 30, 2023, and that its Board of Directors has declared a dividend of $0.42

August 8, 2023 EX-10.34

Second Supplemental Indenture dated as of June 15, 2023 among BCC Middle Market CLO 2019-1, Ltd., as issuer, BCC Middle Market CLO 2019-1 Co-Issuer, LLC, as co-issuer, and Wells Fargo Bank, National Association, as trustee. (incorporated by reference to Exhibit 10.34 to the Company’s Quarterly Report on Form 10-Q (File No.814-01175) filed on August 8, 2023).

Exhibit 10.34 Execution Version SECOND SUPPLEMENTAL INDENTURE dated as of June 15, 2023 among ARTICLE I BCC MIDDLE MARKET CLO 2019-1, LTD. as Issuer ARTICLE II BCC MIDDLE MARKET CLO 2019-1 CO-ISSUER, LLC as Co-Issuer and ARTICLE III WELLS FARGO BANK, NATIONAL ASSOCIATION as Trustee to the Amended and Restated Indenture, dated as of November 30, 2021, among the Co- Issuers and the Trustee THIS SECO

August 8, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 08, 2023 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) Delaware 814-01175 81-2878769 (State or Other Jurisdiction of Incorporation

July 12, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 12, 2023 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) Delaware 814-01175 81-2878769 (State or Other Jurisdiction of Incorporation)

July 12, 2023 EX-99.1

Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the Second Quarter Ended June 30, 2023

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the Second Quarter Ended June 30, 2023 BOSTON – July 12, 2023 – Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the “Company”) today announced it will report its financial results for the second quarter ended June 30, 2023 on Tuesday, August 8, 2023 after market close. Management will host a conference call on Wedne

May 30, 2023 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): May 25, 2023 BAIN CAPITAL SPECIALTY FINANCE, INC.

May 9, 2023 EX-99.1

Bain Capital Specialty Finance, Inc. Consolidated Statements of Assets and Liabilities (in thousands, except share and per share data)

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Announces March 31, 2023 Financial Results and Declares Second Quarter 2023 Dividend of $0.38 per Share BOSTON – May 9, 2023 – Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the “Company”, “our” or “we”) today announced financial results for the first quarter ended March 31, 2023, and that its Board of Directors has declared a dividend of $0.38

May 9, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number: 814-01175 BAIN CAPITAL SPECIALTY FI

May 9, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): May 9, 2023 BAIN CAPITAL SPECIALTY

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): May 9, 2023 BAIN CAPITAL SPECIALTY FINANCE, INC.

April 21, 2023 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Definitive Proxy State

April 18, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): April 18, 2023 BAIN CAPITAL SPECI

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): April 18, 2023 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) delaware 814-01175 81-2878769 (State or Other Jurisdiction of Incorporation)

April 18, 2023 EX-99.1

Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the First Quarter Ended March 31, 2023

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the First Quarter Ended March 31, 2023 BOSTON – April 18, 2023 – Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the “Company”) today announced it will report its financial results for the first quarter ended March 31, 2023 on Tuesday, May 9, 2023 after market close. Management will host a conference call on Wednesd

March 22, 2023 PRE 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☒ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy State

March 15, 2023 EX-99.1

March 15, 2023

Exhibit 99.1 March 15, 2023 Dear Stockholder, We want to provide a business update in response to the recent Silicon Valley Bank (“SVB”) and Signature Bank (“Signature”) bank failures. In summary, Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the “Company”, “our” or “we”) does not have direct exposure to these banks and we believe our indirect exposure is minimal. The following letter provides

March 15, 2023 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): March 15, 2023 BAIN CAPITAL SPECIALTY FINANCE, INC.

February 28, 2023 EX-10.29

Increasing Lender/Joinder Lender Agreement, dated as of December 14, 2022, between the Company, the Lenders and Issuing Banks from time to time party thereto and Sumitomo Mitsui Banking Corporation, as Administrative Agent (in such capacity, the “Administrative Agent”); and (b) the Notice of Commitment Increase Request, dated as of December 14, 2022, provided by the Company to the Administrative Agent (the “Notice”) (incorporated by reference to Exhibit 10.29 to the Company’s Annual Report on Form 10-K (File No. 814-01175) filed on February 28, 2023).

Exhibit 10.29 EXECUTION COPY INCREASING LENDER/JOINDER LENDER AGREEMENT December 14, 2022 Sumitomo Mitsui Banking Corporation, as Administrative Agent 277 Park Avenue New York, NY 10172 Attention: Hassan Moudnib Phone: 212-224-4501 Re: Bain Capital Specialty Finance, Inc. (the “Company”) Ladies and Gentlemen: We refer to (a) that certain Senior Secured Revolving Credit Agreement, dated as of Decem

February 28, 2023 EX-99.1

Bain Capital Specialty Finance, Inc. Consolidated Statements of Assets and Liabilities (in thousands, except share and per share data)

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Announces December 31, 2022 Financial Results and Declares First Quarter 2023 Dividend of $0.38 per Share BOSTON – February 28, 2023 – Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the “Company”, “our” or “we”) today announced financial results for the fourth quarter and fiscal year ended December 31, 2022, and that its Board of Directors has d

February 28, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 28, 2023 BAIN CAPITAL SPEC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 28, 2023 BAIN CAPITAL SPECIALTY FINANCE, INC.

February 28, 2023 EX-10.13

First Amendment to Amended and Restated Portfolio Management Agreement, dated as of August 2, 2022, between BCC Middle Market CLO 2019-1, LTD. (f/k/a BCC Middle Market CLO 2019-1, LLC), as Issuer, BCC Middle Market CLO 2019-1 Co-Issuer, LLC, as Co-Issuer, and Wells Fargo Bank, National Association, as Trustee (incorporated by reference to Exhibit 10.13 to the Company’s Annual Report on Form 10-K (File No. 814-01175) filed on February 28, 2023).

Exhibit 10.13 EXECUTION VERSION FIRST AMENDMENT TO AMENDED AND RESTATED PORTFOLIO MANAGEMENT AGREEMENT THIS FIRST AMENDMENT TO THE AMENDED AND RESTATED PORTFOLIO MANAGEMENT AGREEMENT (this “Amendment”), dated as of August 2, 2022 (the “Amendment Date”), is entered into by and between BCC MIDDLE MARKET CLO 2019-1, LTD., a private company incorporated with limited liability in Jersey (the “Issuer”),

February 28, 2023 EX-10.11

First Supplemental Indenture, dated as of August 2, 2022, between BCC Middle Market CLO 2019-1, LTD. (f/k/a BCC Middle Market CLO 2019-1, LLC), as Issuer, and Bain Capital Specialty Finance, in its capacity as Portfolio Manager under the Agreement on behalf of the Issuer, and together with its successors in such capacity, the “Portfolio Manager” (incorporated by reference to Exhibit 10.11 to the Company’s Annual Report on Form 10-K (File No. 814-01175) filed on February 28, 2023).

Exhibit 10.11 EXECUTION VERSION FIRST SUPPLEMENTAL INDENTURE among BCC MIDDLE MARKET CLO 2019-1, LTD. (f/k/a BCC Middle Market CLO 2019-1, LLC) as Issuer BCC MIDDLE MARKET CLO 2019-1 CO-ISSUER, LLC as Co-Issuer and WELLS FARGO BANK, NATIONAL ASSOCIATION as Trustee August 2, 2022 THIS FIRST SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), dated as of August 2, 2022, among BCC Middle Market C

February 28, 2023 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number: 814-01175 BAIN CAPITAL SPECIALTY FINANCE

February 22, 2023 EX-99.1

Bain Capital Specialty Finance, Inc. Receives Investment Grade Rating from KBRA

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Receives Investment Grade Rating from KBRA BOSTON – February 22, 2023 – Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the “Company”, “our” or “we”) today announced that Kroll Bond Rating Agency, LLC (“KBRA”) has assigned the Company an investment grade rating of BBB and Stable outlook. “We appreciate KBRA’s thoughtful diligence in assigning BCS

February 22, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 22, 2023 BAIN CAPITAL SPEC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 22, 2023 BAIN CAPITAL SPECIALTY FINANCE, INC.

February 14, 2023 SC 13G

BCSF / Bain Capital Specialty Finance Inc / BANK OF AMERICA CORP /DE/ Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. N/A)* BAIN CAPITAL SPECIALTY FINANCE, INC. (Name of Issuer) Common Stock (Title of Class of Securities) 05684B107 (CUSIP Number) December 31, 2022 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuan

February 14, 2023 EX-99

BANK OF AMERICA CORPORATION LIMITED POWER OF ATTORNEY BANK OF AMERICA CORPORATION

BANK OF AMERICA CORPORATION LIMITED POWER OF ATTORNEY BANK OF AMERICA CORPORATION, a Delaware corporation (the "Corporation"), does hereby make, constitute, and appoint each of Kelvin Kwok, Tolu Tade, Andres Ortiz Custodio, Frank Lui, James Todd, Zainab Tarteel, Hannah Chae and Monica Yako as an attorney-in-fact for the Corporation acting for the Corporation and in the Corporation's name, place and stead, for the Corporation's use and benefit, to bind the Corporation by their execution of those agreements, forms and documents related specifically to Section 13 and Section 16 of the Securities Exchange Act of 1934, and other large shareholder and short position regulatory reporting requirements in other jurisdictions.

February 6, 2023 EX-99.1

Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the Fourth Quarter and Fiscal Year Ended December 31, 2022

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the Fourth Quarter and Fiscal Year Ended December 31, 2022 BOSTON – February 6, 2023 – Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the “Company”) today announced it will report its financial results for the fourth quarter and fiscal year ended December 31, 2022 on Tuesday, February 28, 2023 after market close. M

February 6, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 6, 2023 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) delaware 814-01175 81-2878769 (State or Other Jurisdiction of Incorporatio

December 15, 2022 8-K

Entry into a Material Definitive Agreement

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): December 14, 2022 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) delaware 814-01175 81-2878769 (State or Other Jurisdiction of Incorporati

November 9, 2022 EX-10.28

Second Amendment dated as of August 24, 2022 to Revolving Credit Agreement, dated as of December 24, 2021, by and among the Company as Borrower, with Sumitomo Mitsui Banking Corporation, as Administrative Agent and Sole Book Runner, and with Sumitomo Mitsui Banking Corporation and MUFG Union Bank, N.A., as Joint Lead Arrangers. (incorporated by reference to Exhibit 10.28 to the Company’s Quarterly Report on Form 10-Q (File No.814-01175) filed on November 9, 2022).

Exhibit 10.28 EXECUTION COPY ? SECOND AMENDMENT TO SENIOR SECURED REVOLVING CREDIT AGREEMENT THIS SECOND AMENDMENT TO SENIOR SECURED REVOLVING CREDIT AGREEMENT, dated as of August 24, 2022 (this ?Amendment?), is among BAIN CAPITAL SPECIALTY FINANCE, INC., a Delaware corporation (the ?Borrower?), the LENDERS party hereto and SUMITOMO MITSUI BANKING CORPORATION (?SMBC?), as Administrative Agent (in

November 9, 2022 EX-99.1

As of September 30, 2022

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Announces September 30, 2022 Financial Results and Declares Fourth Quarter 2022 Dividend of $0.36 per Share BOSTON ? November 9, 2022 ? Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the ?Company?, ?our? or ?we?) today announced financial results for the third quarter ended September 30, 2022, and that its Board of Directors has declared a divid

November 9, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents ? ? UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

November 9, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): November 9, 2022 BAIN CAPITAL SPECIALTY FINANCE, INC.

November 9, 2022 EX-10.26

First Amendment dated as of July 6, 2022 to Revolving Credit Agreement, dated as of December 24, 2021, by and among the Company as Borrower, with Sumitomo Mitsui Banking Corporation, as Administrative Agent and Sole Book Runner, and with Sumitomo Mitsui Banking Corporation and MUFG Union Bank, N.A., as Joint Lead Arrangers. (incorporated by reference to Exhibit 10.26 to the Company’s Quarterly Report on Form 10-Q (File No.814-01175) filed on November 9, 2022).

? Exhibit 10.26 FIRST AMENDMENT TO SENIOR SECURED REVOLVING CREDIT AGREEMENT THIS FIRST AMENDMENT TO SENIOR SECURED REVOLVING CREDIT AGREEMENT, dated as of July 6, 2022 (this ?Amendment?), is among BAIN CAPITAL SPECIALTY FINANCE, INC., a Delaware corporation (the ?Borrower?), the LENDERS party hereto and SUMITOMO MITSUI BANKING CORPORATION (?SMBC?), as Administrative Agent (in such capacity, the ?

October 13, 2022 EX-99.1

Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the Third Quarter Ended September 30, 2022

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the Third Quarter Ended September 30, 2022 BOSTON ? October 13, 2022 ? Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the ?Company?) today announced it will report its financial results for the third quarter ended September 30, 2022 on Wednesday, November 9, 2022 after market close. Management will host a conferenc

October 13, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): October 13, 2022 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) delaware 814-01175 81-2878769 (State or Other Jurisdiction of Incorporatio

August 29, 2022 8-K

Entry into a Material Definitive Agreement, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): August 24, 2022 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) delaware 814-01175 81-2878769 (State or Other Jurisdiction of Incorporation

August 3, 2022 EX-99.1

As of June 30, 2022

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Announces June 30, 2022 Financial Results and Declares Third Quarter 2022 Dividend of $0.34 per Share BOSTON ? August 3, 2022 ? Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the ?Company?, ?our? or ?we?) today announced financial results for the second quarter ended June 30, 2022, and that its Board of Directors has declared a dividend of $0.34

August 3, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents ? ? UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

August 3, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): August 3, 2022 BAIN CAPITAL SPECIALTY FINANCE, INC.

August 3, 2022 EX-10.27

First Amendment dated as of July 6, 2022 to Revolving Credit Agreement, dated as of December 24, 2021, by and among the Company as Borrower, with Sumitomo Mitsui Banking Corporation, as Administrative Agent and Sole Book Runner, and with Sumitomo Mitsui Banking Corporation and MUFG Union Bank, N.A., as Joint Lead Arrangers.

Exhibit 10.27 FIRST AMENDMENT TO SENIOR SECURED REVOLVING CREDIT AGREEMENT THIS FIRST AMENDMENT TO SENIOR SECURED REVOLVING CREDIT AGREEMENT, dated as of July 6, 2022 (this ?Amendment?), is among BAIN CAPITAL SPECIALTY FINANCE, INC., a Delaware corporation (the ?Borrower?), the LENDERS party hereto and SUMITOMO MITSUI BANKING CORPORATION (?SMBC?), as Administrative Agent (in such capacity, the ?Ad

August 3, 2022 EX-10.28

Increasing Lender/Joinder Lender Agreement dated as of July 22, 2022, pursuant to Section 2.08(e) of the Revolving Credit Agreement, dated as of December 24, 2021, by and among the Company as Borrower, with Sumitomo Mitsui Banking Corporation, as Administrative Agent and Sole Book Runner, and with Sumitomo Mitsui Banking Corporation and MUFG Union Bank, N.A., as Joint Lead Arrangers. (Incorporated by reference to Exhibit 10.28 to the Company’s Quarterly Report on Form 10 Q (File No. 814 01175), filed on August 3, 2022).

Exhibit 10.28 INCREASING LENDER/JOINDER LENDER AGREEMENT July 22, 2022 Sumitomo Mitsui Banking Corporation, as Administrative Agent 277 Park Avenue New York, NY 10172 Attention: Hassan Moudnib Phone: 212-224-4501 Re: Bain Capital Specialty Finance, Inc. (the ?Company?) Ladies and Gentlemen: We refer to (a) that certain Senior Secured Revolving Credit Agreement, dated as of December 24, 2021 (as am

August 1, 2022 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): July 27, 2022 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) delaware 814-01175 81-2878769 (State or Other Jurisdiction of Incorporation)

July 25, 2022 8-K

Entry into a Material Definitive Agreement

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): July 22, 2022 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) delaware 814-01175 81-2878769 (State or Other Jurisdiction of Incorporation)

July 8, 2022 8-K

Entry into a Material Definitive Agreement

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): July 6, 2022 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) DELAWARE 814-01175 81-2878769 (State or Other Jurisdiction of Incorporation) (

July 7, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

8-K 1 tm2220629d18k.htm FORM 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): July 7, 2022 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) DELAWARE 814-01175 81-2878769 (State or Other

July 7, 2022 EX-99.1

Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the Second Quarter Ended June 30, 2022

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the Second Quarter Ended June 30, 2022 BOSTON ? July 7, 2022 ? Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the ?Company?) today announced it will report its financial results for the second quarter ended June 30, 2022 on Wednesday, August 3, 2022 after market close. Management will host a conference call on Thur

July 1, 2022 EX-FILING FEES

Filing Fee Table (filed herewith).

Exhibit 107 Calculation of Filing Fee Tables Form N-2 (Form Type) BAIN CAPITAL SPECIALTY FINANCE, INC.

July 1, 2022 EX-99.1

Opinion and Consent of Dechert LLP (filed herewith).

Exhibit (l) 1095 Avenue of the Americas New York, NY 10036 - 6797 +1 212 698 3500 Main +1 212 698 3599 Fax www.

July 1, 2022 EX-99.(N)(1)

Consent of Independent Registered Public Accounting Firm (filed herewith).

Exhibit 99.(n)(1) CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We hereby consent to the incorporation by reference in this Registration Statement on Form N-2 of Bain Capital Specialty Finance, Inc. of our report dated February 23, 2022 relating to the financial statements, senior securities table and the effectiveness of internal control over financial reporting, which appears in Bain

July 1, 2022 N-2ASR

As filed with the Securities and Exchange Commission on June 30, 2022

TABLE OF CONTENTS As filed with the Securities and Exchange Commission on June 30, 2022 Securities Act Registration No.

May 27, 2022 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): May 26, 2022 BAIN CAPITAL SPECIALTY FINANCE, INC.

May 5, 2022 EX-10.11

Amended and Restated Portfolio Management Agreement, dated as of November 30, 2021, by and between BCC Middle Market CLO 2019-1, LLC, as issuer, and Bain Capital Specialty Finance, Inc., as portfolio manager. (incorporated by reference to Exhibit 10.11 to the Company’s Quarterly Report on Form 10-Q (File No. 814-01175), filed on May 5, 2022)

Exhibit 10.11 EXECUTION VERSION AMENDED AND RESTATED PORTFOLIO MANAGEMENT AGREEMENT This Amended and Restated Portfolio Management Agreement (this ?Agreement?), dated as of November 30, 2021, is entered into by and between BCC MIDDLE MARKET CLO 2019-1, LLC, a Cayman Islands limited liability company, as issuer (together with successors and assigns permitted hereunder, the ?Issuer?) and BAIN CAPITA

May 5, 2022 EX-10.10

Amended and Restated Indenture, dated as of November 30, 2021, between BCC Middle Market CLO 2019-1, LLC, as issuer, BCC Middle Market CLO 2019-1 Co-Issuer, LLC, as co-issuer and Wells Fargo Bank, National Association, as trustee. (incorporated by reference to Exhibit 10.10 to the Company’s Quarterly Report on Form 10-Q (File No. 814-01175), filed on May 5, 2022).

Exhibit 10.10 EXECUTION VERSION BCC MIDDLE MARKET CLO 2019-1, LLC, Issuer, BCC MIDDLE MARKET CLO 2019-1 CO-ISSUER, LLC, Co-Issuer, AND WELLS FARGO BANK, NATIONAL ASSOCIATION, Trustee AMENDED AND RESTATED INDENTURE Dated as of November 30, 2021 TABLE OF CONTENTS Page ARTICLE I DEFINITIONS 9 Section 1.1. Definitions 9 Section 1.2. Assumptions as to Pledged Obligations 9 ARTICLE II THE NOTES 13 Secti

May 5, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number: 814-01175 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact

May 5, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): May 5, 2022 BAIN CAPITAL SPECIALTY FINANCE, INC.

May 5, 2022 EX-99.1

Bain Capital Specialty Finance, Inc. Consolidated Statements of Assets and Liabilities (in thousands, except share and per share data)

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Announces March 31, 2022 Financial Results and Declares Second Quarter 2022 Dividend of $0.34 per Share BOSTON ? May 5, 2022 ? Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the ?Company?, ?our? or ?we?) today announced financial results for the first quarter ended March 31, 2022, and that its Board of Directors has declared a dividend of $0.34

April 18, 2022 EX-99.1

Bain Capital Specialty Finance, Inc. Receives Investment Grade Rating from Fitch

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Receives Investment Grade Rating from Fitch BOSTON ? April 18, 2022 ? Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the ?Company?, ?our? or ?we?) today announced that Fitch Ratings, Inc. (?Fitch?) has assigned the Company with an investment grade rating of BBB- and Stable outlook. ?We are pleased to have received an investment grade rating from

April 18, 2022 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): April 18, 2022 BAIN CAPITAL SPECIALTY FINANCE, INC.

April 15, 2022 DEF 14A

our definitive proxy statement on Schedule 14A, filed with the SEC on April 15, 2022

? UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? ? Definitive Proxy

April 8, 2022 EX-99.1

Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the First Quarter Ended March 31, 2022

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the First Quarter Ended March 31, 2022 BOSTON ? April 8, 2022 ? Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the ?Company?) today announced it will report its financial results for the first quarter ended March 31, 2022 on Thursday, May 5, 2022 after market close. Management will host a conference call on Friday,

April 8, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): April 8, 2022 BAIN CAPITAL SPECIALTY FINANCE, INC.

March 24, 2022 PRE 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

? UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? ? Definitive Proxy

February 23, 2022 EX-10.41

Revolving Credit Agreement, dated as of December 24, 2021, by and among the Company as Borrower, with Sumitomo Mitsui Banking Corporation, as Administrative Agent and Sole Book Runner, and with Sumitomo Mitsui Banking Corporation and MUFG Union Bank, N.A., as Joint Lead Arrangers (incorporated by reference to Exhibit 10.41 to the Company’s Annual Report on Form 10-K (File No. 814-01175) filed on February 23, 2022).

Exhibit 10.41 EXECUTION COPY SENIOR SECURED REVOLVING CREDIT AGREEMENT dated as of December 24, 2021 among BAIN CAPITAL SPECIALTY FINANCE, INC. as Borrower The LENDERS And ISSUING BANKS Party Hereto and SUMITOMO MITSUI BANKING CORPORATION as Administrative Agent $300,000,000 SUMITOMO MITSUI BANKING CORPORATION Sole Book Runner SUMITOMO MITSUI BANKING CORPORATION and MUFG UNION BANK, N.A. as Joint

February 23, 2022 EX-99.1

As of December 31, 2021

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Announces December 31, 2021 Financial Results and Declares First Quarter 2022 Dividend of $0.34 per Share BOSTON ? February 23, 2022 ? Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the ?Company?, ?our? or ?we?) today announced financial results for the fourth quarter and fiscal year ended December 31, 2021, and that its Board of Directors has d

February 23, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 23, 2022 BAIN CAPITAL SPECIALTY FINANCE, INC.

February 23, 2022 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

TABLE OF CONTENTS ? ? UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

February 23, 2022 EX-10.42

Amended and Restated Limited Liability Company Agreement, dated December 27, 2021, of Bain Capital Senior Loan Program, LLC. (incorporated by reference to Exhibit 10.42 to the Company’s Annual Report on Form 10-K (File No. 814-01175) filed on February 23, 2022).

Exhibit 10.42 Execution Version BAIN CAPITAL SENIOR LOAN PROGRAM, LLC AMENDED AND RESTATED LIMITED LIABILITY COMPANY AGREEMENT THE SECURITIES REPRESENTED BY THIS AGREEMENT HAVE NOT BEEN REGISTERED UNDER THE U.S. SECURITIES ACT OF 1933, AS AMENDED (THE ?SECURITIES ACT?), OR REGISTERED OR QUALIFIED UNDER THE SECURITIES LAWS OF ANY STATES OR OTHER JURISDICTIONS. THEY ARE BEING OFFERED AND SOLD IN REL

February 14, 2022 EX-99.1

Bain Capital Specialty Finance, Inc. Announces Formation of Bain Capital Senior Loan Program, LLC

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Announces Formation of Bain Capital Senior Loan Program, LLC BOSTON ? February 14, 2022 ? Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the ?Company?) today announced the formation of Bain Capital Senior Loan Program, LLC (?SLP?). The SLP will provide BCSF with greater balance sheet flexibility to capitalize on senior middle market loan opportu

February 14, 2022 SC 13G/A

BCSF / Bain Capital Specialty Finance Inc / DIMENSION CAPITAL MANAGEMENT LLC Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No.

February 14, 2022 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 9, 2022 BAIN CAPITAL SPECIALTY FINANCE, INC.

February 14, 2022 SC 13G/A

BCSF / Bain Capital Specialty Finance Inc / DIMENSION CAPITAL MANAGEMENT LLC Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No.

January 21, 2022 EX-99.1

Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the Fourth Quarter and Fiscal Year Ended December 31, 2021

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the Fourth Quarter and Fiscal Year Ended December 31, 2021 BOSTON ? January 21, 2022 ? Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the ?Company?) today announced it will report its financial results for the fourth quarter and fiscal year ended December 31, 2021 on Wednesday, February 23, 2022 after market close.

January 21, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): January 21, 2022 BAIN CAPITAL SPECIALTY FINANCE, INC.

December 30, 2021 8-K

Entry into a Material Definitive Agreement, Termination of a Material Definitive Agreement, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): December 24, 2021 BAIN CAPITAL SPECIALTY FINANCE, INC.

November 3, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): November 3, 2021 BAIN CAPITAL SPECIALTY FINANCE, INC.

November 3, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number: 814-01175 BAIN CAPITAL SPECIALTY FINANCE, INC. (E

November 3, 2021 EX-99.1

Bain Capital Specialty Finance, Inc. Consolidated Statements of Assets and Liabilities (in thousands, except share and per share data

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Announces September 30, 2021 Financial Results and Declares Fourth Quarter 2021 Dividend of $0.34 per Share BOSTON ? November 3, 2021 ? Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the ?Company?, ?our? or ?we?) today announced financial results for the third quarter ended September 30, 2021, and that its Board of Directors has declared a divid

October 13, 2021 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): October 13, 2021 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) DELAWARE 814-01175 81-2878769 (State or Other Jurisdiction of Incorporatio

October 13, 2021 EX-99.1

SECOND SUPPLEMENTAL INDENTURE BAIN CAPITAL SPECIALTY FINANCE, INC. U.S. BANK NATIONAL ASSOCIATION, as Trustee Dated as of October 13, 2021 SECOND SUPPLEMENTAL INDENTURE

Exhibit 99.1 SECOND SUPPLEMENTAL INDENTURE between BAIN CAPITAL SPECIALTY FINANCE, INC. and U.S. BANK NATIONAL ASSOCIATION, as Trustee Dated as of October 13, 2021 SECOND SUPPLEMENTAL INDENTURE THIS SECOND SUPPLEMENTAL INDENTURE (this ?Second Supplemental Indenture?), dated as of October 13, 2021, is between Bain Capital Specialty Finance, Inc., a Delaware corporation (the ?Company?), and U.S. Ban

October 13, 2021 EX-99.3

1095 Avenue of the Americas

Exhibit 99.3 1095 Avenue of the Americas New York, NY 10036 - 6797 +1 212 698 3500 Main +1 212 698 3599 Fax www.dechert.com October 13, 2021 Bain Capital Specialty Finance, Inc. 200 Clarendon Street, 37th Floor Boston, MA 02116 Re: Registration Statement on Form N-2 Ladies and Gentlemen: We have acted as counsel to Bain Capital Specialty Finance, Inc., a Delaware corporation (the ?Company?), in co

October 8, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): October 8, 2021 BAIN CAPITAL SPECIALTY FINANCE, INC.

October 8, 2021 EX-99.1

Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the Third Quarter Ended September 30, 2021

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the Third Quarter Ended September 30, 2021 BOSTON ? October 8, 2021 ? Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the ?Company?) today announced it will report its financial results for the third quarter ended September 30, 2021 on Wednesday, November 3, 2021 after market close. Management will host a conference

October 6, 2021 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): October 5, 2021 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) DELAWARE 814-01175 81-2878769 (State or Other Jurisdiction of Incorporation

October 6, 2021 EX-99.1

Bain Capital Specialty Finance, Inc. $300,000,000 Aggregate Principal Amount 2.550% Notes due 2026 UNDERWRITING AGREEMENT

Exhibit 99.1 Execution Version Bain Capital Specialty Finance, Inc. $300,000,000 Aggregate Principal Amount 2.550% Notes due 2026 UNDERWRITING AGREEMENT October 5, 2021 Goldman Sachs & Co. LLC SMBC Nikko Securities America, Inc. As Representatives of the Underwriters named in Schedule A hereto c/o Goldman Sachs & Co. LLC 200 West Street New York, New York 10282 c/o SMBC Nikko Securities America, I

October 6, 2021 424B2

$300,000,000 BAIN CAPITAL SPECIALTY FINANCE, INC. 2.550% Notes due 2026

TABLE OF CONTENTS ?Filed Pursuant to Rule 424(b)(2)? ?File No. 333-250965? PROSPECTUS SUPPLEMENT To the Prospectus dated February 11, 2021 $300,000,000 BAIN CAPITAL SPECIALTY FINANCE, INC. 2.550% Notes due 2026 We are offering for sale $300,000,000 in aggregate principal amount of 2.550 % Notes due 2026, which we refer to as the Notes. The Notes will mature on October 13, 2026. We will pay interes

October 5, 2021 EX-99.1

Bain Capital Specialty Finance, Inc. Prices Public Offering of $300 Million 2.550% Unsecured Notes Due 2026

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Prices Public Offering of $300 Million 2.550% Unsecured Notes Due 2026 BOSTON ? October 5, 2021 ? Bain Capital Specialty Finance, Inc. (NYSE: BCSF or the ?Company?) today announced that it has priced an offering of $300.0 million aggregate principal amount of 2.550% senior unsecured notes due 2026 (the ?Notes?). The Notes will mature on October 13,

October 5, 2021 FWP

Bain Capital Specialty Finance, Inc. 2.550% Notes due 2026 PRICING TERM SHEET October 5, 2021

Filed Pursuant to Rule 433 Issuer Free Writing Prospectus dated October 5, 2021 Relating to Preliminary Prospectus Supplement dated October 5, 2021 Prospectus dated February 11, 2021 Registration No.

October 5, 2021 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): October 5, 2021 BAIN CAPITAL SPECIALTY FINANCE, INC.

October 5, 2021 424B2

SUBJECT TO COMPLETION, DATED OCTOBER 5, 2021

TABLE OF CONTENTS The information in this preliminary prospectus supplement is not complete and may be changed.

August 4, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): August 4, 2021 BAIN CAPITAL SPECIALTY FINANCE, INC.

August 4, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number: 814-01175 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact

August 4, 2021 EX-99.1

As of March 31, 2021

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Announces June 30, 2021 Financial Results and Declares Third Quarter 2021 Dividend of $0.34 per Share BOSTON ? August 4, 2021 ? Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the ?Company?, ?our? or ?we?) today announced its financial results for the second quarter ended June 30, 2021, and that its Board of Directors has declared a dividend of $

July 8, 2021 EX-99.1

Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the Second Quarter Ended June 30, 2021

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the Second Quarter Ended June 30, 2021 BOSTON ? July 8, 2021 ? Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the ?Company?) today announced it will report its financial results for the second quarter ended June 30, 2021 on Wednesday, August 4, 2021 after market close. Management will host a conference call on Thur

July 8, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): July 8, 2021 BAIN CAPITAL SPECIALTY FINANCE, INC.

May 28, 2021 8-K

Submission of Matters to a Vote of Security Holders

8-K 1 tm2117888d18k.htm FORM 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): May 27, 2021 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) DELAWARE 814-01175 81-2878769 (State or Other J

May 10, 2021 APP WD/A

- APP WD

1095 Avenue of the Americas New York, NY 10036-6797 +1 212 698 3500 Main +1 212 698 3599 Fax www.

May 5, 2021 10-Q

Quarterly Report - FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number: 814-01175 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact

May 5, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): May 5, 2021 BAIN CAPITAL SPECIALTY FINANCE, INC.

May 5, 2021 EX-99.1

As of March 31, 2021

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Announces March 31, 2021 Financial Results and Declares Second Quarter 2021 Dividend of $0.34 per Share BOSTON ? May 5, 2021 ? Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the ?Company?, ?our? or ?we?) today announced its financial results for the first quarter ended March 31, 2021, and that its Board of Directors has declared a dividend of $0

April 23, 2021 APP WD

- APP WD

1095 Avenue of the Americas New York, NY 10036-6797 +1 212 698 3500 Main +1 212 698 3599 Fax www.

April 19, 2021 DEF 14A

our definitive proxy statement on Schedule 14A, filed with the SEC on April 19, 2021;

? UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? ? Definitive Proxy

April 16, 2021 CORRESP

* * * * *

1095 Avenue of the Americas New York, NY 10036-6797 +1 212 698 3500 Main +1 212 698 3599 Fax www.

April 6, 2021 EX-99.1

Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the First Quarter Ended March 31, 2021

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the First Quarter Ended March 31, 2021 BOSTON ? April 6, 2021 ? Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the ?Company?) today announced it will report its financial results for the first quarter ended March 31, 2021 on Wednesday, May 5, 2021 after market close. Management will host a conference call on Thursd

April 6, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): April 6, 2021 BAIN CAPITAL SPECIALTY FINANCE, INC.

March 24, 2021 CORRESP

1095 Avenue of the Americas

1095 Avenue of the Americas New York, NY 10036-6797 +1 212 698 3500 Main +1 212 698 3599 Fax www.

March 24, 2021 PRE 14A

- PRE 14A

? UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? ? Definitive Proxy

March 12, 2021 8-K

Termination of a Material Definitive Agreement

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): March 11, 2021 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) DELAWARE 814-01175 81-2878769 (State or Other Jurisdiction (Commission (I.R.

March 10, 2021 EX-99.2

FIRST SUPPLEMENTAL INDENTURE BAIN CAPITAL SPECIALTY FINANCE, INC. U.S. BANK NATIONAL ASSOCIATION, as Trustee Dated as of March 10, 2021 FIRST SUPPLEMENTAL INDENTURE

Exhibit 99.2 FIRST SUPPLEMENTAL INDENTURE between BAIN CAPITAL SPECIALTY FINANCE, INC. and U.S. BANK NATIONAL ASSOCIATION, as Trustee Dated as of March 10, 2021 FIRST SUPPLEMENTAL INDENTURE THIS FIRST SUPPLEMENTAL INDENTURE (this ?First Supplemental Indenture?), dated as of March 10, 2021, is between Bain Capital Specialty Finance, Inc., a Delaware corporation (the ?Company?), and U.S. Bank Nation

March 10, 2021 EX-99.4

1095 Avenue of the Americas

Exhibit 99.4 1095 Avenue of the Americas New York, NY 10036 - 6797 +1 212 698 3500 Main +1 212 698 3599 Fax www.dechert.com March 10, 2021 Bain Capital Specialty Finance, Inc. 200 Clarendon Street, 37th Floor Boston, MA 02116 Re: Registration Statement on Form N-2 Ladies and Gentlemen: We have acted as counsel to Bain Capital Specialty Finance, Inc., a Delaware corporation (the ?Company?), in conn

March 10, 2021 EX-99.1

BAIN CAPITAL SPECIALTY FINANCE, INC. U.S. BANK NATIONAL ASSOCIATION Dated as of March 10, 2021 Providing for the Issuance Debt Securities Bain Capital Specialty Finance, Inc. Reconciliation and tie between Trust Indenture Act of 1939 and Indenture, d

Exhibit 99.1 BAIN CAPITAL SPECIALTY FINANCE, INC. Issuer and U.S. BANK NATIONAL ASSOCIATION Trustee Indenture Dated as of March 10, 2021 Providing for the Issuance Of Debt Securities Bain Capital Specialty Finance, Inc. Reconciliation and tie between Trust Indenture Act of 1939 and Indenture, dated as of March 10, 2021 Trust Indenture Act Section Indenture Section § 310 (a)(1) 607 (a)(2) 607 (b) 6

March 10, 2021 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): March 10, 2021 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) DELAWARE 814-01175 81-2878769 (State or Other Jurisdiction of Incorporation)

March 5, 2021 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): March 3, 2021 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) DELAWARE 814-01175 81-2878769 (State or Other Jurisdiction of Incorporation)

March 5, 2021 EX-99.1

Bain Capital Specialty Finance, Inc. $300,000,000 Aggregate Principal Amount 2.950% Notes due March 10, 2026 UNDERWRITING AGREEMENT

Exhibit 99.1 Execution Version Bain Capital Specialty Finance, Inc. $300,000,000 Aggregate Principal Amount 2.950% Notes due March 10, 2026 UNDERWRITING AGREEMENT March 3, 2021 Goldman Sachs & Co. LLC As Representative of the Underwriters named in Schedule A hereto c/o Goldman Sachs & Co. LLC 200 West Street New York, New York 10282 Ladies and Gentlemen: Bain Capital Specialty Finance, Inc., a Del

March 4, 2021 FWP

Bain Capital Specialty Finance, Inc. 2.950% Notes due 2026 PRICING TERM SHEET March 3, 2021

Filed Pursuant to Rule 433 Issuer Free Writing Prospectus dated March 3, 2021 Relating to Preliminary Prospectus Supplement dated March 3, 2021 Prospectus dated February 11, 2021 Registration No.

March 4, 2021 424B2

$300,000,000 BAIN CAPITAL SPECIALTY FINANCE, INC. 2.950% Notes due 2026

TABLE OF CONTENTS ?Filed Pursuant to Rule 424(b)(2)? ?File No. 333-250965? PROSPECTUS SUPPLEMENT To the Prospectus dated February 11, 2021 $300,000,000 BAIN CAPITAL SPECIALTY FINANCE, INC. 2.950% Notes due 2026 We are offering for sale $300,000,000 in aggregate principal amount of 2.950% Notes due 2026, which we refer to as the Notes. The Notes will mature on March 10, 2026. We will pay interest o

March 3, 2021 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): March 3, 2021 BAIN CAPITAL SPECIALTY FINANCE, INC.

March 3, 2021 EX-99.1

Bain Capital Specialty Finance, Inc. Prices Public Offering of $300 Million of 2.950% Unsecured Notes Due 2026

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Prices Public Offering of $300 Million of 2.950% Unsecured Notes Due 2026 BOSTON ? March 3, 2021 ? Bain Capital Specialty Finance, Inc. (NYSE: BCSF or the ?Company?) today announced that it has priced an offering of $300.0 million aggregate principal amount of 2.950% senior unsecured notes due 2026 (the ?Notes?). The Notes will mature on March 10,

March 3, 2021 424B2

SUBJECT TO COMPLETION, DATED MARCH 3, 2021

TABLE OF CONTENTS The information in this preliminary prospectus supplement is not complete and may be changed.

February 25, 2021 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 25, 2021 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) DELAWARE 814-01175 81-2878769 (State or Other Jurisdiction of Incorporati

February 25, 2021 EX-99.1

Bain Capital Specialty Finance, Inc. Receives Investment Grade Rating from Moody’s

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Receives Investment Grade Rating from Moody’s BOSTON – February 25, 2021 – Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the “Company”, “our” or “we”) today announced that Moody’s Investors Service (“Moody’s”) has assigned the Company with an investment grade rating of Baa3 and Stable outlook. “We are pleased to receive an investment grade rati

February 24, 2021 EX-99.1

Bain Capital Specialty Finance, Inc. Consolidated Statements of Assets and Liabilities (in thousands, except share and per share data)

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Announces December 31, 2020 Financial Results and Declares First Quarter 2021 Dividend of $0.34 per Share BOSTON – February 24, 2021 – Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the “Company”, “our” or “we”) today announced its financial results for the fourth quarter and fiscal year December 31, 2020, and that its Board of Directors has dec

February 24, 2021 8-K

Results of Operations and Financial Condition, Other Events, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 24, 2021 BAIN CAPITAL SPECIALTY FINANCE, INC.

February 24, 2021 EX-10.31

Amended and Restated Limited Liability Company Agreement, dated February 9, 2021, of International Senior Loan Program, LLC, by and among the Company, Pantheon Private Debt Program SCSp SICAV—RAIF—Pantheon Senior Debt Secondaries II (USD), Pantheon Private Debt Program SCSp SICAV—RAIF—Tubera Credit 2020, Solutio Premium Private Debt I SCSp and Solutio Premium Private Debt II Master SCSp (incorporated by reference to Exhibit 10.31 to the Company’s Annual Report on Form 10-K (File No. 814-01175) filed on February 24, 2021).

Exhibit 10.31 Execution Version INTERNATIONAL SENIOR LOAN PROGRAM, LLC AMENDED AND RESTATED LIMITED LIABILITY COMPANY AGREEMENT THE SECURITIES REPRESENTED BY THIS AGREEMENT HAVE NOT BEEN REGISTERED UNDER THE U.S. SECURITIES ACT OF 1933, AS AMENDED (THE ?SECURITIES ACT?), OR REGISTERED OR QUALIFIED UNDER THE SECURITIES LAWS OF ANY STATES OR OTHER JURISDICTIONS. THEY ARE BEING OFFERED AND SOLD IN RE

February 24, 2021 10-K

Annual Report - FORM 10-K

TABLE OF CONTENTS ? ? UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

February 11, 2021 EX-99.1

Preliminary Results as of December 31, 2020

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Announces Preliminary December 31, 2020 Financial Results BOSTON – February 11, 2021 – Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the “Company”, “our” or “we”) today announced its preliminary financial results for the fourth quarter and fiscal year December 31, 2020. “We are pleased that our fourth quarter results are expected to produce str

February 11, 2021 8-K

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 9, 2021 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) DELAWARE 814-01175 81-2878769 (State or Other Jurisdiction of Incorporatio

February 11, 2021 EX-99.2

Bain Capital Specialty Finance, Inc. Forms Strategic Partnership with Pantheon Joint Venture Further Expands BCSF’s Global Reach and Capabilities

Exhibit 99.2 Bain Capital Specialty Finance, Inc. Forms Strategic Partnership with Pantheon Joint Venture Further Expands BCSF’s Global Reach and Capabilities BOSTON – February 11, 2021 – Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the “Company”) today announced the formation of a joint venture with the private credit business of Pantheon (“Pantheon”), a leading global alternative private ma

February 9, 2021 CORRESP

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Three Bryant Park 1095 Avenue of the Americas New York, NY 10036-6797 +1 212 698 3500 Main +1 212 698 3599 Fax www.

February 8, 2021 CORRESP

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BAIN CAPITAL SPECIALTY FINANCE, INC. 200 Clarendon Street, 37th Floor Boston, Massachusetts 02116 VIA EDGAR February 8, 2021 Ms. Lisa Larkin U.S. Securities and Exchange Commission Division of Investment Management 100 F Street, NE Washington, DC 20549 Re: Bain Capital Specialty Finance, Inc. Registration Statement on Form N-2 SEC File No. 333-250965 Dear Ms. Larkin: Pursuant to Rule 461 under the

January 26, 2021 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): January 25, 2021 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) DELAWARE 814-01175 81-2878769 (State or Other Jurisdiction (Commission (I.

January 21, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): January 21, 2021 BAIN CAPITAL SPECIALTY FINANCE, INC.

January 21, 2021 EX-99.1

Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the Fourth Quarter and Fiscal Year Ended December 31, 2020

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the Fourth Quarter and Fiscal Year Ended December 31, 2020 BOSTON – January 21, 2021 – Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the “Company”) today announced it will report its financial results for the fourth quarter and fiscal year ended December 31, 2020 on Wednesday, February 24, 2021 after market close.

November 30, 2020 DEL AM

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Bain Capital Specialty Finance, Inc. 200 Clarendon Street, 37th Floor Boston, MA 02116 November 30, 2020 VIA EDGAR U.S. Securities and Exchange Commission 100 F Street, NE Washington, D.C. 20549-4720 Re: Bain Capital Specialty Finance, Inc. (the “Registrant”) Registration Statement on Form N-2 File No.: 333-250965 Ladies and Gentlemen: On behalf of Bain Capital Specialty Finance, Inc., pursuant to

November 5, 2020 EX-10.30

Second Amended and Restated Credit Agreement, dated August 14, 2020, among the Company as Equity Holder, BCSF I, LLC as Borrower, and Goldman Sachs Bank USA, as Sole Lead Arranger, Syndication Agent and Administrative Agent, and U.S. Bank National Association as Collateral Administrator, Collateral Agent and Collateral Custodian (incorporated by reference to Exhibit 10.30 to the Company’s Quarterly Report on Form 10-Q (File No. 814-01175), filed on November 5, 2020).

Exhibit 10.30 EXECUTION VERSION SECOND AMENDED AND RESTATED CREDIT AGREEMENT dated as of August 14, 2020 by and among BCSF I, LLC, as Borrower, VARIOUS LENDERS, GOLDMAN SACHS BANK USA, as Sole Lead Arranger and Syndication Agent GOLDMAN SACHS BANK USA, as Administrative Agent U.S. BANK NATIONAL ASSOCIATION, as Collateral Administrator U.S. BANK NATIONAL ASSOCIATION, as Collateral Agent and U.S. BA

November 5, 2020 EX-99.1

Bain Capital Specialty Finance, Inc. Consolidated Statements of Assets and Liabilities (in thousands, except share and per share data)

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Announces September 30, 2020 Financial Results and Declares Fourth Quarter 2020 Dividend of $0.34 per Share BOSTON – November 5, 2020 – Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the “Company”, “our” or “we”) today announced its financial results for the third quarter September 30, 2020, and that its Board of Directors has declared a dividen

November 5, 2020 10-Q

Quarterly Report - FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2020 OR ¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number: 814-01175 BAIN CAPITAL SPECIALTY FINANCE, INC. (E

November 5, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events - FORM 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): November 5, 2020 BAIN CAPITAL SPECIALTY FINANCE, INC.

October 6, 2020 EX-99.1

Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the Third Quarter Ended September 30, 2020

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the Third Quarter Ended September 30, 2020 BOSTON – October 6, 2020 – Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the “Company”) announced today it will report its financial results for the third quarter ended September 30, 2020 on Thursday, November 5, 2020 after market close. Management will host a conference

October 6, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - FORM 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): October 6, 2020 BAIN CAPITAL SPECIALTY FINANCE, INC.

August 17, 2020 8-K

Entry into a Material Definitive Agreement

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): August 14, 2020 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) DELAWARE 814-01175 81-2878769 (State or Other Jurisdiction of Incorporation

August 5, 2020 EX-99.1

Bain Capital Specialty Finance, Inc. Announces June 30, 2020 Financial Results and Declares Third Quarter 2020 Dividend of $0.34 per Share

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Announces June 30, 2020 Financial Results and Declares Third Quarter 2020 Dividend of $0.34 per Share BOSTON – August 5, 2020 – Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the “Company”, “our” or “we”) announced today its financial results for the second quarter June 30, 2020 and that its Board of Directors has declared a dividend of $0.34 pe

August 5, 2020 EX-10.28

Master Note Purchase Agreement, dated June 10, 2020, of the Company (incorporated by reference to Exhibit 10.28 to the Company’s Quarterly Report on Form 10-Q (File No. 814-01175), filed on August 5, 2020).

Exhibit 10.28 EXECUTION VERSION BAIN CAPITAL SPECIALTY FINANCE, INC. $150,000,000 Senior Notes due 2023 MASTER Note Purchase Agreement Dated June 10, 2020 Table of Contents Section Heading Page Section 1. Authorization of Notes 1 Section 2. Sale and Purchase of Notes 1 Section 2.1 Sale and Purchase of Series 2020 Notes 1 Section 2.2 Additional Series of Notes 1 Section 3. Closing 2 Section 4. Cond

August 5, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): August 5, 2020 BAIN CAPITAL SPECIALTY FINANCE, INC.

August 5, 2020 10-Q

Quarterly Report - FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2020 OR ¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number: 814-01175 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact

August 5, 2020 EX-10.29

Third Amendment to Loan and Security Agreement, dated July 2, 2020, by and among BCSF Complete Financing Solution LLC, as Borrower, JPMorgan Chase Bank, National Association, as Administrative Agent and Wells Fargo Bank, National Association as Collateral Administrator, Collateral Agent, Securities Intermediary and Bank (incorporated by reference to Exhibit 10.29 to the Company’s Quarterly Report on Form 10-Q (File No. 814-01175), filed on August 5, 2020).

Exhibit 10.29 THIRD AMENDMENT TO LOAN AND SECURITY AGREEMENT This Third Amendment to the Loan and Security Agreement (this "Amendment"), dated as of July 2, 2020, is entered into among BCSF COMPLETE FINANCING SOLUTION LLC (the "Company"), as borrower; the Financing Providers party hereto; WELLS FARGO BANK, NATIONAL ASSOCIATION, in its capacity as collateral agent (in such capacity, the "Collateral

July 9, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): July 9, 2020 BAIN CAPITAL SPECIALTY FINANCE, INC.

July 9, 2020 EX-99.1

Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the Second Quarter Ended June 30, 2020

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Schedules Earnings Release for the Second Quarter Ended June 30, 2020 BOSTON – July 9, 2020 – Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the “Company”) announced today it will report its financial results for the second quarter ended June 30, 2020 on Wednesday, August 5, 2020 after market close. Management will host a conference call on Thur

June 18, 2020 CORRESP

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1095 Avenue of the Americas New York, NY 10036-6797 +1 212 698 3500 Main +1 212 698 3599 Fax www.

June 17, 2020 SC 13D/A

BCSF / Bain Capital Specialty Finance, Inc. / BAIN CAPITAL CREDIT MEMBER, LLC - SC 13D/A Activist Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D/A Under the Securities Exchange Act of 1934 (Amendment No. 9)* BAIN CAPITAL SPECIALTY FINANCE, INC. (Name of Issuer) Common Stock, par value $0.001 per share (Title of Class of Securities) 05684B107 (CUSIP Number) Michael Treisman Bain Capital Specialty Finance, Inc. 200 Clarendon Street, 37th Floor Boston, Massachusetts 02116

June 11, 2020 EX-99.1

Bain Capital Specialty Finance, Inc. Announces Final Results of Transferable Rights Offering

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Announces Final Results of Transferable Rights Offering BOSTON – June 11, 2020 – Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the “Company”, “our” or “we”) announced the final results of its transferable rights offering, which entitled holders of rights to purchase one new share of common stock for every four rights held at a subscription pric

June 11, 2020 8-K

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): June 10, 2020 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) DELAWARE 814-01175 81-2878769 (State or Other Jurisdiction of Incorporation)

June 8, 2020 EX-99.1

Bain Capital Specialty Finance, Inc. Announces Expiration of Transferable Rights Offering

Exhibit 99.1 Bain Capital Specialty Finance, Inc. Announces Expiration of Transferable Rights Offering BOSTON – June 8, 2020 – Bain Capital Specialty Finance, Inc. (NYSE: BCSF, the “Company”, “our” or “we”) announced the expiration of its transferable rights offering, which entitled holders of rights to purchase one new share of common stock for every four rights held at a subscription price of $1

June 8, 2020 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): June 5, 2020 BAIN CAPITAL SPECIALTY FINANCE, INC. (Exact name of Registrant as Specified in Its Charter) DELAWARE 814-01175 81-2878769 (State or Other Jurisdiction of Incorporation) (

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