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 510, 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)

(Commission

File Number)

(IRS Employer

Identification No.)

200 Clarendon Street

37th Floor

Boston, Massachusetts

02116

(Address of Principal Executive Offices)

(Zip Code)

Registrant’s Telephone Number, Including Area Code: (617) 516-2000

N/A

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class		~~Trading Symbol~~TradingSymbol(s)		Name of each exchange on which registered
Common Stock, par value $0.001 per share		BCSF		New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 52.02. ~~Departure~~Results of ~~Directors~~Operations orand ~~Certain~~Financial ~~Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers~~Condition.

On November 510, 2025, ~~the Board of Directors (the “Board”) of~~ Bain Capital Specialty Finance, Inc. (the “Company”) ~~appointed~~issued ~~Sabrina~~a ~~Rusnak-Carlson,~~press ~~46,~~release asannouncing ~~General~~its ~~Counsel~~financial ofresults ~~the~~for ~~Company effective as of~~ the ~~close~~third ofquarter ~~business~~ended ~~on November~~September 530, 2025. ~~Ms. Rusnak-Carlson~~A ~~will~~copy ~~serve until her successor is duly appointed and qualified or until her earlier resignation or removal. Ms. Rusnak-Carlson joined Bain Capital in 2025. Ms. Rusnak-Carlson is the General Counsel~~ of ~~Credit and Public Equity. Prior to joining Bain Capital, Ms. Rusnak-Carlson was~~ the ~~General~~press ~~Counsel~~release ofis ~~First~~attached ~~Eagle~~hereto ~~Alternative~~as ~~Credit~~Exhibit ~~(formerly THL Credit) and prior thereto a Partner in the Private Credit Group of Proskauer Rose LLP~~99. Ms1. ~~Rusnak-Carlson~~ earned a Bachelor of Science with honors from the McDonough School of Business at Georgetown University, with a minor in international marketing and Spanish. Ms. Rusnak-Carlson also holds a Juris Doctor from Boston University School of Law.

~~Ms. Rusnak-Carlson~~The ~~has~~information noin ~~family~~Item ~~relationships~~2.02 ~~with~~of ~~any~~this ~~current~~Current ~~director~~Report on Form 8-K, ~~executive~~including ~~officer~~Exhibit 99.1 furnished herewith, oris ~~person~~being ~~nominated~~furnished toand ~~become~~shall anot ~~director~~be ordeemed ~~executive~~“filed” ~~officer~~for any purpose of Section 18 of the ~~Company,~~Securities ~~and~~Exchange ~~there~~Act isof no1934, ~~arrangement~~as oramended ~~understanding~~(the ~~under~~“Exchange ~~which~~Act”), ~~Ms. Rusnak-Carlson~~or ~~was~~otherwise ~~appointed~~subject asto the ~~Company’s~~liabilities ~~General~~of ~~Counsel~~such Section. ~~There~~The ~~are~~information noin ~~transactions~~this orCurrent ~~proposed~~Report ~~transactions~~on toForm ~~which~~8-K ~~the~~shall ~~Company~~not isbe adeemed ~~party,~~to orbe ~~intended~~incorporated toby bereference ainto ~~party,~~any infiling ~~which~~under ~~Ms. Rusnak-Carlson~~the ~~has~~Securities Act of 1933, as amended, or ~~will~~the ~~have~~Exchange Act, aexcept ~~material~~as ~~interest~~shall ~~subject~~be toexpressly ~~Item~~set ~~404(a)~~forth ofby ~~Regulation~~specific ~~S-K~~reference in such filing.

Item 98.01. ~~Financial~~Other ~~Statements and Exhibits~~Events.

~~(d)~~On ~~Exhibits~~November 10, 2025, the Company issued a press release announcing the declaration of a fourth fiscal quarter 2025 dividend of $0.42 per share and an additional dividend of $0.03 per share that was previously announced on February 27, 2025. The fourth fiscal quarter 2025 dividend of $0.42 per share and the additional dividend of $0.03 per share are for stockholders of record as of December 16, 2025 and payable on December 30, 2025. A copy of the press release is attached hereto as Exhibit 99.1.

Exhibit No.		Description
104		Cover Page Interactive Data File (embedded within the Inline XBRL document).

Item 9.01

Financial Statements and Exhibits.


99.1		Press Release, dated November 10, 2025.

104		Cover page interactive data file (formatted as Inline XBRL)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	BAIN CAPITAL SPECIALTY FINANCE, INC.
Date: November 6, 2025	By:	/s/ Adriana Rojas Garzón
Date: November 10, 2025	By:	/s/ Adriana Rojas Garzón
	Name:	Adriana Rojas Garzón
	Title:	Vice President

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