Bain Capital Specialty Finance officer files Form 3 with 7,260 shares

Rhea-AI Filing Summary

Bain Capital Specialty Finance (BCSF) filed an initial Form 3 disclosing insider holdings. Reporting person Sabrina Rusnak-Carlson, an officer serving as General Counsel, reported beneficial ownership of 7,260 shares of common stock held directly. The stated Date of Event was 11/05/2025. No derivative securities were listed in Table II.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Rusnak-Carlson Sabrina

Role General Counsel

Type	Security	Shares	Price	Value
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 7,260 shares (Direct)

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Accepted by SEC EDGAR 11/06/2025 - 05:09 PM Learn about SEC filing dates

FAQ

What did BCSF (BCSF) report in this filing?

An initial Form 3 disclosing insider beneficial ownership by an officer.

How many BCSF shares were reported as beneficially owned?

7,260 shares of common stock.

Is the ownership direct or indirect?

The shares are held directly by the reporting person.

Who is the reporting person and their relationship to BCSF?

Sabrina Rusnak-Carlson, an officer serving as General Counsel.

Were any derivative securities reported?

No. Table II listed no derivative securities.

What is the Date of Event on the Form 3?

The Date of Event is 11/05/2025.

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

Rusnak-Carlson Sabrina

(Last) (First) (Middle)

200 CLARENDON STREET

(Street)

BOSTON MA 02116

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
11/05/2025

3. Issuer Name and Ticker or Trading Symbol
Bain Capital Specialty Finance, Inc. [ BCSF ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	General Counsel

5. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	7,260	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	/s/ Sabrina Rusnak-Carlson	11/06/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.