Bain Capital Specialty Finance (BCSF) General Counsel buys 2,300 shares

Rhea-AI Filing Summary

Bain Capital Specialty Finance, Inc. General Counsel Sabrina Rusnak-Carlson reported an open-market purchase of common stock. She bought 2,300 shares at a price of $12.55 per share, bringing her directly held stake to a total of 9,560 common shares after this transaction.

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Rusnak-Carlson Sabrina

(Last) (First) (Middle)

200 CLARENDON STREET

(Street)

BOSTON MA 02116

(City) (State) (Zip)

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

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

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

3. Date of Earliest Transaction (Month/Day/Year)
03/03/2026

4. 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 Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	03/03/2026		P		2,300	A	$12.55	9,560	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	/s/Sabrina Rusnak-Carlson	03/03/2026
	** 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 4 (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.

FAQ

What insider transaction did BCSF report for Sabrina Rusnak-Carlson?

Bain Capital Specialty Finance, Inc. reported that General Counsel Sabrina Rusnak-Carlson purchased 2,300 shares of common stock. The open-market purchase was executed at a price of $12.55 per share, increasing her directly held ownership to 9,560 shares.

Was the BCSF insider transaction a purchase or a sale?

The BCSF insider transaction was a purchase. General Counsel Sabrina Rusnak-Carlson executed an open-market buy of 2,300 common shares, coded as a “P” transaction, which indicates a purchase in an open market or private transaction under Form 4 rules.

How many BCSF shares does Sabrina Rusnak-Carlson own after the transaction?

After the reported trade, Sabrina Rusnak-Carlson directly owns 9,560 shares of Bain Capital Specialty Finance, Inc. common stock. This total reflects her new balance following the open-market purchase of 2,300 shares disclosed in the Form 4 filing.

What price did Sabrina Rusnak-Carlson pay for BCSF common stock?

She paid an average price of $12.55 per share for Bain Capital Specialty Finance, Inc. common stock. The Form 4 identifies the transaction as an open-market purchase of 2,300 shares at that per-share price, increasing her directly held stake in the company.

What role does Sabrina Rusnak-Carlson hold at Bain Capital Specialty Finance, Inc.?

Sabrina Rusnak-Carlson serves as General Counsel at Bain Capital Specialty Finance, Inc. Her Form 4 filing reports a personal open-market purchase of the company’s common stock, reflecting insider activity by a senior legal executive with direct ownership of the reported shares.