TSLX (TSLX) officer purchases 1,000 shares in open-market buy

Rhea-AI Filing Summary

Sixth Street Specialty Lending, Inc. officer Michael Graf reported an open-market purchase of the company's common stock. On the transaction date, he bought 1,000 shares at a price of $18.26 per share, increasing his direct holdings.

After this transaction, Graf directly owned a total of 7,204.7286 shares of common stock. This total includes shares that were issued to him through the company’s dividend reinvestment plan as of the date of the filing, reflecting both his purchase and accumulated reinvested dividends.

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

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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^*

Graf Michael

(Last) (First) (Middle)

C/O SIXTH STREET SPECIALTY LENDING, INC.

2100 MCKINNEY AVENUE, SUITE 1500

(Street)

DALLAS TX 75201

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Sixth Street Specialty Lending, Inc. [ TSLX ]

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	See Remarks

3. Date of Earliest Transaction (Month/Day/Year)
02/26/2026

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	02/26/2026		P		1,000	A	$18.26	7,204.7286(1)	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:

1. Includes shares issued pursuant to the Issuer's dividend reinvestment plan as of the date of this filing.

Remarks:

Title: Vice President / Principal Accounting Officer / Deputy Chief Financial Officer (2) Anton Brett is signing on behalf of Michael Graf pursuant to a Power of Attorney dated August 8, 2024.

	/s/ Anton Brett, attorney-in fact (2)	03/02/2026
	** 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 Michael Graf report for TSLX?

Michael Graf reported buying 1,000 shares of Sixth Street Specialty Lending common stock in an open-market transaction at $18.26 per share. This increased his direct ownership stake and reflects a net purchase, not a sale, based on the disclosed Form 4 data.

At what price did the TSLX officer purchase shares in this Form 4?

The officer purchased Sixth Street Specialty Lending common shares at $18.26 per share. This price reflects the transaction’s weighted purchase cost in the open market, as disclosed, and forms the basis for calculating the total dollar value of this reported insider buy.

How many TSLX shares does Michael Graf own after this transaction?

After the reported purchase, Michael Graf directly owns 7,204.7286 shares of Sixth Street Specialty Lending common stock. This figure includes shares issued to him under the company’s dividend reinvestment plan as of the filing date, in addition to his newly purchased shares.

Does the TSLX Form 4 include dividend reinvestment plan shares?

Yes. The Form 4 notes that the total shares reported for Michael Graf include shares issued under Sixth Street Specialty Lending’s dividend reinvestment plan. This means his reported ownership combines reinvested dividends with shares obtained through the recent open-market purchase.

Was the TSLX insider transaction a purchase or a sale?

The transaction was a purchase. The Form 4 identifies the code as “P” and describes it as an open-market purchase, with 1,000 shares acquired and no reported sales, resulting in a net-buy position for the reporting officer in this filing.