TSLX (NYSE: TSLX) director David Stiepleman buys 20,200 company shares

Rhea-AI Filing Summary

Sixth Street Specialty Lending, Inc. director and vice president David Stiepleman reported an open-market purchase of 20,200 shares of common stock on March 2, 2026 at a weighted average price of $17.65 per share. Following this transaction, he directly holds 25,735 shares of common stock.

The filing also notes 5,544.11 shares held indirectly through entities for which Mr. Stiepleman has pass-through voting power and no dispositive power. The purchased shares were acquired in multiple trades within a narrow price range between $17.64 and $17.665.

Insider Trade Summary

Net Buyer: 20,200 shares ($356,530)

Net Buy 2 txns

Insider Stiepleman David

Role Vice President

Bought 20,200 shs ($357K)

Type	Security	Shares	Price	Value
Purchase	Common Stock	20,200	$17.65	$357K
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 25,735 shares (Direct); Common Stock — 5,544.11 shares (Indirect, See Footnote)

Footnotes (1)

1. The price reported in Column 4 is a weighted average price. These shares of common stock, par value $0.01 per share (the "Shares") were purchased in multiple transactions at prices ranging from $17.640 to $17.665, inclusive. The reporting person undertakes to provide to Sixth Street Specialty Lending, Inc. (the "Issuer"), any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Shares purchased at each separate price within the range set forth above. Held indirectly through entities for which Mr. Stiepleman has pass through voting power and no dispositive power.

Form 4 Insider Transactions: What Each Field Means →

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^*

Stiepleman David

(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)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Vice President

3. Date of Earliest Transaction (Month/Day/Year)
03/02/2026

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	03/02/2026		P		20,200	A	$17.65(1)	25,735	D
Common Stock								5,544.11	I	See Footnote(2)

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. The price reported in Column 4 is a weighted average price. These shares of common stock, par value $0.01 per share (the "Shares") were purchased in multiple transactions at prices ranging from $17.640 to $17.665, inclusive. The reporting person undertakes to provide to Sixth Street Specialty Lending, Inc. (the "Issuer"), any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of Shares purchased at each separate price within the range set forth above.

2. Held indirectly through entities for which Mr. Stiepleman has pass through voting power and no dispositive power.

Remarks:

(3) Anton Brett is signing on behalf of David Stiepleman pursuant to a Power of Attorney dated March 3, 2026, which is attached hereto as an exhibit. Exhibit List: Exhibit 24 Power of Attorney

	/s/ Anton Brett, attorney-in-fact (3)	03/04/2026
	** 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 TSLX director David Stiepleman report?

David Stiepleman reported buying 20,200 shares of Sixth Street Specialty Lending common stock. The shares were purchased in the open market at a weighted average price of $17.65 per share, reflecting multiple individual trades within a narrow price range on March 2, 2026.

At what price did David Stiepleman buy TSLX shares on March 2, 2026?

He bought the shares at a weighted average price of $17.65 per share. The filing explains the purchases occurred in multiple transactions at prices ranging from $17.64 to $17.665, and detailed trade breakdowns are available upon request from the company or regulators.

How many TSLX shares does David Stiepleman own after this Form 4 transaction?

After the reported transaction, he directly owns 25,735 shares of common stock. The filing also shows 5,544.11 additional shares held indirectly through entities where he has pass-through voting power but no dispositive power over those indirectly held shares.

Was the March 2, 2026 TSLX Form 4 transaction a purchase or sale?

The Form 4 reports an open-market purchase of TSLX shares. Specifically, director and vice president David Stiepleman bought 20,200 shares of common stock, and there were no reported sales in this filing, based on the transaction summary details provided.

How are some of David Stiepleman’s TSLX shares held indirectly?

A portion of his holdings is held indirectly through entities for which he has pass-through voting power. The filing notes he has no dispositive power over these indirectly held shares, which total 5,544.11, distinguishing them from his directly owned common stock.

What does the weighted average price mean in the TSLX insider purchase?

The weighted average price of $17.65 reflects many individual trades executed between $17.64 and $17.665. The company states it can provide full information on the number of shares purchased at each separate price within that range to shareholders or regulators upon request.