David Stiepleman - 02 Mar 2026 Form 4 Insider Report for Sixth Street Specialty Lending, Inc. (TSLX)

Reporting relationship: Vice President, Director
Issuer ticker: TSLX
Reported as of: 02 Mar 2026
Net transaction value: +$356,530
SEC form: 4
Accepted by SEC: 04 Mar 2026, 16:05:15 UTC
Prior SEC filing: 29 Aug 2022
Source filing: View source filing
Reporting owner signature: /s/ Anton Brett, attorney-in-fact (3)

Key filing fact

David Stiepleman filed Form 4 for Sixth Street Specialty Lending, Inc. (TSLX) on 04 Mar 2026.

Key facts

This page summarizes David Stiepleman's Form 4 filing for Sixth Street Specialty Lending, Inc. (TSLX).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 04 Mar 2026, 16:05.

Change

Previous filing in this sequence was filed on 29 Aug 2022.
Current net transaction value: +$356,530.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001515134 Primary reporting owner

Stiepleman David

Relationship: Vice President, Director
Address: C/O SIXTH STREET SPECIALTY LENDING, INC., 2100 MCKINNEY AVENUE, SUITE 1500, DALLAS
Signature: /s/ Anton Brett, attorney-in-fact (3)
Signature date: 04 Mar 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

TSLX transaction

Common Stock

Purchase

Transaction value: $356,530
Shares: +20,200
Change %: +365%
Price: $17.65
Shares after: 25,735
Date: 02 Mar 2026
Ownership: Direct
Footnotes: F1

TSLX holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 5,544
Date: 02 Mar 2026
Ownership: See Footnote
Footnotes: F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

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.

Footnote F2

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

SEC 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