Robert J. Stanley - 28 May 2026 Form 4 Insider Report for Sixth Street Specialty Lending, Inc. (TSLX)

Reporting relationship: CEO, Director
Issuer ticker: TSLX
Reported as of: 28 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 29 May 2026, 16:30:15 UTC
Prior SEC filing: 20 Nov 2025
Source filing: View source filing
Reporting owner signature: /s/ Anton Brett, on behalf of Robert J. Stanley (A)

Key filing fact

Robert J. Stanley filed Form 4 for Sixth Street Specialty Lending, Inc. (TSLX) on 29 May 2026.

Key facts

This page summarizes Robert J. Stanley's Form 4 filing for Sixth Street Specialty Lending, Inc. (TSLX).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 29 May 2026, 16:30.

Change

Previous filing in this sequence was filed on 20 Nov 2025.
Current net transaction value: $0.

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 0001673990 Primary reporting owner

Stanley Robert J.

Relationship: CEO, Director
Address: C/O SIXTH STREET SPECIALTY LENDING, INC., 2100 MCKINNEY AVENUE, SUITE 1500, DALLAS
Signature: /s/ Anton Brett, on behalf of Robert J. Stanley (A)
Signature date: 29 May 2026

Reported non-derivative transactions

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

TSLX transaction

Common Stock

Other

Transaction value
Shares: +20,000
Change %: +512%
Price
Shares after: 23,907
Date: 28 May 2026
Ownership: See Footnote
Footnotes: F1, F2

TSLX holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 21,000
Date: 28 May 2026
Ownership: Direct

^* 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

Sixth Street Specialty Lending Advisers, LLC ("Advisers") directly holds 2,716,977 shares of common stock, $0.01 par value per share (the "Common Stock") of Sixth Street Specialty Lending, Inc. (the "Issuer"), including shares of Common Stock indirectly beneficially owned by the Reporting Person (through his limited partnership interest in TSL Equity Partners, L.P. ("TSL"), which is a member of Sixth Street Specialty Lending Advisers Holdings, LLC, which in turn is a member of Advisers). This transaction reflects the acquisition by a trust for the benefit of certain of the Reporting Person's family members of limited partnership interests in TSL from an existing limited partner. The number of shares of Issuer Common Stock reported as acquired reflects the Reporting Person's indirect beneficial ownership in the shares acquired through such limited partnership interest in TSL. In connection with the acquisition by the trust, the trust paid the transferors an aggregate of $344,200.

Footnote F2

Includes Reporting Person's indirect beneficial ownership of 3,907.27 Shares of the Issuer that Reporting Person previously reported as directly owned. Shares are held directly by Advisers.

SEC remarks

Pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, as amended, the Reporting Person states that this filing shall not be an admission that the Reporting Person is the beneficial owner of any of the securities reported herein as indirectly owned, and the Reporting Person disclaims beneficial ownership of such securities except to the extent of the Reporting Person's pecuniary interest therein. (A). Anton Brett is signing on behalf of Robert J. Stanley pursuant to a Power of Attorney dated November 18, 2025.