Alan Waxman - 05 Mar 2026 Form 4 Insider Report for Sixth Street Specialty Lending, Inc. (TSLX)

Role
Vice President
Signature
/s/ Anton Brett, attorney-in fact (A)
Issuer symbol
TSLX
Transactions as of
05 Mar 2026
Net transactions value
+$5,530,000
Form type
4
Filing time
09 Mar 2026, 16:19:13 UTC
Previous filing
19 Dec 2024
Next filing
11 Mar 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Waxman Alan Vice President C/O SIXTH STREET SPECIALTY LENDING, INC., 2100 MCKINNEY AVENUE, SUITE 1500, DALLAS /s/ Anton Brett, attorney-in fact (A) 09 Mar 2026 0001515132

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction TSLX Common Stock Purchase $1,846,000 +100,000 $18.46 100,000 05 Mar 2026 By Trust F1
transaction TSLX Common Stock Purchase $3,684,000 +200,000 +200% $18.42 300,000 06 Mar 2026 By Trust F2
holding TSLX Common Stock 2,714,266 05 Mar 2026 See Footnote F3
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
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 $18.38 to $18.525, inclusive. Mr. Waxman ("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.
F2 The price reported in Column 4 is a weighted average price. These Shares were purchased in multiple transactions at prices ranging from $18.28 to $18.635, inclusive. Reporting Person undertakes to provide to 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.
F3 Reporting Person previously reported his indirect pecuniary interest in 140,447.01 Shares. Shares are held directly by Sixth Street Specialty Lending Advisers, LLC ("Adviser"). Adviser is managed by Sixth Street Specialty Lending Advisers Holdings, LLC, the sole member of Adviser. Sixth Street Specialty Lending Advisers Holdings, LLC is managed by TSSP Holdco Management, LLC, which is managed by a board of directors, which is currently comprised of Reporting Person. Reporting Person is the CEO of TSSP Holdco Management, LLC.

Remarks:

Reporting Person disclaims beneficial ownership of these Shares, except to the extent of his pecuniary interest therein, and, pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, Reporting Person states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose. (A) Anton Brett is signing on behalf of Mr. Waxman pursuant to a Power of Attorney dated March 2, 2026, which is attached hereto as an exhibit. Exhibit List: Exhibit 24 Power of Attorney