Form 4 for TSLX Sixth Street Specialty Lending, Inc.

Accepted 2026-05-29 16:30:15 ET · period of report 2026-05-28 · accession 0001193125-26-248443 · SEC index · Original document

Summary rows

Aggregated the way they appear in lists: one row per insider, transaction code and security table.

X	Filed	Traded	Ticker	Insider	Title	Type	Price	Qty	Owned	ΔOwn	Value
I	2026-05-29 16:30	2026-05-28	TSLX	Stanley Robert J.	CEO, Dir	J - Other	—	+20.0K	23.9K	+512%	—

Purchase Sale Sale after option exercise All abbreviations

Every reported transaction

#	Table	Security	Date	Code	A/D	Shares	Price	Owned after	Own	Exercise / expiry	Underlying	Footnotes
1	Common	Common Stock	2026-05-28	J	A	20,000	—	23,907.27	I See 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. (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. (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. (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.