Sixth Street Specialty Lending(TSLX) - 2024 Q1 - Quarterly Results

Exhibit 99.1 K FIRST QUARTER 2024 EARNINGS RESULTS Sixth Street Specialty Lending, Inc. Reports First Quarter Results; Declares a Second Quarter Base Dividend Per Share of $0.46, and a First Quarter Supplemental Dividend Per Share of$0.06. NEW YORK — May 1, 2024 — Sixth Street Specialty Lending, Inc. (NYSE: TSLX, or the "Company") today reported net investment income of $0.59 per share and net income of$0.53 per share for the first quarter ended March 31, 2024. These results correspond to an annualized re ...