---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-25-061026"
form_type: "8-K"
ticker: "TSLX"
cik: "0001508655"
company_name: "Sixth Street Specialty Lending, Inc."
filed_at: "2025-04-30T23:59:59+00:00"
generated_at: "2026-05-23T02:16:08.394665+00:00"
event_type: "earnings"
sentiment: "neutral"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# TSLX Q1 NII $0.62/sh, adj NII $0.58; declares $0.46 base + $0.06 supplemental dividend

## Summary
- Net investment income $58.0M ($0.62/sh); net income $37.0M ($0.39/sh).
- Adjusted NII $54.3M ($0.58/sh); adjusted NI $33.3M ($0.36/sh).
- Q2 base dividend $0.46/sh (record June 16, payable June 30); Q1 supplemental $0.06/sh (record May 30, payable June 20).
- Issued $300M unsecured 2030 notes; swapped to SOFR+153 bps; credit facility amended, maturity extended to 2030.
- NAV per share $17.04 vs $17.16 at Dec 2024; portfolio 92.9% first-lien, 97.0% floating rate.

## SEC filing metadata
- accession: 0000950170-25-061026
- form_type: 8-K
- ticker: TSLX
- cik: 0001508655
- company_name: Sixth Street Specialty Lending, Inc.
- filed_at: 2025-04-30T23:59:59+00:00
- event_type: earnings
- sentiment: neutral
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 2.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1508655/000095017025061026/0000950170-25-061026-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1508655/000095017025061026/tslx-20250430.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-25-061026
- JSON: https://secwatch.observer/filing/0000950170-25-061026.json
- Plain text: https://secwatch.observer/filing/0000950170-25-061026.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.