Sixth Street Specialty Lending: All-Weather BDC That Has A Tough Bar To Clear

Sixth Street Specialty Lending, Inc. trades at a 1.0x P/NAV, down from 1.4x last year, yet remains the highest among externally managed BDCs.

TSLX's Q1 2026 NAV per share fell 4.5%, mainly due to conservative marks and sector-wide unrealized losses, not realized credit issues.

NII per share dropped ~20% in Q1, driven by depressed fee income, but fundamentals remain solid, and Q2 is expected to normalize.

I see TSLX as a long-term defensive BDC allocation, but the current premium is not justified for short- or medium-term returns.

Up until late 2025, Sixth Street Specialty Lending, Inc. (TSLX) was deemed as one of the most conservatively managed business development companies, or BDCs, that has an edge on keeping credit defaults distant from the books.