Main Street Capital Corporation (MAIN) reported a 2% year-over-year increase in net investment income to $90.3 million for Q2 2026, supported by rising total investment income despite a 10% increase in expenses. The portfolio’s non-accrual investments remained low at 1.1% of fair value, signaling stable credit conditions amid broader economic uncertainty. MAIN’s proprietary investment rating system continues to guide active portfolio risk management. While leverage supports returns, elevated expenses highlight margin pressures common in BDCs exposed to below-investment-grade credits. Key watchpoints include expense control, credit cycle sensitivity, and valuation volatility under ASC 820 fair value standards.