Investor Presentation Fourth Quarter – 2025 Main Street Capital Corporation NYSE: MAIN mainstcapital.com www.mainstcapital.com Main Street Capital Corporation NYSE: MAIN mainstcapital.com Page 1 Disclaimers Main Street Capital Corporation (MAIN) cautions that statements in this presentation that are forward-looking, and provide other than historical information, involve risks and uncertainties that may impact our future results of operations. The forward-looking statements in this presentation are based on ...