MSC Income Fund (MSIF) is an externally managed Business Development Company (BDC) that lends to private, middle-market U.S. companies. MSIF's core strategy is originating first lien, floating-rate senior secured loans to companies owned or being acquired by private equity firms, primarily to support leveraged buyouts, acquisitions, and recapitalizations. Target borrowers typically have revenues of $25M–$500M and EBITDA of $7.5M–$50M, and individual loans generally range from $1M to $30M. MSIF is managed by MSC Adviser I, a subsidiary of Main Street Capital, a publicly listed BDC; MSIF has no employees of its own. The portfolio is divided into two meaningful segments: a private loan portfolio (~60% of fair value) of senior secured loans to PE-backed companies, and a legacy Lower Middle Market (LMM) portfolio (~37%) of combined debt and equity investments in smaller companies, historically co-invested alongside Main Street. MSIF stopped making new LMM platform investments upon its NYSE listing in January 2025, and is rotating that capital into private loans as LMM positions are exited. MSIF earns income through interest on floating-rate debt, dividends from LMM equity positions, and origination fees. Key earnings drivers include portfolio size, leverage, and SOFR levels. A significant near-term catalyst is the expansion of MSIF's regulatory leverage limit in January 2026, which is expected to add roughly $250M in additional borrowing capacity. MSIF is structured as a RIC and distributes at least 90% of taxable income to shareholders via quarterly regular and supplemental dividends.