Main Street Capital Corp. has announced it has sold the majority of its equity interest in Laurus Healthcare.

Main Street realized a gain of approximately $9.9 million on the sale to an undisclosed private equity firm.

Laurus develops, acquires and manages hospitals and surgery centers through physician partnerships in Texas. Main Street initially invested in Laurus in 2004.

Main Street, based in Houston, describes itself as a principal investment firm that provides long-term debt and equity capital to lower middle market companies and debt capital to middle market companies.