As of December 2025 Main Street Capital has a market cap of โฌ4.76 Billion. This makes Main Street Capital the world's 2886th most valuable company by market cap according to our data. The market capitalization, commonly called market cap, is the total market value of a publicly traded company's outstanding shares and is commonly used to measure how much a company is worth.
On Dec 8th, 2025 the market cap of Main Street Capital was reported to be: