Main Street Capital (NYSE:MAIN) has made a name for itself in keeping costs low in an industry where compensation is lofty.

Low costs aren't its only advantage. Main Street Capital has also proven itself as a stellar underwriter and investor. Some of its best investments are delivering dividend payments equal to double their historical valuations, year after year.

Along the way, their robust growth has also led to excellent growth in the company's underlying book value. In the future, its best portfolio companies could reward shareholders with highly valued exits, resulting in big special dividends.

In the following video, Motley Fool Financials Bureau Chief David Hanson and Fool contributor Jordan Wathen discuss three of the best-performing assets on Main Street Capital's balance sheet.