TSG Equity Partners is an investment firm in Massachusetts that provides growth and acquisition financing to lower middle-market companies. Founded 1996 in Stow, Massachusetts, United States, this private equity firm invests in early stage ventures. It usually funds Series A, Series B and venture rounds. Its portfolio companies include SolarOne Solutions, Optasite, Marketmax Inc., aMedia, and LatinForce.Net. As of February 2020, TSG Equity Partners has made six investments. Their most recent investment was on Apr 22, 2008 with SolarOne Solutions. TSG Equity Partners has had one exit, which was Marketmax Inc.