The Mustang Group is a Boston-based private equity firm focusing on middle market companies with revenues between $5 million and $100 million. They offer a range of capital and liquidity options to company owners, from growth capital to full liquidity solutions, typically investing in Series B rounds.

Notable portfolio companies include Crowdtap and Suzy, both of which have raised $5 million each. The firm's investment strategy centers on providing flexible financing options tailored to the needs of mid-market businesses, supporting their growth and development in the competitive private equity landscape.