New Mountain Finance Corporation is a business development company specializing in private equity, buyouts, and lending directly to middle market companies in industries with "defensive growth". Its investment preferences include middle market companies, buyout firms, debt securities, equity interests, etc., with its target sectors in energy, education services, health care technology, security and alarm services, among others. The company invests between $10 million and $50 million per transaction, seeking a majority stake in its portfolio companies.