M.D Sass Investors Services is an investment management firm based in New York, New York. The firm provides its services to financial institutions, state and local governments, endowment funds, foundations, investment companies, Taft-Hartley funds, pension and profit-sharing plans, and high net worth individuals. M.D. Sass Investors Services manages separate client-focused equity and fixed income portfolios along with mutual funds, hedge funds, private equity funds, and funds of funds. Founded in 1972, the firm invests in the public equity, fixed income, and alternative investment markets of the United States.