AllianceBernstein Holding L.P. (AB) is one of the leading global investment management firms that offers high-quality research and diversified investment services to institutional clients, individuals and private clients in major markets across the world. Its client base includes investors across the Americas, Australia, Asia, Europe and Africa. The key services of the company include Institutional Investment Services, Retail Services, Private Client Services and Institutional Research Services. As of December 2008, the company had 325 research analysts, located around the world, supporting its 171 portfolio managers, 44 traders and 31 professionals with other investment-related responsibilities. AB operates in 48 cities across 25 countries. The company is headquartered at New York in the US.