Senator Investment Group is a hedge fund firm in New York that focuses on providing services to pooled investment vehicles. Founded 2008 in New York, United States by Douglas Silverman and Alexander Klabin, it invests in series E, series I, series F, series C and series B rounds. Its portfolio companies include Auris Health, Lyft, Ginkgo Bioworks, Adaptive Biotechnologies, and IEX Group. As of April 2020, Senator Investment Group has made five investments. Their most recent investment was on November 28, 2018, when Auris Health raised $220M. Senator Investment Group has had three exits, the most notable of which include Adaptive Biotechnologies, Lyft, and Auris Health.