Optum, Inc. is an American pharmacy benefit manager and health care provider. It has been a subsidiary of UnitedHealth Group since 2011. UHG formed Optum by merging its existing pharmacy and care delivery services into the single Optum brand, comprising three main businesses: OptumHealth, OptumInsight and OptumRx. In 2017, Optum accounted for 44 percent of UnitedHealth Group's profits and as of 2019, Optum's revenues have surpassed $100 billion. Also in early 2019, Optum gained significant media attention regarding a trade secrets lawsuit that the company filed against former executive David William Smith, after Smith left Optum to join Haven, the joint healthcare venture of Amazon, JPMorgan Chase, and Berkshire Hathaway. On January 15, 2019, Optum said that the revenue of the company had surpassed $100 billion for the first time, growing by 11.1% year over year to $101.3 billion. This also means that Optum will contribute more than 50% of UnitedHealth's 2020 earnings, making Optum UnitedHealth's fastest-growing unit.