UnitedHealth Group, a diversified healthcare company, completed the acquisition of Equian, a healthcare payment firm, from New Mountain Capital, a private equity firm, for $3.2bn. UnitedHealth would likely merge Equian into its Optum health-services arm, a rapidly growing part of its business that caters to insurers, hospitals, and other healthcare companies. Equian would add to its array of offerings and help Optum branch out beyond health care since Equian has different types of insurers as clients as well.