Threecorporategiants disbandhealthcareplan UnitedHealthtopay nearly$8Bforcompany

Haven, a joint venture formed by Amazon, Berkshire Hathaway and JPMorgan Chase to explore newways to deliver health care to their employees, is disbanding, according to a statement on its website.

Haven will cease operations at the end of February — three years after its arrival sent shock waves through the health care industry. It is a quiet end to a collaboration between an online retail giant, the holding company led by billionaire investorWarren Buffett and the largest U.S. bank. Two people familiar with the collaboration said logistical hurdles had made it harder than expected to come up with ideas thatmade sense for all three companies.

UnitedHealth Group will spend nearly $8 billion in cash to add a health care technology company to its growing Optum business.

UnitedHealth saidWednesday that it will add Change Healthcare to its OptumInsight segment and boost its ability to provide data analytics and revenue cycle management support, among other offerings.

Minnetonka, Minnesota-basedUnitedHealth brings in most of its revenue through a health insurance business that covers about 48 million people. But its Optum segment generates bigger profit margins and provides a growing portion of the company’s operating earnings.

That business runs surgery centers, clinics and one of the nation’s largest pharmacy benefit management operations. It also provides technology services and support.