The massive joint venture between Amazon, JPMorgan Chase and Berkshire Hathaway suffered from a poorly defined mission, strategic blunders and a failure to show measurable progress, Stat says. Modern Healthcare: Amazon, JPMorgan Chase, Berkshire Hathaway Disband Haven Haven is ending about three years after Amazon, JPMorgan Chase and Berkshire Hathaway set out to improve outcomes and lower costs for their employees, the companies announced Monday. The independent company "free from profit-making incentives and constraints" aimed to improve employee satisfaction and reduce healthcare costs for Amazon, JPMorgan and Berkshire's around 1 million U.S. employees, but executives shared little detail about the joint venture. Haven will cease operations at the end of February, according to its website.