Amazon.com Inc. AMZN, -1.78% , Berkshire Hathaway Inc. BRK.A, +0.36% [S: brk.b] and JPMorgan Chase & Co. JPM, -0.21% , three of the biggest companies in the U.S., announced plans on Tuesday to start a separate company with the goal of improving health care for their U.S. employees. The company will be "free from profit-making incentives and constraints," focusing in the beginning on technology solutions, and will initially be led by Todd Combs, an investment officer at Berkshire Hathaway, Marvelle Sullivan Berchtold, a managing director at JPMorgan Chase; and Beth Galetti, a senior vice president at Amazon. Berkshire Hathaway Chairman and Chief Executive Warren Buffett described increasing health care costs as "a hungry tapeworm on the American economy" in a statement, adding that the three companies do "not come to this problem with answers. But we also do not accept it as inevitable. Rather, we share the belief that putting our collective resources behind the country's best talent can, in time, check the rise in health costs while concurrently enhancing patient satisfaction and outcomes." Amazon shares have surged 27.6% over the last three months, Berkshire Hathaway Class A shares have surged 8.7% and JPMorgan shares have surged 14.6%, compared with a 10.9% rise in the S&P 500 SPX, -1.11% and a 13.2% rise in the Dow Jones Industrial Average DJIA, -0.87% .