David H. Koch

David Hamilton Koch (; May 3, 1940 – August 23, 2019) was an American businessman, philanthropist, political activist, and chemical engineer. He joined the family business Koch Industries. He became president of the subsidiary Koch Engineering in 1979. He became a co-owner of Koch Industries, with older brother Charles, in 1983. He was an executive vice president.
On June 5, 2018, the company announced his retirement from the company due to declining health issues.
Koch died at his Southampton, New York home from prostate cancer on August 23, 2019 at the age of 79.