David Koch was an American businessman and philanthropist, best known for his role as co-owner of Koch Industries, one of the largest privately held companies in the United States. Born on May 3, 1940, he was the youngest of four brothers in the Koch family, which has a significant influence in various industries, including oil, chemicals, and manufacturing. In addition to his business endeavors, David Koch was a prominent supporter of various charitable causes, particularly in the fields of education, health, and the arts. He was involved with organizations such as the American Museum of Natural History and the Lincoln Center for the Performing Arts. David Koch passed away on August 23, 2019.