The Koch family is a network of conservative and libertarian-leaning charitable foundations funded primarily by the oil billionaire family, including sons Charles Koch and David Koch of founder Fred C. Koch. Prominent entities include the Charles Koch Foundation, David H. Koch Charitable Foundation, and Koch Cultural Trust. The family is known for supporting free-market, libertarian, and conservative initiatives in academic and policy areas, think tanks, political advocacy, higher education, as well as cancer research, arts, and science. They have been involved in funding anti-climate science groups through vehicles like the Donors Capital Fund and have been linked to climate change denial efforts.