The Koch Brothers, Charles and David Koch, are American businessmen known for their significant influence in politics and business. They co-own Koch Industries, one of the largest privately held companies in the United States, which operates in various sectors, including oil, chemicals, and consumer products. Their wealth and business interests have made them prominent figures in the American political landscape. The Koch Brothers are also known for their extensive funding of political campaigns and think tanks that promote free-market policies and limited government. Through their philanthropic efforts, they support various causes, including education and public policy research, often aligning with their libertarian beliefs.