The Koch Family – $98.7 Billion
Over eight decades ago, David and Charles Koch’s father, Fred C. Koch, successfully expanded their family’s oil refinery firm into Koch Industries. Over the years after David and Charles took over, the brothers have weathered everything from bad press to their other brothers’, Frederick and William, failed takeover. It’s all been worth it, however, as today Koch Industries generates over $100 billion in annual revenue.
Unfortunately, in 2019, David passed away, leaving his brother in charge. As a result, Charles has pledged to contribute over $1.2 billion to Cancer research. Not only that, but he also wants to contribute to hospitals, education, and cultural institutions through his foundation, the Charles Koch Foundation.