
Net Worth Over Time
Net Worth Timeline
Joins Koch Industries
Koch joins Koch Industries, marking his entry into the family business.
President Koch Engineering
Became president of Koch Engineering, increasing his influence and wealth within the company.
Co-owner of Koch Industries
Became co-owner of Koch Industries, solidifying his position and significantly increasing his net worth.
Philanthropic Contributions Increase
Increased his philanthropic contributions, becoming known for his support of various causes.
Political Activism Prominent
Became a prominent figure in political activism, using his wealth to support conservative causes.
Retires from Koch Industries
Retired from Koch Industries, stepping down from his executive role due to health concerns.
Death of David Koch
David Koch passed away, leaving a significant legacy in business, philanthropy, and politics.
Political Influence Lingers
Koch's influence on political and philanthropic landscapes remains. While the Koch brothers' business empire continues to dominate energy, recent controversies have tarnished their image.
Last updated: February 25, 2026