The top 50 billionaire inventors

John R. Menard – Estimated Net Worth Today: $17.4B.

John Menard is the founder and owner of Menards, a home improvement retailer with over 300 stores, spanning from Wyoming to Ohio.

Menards is estimated to bring in approximately $13 billion in annual sales and competes with major home improvement retailers.

Known for his hands-on approach to management, Menard maintains tight control over his business operations, requiring even top executives to clock in every morning.

Mr. Menard sponsored the winning car at the 2019 Indy 500, his first win in nearly 40 years of involvement in racing.