Bill DeWitt Jr. amassed his fortune through a combination of inherited business acumen from his baseball-executive father, successful private equity investments, and strategic entrepreneurial ventures. He founded Reynolds, DeWitt & Co., an investment firm with diverse holdings ranging from commercial real estate and business enterprises to fast-food franchise operations like Arby's. These diverse financial successes, combined with his astute acquisition and ownership of the St. Louis Cardinals, solidified his multi-billion-dollar net worth.