Elizabeth Uihlein

She and her husband, Dick (No. 285), have funneled more than $190 million into conservative politics since the 1990s, including more than $40 million to 2022 midterm races. Their wealth comes from $6.1 billion (est. revenue) Uline—a play on their last name—which sells more than 40,000 business-supply products, including boxes and bubble wrap, via an 800-plus-page catalog. Dick, an heir to the Schlitz beer fortune, and Elizabeth started Uline together in their basement in 1980. They are CEO and president, respectively.