S tewart Rahr is a flamboyant and often controversial American billionaire who made his fortune in the pharmaceutical distribution business. He inherited a small family-owned pharmacy in Brooklyn from his father, and over several decades, transformed it into Kinray, a massive and highly profitable private pharmaceutical wholesaler. He built the business by focusing on serving independent pharmacies in the New York metropolitan area, offering them deep discounts and a wide range of products.

Known for his aggressive business tactics and his larger-than-life, self-promoting personality, Rahr sold Kinray to the healthcare giant Cardinal Health in 2010 for $1.3 billion. This all-cash deal made him a billionaire. Since the sale, he has become a high-profile philanthropist through his Rahr Foundation, giving away hundreds of millions of dollars to various causes, particularly in healthcare and for Jewish charities. He is also famous for his celebrity friendships and his over-the-top, attention-seeking behavior, which has earned him the nickname "Stewie Rah Rah, the Number One King of All Fun."