Alfred Pritchard Sloan, Jr. was very wealthy. One of the nation’s first corporate executive success stories, Sloan became rich not through inventiveness, but through earning a salary and receiving stock options. His GM shares made him one of the world’s richest men. By the time he was 90, he’d given hundreds of millions of dollars to further medical research and technology through his eponymous philanthropic foundation while still retaining a personal fortune of a quarter-billion dollars.