9. GAIL MILLER

$3.2 billion  SOURCE: Car dealerships AGE: 77 • RESIDENCE: Salt Lake City SELF-MADE SCORE:  Last fall, Miller and her family sold a majority stake in the NBA’s Utah Jazz for nearly $1.7 billion to tech billionaire Ryan Smith but retained a minority interest. Miller still runs the Larry H. Miller Group, which she cofounded with husband Larry (d. 2009) in 1979. It owns more than 60 car dealerships and 16 movie theaters; in January, it acquired nursing home chain Advanced Health Care Corporation for an undisclosed sum.