Bill Gates keeps his spot as number two richest, followed by luxury goods tycoon Bernard Arnault, who nudged out Warren Buffett to move into the number three spot for the first time. Alice Walton, an heir to the Walmart fortune, is the richest woman, ranked No.9 at $54.4 billion. Altogether 241 women made the list, including 7 who share a fortune with a spouse, sibling or child.