Wynn's public divorce from ex-wife Elaine Wynn in 2009 led to an expensive settlement, which included the transfer of $741 milion worth of company stock to her.
Last week, Elaine Wynn, who sits on the company's board, sued so she could sell her shares, saying she wanted to support charities.
Wynn has long supported charities himself, including a program called Communities in Schools, based in Virginia, which provides community services to the public school system.
Wynn's isn't the only casino to give something back. Since 2010, Caesars Foundation has donated more than $17 million to organizations across the U.S., including $1 million to Las Vegas' Opportunity Village, which benefits people with intellectual disabilities, according to the Associated Press.