The casino’s gaming floor is 80 percent Multimedia machines, and the company gets a portion of the net wins generated by the machines. For those who aren’t, the casino is operated by Multimedia Games, a company that owns the nearby WinStar Park. You’ll recognize some of the casino’s names and logos if you’re familiar with the Chickasaw Nation or the Dallas Cowboys. If you’re wondering who owns Winstar Casino, you’ve come to the right place. The net income from WinStar and all other enterprises operated by the Chickasaw Nation assists in funding vital services for the people of the Chickasaw Nation, including health care, education, transportation, and assistance for the elderly, children, and families. The Chickasaw Nation is the owner and operator of WinStar World Casino and Resort. Multimedia Games Who Owns Winstar Casino?.