https://www.8newsnow.com/news/local-...ll-the-mirage/
As is common with many casinos nowadays, the land and buildings of the Mirage are already owned by another company, and leased back to MGM, who continues to operate Mirage.
However, now they have announced they are in the early stages to sell operations, meaning it will no longer be an MGM property.
If you recall, Treasure Island, which is next door, was also once part of MGM, but was sold away to an independent owner.
Mirage, which opened in 1989, was the very first strip megaresort, and was the catalyst to the quick evolution of the strip in the '90s to become the new center for Vegas tourism. Prior to the '90s, downtown was considered the center of action in LV, and the strip was secondary. North strip properties like Las Vegas Hilton, Sahara, and Riviera were also more relevant at the time.
Mirage was originally built by Steve Wynn, and later sold to MGM. It was built on the site of the now-forgotten The Castaways hotel, which operated from 1963-1987, but was never considered a major player in Vegas.