According to Sky News, conglomerate HNA Group, which owns Hainan Airlines, is in talks to buy a minority stake and has hired bankers to help facilitate a possible deal.
However, Monarch owner Greybull Capital poured cold water on the rumours of a possible sale.
"In order to review relevant options thoroughly, Monarch has sought the assistance of Deutsche Bank who will look at both inbound and outbound opportunities," a spokesperson for Greybull Capital told Sky News.
"We confirm there is no sale process."