Liverpool's owner, the Boston-based Fenway Sports Group (FSG), is prepared to sell its controlling stake in the club, sources have told ESPN, 12 years after buying the six-time Champions League winners for just £300 million.

As first reported by The Athletic, FSG has enlisted investment banks Goldman Sachs and Morgan Stanley to assist in the process of finding a potential buyer. Sources familiar with the situation have told ESPN that an information memorandum detailing the possible sale was sent to potential investors last month.

Sources also added that while FSG is inviting offers and prepared to offload its complete holding in the club, the Liverpool owner is also ready to consider offers of outside investment.

According to sources, Liverpool's valuation could exceed £4 billion because of the club's trophy-winning history, global fan base and commercial value.

In a statement, FSG said: "There have been a number of recent changes of ownership and rumours of changes in ownership at EPL clubs, and inevitably we are asked regularly about Fenway Sports Group's ownership in Liverpool.