English Premier League giant Manchester City has paid $2.25 million to a group of prominent Australian investors to take full ownership of A-League club Melbourne City.

According to documents lodged with the Australian Securities and Investments Commission last week, Manchester City now owns 100 per cent of its Melbourne club, having bought out minority owners Gerry Ryan, a BRW Rich List member and owner of caravan group Jayco, Crownbet chief executive Matthew Tripp, sports entrepreneur Bart Campbell and New Zealand businessman Michael Witt.

The quartet previously owned 20 per cent of Melbourne City under the terms of the deal struck in January 2013 as part of Manchester City's push to own several teams around the world.

Manchester City now owns 100 per cent of Melbourne City. Getty Images

Campbell and his consortium, which own NRL club Melbourne Storm, had led negotiations for the $11.25 million purchase of the club formerly known as Melbourne Heart.

Manchester City has effectively bought the quartet out for as much as they put into the original deal, having had an option to buy the 20 per cent shareholding at that valuation since the purchase.