But it comes after he said he had no interst in buying more shares.
Rangers supporters expect the Newcastle Utd owner to rename Ibrox after he bought the naming rights for ONE POUND.
The Sports Direct founder emerged as the mystery buyer behind the purchase of a 5.23 per cent stake which was completed on his behalf by Paris-based BNP Paribas Arbitrage SNC.
Ashley's move comes weeks after he stated to the London Stock Exchange that he was not taking part in a share offer which was open to all existing Rangers shareholders.
Ashley bought his latest batch of shares for 20p each – the same price at which they were on sale for in the open offer.
Speculation surrounding his intentions for Rangers, and the possible problems caused by football rules regarding influence at more than one club, forced Ashley to reaffirm his commitment to Newcastle last month.