Manchester United co-chairman Avram Glazer has put five million of his shares, with a value of around £70 million ($97m), up for sale.
United announced Glazer's decision on Thursday night, with the offering expected to run until Tuesday. With the current New York Stock Exchange valuation of $20.13 each per share it would mean he is in line to rake in $101m (£72m).
The sale, should it happen, would see the Glazers' ownership of the club drop from 78 per cent to 74.9% and it is understood the family has no plans to relinquish its ownership fully.