The Qatari billionaire pulled out of the race to buy the Red Devils from the Glazer family after becoming frustrated with the process.
Sir Jim Ratcliffe's INEOS group is now primed to buy a 25 percent minority stake in the club, leaving the Glazer family as the majority owners.
Most Manchester United fans have called for a change of ownership, having grown increasingly frustrated over the way the club is being run by the Glazers.
The Glazers have been in charge since 2005.
“It would be wildly optimistic to think the Glazers are acting in the interests of supporters or are making ownership decisions which don’t centre on their own priorities,” a MUST statement read.
“However, what supporters should expect at the very least now is some clarity and an end to this process.
“Furthermore the outcome must include new investment into the club. It cannot be solely about the interests of shareholders, whether existing or new.
“We call upon all parties to put Manchester United interests before their own interests.
“If the reports are true regarding INEOS obtaining a 25 per cent stake in our club there are a number of questions around the transaction which need clarity before supporters can make any judgement on its merits.”
Manchester United have endured a difficult start to the season, sitting 10th on the Premier League table and losing their opening two Champions League games.
