Edwin van der Sar is set to retire while Gary Neville retired earlier in the season. It remains a doubt as to whether Paul Scholes will carry on next season. Michael Owen, Wes Brown and Owen Hargreaves could also be set for moves away from the club.
“We have some ideas in mind,” the United boss told MUTV. “Hopefully we can get them put in place.
“We have Ryan Giggs and Paul Scholes coming towards the end of their careers, Gary Neville has already retired and Edwin van der Sar is retiring, so there are holes we want to plug up in terms of the safety and security of the team for the next few years.
“Of course, we have some excellent young players and a lot of them have progressed, which gives us a great, powerful squad.
“I am looking at maybe three signings which would boost our overall quality in our team.”