"There are loan deals already arranged for some of the boys and I would expect more to be agreed in the coming days and weeks," Ole Gunnar Solskjaer said in United's programme notes for the Brentford friendly (h/t MEN).
"And those are important because we have some really talented lads who need to get out there and play competitive senior football.
"A number will, of course, remain part of our group here, but this is already a highly competitive squad which is even stronger than last season.
"I'm absolutely thrilled that we have managed to conclude a deal for Jadon Sancho, who we regard as one of the most exciting young attackers in the game, while it's also great to have Tom Heaton back home in our goalkeeping department once more.
"I'm hopeful that there might be a little more business done by us before the summer window closes, while I'm also mindful that a lot of our squad members underwent great development on loan last term, so there's no question that we go into this season in better shape than last season."
There is no mention of Raphael Varane in the notes as his transfer has not been officially announced yet.
Man United have only confirmed they reached an agreement with Real Madrid over the move.
Kieran Trippier, Declan Rice, Eduardo Camavinga and Saul Niguez are all linked with a move to Old Trafford this summer.
