The Reds confirmed the arrival of experienced keeper Tom Heaton, who joins on a free transfer from Aston Villa and seals a return to Old Trafford for a second spell at the club.
A deal to sign Jadon Sancho was finalised on 23 July, with the England winger arriving from Borussia Dortmund after a fee had been agreed with the Bundesliga side.
United also added four-time Champions League winner Raphael Varane, with the former Real Madrid centre-back signing prior to the opening weekend victory over Leeds.
INS
Tom Heaton (Aston Villa, permanent)
Jadon Sancho (Borussia Dortmund, permanent)
Raphael Varane (Real Madrid, permanent)
A number of loan moves away from Old Trafford are expected to be sanctioned, with Reece Devine already agreeing a switch to Scotland with St Johnstone and Nathan Bishop on his way to Mansfield Town.