This guide has been keeping track of all the confirmed incomings and outgoings as Ole Gunnar Solskjaer reshapes his squad.
Wales international Daniel James was the first player to join the Reds this summer, after a deal was finalised with Swansea City, subject to international clearance.
The 20-year-old winger signed a five-year contract, with the club having the option of extending this by another season.
James was followed into the Aon Training Complex by England Under-21 defender Aaron Wan-Bissaka, when his transfer was completed on Saturday 29 June.
The acquisition from Crystal Palace signed the same length of contract as his fellow summer signing - five years with a possible sixth year in addition.