This guide keeps track of all the confirmed incomings and outgoings as Ole Gunnar Solskjaer reshapes his squad ahead of the 2019/20 campaign.
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.