Only moves featuring at least one Premier League or Championship club are listed.
The summer transfer window began once clubs had concluded their final domestic fixture of the 2011–12 season, but many transfers will only officially go through on 1 July because the majority of player contracts finish on 30 June.
This list also includes transfers featuring at least one Premier League or Football League Championship club which were completed after the end of the winter 2011–12 transfer window and before the end of the 2012 summer window.
Although Cardiff City and Swansea City are associated with the Welsh flag, they play in the Championship and the Premier League (of England) respectively, and so transfers related to them and another non-English club are included.
MLS player contracts are owned by the league and not by individual clubs.