This list includes transfers featuring at least one club from either the Premier League or the EFL Championship that were completed after the end of the summer 2019 transfer window on 8 August and before the closure of the 2020 winter transfer window on 31 January 2020. Players without a club may be signed at any time, clubs may sign players on loan dependent on their league's regulations, and clubs may sign a goalkeeper on an emergency loan if they have no registered senior goalkeeper available.
All players and clubs without a flag are English. Note that while Cardiff City and Swansea City are affiliated with the Football Association of Wales and thus take the Welsh flag, they play in the English Championship, and so their transfers are included here.
The 2013–14 season was the 11th season in the Football League and the first season at the second tier of English football played by Yeovil Town Football Club, an English football club based in Yeovil, Somerset. Their promotion via the play-offs in the 2012–13 season meant they played in the Championship, for the first time in the club's history.
The 2014–15 season was the 116th season of competitive league football in the history of English football club Wolverhampton Wanderers. The club competed in the second tier of the English football system, the Football League Championship, following their return to the second level after being promoted as champions from League One at the first attempt.
The 2014–15 season was Cardiff City Football Club's 98th season playing professional football and the 87th in the Football League. Cardiff were relegated from the Premier League during the last season, meaning an instant return to the Championship, the second tier in English football. Also during this season, it was announced that the club would revert back to blue home kits with the red being made the away kit. The first home game back in blue was a 1-0 victory over Fulham on January 10, 2015.
The 2015–16 season was the 117th season of competitive league football in the history of English football club Wolverhampton Wanderers. The club are competing in the second tier of the English football system, the Football League Championship for a second consecutive year having finished 7th in the previous season following their promotion from League One.
The 2017–18 season was the 140th in the history of English football club Wolverhampton Wanderers and the first under former FC Porto manager Nuno Espírito Santo who was appointed on 31 May 2017. The club competed in the English Football League Championship for the fourth consecutive and final year as well as the EFL Cup and the FA Cup.
The 2018–19 season was the club's first season of play back in the top tier of Scottish football since 2015, having been promoted from the Scottish Championship at the end of the previous season. The club had been relegated from the Premiership at the end of the 2014–15 season. St Mirren will also compete in the League Cup and the Scottish Cup.
The 2018–19 AFC Bournemouth season is the club's fourth consecutive season in the top flight of English football and their 129th year in existence. This season Bournemouth will participate in the Premier League as well as the FA Cup and EFL Cup.
The 2019–20 season was Everton's 117th and 66th consecutive season in the top flight of English football. They participated in the Premier League, the FA Cup and the EFL Cup. The season covered the period from 1 July 2019 to 26 July 2020.
The 2020–21 season was the 143rd season in the history of the English football club Wolverhampton Wanderers. The club competed in the Premier League for the third consecutive season and also participated in this season's edition of the FA Cup and EFL Cup.