With high-profile transfers like James Rodriguez, Donny van de Beek and Kai Havertz dominating the headlines - here are 10 incredible deals you may have missed.
Rodriguez completed his surprise move from Real Madrid to Everton on Monday evening as he reunited with former coach Carlo Ancelotti as his marquee signing within an ambitious new project.
Scroll through the gallery to see the transfers you may have missed
Attracting a player of the calibre has gone down as a major coup for the Toffees but the 2014 FIFA World Cup Golden Ball winner is not the only former Ancelotti player that's been roped into the Premier League.
The Italian also secured Brazil international Allan, who is considered as one of the finest defensive midfielders in world football from Napoli in a €25-million deal.
Elsewhere, AS Monaco's new head coach Niko Kovac returned to the Bundesliga to raid Bayer Leverkusen for Germany forward Kevin Volland in a cut-price €15.5-million, while Havertz followed him out the door with a move to the Blues.
One of the most highly publicised sagas of the window is undoubtedly FC Barcelona with a squad overhaul expected after Lionel Messi's announcement to return - Ivan Rakitic has been the only high-profile exit thus far.