We've put together a team of the most expensive signings, and it's a great way to remember some of the biggest moves of the window.
Goalkeeper
Lucas Chevalier has started well in his new role at PSG, helping the team win the UEFA Super Cup and keeping two clean sheets in his first three competitive games. The former Lille goalkeeper was signed for 40 million euros, making him the most expensive French goalkeeper of all time.
Defenders
Jeremie Frimpong has started at right-back for Liverpool, but his time on the pitch has been limited due to injury. He should be back available after the international break, and may even move to a more attacking role in the future.
Illya Zabarnyi has left the Premier League to join PSG, where he'll provide rotation for the experienced Marquinhos. The Ukrainian international was signed for 63 million euros, making him the second most expensive Ukrainian defender of all time.
Dean Huijsen has settled well into Real Madrid's defensive line, playing eight competitive games and looking set to be a cornerstone of Xabi Alonso's defense. The Amsterdam native has grown up in Marbella, Spain, and has always idolized Sergio Ramos.
Alvaro Carreras has made a strong impression at Real Madrid, playing full minutes in the opening three rounds of LaLiga and sending a clear signal to coach Xabi Alonso that he's ready to contribute.
Midfielders
Florian Wirtz's transfer to Liverpool was a record-breaking fee, with the German midfielder costing 125 million euros. He's notched 24 goal contributions in his last Bundesliga season, and the Reds have made him the most expensive German footballer of all time.
Martin Zubimendi has joined Arsenal from Real Sociedad for 70 million euros, becoming the club's most expensive signing. The midfielder comes from San Sebastian, just like his current coach Mikel Arteta.
Eberechi Eze has returned to Arsenal after 14 years, wearing the iconic number 10 on his back. The native of Greenwich has been a lifelong 'Gooner' and has made no secret of his affection for the club.
Forwards
Nick Woltemade has joined Newcastle from Stuttgart for 85 million euros, becoming the club's most expensive signing. The giant forward has impressed with his technique and has broken Stuttgart's sale record.
Alexander Isak has left Newcastle for Liverpool, where he'll be the most expensive player in Premier League history. The Swedish striker scored 23 league goals last season and added six assists, but will he be able to live up to the pressure and expectations?
Hugo Ekitike has joined Liverpool from Frankfurt for 95 million euros, equalling the German club's record sale. The lanky forward has scored two goals in the opening three rounds of the Premier League and has become the fifth most expensive Frenchman in history.
Substitutes
Other notable signings include Benjamin Sesko, Victor Osimhen, Matheus Cunha, and Luis Diaz, who could also have made the lineup if we disregarded positions.