The 2025 summer transfer window officially closed on Monday, September 1, with clubs across Europe spending big to strengthen their squads. From record-breaking signings to surprise moves, here are the 10 most expensive transfers of the summer:

Alexander Isak – £125m
Liverpool broke the bank to land the striker from Newcastle United, making him the biggest signing of the summer.

Florian Wirtz – £100m (rising to £116m)
The German playmaker left Bayer Leverkusen for Liverpool in another blockbuster deal.

Hugo Ekitike – £69m (rising to £79m)
Liverpool again splashed the cash, this time on the French forward from Eintracht Frankfurt.

Benjamin Šeško – £66.2m (rising to £73.4m)
Manchester United secured the highly rated striker from RB Leipzig.

Bryan Mbeumo – £65m (rising to £71m)
The Red Devils also snapped up the Brentford winger to boost their attack.

Victor Osimhen – £64.8m
In a surprising move, Nigerian star Osimhen swapped Napoli for Turkish giants Galatasaray.

Nick Woltemade – £64.7m (rising to £69m)
Newcastle strengthened their frontline by signing the Stuttgart forward.

Matheus Cunha – £62.5m
Manchester United raided Wolves to bring in the Brazilian attacker.

Luis Díaz – £60.5m (rising to £64.8m)
The Colombian winger left Liverpool to join Bayern Munich in Germany.

Eberechi Eze – £60m (rising to £67.5m)
Arsenal completed their summer with the signing of the Crystal Palace star midfielder.

This transfer window has been one of the busiest in recent years, with Liverpool and Manchester United leading the way in big-money moves. The Premier League once again dominated global spending, showing just how powerful English clubs remain in the transfer market.