Juventus and Roma are the Italian representatives in the top 10 biggest spending European clubs since 2014-15, with Barcelona shelling out €1.08bn.
Voetbal International calculated the transfer activity from the last five years, including so far this summer, and found Barcelona had spent €1.08bn.
Manchester City were second in the list on €996m, with Manchester United spending €890m and Chelsea €875m.
Juventus are the top Italian representatives in fifth place, having spent €868m, although that is bound to climb once Matthijs de Ligt is purchased from Ajax for €70m.
Atletico Madrid follow on €800m, PSG surprisingly only €773m and Real Madrid €755m.
Champions League winners Liverpool are in ninth place with €714m spent, but then there is a drop-off to Roma in 10th on €586m.
It is remarkable considering the Giallorossi’s reputation as a selling club to see they have been the 10th biggest spenders on the transfer market in the last five years.