With the end of the transition period in most European countries, transfers in the 2023/24 season were practically put to an end, which was the reason for the International Center for Sports Studies (CIES) to make a summary of the clubs’ activities on the football market.##NAJAVA_MECA_7891995##CIES, a reputable organization that deals with sports research, in its traditional review of purchases and sales during the just-ended transition period, focused on clubs with continuity on the market, i.e. made a list of 169 clubs with the highest turnover in the previous five years, and found Chelsea at the top of it.During half a decade, the London club had a turnover of 2,572,000,000 euros, with a minus of 782,000,000, and according to those two criteria, it is unmatched in the whole world. Behind the Blues, at the top of the spenders’ list is a quartet of Premier League competitors: Manchester United (-773,000,000), Arsenal (-622,000,000), Tottenham (-608,000,000) and Newcastle (-574,000,000).When it comes to cash flow, Manchester City are first behind Chelsea with 1,726,000,000 euros, followed by Paris Saint-Germain, Barcelona and Manchester United. In the current season, the biggest spender was Al Hilal, which invested 384,000,000 euros in reinforcements, followed by Saudi-owned clubs Paris Saint-Germain with a deficit of 204,000,000, Al Ahli, which is ‘in the red’ with 198,000,000, and Newcastle (175,000,000) behind which stand the biggest spender in the previous five years, the club from Stamford Bridge.On the other side of the list, the clubs that made the most profit in the previous five years are led by Benfica with 354,000,000 euros collected, followed by Ajax (349,000,000) and Lille (282,000,000). Salzburg, Sporting, PSV, Lyon, Dinamo Zagreb, Valencia and Palmeiras.Interestingly, when it comes to the clubs with the highest earnings in the current season, the top of the list is Southampton, which profited as much as 167,000,000 euros, followed by Wolverhampton (135,000,000) and Villarreal (109,000,000).