#1 Cristiano Ronaldo (€117 million)

Juventus shocked everyone after they struck a deal for the evergreen Cristiano Ronaldo, signing him from Real Madrid for a whooping €117 million fee in 2018. He currently holds the crown as the most expensive footballer signed by the club till date.
Apart from being the 7th most expensive footballer in the world at present, he is also the most expensive player to be signed by a club above the age of 30.
Regarded as arguably the best player of his generation, CR7's acquisition will help the Old Lady as much off the pitch as on it. An early financial effect was visible when the club's shares showed a gain of 8.6 percent and reached a value of €0.88 following the confirmation of his transfer.
Overall, Ronaldo's arrival will also help Serie A grab more attention, as a result the clubs will financially be able to compete with the Spanish and the English giants.
Being a literal personification of success, there's little doubt that Juventus are set to enter an era of glory with the 33-year-old by their side.