Bologna have signed Swedish defender Mikael Antonsson, while Udinese, Inter and Cesena also secure new buys.
The Stadio Dall'Ara side announced it has bought 30-year-old Antonsson from FC Copenhagen, where he impressed in the Champions League this season.
In other news, Udinese have officially signed Abdoul Wahlid Sissoko from Troyes.
The 21-year-old midfielder has put pen to paper on a five-year contract.
Inter are preparing for the future with three additions to their youth team.
Guinea midfielder Karma Ismael Bangoura joins from ASR Rel Miramare, Ghana striker Samuel Darko Appiah from ASDC Fiume Veneto-Bannia and forward Luis Zonta from Bassano.
Cesena are on the verge of completing their move for 24-year-old Dynamo Bucharest winger Marius Alexe.