Perpignan have signed seven players for next season including South African scrum-half Dewaldt Duvenage from the Stormers.
However, 33-year-old French prop Nicolas Mas will be leaving the club after 14 years to join Montpellier.
Perpignan also announced the arrival of fly-half Camille Lopez from Top 14 rivals Bordeaux-Begles, as well as props Romanian Ion Paulica from recently-relegated English Premiership side London Welsh and Georgian Giorgi Jgenti from Montpellier.
Australian lock Justin Purll is coming with Lopez from Bordeaux while wings South African Wandile Mjekevu and Fijian Watisoni Votu are joining from the Sharks and English Premiership side Exeter respectively.
Perpignan are challenging for a place in the end-of-season title play-offs and lie seventh at present, six points adrift of Montpellier who occupy the last play-off position with two games remaining.