This is a list of player transfers involving Pro12 teams before or during the 2015–16 season.
Benetton Treviso
Players in
Simone Ferrari from AS Rugby Milano
Duncan Naude from RC Chalon
Jean-François Montauriol from Rovigo Delta
Andrea De Marchi from Rovigo Delta
Filo Paulo from Cardiff Blues
Robert Barbieri from Leicester Tigers
Alberto De Marchi from Sale Sharks
Luke McLean from Sale Sharks
Tom Palmer from Gloucester Rugby
Luca Bigi from Petrarca
Filippo Filippetto from San Donà
Ornel Gega from Mogliano
Braam Steyn from Calvisano
Cherif Traorè from Viadana
Tommaso Iannone from Zebre
Chris Smylie from Hurricanes
Roberto Santamaria from Viadana
Players out
Simone Favaro to Glasgow Warriors
Michele Campagnaro to Exeter Chiefs
Joe Carlisle to London Welsh
Corniel van Zyl retired
Paul Derbyshire to Zebre
Giovanni Maistri to Petrarca
Antonio Pavanello retired
Ruggero Trevisan retired
Romulo Acosta to Petrarca
Albert Anae to Brumbies
Amar Kudin to San Dona
Mat Luamanu to Harlequins
Tomás Vallejos to Stade Francais
Josè Francisco Novak to UAL Rugby
Nicola Cattina to Patarò Lumezzane
Bruno Mercanti to Bizkaia Gernika
Meyer Swanepoel released
Henry Seniloli released
Cardiff Blues
Players in
Tom James from Exeter Chiefs
Rey Lee-Lo from Hurricanes
Blaine Scully from Leicester Tigers
Cam Dolan from Northampton Saints
James Down from London Welsh
Nicky Griffiths from Wales Sevens
Players out
Rory Watts-Jones retired
Filo Paulo to Benetton Treviso
Adam Jones to Harlequins
Joaquin Tuculet to Jaguares
Dafydd Hewitt retired
Simon Humberstone to Doncaster Knights
Tom Williams to Scarlets (season-loan) Marc Breeze to Cardiff RFC Lucas González Amorosino to Munster