CGIL is a very large (the largest) union , connected with the left parties (opposition) in Italy, it represents mainly ground staff in AZ (maintenance and airport workers)
CISL is the second largest, connected with the governing party, it represents ground staff, airport and administration, some pilots.
UIL is the third, halfway between the governement and opposition, as well it represents mainly ground staff and a few pilots.
UGL is connected with the right parties, supporters of the governement, it represents, well... nearly nobody.
These four signed immediately an agreement with the potential buyers of AZ, having other, more important issues with the governement and using AZ as trading tool.
Part of the ground personnell and the vast majority (about 90%) of crews are represented by ANPAC/UP (pilots) AVIA/ANPAV (cabin crew) SDL (ground staff and cabin crew).
ANPAV has its core supporters between the cabin services managers, old enough to receive a golden handshake and retire.
That's why in September it joined the four main unions in reaching a quick deal with CAI (the group of potential buyers).
So many Unions. So little time?
Time for all to get real?