Thanks for that.
I make that 13 operators, unless anyone has sharper eyes and can add any:
AFL Aeroflot Russian Airlines
AUL Smartavia Airlines
LLM Yamal Airlines
NWC North-West Air Company
NWS Nordwind Airlines
PBD Pobeda
RSY I-Fly
SBI S7 Airlines
SDM Rossiya Airlines
SHU Aurora Airlines
SVR Ural Airlines
TYA NordStar
UTA UT Air