Bulgargas (Bulgaria)
Elekoms (Lithuania)
Emerson Process Management (Holland)
Euroenergy Holding (Russia)
G.A.S. (Czech Republic)
Jihočeská plynárenská (Czech Republic)
Linde Vítkovice (Czech Republic)
Moravský Plynostav (Czech Republic)
Plynostav Pardubice holding (Czech Republic)
Plynostav-regulace plynu (Czech Republic)
Pražská plynárenská (Czech Republic)
RWE Energy Customer Services (Czech Republic)
RWE Transgas Net (Czech Republic)
RWE Transgas (Czech Republic)
Severomoravská plynárenská (Czech Republic)
Slovenský plynárenský priemysel (Slovakia)
Škoda JS (Czech Republic)
Západočeská plynárenská (Czech Republic)