PetroChina Company Limited
E.ON SE
British Gas Ltd
CNOOC Limited
GAIL (India) Limited
Tokyo Gas Co. Ltd.
Daigas Group
Toho Gas Co Ltd
E.ON UK Plc
Ovo Energy Ltd
Sempra Energy
Atmos Energy Corporation
Southern Company Gas
Consumers Energy Coop
Engie SA
TotalEnergies S.E.
Electricite de France SA
EnBW Energie Baden-Wurttemberg A.G.
Equinor ASA.
WINGAS GmbH
RWE AG