Maharashtra Natural Gas Limited (MNGL )
Haridwar Natural Gas Pvt. Ltd
Indraprastha Gas Limited
Hindustan Petroleum Corporation Limited
Indian Oil Corporation
Utility Powertech Limited
Tata Power Delhi Distribution Limited
Bharat Petroleum Corporation Limited
Green Gas Limited
Gail (India) Limited
NTPC Limited
Godavari Gas Private Limited CNG
Central UP Gas Limited
Bhagyanagar Gas Limited
Bharat Heavy Electricals Limited