Indian Railways
Ircon International Limited
Texmaco Rail & Engineering Ltd
Kalindee Rail Nirman (Engineers) Limited
Larsen & Toubro Limited
Simplex Infrastructures Ltd
Railtech Infraventure Pvt. Ltd
Royal Infraconstru Ltd
Khem Chand
PCM Group of Industries
Era Group
ARSS
Rahee Group
Harshad Thermic Industries Pvt. Ltd.
Tata Aldessa
Kalpataru Power Transmission Limited
Shivakriti International Ltd
Max Group BD
Patil Rail Infrastructure Ltd