The Power Grid Corporation of India Limited, is an Indian state-owned Maharatna company headquartered in Gurugram, India and engaged mainly in Transmission of Power. POWERGRID transmits about 50% of the total power generated in India on its transmission network

NTPC Limited, formerly known as National Thermal Power Corporation Limited, is an Indian Public Sector Undertaking, engaged in the business of generation of electricity and allied activities. It is a company incorporated under the Companies Act 1956 and is promoted by the Government of India

Bharat Heavy Electricals Limited owned and founded by the Government of India, is an engineering and manufacturing company based in New Delhi, India. Established in 1964, BHEL is India's largest power generation equipment manufacturer.

Thyssenkrupp AG is a German multinational conglomerate with focus on industrial engineering and steel production. The company is based in Duisburg and Essen and divided into 670 subsidiaries worldwide. It is one of the world's largest steel producers; it was ranked tenth-largest worldwide by revenue in 2015

Siemens AG is a German multinational conglomerate company headquartered in Munich and the largest industrial manufacturing company in Europe with branch offices abroad.

Tata Group is an Indian multinational conglomerate holding company headquartered in Mumbai, Maharashtra, India. Founded in 1868 by Jamsetji Tata, the company gained international recognition after purchasing several global companies. One of India's largest conglomerates, Tata Group is owned by Tata Sons.

Larsen & Toubro Limited, commonly known as L&T Limited is an Indian multinational conglomerate company headquartered in Mumbai, Maharashtra, India.