Power Grid Corporation of India Limited (POWERGRID), is a 'Maharatna'​ Company operating under Ministry of Power, is engaged in power transmission business. POWERGRID is a listed Company, with 57.90% holding of Government of India and balance by Institutional Investors & public. Power Grid Corporation of India limited (POWERGRID) was incorporated on October 23, 1989. POWERGRID started functioning on management basis with effect from August, 1991 and it took over transmission assets from NTPC, NHPC, NEEPCO and other Central/Joint Sector Organizations during 1992-93 in a phased manner. POWERGRID has been implementing various transmission projects for generation capacity addition under central sector, Ultra Mega Power Projects (UMPPs), Independent Power Producers (IPPs) and other projects. With rapid increase in asset base of the organisation, National Transmission Asset Management Centre (NTAMC) has been established, which is manned by experts on 24x7 basis to provide expert handling to system & equipment.