The issue received bids for 43.2 million units out of the 425.4 million units on offer for subscription.
The InvIT has been touted as a good long-term option for investors looking for assured 10-12 per cent returns as analysts expect the InvIT to comfortably generate that much yield annually.
The infrastructure trust is a first of its kind offering by a state-owned entity in India and is priced at Rs 99-100 per unit.
Power Grid InvIT is looking to raise Rs 7,735 crore through the issue which includes a fresh issue as well as an offer for sale from the sponsor.
The infrastructure trust has said that it will acquire five projects initially from Power Grid with a total network of 11 power transmission lines of 3,698 km and three substations having 6,630 MVA of aggregate transformation capacity across 5 states in India.