The government expects to raise $2.25 billion from the offer, the disinvestment secretary has said.
The government will sell a 783.26 million shares or 9.5% stake in NTPC through the single-day auction, as part of its drive to raise Rs 270 billion by selling shares in some state enterprises in the FY12-13.
Ahead of the share sale, NTPC shares closed at Rs 151.80 on Wednesday, down 2.4% in a weak Mumbai market.