The stock went up 2.41 per cent to settle at Rs 121.35 on BSE. Intra-day, it jumped 2.78 per cent to Rs 121.80.
On NSE, it rose 2.57 per cent to close at Rs 121.55.
On the volume front, 10.44 lakh shares of the company changed hands at BSE and over 70 lakh at NSE during the day.
LIC, which had 9.08 per cent stake in NTPC earlier, raised its shareholding to 12.98 per cent by buying shares between July 25, 2014, and February 24, 2016, NTPC said in a filing to BSE.
Earlier this week, the government raised about Rs 5,030 crore from sale of its 5 per cent stake in NTPC, with insurance companies getting almost two-thirds of shares, but retail participation was lukewarm amid a free fall of stock markets.