The stock climbed 4.65 per cent to settle at Rs 119.30 on BSE. During the day, it gained 6.49 per cent to Rs 121.40.
At NSE, shares of the company went up 4.69 per cent to close at Rs 119.25.
The stock was the biggest gainer among the blue-chips on both Sensex and Nifty.
The company's market valuation rose by Rs 1,297.87 crore to Rs 29,199.87 crore.
The company reported a net profit of Rs 396 crore during January-March 2016.
The tentative or flash financial results of the company were approved by its board of directors in a meeting held today, BHEL said in a BSE filing.
BHEL recorded a provisional loss of Rs 877 crore in 2015-16 compared with the audited net profit of Rs 1,419 crore in the previous fiscal (2014-15).
It further said its turnover was Rs 26,702 crore in the last fiscal as against Rs Rs 30,947 crore in the preceding fiscal.
