The L&T scrip fell by 6.61 per cent to settle at Rs 1,573 on the BSE. In intra-day session, it lost 7.98 per cent to Rs 1,549.85.
On the NSE, it slumped 7.44 per cent to close the day at Rs 1,558.35.
The stock was the biggest dampener among the blue-chips on both the Sensex and Nifty during the day.
The market value of the engineering and construction major plummeted by Rs 10,342 crore to Rs 1,46,107.99 crore.
L&T reported 8.7 per cent rise in consolidated net profit for the third quarter at Rs 866.54 crore on higher revenue. It had clocked Rs 796.66 crore net profit in the October-December quarter of last fiscal, it said in a BSE filing.
The company's revenue grew 9.6 per cent to Rs 24,033 crore in which international business contributed Rs 6,400 crore. It had reported Rs 21,929 crore revenue in the same period of last fiscal.
It had profit of Rs 1,241 crore in the same quarter of last fiscal. Net sales grew 4 per cent at Rs 14,995 crore on yoy basis.
"Announcement of weaker-than-expected corporate earnings from infra major L&T, worsened the sentiments in the end," said Jayant Manglik, President-retail distribution, Religare Securities.
In the broader market, the BSE benchmark Sensex ended at 28,227.39, down 490.52 points.
