The stock jumped 20 per cent to end at Rs 1,216.55 on BSE.
On NSE, shares of the company soared 19.99 per cent to close at Rs 1,211.90.
L&T Technology Services yesterday reported 16.1 per cent increase in its consolidated net profit to Rs 126.3 crore for the December 2017 quarter.
The company had registered a profit of Rs 108.7 crore in the year-ago period.
Revenue was up 19.6 per cent to Rs 969.1 crore in the reported quarter from Rs 810.4 crore in the same quarter last fiscal.