The company's stock ended at Rs 340.05, up 5.69 per cent on the BSE. During the day, the scrip surged 7.84 per cent to Rs 347.
Ranbaxy's shares settled 5.75 per cent higher at Rs 340.45 on NSE.
"Ranbaxy Lab posted results better-than-expected, on the operational front," said Sarabjit Kour Nangra, VP Research Pharma, Angel Broking.
Ranbaxy Laboratories's fourth-quarter net loss narrowed to Rs 158.94 crore, mainly on account of higher sales of its Absorica acne drug.
The company had posted a loss of Rs 492.44 crore a year earlier, according to a statement.
Ranbaxy also said it made a provision of Rs 257.4 crore towards the financial impact of a US ban on import of products made at its plant at Toansa.
Revenue rose 6.7 per cent to Rs 2,894 crore in the quarter from Rs 2,711.2 crore in the year-ago period. North America sales were Rs 1,020 crore, Ranbaxy said.