The stock went up 2.38 per cent to settle at Rs 887.35 on BSE. During the day, it gained 2.9 per cent to Rs 891.85.
At NSE, shares of the drug major ended at Rs 887.20, up 2.37 per cent.
One of the company's subsidiaries has offered to acquire InSite Vision, Sun Pharmaceutical Industries said in a statement.
"The indirect wholly-owned arm of Sun Pharma will commence a tender offer for all the issued and outstanding common stocks of InSite Vision at USD 0.35 per share in cash, a 30 per cent premium to the implied price," Sun Pharma said.
The deal gives Sun Pharma access to four late stage branded ophthalmic products in the US.
