The stock soared 16.70 per cent to settle at Rs 76.50 on BSE. During the day, it jumped 19.98 per cent to Rs 78.65.
At NSE, shares of the company surged 17.65 per cent to close at Rs 76.65.
The company's market valuation rose by Rs 806.98 crore to Rs 5,631.98 crore.
Shares of Reliance Infrastructure also gained 3.23 per cent to Rs 436.85 on BSE.
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In a statement, Reliance Infrastructure today announced closing of the open offer period for the acquisition of Pipavav Defence and Offshore Engineering Co Ltd.
According to banking sources, Reliance Infrastructure has purchased an additional 17 per cent stake in Pipavav Defence for an estimated Rs 850 crore.
The open offer was made by Reliance Infrastructure and its wholly-owned subsidiary, Reliance Defence Systems Pvt Ltd. Now, their holding in Pipavav has increased to nearly 35 per cent.