With the increase in offer price the size of the proposal now stands at Rs 438.3 crore (Rs 4.4 billion).
The company, which holds 22.48 per cent share in Great Offshore, had initially offered to acquire 20 per cent stake in the latter for Rs 405 per share.
Bharati Shipyard is locked in a takeover battle with rival ABG Shipyard, which has also made an open offer to buy over 32.12 per cent stake in Great Offshore at Rs 520 a share.
In a filing to the BSE, Bharati Shipyard said its revision of the open offer price followed acquisition of 3.01 per cent stake in Great Offshore by Dhanshree Properties (a sister concern of Bharati) from open market on September 16.
"Based on the highest price paid for acquiring some of the shares in set out in the foregoing, the offer price stands revised from Rs 405 to Rs 560 per equity share," it said.
Accordingly, the offer size stands revised to Rs 438.30 crore(Rs 4.4 billion), it added.
Shares of Bharati Shipyard closed at Rs 194.95, down 3.01 per cent, while Great Offshore settled down 0.45 per cent at Rs 558 on the BSE.
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