Mining baron Anil Agarwal's Cairn India Ltd will spend up to Rs 5,725 crore (Rs 57.25 billion) to buy back shares to give him greater control over the nation's largest private oil producer.
The exploration company will buy back shares from January 23 and extinguish them.
The purchase may include a part of the 10.3 per cent stake held by former promoter Cairn Energy Plc.
Cairn India, which is sitting on a cash pile of about $3 billion, received shareholder approval to buy 17.09 crore (170.9 million) shares, or 8.9 per cent of the equity, from the open market at not more than Rs 335 apiece, a public notice said.
The buyback will be open until July 22, the notice said.
After completion, Agarwal's Vedanta Group ownership in Cairn India will rise to 64.53 per cent from 58.76 per cent.
Separately, London-listed Vedanta Resources Plc said it received 99.89 percentage of votes in favour of potential participation of Cairn Energy in the proposed buyback at a shareholder meeting held on Monday.
UK's Cairn Energy sold a majority stake in Cairn India to the Vedanta Group at Rs 355 a share, a level not seen in the past year.
The maximum buyback price represents an over 4 per cent premium compared to the average of the weekly high and low of the closing share price of the company on the stock exchanges during the two weeks preceding the board approval on November 26, according to the notice.
A buyback is a process where a company repurchases outstanding shares to reduce their number in the market.
Companies buy back shares to increase their value by reducing supply or to eliminate potential threats by shareholders who may be seeking a controlling stake.
While a buyback is considered an efficient way to return capital to shareholders, it also indicates the company does not have significant capital expenditure plans and may not be looking at any major acquisitions.
The Vedanta Group holds 112.27 crore (1.12 billion) of Cairn India's total of 191.05 crore (1.91 billion) outstanding shares. Cairn UK Holdings Ltd has 19.61 crore (196.1-million) shares and Life Insurance Corporation has 16.77 crore (8.78 per cent) shares.
ICICI Prudential holds 1.08 per cent while foreign institutional investors have a 15.14 per cent holding. Financial institutions and banks have 8.7 per cent.