Khaitan & Co. and Ashurst are advising Indian energy groups Vedanta and Cairn India on the former’s $2.3 billion offer to buy out minority shareholders in latter, with Sullivan Cromwell advising the financial adviser to Cairn India.

Reuters quoted Vedanta’s CEO as saying that it would bring the closer to its goal of being a major diversified natural resources player. The deal will help parent Vedanta Resources repay hefty debts, and is expected to close in the first quarter of 2016.

The Khaitan team was led by partners Haigreve Khaitan and Sharad Abhyankar. The Ashurst team was led by London partners Tom Mercer and Richard Gubbins and Hong Kong partner Stuart Rubin. Meanwhile, the Sullivan & Cromwell team, which represented Bank of America Merrill Lynch as financial adviser to Cairn India, was led by New York partner Stephen M. Kotran.