New Delhi: Warren Buffett’s Berkshire Hathaway Inc. is set to buy a small stake in One97 Communications Ltd, the parent of Paytm, making it the billionaire investor’s first investment in an Indian company, according to two people aware of the development. Paytm, India’s largest payment services provider, has been in talks with Berkshire Hathaway since early February to raise about ₹ 2,200- 2,500 crore ($300-350 million) at a valuation of about $10-12 billion, the two people cited above said on condition of anonymity.