Buffett protege Jain buys $20 million of Berkshire Hathaway's shares By: CNBC.com News December 20, 2018 at 14:49 PM EST Berkshire Hathaway's Ajit Jain bought about $20 million of Berkshire Hathaway stock on Dec. 18, according to a regulatory filing. Read More >> Related Stocks: Berkshire Hathaway