After generating much chatter in the investment world, the $23 billion takeover of the food company H. J. Heinz by Warren Buffett’s Berkshire Hathaway and private equity firm 3G Capital is now attracting some regulatory attention, reports NYTimes.com.

In what’s billed as one of the biggest deals in history, the deal is being probed by the SEC for a potential insider trading after a sharp increase in trading was noticed.