Whether it's a proposed merger of two food and beverage industry mainstays or the largest foreign acquisition by a Chinese state-run company in three years, a bevy of Am Law 100 firms have enjoyed a busy few days on the big deal front.

H.J. Heinz Co./Kraft Foods Group Inc.

Pittsburgh-based H.J. Heinz will merge with Northfield, Illinois-based Kraft Food in a deal backed by billionaire Warren Buffett's Berkshire Hathaway and Brazilian private equity firm 3G Capital. The merged entity, The Heinz Kraft Co., will have a market capitalization of some $40 billion with combined revenues of $28 million, according to The Wall Street Journal.