Cadwalader, Wickersham & Taft’s energy and commodities group is breaking up, with lawyers leaving for Allen & Overy and Haynes and Boone, part of a process that will see the Wall Street firm close a Houston office that it opened six years ago.

In a statement provided to The American Lawyer, Cadwalader’s managing partner Patrick Quinn said the firm’s decision to shutter its Houston outpost was a reflection of its new emphasis on a core client base that includes big banks and financial institutions, large companies and hedge funds.