Trevor Soames, a former global antitrust co-chair at Howrey who joined Shearman & Sterling’s Brussels office in 2011, has left the firm to start his own boutique.

The move is the latest European exit from the storied New York firm and comes a month after The American Lawyer and London-based sibling publication Legal Week reported that Soames and fellow Shearman & Sterling antitrust partners Stephen Mavroghenis and Miguel Rato were in talks to join Quinn Emanuel Urquhart & Sullivan.