Four Pierce Bainbridge Beck Price & Hecht lawyers, including Tom Warren, who had been acting managing partner, plan to launch their own law firm by next month, the latest in a slew of lawyer departures from the unraveling litigation shop.

The four lawyers leaving Pierce Bainbridge—Warren, Dan Terzian, Daniel Dubin and Erick Kuylman—will form the new boutique, Warren Terzian. Before arriving at Pierce Bainbridge, Warren co-chaired Baker & Hostetler’s national appellate practice.