Seyfarth Shaw is expanding its securities litigation team in New York with a three-partner team from Arnold & Porter Kaye Scholer led by Vincent Sama, who will co-chair the firm’s national commercial and securities litigation practice.

Sama joined the firm Monday with fellow partners Catherine Schumacher and Daphne Morduchowitz. The team has represented former officers of American International Group and Lehman Brothers and SFX Entertainment in multiple securities class actions and Securities and Exchange Commission investigations and enforcement actions.