Crowell & Moring is losing a slew of lawyers, with former financial services chair William O’Connor leading a group to Thompson & Knight this week, while international arbitration chair Arif Hyder Ali and three other partners from his group are headed to Weil, Gotshal & Manges within the next two weeks.

Reached by phone in Miami, where he was boarding a flight to New York, O’Connor confirmed Monday that he is leaving Crowell. Joining him in making the move to Thompson & Knight is New York–based financial services and litigation partner Evelyn Seeler.