Pillsbury Winthrop and Shaw Pittman have sealed their tie-in just months after they entered merger talks and in time for the self-imposed 4 April deadline.
The merged firm will gatecrash the US top 20, with revenues of around $600m (£378.3m) and with 900 lawyers across 16 offices.
The formal tie-in follows a period of preparation that saw the firms offload a raft of unwanted practices and conflicted lawyers.
As revealed by The Lawyer (7 March), Pillsbury sent a 20-lawyer insurance litigation team to Hunton & Williams’ Northern Virginia office last month, while Shaw Pittman saw a large number of partners who were conflicted by, or not enamoured with, the merger depart.
Pillsbury partners will dominate the management of the merged firm, with Mary Cranston taking the reins as chair and Silicon Valley-based partner Marina Park becoming the managing partner. Pillsbury’s David Snyder and Shaw Pittman managing partner Stephen Huttler will act as joint vice-chairs.