Weil, Gotshal & Manges has suffered a significant departure as Michael Aiello, chair of its roughly 600-lawyer corporate department, heads to rival firm Cravath, Swaine & Moore.
Aiello also holds a seat on Weil’s management committee, making his exit one that carries weight far beyond a standard lateral partner move.
He is widely regarded as one of the most sought-after dealmakers in the United States, with a client base and deal sheet that few corporate lawyers can match.
Aiello is not making the move alone, bringing a team of mergers and acquisitions partners with him in a group reported to be around a half-dozen strong.
Among those departing alongside him is Matt Gilroy, who served as corporate co-head at Weil, further deepening the blow to the firm’s transactional leadership.
Losing a corporate chair alongside a meaningful portion of his practice group in a single coordinated move is the kind of event that reshuffles a firm’s internal power structure significantly.
The departures will inevitably prompt questions about Weil’s ability to retain its standing as one of Wall Street’s premier corporate advisory firms in the near term.
Cravath, by contrast, lands a marquee name whose reputation in M&A circles gives the firm an immediate boost to its dealmaking credentials and market profile.
The move also signals broader competitive pressures within Big Law, where lateral raiding of senior partners and entire practice groups has accelerated sharply in recent years.
Weil responded to the news with a statement that pointedly described Cravath as “a smaller platform,” a choice of words that drew immediate attention within legal industry circles.
The framing was widely read as an attempt to minimise the reputational damage of losing one of its most prominent partners to a direct competitor.
Whether the characterisation lands as intended or simply underscores the sting of the departure remains a matter of debate across the legal market.
What is not in dispute is that Aiello’s move to Cravath represents one of the more consequential lateral shifts in corporate law seen so far in 2026.