Dewey Ballantine and LeBoeuf, Lamb, Greene & MacRae announced Wednesday that their partners have formally approved the combination of the two firms into Dewey & LeBoeuf, effective Monday.
The firms had announced last month an agreement to merge, and the votes had been regarded as a formality.
LeBoeuf chairman Steven H. Davis will become chairman of the combined firm, and the executive committee will have equal representation of partners from the two firms.
Dewey & LeBoeuf will have 1,300 lawyers in 12 countries. The combination is the largest ever between two New York-based firms, both of which have taken active measures in recent years to bolster their competitive position in a crowded marketplace.
At LeBoeuf, Davis has overseen a years-long restructuring that led to partner departures and office closings but also increased profitability substantially.
Meanwhile, Dewey previously planned a merger with San Francisco's Orrick, Herrington & Sutcliffe, but that deal collapsed earlier this year.