It was the second year in a row that the Wall Street firm took the top honor.
The IFLR Americas Awards forms part of an annual trio of regional awards held every Spring in Hong Kong (Asia), London (Europe) and New York (Americas).
In recent years, a Middle East event in Dubai has been added to the roster.
The Asia awards took place on February 27 2013, while the European awards are in London on April 10 2013.
To attend the London event, contact Melanie Petch.
International Financial Law Review is a well-established and respected publication which covers legal and regulatory issues in the financial markets.
Its awards are distinguished from others in the market through focusing on the law firms that handle complex and innovative cross-border transactions.