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Stephen Besen


New York

Besen Stephen
Stephen Besen


New York

Stephen is a partner in the M&A practice, based in New York. He has over 35 years of experience representing clients in complex cross-border public and private M&A transactions. Clients rely on his broad-based experience in structuring and negotiating acquisitions, dispositions and joint ventures, as well as advising on general corporate legal matters.

Stephen has been recognized as one of the leading lawyers in corporate/M&A and private equity by Chambers USA and Legal 500. In 2008, Stephen was named “Dealmaker of the Year” by The American Lawyer for his role advising SABIC on the $11.6 billion acquisition of GE Plastics.

He regularly represents financial institutions, asset management firms and industrial/infrastructure clients in Asia, Europe and the United States.

Experience highlights


New York

Allen & Overy LLP
1221 Avenue of the Americas
New York
NY 10020

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Admitted: Bar of the State of New York, 1984


S.B. Management and Economics, Massachusetts Institute of Technology, Cambridge, Massachusetts, 1980

J.D., Harlan Fiske Stone Scholar, Columbia University School of Law, New York, New York, 1983


The U.S. M&A Practice is ranked as Highly Regarded

Chambers USA: Mergers & Acquisitions, 2018

News & insights

Wind turbine

News: 07 MAY 2021

Kamil Jankielewicz rejoins Allen & Overy as Counsel and Head of the Polish Energy and Environmental practice

Allen & Overy announced that Kamil Jankielewicz has rejoined the firm as a Counsel in the Projects, Energy, Natural Resources and Infrastructure Group (PENRI) and will lead the Polish Energy and…

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Group of ultra modern skycrapers

Publications: 16 DECEMBER 2020

Biden election set to boost investor confidence

The election of Joe Biden is likely to usher in an era of more stable and predictable politics in the U.S., increasing the kind of investor confidence on which M&A transactions thrive.

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LED stock exchange screen

Publications: 16 DECEMBER 2020

Financial services: towards digitalisation and consolidation

U.S. financial services sector M&A picked up in the second half of 2020, in line with the wider U.S. market. Asset management and fintech investments led the way, with regional bank mergers also…

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Allen & Overy graphic

Publications: 21 APRIL 2020

Covid-19 coronavirus: SEC public company disclosure considerations

US public companies and other companies with SEC reporting obligations (including foreign private issuers with US listings) have an obligation to ensure the accuracy and completeness of their public…

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