

United States
Our Boston, Los Angeles, New York, Silicon Valley and Washington, D.C. offices are the core of the global U.S. practice with 225 of our U.S. qualified lawyers based there.
Our attorneys handle the most sophisticated and complex domestic and cross-border transactions and cases for our U.S. and non-U.S. clients. We provide a wide range of comprehensive legal services to the world's leading financial institutions, global corporations, funds and multilateral agencies.
As more than 74% of our work involves more than two countries, our U.S. practice is fully integrated with our offices in Europe, Asia, South America, Australia and Africa to provide our international and domestic clients with seamless solutions and a global reach that is unmatched by any other U.S. firm.
Our attorneys include some of the country's leading practitioners that have been recommended by peers and clients in legal and industry publications.
Key contacts

Tim House
Partner
New York
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Dave Lewis
Partner
New York
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Anthony Mansfield
Partner
Washington, D.C.
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Daniel Sinaiko
Partner
Los Angeles
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Bijal Vakil
Partner, Global Co-head of Technology
Silicon Valley
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Daren Orzechowski
Partner, Global Co-head of Technology
Silicon Valley
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John Bennett
Partner
Boston
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Nicholas Mitrokostas
Partner
Boston
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Our experience
- Bank of China
- ENGIE Mexico
- Metro de Bogotá
- Terminal 1 at JFK airport
- Covered bond programs
- OneWeb Satellites
- Fresenius SE & Co. KGaA and Fresenius Medical Care & Co.
- Federal antitrust class actions
- Smithfield Foods acquisition
- Ernst & Young and Nortel Networks Corporation
- Cartel investigations
- ISDA
- ConRAC Consolidated Rental Car Facilities
- Novartis AG
- Lone Star Real Estate Funds
- JPMorgan Chase & Co.
- Volcker Rule
- SAP's acquisition of SuccessFactors Inc.
- GE Oil & Gas
- Richard Fuld
Bank of China
ENGIE Mexico
Metro de Bogotá
Terminal 1 at JFK airport
Covered bond programs
OneWeb Satellites
Fresenius SE & Co. KGaA and Fresenius Medical Care & Co.
Federal antitrust class actions
Smithfield Foods acquisition
Ernst & Young and Nortel Networks Corporation
Cartel investigations
ISDA
ConRAC Consolidated Rental Car Facilities
Novartis AG
Lone Star Real Estate Funds
JPMorgan Chase & Co.
Volcker Rule
SAP's acquisition of SuccessFactors Inc.
GE Oil & Gas
Richard Fuld
Our offices

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Boston
Allen & Overy LLP
One Beacon Street
Boston
MA 02108
- +1 857 353 4500
- Send email

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Los Angeles
Allen & Overy LLP
10250 Constellation Blvd, Suite 1000
Los Angeles
CA 90067
- +1 424 512 7150
- Send email

-
New York
Allen & Overy LLP
1221 Avenue of the Americas
New York
NY 10020
- +1 212 610 6300
- Send email

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Silicon Valley
Allen & Overy LLP
550 High Street
Palo Alto
CA 94301
- +1 650 388 1650
- Send email

-
Washington, D.C.
Allen & Overy LLP
1101 New York Avenue, NW
Washington, D.C.
20005
- +1 202 683 3800
- Send email
News & insights

News: 11 May 2022
Allen & Overy has advised the international consultancy firm BIP on the acquisition, through Chaucer, a UK consultancy firm specialising in digital transformation and part of the BIP Group since 2020,…

Blog Post: 03 May 2022
Potential compromise on COVID-19 IPR waiver: deadlock resolved?
Last month, a leaked document regarding the TRIPS Waiver revealed a breakthrough between the EU, South Africa, India and the United States. After 18 months of negotiations, the four parties now have…

Publications: 29 April 2022
Propel: NJDOT Commissioner Gutierrez-Scaccetti and the Trenton NJ MOVES Program
In this episode, New York Intellectual Property partner Paul Keller sits down with New Jersey Department of Transportation Commissioner Diane Gutierrez-Scaccetti.

Publications: 28 April 2022
Into the Metaverse: M&A in the NFT Market in 2022
As the market for NFTs continues to soar, tech and non-tech businesses alike are exploring M&A opportunities to prepare for the metaverse and Web3.
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Introducing our offices in Boston, Los Angeles, New York, Silicon Valley and Washington, D.C.
Recognition
The team has tremendous subject matter expertise and they have distinguished themselves in terms of knowledge.
Chambers USA Guides
They can cut to the heart of the matter and help the business people focus on what really matters and get to a deal. It's that commercial aspect that sets them apart.
Chambers USA Guides
They have a broad global reach, and so whenever there are pieces that are outside of the US I know I have my one go-to person here who can leverage relationships across the globe.
Chambers USA Guides
What they do as a practice is take the time to understand the business of the institutions they are dealing with. They give advice which makes sense under the framework in which you work.
Chambers USA Guides
Media contact
