

United States
Our Boston, Los Angeles, New York, San Francisco, Silicon Valley and Washington, D.C. offices are the core of the global U.S. practice with over 270 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
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
- A multinational pharmaceutical corporation
- A global private equity firm
- A global financial institution
- Volcker Rule
- SAP's acquisition of SuccessFactors Inc.
- A division of a multinational conglomerate
- 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
A multinational pharmaceutical corporation
A global private equity firm
A global financial institution
Volcker Rule
SAP's acquisition of SuccessFactors Inc.
A division of a multinational conglomerate
Richard Fuld
Our offices

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Boston
One Beacon Street
Boston
MA 02108
- +1 857 353 4500
- Send email

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Los Angeles
1900 Avenue of the Stars, Suite 425
Los Angeles
CA 90067
- +1 424 512 7150
- Send email

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

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San Francisco
140 New Montgomery
San Francisco
CA 94105
- +1 415 796 4160
- +1 415 988 TECH
- Send email

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Silicon Valley
550 High Street, Second Floor
Palo Alto
CA 94301
- +1 650 388 1650
- +1 650 999 TECH
- Send email

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

News: 01 December 2023
Allen & Overy (“A&O”) has advised Forevision Holdings Limited, a subsidiary of Foresight Research Pte. Ltd. (“Foresight”), in connection with its acquisition of a controlling stake in Block Bond…

Publications: 30 November 2023
Allen & Overy’s Claire Rajan discusses DOJ’s use of data in FCPA cases with Bloomberg Law
Claire Rajan, litigation partner at Allen & Overy, shared her thoughts with Bloomberg Law on the Department of Justice building bribery cases by using suspicious activity reports submitted by banks.

News: 22 November 2023
Allen & Overy Advises Kinterra Capital on its USD565 million debut fund
Allen & Overy (A&O) announced today that it advised Kinterra Capital (Kinterra), a private equity firm that invests in and develops key critical minerals assets and strategic infrastructure necessary…
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Introducing our offices in Boston, Los Angeles, New York, San Francisco, 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