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Brandon O'Neil



ONeil Brandon
Brandon O'Neil



Brandon’s practice focuses on regulatory investigations and litigation, and includes the representation of both institutions and individuals in complex regulatory investigations, securities laws enforcement actions and internal investigations. Brandon also has experience in investment treaty arbitration and complex commercial litigation.

News & insights

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Publications: 13 JANUARY 2020

The von der Leyen Commission

The European Commission led by Ursula von der Leyen took office on 1 December 2019, following changes required as a result of the European Parliament rejecting three of the candidate Commissioners originally put forward. 

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News: 09 JANUARY 2020

Global trends in private M&A 2020

We have recently produced a client presentation on global trends in private M&A. Our findings draw on an in-depth analysis of more than 1,250 private M&A deals that A&O has advised on globally over the last eight years, looking at deal dynamics, execution risks and deal terms. This has given us exceptional insight into global and regional trends in market practice.

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News: 30 OCTOBER 2019

International tier one telecoms carrier fined for sanctions breach

The UK financial sanctions enforcer, the Office of Financial Sanctions Implementation (OFSI), announced on 28 October a fine of a UK subsidiary of an international tier 1 telecoms carrier (the Company)  for indirectly facilitating international telephone calls to SyriaTel, a designated entity  under EU financial sanctions on Syria, implemented by the Syria (European Union Financial Sanctions) Regulations 2012.   

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Publications: 22 MAY 2019

GDPR for litigators 2019

Virtually all evidence, whether in litigation or arbitration or relating to investigations carried out by regulators or enforcement authorities, will contain some personal data. A year on from the EU General Data Protection Regulation (universally known as GDPR) coming into force, we examine what it means for disputes and contentious regulatory/enforcement matters, focusing on three areas. 

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Allen & Overy LLP
One Bishops Square
E1 6AD

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Admitted: Bar of the State of New York, 2009

Admitted: U.S. District Court, Southern District of New York, 2009  


J.D., Columbia Law School, 2008

M.A., University of Wyoming, 2004 

B.A., University of Wyoming, Phi Beta Kappa, 1999