Largely based in New York, the white-collar group at A&O Shearman has an ‘incredibly deep’ talent bench that routinely represents corporates and individuals in a diverse range of investigations and litigation. The team is especially capable of handling multi-jurisdictional matters, and has extensive experience in industries such as financial services, energy, life sciences, healthcare, and tech. The practice is co-headed by John Nathanson, praised for his ‘unparalleled’ expertise in the crypto space, who specializes in regulatory matters, internal investigations, and financial litigation, and Katherine Stoller, who focuses on criminal and regulatory enforcement matters and internal investigations involving allegations of money laundering, economic sanctions violations, financial fraud, corruption, and workplace misconduct. Seasoned trial lawyer, Stephen Fishbein, who is knowledgeable in antritrust and compliance, is also a key member of the team. David Esseks and Eugene Ingoglia started their own firm, Esseks Ingoglia, in July 2025.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
‘The team is very client-focused and very practical. I also consider them to be as smart as they come.’
‘Katherine Stoller was very practical, very strategic, and really careful with excellent judgment.'
‘Their cross-border work is superb, and their talent bench is incredibly deep.’
‘Adam Schwartz is a superstar in their white-collar practice. He has a ton of experience, knows everyone in town, has great judgment, and brings in a lot of work.’
‘Incredibly deep industry knowledge, which is particularly important in the financial services and crypto space. This coupled with sophisticated, nuanced legal observation and analysis made the A&OS team invaluable to our project.'
‘John Nathanson's crypto expertise that is unparalleled. Sharp wit, brilliant mind and very solutions driven. Excellent communicator and even better interviewer.'
Key clients
- Danske Bank
- The DOJ Monitor (Frances McLeod, Forensic Risk Advisory)
- UniCredit
- KuCoin
Work highlights
Represented KuCoin in its DOJ criminal investigation and CFTC regulatory investigation, reaching a $297m settlement with the U.S. Department of Justice in January 2025.
Serving as counsel to the Monitor in connection with Binance Holdings Limited’s $4.3m DOJ settlement and guilty plea resolving DOJ’s investigation into violations related to the Bank Secrecy Act, failure to register as a money transmitting business, and IEEPA.
Represented Danske Bank in investigations by DOJ, the SEC, Danish and French criminal authorities arising from its former Estonian branch, resulting in a $2b global settlement.
Lawyers
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Other key lawyers
Stephen Fishbein; Adam Hakki; Christopher LaVigne; Julian Moore; Adam Schwartz