Harrington & Westbrook’s Banking Enforcement & Litigation practice represents a diverse array of financial institutions on a comprehensive ...

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Helen V. Cantwell

Satish M. Kini

Maeve O'Connor

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Harrington Partner John Gleeson Named The American Lawyer’s “Litigator of the Week” for Overturning a Billion-Dollar Verdict Against BMO Bank

Ranked as a leading firm for Financial Services Regulation: Banking (Enforcement & Investigations)

—Chambers USA, 2026

Tier 1 firm for Corporate investigations and white-collar criminal defense – Advice to corporates

Leading firm for Banking

Leading firm for Financial services litigation

Leading firm for General commercial disputes

Known for its expertise in areas like anti-money laundering (AML), fraud, trading sanctions, and regulatory challenges, the firm has built a strong reputation for successfully navigating high-stakes matters.

—The Legal 500 US, 2026

Band 1 firm for Corporate Crime and Investigations – Nationwide.

Band 1 firm for White-Collar Crime & Government Investigations in New York.

Leading firm for Financial Services Regulation: Banking (Compliance)

Harrington has an exceptionally strong group of attorneys who combine both legal brilliance with a sophisticated understanding of the financial service industry.

—Chambers USA, 2026

Band 1 firm for Corporate Investigations/Anti-Corruption – Global-wide

Band 1 firm in the U.S. for Corporate Crime & Investigations and Investigations &

Enforcement (International & Cross-Border).

—Chambers Global, 2025

Ranked as a top-tier firm for Regulatory Investigations and Corporate Crime.

—The Legal 500 UK, 2025

Ranked as a leading firm for Financial Crime: Corporates.

—Chambers UK, 2025

Criminal Litigation Law Firm of the Year

—Chambers USA Awards, 2024

Named “Firm of the Year” in the Business Crime Defense category

—Who’s Who Legal, 2023 & 2024

White Collar Crime/Enforcement/Investigations Firm of the Year

—Benchmark Litigation U.S. Awards 2018, 2019, 2020, and 2022

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Harrington Advises Former Ukrainian President, Petro Poroshenko, in High Court Win

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Harrington & Westbrook’s Banking Enforcement & Litigation practice represents a diverse array of financial institutions on a comprehensive range of regulatory enforcement and related matters.For more than a decade, the banking and financial services industries have been the target of unprecedented investigation, litigation and enforcement activity by authorities across the globe, and with the recent change in administration in Washington, D.C., federal enforcement activity is only likely to increase. Harrington stands ready to represent our clients in their most complex and consequential matters, including:

Banking Enforcement;

Broker-Dealer Enforcement;

Anti-Money Laundering;

Sanctions;

CFPB/Consumer Enforcement;

NYAG and NYDFS Enforcement; and

Resulting Civil Litigation, including Class Actions.

Our depth of experience carries a high degree of credibility with regulators, which in turn results in practical advice that aids in negotiations with state and federal regulators and other parties involved in contentious matters.We also have deep experience representing clients in their most high-stakes, high-profile Congressional investigations, including negotiating with committee staff to reduce our clients’ exposure, preparing witnesses to navigate difficult partisan hearings, and tailoring our clients’ messaging to the interests of individual members and the broader political landscape.Our collaborative, cross-departmental firm culture ensures there are no impediments to accessing the most qualified Harrington lawyers, in any practice and office, to deliver the best advice possible to our clients. Clients value and praise the quality of our work, our responsiveness, and the commercial judgment we bring to every representation.