The choice of defense counsel at the beginning of a securities case can make the difference between a favorable, early resolution and a prolonged litigation ...

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Maeve O'Connor

Jonathan R. Tuttle

Ranked as a leading New York and national firm for Securities Litigation by Chambers USA (2025)

I am really impressed with the firm. They are so client focused, knowledgeable and provide great advice on a spectrum of issues.

The team works cohesively, shows technical expertise and sound strategic judgment.

Across the board Debevoise & Plimpton does an excellent job and is outstanding in terms of client service.

A top-notch firm of smart, practical lawyers. They have a great mix of legal knowledge and are practical in their approach to counseling clients.

—Chambers USA, 2020-2025

Ranked among the leading U.S. firms for Securities Litigation (Defense) by The Legal 500 US (2025)

The firm has a crack team of extremely talented litigators.

It is a highly experienced team, especially in representing special litigation committees.

Top notch in every way. This is an extremely competent practice and the type of team you hire for your most significant matters.

The Debevoise securities litigation team stands out for its sophistication, its overall quality, and its stellar track record.

—The Legal 500 US, 2021-2025

Recognized as a top tier firm in Securities Litigation by Benchmark Litigation (2025)

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The choice of defense counsel at the beginning of a securities case can make the difference between a favorable, early resolution and a prolonged litigation that imposes unnecessarily on management and racks up costs that could have been avoided. The view taken by Debevoise’s securities litigation team is that defense counsel’s experience and the added perspective it brings, including insight into the legal and business implications of high-risk litigation, and sophisticated and creative thinking about the best strategy to pursue in each particular case, are conducive to the most effective representation. These are the hallmarks of the firm’s approach to every securities case – large or small.Debevoise litigators have considerable experience in all types of securities disputes, from federal securities class action litigation to state court M&A and fiduciary duty litigation to multijurisdictional and multidisciplinary matters involving overlapping civil litigation, federal and state enforcement actions and related legislative inquiries. Securities litigation has long been a core component of the firm’s litigation practice, and the group has been defending clients in many such matters in recent years, achieving notable victories and favorable settlements.Many of the group’s securities cases have involved simultaneous multidistrict litigation, multijurisdictional enforcement proceedings and Congressional inquiries. Debevoise’s securities litigators have extensive experience dealing with the problems raised by parallel proceedings - including proceedings in the U.S. and in foreign jurisdictions - that involve disparate procedures and legal standards.Debevoise’s litigators are highly collaborative, drawing on the expertise of lawyers throughout the firm to provide advice that is both comprehensive and commercial. The securities litigation partners work seamlessly with the firm’s highly rated domestic and international white collar and enforcement practices, ensuring that regardless of how a securities matter develops, the clients’ interests are handled strategically and skillfully.