Department profile
A&O Shearman

Litigation: Securities

USA Guide 2026 : New York


A&O Shearman

Rankings

About

Provided by A&O Shearman

Litigation, Arbitration and Dispute Resolution

Our Dispute Resolution practice offers:

  • A full-service U.S. litigation practice. The practice serves clients in significant disputes including: financial institutions litigation, antitrust litigation and criminal/cartel investigations, complex commercial litigation, securities litigation, regulatory and white collar defense, corruption investigations and regulatory compliance, international disputes, professional liability, and internal investigations and special investigations for boards.​

  • A deep-bench of experienced trial lawyers. The U.S. litigation practice is led by several senior litigators, who have experience litigating and trying cases in a wide variety of areas, with a special emphasis on the defense of federal criminal and regulatory cases as well as federal and state civil litigation. The practice is driven by several senior litigators who have served in senior positions in the government.

  • Relationships with leading regulatory bodies. The practice is composed of a team of lawyers that have deeply entrenched relationships and first-hand experience dealing with U.S. regulatory agencies.

  • An integrated global firm with unmatched cross-border capability. Allen & Overy is able to call upon the resources of the firm and utilize those close working relationships that exist among our global network, enabling us to provide truly integrated legal services and ensure smooth coordination and closing of cross-border transactions.

Chambers Review

Provided by Chambers

Litigation: Securities - New York

Band 2

Band 2


What the Team is Known For

A&O Shearman demonstrates strength across an impressive range of civil disputes, particularly those arising from the financial services industry. It is well regarded for its expert defense of securities offerings class actions and RMBS litigation, drawing on additional strength in investigations and enforcement proceedings. The firm is also highly active in market manipulation and rate-fixing cases on behalf of financial clients. Its broader commercial litigation practice features strengths in areas including insurance disputes, bankruptcy and antitrust disputes. Its experience includes disputes involving appellate proceedings. The firm possesses excellent cross-border capabilities, with strong coverage of European and Asian jurisdictions.

Work Highlights

Provided by Chambers

  • A&O Shearman represented Paramount Global in winning a complete appellate victory in a securities class action litigation arising from the historic collapse of Archegos Capital Management.

Strengths

Provided by Chambers

  • A&O Shearman's attorneys are true experts in high-risk litigation. They are innovative in their approach and understand jurisdictions. They are aggressive litigators in pursuing our positions in cases.

    Litigation: Securities respondentUSA
  • A&O Shearman has a great litigation practice.

    Litigation: Securities respondentUSA
  • A&O Shearman's lawyers are incredibly hardworking and strong trial lawyers. The client service is also impeccable.

    Litigation: Securities respondentUSA
  • A&O Shearman does a fantastic job. The firm always gets good results, it's good at negotiations and manages client expectations.

    Litigation: Securities respondentUSA

Notable Practitioners

Provided by Chambers

  • Star IndividualsAdam S Hakki
    Star IndividualsAdam S Hakki

    Adam S Hakki

    Adam Hakki has a leading practice representing top financial institutions in a whole host of complex securities and financial litigation. He is particularly prominent in representing underwriters.

    • I don't think there's anything he couldn't litigate, he is a very rare talent.

      Litigation: Securities respondentUSA
    • Adam has an encyclopedic knowledge of the current state of the law across all legal services.

      Litigation: Securities respondentUSA
  • Band 2Daniel Lewis
    Band 2Daniel Lewis

    Daniel Lewis

    Daniel Lewis achieves excellent results in his work for financial clients, and is well versed in underwriter representation as well as in MBS litigation.
    • Daniel is a strong, strategic thinker with a good command of the facts.

      Litigation: Securities respondentUSA
    • Daniel is an excellent attorney. He offers very sound advice and judgment.

      Litigation: Securities respondentUSA
    • Daniel is wonderful, strategic and aggressive.

      Litigation: Securities respondentUSA

Ranked Individuals at A&O Shearman (2)

New York

Members

Provided by A&O Shearman

A&O Shearman has rankings in the following guides

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