Department profile
O'Melveny & Myers LLP

Litigation: Securities

USA Guide 2026 : California

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O'Melveny & Myers LLP

Rankings

Chambers Review

Provided by Chambers

Litigation: Securities - California

Band 3

What the Team is Known For

O'Melveny & Myers houses a strong complement of famed litigators with expertise covering a broad range of complex issues. The firm is equally proficient handling commercial litigation and securities disputes across industries including energy, retail, media and entertainment and financial services. The team offers a strong platform for companies with interests in Asia, demonstrating significant experience in assisting China-based businesses in US litigation.

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Work Highlights

Provided by Chambers

  • O'Melveny & Meyers LLP represented Warner Bros. Discovery and its subsidiary DC Comics in a lawsuit brought by the estate of Joseph Shuster, co-creator of Superman, that claimed the company and its affiliates lacked the rights to release the movie in ten countries, seeking an injunction.

Strengths

Provided by Chambers

  • The team is always available when needed and proactively ensures my understanding of where we are in the process.

    Litigation: Securities respondentUSA

  • They are high power, comprehensive and leave no stone left unturned.

    Litigation: Securities respondentUSA

  • O’Melveny & Myers has an exceptionally deep and versatile litigation bench. The team combines technical mastery, strategic insight and strong courtroom experience.

    Litigation: Securities respondentUSA

  • I have seen the highest level partners at O'Melveny & Meyers manage litigation in the most cost-efficient manner possible.

    Litigation: Securities respondentUSA

Notable Practitioners

Provided by Chambers

  • Daniel Petrocelli
    Daniel Petrocelli

    Daniel Petrocelli

    Daniel Petrocelli wins praise from all corners of the market for his wealth of expertise in big-ticket litigation. He is regularly called upon by household-name clients, with particular experience acting for clients from the media and entertainment sector.

    • Daniel Petrocelli is just beyond a superstar. Judges respect him and he delivers excellent client service.

      Litigation: Securities respondentUSA

    • Dan's reputation is well-earned. He brings both pragmatism and a keen strategic bent to his legal advice.

      Litigation: Securities respondentUSA

    • He is a really excellent trial lawyer.

      Litigation: Securities respondentUSA

    • Dan is a veteran. He is masterful at taking depositions, oral arguments and overall legal strategy.

      Litigation: Securities respondentUSA

    • He is one of the most well-known lawyers, he has a significant reputation.

      Litigation: Securities respondentUSA
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  • David Marroso
    David Marroso

    David Marroso

    David Marroso is held in high esteem by a range of clients from the financial services to media and entertainment industries, who he represents in a broad array of commercial disputes.

    • David Marroso is an overall expert our company relies on for guidance. He has earned the trust of everyone in our organization.

      Litigation: Securities respondentUSA

    • David is a bet-the-company kind of lawyer. He is my first call when the stakes are high.

      Litigation: Securities respondentUSA

    • David Marroso is a deep thinker. He is strategic, analytical and a good listener.

      Litigation: Securities respondentUSA

    • David is fantastic in the courtroom. He is a great storyteller and the jury seems to love him.

      Litigation: Securities respondentUSA
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  • Matthew Close
    Matthew Close

    Matthew Close

    Matthew Close routinely represents clients in large-scale securities class actions and derivative suits.

    • Matt has great judgment and presence. He knows how to maneuver cases to accomplish results.

      Litigation: Securities respondentUSA

    • In spite of Matt’s extensive expertise, he took the time to explain every detail and potential path to me.

      Litigation: Securities respondentUSA
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  • Matt Powers
    Matt Powers

    Matt Powers

    As co-chair of O'Melveny & Myers' consumer class actions practice, Matt Powers possesses an impressive breadth of experience acting for manufacturers and retailers spanning the consumer products, financial services and pharmaceutical sectors.

    • Matt is very responsive and his feedback is both well thought-out and executable.

      Litigation: Securities respondentUSA

    • Matt is highly responsive and practical.

      Litigation: Securities respondentUSA
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  • Matthew Kline
    Matthew Kline

    Matthew Kline

    Matthew Kline is an experienced litigator, with expertise in a broad range of sectors, such as entertainment and technology.

    • Matthew Kline is our go-to for difficult, complex cases. He is one of the best strategists out there.

      Litigation: Securities respondentUSA

    • Part of Matt's strength is the team around him and he's the person who built and sustained it. His leadership is second to none.

      Litigation: Securities respondentUSA
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  • Amy S Park
    Amy S Park

    Amy S Park

    Amy Park is a well-regarded securities litigator noted for her experienced handling of class actions, M&A-related disputes and corporate governance matters.

    • Amy is able to seamlessly blend complicated fact patterns, critical legal theories and the business perspective.

      Litigation: Securities respondentUSA

    • Amy's legal expertise and judgment are matched only by her zealous tenacity and poignant advocacy.

      Litigation: Securities respondentUSA
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Ranked Individuals at O'Melveny & Myers LLP (6)

California

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