In high-stakes litigation, every move counts. From the initial positioning of the facts and issues, to trial of the case, to disposition of the appeal, smart moves make the difference between a favorable resolution and a costly judgment.

At O’Melveny, significant, bet-the-company cases are a specialty. In the past four years alone, we have helped our clients bring nearly 30 cases to verdict. In state court and federal court and on appeal, from California to New York and in between—our award-winning team has helped clients prevail in some of the country’s most closely watched legal battles.

Although most large firms can litigate a case, few excel at shaping a dispute for trial. No matter where the assignment is or what substantive law is at issue, we draw on every available resource to put the best team on the field. Through cross-practice and cross-border collaboration, our trial lawyers can and do cover any area of law, in any jurisdiction.

At every stage of the litigation process, we help clients make the right moves.

What Sets Us Apart

    • US Legal 500 has called us a “top-tier firm for trial lawyers,” and noted that we offer “a trial-ready approach” that ensures credibility before regulatory agencies.

    • Sources consulted by Chambers USA commend our skill at “thinking through what the end game is and how we will get there,” and note that clients involved in trials with multijurisdictional elements “benefit from the firm’s global community of lawyers.”

    • The American Lawyer has repeatedly recognized our ability to secure “hard-fought trial wins” in its Litigation Department of the Year contest.

Allergan, Inc.

O’Melveny prevailed at trial on behalf of Allergan in a trade secrets case, securing a rare “head start” injunction. Read

Case Study: Johnson & Johnson

In what The New York Times calls “one of the most complicated and gargantuan legal battles in American history,” O’Melveny is lead litigation counsel for Johnson & Johnson and subsidiary Janssen Pharmaceuticals as the companies confront thousands of claims seeking to hold them liable for the country’s opioid-abuse epidemic. Read

Former Chief Financial Officer

O’Melveny achieved a complete trial victory in SEC v. Tekulve, et al., an enforcement action by the SEC against the former CFO of a publicly traded water purification company in Southern California. Read

Guess Inc.

O’Melveny defended fashion and apparel company Guess, Inc. in a trademark infringement suit filed by rival Gucci, Inc. Read


O’Melveny achieved a US$1 billion jury verdict for Lennar, a Fortune 500 homebuilder and land developer. Read

Mentor Graphics Corporation

O’Melveny secured another victory for Mentor Graphics Corp., a maker of electronic design automation software and hardware, when a Federal Circuit panel affirmed a US$36 million verdict and a permanent injunction against Synopsys Inc. in a long-running patent dispute.


Quiksilver, Inc.

O’Melveny prevailed at trial for clients Quiksilver and QS Wholesale, Inc. (Quiksilver), in a trademark case filed against volleyball uniform maker Rox Volleyball Inc. Read
    • ACE Companies
    • Ford Motor Co.
    • Guess, Inc.
    • Lennar Corp.
    • Mentor Graphics Corporation
    • Quiksilver, Inc.
    • Samsung
    • Suntech Power Holdings