O’Melveny Worldwide

Business & Commercial Litigation

Where borders blur and business interests clash, leading companies turn to O’Melveny with their must-win disputes.

Houses a strong complement of famed litigators with expertise covering a broad range of complex issues.Chambers USA, General Commercial Litigation: The Elite

Where borders blur and business interests clash, leading companies turn to O’Melveny with their must-win disputes.

Houses a strong complement of famed litigators with expertise covering a broad range of complex issues.Chambers USA, General Commercial Litigation: The Elite

O’Melveny’s powerhouse litigators understand clients’ business objectives and relentlessly pursue the best outcomes in high-stakes commercial disputes. We represent companies, executives, and corporate directors in every kind of litigation, from securities and financial-services cases to consumer class actions, antitrust matters, and disputes over contracts, licensing, and intellectual property. Our team has earned clients’ trust in a range of industries, including technology, financial services, entertainment & media, insurance, real estate, life sciences, aerospace, energy, and healthcare.

Backed by O’Melveny’s effective and aggressive advocacy skills, our clients have prevailed in countless trials and arbitrations and resolved countless more conflicts through alternative dispute resolution and settlement. From early strategic briefing through trials and appeals, our team has fought and won bet-the-company cases for some of the world’s largest companies. That record of success is why clients often bring in O’Melveny to replace original counsel in complex disputes.

American Airlines

Secured a win for what was previously US Airways in a closely watched re-trial of a landmark monopolization and rule-of-reason two-sided market case brought against travel-booking company Sabre Corp.

Chubb Group

Stepped in as lead trial counsel for Chubb Group and secured a jury trial victory in an Eastern District of New York case involving storm damage from Hurricane Sandy, establishing that the flood exclusion in plaintiff’s insurance policy barred coverage for its hurricane-related flood damage.

C. R. Bard

Obtained a complete victory for medical device maker C. R. Bard in a three-week jury trial, demonstrating that the company did not violate antitrust laws by selling its cardiovascular catheters together with a special tool for ensuring proper insertion.

Global Capital Equipment Supplier

Achieved a successful resolution of shareholder litigation and post-closing damages litigation arising from its US$860 million acquisition of a global semiconductor fabricator.

Goldman Sachs-led Underwriting Syndicates

Representing an underwriting syndicate led by Goldman Sachs in federal and New York state securities cases connected to the IPO of DiDi Global, an online ride-hailing platform forced to delist after violating data-privacy rules.


Stepping in just before trial, won a jury verdict for the tech giant, defeating patent infringement claims against Google’s popular smart-home Nest Hub devices. 

Multinational Consumer and Investment Bank

Defended multiple derivative actions challenging its US$4 billion acquisition of a mortgage lender, including successor liability, de facto merger, implied assumption, and fraudulent conveyance claims.


After a jury ordered NBCU to pay US$71 million in a profit participation dispute involving the iconic television series Columbo, O’Melveny stepped in, convinced the judge to set aside the award and grant a new trial—a victory affirmed by the California Court of Appeal.

Private Equity Firm

Defended in class action litigation alleging breach of fiduciary duties to public shareholders in its US$3.1 billion sale of a chemical company to a Korea-based consortium.


Prevailed in multiple cases alleging that Samsung and others conspired to restrict the global supply of DRAM—a vital component of computers, smartphones, and countless other devices—most recently convincing the Ninth Circuit to reject an attempt by consumers to resurrect a putative class action.

Samsung and LG Electronics

Secured precedent-setting victories on motions to transfer patent cases out of the Western District of Texas, weakening patent plaintiffs’ ability to handpick their venues and cementing our reputation as a leading force in the area.

Shanda Games

Secured dismissal with prejudice of a securities class action alleging that Shanghai-based game developer Shanda underpaid US shareholders when it went private.

Townsend Group

Won a bet-the-company trial for real estate consultancy Townsend Group and two of its partners, convincing a Texas jury that the homecourt plaintiff—the Dallas Police & Fire Pension System—bore primary responsibility for buying hundreds of millions of dollars of real estate just before the 2008 financial crisis.

UnitedHealth Group

Represent UnitedHealth subsidiaries in multiple lawsuits filed by out-of-network provider groups affiliated with one of the nation’s largest physician staffing and management companies in a dispute over reimbursement rates.

UnitedHealth Group

Secured dismissal of a putative class action challenging licensing arrangements for United Health’s AARP-branded Medigap insurance, an attempt by the plaintiff to discount his legally mandated Medigap insurance premiums.

US-Based Regional Airline

Successfully defended from shareholder claims arising from its US$4 billion acquisition of a budget airline.

Representative Clients
C.R. Bard
Endo Pharmaceuticals
Goldman Sachs
LG Electronics
Maxar Technologies
Micron Technology
Morgan Stanley
SK hynix
Sonim Technologies
TD Bank
The Townsend Group
Veeco Instruments

In its “Litigation Department of the Year” competition, The American Lawyer has recognized O’Melveny’s courtroom skills and versatility, “geographic and industry breadth befitting a first-tier national litigation shop,” and string of “stunning wins.”

“The firm is equally proficient handling commercial litigation and securities disputes across industries including energy, retail, media and entertainment and financial services. It offers a strong platform for companies with interests in Asia, demonstrating significant experience in assisting China-based businesses in US litigation.”

–Chambers USA, General Commercial Litigation: The Elite

“O’Melveny & Myers are true specialists in litigation. They’re extremely talented, wonderful in trial and willing to take things to trial—they really fight [in] the client’s corner.”

Client Testimonial, Chambers USA, Litigation: General Commercial: The Elite

“They have a team of strong advocates and strategic thinkers who have an excellent knowledge of the law.”

Client Testimonial, Chambers USA, General Commercial Litigation: The Elite