Grant Davis-Denny

Munger, Tolles & Olson LLP

$ $$$

Grand Lower 350
Los Angeles 90071 CA US

Grant A. Davis-Denny is a litigation partner at Munger, Tolles & Olson whose practice focuses on taking complex matters to trial and counseling clients on rapidly changing areas of law.

Mr. Davis-Denny’s trial experience includes some of the country’s most complex cases, such as the Deepwater Horizon litigation following the 2010 oil spill in the Gulf of Mexico as well as a three-month antitrust trial involving billions of dollars in claimed damages.

Mr. Davis-Denny also counsels companies in the areas of data security, privacy and antitrust. His data security and privacy practice includes proactive compliance advice, incident response and litigation. Mr. Davis-Denny holds a CIPP/US certification from the International Association of Privacy Professionals.

In the area of antitrust, Mr. Davis-Denny helps companies design effective compliance programs, conduct internal investigations and litigate claims of anticompetitive conduct.

Key Representations:

  • Antitrust
    • A technology firm in conducting internal investigations into alleged anti-competitive conduct.
    • A technology company in connection with a three-month jury trial involving multi-billion dollar antitrust claims against the world’s largest computer memory manufacturers.
    • A computer hardware company in providing counsel on improvements to its antitrust compliance program.
    • An energy company in providing counsel regarding the antitrust implications of a joint venture.
  • Data Security and Privacy
    • Representing companies in responding to data breach and ransom demand incidents involving the theft of sensitive customer information, including advising on data breach notification obligations.
    • Counseling companies on a variety of proactive data security issues, including cyber-insurance, vendor management, and data minimization strategies.
    • Obtaining dismissal of a claim brought under California’s Confidentiality of Medical Information Act relating to the theft of computers containing personal health information.
  • Environmental and Energy
    • Transocean, a drilling company, in litigation arising from the BP oil spill in the Gulf of Mexico. A pipeline company in connection with a criminal trial and civil litigation arising out of an oil release.
    • An oil and gas production company in defending against claims that the company had breached its duty to perform as a prudent operator under a unit operating agreement.
    • A transportation company in successfully resolving government claims regarding an accidental release of diesel into a California river.
  • Intellectual Property
    • Technology companies in a patent infringement lawsuit related to web-enabled database management systems.
    • A best-selling author and movie producer in obtaining a favorable jury verdict in a $100 million copyright case in a Chicago federal trial.
  • Professional Liability
    • A law firm and two of its attorneys in a legal malpractice arbitration that resulted in an award for his clients from the arbitrator and the dismissal of the plaintiff’s claims.
  • Elections, First Amendment and Administrative Law
    • Advising companies on policies for complying with federal, state, and local campaign finance, procurement, and gift laws.
    • Filing amicus curiae briefs on behalf of members of Congress, Common Cause and scholars in the U.S. Supreme Court.
    • Obtaining a temporary restraining order against the California Secretary of State in litigation over ballot placement of a statewide initiative.
    • Securing a permanent injunction against a California statewide agency for violating the Administrative Procedures Act, and successfully defending that injunction in the California Court of Appeal.

Mr. Davis-Denny has served as a deputy city attorney for the Los Angeles city attorney’s office and tried three criminal cases to verdict. Mr. Davis-Denny is a member of the board of directors of the Western Center on Law and Poverty and the board of directors of the Los Angeles Metropolitan Debate League.

He is also a member and former chair of the board of directors of California Common Cause and a former member of the Los Angeles County Bar Association’s Judicial Election Evaluation Committee. At Munger, Tolles & Olson, he is the co-chair of the firm’s Information Technology committee.

Mr. Davis-Denny graduated from UCLA School of Law in 2003 where he was elected to the Order of the Coif, was a member of the UCLA Law Review, and was a member of the Program in Public Interest Law and Policy. Prior to attending law school, Mr. Davis-Denny worked for elected officials Kathleen Sebelius and Tom Torlakson.


  • UCLA School of Law (J.D., 2003)
    • Order of the Coif

Bar Admissions : California


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Grand Lower 350
Los Angeles 90071 CA US
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