Contact Lawrence C. Locker

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M. Quinn Oppenheim

Litigation Attorney

315 Fifth Avenue S, Suite 1000
Seattle WA 98104

©2023 Summit Law Group PLLC

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Lawrence C. Locker


(206) 676-7060

Profile Introduction

Larry is an accomplished trial lawyer and counselor who assists a wide range of clients in business disputes, including corporate governance and control, intellectual property, and insurance coverage cases. With decades of trial experience, Larry has represented clients in all aspects of the litigation process in numerous courts in Washington and other jurisdictions. He has also successfully represented clients in arbitrations and other alternative dispute resolution proceedings.



Lawrence C. Locker
Rated by Super Lawyers

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America's Top 100High Stakes Litigators 2018® Recipient Award



  • American Bar Association, Co-Chair, International Human Rights Committee, ABA Section of International Law (2020 - 2022)
  • Washington State Bar Association
  • King County Bar Association
  • Federal Bar Association
  • State Bar of California


  • Columbia University
    Master of International Affairs
  • UCLA School of Law
    Distinguished Advocate, UCLA Moot Court Honors Program
  • UCLA
    BA, magna cum laude, Economics

Bar Admissions

  • California
  • Washington


  • Washington Super Lawyers, (2012 - present)
  • Martindale-Hubbell:, AV Rated-Preeminent (2011 - present); peer review comments include:
    • "He is a lawyer of exceptional integrity and ability. He is a credit to the profession."
    • "Larry Locker is a first-class trial lawyer, with particular strength in handling witnesses in the courtroom."
    • "Larry is an excellent lawyer with good judgment."


  • Fellow, American Bar Foundation
  • Seattle Metropolitan magazine Top Lawyers
  • Litigation Counsel of America, Fellow
  • Council on Litigation Management, Member

Publications & Speaking Engagements


  • “Black Lives Matter Calls for Action Include the Creation of a U.S. Truth Commission,” ABA International Human Rights Committee Newsletter (Summer 2020, revised edition, vol. 3)
  • "Minority Report: The Future of Legal Services and AI," Chambers and Partners, eDiscovery & Disclosure 2019, Trends and Developments (January 2019)
  • “Admissibility of Scientific and Other Expert Testimony in Federal and Washington Courts,” National Business Institute (2008 and 2009)
  • “New Horizons — The False Claims Act Outside of the Departments of Health and Human Services,” American Bar Association, National Institute on the Civil False Claims Act and Qui Tam Enforcement (2000)
  •  “Report to the Truth Commission for El Salvador,” Co-Author, article setting forth the findings and recommendations of the legal delegation that traveled to El Salvador and investigated civilian deaths resulting from an airstrike on a village (1992)


Speaking Engagements:

  • “El Salvador Truth Commission: Lessons and Reflections,” Washington State Bar Association, World Peace Through Law Section (2020)
  • “Evidence and Expert Testimony Best Practices,” National Business Institute (December 2009 and November 2008)
  • “Intellectual Property Protection Strategy,” CFO Roundtable (October 2007)
  • “Contracts and Negotiations: The Litigation Angle in Drafting Commercial Agreements,” Washington State Bar Association (October 2006)

Representative Cases/Matters

  • Obtained judgment following a month-long trial for a Russian citizen (and former owner of intellectual property rights to the computer game Tetris) for fraud and breach of fiduciary duty against former employees and agents, residents of Seattle. The judgment included removal of defendants as officers and directors of the company, return of valuable technology licensing rights, return of real estate worth more than $1 million, a $3.1 million money judgment, and an award of attorneys’ fees of $900,000. Defendants were awarded nothing on their $5 million counterclaim.
  • Represented a software licensor to recover royalties due under a license agreement; the case settled favorably.
  • Served as counsel for a manufacturing corporation in multi-ten-million-dollar case seeking reimbursement for environmental cleanup costs under insurance policies issued to the corporation; the case settled favorably.
  • Served as counsel for a small business owner in an action against an insurance company to establish defense and indemnity coverage for environmental cleanup costs and to recover damages for bad faith insurance practices; the case settled favorably.
  • Obtained for a corporation client an order granting a preliminary injunction against a former chief executive officer and majority shareholder, prohibiting him from representing to the corporation’s customers and others that he holds ownership rights in the company’s patented intellectual property; the case settled favorably as a result of the order.
  • Represented a software development company and obtained more than $40 million in the negotiated settlement of a dispute over a software development contract.
  • Recovered a foreign company’s entire $2 million investment in a local technology startup company, in a case alleging that through fraud and accounting artifice, the investment money had been diverted by the startup’s parent company and officers.
  • Successfully defended a corporation in a multimillion-dollar claim alleging unlawful spamming and unauthorized access to an Internet service provider’s servers.
  • Defended a corporate officer and director in a lawsuit by an investor seeking more than $1 million; the case settled for a small fraction of the claim.
  • Served as counsel for the defendant estate in an action brought by a plaintiff claiming a one-half interest in the defendant’s real property; the case settled during trial for a small fraction of the claim.
  • Represented the plaintiff in an arbitration proceeding involving claims of misappropriation of trade secrets and breach of software license claims; obtained a favorable settlement, including recovery of attorney’s fees.
  • Represented a polymer plastics manufacturing corporation in prosecution of two patent infringement cases with antitrust counterclaims; obtained favorable stipulated judgments on the patents, and dismissal of both counterclaims.
  • Served as member of the plaintiff’s legal team in a large antitrust case (CalderaIncv. MicrosoftInc.); the case involved complex intellectual property and software licensing issues, and resulted in a multi-hundred-million-dollar settlement.