Jonathan Guynn

Jonathan Guynn focuses on complex commercial litigation, internal investigations, and white collar defense. He has represented individuals and companies in a broad range of industries—including aerospace, telecommunications, biopharmaceuticals, financial services, medical devices, food and beverage, and digital advertising—as well as in complex and sensitive internal investigations and government inquiries.

Mr. Guynn brings a wealth of complex litigation experience to his practice, with an emphasis on trade secret, antitrust, and securities litigation. He capably manages the entire litigation process for clients, from case inception through resolution, including conducting motion practice, fact and expert discovery, taking and defending depositions, and examining witnesses at trial.

In addition, Mr. Guynn maintains an active pro bono practice. He recently prevailed at trial by securing a permanent restraining order for a victim of domestic violence as well as an order for full physical and legal custody of the victim’s young children.

Before joining Hueston Hennigan, Mr. Guynn served as a judicial intern for the Honorable Thomas Griffith of the U.S. Court of Appeals for the D.C. Circuit. During law school, Mr. Guynn was named a Hardy C. Dillard Legal Writing Fellow and served as an editorial board member for the Virginia Law Review.

Representative Experience

  • Representing Southern California Edison and Edison International in litigation arising out of the 2017 Thomas Fire and 2018 Montecito mudslides.
  • Representing a generics and specialty branded pharmaceutical company in nationwide litigation involving allegations of false advertising and deceptive business practices related to its sale of FDA-approved opioid analgesic medications.
  • Broadcom Corporation v. Space Exploration Technologies Corp. Represented SpaceX in a well-publicized dispute involving allegations of unfair competition and trade secret misappropriation. Defeated multiple temporary restraining order (TRO) and preliminary injunction applications that would have disrupted the client’s business needs, thwarted the plaintiff from performing any trade secrets related discovery, and negotiated a favorable settlement.
  • Herrick v. Grindr, LLC et al. Obtained dismissal of all claims against an interactive computer service provider in a cutting-edge Section 230 dispute involving allegations of third-party e-personation and digital harassment.

Read More

  • Represented Western Digital and its SanDisk subsidiaries in their widely publicized dispute with Toshiba over anti-transfer provisions in joint venture agreements governing the manufacture and development of NAND flash memory. The dispute encompassed multiple ICC arbitrations and litigation in the California trial and appellate courts, where SanDisk secured injunctive relief in aid of the arbitrations.
  • Secured a declination letter for a Fortune 500 medical device manufacturer in criminal investigation concerning alleged violations of the Food, Drug, and Cosmetic Act, including allegations of knowingly manufacturing adulterated and misbranded medical devices and violations of the FDA’s Current Good Manufacturing Practices.
  • Represented a business executive at a digital advertising and technology firm in connection with a multiyear investigation by the Securities and Exchange Commission and U.S. Attorney’s Office involving allegations of securities fraud. No action was taken against the executive.

Jonathan Guynn

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University of Virginia School of Law (J.D., 2013)

Brigham Young University (B.A. Economics and History, 2010) cum laude


Hon. Kent A. Jordan, U.S. Court of Appeals, Third Circuit

Hon. David G. Campbell, U.S. District Court, District of Arizona


The Political Economy of Financial Rulemaking After Business Roundtable 99 Va. L. Rev. 641 (2013)



New York