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Grayson W. Marshall III

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Trey Marshall is an associate in the Litigation department in our San Francisco office. His practice is focused on complex commercial, technology, and real estate litigation. Trey has tried many cases throughout state and federal courts in California.

Prior to joining Allen Matkins, Trey was an associate at Schiff Hardin LLP. Previously, Trey was a deputy attorney general in the Civil Division at the California Department of Justice in San Francisco, California.


  • California Bar Association
  • BASF
  • ABTL


Trey received his J.D., cum laude, from the University of California Hastings College of the Law in 2011. He received his B.A., in legal studies, with honors, from the University of California, Berkeley in 2006. While in law school, Trey served as a judicial extern for both the Honorable Marvin R. Baxter of the Supreme Court of California and the Honorable William Q. Hayes of the U.S. District Court, Southern District of California.


  • California


  • U.S. Court of Appeals for the Ninth Circuit
  • U.S. District Courts for the Northern, Eastern, and Central Districts of California
  • All California state courts