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225 South Lake Avenue, Suite 300 | Pasadena, California 91101

About Leonard L. Gumport

Leonard L. Gumport has more than 40 years of experience in business and bankruptcy litigation, including internal investigations and litigation involving allegations of financial fraud and government corruption. In addition to serving as counsel to public and privately held entities in investigations and litigation, he has served as trial counsel in state, federal district, and bankruptcy court cases and has litigated appellate matters in the California Court of Appeal, the Ninth Circuit Court of Appeals, and one matter (unsuccessfully) in the U.S. Supreme Court.

Mr. Gumport has served as a mediator for more than 20 years. His mediations have involved bankruptcy, business, regulatory, and consumer disputes, including class actions and government enforcement proceedings.

In addition, Mr. Gumport has served as a chapter 11 bankruptcy trustee, chapter 7 bankruptcy trustee, SIPC trustee, bankruptcy examiner, and provisional director.

Mr. Gumport is admitted to practice in Alaska, California, the District of Columbia, and New York, and he is a member of the panel of mediators maintained by the ADR Programs of the U.S. District Court for the Central District of California and the U.S. Bankruptcy Court for the Central District of California. Awards to Mr. Gumport for his service as a panel mediator are listed on the Mediation page of this website.

He received his B.A. from Yale University (summa cum laude and Phi Beta Kappa) and his J.D. from Columbia Law School (Harlan Fiske Stone Scholar, 2nd and 3rd years). Following graduation from law school, he clerked for U.S. District Judge Gus J. Solomon (D. Oregon) during 1977-1979. In 1979, following his judicial clerkship, Mr. Gumport joined the law firm then known as Beardsley, Hufstedler & Kemble. During 1979-1995, he practiced at that firm and its successor firms, where he started as an associate and became a partner. During March 1995 to October 2018, he co-founded and practiced at a Los Angeles law firm ultimately known as Gumport | Mastan.

In October 2018, Mr. Gumport’s law partner Peter J. Mastan joined Dinsmore & Shohl, LLP, where he can be reached at [email protected]. Effective on November 1, 2018, Mr. Gumport began his new firm, Gumport Law Firm, PC.

Mr. Gumport authored “The Bankruptcy Examiner,” 20 Cal. Bankr. J. 71 (1992), which has been cited in judicial decisions, including In re Big Rivers Electric Corp., 355 F.3d 415 (6th Cir. 2005). In 2005, Mr. Gumport and his co-counsel from a multi-week trial on behalf of the County of San Bernardino made a presentation on Government Code section 1090 in a program entitled “Public Corruption: Maximizing Remedies” at the annual meeting conference of the County Counsels’ Association of California.

Mr. Gumport has served as Lawyer Representative to the Ninth Circuit Judicial Conference and as Chair of the Federal Courts Committee of the Los Angeles County Bar Association. He has also served as a member of the Board of Editors of the California Bankruptcy Journal.

Mr. Gumport currently serves a member of the Legislation Subcommittee of the Insolvency Law Comittee of the Business Law Section of the California Lawyers Association.

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Professional Memberships and Activities
Published Articles
  • Author, "The Bankruptcy Examiner," 20 Cal. Bankr. J. 71 (1992)
  • See Articles page for a list of additional articles
Selected Reported Cases
  • In re Intermagnetics America, Inc., 926 F.2d 912 (9th Cir. 1991)
  • In re Thrifty Oil Co., 205 B.R. 1009 (Bankr. S.D. Cal. 1997)
  • County of San Bernardino v. Walsh, 158 Cal. App. 4th 533 (2008)
  • "AV" rated by Martindale-Hubbell
  • See Mediation page for additional honors
  • Recognized in Southern California Super Lawyers magazine, Bankruptcy and Creditor/Debtor Rights, 2007-2020, and Alternative Dispute Resolution, 2021
  • Lawyer Representative,Ninth Circuit Judicial Conference, 1998-2000
  • Law Clerk to U.S. District Judge Gus J. Solomon, 1977-1979