Henry Weissmann

Henry Weissmann

Henry Weissmann is a partner in the Los Angeles office of Munger, Tolles & Olson.

Mr. Weissmann represents organizations operating in regulated industries in administrative proceedings and related transactions, as well as high-stakes class actions and challenges to government regulations.

Mr. Weissmann is acknowledged as California’s foremost energy regulatory lawyer. In 2023, Chambers USA increased Mr. Weissmann’s ranking from Band 1 to “Star Individual,” a ranking given to lawyers with exceptional recommendations in the field. He has consistently been ranked by Chambers for 19 years.

In 2022, he was named a Thomson Reuters Stand-Out Lawyer and recognized for his depth of regulatory knowledge, which was characterized as “unsurpassed.” He also is consistently listed in The Best Lawyers in America.

Mr. Weissmann is actively involved in the community. He is one of the founding members of the Los Angeles Lawyers Division of the Federalist Society and served as president of the local chapter from 1992 through 2004. In addition, Mr. Weissmann is a member of The American Law Institute and serves on the State Litigation Advisory Committee of the U.S. Chamber of Commerce.

He formerly served as president of the Conference of California Public Utility Counsel, a group of private and public sector lawyers who practice before the California Public Utilities Commission.

Mr. Weissmann is the co-chair of the board of the Los Angeles Metropolitan Debate League, a non-profit organization devoted to organizing debate programs at public high schools.


Mr. Weissmann has participated in over 25 state and federal administrative proceedings, including representation of:

  • Pacific Gas and Electric Company in proceedings at the California Public Utilities Commission:
    • to review its Chapter 11 Plan of Reorganization.
    • to approve a $7.5 billion securitization transaction.
    • to approve a transaction in which its non-nuclear generation assets would be moved to a subsidiary to facilitate a sale of equity.
  • Southern California Edison Company and Pacific Gas and Electric Company in legislative and regulatory matters pertaining to wildfires.
  • Southern California Edison Company in:
    • proceedings before the California Public Utilities Commission in connection with the permanent shutdown of the San Onofre Nuclear Generating Station Units 2 and 3.
    • connection with the energy crisis in 2000-2001.
  • Verizon in:
    • proceedings before the California Public Utilities Commission to approve acquisitions and dispositions of California landline and wireless assets.
    • proceedings before the Federal Communications Commission and Ninth Circuit regarding the acceleration of the deployment of 5G facilities.
  • Young Brothers in an emergency rate increase application to the Hawaii Public Utilities Commission.

​​​​​​​In addition, Mr. Weissmann has extensive experience in class actions. He has defended clients in over 25 class actions in jurisdictions nationwide, including:

  • Plains All American Pipeline in class actions arising from an accidental release of oil in Santa Barbara County.
  • Verizon entities in various class actions alleging inadequate disclosure of various billing practices.
  • Verizon California in a class action challenging the inclusion on bills of charges from third-party service providers that were allegedly unauthorized.
  • Actions alleging that early termination fees in wireless contracts are unlawful penalties.