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Nossaman LLP

Carl L. Blumenstein


T 415.438.7219
F 415.398.2438
50 California Street, 34th Floor
San Francisco, CA 94111

Carl Blumenstein specializes in complex business litigation, primarily insurance coverage, commercial and employment law disputes. For more than 20 years, he has provided counsel and representation to clients in trial and appellate courts and in myriad disputes.

On behalf of policyholders, he has recovered millions of dollars from insurance companies for environmental, employment, and intellectual property matters. Recently, he represented one of the world's leading manufacturers of TFT-LCD panels in a high-profile criminal and civil antitrust proceeding which attracted national media attention. He has also represented private and public entities and individual employees in employment disputes involving wrongful termination, discrimination and harassment, disability, drug testing, trade secret misappropriation, and violations of constitutional law. Over the past decade, Mr. Blumenstein, a user-friendly neutral, has mediated more than 50 civil disputes.

Mr. Blumenstein clerked for the Honorable Charles A. Legge, District Judge of the United States District Court in San Francisco, and also for the Honorable Daral G. Conklin, United States Magistrate for the District of Hawaii.

Representative Work

Goleta Water District v. Slippery Rock Ranch, LLC.  Successfully tried high-profile water rights dispute on behalf of public water district, to defeat an attempted private appropriation of water resources.

In re TFT-LCD Antitrust Litigation. Represented global manufacturer of TFT-LCD panels in complex multi-district antitrust litigation and related opt-out and state enforcement proceedings. Defended client in five-week trial against national retailer. The case raised cutting-edge issues that resulted in pivotal decisions by circuit courts and U.S Supreme Court.

Aerojet-General Corp. v. Fidelity & Casualty Ins. Co. Represented policyholder in action seeking reimbursement of defense and indemnity expense in connection with allegations of chemical releases arising from TCE (and other VOCs), in addition to NDMA and perchlorate exposure at, and near, Azusa site.

Aerojet-General Corp. v. Transport Indemnity Co. (17 Cal. 4th 38 (1997)) Represented policyholder seeking reimbursement of defense and indemnity expense in connection with historical chemical releases at Sacramento site. Obtained landmark appellate decision, holding that investigative expenses are recoverable as defense expenses.

Retail Digital Network, LLC v. Prieto (9th Cir. 2017) On behalf of California craft breweries, prepared successful amici curiae brief in en banc rehearing, resulting in decision that rejected First Amendment challenge to tied house statutes.

Young v. Cep America-California. Representing group of emergency room physicians in alleged statewide class action for wage and hour violations.

LSI Corporation.  Successfully defended high-tech client in an alleged lease agreement breach. After prevailing on summary adjudication motion, case proceeded to trial, and client obtained affirmative recovery.

American States Water Co. v. Aerojet-General Corp. Defended aerospace manufacturer against utility’s claims arising from alleged chemical contamination of groundwater.

Children's Hospital and Research Center, Oakland v. WCAB, 2010 Cal.App. Unpub. LEXIS 8027. Successfully invoked statutory and constitutional privacy protections to obtain Court of Appeal decision to maintain confidentiality of medical files of HIV-infected children.

Photon Dynamics, Inc. v. Nat'l Union Fire Ins. Co. Filed lawsuit against D&O and EPL insurers and successfully recovered defense expenses after high-tech client obtained jury verdict on securities and misrepresentation claims in lawsuit by former officer.

City of Richmond v. Levin Enterprises. Pursued insurers who provided coverage dating back over 40 years and successfully obtained nearly complete recovery of settlement and defense expenses incurred by client—all without filing litigation.

Trend Micro. Obtained insurance reimbursement for litigation expenses, without filing lawsuit, in high-stakes patent infringement litigation for a software manufacturer.

Title insurance matter. Successfully asserted owners' rights and obtained a settlement from the title insurer, without filing suit, when owners of a historically significant live-work space learned that the title policy had failed to disclose a 100-year old deed that threatened rights to access the property.

Insurance recovery matter. Successfully obtained insurance coverage for a high-tech client under a technical errors and omissions policy for product-related claims asserted by an international customer.

Awards & Honors

AV Preeminent® Peer Review Rated by Martindale-Hubbell.

Selected to the Northern California Super Lawyers list for 2004, 2011-2018.

Carl L. Blumenstein
Carl L. Blumenstein



J.D., University of California, Berkeley School of Law, 1986

A.B., Princeton University, 1982, cum laude



U.S. Court of Appeals, Ninth Circuit

U.S. District Court, Central District of California

U.S. District Court, Eastern District of California

U.S. District Court, Northern District of California

U.S. District Court, Southern District of California

Awards & Honors

AV Preeminent® Peer Review Rated by Martindale-Hubbell.

Selected to the Northern California Super Lawyers list for 2004, 2011-2018.

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