Ninth Circuit

In 2025, courts continued to issue significant decisions concerning the application of wiretap and privacy laws to pixels, session replay, and other website technologies. Over the past year, we have featured posts discussing claims regarding website analytics and advertising tools brought under the federal Wiretap Act, the California Invasion of Privacy Act (“CIPA”), the Video Privacy Protection Act (“VPPA”), and other laws.  A selection of posts highlighting important developments in this area is below. Continue Reading Website Wiretapping Roundup: 2025 Decisions and Developments 

On October 27, 2025, the Ninth Circuit affirmed in a memorandum opinion the dismissal of a proposed class action asserting that the owner of a cybersecurity browser extension violated the California Invasion of Privacy Act (“CIPA”) and the Electronic Communications Privacy Act (“ECPA”) by intercepting communications between extension-users and search engines. Karwowski v. Gen Digital, Inc., No. 24-7213, 2025 WL 3002610 (9th Cir. Oct. 27, 2025) (mem.).  The Court held that the Plaintiffs failed to allege that the Defendant was not a party to the communications.Continue Reading Ninth Circuit Affirms Dismissal of Wiretap Claims Based on Party Exception

In a win for businesses using third-party technologies to power their websites, a California federal court applied the Ninth Circuit’s recent decision in Popa v. Microsoft Corporation to dismiss a “pen register” claim brought under the California Invasion of Privacy Act (“CIPA”) for lack of Article III standing.  Khamooshi v. Politico LLC, No. 24-cv-07836-SK, 2025 WL 2822879 (N.D. Cal. Oct. 2, 2025).  “As in Popa,” the Khamooshi court held that the plaintiffs—who alleged the collection of their device type, browser type, and “device fingerprints”—“identifie[d] no embarrassing, invasive, or otherwise private information collected,” as required to establish an Article III injury. Continue Reading Court Applies Popa to Dismiss CIPA Pen Register Claim for Lack of Article III Standing

In a win for implied preemption, the Ninth Circuit recently affirmed dismissal of supplement marketing claims under California’s Unfair Competition Law (UCL).  The case, Bubak v. Golo, LLC, No. 24-492 (9th Cir. Oct. 9, 2025), held that the plaintiff’s UCL claim was impliedly preempted because it depended entirely on alleged violations of the federal Food, Drug, and Cosmetic Act (FDCA), which may be enforced only by the federal government.Continue Reading Ninth Circuit Affirms Dismissal of Supplement Marketing Claims as Impliedly Preempted

In 2018, the Ninth Circuit held in Lusnak v. Bank of America, N.A. that California’s interest-on-escrow law was not preempted by the National Bank Act because the California law did not prevent or significantly interfere with the bank’s exercise of its powers.  883 F.3d 1185 (9th Cir. 2018).  Six years after Lusnak, the Supreme Court held in Cantero v. Bank of America that test for preemption under the National Bank Act requires courts to “make a practical assessment of the nature and degree of the interference caused by a state law,” and courts should do so by engaging in a “nuanced comparative analysis” that compares the interference caused by previous state laws that were challenged as preempted before the Supreme Court to the law at issue.  602 U.S. 205, 219–21 (2024). Continue Reading Post-Cantero, Ninth Circuit Allows Prior National Bank Act Preemption Decision To Remain Standing

A divided Ninth Circuit panel recently affirmed a district court’s denial of class certification based on a lack of predominance.  See Ambrosio v. Progressive Preferred Ins. Co., 2025 WL 2628179 (9th Cir. Sept. 12, 2025).  The plaintiffs sought to represent a class of drivers asserting breach-of-contract and other related claims against an auto insurer.  The drivers alleged the insurer’s use of a “projected sold adjustment” (“PSA”) to calculate the market value of insured drivers’ vehicles after a total loss led the insurer to uniformly underestimate vehicle value, which they contended violated the terms of their insurance policies.  Agreeing with the district court’s reasoning, the Ninth Circuit held that, because the insurer’s use of the PSA did not by itself violate the terms of the policies, each plaintiff would need to adduce individual evidence to prove that the PSA had caused them measurable damages—an essential element of a claim for breach of contract under Arizona law. Continue Reading Ninth Circuit Affirms Denial of Class Certification Finding Lack of Predominance

On August 15, the Ninth Circuit Court of Appeals affirmed the dismissal of a class action complaint in Gibson v. Cendyn Group, No. 24-3576, rejecting plaintiffs’ arguments that Las Vegas hotels violated Section 1 of the Sherman Act through their common use of revenue management software.  The decision follows…

Continue Reading Ninth Circuit Rejects Vegas Hotel Algorithmic Price Fixing Claims

The Ninth Circuit in Maree v. Deutsche Lufthansa A.G., No. 23-55795, 2025 WL 2268254 (9th Cir. Aug. 8, 2025) recently vacated and remanded a district court’s approval of a class action settlement because it found class counsel’s fees likely represented a disproportionate amount of the settlement fund. The settlement at issue sought to resolve two class actions filed against Lufthansa based on an alleged failure to provide timely refunds to customers for cancelling flights during the COVID-19 pandemic.Continue Reading Fee-versal of Fortune

Extending its recent decision in Lytle v. Nutramax Laboratories, Inc., 114 F.4th 1011, 1032 (9th Cir. 2024), the Ninth Circuit recently affirmed class certification in a false advertising case based in part on an unexecuted and “not yet fully developed” damages model.  The panel reasoned that the expert’s explanation of the damages model he proposed to (but had not yet) run established that the model “could reliably measure damages on a classwide basis and adequately for present purposes matched [plaintiff’s] theory of harm.”  The panel also confirmed that in some cases, false advertising plaintiffs can benefit from an inference of classwide materiality and reliance under California law.Continue Reading Ninth Circuit Affirms Class Certification Based on Unexecuted Damages Model

Last month, a California federal court in Dai v. SAS Institute, No. 4:24-cv-02537 (N.D. Cal. 2025), dismissed a proposed antitrust class action complaint against six nationwide hotel operators alleging that the hotels’ common use of revenue management software to set their room prices amounted to a per se illegal “hub-and-spoke” conspiracy to fix hotel prices in violation of Section 1 of the Sherman Act. Continue Reading California Court Dismisses Hotel Algorithmic Price Fixing Claims