Palo Alto Networks lawsuits in recent years fall into two main buckets: a securities fraud class action filed by shareholders after a sharp 2024 stock drop, and a string of patent fights brought by competitors and licensing firms. The securities case was dismissed with prejudice in August 2025 and is now on appeal. On the patent side, the company lost a $151.5 million jury verdict to Centripetal Networks that was later cut to $113.6 million, won a decade-long $100 million case brought by Finjan, and settled an earlier dispute with Juniper Networks for $175 million.
The 2024 Securities Fraud Class Action
On February 20, 2024, Palo Alto Networks released second-quarter fiscal 2024 results and cut its guidance. Full-year billings guidance dropped from $10.7–$10.8 billion to $10.1–$10.2 billion, and revenue guidance fell from $8.15–$8.2 billion to $7.95–$8 billion. CEO Nikesh Arora blamed “spending fatigue in cybersecurity” and announced a pivot to “platformization,” offering free access to some products so customers would consolidate their security tools onto Palo Alto’s platform. He said the shift would drag on billings and revenue growth for 12 to 18 months. The next day, the stock fell $104.12, roughly 28%, its worst session since the 2012 IPO.1CNBC. Palo Alto Networks Stock on Pace for Worst Day Since IPO
Shareholders filed a class action, In re Palo Alto Networks Inc. Securities Litigation, Case No. 24-cv-01156, in the U.S. District Court for the Northern District of California, before Judge Charles R. Breyer. The complaint named the company and Arora as defendants.2Bloomberg Law. Palo Alto Networks Sheds Investors’ Suit Over 28% Stock Drop The proposed class period ran from November 16, 2023, through February 20, 2024.
Investors alleged the defendants made materially misleading statements by failing to disclose that:3Kessler Topaz Meltzer & Check, LLP. Palo Alto Networks, Inc. Securities Fraud Class Action
- The platformization strategy was not meaningfully growing market share.
- The company would need to ramp up free product giveaways to drive adoption.
- Reported billings growth rates could not be sustained.
- New AI offerings were not accelerating customer consolidation as executives had said.
On August 19, 2025, Judge Breyer dismissed the second amended complaint with prejudice. He ruled that plaintiffs had not pleaded specific facts showing the company’s statements about its sales strategy were misleading when made, and had not adequately alleged that Arora acted with intent or reckless disregard for the truth.2Bloomberg Law. Palo Alto Networks Sheds Investors’ Suit Over 28% Stock Drop Lead plaintiffs filed a notice of appeal to the Ninth Circuit on September 17, 2025, and that appeal remains pending.3Kessler Topaz Meltzer & Check, LLP. Palo Alto Networks, Inc. Securities Fraud Class Action
A parallel shareholder derivative suit, Silva et al v. Arora et al, No. 3:24-cv-02350, was filed in April 2024 in the same court, targeting board members and executives over the same disclosures.4Bloomberg Law. Palo Alto Networks Leadership Sued After Stock’s Biggest Selloff
The Centripetal Networks Patent Battle
Centripetal Networks, a smaller cybersecurity firm, has been Palo Alto’s most persistent patent adversary. The dispute, centered on next-generation firewall technology, has run through a federal jury trial, the Patent Trial and Appeal Board, the Federal Circuit, and European courts.
In January 2024, a jury in the Eastern District of Virginia found that Palo Alto Networks infringed four Centripetal patents and awarded $151.5 million, roughly $37.9 million per patent. The jury did not find the infringement willful.5Wall Street Journal. Palo Alto Networks Must Pay Centripetal $151.5 Million in Patent Dispute
Palo Alto Networks moved for judgment as a matter of law and a new trial. Judge Elizabeth W. Hanes granted the motion in part, finding insufficient evidence of infringement on one of the four patents (the ‘437 patent) and cutting the damages from $151.5 million to $113.6 million. The court upheld the jury’s findings on the other three patents and denied a new trial. The district court case was closed in October 2024.6Law360. Centripetal’s $151.5M Patent Award Slashed to $113.6M
A related Centripetal patent, U.S. Patent No. 9,917,856, had been ruled unpatentable as obvious by the PTAB. On October 22, 2025, the Federal Circuit vacated that ruling and sent the case back, holding that the Board failed to properly weigh Centripetal’s evidence that Palo Alto Networks had copied its technology, which is a recognized indicator that a patent is not obvious.7U.S. Court of Appeals for the Federal Circuit. Centripetal Networks, LLC v. Palo Alto Networks, Inc., No. 2023-2027 That remand is still pending.
In Europe, the Unified Patent Court’s Mannheim Local Division revoked Centripetal’s European patent EP 3 652 914 in Germany and France in December 2025, finding it lacked novelty, and dismissed the infringement claim.8EIP. UPC Mannheim Local Division Invalidates Cyberanalysis Patent Centripetal’s appeal reached the UPC Court of Appeal in February 2026 and was in the written phase as of early 2026.9Unified Patent Court. UPC Case UPC-COA-0000031/2026 The European Patent Office’s Opposition Division also revoked another Centripetal patent, EP 3 821 580, in November 2025.10Unified Patent Court. Final Order, Centripetal v. Palo Alto Networks
The Finjan Case: A Decade-Long Win
Finjan, a cybersecurity patent licensing firm, sued Palo Alto Networks in the Northern District of California in November 2014, originally asserting ten patents and seeking at least $100 million. The case narrowed over the years to three patents covering malicious-code monitoring, secure-gateway caching, and adaptive content scanning.11Law360. Palo Alto Networks Dodges $100M Cybersecurity Patent Case
On March 27, 2025, Judge Richard Seeborg ruled that Palo Alto Networks’ accused products did not meet the necessary claim elements and dismissed the case, giving the company a complete win after more than ten years of litigation.12Morrison & Foerster. Palo Alto Networks Dodges $100M Cybersecurity Patent Case
The $175 Million Juniper Networks Settlement
Palo Alto’s earliest major lawsuit came from Juniper Networks, which filed suit in the District of Delaware in December 2011. The case involved firewall and network security patents that Palo Alto’s founders had invented while working at Juniper. A seven-day trial on the first three asserted patents ended in a mistrial after a hung jury.13Irell & Manella LLP. Juniper Networks Inc. v. Palo Alto Networks Inc.
In May 2014, the parties settled for a package valued at $175 million: $75 million in cash plus $100 million in Palo Alto Networks common stock and warrants. The deal included cross-licensing and an eight-year covenant not to sue.13Irell & Manella LLP. Juniper Networks Inc. v. Palo Alto Networks Inc.
Other Patent Suits
Palo Alto Networks has been named in a number of smaller patent cases brought by competitors and patent-assertion entities. Lionra Technologies Limited, an Irish company, sued in the Eastern District of Texas in August 2022; the case was dismissed with prejudice in July 2024 after mediation failed.14PACER Monitor. Lionra Technologies Limited v. Palo Alto Networks, Inc. Other plaintiffs include Selective Signals, Implicit LLC, and Verifire Network Solutions in federal courts in Delaware and Texas, along with a 2010 suit by competitor Fortinet in the Northern District of California. Most of those cases have closed, and the resolution terms are generally not public.15Stanford NPE Litigation Database. Palo Alto Networks, Inc.