F5, Inc. Cybersecurity Lawsuit
Analysis based on 10 articles · First reported Dec 21, 2025 · Last updated Dec 29, 2025
The securities class action lawsuit against F5, Inc. and the underlying cybersecurity incident have led to a significant drop in F5, Inc.'s stock price and a reduction in its projected revenue growth. This event highlights the increasing importance of cybersecurity disclosures and their impact on investor confidence and market valuation for technology companies.
F5, Inc. is facing a securities class action lawsuit, Smith v. F5, Inc., et al., filed by Hagens Berman on behalf of investors who purchased F5, Inc. securities between October 28, 2024, and October 27, 2025. The lawsuit stems from F5, Inc.'s October 15, 2025, disclosure of a major cybersecurity incident that occurred on August 9, 2025. A sophisticated nation-state actor gained unauthorized, long-term access to certain F5, Inc. systems, including its highest revenue product, F5 BIG-IP. Despite initial assurances that the incident had no material impact, F5, Inc.'s subsequent Q4 and FY 2025 financial results on October 27, 2025, revealed a significant deceleration in 2026 revenue growth projections, which management attributed to the security incident. Hagens Berman is investigating whether F5, Inc. timely reported the breach to investors, consistent with the United States — United States Securities and Exchange Commission's 4-business-day rule, and the adequacy of its cybersecurity response plan.
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