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F5 Securities Suits Intensify as Lead‑Plaintiff Deadline Nears

Plaintiffs challenge F5's disclosure of a nation‑state breach that weighed on its 2026 revenue outlook.

Overview

  • Investor firms including Hagens Berman, Rosen Law, Kahn Swick & Foti, and the Law Offices of Howard G. Smith are urging FFIV shareholders to consider seeking lead‑plaintiff roles by February 17, 2026.
  • The federal case is pending in the U.S. District Court for the Western District of Washington, with filings referencing Smith v. F5, Inc., et al., No. 25‑cv‑02619, and no class has been certified.
  • Complaints cite F5’s October 15, 2025 disclosure of long‑term access by a sophisticated actor to engineering platforms and the exfiltration of BIG‑IP source code, discovered internally on August 9, 2025.
  • F5 on October 27, 2025 guided fiscal 2026 revenue growth to 0%–4% due in part to breach‑related sales impacts, which coincided with sharp share declines reported around both October disclosures.
  • Firms say they are probing whether management delayed or mischaracterized the incident and its impact, while some are also examining potential fiduciary‑duty issues and inviting whistleblower tips; these claims remain unproven.