Investor Lawsuits Advance Over F5’s 2025 Breach With Lead Plaintiff Deadline Set

Overview

• Robbins Geller, Rosen Law, Portnoy, the Law Offices of Howard G. Smith, and Kahn Swick & Foti are soliciting F5 investors for a class action covering October 28, 2024 through October 27, 2025, with lead‑plaintiff motions due February 17, 2026.
• The case is filed in the Western District of Washington as Smith v. F5, Inc., No. 25‑cv‑02619, and names the company and certain executives for alleged violations of the Securities Exchange Act of 1934.
• Complaints point to F5’s October 15, 2025 notice that a highly sophisticated nation‑state actor had maintained persistent access since August 2025 and downloaded files from systems including the BIG‑IP development environment.
• Filings state the stock fell nearly 14% after the October 15 disclosure and nearly 11% after October 27 results that included below‑market FY2026 guidance tied to breach‑related sales disruptions and higher remediation costs.
• Plaintiffs emphasize that BIG‑IP is F5’s highest‑revenue product and law firms are inviting investors to seek leadership roles or case evaluations, with all claims unproven pending court proceedings.