F5 Securities Class Actions Gather Plaintiffs Ahead of Feb. 17 Lead Bid Deadline

The suits stem from F5's October disclosures of a nation‑state intrusion into BIG‑IP systems that preceded a revenue outlook cut for fiscal 2026.

Overview

Robbins Geller’s case, Smith v. F5, Inc. (No. 25‑cv‑02619, W.D. Wash.), anchors a group of pending securities lawsuits, with no class certified to date.
Investors who bought F5 shares between October 28, 2024 and October 27, 2025 face a February 17, 2026 deadline to seek lead‑plaintiff status.
F5 said a highly sophisticated actor maintained long‑term access to certain systems and downloaded files from its BIG‑IP development environment, including source code, as disclosed on October 15, 2025.
On October 27, 2025 the company forecast fiscal‑2026 revenue growth of 0%–4% citing breach‑related sales disruption and remediation costs, and shares fell roughly 11% over two sessions after a nearly 14% drop following the earlier disclosure.
Plaintiffs allege delayed or misleading risk disclosures and misstatements about product security, while law firms continue soliciting investors and whistleblower information; the claims remain unproven.