Law Firms Urge F5 Investors to Seek Lead Plaintiff Status in Cyber Breach Case

Investors face a Feb. 17 deadline to pursue a lead role in an early-stage case over F5’s cyber incident disclosures.

Overview

Notices on Jan. 2 from Portnoy Law Firm, the Law Offices of Howard G. Smith, and Rosen Law Firm invite FFIV purchasers during Oct. 28, 2024 to Oct. 27, 2025 to contact counsel.
The firms point to F5’s Oct. 15, 2025 statement that it learned on Aug. 9, 2025 of a nation‑state intrusion that accessed certain company systems, including those tied to BIG‑IP.
Filed complaints allege prior positive statements about F5’s business and outlook were misleading because they did not reveal the significant security incident.
The announcements assert that subsequent disclosures drove F5’s share price lower, contributing to claimed investor losses.
Rosen says a class action is already on file and all notices stress that no class has been certified, with motions for lead plaintiff due by Feb. 17, 2026.