FFIV ALERT: Kirby McInerney LLP Announces the Filing of a Securities Class Action on Behalf of F5, Inc. Investors

NEW YORK–(BUSINESS WIRE)–The law firm of Kirby McInerney LLP announces that a class action lawsuit has been filed on behalf of investors who acquired F5, Inc. (“F5” or the “Company”) (NASDAQ:FFIV) securities during the period of October 28, 2024 through October 27, 2025, inclusive (“the Class Period”).

If you suffered a loss on your F5 investments, you have until February 17, 2026 to request lead plaintiff appointment. For more information:

[CONTACT THE FIRM IF YOU SUFFERED A LOSS]

What Is This Lawsuit About? The lawsuit alleges that F5 provided overwhelmingly positive statements to investors about its cybersecurity capabilities and effectiveness, disseminating materially false and misleading statements and/or concealing material adverse facts concerning the true state of F5’s security capabilities; notably, that it was not truly equipped to safely secure data for its clients as F5 itself was, for all relevant times, experiencing a significant security breach of some of its key offerings and, further, that the revelation of this breach would significantly impact F5’s potential to capitalize on the security market.

On October 15, 2025, F5 revealed that it had learned in early August that a “highly sophisticated nation-state threat actor had gained unauthorized access to certain F5 systems.” The Company added, “during the course of its investigation, F5 determined that the threat actor maintained long-term, persistent access to certain F5 systems, including the BIG-IP product development environment and engineering knowledge management platform,” and that “through this access, certain files were exfiltrated, some of which contained certain portions of the Company’s BIG-IP source code and information about undisclosed vulnerabilities that it was working on in BIG-IP.” On this news, the price of F5 shares declined by $35.40 per share, or approximately 10.70%, from $330.75 per share on October 15, 2025 to close at $295.35 on October 16, 2025.

[LEARN MORE ABOUT THE LAWSUIT]

The Lead Plaintiff Appointment Process. The federal securities laws permit any investor who acquired eligible securities during the class period to seek appointment as lead plaintiff in a class action lawsuit. Courts typically appoint the investor(s) with the largest financial loss in the case and the ability to represent the class rather than investors with simply the largest investment portfolio. Courts regularly appoint individual investors, whether acting alone or as a group, as lead plaintiffs. The rights of any investor who bought shares during the class period are generally already protected. However, lead plaintiffs have the power to influence case strategy and have a say in settlement decisions, as well as decisions concerning allocation of settlement funds among class members.

[LEARN MORE ABOUT THE LEAD PLAINTIFF PROCESS]

What Should I Do? If you purchased or otherwise acquired F5 securities, have information, or would like to learn more about this investigation, please contact Lauren Molinaro of Kirby McInerney LLP by email at investigations@kmllp.com, or fill out the contact form below, to discuss your rights or interests with respect to these matters at no cost.

Kirby McInerney LLP is a New York-based plaintiffs’ law firm concentrating in securities, antitrust, whistleblower, and consumer litigation. The firm’s efforts on behalf of shareholders in securities litigation have resulted in recoveries totaling billions of dollars. Additional information about the firm can be found at Kirby McInerney LLP’s website.

This press release may be considered Attorney Advertising in some jurisdictions under the applicable law and ethical rules.

Contacts

Kirby McInerney LLP

Lauren Molinaro, Esq.

212-699-1171

https://www.kmllp.com
https://securitiesleadplaintiff.com/
investigations@kmllp.com