RADNOR, Pa., Nov. 7, 2025 /PRNewswire/ -- The law firm of Kessler Topaz Meltzer & Check, LLP ( ) is currently investigating potential violations of the federal securities laws on behalf of investors of F5, Inc. (NASDAQ: class="ticket-symbol" data-toggle="modal" href="#financial-modal">FFIV ) ("F5").

On October 15, 2025, F5 disclosed that the company learned on August 9, 2025 "that a highly sophisticated nation-state threat actor had gained unauthorized access to certain [F5] systems." F5 further revealed that "[d]uring 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 "[t]hrough 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's stock fell over 10%, from a close of $330.75 on October 15, 2025, to close at $295.35 on October 16, 2025.

If you are an F5 investor and would like to learn more about our investigation, please to fill out our online form or contact Kessler Topaz Meltzer & Check, LLP: Jonathan Naji, Esq. (484) 270-1453 or E-mail at [email protected]. You can also click on the following link or paste it in your browser:

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prosecutes class actions in state and federal courts throughout the country involving securities fraud, breaches of fiduciary duties and other violations of state and federal law. Kessler Topaz Meltzer & Check, LLP is a driving force behind corporate governance reform, and has recovered billions of dollars on behalf of institutional and individual investors from the United States and around the world. The firm represents investors, consumers and whistleblowers (private citizens who report fraudulent practices against the government and share in the recovery of government dollars). For more information about Kessler Topaz Meltzer & Check, LLP, please visit .

CONTACT:

Kessler Topaz Meltzer & Check, LLP
Jonathan Naji, Esq.
280 King of Prussia Road
Radnor, PA 19087
(484) 270-1453
[email protected]

May be considered attorney advertising in certain jurisdictions. Past results do not guarantee future outcomes.

SOURCE Kessler Topaz Meltzer & Check, LLP

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