Fortinet, Inc. (FTNT) Securities Class Action Lawsuit Filed [October 16, 2025]

Introduction to Fortinet, Inc. (FTNT) Securities Class Action Lawsuit

A securities fraud class action has been filed against Fortinet, Inc. (NASDAQ: FTNT) on behalf of investors who purchased Fortinet common stock from November 8, 2024 through August 6, 2025, inclusive. Investors allege the company misrepresented the size, timing, and business impact of a purportedly "record" FortiGate firewall upgrade cycle involving roughly 650,000 units—about one quarter of all FortiGate devices. According to the complaint, executives projected hundreds of millions in product revenue and said upgrade momentum would build into the second half of 2025. On August 6, 2025, Fortinet disclosed the company was already 40% to 50% through the cycle by the end of the second quarter, admitted it was hard to predict the total number of devices needing upgrades, and acknowledged the refresh involved older products with limited impact. The next day, Fortinet's stock fell over 22%, allegedly harming investors who bought at prices inflated by these statements.

Fortinet, Inc. (FTNT) Securities Lawsuit Case Details

Case Name: Oklahoma Firefighters Pension and Retirement System v. Fortinet, Inc., et al.
Case No.: 5:25-cv-08037
Jurisdiction: U.S. District Court, Northern District of California
Filed on: September 22, 2025

Fortinet, Inc. (FTNT) Company Profile

Fortinet is a cybersecurity company best known for its FortiGate firewalls—network security devices that monitor, filter, and control traffic under set security rules. Product revenue accounts for roughly 30–35% of total revenue, while service revenue contributes about 65–70%.

Fortinet, Inc. (FTNT) Securities Lawsuit Class Period

November 8, 2024–August 6, 2025, inclusive.

All persons and entities that purchased or acquired Fortinet common stock during this period are included, inclusive.

Allegations in the Fortinet, Inc. (FTNT) Securities Class Action Lawsuit

The complaint names Fortinet, Inc., CEO and Chairman Ken Xie, CTO and Director Michael Xie, former CFO Keith Jensen, and current CFO Christiane Ohlgart. According to investors, the defendants framed a "record" FortiGate upgrade cycle—about 650,000 units—as a powerful, sustained driver for product revenue and near-term momentum.

On November 7, 2024, then-CFO Keith Jensen told investors on the 3Q 2024 earnings call that "the absolute number that we see in 2026 is by far the largest we've seen probably ever." Shortly after, on November 18, 2024 at the company's Analyst Day, CFO Christiane Ohlgart said the "yield is probably around net to [Fortinet] over the next two years, around $400 million to $450 million in product revenue." By February 6, 2025, Jensen stated on the 4Q 2024 call that momentum would build into the second half of 2025 as the 2026 end-of-service dates approached. And on May 7, 2025, Ohlgart reiterated on the 1Q 2025 call that Fortinet continued to expect the firewall upgrade to gain momentum in both purchasing and planning activities in the second half of 2025.

Meanwhile, the complaint alleges a different reality: defendants knew the refresh would not be as lucrative because it involved older devices that represented only a small percentage of Fortinet's business. Investors allege defendants lacked a clear picture of how many FortiGates actually required upgrades and had already pushed through roughly half of the refresh in just a few months by the end of the second quarter of 2025. As a result, the promised momentum and revenue tailwind were allegedly overstated.

The Truth Emerges

On August 6, 2025, during the 2Q 2025 earnings call after markets closed, Fortinet revealed it was already approximately 40% to 50% through the 2026 upgrade cycle by the end of the second quarter. Management also admitted uncertainty around the true number of FortiGates needing upgrades, with CFO Christiane Ohlgart stating it was hard for the company to predict the total number. CEO Ken Xie added that even if the available products were upgraded within one or two years, the business impact would be much smaller given the older devices involved.

According to the complaint, these revelations directly undercut prior messages about a ramping upgrade in the second half of 2025 and a projected $400–$450 million product revenue yield over two years. The disclosure recast the upgrade cycle as smaller, further along than suggested, and less impactful to Fortinet's business than investors had been led to believe.

Market Reaction

On August 7, 2025, Fortinet's stock price fell over 22%, from $96.58 to $75.30, resulting in significant shareholder losses. The drop followed Fortinet’s disclosure that the upgrade cycle was already 40% to 50% completed with limited business impact.

Next Steps

• Submissions for lead plaintiff are due November 21, 2025. 
• The Court will issue its order for lead plaintiff and counsel in the weeks after submissions are due.
• The Court will then consider motion for class certification.
• The Court will later consider a Motion to Dismiss.

To learn if you are eligible for recovery under the FTNT securities class action lawsuit, visit the case submission page here.

Disclaimer: This shareholder alert is for informational purposes only and does not constitute legal advice. Consult a qualified attorney for personalized guidance. No specific outcomes are guaranteed.