Fortinet stock plunges after earnings miss on AI growth
Fortinet shares fell sharply after its Q3 2026 earnings report, as slowing product revenue growth and unmet AI expectations overshadowed revenue and earnings beats.
Fortinet Inc. (FTNT) reported its third-quarter fiscal 2026 results after Wednesday's closing bell, beating analyst estimates on revenue and earnings. The cybersecurity firm posted quarterly earnings of 91 cents per share, surpassing the Street estimate of 86 cents. Revenue for the quarter was $2.08 billion, beating the consensus estimate of $2.06 billion and representing a 20% increase from the $1.73 billion reported a year ago. Product revenue grew 37% year-over-year to $765 million.
Despite these strong figures, Fortinet's stock fell 5.9% after the earnings announcement. In extended trading, the shares were down 21.87% to $136, shedding about a quarter of their value based on after-hours activity.
Stock plunges on AI growth concerns
Investors reacted negatively to a significant deceleration in product revenue growth, which failed to meet high AI-fueled expectations. The slowdown in this key segment compared to the previous quarter signaled that growth may not be as robust as anticipated, despite the overall revenue beat. The stock had been trading about 3.4% below its 20-day simple moving average of $182.02 prior to the report.
Key technical levels came into focus following the drop. The stock's relative strength index was 47.74, indicating neutral momentum. Analysts identified a key resistance level at $181.50, near the 20-day moving average zone, and a key support level at $166, near the 100-day simple moving average of $163.63.
Cybersecurity sector declines on growth slowdown
The sell-off in Fortinet triggered a broader decline across the cybersecurity sector, as its slowdown raised concerns about growth sustainability industry-wide. Several major peers saw their shares fall in sympathy.
| Company | Ticker | Stock Decline |
|---|---|---|
| Palo Alto Networks | PANW | -1.79% |
| Zscaler | ZS | -1.67% |
| CrowdStrike | CRWD | -0.51% |
| Okta | OKTA | -1.51% |
Financial metrics and market context
Beyond the headline revenue and earnings, Fortinet reported billings growth of 29% year-over-year to $2.34 billion. The company's non-GAAP operating margin was 38%. CEO Ken Xie stated the company was pleased with the results and, for the third time this year, raised its full-year 2026 billings guidance.
The report was published on October 28, 2026, at 7:18 p.m. ET. Broader market indicators showed mixed movements: the S&P 500 was up 0.28% to 7,743.98, while the Dow Jones Industrial Average was up 0.19% to 52,475.10. The VIX volatility index fell 3.48% to 16.91. In commodities, crude oil prices were down 1.44% to $101.30 per barrel, gold was up 0.07% to $4,054.40 per ounce, and Bitcoin was down 1.53% to $80,254.51. The company closed the quarter by raising its annual billings outlook once more.
