The facts

  1. The unaudited quarter ended 30 September. GAAP diluted earnings were US$0.86 per share; adjusted, non-GAAP diluted earnings were US$0.91. Those are distinct accounting measures. [1]

  2. Product revenue was US$765 million and service revenue US$1.3134 billion. Billings were US$2.34 billion, a separate metric from recognized revenue. [1]

  3. Full-year service revenue is forecast at US$5.15–5.17 billion. SiliconANGLE compared that with the US$5.18–5.22 billion range given three months earlier. [1][2]

  4. Fortinet’s new total 2026 revenue guidance is US$8.125–8.215 billion. It projects fourth-quarter revenue of US$2.155–2.245 billion and adjusted diluted EPS of US$0.93–0.95. [1]

  5. Yahoo Finance’s Nasdaq common-stock quote for FTNT, in US dollars, showed a 29 October regular-session close of US$139.10 at 16:00:01 EDT (20:00:01 UTC). The 28 October regular-session close was US$174.08: a decline of US$34.98, or 20.09% calculated from those two closes. [3]

  6. Reuters reported that ServiceNow and Fortinet each fell more than 20% in the regular session. Yahoo’s original report separately described the sharp falls after the companies’ results. [4][5]

Corrections & updates

Update: Added the verified 29 October regular-session closing move for FTNT: US$139.10 against US$174.08 on 28 October (20.09% lower). Distinguishes share class, currency, quote time and baseline from earlier premarket or after-hours reports; retained the accounting and guidance distinctions.

Sources

References support the numbered facts above. Source checks: 29 Oct 2026, 22:07 UTC.

  1. Third-quarter results and guidance

    Fortinet · Primary source · 28 Oct 2026

    Released at 16:05 EDT. Forward guidance is not a completed financial result.

  2. Results and comparison with the previous service forecast

    SiliconANGLE · Reporting · 28 Oct 2026

    Independent report by Duncan Riley, updated 18:40 EDT. Its reported percentage stock move is not reproduced because an exact price/baseline snapshot was not verified.

  3. FTNT historical prices and closing quote

    Yahoo Finance market data · Primary source · 29 Oct 2026

    Actual 28–29 October historical rows and current regular-session closing quote read. Nasdaq common shares, US dollars; displayed closing quote time 16:00:01 EDT (20:00:01 UTC) on 29 October. After-hours prices are separate.

  4. Wall Street closing report for 29 October

    Reuters via Yahoo Finance · Reporting · 29 Oct 2026

    Actual updated agency report read. Reuters is independently owned from the issuers and Yahoo’s original newsroom. Its company percentages are rounded; precise values here are calculated from the checked closing data.

  5. Fortinet and ServiceNow shares fall after results

    Yahoo Finance · Reporting · 29 Oct 2026

    Original Ines Ferré report updated at 20:27 UTC read. Same host as the data and Reuters syndication; these are not three independent websites.

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