FTNT: Financial results

Item 2.02 Results of Operations and Financial Condition. On October 28, 2026, Fortinet, Inc. issued a press release reporting its financial results for the third quarter ended September 30, 2026. A copy of the press release is furnished herewith as Exhibit 99.1 and is incorporated herein by reference. This information shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such a filing. Item 9.01 Financial Statements and Exhibits. (d) Exhibits Exhibit No. Description 99.1 Press release dated Octo ber 2 8 , 2026 104 Cover Page Interactive Data File - the cover page for this Current Report on Form 8-K is formatted in iXBRL SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. Fortinet, Inc. Date: October 28, 2026 By: /s/ JOHN WHITTLE John Whittle Chief Operating Officer