TENB: Financial results

Item 2.02 Results of Operations and Financial Condition. On October 28, 2026, Tenable Holdings, Inc. (the "Company") reported financial results for the quarter ended September 30, 2026. A copy of the press release is furnished as Exhibit 99.1 to this report and incorporated by reference. The information in this Item 2.02 of this Current Report on Form 8-K (including Exhibit 99.1) is furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or subject to the liabilities of that section or Sections 11 and 12(a)(2) of the Securities Act of 1933, as amended. The information shall not be deemed incorporated by reference into any other filing with the Securities and Exchange Commission made by the Company, whether made before or after today’s date, regardless of any general incorporation language in such filing, except as shall be expressly set forth by specific references in such filing. Item 9.01 Financial Statements and Exhibits. (d) Exhibits Exhibit Number Description 99.1 Press release — "Tenable Announces Third Quarter 2026 Financial Results" 101.SCH Inline XBRL Taxonomy Extension Schema Document. 101.LAB Inline XBRL Taxonomy Extension Label Linkbase Document. 101.PRE Inline XBRL Taxonomy Extension Presentation Linkbase Document. 104 The cover page from Tenable's 8-K filed on October 28, 2026, formatted in Inline XBRL. 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. TENABLE HOLDINGS, INC. Date: October 28, 2026 By: /s/ Michelle VonderHaar Michelle VonderHaar Chief Legal Officer and Corporate Secretary