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, rega…

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, rega…

of this Current Report on 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, regardles…

Other Events. On January 15, 2026, the Company's Board of Directors approved an increase to the Company's existing share repurchase program of up to an additional $150 million, which is also announced in the press release furnished as Exhibit 99.1 to this report. Repurchases under the share repurchase program may be made in the open market, in privately negotiated transactions or in such other manner as determined by the Company, including through repurchase plans complying with the rules and…

of this Current Report on 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, regardles…

Chief Financial Officer — Matthew Brown: The Company appointed Matthew Brown as Chief Financial Officer, bringing in a new external hire with significant experience.

of this Current Report on 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, regardles…

Other Events. On July 28, 2025, the Company's Board of Directors approved an increase to the Company's existing share repurchase program of up to an additional $250 million, which is also announced in the press release furnished as Exhibit 99.1 to this report. Repurchases under the share repurchase program may be made in the open market, in privately negotiated transactions, or in such other manner as determined by the Company, including through repurchase plans complying with the rules and r…

Director — Stephen A. Vintz and Mark Thurmond: The Board of Directors appointed two new directors to the board.

of this Current Report on 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, regardles…

Co-Chief Executive Officers — Stephen A. Vintz and Mark Thurmond: Mr. Vintz and Mr. Thurmond were permanently appointed as co-Chief Executive Officers.

principal accounting officer — J. Barron Anschutz: Mr. Anschutz was promoted to principal accounting officer within the company.

Other Events. On February 7, 2025 , Ermetic Ltd., a company organized under the laws of the State of Israel (“Purchaser”) and an indirect, wholly owned subsidiary of Tenable, completed its previously announced acquisition (the “Acquisition”) of Vulcan Cyber Ltd., a company organized under the laws of the State of Israel (“Vulcan Cyber”). The Acquisition was effectuated pursuant to a Share Purchase Agreement, dated as of January 29, 2025 (the “SPA”) by and among Purchaser, Vulcan Cyber, each o…

of this Current Report on 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 Tenable, whether made before or after today’s date, regardless of…

of this Current Report on 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, regardles…

of this Current Report on 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 (the “Exchange Act”), 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 Tenable, whether made before or after today’…

Entry into a Material Definitive Agreement. On January 29, 2025, Ermetic Ltd. a company organized under the laws of the State of Israel (“Purchaser”) and an indirect, wholly owned subsidiary of Tenable Holdings, Inc., a Delaware corporation (“Tenable”), entered into a share purchase agreement (the “Purchase Agreement”) with Vulcan Cyber Ltd., a company organized under the laws of the State of Israel (“Vulcan Cyber”), each of the shareholders of Vulcan Cyber identified in the Purchase Agreemen…

Chief Executive Officer — Mr. Yoran: The CEO passed away, leading to interim Co-CEO appointments and a search for a new CEO.

of this Current Report on 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, regardles…

Chief Executive Officer — Amit Yoran: Mr. Yoran is on a temporary medical leave of absence due to cancer treatment.

of this Current Report on 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, regardles…

Other Events. On October 25, 2024, the Company's Board of Directors approved an increase to the Company's existing share repurchase program of up to an additional $200 million, which is also announced in the press release furnished as Exhibit 99.1 to this report. Repurchases under the share repurchase program may be made in the open market, in privately negotiated transactions, or in such other manner as determined by the Company, including through repurchase plans complying with the rules an…

of this Current Report on 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, regardles…

The filing describes a new non-employee director compensation policy.

of this Current Report on 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, regardles…