Tenable Holdings Inc

This Current Report on Form 8-K contains forward-looking information related to Tenable, Vulcan Cyber and the Acquisition that involves substantial risks, uncertainties and assumptions that could cause actual results to differ materially from those expressed or implied by such statements. You can generally identify forward-looking statements by the use of forward-looking terminology such as the words: “anticipate,” “believe,” “continue,” “could,” “estimate,” “expect,” “explore,” “evaluate,” “intend,” “may,” “might,” “plan,” “potential,” “predict,” “project,” “seek,” “should,” or “will,” or the negative thereof or other variations thereon or comparable terminology. The forward-looking statements in this Current Report on Form 8-K are based on each of the companies’ current plans, objectives, estimates, expectations and intentions and inherently involve significant risks and uncertainties, many of which are beyond Vulcan Cyber’s or Tenable’s control. Forward-looking statements in this communication include, among other things, statements about the anticipated timing of the closing of the Acquisition. Risks and uncertainties include, among other things, our ability to successfully integrate Vulcan Cyber’s operations; our ability to implement our plans, forecasts and other expectations with respect to Vulcan Cyber’s business; our ability to realize the anticipated benefits of the Acquisition, including the possibility that the expected benefits from the Acquisition will not be realized or will not be realized within the expected time period; our ability to consummate the transaction pursuant to the terms and in accordance with the timing described in this Current Report on Form 8-K; disruption from the Acquisition making it more difficult to maintain business and operational relationships; the inability to retain key employees; the negative effects of the consummation of the Acquisition on the market price of our common stock or on our operating results; unknown liabilities; attracting new customers and maintaining and expanding our existing customer base, our ability to scale and update our platform to respond to customers’ needs and rapid technological change, increased competition on our market and our ability to compete effectively, and expansion of our operations and increased adoption of our platform internationally.

Additional risks and uncertainties that could affect the potential benefits of the Acquisition or our financial results are included in the section titled “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in our Annual Report on Form 10-K for the year ended December 31, 2023 and other filings that we make from time to time with the Securities and Exchange Commission which are available on the SEC’s website atwww.sec.gov. In addition, any forward-looking statements contained in this communication are based on assumptions that we believe to be reasonable as of this date. Except as required by law, we assume no obligation to update these forward-looking statements, or to update the reasons if actual results differ materially from those anticipated in the forward-looking statements.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

(*) Pursuant to Item 601(a)(5) of Regulation S-K, certain schedules and similar attachments have been omitted. The registrant hereby agrees to furnish a copy of any omitted schedule or similar attachment to the SEC upon request; provided, however, that Tenable may request confidential treatment pursuant to Rule 24b-2 of the Exchange Act for any schedule or exhibit so furnished.

Pursuant to Item 601(b)(z)(ii) of Regulation S-K promulgated by the SEC, certain portions of this exhibit have been redacted because the registrant customarily and actually treats such omitted information as private or confidential and because such omitted information is not material.