Form 8-K

8-K — Tenable Holdings, Inc.

Accession: 0001660280-26-000026

Filed: 2026-05-13

Period: 2026-05-13

CIK: 0001660280

SIC: 7372 (SERVICES-PREPACKAGED SOFTWARE)

Item: Submission of Matters to a Vote of Security Holders

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8-K — tenb-20260513.htm (Primary)

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

__________________

FORM 8-K

__________________

CURRENT REPORT

Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934

Date of report (Date of earliest event reported): May 13, 2026

__________________

TENABLE HOLDINGS, INC.

(Exact name of registrant as specified in its charter)

__________________

Delaware 001-38600 47-5580846

(State or other jurisdiction of incorporation or organization) (Commission File Number) (I.R.S. Employer Identification Number)

6100 Merriweather Drive, Columbia, Maryland, 21044

(Address of principal executive offices, including zip code)

(410) 872-0555

(Registrant’s telephone number, including area code)

__________________

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class Trading Symbol(s) Name of each exchange on which registered

Common Stock, par value $0.01 per share TENB The Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 5.07 Submission of Matters to a Vote of Security Holders.

On May 13, 2026, Tenable Holdings, Inc. (the “Company”) held its 2026 annual meeting of stockholders (the “Annual Meeting”). The stockholders considered four proposals, each of which is described in more detail in the Company’s definitive proxy statement filed with the Securities and Exchange Commission on April 2, 2026 (the “Proxy Statement”). Of the 114,530,327 shares outstanding as of the record date, 106,390,505 shares, or approximately 92.89%, were present or represented by proxy at the Annual Meeting. Set forth below are the results of the matters submitted for a vote of stockholders at the Annual Meeting.

Proposal No. 1: Election of three nominees to serve as directors until the 2029 annual meeting of stockholders and until their respective successors are elected and qualified. The votes were cast as follows:

Votes For Votes Withheld

John C. Huffard, Jr.

50,765,937 42,627,545

A. Brooke Seawell 69,784,955 23,608,527

Raymond Vicks, Jr. 70,871,351 22,522,131

Broker Non-Votes: 12,997,023

All nominees were elected.

Proposal No. 2: Ratification of the appointment of Ernst & Young LLP as independent registered public accounting firm for the fiscal year ending December 31, 2026. The votes were cast as follows:

Votes For

Votes Against

Votes Abstained

Broker Non-Votes

105,641,971 589,380 159,154 —

Proposal No. 3: The advisory vote on the compensation of the Company’s named executive officers as disclosed in the Proxy Statement. The votes were cast as follows:

Votes For

Votes Against

Votes Abstained

Broker Non-Votes

83,235,799 9,941,420 216,263 12,997,023

Proposal No. 4: The advisory vote on the frequency of solicitation of future advisory stockholder approval of named executive officer compensation. The votes were cast as follows:

1 Year

2 Years

3 Years

Votes Abstained

Broker Non-Votes

92,531,025 15,905 789,886 56,666 12,997,023

Consistent with the stockholder voting results above and the recommendation of the Board as disclosed in the Proxy Statement for the Annual Meeting, the Board of the Company has determined to solicit a non-binding advisory vote on the compensation of the Company’s named executive officers every year until the next required stockholder vote on the frequency of such non-binding advisory vote, or until the Board of the Company determines that a different frequency of such non-binding advisory vote is in the best interest of the Company’s stockholders.

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: May 13, 2026 By: /s/ Michelle VonderHaar

Michelle VonderHaar

Chief Legal Officer and Corporate Secretary

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