Form 8-K Vertex, Inc. For: Jun 10

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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): June 10, 2026

VERTEX, INC.

(Exact name of registrant as specified in its charter)

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2301 Renaissance Blvd.

King of Prussia, Pennsylvania 19406

(Address of principal executive offices) (Zip Code)

(800) 355-3500

(Registrant’s telephone number, include area code)

N/A

(Former Name or Former Address, if Changed Since Last Report)

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:

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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. ☐

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

On June 10, 2026, Vertex, Inc. held its Annual Meeting of Stockholders.

The following nominees were elected as directors, each to hold office until the 2029 Annual Meeting of Stockholders, or the earlier to occur of his or her death, disqualification, resignation, or removal or the appointment of his or her successor, by the vote set forth below:

The appointment of Crowe LLP as our independent auditor for the fiscal year ending December 31, 2026 was ratified by the vote set forth below:

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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.

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