UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or Section 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): May 14, 2025

WINVEST ACQUISITION CORP.

(Exact name of registrant as specified in its charter)

125 Cambridgepark Drive, Suite 301

Cambridge, Massachusetts

02140

(Address of principal executive offices)

Registrant’s telephone number, including area code: (617) 658-3094

Not Applicable

(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:

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

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 4.01. Changes in Registrant’s Certifying Accountant.

(a) Resignation of Independent Registered Public Accounting Firm

On November 1, 2024, CBIZ CPAs P.C. (“CBIZ”) acquired the attest business of Marcum LLP (“Marcum”), the independent registered public accounting firm of WinVest Acquisition Corp. (the “Company”). On May 14, 2025, the Company was notified by Marcum that Marcum resigned as the Company’s independent registered public accounting firm as a result of such acquisition, and the Company’s Audit Committee approved the resignation. Marcum continued to serve as the Company’s independent registered public accounting firm through May 14, 2025.

The audit reports of Marcum on the Company’s consolidated financial statements as of and for the fiscal years ended December 31, 2024 and 2023 did not contain an adverse opinion or a disclaimer of opinion, and were not qualified or modified as to uncertainty, audit scope, or accounting principles, except that the reports for the fiscal years ended December 31, 2024 and December 31, 2023 included an explanatory paragraph relating to substantial doubt about the Company’s ability to continue as a going concern.

During the fiscal years ended December 31, 2024 and 2023 and through May 14, 2025, there were (1) no “disagreements” (as defined in Item 304(a)(1)(iv) of Regulation S-K and the related instructions) between the Company and Marcum on any matter of accounting principles or practices, financial statement disclosure or auditing scope or procedures, which disagreements, if not resolved to the satisfaction of Marcum, would have caused Marcum to make reference to the subject matter of the disagreement in their reports on the financial statements for such years, and (2) no “reportable events” (as described in Item 304(a)(1)(v) of Regulation S-K), except for the material weakness in the Company’s internal control over financial reporting relating to (i) the protection of funds permitted for withdrawal from the trust account established for the benefit of the Company’s public stockholders and maintained by the Continental Stock Transfer & Trust Company, (ii) the Company’s non-compliance with the investment management trust agreement entered into with the Continental Stock Transfer & Trust Company and (iii) incorrectly filing income taxes in the state of Delaware, each as disclosed in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2024.

The Company has provided Marcum with a copy of the foregoing disclosures it is making in this Current Report on Form 8-K prior to its filing and requested, in accordance with applicable practices, that Marcum furnish a letter addressed to the Securities and Exchange Commission stating whether or not it agrees with the statements made herein. Attached as Exhibit 16.1 is a copy of Marcum’s letter, dated May 19, 2025, stating that it agrees with such statements.

(b) Engagement of New Independent Registered Public Accounting Firm

On May 14, 2025, CBIZ was engaged as the Company’s new independent registered public accounting firm for the fiscal year ending December 31, 2025, and such engagement was approved by the Company’s Audit Committee.

During the fiscal years ended December 31, 2024 and 2023 and through May 14, 2025, neither the Company nor anyone on its behalf consulted with CBIZ regarding (1) the application of accounting principles to a specified transaction, completed or proposed, or the type of audit opinion that might be rendered on the Company’s financial statements, and neither a written report nor oral advice was provided to the Company that CBIZ concluded was an important factor considered by the Company in reaching a decision as to any accounting, auditing or financial reporting issue, or (2) any matter that was either the subject of a disagreement (as defined in Item 304(a)(1)(iv) of Regulation S-K and the related instructions) or a reportable event (as described in Item 304(a)(1)(v) of Regulation S-K).

Item 9.01. Financial Statements and Exhibits

(d) Exhibits

SIGNATURE

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.

Dated: May 20, 2025