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 18, 2026

LIONHEART HOLDINGS

(Exact name of registrant as specified in its charter)

200 W Cypress Creek Road, Suite 500

Fort Lauderdale, Florida 33309

(Address of principal executive offices, including zip code)

Registrant’s telephone number, including area code: (305) 573-3900

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 5.03. Amendments to Articles of Incorporation or Bylaws.

The information included in Item 5.07 is incorporated by reference in this item to the extent required.

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

On June 18, 2026, Lionheart Holdings (the “Company”) held an extraordinary general meeting of shareholders (the “Extraordinary General Meeting”). At the Extraordinary General Meeting, the Company’s shareholders approved a proposal to amend the Company’s Amended and Restated Articles of Association to extend the date by which the Company must consummate a merger, amalgamation, share exchange, asset acquisition, stock purchase, reorganization or similar business combination involving the Company, with one or more businesses or entities from June 20, 2026 to March 20, 2027 (the “Extension Amendment”).

The following is a tabulation of the votes with respect to the Extension Amendment, which was approved by the Company’s shareholders:

In connection with the Extraordinary General Meeting, shareholders holding an aggregate of 4,503,836 Class A ordinary shares of the Company (“Public Shares”) exercised their right to redeem such Public Shares for approximately $10.88 per share of the funds held in the Company’s trust account, leaving approximately $201,221,817 in cash in the trust account after satisfaction of such redemptions.

The Company intends to promptly file the Extension Amendment with the Cayman Islands Registrar of Companies.

Item 8.01. Other Events.

On June 18, 2026, pursuant to the terms of the Company’s Amended and Restated Memorandum and Articles of Association, Lionheart Sponsor LLC (the “Sponsor”), the holder of an aggregate of 7,666,667 Class B ordinary shares of the Company (“Class B Ordinary Shares”), elected to convert 3,000,000 outstanding Class B Ordinary Shares held by it on a one-for-one basis into Class A ordinary shares of the Company, with immediate effect. Following such conversion and giving effect to the redemption of Public Shares in connection with the Extension Amendment, as of June 18, 2026, the Company had an aggregate of 21,496,164 Class A ordinary shares issued and outstanding or underlying outstanding Units, and 4,666,667 Class B Ordinary Shares issued and outstanding.

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.

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