SEC Form 6-K filed by Fusion Fuel Green PLC

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16
UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of: May, 2026.

Commission File Number: 001-39789

Fusion Fuel Green PLC

(Translation of registrant’s name into English)

9 Pembroke Street Upper

Dublin D02 KR83

Ireland

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F ☒ Form 40-F ☐

On May 15, 2026, Fusion Fuel Green PLC, an Irish public limited company (the “Company” or “Fusion Fuel”), mailed a Circular to Shareholders and Notice of Extraordinary General Meeting, dated May 15, 2026 (the “Circular”), and Form of Proxy (the “Form of Proxy”) to shareholders of the Company registered in the register of members of the Company as at 6:00 p.m. on May 8, 2026 relating to an Extraordinary General Meeting (the “EGM”) of its shareholders on June 8, 2026 at 1:00 p.m. Irish Time (8:00 a.m. Eastern Time), to be held at the offices of Arthur Cox LLP, Ten Earlsfort Terrace, Dublin 2, D02 T380, Ireland, to consider three proposals. Copies of the Circular and the Form of Proxy are furnished as Exhibit 99.1 and Exhibit 99.2 to this Report on Form 6-K.

On May 18, 2026, Fusion Fuel Green PLC, an Irish public limited company (the “Company” or “Fusion Fuel”), issued a press release announcing that it will convene the EGM, the unanimous recommendation of the Board of Directors of the Company to vote “for” each of the resolutions described in the Circular and included on the Form of Proxy. The press release also indicated that the Company expects to release an investor update video and presentation on May 27, 2026 on the Company’s website. A copy of the press release is furnished as Exhibit 99.3 to this Report on Form 6-K.

Forward-Looking Statements

The Circular attached as Exhibit 99.1 hereto and the press release attached as Exhibit 99.3 hereto contain “forward-looking statements” within the meaning of Section 27A of the U.S. Securities Act of 1933, as amended, and Section 21E of the U.S. Securities Exchange Act of 1934, as amended, which statements involve substantial risks and uncertainties. Forward-looking statements generally relate to future events or the Company’s future financial or operating performance. In some cases, you can identify these statements because they contain words such as “may,” “will,” “believes,” “expects,” “anticipates,” “estimates,” “projects,” “intends,” “should,” “seeks,” “future,” “continue,” “plan,” “target,” “predict,” “potential,” or the negative of such terms, or other comparable terminology that concern the Company’s expectations, strategy, plans, or intentions. Forward-looking statements relating to expectations about future results or events are based upon information available to the Company as of today’s date and are not guarantees of the future performance of the Company, and actual results may vary materially from the results and expectations discussed. The Company’s expectations and beliefs regarding these matters may not materialize, and actual results in future periods are subject to risks and uncertainties that could cause actual results to differ materially from those projected, including, without limitation, the risks and uncertainties described under Item 3. “Key Information – D. Risk Factors” and elsewhere in the Company’s Annual Report on Form 20-F filed with the SEC on May 7, 2026, and other filings with the SEC. Should any of these risks or uncertainties materialize or should the underlying assumptions about the Company’s business and the commercial markets in which the Company operates prove incorrect, actual results may vary materially from those described as anticipated, estimated or expected. All subsequent written and oral forward-looking statements concerning the Company or other matters and attributable to the Company or any person acting on its behalf are expressly qualified in their entirety by the cautionary statements above. The Company does not undertake any obligation to publicly update any of these forward-looking statements to reflect events or circumstances that may arise after the date hereof, except as required by law.

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, thereunto duly authorized.