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: March, 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 March 17, 2026, Fusion Fuel Green PLC, an Irish public limited company (the “Company”), issued a press release relating to certain uranium royalty assets held by Royal Uranium Inc., a company incorporated under the laws of British Columbia, Canada (“Royal Uranium”). A copy of the press release is furnished as Exhibit 99.1 to this Report on Form 6 20-K.F As☒ ~~previously disclosed in a Report on~~ Form 640-KF furnished with the U.S. Securities and Exchange Commission on February 18, 2026, the Company entered into a Share Exchange Agreement (the “Share Exchange Agreement”), dated as of February 18, 2026, among the Company and certain shareholders of Royal Uranium, pursuant to which the Company will acquire up to 100% of the issued and outstanding shares in the capital of Royal Uranium. The closing of the transactions contemplated under the Share Exchange Agreement remain subject to certain closing conditions.☐

On March 17, 2026, the board of directors (the “Board”) of Fusion Fuel Green PLC (“Company”) elected James Passin as a Class III director of the Company. In connection with Mr. Passin’s election, Mr. Passin was appointed as a member of each of the Nominating and Corporate Governance Committee, the Audit Committee, and the Compensation Committee of the Board.

There is no arrangement or understanding between Mr. Passin and any person pursuant to which she was selected as director. There are and have been no transactions in which Mr. Passin has an interest requiring disclosure under Item 404(a) of Regulation S-K.

Under a non-executive director appointment letter between the Company and Mr. Passin in the Company’s standard form, dated March 17, 2026 (the “Director Agreement”), Mr. Passin will be paid a total annual fee of €50,000. Payments will be made quarterly in advance. The Company also agreed to reimburse Mr. Passin for pre-approved reasonable business expenses incurred in good faith in connection with the performance of his duties for the Company. On the same date, the Company and Mr. Passin entered into the Company’s standard form of indemnification agreement.

On March 23, 2026, the Company issued a press release announcing the election of Mr. Passin to the Board. A copy of the press release is furnished as Exhibit 99.1 to this Report on Form 6-K.

Forward-Looking Statements

The press release attached as Exhibit 99.1 hereto (the “Press Release”) and the statements contained therein may include “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. Such forward-looking statements include, but are not limited to, statements regarding the Company’s planned acquisition of a controlling interest in Royal Uranium (as defined in the Press Release) and its expectation to gain royalty exposure to uranium exploration activity across multiple projects without ~~additional cost~~incurring tocertain ~~itself~~direct ~~or the royalty holder~~costs, and statements regarding planned exploration activities at certain uranium projects. Forward-looking ~~The~~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 ability of the parties to the Share Exchange Agreement (as defined in the Press Release) to complete the transaction, the Company’s ability to integrate Royal Uranium’s assets into its business, the ability of the parties to obtain Irish regulatory approval and any other required third-party consents and approvals in connection with the transaction, obtain the approval of the Company’s shareholders, and to meet all other closing conditions; the realization of revenues from the assets of Royal Uranium, including its uranium and natural gas royalties, which may depend on, among other things, the commercial development of uranium and natural gas deposits, the receipt and maintenance of exploration, mining, and environmental permits and approvals by the operators of the underlying properties, regulatory approval, and market demand for uranium and natural gas as sources of energy, volatility in uranium and natural gas commodity prices, which directly affect the potential value of net smelter return and other royalty interests, the risk that operators of royalty-bearing properties may delay, suspend, or abandon exploration or development activities due to insufficient funding, unfavorable economic conditions, technical challenges, or regulatory obstacles, the possibility that exploration activities, including those authorized under recently obtained permits, may not result in the discovery of commercially viable mineral deposits or hydrocarbon reserves, the dependence of the Company on third-party operators over whom it has no operational control, including decisions regarding the pace, scope, and method of exploration and development; the risk that changes in mining, environmental, or energy laws and regulations in the jurisdictions where the royalty assets are located, including Canada, Colombia, and Argentina, which may adversely affect the feasibility or economics of the underlying projects; political, economic, and social risks associated with operating in foreign jurisdictions, including currency controls, expropriation, nationalization, and changes in fiscal regimes, and the risk that royalty agreements may be subject to disputes regarding their scope, enforceability, or the calculation of permitted deductions from gross revenues; competition from existing or new offerings that may emerge; impacts from strategic changes to the Company’s business on net sales, revenues, income from continuing operations, or other results of operations; the Company’s ability to obtain sufficient funding to maintain operations and develop additional services and offerings; and 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 ~~U.S.~~ Securities and Exchange Commission (the “SEC”) on ~~May~~April 930, ~~2025~~2024 (the “Annual Report”), 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 in the Annual Report. 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.

Exhibit No.		Description
99.1		Press Release dated March 17, 2026

This Report on Form 6-K is incorporated by reference into the Company’s registration statements on Form F-3 (File 333-287226, 333-289429, 333-286198, 333-286202, 333-251990, 333-264714, 333-276880, 333-293286, and 333-294414) and Form S-8 (File Nos. 333-258543 and 333-291732) and the prospectuses thereof and any prospectus supplements or amendments thereto.

Exhibit No.		Description
99.1		Press Release dated March 23, 2026

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, thereunto duly authorized.

	Fusion Fuel Green PLC
	(Registrant)
Date: March 17, 2026	/s/ John-Paul Backwell
Date: March 23, 2026	/s/ John-Paul Backwell
	John-Paul Backwell
	Chief Executive Officer

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