Every 424B that Fusion Fuel Green PLC (HTOO) has filed with the SEC in the last 12 months is listed below, newest first, and each one links through to the document itself with the summary and the scores our analysis gives it.
A 424B covers the supplement that carries the terms of a priced offering, so if you follow HTOO and want that one kind of document rather than the whole filing history, this is the page to keep. The company's other filings, of every form, are on the full HTOO filings page.
Fusion Fuel Green PLC (HTOO) registered for resale by selling shareholders up to 4,993,249 Class A ordinary shares. The company is not selling shares in this resale and will receive no proceeds from those sales. It may receive approximately $2,093,726 in gross proceeds if all August 2026 pre-funded and $3.50 warrants are exercised for cash; if received, it intends to use the proceeds for working capital and general corporate purposes.
The resale shares include 3,750,018 shares issued in exchange for Royal Uranium, 421,563 shares issued in the August 2026 private placement, shares issuable under warrants from that placement, and 47,169 shares issued to Bevilacqua PLLC for legal services. The placement generated $1,525,000 in gross proceeds. The pre-funded warrants cover 176,468 shares at $0.0035 per share, while the $3.50 warrants cover 598,031 shares. Exercises are subject to a 4.99% beneficial-ownership limit, or 9.99% if elected; an increase requires 61 days’ prior written notice.
Fusion Fuel Green PLC is offering up to $6,619,798 of Class A Ordinary Shares through an at-the-market program under a Form F-3 shelf, with H.C. Wainwright & Co. acting as sales agent or principal and earning a 3.0% commission on gross sales.
As of July 21, 2026, there were 7,047,527 Class A Ordinary Shares outstanding; an illustrative sale of 2,460,891 shares at $2.69 would bring total shares to up to 9,508,418, increasing pro forma net tangible book value (deficit) to $(0.53) per share and causing dilution of about $3.22 per share to new investors.
Proceeds are earmarked for working capital and general corporate purposes and may help satisfy a requirement to raise at least $5,000,000 of “Purchaser Financing,” half of which is to be made available to subsidiary Quality Industrial Corp. (QIND) under loan arrangements. The risk section highlights that QIND may be in default on obligations of about $11,175,000 under the Al Shola Gas acquisition agreement, with only about $1,020,000 paid, creating potential for loss of its 51% interest in Al Shola Gas, monetary damages, asset liens, or insolvency and possible material impairment charges at Fusion Fuel, which already carries a going-concern warning.
Fusion Fuel Green PLC has registered up to 2,403,387 Class A Ordinary Shares for resale by identified selling shareholders pursuant to February 2026 advisory agreements and a February 2026 securities purchase agreement. The prospectus states the company is not selling any shares under this registration and will not receive proceeds from resale transactions.
The filing notes the company may receive proceeds if the related pre-funded warrants and warrants are exercised for cash; full cash exercise at the stated prices would yield aggregate gross proceeds of approximately $8,483,138. Shares outstanding were 3,017,842 Class A Ordinary Shares as of March 16, 2026. The registration is subject to a Beneficial Ownership Limitation initially set at 4.99% (holder-elected increase up to 9.99% with 61 days’ notice).
Fusion Fuel Green PLC is registering up to 71,429 Class A ordinary shares for resale by its outside counsel, Bevilacqua PLLC. These shares are issuable upon exercise of a December 2025 warrant that was granted as partial payment of $395,502.28 in legal fees.
The company is not selling shares in this offering and will not receive proceeds from any resale. It may receive up to about $62,858 if the warrant is exercised for cash; the warrant also allows cashless exercise. Shares outstanding were 2,345,718 as of February 5, 2026, rising to 2,417,147 if all warrant shares are issued.
The Class A ordinary shares trade on Nasdaq under the symbol HTOO, with a last reported price of $3.40 on February 11, 2026. The prospectus highlights that investing in these shares involves a high degree of risk, and auditors have noted substantial doubt about the company’s ability to continue as a going concern.