# EDGAR Filing Document

**Accession Number:** 0001819794
**File Stem:** 0001493152-26-011370
**Filing Date:** 2026-3
**Character Count:** 5116
**Document Hash:** bff623eed0f806a6c82e9b01b4d0641c
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001493152-26-011370.hdr.sgml**: 20260318

**ACCESSION NUMBER**: 0001493152-26-011370

**CONFORMED SUBMISSION TYPE**: 3

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260318

**FILED AS OF DATE**: 20260318

**DATE AS OF CHANGE**: 20260318

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Figueira de Chaves Frederico
- **CENTRAL INDEX KEY:** 0002093053

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 3
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-39789
- **FILM NUMBER:** 26771032

**MAIL ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** C/O 9 PEMBROKE STREET UPPER
- **CITY:** DUBLIN
- **PROVINCE COUNTRY:** L2
- **ZIP:** D02 KR83
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Fusion Fuel Green PLC
- **CENTRAL INDEX KEY:** 0001819794
- **STANDARD INDUSTRIAL CLASSIFICATION:** MISC INDUSTRIAL & COMMERCIAL MACHINERY & EQUIPMENT [3590]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 000000000
- **STATE OF INCORPORATION:** L2
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** 10 EARLSFORT TERRACE
- **STREET 2:** DUBLIN 2
- **CITY:** DUBLIN
- **PROVINCE COUNTRY:** L2
- **BUSINESS PHONE:** 351 21 581 8802

**MAIL ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** 10 EARLSFORT TERRACE
- **STREET 2:** DUBLIN 2
- **CITY:** DUBLIN
- **PROVINCE COUNTRY:** L2

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Fusion Fuel Green Ltd
- **DATE OF NAME CHANGE:** 20200731

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 3

### INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Figueira de Chaves Frederico<br><sub>(Last) (First) (Middle)</sub><br>C/O FUSION FUEL GREEN PLC<br>9 PEMBROKE STREET UPPER<br><sub>(Street)</sub><br>DUBLIN, IRELAND D02 KR83<br><sub>(City) (State) (Zip)</sub> | **3. Issuer Name and Ticker or Trading Symbol**<br>Fusion Fuel Green PLC [ HTOO ] | **5. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  |
| **2. Date of Event Requiring Statement (Month/Day/Year)**<br>2026-03-18 | **4. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director   [ ] 10% Owner<br>[X] Officer (give title below)   [ ] Other (specify below)<br>_Interim CFO_ | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities Beneficially Owned

---

|  |  |  |  |
| --- | --- | --- | --- |
| 1. Title of Security | 2. Amount of Securities Beneficially Owned | 3. Ownership Form | 4. Nature of Indirect Beneficial Ownership |
| Class A Ordinary Shares | 6352 | I | Held by Key Family Holding Investimentos e Consultoria de Gestao, Ltd |

---

## Table II - Derivative Securities Beneficially Owned

---

|  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 3. Title and Amount of Underlying Securities | 3. Title and Amount of Underlying Securities | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| Share Option (Right to Buy) | <sup>(1)</sup> | 2029-01-01 | Class A Ordinary Shares | 5715 | $367.50 | D |  |
| Share Option (Right to Buy) | <sup>(2)</sup> | 2032-10-09 | Class A Ordinary Shares | 400000 | $4.53 | D |  |
| Restricted Share Units | 2021-08-18 | <sup>(3)</sup> | Class A Ordinary Shares | 143 | $0 | D |  |
| Restricted Share Units | 2024-05-10 | <sup>(3)</sup> | Class A Ordinary Shares | 286 | $0 | D |  |

---

### Footnotes:

(1) Vested equally over three years.

(2) Vests in three equal installments on December 31, 2025, December 31, 2026, and December 31, 2027.

(3) Does not expire.

**Signature:** /s/ Frederico Figueira de Chaves  
**Date:** 2026-03-18

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**