Fusion Fuel Green PLC (HTOO) Ownership
HTOO ownership summary
as of October 18, 2026- Institutions
- 0.3% of shares outstanding
- Insiders
- 7.76% of shares outstanding
- Shares outstanding
- 7.5M
- Float
- 2.7M shares available to trade
- Short interest
- 0.28% 21K shares short
- Days to cover
- 0.17 short interest up 12.3% vs prior month
- Institutions 0.29%
- Insiders 7.76%
- Other investors 91.95%
HTOO top institutional holders
13 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Citadel Advisors Llc | 0.54% | 18K | $33,949 | +17,682 (0.0%) | June 30, 2026 |
| 2 | UBS Group AG | 0.09% | 2,911 | $5,589 | −814 (−21.9%) | June 30, 2026 |
| 3 | Morgan Stanley - Brokerage Accounts | 0.03% | 1,015 | $1,949 | — | June 30, 2026 |
| 4 | SBI Securities Co Ltd | <0.01% | 99 | $190 | — | June 30, 2026 |
| 5 | Royal Bank of Canada | <0.01% | 28 | $54 | — | March 31, 2026 |
| 6 | Ameritas Advisory Services, LLC | <0.01% | 15 | $29 | +15 (0.0%) | June 30, 2026 |
| 7 | Creative Financial Designs Inc | <0.01% | 11 | $21 | — | June 30, 2026 |
| 8 | NATIONAL BANK OF CANADA /FI/ | <0.01% | 7 | $13 | — | June 30, 2026 |
| 9 | Genworth Financial Wealth Mgmt Inc | <0.01% | 6 | $12 | +6 (0.0%) | June 30, 2026 |
| 10 | JONES FINANCIAL COMPANIES LLLP | <0.01% | 3 | $6 | — | June 30, 2026 |
| 11 | Group One Trading, LLC | 0.00% | 1 | $2 | — | June 30, 2026 |
| 12 | Mercer Global Advisors Inc. | 0.00% | 1 | $2 | +1 (0.0%) | June 30, 2026 |
| 13 | Citigroup Inc | 0.00% | — | — | −15 (−100.0%) | March 31, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 13, 4 holders added 18K shares and 2 cut 829.
HTOO top mutual fund and ETF holders
2 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Fidelity Total Bond ETF | 0.27% | 8,817 | $16,929 | — | September 30, 2026 |
| 2 | Fidelity US Loan Acc USD | 0.19% | 6,317 | $12,129 | — | September 9, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
HTOO shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns HTOO
Institutional investors own 0.3% of Fusion Fuel Green's shares and insiders 7.76%. The largest holder is Citadel Advisors Llc with 0.54% of the shares (18K), as of June 30, 2026. Among the top 13 institutions, 4 added shares and 2 reduced their stake in the latest filings. Short interest is 0.28% of the float, or 0.17 days of average trading volume. The share count rose 2,288,200.0% since 2019.
Related: HTOO key metrics. See the HTOO stock overview for the latest quote and news.
HTOO ownership FAQ
Who owns the most Fusion Fuel Green stock?
The largest shareholders of Fusion Fuel Green are Citadel Advisors Llc (0.54%), UBS Group AG (0.09%), Morgan Stanley - Brokerage Accounts (0.03%), SBI Securities Co Ltd (<0.01%), Royal Bank of Canada (<0.01%).
What percentage of Fusion Fuel Green is owned by institutions?
Institutions hold 0.3% of Fusion Fuel Green's shares outstanding; insiders hold 7.76%.
Which funds own Fusion Fuel Green?
The largest fund holders of Fusion Fuel Green are Fidelity Total Bond ETF (0.27%), Fidelity US Loan Acc USD (0.19%).
What is Fusion Fuel Green's short interest?
21K shares of Fusion Fuel Green were sold short, 0.28% of the float; at the average daily volume it would take 0.17 days to cover.
How many shares of Fusion Fuel Green are outstanding?
Fusion Fuel Green has 7.5M shares outstanding, of which 2.7M are in the public float.