$HTOO

$1.75 -$0.07 (3.85%) Close

$HTOO Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 2.3M shares outstanding

Who owns HTOO?

By type of holder

Institutions 1.0% Insiders 0.0% Everyone else 99.1%

Concentration Top 10 holders own 36.7%

Frederico Figueira de Chaves 18.3% · John-Paul Backwell 17.5%

Institutional ownership

1.0%

+0.7 pts vs last qtr

Institutional holders

+2 vs last qtr

Net shares bought

+16.9K

by institutions in Q2 2026

New / sold out

3 / 1

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Citadel Advisors LLC NEW +17.7K
Ameritas Advisory Services, LLC NEW +15

Biggest sellers in Q2 2026

UBS Group AG −814
Royal Bank Of Canada SOLD OUT −28

Who is planning to sell?

No insider has filed a notice of proposed sale (Form 144) for Fusion Fuel Green PLC in the last 12 months.

Is your stake being diluted?

There are not yet two fiscal years of reported share counts for Fusion Fuel Green PLC.

How patient are the owners?

Institutional shares by how long they've been held

5+ years0% 3–5 years0% 1–3 years0% Under 1 year100%

Quarterly turnover

189.7%

of institutional shares changed hands

Top 10 managers, median time held

3 quarters

Super Investors

Investment managers reporting HTOO on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
CA Citadel Advisors LLC	17.7K	0.77%	NEW	Q2 '26	0.0%
Shares held by quarter Peak holding17.7K (Q2'26) Change over 8 quarters+17.7K Share of the company0.770% Citadel Advisors LLC's full portfolio →
UG UBS Group AG	2.9K	0.13%	−814 (−21.9%)	Q3 '25	0.0%
Shares held by quarter Peak holding3.7K (Q1'26) Change over 8 quarters+2.9K Share of the company0.130% UBS Group AG's full portfolio →

Citadel Advisors LLC

17.7K

% of company

0.77%

Change vs last qtr

NEW

Held since

Q2 '26

UBS Group AG

2.9K

% of company

0.13%

Change vs last qtr

−814 (−21.9%)

Held since

Q3 '25

9 more super investors behind a free account

See every manager holding Fusion Fuel Green PLC, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting HTOO on Form N-PORT; together they hold 0.0% of the company

No fund reports holding HTOO yet.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
FF Frederico Figueira de Chaves 5%+ holder 13D · 17.2%	418.4K	18.28%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company18.280% Disclosed stake13D · 17.2% View the 13D/G filing →
JB John-Paul Backwell 5%+ holder 13D · 16.6%	400.0K	17.48%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company17.480% Disclosed stake13D · 16.6% View the 13D/G filing →

Frederico Figueira de Chaves

5%+ holder13D · 17.2%

418.4K

% of company

18.28%

Change vs last qtr

—

Held since

—

John-Paul Backwell

5%+ holder13D · 16.6%

400.0K

% of company

17.48%

Change vs last qtr

—

Held since

—

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