$FTEK

$1.56 +$0.08 (5.76%) Close

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

Ownership

13F as of Q2 2026 · 31.2M shares outstanding

Who owns FTEK?

By type of holder

Institutions 23.5% Insiders 2.0% Everyone else 74.5%

Concentration Top 10 holders own 21.8%

Grace & White Inc /ny 4.9% · Renaissance Technologies LLC 3.5%

Institutional ownership

23.5%

-0.8 pts vs last qtr

Institutional holders

-4 vs last qtr

Net shares bought

−238.2K

by institutions in Q2 2026

New / sold out

6 / 10

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Peapod Lane Capital LLC +341.8K
Marquette Asset Management, LLC NEW +110.5K

Biggest sellers in Q2 2026

Renaissance Technologies LLC −305.4K
Citadel Advisors LLC −202.3K

Who is planning to sell?

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

Is your stake being diluted?

Diluted share count, FY2016–FY2025

+32.4%

+3.17% a year

Each share's claim on the business

−24.5%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

— vs $5.94M

over 10 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years72% 3–5 years2% 1–3 years11% Under 1 year14%

Quarterly turnover

12.9%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting FTEK on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
GW Grace & White Inc /ny	1.5M	4.94%	Unchanged	≤2021	0.5%
Shares held by quarter Peak holding1.9M (Q1'25) Change over 8 quarters−326.8K Share of the company4.940% Grace & White Inc /ny's full portfolio →
RT Renaissance Technologies LLC	1.1M	3.53%	−305.4K (−21.7%)	≤2021	0.0%
Shares held by quarter Peak holding1.4M (Q1'26) Change over 8 quarters+201.0K Share of the company3.530% Renaissance Technologies LLC's full portfolio →

Grace & White Inc /ny

1.5M

% of company

4.94%

Change vs last qtr

Unchanged

Held since

≤2021

Renaissance Technologies LLC

1.1M

% of company

3.53%

Change vs last qtr

−305.4K (−21.7%)

Held since

≤2021

28 more super investors behind a free account

See every manager holding Fuel Tech Inc, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting FTEK on Form N-PORT; together they hold 5.0% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$1.62M	731.7K	2.34%	0.00%	June 30, 2026
VE Vanguard Extended Market Index Fund Vanguard Index Funds	$564K	255.3K	0.82%	0.00%	June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$1.62M

% of company

2.34%

% of the fund

0.00%

As of

June 30, 2026

Vanguard Extended Market Index Fund

Vanguard Index Funds

Position value

$564K

% of company

0.82%

% of the fund

0.00%

As of

June 30, 2026

10 more funds behind a free account

See every fund holding Fuel Tech Inc and how much of the fund the position is.

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
AV Arnone Vincent J Insider	549.5K	1.76%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company1.760% Arnone Vincent J's insider activity →
JS Jones Sharon L Insider	84.0K	0.27%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.270% Jones Sharon L's insider activity →

Arnone Vincent J

Insider

549.5K

% of company

1.76%

Change vs last qtr

—

Held since

—

Jones Sharon L

Insider

84.0K

% of company

0.27%

Change vs last qtr

—

Held since

—

1 more holders behind a free account

See every insider and 5%+ holder of Fuel Tech Inc.

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