Insider Transactions Reported by 6 Insiders of FUEL TECH, INC.

Symbol: FTEK on Nasdaq
Location: Warrenville, IL

Quick Takeaways

FTEK - FUEL TECH, INC. has 6 insiders with reported activity on this page.
Net insider value flow over the last year: -$8,643.
Recent transaction rows are available for direct filing-level review.

What Changed

Buy value: $12,400; sell value: $21,042.
Net share flow: -2,627.

Why This Matters

This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.

Source Evidence

Filed on Form 4

Issuer insider activity is sourced from SEC Forms 3, 4, and 5.

See Original Filing

Insider trading overview

Last 12 months

Net insider flow leans to selling over the last 12 months. Net value: -$8,643.

Buys

$12,400

Shares: 10,000

Insiders: 1

Sells

$21,043

Shares: 12,627

Insiders: 1

Net

-$8,643

Shares: -2,627

Insiders: 0

Window (months)	Buy shares	Sell shares	Buy $	Sell $	Net $
0-3	10,000	0	$12,400	$0	+$12,400
3-6	0	0	$0	$0	$0
6-9	0	0	$0	$0	$0
9-12	0	12,627	$0	$21,043	-$21,043

FUEL TECH, INC. executives and other stock owners filed with the SEC include:

Name	Relationship	Holdings Value	Past Year Net Change	Change %	Valuation	Report Date
Vincent J. Arnone	President & CEO, Director	$681,396	+$12,400	+1.9%	Filing P/S	24 Mar 2026
Sharon L. Jones	Director	$157,925	-$21,043	-12%	Mixed	04 Jun 2025
Albrecht Ellen T.	Chief Financial Officer	$107,589			Mixed	24 Mar 2026
Douglas G. Bailey	Director	$17,985			Mixed	04 Jun 2025
Dennis L. Zeitler	Director	$17,985			Mixed	04 Jun 2025
William E. Cummings Jr.	Senior Vice President, Sales	$11,271			Mixed	24 Mar 2026

Top shareholders of FUEL TECH, INC. (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
GRACE & WHITE INC /NY	13D/G 13F	Grace & White, Inc. · Company	5%	1,541,307	$2,111,591	+$75,931	31 Mar 2026	13D/G 13F
RENAISSANCE TECHNOLOGIES LLC	13F	Company	4.6%	1,407,806	$1,717,523	—	31 Mar 2026	13F
VANGUARD CAPITAL MANAGEMENT LLC	13F	Company	3.2%	987,998	$1,205,358	—	31 Mar 2026	13F
Vincent J. Arnone	3/4/5	President & CEO, Director	— mixed-class rows	570,363 mixed-class rows	$681,396	+$12,400	24 Mar 2026	3/4/5
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	1.7%	532,808	$650,106	—	31 Mar 2026	13F
Peapod Lane Capital LLC	13F	Company	1.6%	478,842	$582,123	—	31 Mar 2026	13F
BlackRock, Inc.	13F	Company	1.3%	410,364	$500,644	—	31 Mar 2026	13F
US BANCORP \DE\	13F	Company	0.99%	304,776	$371,827	—	31 Mar 2026	13F
GSA CAPITAL PARTNERS LLP	13F	Company	0.8%	246,252	$300,000	—	31 Mar 2026	13F
TWO SIGMA INVESTMENTS, LP	13F	Company	0.78%	238,079	$290,456	—	31 Mar 2026	13F
CITADEL ADVISORS LLC	13F	Company	0.72%	221,399	$270,107	—	31 Mar 2026	13F
Beartown Capital Management, LLC	13F	Company	0.48%	146,689	$178,961	—	31 Mar 2026	13F
SUSQUEHANNA INTERNATIONAL GROUP, LLP	13F	Company	0.46%	140,092	$170,912	—	31 Mar 2026	13F
VANGUARD FIDUCIARY TRUST CO	13F	Company	0.43%	132,505	$161,656	—	31 Mar 2026	13F
Sharon L. Jones	3/4/5	Director	— mixed-class rows	98,973 mixed-class rows	$157,925	-$21,043	04 Jun 2025	3/4/5
STATE STREET CORP	13F	Company	0.4%	121,846	$148,652	—	31 Mar 2026	13F
XTX Topco Ltd	13F	Company	0.39%	118,247	$144,261	—	31 Mar 2026	13F
INTEGRITY WEALTH ADVISORS, INC.	13F	Company	0.37%	115,000	$140,300	—	31 Mar 2026	13F
Albrecht Ellen T.	3/4/5	Chief Financial Officer	— mixed-class rows	100,034 mixed-class rows	$107,589	—	24 Mar 2026	3/4/5
ESSEX INVESTMENT MANAGEMENT CO LLC	13F	Company	0.25%	77,250	$94,245	—	31 Mar 2026	13F
JANE STREET GROUP, LLC	13F	Company	0.23%	70,797	$86,373	—	31 Mar 2026	13F
GROUP ONE TRADING LLC	13F	Company	0.13%	40,215	$49,062	—	31 Mar 2026	13F
Integrated Wealth Concepts LLC	13F	Company	0.11%	35,000	$42,700	—	31 Mar 2026	13F
NORTHERN TRUST CORP	13F	Company	0.1%	31,435	$38,351	—	31 Mar 2026	13F
Cresset Asset Management, LLC	13F	Company	0.08%	25,500	$31,110	—	31 Mar 2026	13F
MARSHALL WACE, LLP	13F	Company	0.07%	21,770	$26,559	—	31 Mar 2026	13F
DIMENSIONAL FUND ADVISORS LP	13F	Company	0.06%	19,428	$23,579	—	31 Mar 2026	13F
Chicago Partners Investment Group LLC	13F	Company	0.06%	17,088	$23,069	—	31 Mar 2026	13F
Legato Capital Management LLC	13F	Company	0.06%	18,165	$22,161	—	31 Mar 2026	13F
Dennis L. Zeitler	3/4/5	Director	— class O/S missing	15,000	$17,985	—	04 Jun 2025	3/4/5
Douglas G. Bailey	3/4/5	Director	— class O/S missing	15,000	$17,985	—	04 Jun 2025	3/4/5
LexAurum Advisors, LLC	13F	Company	0.05%	14,160	$17,275	—	31 Mar 2026	13F
Covestor Ltd	13F	Company	0.04%	12,426	$15,000	—	31 Mar 2026	13F
HighTower Advisors, LLC	13F	Company	0.03%	10,440	$12,737	—	31 Mar 2026	13F
William E. Cummings Jr.	3/4/5	Senior Vice President, Sales	— class O/S missing	6,250	$11,271	—	24 Mar 2026	3/4/5
Founders Capital Management	13F	Company	0.02%	6,000	$7,320	—	31 Mar 2026	13F
Vanguard Global Advisers, LLC	13F	Company	0.02%	5,500	$6,710	—	31 Mar 2026	13F
Tower Research Capital LLC (TRC)	13F	Company	0.01%	3,211	$3,917	—	31 Mar 2026	13F
New England Capital Financial Advisors LLC	13F	Company	0.01%	2,000	$2,440	—	31 Mar 2026	13F
OSAIC HOLDINGS, INC.	13F	Company	0%	1,200	$1,464	—	31 Mar 2026	13F
SIMPLEX TRADING, LLC	13F	Company	0%	1,004	$1,224	—	31 Mar 2026	13F
Advisory Services Network, LLC	13F	Company	0%	900	$1,098	—	31 Mar 2026	13F
SBI Securities Co., Ltd.	13F	Company	0%	710	$866	—	31 Mar 2026	13F
Steward Partners Investment Advisory, LLC	13F	Company	0%	600	$732	—	31 Mar 2026	13F
Wilmington Savings Fund Society, FSB	13F	Company	0%	500	$610	—	31 Mar 2026	13F
Orion Capital Management LLC	13F	Company	0%	100	$122	—	31 Mar 2026	13F
MORGAN STANLEY	13F	Company	0%	21	$26	—	31 Mar 2026	13F
FMR LLC	13F	Company	0%	18	$22	—	31 Mar 2026	13F
Caitong International Asset Management Co., Ltd	13F	Company	0%	3	$4	—	31 Mar 2026	13F
UBS Group AG	13F	Company	0%	1	$1	—	31 Mar 2026	13F

Recent Insider Transactions by Companies or Individuals for FUEL TECH, INC.

Showing up to 300 most recent insider transactions from the last 12 months.

Insider	Symbol	Class	Transaction	%	Value $	* Price $	Shares	Shares Owned	Date	Ownership
Albrecht Ellen T.	FTEK	Restricted Stock Units	Award				8,350	8,350	24 Mar 2026	Direct
Vincent J. Arnone	FTEK	Restricted Stock Units	Award				20,850	20,850	24 Mar 2026	Direct
William E. Cummings Jr.	FTEK	Restricted Stock Units	Award				6,250	6,250	24 Mar 2026	Direct
Vincent J. Arnone	FTEK	Common Stock	Purchase	1.85%	$12,400	$1.24	10,000	549,513	06 Mar 2026	Direct
Douglas G. Bailey	FTEK	Restricted Stock Units	Award				15,000	15,000	04 Jun 2025	Direct
Sharon L. Jones	FTEK	Common Stock	Sale	-13.1%	$21,043	$1.67	-12,627	83,973	04 Jun 2025	Direct
Sharon L. Jones	FTEK	Restricted Stock Units	Award				15,000	15,000	04 Jun 2025	Direct
Dennis L. Zeitler	FTEK	Restricted Stock Units	Award				15,000	15,000	04 Jun 2025	Direct

* An asterisk sign (*) next to the price indicates that the price is likely invalid.