SIMPLEX TRADING, LLC

Position in FTEK — Fuel Tech, Inc.

CIK 1488542 CHICAGO, IL

Position in FTEK

as of Mar 31, 2026 · filed May 14, 2026 Compact

Position Value

$1,224

-$3,922 QoQ

Shares Held

1,004

-69.6% QoQ

Ownership

0.003%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

15 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Industrials · as of Mar 31, 2026

SIMPLEX TRADING, LLC holds $627,102 across 6 Pollution & Treatment Controls names. FTEK ranks #6 (0.2% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	PCT	PureCycle Technologies, Inc.	80,644	$418,542
2	ERII	Energy Recovery, Inc.	10,080	$101,505
3	ARQ	Arq, Inc.	21,981	$56,271
4	ADUR	Aduro Clean Technologies Inc.	2,533	$26,571
5	VLTO	Veralto Corp	260	$22,989
6	FTEK	Fuel Tech, Inc. This page	1,004	$1,224

15 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$1,224	1,004	-69.6%	Shares	Sole	2026-05-14
2025-12-31	$5,146	3,299	-92.2%	Shares	Sole	2026-02-11
2025-09-30	$127,503	42,501	+85.5%	Shares	Sole	2025-11-12
2025-06-30	$57,735	22,911	+1796.6%	Shares	Sole	2025-08-05
2025-03-31	$1,268	1,208	+46.1%	Shares	Sole	2025-05-12
2022-12-31	$1,050	827	-62.3%	Shares	Sole	2023-02-02
2022-09-30	$2,564	2,192	+13.6%	Shares	Sole	2022-11-04
2022-06-30	$2,391	1,929	-77.3%	Shares	Sole	2022-08-03
2022-03-31	$12,343	8,513	+4.3%	Shares	Sole	2022-05-02
2021-12-31	$11,422	8,159	-47.1%	Shares	Sole	2022-02-23
2021-09-30	$26,822	15,415	0.0%	Shares	Sole	2021-10-28
2021-06-30	$36,225	15,415	+39.7%	Shares	Sole	2021-08-12
2021-03-31	$34,649	11,035	-52.2%	Shares	Sole	2021-04-26
2020-12-31	$89,511	23,070	+23931.2%	Shares	Sole	2021-02-02
2020-03-31	$38	96	—	Shares	Sole	2020-04-29
No filing history on record for this holder in this stock.