SIMPLEX TRADING, LLC

Position in CECO — Ceco Environmental Corp

CIK 1488542 CHICAGO, IL

Position in CECO

as of Jun 30, 2026 · filed Aug 12, 2026 Compact

Position Value

$519,940

+$480,619 QoQ

Shares Held

5,730

+772.1% QoQ

Ownership

0.010%

of shares outstanding

% of Portfolio

0.02%

of 13F equity value

Holder Rank

#217

of 344 holders

Holding Since

Sep 2020

15 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Industrials · as of Jun 30, 2026

SIMPLEX TRADING, LLC holds $1,932,554 across 5 Pollution & Treatment Controls names. CECO ranks #2 (26.9% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	PCT	PureCycle Technologies, Inc.	165,828	$1,344,865
2	CECO	Ceco Environmental Corp This page	5,730	$519,940
3	ARQ	Arq, Inc.	15,004	$38,260
4	FTEK	Fuel Tech, Inc.	10,491	$23,185
5	ERII	Energy Recovery, Inc.	699	$6,304

15 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$519,940	5,730	+772.1%	Shares	Sole	2026-08-12
2025-12-31	$39,321	657	-93.5%	Shares	Sole	2026-02-11
2024-09-30	$286,004	10,142	+11.1%	Shares	Sole	2024-11-08
2024-06-30	$263,256	9,125	+420.5%	Shares	Sole	2024-07-25
2024-03-31	$40,354	1,753	+1653.0%	Shares	Sole	2024-04-25
2023-09-30	$1	100	-90.0%	Shares	Sole	2023-11-01
2023-06-30	$13,306	996	-65.1%	Shares	Sole	2023-08-04
2022-12-31	$33,288	2,850	-43.7%	Shares	Sole	2023-02-02
2022-09-30	$44,825	5,065	+2538.0%	Shares	Sole	2022-11-04
2022-06-30	$1,148	192	-87.1%	Shares	Sole	2022-08-03
2022-03-31	$8,185	1,491	-7.2%	Shares	Sole	2022-05-02
2021-12-31	$10,011	1,607	-45.3%	Shares	Sole	2022-02-23
2021-09-30	$20,683	2,938	0.0%	Shares	Sole	2021-10-28
2021-06-30	$21,036	2,938	+913.1%	Shares	Sole	2021-08-12
2020-09-30	$2,114	290	—	Shares	Sole	2020-10-14
No filing history on record for this holder in this stock.