SIMPLEX TRADING, LLC

Position in ARQ — Arq, Inc.

CIK 1488542 CHICAGO, IL

Position in ARQ

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

Position Value

$56,271

+$48,715 QoQ

Shares Held

21,981

+851.1% QoQ

Ownership

0.051%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Dec 2021

10 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. ARQ ranks #3 (9.0% 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. This page	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.	1,004	$1,224

10 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$56,271	21,981	+851.1%	Shares	Sole	2026-05-14
2025-12-31	$7,556	2,311	-63.0%	Shares	Sole	2026-02-11
2025-03-31	$26,054	6,248	+2933.0%	Shares	Sole	2025-05-12
2024-06-30	$1,250	206	-59.6%	Shares	Sole	2024-07-25
2023-12-31	$1,519	510	-29.4%	Shares	Sole	2024-02-02
2023-03-31	$1,429	722	-65.0%	Shares	Sole	2023-04-27
2022-12-31	$5,005	2,060	+154.6%	Shares	Sole	2023-02-02
2022-09-30	$2,208	809	-96.5%	Shares	Sole	2022-11-04
2022-03-31	$143,004	22,991	+88.1%	Shares	Sole	2022-05-02
2021-12-31	$80,936	12,226	—	Shares	Sole	2022-02-23
No filing history on record for this holder in this stock.