GSA CAPITAL PARTNERS LLP

Position in ARQ — Arq, Inc.

CIK 1362033 LONDON, X0

Position in ARQ

as of Jun 30, 2026 · filed Aug 6, 2026 Compact

Position Value

$886,635

+$146,391 QoQ

Shares Held

347,700

+20.2% QoQ

Ownership

0.796%

of shares outstanding

% of Portfolio

0.06%

of 13F equity value

Holder Rank

#16

of 100 holders

Holding Since

Mar 2020

5 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Industrials · as of Jun 30, 2026

GSA CAPITAL PARTNERS LLP holds $3,856,456 across 5 Pollution & Treatment Controls names. ARQ ranks #3 (23.0% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ERII	Energy Recovery, Inc.	119,526	$1,078,124
2	ZWS	Zurn Elkay Water Solutions Corp	17,633	$890,995
3	ARQ	Arq, Inc. This page	347,700	$886,635
4	FTEK	Fuel Tech, Inc.	295,141	$652,261
5	CECO	Ceco Environmental Corp	3,840	$348,441

5 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$886,635	347,700	+20.2%	Shares	Sole	2026-08-06
2026-03-31	$740,244	289,158	+78.7%	Shares	Sole	2026-05-08
2025-12-31	$529,203	161,836	+400.5%	Shares	Sole	2026-02-06
2024-12-31	$244,760	32,333	+30.1%	Shares	Sole	2025-02-07
2020-03-31	$163,284	24,853	—	Shares	Sole	2020-05-12
No filing history on record for this holder in this stock.