GSA CAPITAL PARTNERS LLP

Position in ARQ — Arq, Inc.

CIK 1362033 LONDON, X0

Position in ARQ

as of Mar 31, 2026 · filed May 8, 2026 Compact

Position Value

$740,244

+$211,041 QoQ

Shares Held

289,158

+78.7% QoQ

Ownership

0.674%

of shares outstanding

% of Portfolio

0.05%

of 13F equity value

Holder Rank

#13

of 95 holders

Holding Since

Mar 2020

4 quarters on record

Voting authority Sole 100.ToString("F0")% Shared 0.ToString("F0")% None 0.ToString("F0")%

Industrials · as of Mar 31, 2026

GSA CAPITAL PARTNERS LLP holds $4,385,128 across 4 Pollution & Treatment Controls names. ARQ ranks #2 (16.9% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ERII	Energy Recovery, Inc.	313,647	$3,158,425
2	ARQ	Arq, Inc. This page	289,158	$740,244
3	ZWS	Zurn Elkay Water Solutions Corp	10,555	$473,286
4	ZONE	CleanCore Solutions, Inc.	37,004	$13,173

4 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
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.