MARSHALL WACE, LLP

Position in ARQ — Arq, Inc.

CIK 1318757 LONDON, X0

Position in ARQ

as of Mar 31, 2026 · filed May 15, 2026 Compact

Position Value

$2,072,844

+$620,288 QoQ

Shares Held

809,705

+82.3% QoQ

Ownership

1.89%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

#5

of 95 holders

Holding Since

Mar 2020

13 quarters on record

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

Industrials · as of Mar 31, 2026

MARSHALL WACE, LLP holds $27,674,853 across 6 Pollution & Treatment Controls names. ARQ ranks #4 (7.5% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	CECO	Ceco Environmental Corp	251,904	$15,008,439
2	VLTO	Veralto Corp	60,940	$5,388,314
3	ZWS	Zurn Elkay Water Solutions Corp	81,752	$3,665,759
4	ARQ	Arq, Inc. This page	809,705	$2,072,844
5	ERII	Energy Recovery, Inc.	106,297	$1,070,409
6	ZONE	CleanCore Solutions, Inc.	1,317,667	$469,088

13 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$2,072,844	809,705	+82.3%	Shares	Other	2026-05-15
2025-12-31	$1,452,556	444,207	+83.8%	Shares	Other	2026-02-13
2025-03-31	$1,007,575	241,625	+13.2%	Shares	Other	2025-05-15
2024-12-31	$1,615,438	213,400	+670.4%	Shares	Other	2025-02-13
2024-09-30	$162,599	27,700	-53.6%	Shares	Other	2024-11-14
2022-09-30	$162,899	59,670	0.0%	Shares	Other	2022-11-14
2022-06-30	$279,852	59,670	-47.6%	Shares	Other	2022-08-15
2022-03-31	$707,960	113,820	-41.9%	Shares	Other	2022-05-16
2021-12-31	$1,296,579	195,858	-14.0%	Shares	Other	2022-02-14
2021-09-30	$1,455,552	227,786	+1013.8%	Shares	Sole	2021-11-15
2021-03-31	$112,486	20,452	+99.4%	Shares	Sole	2021-05-17
2020-06-30	$49,741	10,256	-91.4%	Shares	Sole	2020-08-13
2020-03-31	$780,693	118,827	—	Shares	Sole	2020-05-15
No filing history on record for this holder in this stock.