MARSHALL WACE, LLP

Position in ARQ — Arq, Inc.

CIK 1318757 LONDON, X0

Position in ARQ

as of Jun 30, 2026 · filed Aug 13, 2026 Compact

Position Value

$2,244,511

+$171,667 QoQ

Shares Held

880,201

+8.7% QoQ

Ownership

2.02%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

of 100 holders

Holding Since

Mar 2020

15 quarters on record

Voting authority Sole 0% Shared 100% None 0%

Industrials · as of Jun 30, 2026

MARSHALL WACE, LLP holds $16,079,873 across 6 Pollution & Treatment Controls names. ARQ ranks #3 (14.0% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ERII	Energy Recovery, Inc.	677,248	$6,108,775
2	CECO	Ceco Environmental Corp	57,886	$5,252,575
3	ARQ	Arq, Inc. This page	880,201	$2,244,511
4	ADUR	Aduro Clean Technologies Inc.	76,525	$1,206,033
5	VLTO	Veralto Corp	11,528	$1,022,303
6	ZWS	Zurn Elkay Water Solutions Corp	4,862	$245,676

15 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$2,244,511	880,201	+8.7%	Shares	Other	2026-08-13
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	-30.8%	Shares	Sole	2021-11-15
2021-06-30	$2,440,231	329,316	+1510.2%	Shares	Sole	2021-08-13
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.