RHUMBLINE ADVISERS

Position in ARQ — Arq, Inc.

CIK 1115418 BOSTON, MA

Position in ARQ

as of Mar 31, 2026 · filed May 12, 2026 Compact

Position Value

$105,461

-$29,724 QoQ

Shares Held

41,196

-0.4% QoQ

Ownership

0.096%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

#35

of 95 holders

Holding Since

Mar 2020

16 quarters on record

Voting authority Sole 20.535974366443345.ToString("F0")% Shared 0.ToString("F0")% None 79.46402563355666.ToString("F0")%

Industrials · as of Mar 31, 2026

RHUMBLINE ADVISERS holds $64,007,218 across 6 Pollution & Treatment Controls names. ARQ ranks #6 (0.2% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	VLTO	Veralto Corp	479,157	$42,367,061
2	ZWS	Zurn Elkay Water Solutions Corp	398,369	$17,862,865
3	CECO	Ceco Environmental Corp	36,031	$2,146,726
4	PCT	PureCycle Technologies, Inc.	167,316	$868,370
5	ERII	Energy Recovery, Inc.	65,217	$656,735
6	ARQ	Arq, Inc. This page	41,196	$105,461

16 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$105,461	41,196	-0.4%	Shares	Sole	2026-05-12
2025-12-31	$135,185	41,341	-7.0%	Shares	Sole	2026-02-13
2025-09-30	$318,168	44,437	-0.4%	Shares	Sole	2025-11-06
2025-06-30	$239,539	44,607	+65.7%	Shares	Sole	2025-08-12
2025-03-31	$112,252	26,919	-5.4%	Shares	Sole	2025-05-29
2024-12-31	$215,374	28,451	+3.5%	Shares	Sole	2025-05-29
2024-09-30	$161,389	27,494	-10.6%	Shares	Sole	2024-11-12
2024-06-30	$186,591	30,740	+3667.2%	Shares	Sole	2024-08-01
2024-03-31	$5,287	816	0.0%	Shares	Sole	2024-05-09
2023-09-30	$1,452	816	0.0%	Shares	Sole	2023-11-09
2023-06-30	$1,517	816	-97.2%	Shares	Sole	2023-08-08
2021-03-31	$161,628	29,387	0.0%	Shares	Sole	2021-05-06
2020-12-31	$161,628	29,387	+12.8%	Shares	Sole	2021-02-10
2020-09-30	$105,779	26,054	-11.5%	Shares	Sole	2020-11-12
2020-06-30	$142,706	29,424	+23.7%	Shares	Sole	2020-08-13
2020-03-31	$156,326	23,794	—	Shares	Sole	2020-05-06
No filing history on record for this holder in this stock.