D. E. Shaw & Co., Inc.

Position in ARQ — Arq, Inc.

CIK 1009207 New York, NY

Position in ARQ

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

Position Value

$721,478

+$557,436 QoQ

Shares Held

281,828

+461.8% QoQ

Ownership

0.657%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

13 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Industrials · as of Mar 31, 2026

D. E. Shaw & Co., Inc. holds $21,681,431 across 4 Pollution & Treatment Controls names. ARQ ranks #2 (3.3% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	VLTO	Veralto Corp	228,038	$20,163,119
2	ARQ	Arq, Inc. This page	281,828	$721,478
3	ZWS	Zurn Elkay Water Solutions Corp	14,649	$656,861
4	ERII	Energy Recovery, Inc.	13,900	$139,973

13 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$721,478	281,828	+461.8%	Shares	Defined	2026-05-15
2025-12-31	$164,042	50,166	-18.5%	Shares	Defined	2026-02-17
2022-09-30	$168,034	61,551	0.0%	Shares	Defined	2022-11-14
2022-06-30	$288,674	61,551	0.0%	Shares	Defined	2022-08-15
2022-03-31	$382,847	61,551	+9.7%	Shares	Defined	2022-05-16
2021-12-31	$371,534	56,123	+17.8%	Shares	Defined	2022-02-14
2021-09-30	$304,496	47,652	+32.2%	Shares	Defined	2021-11-15
2021-06-30	$267,078	36,043	-1.2%	Shares	Defined	2021-08-16
2021-03-31	$200,546	36,463	-52.0%	Shares	Defined	2021-05-17
2020-12-31	$417,417	75,894	-24.0%	Shares	Defined	2021-02-16
2020-09-30	$405,472	99,870	-21.6%	Shares	Defined	2020-11-16
2020-06-30	$617,438	127,307	+9.6%	Shares	Defined	2020-08-14
2020-03-31	$763,374	116,191	—	Shares	Defined	2020-05-15
No filing history on record for this holder in this stock.