TWO SIGMA INVESTMENTS, LP

Position in ARQ — Arq, Inc.

CIK 1179392 NEW YORK, NY

Position in ARQ

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

Position Value

$73,472

-$201,341 QoQ

Shares Held

28,700

-20.9% QoQ

Ownership

0.067%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

#40

of 95 holders

Holding Since

Jun 2020

12 quarters on record

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

Industrials · as of Mar 31, 2026

TWO SIGMA INVESTMENTS, LP holds $74,757,505 across 7 Pollution & Treatment Controls names. ARQ ranks #6 (0.1% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	CECO	Ceco Environmental Corp	959,698	$57,178,806
2	ZWS	Zurn Elkay Water Solutions Corp	346,173	$15,522,397
3	ERII	Energy Recovery, Inc.	88,899	$895,212
4	VLTO	Veralto Corp	8,332	$736,715
5	ADUR	Aduro Clean Technologies Inc.	29,762	$312,203
6	ARQ	Arq, Inc. This page	28,700	$73,472
7	SCWO	374Water Inc.	13,627	$38,700

12 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$73,472	28,700	-20.9%	Shares	Sole	2026-05-15
2024-12-31	$274,813	36,303	+26.4%	Shares	Sole	2025-02-14
2024-09-30	$168,551	28,714	-27.8%	Shares	Sole	2024-11-14
2024-06-30	$241,501	39,786	-56.6%	Shares	Sole	2024-08-14
2022-03-31	$570,728	91,757	-35.0%	Shares	Sole	2022-05-16
2021-12-31	$934,035	141,093	-26.2%	Shares	Sole	2022-02-14
2021-09-30	$1,221,998	191,236	-36.9%	Shares	Sole	2021-11-15
2021-06-30	$2,244,563	302,910	+209.4%	Shares	Sole	2021-08-16
2021-03-31	$538,422	97,895	+54.3%	Shares	Sole	2021-05-17
2020-12-31	$348,986	63,452	-33.3%	Shares	Sole	2021-02-16
2020-09-30	$386,402	95,173	+187.0%	Shares	Sole	2020-11-16
2020-06-30	$160,821	33,159	—	Shares	Sole	2020-08-14
No filing history on record for this holder in this stock.