TWO SIGMA INVESTMENTS, LP

Position in ARQ — Arq, Inc.

CIK 1179392 NEW YORK, NY

Position in ARQ

as of Jun 30, 2026 · filed Aug 14, 2026 Compact

Position Value

$642,031

+$568,559 QoQ

Shares Held

251,777

+777.3% QoQ

Ownership

0.577%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

#19

of 100 holders

Holding Since

Jun 2020

13 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Industrials · as of Jun 30, 2026

TWO SIGMA INVESTMENTS, LP holds $127,483,908 across 9 Pollution & Treatment Controls names. ARQ ranks #5 (0.5% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	CECO	Ceco Environmental Corp	1,013,412	$91,957,004
2	ZWS	Zurn Elkay Water Solutions Corp	496,887	$25,107,700
3	VLTO	Veralto Corp	71,038	$6,299,649
4	ERII	Energy Recovery, Inc.	232,829	$2,100,117
5	ARQ	Arq, Inc. This page	251,777	$642,031
6	ADUR	Aduro Clean Technologies Inc.	40,616	$640,108
7	FTEK	Fuel Tech, Inc.	168,457	$372,289
8	PCT	PureCycle Technologies, Inc.	41,815	$339,119

13 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$642,031	251,777	+777.3%	Shares	Sole	2026-08-14
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.