TWO SIGMA SECURITIES, LLC

Broker-Dealer

Position in ARQ — Arq, Inc.

CIK 1450144 NEW YORK, NY

Position in ARQ

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

Position Value

$29,698

New position

Shares Held

11,601

first reported quarter

Ownership

0.027%

of shares outstanding

% of Portfolio

0.01%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2026

1 quarter on record

Voting authority Sole 100% Shared 0% None 0%

Industrials · as of Mar 31, 2026

TWO SIGMA SECURITIES, LLC holds $272,955 across 3 Pollution & Treatment Controls names. ARQ ranks #3 (10.9% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ERII	Energy Recovery, Inc.	13,985	$140,828
2	PCT	PureCycle Technologies, Inc.	19,736	$102,429
3	ARQ	Arq, Inc. This page	11,601	$29,698

1 filing row on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$29,698	11,601	—	Shares	Sole	2026-05-15
No filing history on record for this holder in this stock.