SIMPLEX TRADING, LLC

Position in ERII — Energy Recovery, Inc.

CIK 1488542 CHICAGO, IL

Position in ERII

as of Mar 31, 2026 · filed May 14, 2026 Compact

Position Value

$101,505

+$97,445 QoQ

Shares Held

10,080

+3248.8% QoQ

Ownership

0.020%

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

SIMPLEX TRADING, LLC holds $627,102 across 6 Pollution & Treatment Controls names. ERII ranks #2 (16.2% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	PCT	PureCycle Technologies, Inc.	80,644	$418,542
2	ERII	Energy Recovery, Inc. This page	10,080	$101,505
3	ARQ	Arq, Inc.	21,981	$56,271
4	ADUR	Aduro Clean Technologies Inc.	2,533	$26,571
5	VLTO	Veralto Corp	260	$22,989
6	FTEK	Fuel Tech, Inc.	1,004	$1,224

13 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$101,505	10,080	+3248.8%	Shares	Sole	2026-05-14
2025-12-31	$4,060	301	-81.1%	Shares	Sole	2026-02-11
2025-06-30	$20,384	1,595	-81.7%	Shares	Sole	2025-08-05
2025-03-31	$138,258	8,701	+664.6%	Shares	Sole	2025-05-12
2024-06-30	$15,124	1,138	-57.6%	Shares	Sole	2024-07-25
2024-03-31	$42,380	2,684	+590.0%	Shares	Sole	2024-04-25
2023-12-31	$7,328	389	-53.5%	Shares	Sole	2024-02-02
2023-09-30	$17,731	836	-97.0%	Shares	Sole	2023-11-01
2021-03-31	$508,439	27,723	-8.5%	Shares	Sole	2021-04-26
2020-12-31	$413,182	30,292	+137.2%	Shares	Sole	2021-02-02
2020-09-30	$104,722	12,771	-6.5%	Shares	Sole	2020-10-14
2020-06-30	$103,800	13,658	-49.4%	Shares	Sole	2020-07-13
2020-03-31	$200,760	26,984	—	Shares	Sole	2020-04-29
No filing history on record for this holder in this stock.