GSA CAPITAL PARTNERS LLP

Position in ERII — Energy Recovery, Inc.

CIK 1362033 LONDON, X0

Position in ERII

as of Jun 30, 2026 · filed Aug 6, 2026 Compact

Position Value

$1,078,124

-$2,080,301 QoQ

Shares Held

119,526

-61.9% QoQ

Ownership

0.234%

of shares outstanding

% of Portfolio

0.07%

of 13F equity value

Holder Rank

#53

of 197 holders

Holding Since

Sep 2020

11 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Industrials · as of Jun 30, 2026

GSA CAPITAL PARTNERS LLP holds $3,856,456 across 5 Pollution & Treatment Controls names. ERII ranks #1 (28.0% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ERII	Energy Recovery, Inc. This page	119,526	$1,078,124
2	ZWS	Zurn Elkay Water Solutions Corp	17,633	$890,995
3	ARQ	Arq, Inc.	347,700	$886,635
4	FTEK	Fuel Tech, Inc.	295,141	$652,261
5	CECO	Ceco Environmental Corp	3,840	$348,441

11 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$1,078,124	119,526	-61.9%	Shares	Sole	2026-08-06
2026-03-31	$3,158,425	313,647	+186.9%	Shares	Sole	2026-05-08
2025-12-31	$1,474,551	109,307	+167.4%	Shares	Sole	2026-02-06
2025-09-30	$630,307	40,876	-44.2%	Shares	Sole	2025-11-07
2025-06-30	$936,837	73,305	+413.0%	Shares	Sole	2025-07-22
2025-03-31	$227,068	14,290	-88.6%	Shares	Sole	2025-05-08
2024-06-30	$1,668,572	125,551	+790.4%	Shares	Sole	2024-08-15
2023-03-31	$325,028	14,101	-72.1%	Shares	Sole	2023-05-12
2022-06-30	$980,379	50,483	-18.5%	Shares	Sole	2022-08-09
2022-03-31	$1,248,257	61,979	+434.3%	Shares	Sole	2022-05-11
2020-09-30	$95,111	11,599	—	Shares	Sole	2020-11-06
No filing history on record for this holder in this stock.