ESSEX INVESTMENT MANAGEMENT CO LLC

Position in ERII — Energy Recovery, Inc.

CIK 201772 BOSTON, MA

Position in ERII

as of Mar 31, 2026 · filed May 11, 2026 Compact

Position Value

$1,332,482

-$490,017 QoQ

Shares Held

132,322

-2.1% QoQ

Ownership

0.257%

of shares outstanding

% of Portfolio

0.21%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

25 quarters on record

Voting authority Sole 99.05986910717795.ToString("F0")% Shared 0.ToString("F0")% None 0.9401308928220553.ToString("F0")%

Industrials · as of Mar 31, 2026

ESSEX INVESTMENT MANAGEMENT CO LLC holds $11,510,417 across 3 Pollution & Treatment Controls names. ERII ranks #2 (11.6% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	CECO	Ceco Environmental Corp	157,246	$9,368,716
2	ERII	Energy Recovery, Inc. This page	132,322	$1,332,482
3	VLTO	Veralto Corp	9,152	$809,219

25 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$1,332,482	132,322	-2.1%	Shares	Sole	2026-05-11
2025-12-31	$1,822,499	135,100	-2.0%	Shares	Sole	2026-02-13
2025-09-30	$2,126,202	137,886	-5.5%	Shares	Sole	2025-11-06
2025-06-30	$1,864,653	145,904	-18.7%	Shares	Sole	2025-08-12
2025-03-31	$2,853,271	179,564	-18.1%	Shares	Sole	2025-05-07
2024-12-31	$3,224,165	219,331	-7.6%	Shares	Sole	2025-02-07
2024-09-30	$4,128,838	237,426	-3.0%	Shares	Sole	2024-10-10
2024-06-30	$3,251,903	244,688	-4.6%	Shares	Sole	2024-08-12
2024-03-31	$4,048,034	256,367	-16.6%	Shares	Sole	2024-05-03
2023-12-31	$5,794,242	307,550	-18.7%	Shares	Sole	2024-02-08
2023-09-30	$8,022,343	378,234	+30.2%	Shares	Sole	2023-11-09
2023-06-30	$8,120,704	290,544	-36.0%	Shares	Sole	2023-08-14
2023-03-31	$10,464,331	453,984	-1.0%	Shares	Sole	2023-05-04
2022-12-31	$9,395,894	458,560	+0.0%	Shares	Sole	2023-02-03
2022-09-30	$9,968,485	458,532	+4.4%	Shares	Sole	2022-11-14
2022-06-30	$8,533,303	439,408	-2.2%	Shares	Sole	2022-08-12
2022-03-31	$9,045,639	449,138	+14.6%	Shares	Sole	2022-05-09
2021-12-31	$8,419,373	391,781	+2.0%	Shares	Sole	2022-02-10
2021-09-30	$7,308,167	384,034	+35.1%	Shares	Sole	2021-11-09
2021-06-30	$6,475,078	284,244	-24.7%	Shares	Sole	2021-08-12
2021-03-31	$6,921,204	377,383	+4.5%	Shares	Sole	2021-05-12
2020-12-31	$4,923,548	360,964	+147.1%	Shares	Sole	2021-02-12
2020-09-30	$1,198,044	146,103	+3.2%	Shares	Sole	2020-11-12
2020-06-30	$1,075,795	141,552	-72.5%	Shares	Sole	2020-08-04
2020-03-31	$3,825,514	514,182	—	Shares	Sole	2020-05-04
No filing history on record for this holder in this stock.