D. E. Shaw & Co., Inc.

Position in ERII — Energy Recovery, Inc.

CIK 1009207 New York, NY

Position in ERII

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

Position Value

$139,973

-$711,178 QoQ

Shares Held

13,900

-78.0% QoQ

Ownership

0.027%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2021

17 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Industrials · as of Mar 31, 2026

D. E. Shaw & Co., Inc. holds $21,681,431 across 4 Pollution & Treatment Controls names. ERII ranks #4 (0.6% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	VLTO	Veralto Corp	228,038	$20,163,119
2	ARQ	Arq, Inc.	281,828	$721,478
3	ZWS	Zurn Elkay Water Solutions Corp	14,649	$656,861
4	ERII	Energy Recovery, Inc. This page	13,900	$139,973

17 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$139,973	13,900	-78.0%	Shares	Defined	2026-05-15
2025-12-31	$851,151	63,095	-81.8%	Shares	Defined	2026-02-17
2025-09-30	$5,347,670	346,801	-7.2%	Shares	Defined	2025-11-14
2025-06-30	$4,775,783	373,692	+42.3%	Shares	Defined	2025-08-14
2025-03-31	$4,173,332	262,639	-30.8%	Shares	Defined	2025-05-15
2024-12-31	$5,577,444	379,418	-17.8%	Shares	Defined	2025-02-14
2024-09-30	$8,025,014	461,473	-31.0%	Shares	Defined	2024-11-14
2024-06-30	$8,884,032	668,475	+39.1%	Shares	Defined	2024-08-14
2024-03-31	$7,589,337	480,642	+245.2%	Shares	Defined	2024-05-15
2023-12-31	$2,622,941	139,222	-9.4%	Shares	Defined	2024-02-14
2023-09-30	$3,260,167	153,709	-4.6%	Shares	Defined	2023-11-14
2023-06-30	$4,505,567	161,201	+41.6%	Shares	Defined	2023-08-14
2023-03-31	$2,624,564	113,864	+42.2%	Shares	Defined	2023-05-15
2022-12-31	$1,640,962	80,086	+123.1%	Shares	Defined	2023-02-14
2022-09-30	$780,466	35,900	+127.2%	Shares	Defined	2022-11-14
2022-06-30	$306,836	15,800	-51.5%	Shares	Defined	2022-08-15
2021-03-31	$597,737	32,592	—	Shares	Defined	2021-05-17
No filing history on record for this holder in this stock.