CenterBook Partners LP

Position in ERII — Energy Recovery, Inc.

CIK 1872738 GREENWICH, CT

Position in ERII

as of Jun 30, 2026 · filed Aug 11, 2026 Compact

Position Value

$3,792,973

+$1,055,585 QoQ

Shares Held

420,507

+54.7% QoQ

Ownership

0.824%

of shares outstanding

% of Portfolio

0.19%

of 13F equity value

Holder Rank

#28

of 198 holders

Holding Since

Mar 2026

2 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Industrials · as of Jun 30, 2026

CenterBook Partners LP holds $6,762,286 across 3 Pollution & Treatment Controls names. ERII ranks #1 (56.1% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ERII	Energy Recovery, Inc. This page	420,507	$3,792,973
2	CECO	Ceco Environmental Corp	16,809	$1,525,248
3	VLTO	Veralto Corp	16,284	$1,444,065

2 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$3,792,973	420,507	+54.7%	Shares	Sole	2026-08-11
2026-03-31	$2,737,388	271,836	—	Shares	Sole	2026-05-05
No filing history on record for this holder in this stock.