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Equibles

CITADEL ADVISORS LLC

Position in ERII — Energy Recovery, Inc.

CIK 1423053 MIAMI, FL
Back to ERII Full portfolio

Position in ERII

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$4,295,648
-$230,172 QoQ
Shares Held
476,236
+6.0% QoQ
Ownership
0.933%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#23
of 198 holders
Holding Since
Mar 2020
25 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in ERII Over Time

Shares Held

Position Value (USD)

Derivatives in ERII

reported options exposure · as of Jun 30, 2026
CallValue
$216,480
CallShares
24,000
PutValue
$1,217,700
PutShares
135,000

Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.

Position in Pollution & Treatment Controls

Industrials · as of Jun 30, 2026

CITADEL ADVISORS LLC holds $144,420,153 across 12 Pollution & Treatment Controls names. ERII ranks #3 (3.0% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 VLTO
Veralto Corp
 1,350,356 $119,749,569
2 CECO
Ceco Environmental Corp
 160,872 $14,597,524
3 ERII
Energy Recovery, Inc.
This page 		476,236 $4,295,648
4 ZWS
Zurn Elkay Water Solutions Corp
 58,711 $2,966,666
5 PCT
PureCycle Technologies, Inc.
 233,963 $1,897,439
6 ARQ
Arq, Inc.
 163,201 $416,161
7 ZONE
CleanCore Solutions, Inc.
 216,509 $177,536
8 TOMZ
TOMI Environmental Solutions, Inc.
 36,250 $89,175

All Filings in ERII

Export CSV
50 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $4,295,648 476,236
2026-06-30 $1,217,700 135,000
2026-06-30 $216,480 24,000
2026-03-31 $335,331 33,300
2026-03-31 $4,525,820 449,436
2025-12-31 $5,646,737 418,587
2025-12-31 $694,735 51,500
2025-09-30 $416,340 27,000
2025-09-30 $686,190 44,500
2025-09-30 $5,116,664 331,820
2025-06-30 $486,649 38,079
2025-06-30 $343,782 26,900
2025-06-30 $235,152 18,400
2025-03-31 $4,481,138 282,010
2025-03-31 $707,105 44,500
2025-03-31 $506,891 31,900
2024-12-31 $183,750 12,500
2024-12-31 $254,310 17,300
2024-12-31 $703,879 47,883
2024-09-30 $1,955,192 112,432
2024-09-30 $85,211 4,900
2024-09-30 $386,058 22,200
2024-06-30 $188,718 14,200
2024-06-30 $81,069 6,100
2024-06-30 $2,563,587 192,896
2024-03-31 $155,925 9,875
2024-03-31 $126,320 8,000
2024-03-31 $186,322 11,800
2023-12-31 $531,288 28,200
2023-12-31 $658,833 34,970
2023-12-31 $175,212 9,300
2023-09-30 $161,196 7,600
2023-09-30 $258,762 12,200
2023-09-30 $631,061 29,753
2023-06-30 $80,999 2,898
2023-06-30 $100,620 3,600
2023-06-30 $455,585 16,300
2023-03-31 $18,578 806
2023-03-31 $82,980 3,600
2023-03-31 $140,605 6,100
2022-12-31 $63,519 3,100
2022-12-31 $140,581 6,861
2022-12-31 $145,479 7,100
2022-09-30 $2,237,915 102,940
2022-09-30 $402,190 18,500
2022-06-30 $246,226 12,679
2022-03-31 $444,005 22,046
2021-12-31 $349,341 16,256
2021-12-31 $1,048,712 48,800
2021-12-31 $909,027 42,300

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