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CITADEL ADVISORS LLC

Position in ERII — Energy Recovery, Inc.

CIK 1423053 MIAMI, FL

Position in ERII

as of Mar 31, 2026 · filed May 15, 2026
Position Value
$4,525,820
-$1,120,917 QoQ
Shares Held
449,436
+7.4% QoQ
Ownership
0.872%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
not a current holder
Holding Since
Mar 2020
24 quarters on record
Voting authority Sole 100.ToString("F0")% Shared 0.ToString("F0")% None 0.ToString("F0")%

Common Shares in ERII Over Time

Shares Held

Position Value (USD)

Derivatives in ERII

reported options exposure · as of Mar 31, 2026
CallValue
$335,331
CallShares
33,300
PutValue
$0
PutShares
0

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 Mar 31, 2026

CITADEL ADVISORS LLC holds $43,243,660 across 7 Pollution & Treatment Controls names. ERII ranks #4 (10.5% of the industry book) .

# Ticker Company Shares Value (USD) Open
4 ERII
Energy Recovery, Inc.
This page
449,436 $4,525,820

All Filings in ERII

Export CSV
50 filing rows on record
Report Date Value (USD) Shares
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
2021-09-30 $416,985 21,912
2021-09-30 $1,136,091 59,700
2021-09-30 $679,371 35,700