Position in ERII
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$196,437
+$155,845 QoQ
Shares Held
21,778
+440.3% QoQ
Ownership
0.043%
of shares outstanding
% of Portfolio
0.01%
of 13F equity value
Holder Rank
#112
of 198 holders
Holding Since
Mar 2020
8 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in ERII Over Time
Shares Held
Position Value (USD)
Position in Pollution & Treatment Controls
Industrials · as of Jun 30, 2026GROUP ONE TRADING LLC holds $345,459 across 8 Pollution & Treatment Controls names. ERII ranks #1 (56.9% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | ERII |
Energy Recovery, Inc.
This page
|
21,778 | $196,437 | |
| 2 | ADUR |
Aduro Clean Technologies Inc.
|
3,506 | $55,254 | |
| 3 | VLTO |
Veralto Corp
|
400 | $35,472 | |
| 4 | FTEK |
Fuel Tech, Inc.
|
13,903 | $30,725 | |
| 5 | ARQ |
Arq, Inc.
|
6,617 | $16,873 | |
| 6 | ZWS |
Zurn Elkay Water Solutions Corp
|
211 | $10,661 | |
| 7 | CLIR |
ClearSign Technologies Corp
|
9 | $33 | |
| 8 | LIQT |
Liqtech International Inc
|
5 | $4 |
All Filings in ERII
Export CSV
8 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $196,437 | 21,778 | Shares | Sole | 2026-08-14 | |
| 2026-03-31 | $40,592 | 4,031 | Shares | Sole | 2026-05-13 | |
| 2025-03-31 | $22,516 | 1,417 | Shares | Sole | 2025-05-14 | |
| 2024-12-31 | $18,963 | 1,290 | Shares | Sole | 2025-05-14 | |
| 2022-09-30 | $116,874 | 5,376 | Shares | Sole | 2022-11-09 | |
| 2021-03-31 | $732,096 | 39,918 | Shares | Sole | 2021-05-12 | |
| 2020-06-30 | $28,150 | 3,704 | Shares | Sole | 2020-08-13 | |
| 2020-03-31 | $86,556 | 11,634 | Shares | Sole | 2020-05-13 | |
| No filing history on record for this holder in this stock. | ||||||