Position in ERII
as of Jun 30, 2026
· filed Aug 13, 2026
Position Value
$6,108,775
+$5,038,366 QoQ
Shares Held
677,248
+537.1% QoQ
Ownership
1.33%
of shares outstanding
% of Portfolio
0.01%
of 13F equity value
Holder Rank
#17
of 198 holders
Holding Since
Mar 2021
16 quarters on record
Voting authority
Sole 0%
Shared 100%
None 0%
Common Shares in ERII Over Time
Shares Held
Position Value (USD)
Position in Pollution & Treatment Controls
Industrials · as of Jun 30, 2026MARSHALL WACE, LLP holds $16,079,873 across 6 Pollution & Treatment Controls names. ERII ranks #1 (38.0% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | ERII |
Energy Recovery, Inc.
This page
|
677,248 | $6,108,775 | |
| 2 | CECO |
Ceco Environmental Corp
|
57,886 | $5,252,575 | |
| 3 | ARQ |
Arq, Inc.
|
880,201 | $2,244,511 | |
| 4 | ADUR |
Aduro Clean Technologies Inc.
|
76,525 | $1,206,033 | |
| 5 | VLTO |
Veralto Corp
|
11,528 | $1,022,303 | |
| 6 | ZWS |
Zurn Elkay Water Solutions Corp
|
4,862 | $245,676 |
All Filings in ERII
Export CSV
16 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $6,108,775 | 677,248 | Shares | Other | 2026-08-13 | |
| 2026-03-31 | $1,070,409 | 106,297 | Shares | Other | 2026-05-15 | |
| 2025-12-31 | $1,475,670 | 109,390 | Shares | Other | 2026-02-13 | |
| 2025-09-30 | $3,691,377 | 239,389 | Shares | Other | 2025-11-13 | |
| 2025-06-30 | $641,734 | 50,214 | Shares | Other | 2025-08-13 | |
| 2025-03-31 | $751,341 | 47,284 | Shares | Other | 2025-05-15 | |
| 2024-12-31 | $2,611,160 | 177,630 | Shares | Other | 2025-02-13 | |
| 2024-03-31 | $1,938,996 | 122,799 | Shares | Other | 2024-05-15 | |
| 2023-03-31 | $2,810,578 | 121,934 | Shares | Other | 2023-05-15 | |
| 2022-12-31 | $399,186 | 19,482 | Shares | Other | 2023-02-14 | |
| 2022-09-30 | $1,017,432 | 46,800 | Shares | Other | 2022-11-14 | |
| 2022-06-30 | $1,197,107 | 61,643 | Shares | Other | 2022-08-15 | |
| 2022-03-31 | $424,047 | 21,055 | Shares | Other | 2022-05-16 | |
| 2021-09-30 | $2,972,828 | 156,218 | Shares | Sole | 2021-11-15 | |
| 2021-06-30 | $2,361,807 | 103,679 | Shares | Sole | 2021-08-13 | |
| 2021-03-31 | $774,846 | 42,249 | Shares | Sole | 2021-05-17 | |
| No filing history on record for this holder in this stock. | ||||||