Position in CECO
as of Mar 31, 2026
· filed May 13, 2026
Position Value
$21,508
-$177,493 QoQ
Shares Held
361
-89.1% QoQ
Ownership
0.001%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
13 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in CECO Over Time
Shares Held
Position Value (USD)
Position in Pollution & Treatment Controls
Industrials · as of Mar 31, 2026GROUP ONE TRADING LLC holds $150,531 across 7 Pollution & Treatment Controls names. CECO ranks #4 (14.3% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | FTEK |
Fuel Tech, Inc.
|
40,215 | $49,062 | |
| 2 | ERII |
Energy Recovery, Inc.
|
4,031 | $40,592 | |
| 3 | ADUR |
Aduro Clean Technologies Inc.
|
2,432 | $25,511 | |
| 4 | CECO |
Ceco Environmental Corp
This page
|
361 | $21,508 | |
| 5 | ZWS |
Zurn Elkay Water Solutions Corp
|
308 | $13,810 | |
| 6 | CLIR |
ClearSign Technologies Corp
|
9 | $39 | |
| 7 | LIQT |
Liqtech International Inc
|
5 | $9 |
All Filings in CECO
Export CSV
13 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $21,508 | 361 | Shares | Sole | 2026-05-13 | |
| 2025-12-31 | $199,001 | 3,325 | Shares | Sole | 2026-02-12 | |
| 2025-09-30 | $33,843 | 661 | Shares | Sole | 2025-11-12 | |
| 2024-09-30 | $23,293 | 826 | Shares | Sole | 2024-11-14 | |
| 2023-06-30 | $4,836 | 362 | Shares | Sole | 2023-08-09 | |
| 2023-03-31 | $20,649 | 1,476 | Shares | Sole | 2023-05-12 | |
| 2022-12-31 | $373 | 32 | Shares | Sole | 2023-02-09 | |
| 2022-03-31 | $5 | 1 | Shares | Sole | 2022-05-12 | |
| 2021-12-31 | $6 | 1 | Shares | Sole | 2022-02-11 | |
| 2021-06-30 | $32,441 | 4,531 | Shares | Sole | 2021-08-10 | |
| 2021-03-31 | $1,831 | 231 | Shares | Sole | 2021-05-12 | |
| 2020-06-30 | $586 | 89 | Shares | Sole | 2020-08-13 | |
| 2020-03-31 | $415 | 89 | Shares | Sole | 2020-05-13 | |
| No filing history on record for this holder in this stock. | ||||||