Position in ROK
as of Jun 30, 2026
· filed Aug 6, 2026
Position Value
$34,655
+$9,534 QoQ
Shares Held
70
0.0% QoQ
Ownership
0.000%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#1,363
of 1,527 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in ROK Over Time
Shares Held
Position Value (USD)
Position in Specialty Industrial Machinery
Industrials · as of Jun 30, 2026ESSEX INVESTMENT MANAGEMENT CO LLC holds $37,740,140 across 13 Specialty Industrial Machinery names. ROK ranks #10 (0.1% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | GHM |
Graham Corp
|
93,405 | $11,562,604 | |
| 2 | GEV |
GE Vernova Inc.
|
8,283 | $9,731,365 | |
| 3 | AMSC |
American Superconductor Corp /De/
|
221,933 | $9,212,438 | |
| 4 | MIR |
Mirion Technologies, Inc.
|
295,060 | $5,290,425 | |
| 5 | XYL |
Xylem Inc.
|
10,462 | $1,236,713 | |
| 6 | BWEN |
Broadwind, Inc.
|
94,671 | $457,260 | |
| 7 | GTES |
Gates Industrial Corp Ltd.
|
1,996 | $55,828 | |
| 8 | OPTT |
Ocean Power Technologies, Inc.
|
204,864 | $53,264 |
All Filings in ROK
Export CSV
26 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $34,655 | 70 | Shares | Sole | 2026-08-06 | |
| 2026-03-31 | $25,121 | 70 | Shares | Sole | 2026-05-11 | |
| 2025-12-31 | $27,234 | 70 | Shares | Sole | 2026-02-13 | |
| 2025-09-30 | $24,467 | 70 | Shares | Sole | 2025-11-06 | |
| 2025-06-30 | $23,251 | 70 | Shares | Sole | 2025-08-12 | |
| 2025-03-31 | $18,086 | 70 | Shares | Sole | 2025-05-07 | |
| 2024-12-31 | $20,005 | 70 | Shares | Sole | 2025-02-07 | |
| 2024-09-30 | $18,792 | 70 | Shares | Sole | 2024-10-10 | |
| 2024-06-30 | $19,269 | 70 | Shares | Sole | 2024-08-12 | |
| 2024-03-31 | $26,219 | 90 | Shares | Sole | 2024-05-03 | |
| 2023-12-31 | $27,943 | 90 | Shares | Sole | 2024-02-08 | |
| 2023-09-30 | $25,728 | 90 | Shares | Sole | 2023-11-09 | |
| 2023-06-30 | $29,650 | 90 | Shares | Sole | 2023-08-14 | |
| 2023-03-31 | $26,410 | 90 | Shares | Sole | 2023-05-04 | |
| 2022-12-31 | $23,181 | 90 | Shares | Sole | 2023-02-03 | |
| 2022-09-30 | $17,208 | 80 | Shares | Sole | 2022-11-14 | |
| 2022-06-30 | $15,944 | 80 | Shares | Sole | 2022-08-12 | |
| 2022-03-31 | $22,402 | 80 | Shares | Sole | 2022-05-09 | |
| 2021-12-31 | $27,908 | 80 | Shares | Sole | 2022-02-10 | |
| 2021-09-30 | $23,523 | 80 | Shares | Sole | 2021-11-09 | |
| 2021-06-30 | $22,881 | 80 | Shares | Sole | 2021-08-12 | |
| 2021-03-31 | $21,235 | 80 | Shares | Sole | 2021-05-12 | |
| 2020-12-31 | $15,299 | 61 | Shares | Sole | 2021-02-12 | |
| 2020-09-30 | $13,461 | 61 | Shares | Sole | 2020-11-12 | |
| 2020-06-30 | $516,099 | 2,423 | Shares | Sole | 2020-08-04 | |
| 2020-03-31 | $28,974 | 192 | Shares | Sole | 2020-05-04 | |
| No filing history on record for this holder in this stock. | ||||||