ESSEX INVESTMENT MANAGEMENT CO LLC
Position in WAB — Westinghouse Air Brake Technologies Corp
CIK 201772
BOSTON, MA
Position in WAB
as of Jun 30, 2026
· filed Aug 6, 2026
Position Value
$82,497
+$6,025 QoQ
Shares Held
306
0.0% QoQ
Ownership
0.000%
of shares outstanding
% of Portfolio
0.01%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
26 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in WAB Over Time
Shares Held
Position Value (USD)
Position in Railroads
Industrials · as of Jun 30, 2026ESSEX INVESTMENT MANAGEMENT CO LLC holds $3,380,844 across 3 Railroads names. WAB ranks #2 (2.4% of the industry book) .
All Filings in WAB
Export CSV
26 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $82,497 | 306 | Shares | Sole | 2026-08-06 | |
| 2026-03-31 | $76,472 | 306 | Shares | Sole | 2026-05-11 | |
| 2025-12-31 | $77,268 | 362 | Shares | Sole | 2026-02-13 | |
| 2025-09-30 | $72,570 | 362 | Shares | Sole | 2025-11-06 | |
| 2025-06-30 | $75,784 | 362 | Shares | Sole | 2025-08-12 | |
| 2025-03-31 | $65,648 | 362 | Shares | Sole | 2025-05-07 | |
| 2024-12-31 | $68,631 | 362 | Shares | Sole | 2025-02-07 | |
| 2024-09-30 | $156,140 | 859 | Shares | Sole | 2024-10-10 | |
| 2024-06-30 | $169,745 | 1,074 | Shares | Sole | 2024-08-12 | |
| 2024-03-31 | $178,312 | 1,224 | Shares | Sole | 2024-05-03 | |
| 2023-12-31 | $217,760 | 1,716 | Shares | Sole | 2024-02-08 | |
| 2023-09-30 | $222,423 | 2,093 | Shares | Sole | 2023-11-09 | |
| 2023-06-30 | $231,623 | 2,112 | Shares | Sole | 2023-08-14 | |
| 2023-03-31 | $213,438 | 2,112 | Shares | Sole | 2023-05-04 | |
| 2022-12-31 | $213,293 | 2,137 | Shares | Sole | 2023-02-03 | |
| 2022-09-30 | $173,844 | 2,137 | Shares | Sole | 2022-11-14 | |
| 2022-06-30 | $175,404 | 2,137 | Shares | Sole | 2022-08-12 | |
| 2022-03-31 | $364,388 | 3,789 | Shares | Sole | 2022-05-09 | |
| 2021-12-31 | $349,004 | 3,789 | Shares | Sole | 2022-02-10 | |
| 2021-09-30 | $328,632 | 3,812 | Shares | Sole | 2021-11-09 | |
| 2021-06-30 | $313,727 | 3,812 | Shares | Sole | 2021-08-12 | |
| 2021-03-31 | $310,465 | 3,922 | Shares | Sole | 2021-05-12 | |
| 2020-12-31 | $287,090 | 3,922 | Shares | Sole | 2021-02-12 | |
| 2020-09-30 | $242,693 | 3,922 | Shares | Sole | 2020-11-12 | |
| 2020-06-30 | $225,847 | 3,923 | Shares | Sole | 2020-08-04 | |
| 2020-03-31 | $238,821 | 4,962 | Shares | Sole | 2020-05-04 | |
| No filing history on record for this holder in this stock. | ||||||