ARDSLEY ADVISORY PARTNERS LP
Position in AMSC — American Superconductor Corp /De/
CIK 900529
Norwalk, CT
Position in AMSC
as of Jun 30, 2026
· filed Jul 13, 2026
Position Value
$830,200
-$16,050 QoQ
Shares Held
20,000
-20.0% QoQ
Ownership
0.041%
of shares outstanding
% of Portfolio
0.09%
of 13F equity value
Holder Rank
#110
of 276 holders
Holding Since
Mar 2022
7 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in AMSC Over Time
Shares Held
Position Value (USD)
Position in Specialty Industrial Machinery
Industrials · as of Jun 30, 2026ARDSLEY ADVISORY PARTNERS LP holds $11,107,050 across 3 Specialty Industrial Machinery names. AMSC ranks #3 (7.5% of the industry book) .
All Filings in AMSC
Export CSV
7 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $830,200 | 20,000 | Shares | Sole | 2026-07-13 | |
| 2026-03-31 | $846,250 | 25,000 | Shares | Sole | 2026-05-15 | |
| 2024-12-31 | $2,463,000 | 100,000 | Shares | Sole | 2025-02-14 | |
| 2024-09-30 | $2,360,000 | 100,000 | Shares | Sole | 2024-11-14 | |
| 2024-06-30 | $935,600 | 40,000 | Shares | Sole | 2024-08-14 | |
| 2024-03-31 | $1,013,250 | 75,000 | Shares | Sole | 2024-05-15 | |
| 2022-03-31 | $190,250 | 25,000 | Shares | Sole | 2022-05-16 | |
| No filing history on record for this holder in this stock. | ||||||