OBERWEIS ASSET MANAGEMENT INC/
Position in AMSC — American Superconductor Corp /De/
CIK 937886
LISLE, IL
Position in AMSC
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$40,991,125
+$12,222,010 QoQ
Shares Held
987,500
+16.2% QoQ
Ownership
2.04%
of shares outstanding
% of Portfolio
0.85%
of 13F equity value
Holder Rank
#10
of 278 holders
Holding Since
Dec 2023
11 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, 2026OBERWEIS ASSET MANAGEMENT INC/ holds $79,708,797 across 4 Specialty Industrial Machinery names. AMSC ranks #1 (51.4% of the industry book) .
All Filings in AMSC
Export CSV
11 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $40,991,125 | 987,500 | Shares | Sole | 2026-08-14 | |
| 2026-03-31 | $28,769,115 | 849,900 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $24,057,202 | 835,900 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $39,535,923 | 665,700 | Shares | Sole | 2025-11-17 | |
| 2025-06-30 | $24,516,258 | 668,200 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $12,121,148 | 668,200 | Shares | Sole | 2025-05-15 | |
| 2024-12-31 | $16,364,172 | 664,400 | Shares | Sole | 2025-02-14 | |
| 2024-09-30 | $15,679,840 | 664,400 | Shares | Sole | 2024-11-14 | |
| 2024-06-30 | $15,540,316 | 664,400 | Shares | Sole | 2024-08-14 | |
| 2024-03-31 | $8,570,744 | 634,400 | Shares | Sole | 2024-05-15 | |
| 2023-12-31 | $4,186,412 | 375,800 | Shares | Sole | 2024-02-14 | |
| No filing history on record for this holder in this stock. | ||||||