Vanguard Capital Management 13D and 13G filings for American Superconductor Corporation:
- Schedule 13D must be filed within ten days after a person or an organization acquires beneficial ownership of more than 5% of a voting class of a company's equity securities.
- Shares have been adjusted for stock splits.
| Reported DateTime | Transaction Date | Type | Company Symbol | Filed By Symbol | Shares Owned % Owned | Shares Vs. Prev Report | View |
| 2026-07-31 09:56 am Purchase | 2026-06-30 | 13G | AMERICAN SUPERCONDUCTOR CORP S AMSC | Vanguard Capital Management | 2,390,425 4.930% | 5,689 (+0.24%) | Filing |
| 2026-04-29 4:34 pm Purchase | 2026-03-31 | 13G | AMERICAN SUPERCONDUCTOR CORP S AMSC | Vanguard Capital Management | 2,384,736 5.000% | 2,384,736 (New Position) | Filing |