American Superconductor Corporation (AMSC)
Industrials
Specialty Industrial Machinery
29.40 $
-0.3%
vs. previous close
Closing price · As of: 31. Jul 2026
Who owns American Superconductor Corporation (AMSC)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 95.0% of the shares are freely tradable; institutional investors hold 69.8%.
Ownership Structure
Institutional ownership
Share of the stock held by institutional investors (funds, banks, insurers) according to regulatory filings.
69.8%
Insiders
Share of the stock held by the executives, founders and major shareholders of the company itself.
3.4%
Float
Share of stock freely tradable on the market — not locked up in the hands of founders, insiders, or major shareholders.
95.0%
Short % of float
Shares sold short as a percentage of the freely tradable float — high values signal many bets on falling prices.
7.4%
Shares Outstanding
Total number of shares issued. Price times share count gives market cap.
49Mio.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 8.35 | 3,982,650 | +6.2 | 03/31/2026 |
| Vanguard Group Inc | 7.39 | 3,526,632 | +19.6 | 12/31/2025 |
| Vanguard Capital Management, LLC | 4.28 | 2,039,468 | +0.0 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 3.59 | 1,711,677 | +0.0 | 03/31/2026 |
| Baillie Gifford & Co Limited. | 3.03 | 1,447,419 | -3.9 | 03/31/2026 |
| State Street Corp | 2.64 | 1,261,071 | +5.8 | 03/31/2026 |
| Geode Capital Management, LLC | 2.45 | 1,169,152 | +7.2 | 03/31/2026 |
| Barrow Hanley Mewhinney & Strauss LLC | 2.39 | 1,139,793 | +0.0 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard Total Stock Mkt Idx Inv | 3.07 | 1,464,032 | +0.1 | 04/30/2026 |
| iShares Russell 2000 ETF | 2.31 | 1,102,067 | +0.9 | 05/29/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Data as of: July 31, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.