American Superconductor Ownership | Who Owns American Superconductor?
American Superconductor Ownership Summary
American Superconductor is owned by 46.92% institutional investors, 3.68% insiders, and 49.40% retail investors. Blackrock funding, inc. /de is the largest institutional shareholder, holding 9.06% of AMSC shares. Vanguard Total Stock Mkt Idx Inv is the top mutual fund, with 3.07% of its assets in American Superconductor shares.
AMSC Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | American Superconductor | 46.92% | 3.68% | 49.40% |
| Sector | Industrials Stocks | 49.61% | 15.69% | 34.70% |
| Industry | Industrial Machinery Stocks | 46.01% | 10.90% | 43.09% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Blackrock funding, inc. /de | 3.98M | 9.06% | $134.81M |
| Blackrock | 2.54M | 8.53% | $59.50M |
| Vanguard group | 3.53M | 8.02% | $101.50M |
| Baillie gifford | 1.45M | 3.29% | $49.00M |
| State street | 1.26M | 2.87% | $42.69M |
| Geode capital management | 1.17M | 2.66% | $39.58M |
| Barrow hanley mewhinney & strauss | 1.14M | 2.59% | $38.58M |
| Nuveen asset management | 878.62K | 2.38% | $21.64M |
| Nuveen | 1.02M | 2.32% | $34.56M |
| Atreides management, lp | 771.50K | 1.98% | $45.82M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Heights capital management | 340.10K | 3.33% | $12.48M |
| Awm investment company | 801.60K | 3.00% | $27.13M |
| Palisades investment partners | 152.58K | 2.02% | $5.16M |
| Telemark asset management | 600.00K | 1.88% | $20.31M |
| Essex investment management | 227.56K | 1.22% | $7.70M |
| Crawford fund management | 160.00K | 0.94% | $3.74M |
| Atreides management, lp | 771.50K | 0.89% | $45.82M |
| Lumbard & kellner | 73.67K | 0.86% | $2.49M |
| Oberweis asset management inc/ | 849.90K | 0.85% | $28.77M |
| Emerald advisers | 757.40K | 0.81% | $25.64M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Blackrock | 2.54M | 0.00% | 1.80M |
| Barrow hanley mewhinney & strauss | 1.14M | 0.13% | 1.14M |
| Vanguard group | 3.53M | 0.00% | 576.83K |
| Hood river capital management | 398.71K | 0.14% | 398.71K |
| Bnp paribas arbitrage, snc | 436.69K | 0.01% | 354.19K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Fuller & thaler asset management | - | - | -809.95K |
| Driehaus capital management | - | - | -499.98K |
| Macquarie group | - | - | -465.22K |
| Atreides management, lp | 771.50K | 0.89% | -332.96K |
| Qube research | 329.41K | 0.01% | -269.59K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Barrow hanley mewhinney & strauss | 1.14M | 0.13% | 1.14M | $38.58M |
| Hood river capital management | 398.71K | 0.14% | 398.71K | $13.50M |
| Heights capital management | 340.10K | 3.33% | 340.10K | $12.48M |
| Vanguard fiduciary trust | 326.04K | 0.00% | 326.04K | $11.04M |
| Portolan capital management | 295.64K | 0.53% | 295.64K | $10.01M |
Sold Out
| Holder | Change |
|---|---|
| Turning point benefit group | -2.00 |
| Tortoise investment management | -2.00 |
| Wealthtrak capital management | -5.00 |
| Stephens consulting | -20.00 |
| Hantz financial services | -20.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Mar 31, 2026 | 148 | -41.96% | 20,626,455 | -37.63% | 46 | 0.83% | 87 | -40.00% | 36 | -46.27% |
| Dec 31, 2025 | 165 | -44.26% | 22,561,639 | -31.00% | 51 | 0.73% | 90 | -47.06% | 46 | -42.50% |
| Sep 30, 2025 | 283 | 19.41% | 31,868,869 | 6.18% | 81 | 1.38% | 161 | 3.21% | 76 | 49.02% |
| Jun 30, 2025 | 247 | 18.75% | 32,547,640 | 18.09% | 83 | 1.56% | 159 | 57.43% | 54 | -19.40% |
| Mar 31, 2025 | 206 | -1.90% | 27,597,658 | 0.35% | 73 | 1.37% | 100 | -16.67% | 67 | 34.00% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| Vanguard Total Stock Mkt Idx Inv | 1.46M | 3.07% | 1.74K |
| Vanguard US Total Market Shares ETF | 1.11M | 2.82% | - |
| iShares Russell 2000 ETF | 1.09M | 2.28% | 9.16K |
| Delaware Ivy Small Cap Growth C | 681.45K | 1.73% | 557.59K |
| Hood River Small-Cap Growth Instl | 756.13K | 1.67% | -59.08K |
| Oberweis Micro-Cap Growth | 785.20K | 1.65% | - |
| Oberweis Micro-Cap | 785.20K | 1.65% | 150.80K |
| Edinburgh Worldwide Ord | 607.40K | 1.28% | - |
| Vanguard Institutional Extnd Mkt Idx Tr | 536.67K | 1.13% | 5.01K |
| American Beacon Small Cp Val R5 | 504.95K | 1.06% | 186.92K |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Feb 24, 2026 | OLIVER DAVID R JR | - | Sell | $6.82K |
| Jun 18, 2019 | OLIVER DAVID R JR | - | Buy | $1.67K |
| Aug 08, 2025 | House Arthur H | - | Sell | $494.08K |
| Aug 04, 2022 | Klein Margaret D. | - | Buy | $2.78K |
| Aug 04, 2025 | McGahn Daniel P | Chairman, President and CEO | Sell | $3.97M |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2026 Q1 | - | 1 |
| 2025 Q3 | - | 6 |
| 2025 Q2 | - | 12 |
| 2024 Q4 | - | 1 |
| 2024 Q3 | - | - |
AMSC Ownership FAQ
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