American Superconductor Ownership | Who Owns American Superconductor?
American Superconductor Ownership Summary
American Superconductor is owned by 81.98% institutional investors, 3.83% insiders, and 14.19% retail investors. Blackrock funding, inc. /de is the largest institutional shareholder, holding 9.34% of AMSC shares. Vanguard Total Stock Mkt Idx Inv is the top mutual fund, with 2.88% of its assets in American Superconductor shares.
AMSC Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | American Superconductor | 81.98% | 3.83% | 14.19% |
| Sector | Industrials Stocks | 46.81% | 12.58% | 40.62% |
| Industry | Industrial Machinery Stocks | 54.58% | 8.80% | 36.63% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Blackrock funding, inc. /de | 3.63M | 9.34% | $215.54M |
| Blackrock | 2.54M | 8.53% | $59.50M |
| Vanguard group | 2.95M | 7.59% | $175.19M |
| Baillie gifford | 1.43M | 3.67% | $84.77B |
| Driehaus capital management | 1.22M | 3.14% | $72.39M |
| Goldman sachs group | 1.17M | 3.02% | $69.73M |
| State street | 1.14M | 2.92% | $67.46M |
| Geode capital management | 1.07M | 2.75% | $63.55M |
| Nuveen asset management | 878.62K | 2.38% | $21.64M |
| Nuveen | 826.15K | 2.13% | $49.07M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Awm investment company | 745.47K | 4.15% | $44.27M |
| Andrew hill investment advisors | 88.86K | 4.11% | $5.28M |
| Telemark asset management | 690.00K | 3.89% | $40.98M |
| Heights capital management | 340.10K | 3.33% | $12.48M |
| Palisades investment partners | 141.11K | 3.29% | $8.38M |
| Essex investment management | 245.58K | 2.23% | $14.59M |
| Lisanti capital growth | 118.15K | 1.72% | $7.02M |
| Lumbard & kellner | 72.44K | 1.58% | $4.30M |
| Oberweis asset management inc/ | 665.70K | 1.51% | $39.54M |
| Virtus etf advisers | 25.99K | 1.01% | $1.54M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Blackrock | 2.54M | 0.00% | 1.80M |
| Fuller & thaler asset management | 809.95K | 0.16% | 809.95K |
| Arrowstreet capital, limited partnership | 760.46K | 0.03% | 524.06K |
| Vanguard group | 2.95M | 0.00% | 502.75K |
| Driehaus capital management | 1.22M | 0.52% | 379.10K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Hood river capital management | - | - | -1.17M |
| Awm investment company | 745.47K | 4.15% | -813.01K |
| Royce & associates lp | 357.58K | 0.21% | -454.15K |
| Macquarie group | 465.22K | 0.03% | -356.96K |
| Atreides management, lp | 771.50K | 0.89% | -332.96K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Fuller & thaler asset management | 809.95K | 0.16% | 809.95K | $48.10M |
| Heights capital management | 340.10K | 3.33% | 340.10K | $12.48M |
| Renaissance | 323.99K | 0.03% | 323.99K | $19.24M |
| Axiom investors llc /de | 264.66K | 0.12% | 264.66K | $15.72M |
| Voloridge investment management | 171.61K | 0.03% | 171.61K | $10.19M |
Sold Out
| Holder | Change |
|---|---|
| Wealthtrak capital management | -5.00 |
| Us bancorp \de\ | -8.00 |
| Stephens consulting | -20.00 |
| Hantz financial services | -20.00 |
| North star investment management | -21.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| 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% |
| Dec 31, 2024 | 206 | 9.57% | 25,842,142 | -4.65% | 68 | 1.28% | 116 | 17.17% | 50 | -3.85% |
| Sep 30, 2024 | 187 | 9.36% | 27,101,669 | 0.11% | 73 | 1.27% | 98 | 1.03% | 53 | 29.27% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| Vanguard Total Stock Mkt Idx Inv | 1.30M | 2.88% | -29.07K |
| Vanguard US Total Market Shares ETF | 1.11M | 2.82% | - |
| iShares Russell 2000 ETF | 923.17K | 2.04% | - |
| 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 | 634.40K | 1.40% | - |
| Oberweis Micro-Cap | 634.40K | 1.40% | - |
| Edinburgh Worldwide Ord | 607.40K | 1.34% | -53.70K |
| AZ InvestEd Ivy Small Cap Growth E | 529.30K | 1.17% | -127.49K |
| CREF Stock R3 | 471.44K | 1.04% | 27.20K |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| 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 |
| Aug 04, 2025 | McGahn Daniel P | Chairman, President and CEO | Sell | $1.53M |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2025 Q3 | - | 6 |
| 2025 Q2 | - | 12 |
| 2024 Q4 | - | 1 |
| 2024 Q3 | - | - |
| 2024 Q2 | - | 6 |
AMSC Ownership FAQ
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