American Superconductor Corp
AMSC- Exchange
- Nasdaq
- Industry
- Motors & Generators
- SEC CIK
- 0000880807
No open-market purchases or sales by American Superconductor Corp insiders were filed in the last 90 days; 277 institutions reported holding it in 13F filings for Q2 2026, worth $1.47B in total; no superinvestor holds it.
13F holders, Q2 2025
Institutional positions in American Superconductor Corp as of Jun 30, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 232
- +44 vs. Q1 2025
- Shares held
- 32.7M
- +5.17M (+18.8%) vs. Q1 2025
- Total value
- $1.20B
- +$701.0M (+140.3%) vs. Q1 2025
- New holders
- 70
- 95 more added
- Sold out
- 26
- 47 more reduced
1 institution that held it in Q1 2025 haven't filed for Q2 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting AMSC on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 277 | $1.47B |
| Q1 2026 | 245 | $1.12B |
| Q4 2025 | 240 | $953.2M |
| Q3 2025 | 273 | $1.94B |
| Q2 2025 | 232 | $1.20B |
| Q1 2025 | 189 | $499.8M |
| Q4 2024 | 191 | $678.1M |
| Q3 2024 | 171 | $642.6M |
| Q2 2024 | 155 | $636.1M |
| Q1 2024 | 128 | $312.0M |
| Q4 2023 | 99 | $178.8M |
| Q3 2023 | 72 | $100.0M |
| Q2 2023 | 77 | $81.9M |
| Q1 2023 | 74 | $64.6M |
| Q4 2022 | 77 | $48.4M |
| Q3 2022 | 82 | $61.0M |
| Q2 2022 | 93 | $68.6M |
| Q1 2022 | 107 | $119.5M |
| Q4 2021 | 107 | $178.2M |
| Q3 2021 | 101 | $243.3M |
| Q2 2021 | 105 | $284.8M |
| Q1 2021 | 104 | $311.2M |
Institutions, Q2 2025
Shares, value and share of portfolio for each institution holding American Superconductor Corp; share changes are against Q1 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Hillsdale Investment Management Inc. | 220,000 | $8.07M | 0.30% | +29,600+15.5% | Added |
| Wells Fargo & Company | 220,796 | $8.10M | 0.00% | +173,854+370.4% | Added |
| Arrowstreet Capital, Limited Partnership | 236,396 | $8.67M | 0.01% | +236,396 | New |
| Millennium Management LLC | 251,807 | $9.24M | 0.01% | +26,125+11.6% | Added |
| Tudor Investment Corp Et Al | 260,121 | $9.54M | 0.07% | +240,007+1,193.2% | Added |
| Allspring Global Investments Holdings, LLC | 273,396 | $9.84M | 0.02% | −67,634−19.8% | Reduced |
| Charles Schwab Investment Management Inc | 322,958 | $11.8M | 0.00% | +13,277+4.3% | Added |
| First Trust Advisors LP | 337,574 | $12.4M | 0.01% | +7,022+2.1% | Added |
| Heights Capital Management, Inc | 340,102 | $12.5M | 3.90% | +340,102 | New |
| Northern Trust Corp | 341,549 | $12.5M | 0.00% | +11,036+3.3% | Added |
| Essex Investment Management Co LLC | 346,042 | $12.7M | 2.31% | −26,179−7.0% | Reduced |
| Legal & General Group Plc | 417,039 | $15.3M | 0.00% | +52,509+14.4% | Added |
| Wellington Management Group LLP | 431,589 | $15.8M | 0.00% | +142,416+49.2% | Added |
| Dimensional Fund Advisors LP | 480,753 | $17.6M | 0.00% | −187,399−28.0% | Reduced |
| Emerald Advisers, LLC | 500,054 | $18.3M | 0.67% | +461,335+1,191.5% | Added |
| Morgan Stanley | 570,356 | $20.9M | 0.00% | +60,459+11.9% | Added |
| Oberweis Asset Management Inc | 668,200 | $24.5M | 1.07% | 00.0% | Unchanged |
| Citadel Advisors LLC | 689,691 | $25.3M | 0.02% | +558,130+424.2% | Added |
| Telemark Asset Management, LLC | 690,000 | $25.3M | 2.69% | +90,000+15.0% | Added |
| Royce & Associates LP | 811,732 | $29.8M | 0.31% | −55,610−6.4% | Reduced |
| Macquarie Group Ltd | 822,179 | $30.2M | 0.04% | −204,643−19.9% | Reduced |
| Driehaus Capital Management LLC | 839,847 | $30.8M | 0.25% | +40.0% | Added |
| Geode Capital Management, LLC | 940,111 | $34.5M | 0.00% | +58,430+6.6% | Added |
| Nuveen, LLC | 997,902 | $36.6M | 0.01% | +219,336+28.2% | Added |
| State Street Corp | 1,020,165 | $37.4M | 0.00% | +130,118+14.6% | Added |
| Goldman Sachs Group Inc | 1,029,047 | $37.8M | 0.01% | +547,086+113.5% | Added |
| Atreides Management, LP | 1,104,458 | $40.5M | 1.12% | +280,418+34.0% | Added |
| Hood River Capital Management LLC | 1,168,906 | $42.9M | 0.60% | −70,190−5.7% | Reduced |
| Baillie Gifford & Co | 1,452,679 | $53.3M | 0.04% | −66,211−4.4% | Reduced |
| AWM Investment Company, Inc. | 1,558,478 | $57.2M | 6.41% | 00.0% | Unchanged |
| Vanguard Group Inc | 2,447,047 | $89.8M | 0.00% | +159,462+7.0% | Added |
| BlackRock, Inc. | 3,420,039 | $125.5M | 0.00% | +161,616+5.0% | Added |
| Twinbeech Capital LP | 0 | $0 | 0.00% | −115,458−100.0% | Sold out |
| Connor, Clark & Lunn Investment Management Ltd. | 0 | $0 | 0.00% | −108,571−100.0% | Sold out |
| Ameriprise Financial Inc | 0 | $0 | 0.00% | −68,268−100.0% | Sold out |
| Range Financial Group LLC | 0 | $0 | 0.00% | −44,925−100.0% | Sold out |
| CWM Advisors, LLC | 0 | $0 | 0.00% | −38,556−100.0% | Sold out |
| Engineers Gate Manager LP | 0 | $0 | 0.00% | −29,137−100.0% | Sold out |
| Hussman Strategic Advisors, Inc. | 0 | $0 | 0.00% | −21,000−100.0% | Sold out |
| MetLife Investment Management | 0 | $0 | 0.00% | −20,808−100.0% | Sold out |
| PFG Investments, LLC | 0 | $0 | 0.00% | −18,900−100.0% | Sold out |
| Journey Strategic Wealth LLC | 0 | $0 | 0.00% | −17,542−100.0% | Sold out |
| Corebridge Financial, Inc. | 0 | $0 | 0.00% | −17,123−100.0% | Sold out |
| Massar Capital Management, LP | 0 | $0 | 0.00% | −13,397−100.0% | Sold out |
| Ieq Capital, LLC | 0 | $0 | 0.00% | −13,006−100.0% | Sold out |
| Wolverine Trading, LLC | 0 | $0 | 0.00% | −11,748−100.0% | Sold out |
| Clear Street Markets LLC | 0 | $0 | 0.00% | −1,280−100.0% | Sold out |
| South State Corp. | 0 | $0 | 0.00% | −765−100.0% | Sold out |
| Loring Wolcott & Coolidge Fiduciary Advisors LLP | 0 | $0 | 0.00% | −633−100.0% | Sold out |
| Stonebridge Financial Group, LLC | 0 | $0 | 0.00% | −319−100.0% | Sold out |
| Capital Advisors, Ltd. LLC | 0 | $0 | 0.00% | −292−100.0% | Sold out |
| Boston Private Wealth LLC | 0 | $0 | 0.00% | −158−100.0% | Sold out |
| Quest Partners LLC | 0 | $0 | 0.00% | −106−100.0% | Sold out |
| CoreCap Advisors, LLC | 0 | $0 | 0.00% | −65−100.0% | Sold out |
| Parkside Financial Bank & Trust | 0 | $0 | 0.00% | −40−100.0% | Sold out |
| Hexagon Capital Partners LLC | 0 | $0 | 0.00% | −30−100.0% | Sold out |
| Rialto Wealth Management, LLC | 0 | $0 | 0.00% | −25−100.0% | Sold out |
| Stephens Consulting, LLC | 0 | $0 | 0.00% | −20−100.0% | Sold out |
| Lindbrook Capital, LLC | – | – | – | – | Not filed |