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, Q4 2025
Institutional positions in American Superconductor Corp as of Dec 31, 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
- 240
- −29 vs. Q3 2025
- Shares held
- 33.1M
- +460.5K (+1.4%) vs. Q3 2025
- Total value
- $953.2M
- −$982.6M (−50.8%) vs. Q3 2025
- New holders
- 41
- 106 more added
- Sold out
- 70
- 64 more reduced
4 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 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, Q4 2025
Shares, value and share of portfolio for each institution holding American Superconductor Corp; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| AQR Capital Management LLC | 145,965 | $4.20M | 0.00% | −22,786−13.5% | Reduced |
| Balyasny Asset Management LLC | 152,795 | $4.40M | 0.01% | +152,795 | New |
| Bank of America Corp | 165,568 | $4.77M | 0.00% | −32,462−16.4% | Reduced |
| Stephens Investment Management Group LLC | 174,228 | $5.01M | 0.07% | +106,317+156.6% | Added |
| Essex Investment Management Co LLC | 215,154 | $6.19M | 0.94% | −30,427−12.4% | Reduced |
| Allspring Global Investments Holdings, LLC | 204,678 | $6.46M | 0.01% | +5,107+2.6% | Added |
| Jane Street Group, LLC | 242,767 | $6.99M | 0.01% | +106,665+78.4% | Added |
| Tudor Investment Corp Et Al | 251,642 | $7.24M | 0.04% | +76,603+43.8% | Added |
| Panagora Asset Management Inc | 254,785 | $7.33M | 0.03% | +52,191+25.8% | Added |
| Price T Rowe Associates Inc | 274,844 | $7.91M | 0.00% | −121,488−30.7% | Reduced |
| Legal & General Group Plc | 278,026 | $8.00M | 0.00% | +18,463+7.1% | Added |
| Two Sigma Investments, LP | 321,571 | $9.25M | 0.01% | +199,948+164.4% | Added |
| Citadel Advisors LLC | 337,713 | $9.72M | 0.01% | +322,892+2,178.6% | Added |
| Northern Trust Corp | 360,806 | $10.4M | 0.00% | −31,461−8.0% | Reduced |
| Invesco Ltd. | 386,152 | $11.1M | 0.00% | +100,746+35.3% | Added |
| Royce & Associates LP | 387,069 | $11.1M | 0.11% | +29,489+8.2% | Added |
| Charles Schwab Investment Management Inc | 387,507 | $11.2M | 0.00% | −719−0.2% | Reduced |
| Emerald Mutual Fund Advisers Trust | 435,246 | $12.5M | 0.61% | +127,509+41.4% | Added |
| D. E. Shaw & Co., Inc. | 443,148 | $12.8M | 0.01% | −309,555−41.1% | Reduced |
| Nomura Asset Management International Inc. | 459,786 | $13.2M | 0.02% | +459,786 | New |
| Algert Global LLC | 460,771 | $13.3M | 0.21% | +172,891+60.1% | Added |
| Driehaus Capital Management LLC | 499,984 | $14.4M | 0.10% | −718,960−59.0% | Reduced |
| Dimensional Fund Advisors LP | 540,253 | $15.5M | 0.00% | +68,769+14.6% | Added |
| Qube Research & Technologies Ltd | 599,006 | $17.2M | 0.02% | +341,411+132.5% | Added |
| Telemark Asset Management, LLC | 619,900 | $17.8M | 1.78% | −70,100−10.2% | Reduced |
| First Trust Advisors LP | 682,967 | $19.7M | 0.01% | +224,576+49.0% | Added |
| Arrowstreet Capital, Limited Partnership | 683,202 | $19.7M | 0.01% | −77,255−10.2% | Reduced |
| Morgan Stanley | 705,442 | $20.3M | 0.00% | +369,677+110.1% | Added |
| UBS Group AG | 744,563 | $21.4M | 0.00% | +550,829+284.3% | Added |
| AWM Investment Company, Inc. | 754,220 | $21.7M | 2.10% | +8,750+1.2% | Added |
| Emerald Advisers, LLC | 757,568 | $21.8M | 0.67% | +236,385+45.4% | Added |
| Goldman Sachs Group Inc | 782,287 | $22.5M | 0.00% | −391,820−33.4% | Reduced |
| Oberweis Asset Management Inc | 835,900 | $24.1M | 0.88% | +170,200+25.6% | Added |
| Nuveen, LLC | 960,968 | $27.7M | 0.01% | +134,816+16.3% | Added |
| Atreides Management, LP | 1,044,193 | $30.1M | 0.64% | +272,698+35.3% | Added |
| Geode Capital Management, LLC | 1,090,710 | $31.4M | 0.00% | +20,855+1.9% | Added |
| State Street Corp | 1,192,093 | $34.3M | 0.00% | +56,215+4.9% | Added |
| Baillie Gifford & Co | 1,506,841 | $43.4M | 0.04% | +79,509+5.6% | Added |
| Vanguard Group Inc | 3,526,632 | $101.5M | 0.00% | +576,831+19.6% | Added |
| BlackRock, Inc. | 3,750,403 | $107.9M | 0.00% | +121,107+3.3% | Added |
| Fuller & Thaler Asset Management, Inc. | 0 | $0 | 0.00% | −809,945−100.0% | Sold out |
| Macquarie Group Ltd | 0 | $0 | 0.00% | −465,221−100.0% | Sold out |
| Wellington Management Group LLP | 0 | $0 | 0.00% | −399,246−100.0% | Sold out |
| Castleark Management LLC | 0 | $0 | 0.00% | −135,617−100.0% | Sold out |
| Next Century Growth Investors LLC | 0 | $0 | 0.00% | −128,220−100.0% | Sold out |
| Lisanti Capital Growth, LLC | 0 | $0 | 0.00% | −118,151−100.0% | Sold out |
| Jump Financial, LLC | 0 | $0 | 0.00% | −117,498−100.0% | Sold out |
| GMT Capital Corp | 0 | $0 | 0.00% | −108,066−100.0% | Sold out |
| Prudential Financial Inc | 0 | $0 | 0.00% | −107,190−100.0% | Sold out |
| Ghisallo Capital Management LLC | 0 | $0 | 0.00% | −100,000−100.0% | Sold out |
| Meridian Wealth Management, LLC | 0 | $0 | 0.00% | −91,102−100.0% | Sold out |
| Andrew Hill Investment Advisors, Inc. | 0 | $0 | 0.00% | −88,855−100.0% | Sold out |
| EAM Investors, LLC | 0 | $0 | 0.00% | −83,977−100.0% | Sold out |
| Penserra Capital Management LLC | 0 | $0 | 0.00% | −57,728−100.0% | Sold out |
| Private Advisor Group, LLC | 0 | $0 | 0.00% | −37,683−100.0% | Sold out |
| HWG Holdings LP | 0 | $0 | 0.00% | −35,468−100.0% | Sold out |
| Quantbot Technologies LP | 0 | $0 | 0.00% | −26,831−100.0% | Sold out |
| IMC-Chicago, LLC | 0 | $0 | 0.00% | −25,044−100.0% | Sold out |
| Dark Forest Capital Management LP | 0 | $0 | 0.00% | −23,858−100.0% | Sold out |
| Oppenheimer & Co Inc | 0 | $0 | 0.00% | −20,100−100.0% | Sold out |
| Comerica Bank | 0 | $0 | 0.00% | −18,808−100.0% | Sold out |
| Gsa Capital Partners LLP | 0 | $0 | 0.00% | −15,798−100.0% | Sold out |
| Neo Ivy Capital Management | 0 | $0 | 0.00% | −13,520−100.0% | Sold out |
| Ieq Capital, LLC | 0 | $0 | 0.00% | −12,889−100.0% | Sold out |
| Omers Administration Corp | 0 | $0 | 0.00% | −10,700−100.0% | Sold out |
| Sigma Planning Corp | 0 | $0 | 0.00% | −10,293−100.0% | Sold out |
| Integrated Quantitative Investments LLC | 0 | $0 | 0.00% | −9,333−100.0% | Sold out |
| Stephens Inc | 0 | $0 | 0.00% | −8,500−100.0% | Sold out |
| Counterpoint Mutual Funds LLC | 0 | $0 | 0.00% | −8,206−100.0% | Sold out |
| Creative Planning | 0 | $0 | 0.00% | −7,044−100.0% | Sold out |
| Baader Bank INC | 0 | $0 | 0.00% | −7,063−100.0% | Sold out |
| Great Valley Advisor Group, Inc. | 0 | $0 | 0.00% | −6,741−100.0% | Sold out |
| Scientech Research LLC | 0 | $0 | 0.00% | −6,585−100.0% | Sold out |
| Benjamin Edwards Inc | 0 | $0 | 0.00% | −6,219−100.0% | Sold out |
| Brinker Capital Investments, LLC | 0 | $0 | 0.00% | −6,132−100.0% | Sold out |
| Cornerstone Investment Partners, LLC | 0 | $0 | 0.00% | −6,102−100.0% | Sold out |
| Prostatis Group LLC | 0 | $0 | 0.00% | −6,011−100.0% | Sold out |
| Toth Financial Advisory Corp | 0 | $0 | 0.00% | −6,000−100.0% | Sold out |
| Savant Capital, LLC | 0 | $0 | 0.00% | −5,918−100.0% | Sold out |
| Pictet Asset Management Holding SA | 0 | $0 | 0.00% | −5,829−100.0% | Sold out |
| Mayflower Financial Advisors, LLC | 0 | $0 | 0.00% | −5,730−100.0% | Sold out |
| Promethium Advisors,llc | 0 | $0 | 0.00% | −5,500−100.0% | Sold out |
| Cinctive Capital Management LP | 0 | $0 | 0.00% | −5,256−100.0% | Sold out |
| Wealth Enhancement Advisory Services, LLC | 0 | $0 | 0.00% | −5,484−100.0% | Sold out |
| Vontobel Holding Ltd. | 0 | $0 | 0.00% | −5,021−100.0% | Sold out |
| Cim, LLC | 0 | $0 | 0.00% | −4,632−100.0% | Sold out |
| Occudo Quantitative Strategies LP | 0 | $0 | 0.00% | −4,100−100.0% | Sold out |
| Squarepoint Ops LLC | 0 | $0 | 0.00% | −4,086−100.0% | Sold out |
| Cerity Partners LLC | 0 | $0 | 0.00% | −3,906−100.0% | Sold out |
| Aigen Investment Management, LP | 0 | $0 | 0.00% | −3,822−100.0% | Sold out |
| Bank of Montreal | 0 | $0 | 0.00% | −3,797−100.0% | Sold out |
| Captrust Financial Advisors | 0 | $0 | 0.00% | −3,755−100.0% | Sold out |
| Anb Bank | 0 | $0 | 0.00% | −3,721−100.0% | Sold out |
| Hartline Investment Corp | 0 | $0 | 0.00% | −3,400−100.0% | Sold out |
| JustInvest LLC | 0 | $0 | 0.00% | −3,385−100.0% | Sold out |
| Xponance, Inc. | 0 | $0 | 0.00% | −3,379−100.0% | Sold out |
| Stance Capital LLC | 0 | $0 | 0.00% | −2,606−100.0% | Sold out |
| Mark Sheptoff Financial Planning, LLC | 0 | $0 | 0.00% | −2,000−100.0% | Sold out |
| Once Capital Management, LLC | 0 | $0 | 0.00% | −1,600−100.0% | Sold out |
| Banque Cantonale Vaudoise | 0 | $0 | 0.00% | −1,585−100.0% | Sold out |