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, Q3 2025
Institutional positions in American Superconductor Corp as of Sep 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
- 273
- +43 vs. Q2 2025
- Shares held
- 32.8M
- +90.2K (+0.3%) vs. Q2 2025
- Total value
- $1.95B
- +$747.0M (+62.2%) vs. Q2 2025
- New holders
- 72
- 92 more added
- Sold out
- 29
- 82 more reduced
2 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 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 | $953.6M |
| Q3 2025 | 273 | $1.95B |
| Q2 2025 | 232 | $1.20B |
| Q1 2025 | 189 | $500.1M |
| Q4 2024 | 191 | $678.1M |
| Q3 2024 | 171 | $643.8M |
| Q2 2024 | 155 | $638.3M |
| Q1 2024 | 128 | $326.7M |
| Q4 2023 | 99 | $180.6M |
| 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 | $178.5M |
| Q3 2021 | 101 | $243.3M |
| Q2 2021 | 105 | $286.0M |
| Q1 2021 | 104 | $312.5M |
Institutions, Q3 2025
Shares, value and share of portfolio for each institution holding American Superconductor Corp; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 3,629,296 | $215.5M | 0.00% | +209,257+6.1% | Added |
| Vanguard Group Inc | 2,949,801 | $175.2M | 0.00% | +502,754+20.5% | Added |
| Baillie Gifford & Co | 1,427,332 | $84.8M | 0.06% | −25,347−1.7% | Reduced |
| Driehaus Capital Management LLC | 1,218,944 | $72.4M | 0.52% | +379,097+45.1% | Added |
| Goldman Sachs Group Inc | 1,174,107 | $69.7M | 0.01% | +145,060+14.1% | Added |
| State Street Corp | 1,135,878 | $67.5M | 0.00% | +115,713+11.3% | Added |
| Geode Capital Management, LLC | 1,069,855 | $63.5M | 0.00% | +129,744+13.8% | Added |
| Nuveen, LLC | 826,152 | $49.1M | 0.01% | −171,750−17.2% | Reduced |
| Fuller & Thaler Asset Management, Inc. | 809,945 | $48.1M | 0.16% | +809,945 | New |
| Atreides Management, LP | 771,495 | $45.8M | 1.19% | −332,963−30.1% | Reduced |
| Arrowstreet Capital, Limited Partnership | 760,457 | $45.2M | 0.03% | +524,061+221.7% | Added |
| D. E. Shaw & Co., Inc. | 752,703 | $44.7M | 0.04% | +619,059+463.2% | Added |
| AWM Investment Company, Inc. | 745,470 | $44.3M | 4.15% | −813,008−52.2% | Reduced |
| Telemark Asset Management, LLC | 690,000 | $41.0M | 3.89% | 00.0% | Unchanged |
| Oberweis Asset Management Inc | 665,700 | $39.5M | 1.51% | −2,500−0.4% | Reduced |
| Emerald Advisers, LLC | 521,183 | $31.0M | 0.99% | +21,129+4.2% | Added |
| Dimensional Fund Advisors LP | 471,484 | $28.0M | 0.01% | −9,269−1.9% | Reduced |
| Macquarie Group Ltd | 465,221 | $27.6M | 0.03% | −356,958−43.4% | Reduced |
| First Trust Advisors LP | 458,391 | $27.2M | 0.02% | +120,817+35.8% | Added |
| Wellington Management Group LLP | 399,246 | $23.7M | 0.00% | −32,343−7.5% | Reduced |
| Price T Rowe Associates Inc | 396,332 | $23.5M | 0.00% | +368,479+1,322.9% | Added |
| Northern Trust Corp | 392,267 | $23.3M | 0.00% | +50,718+14.8% | Added |
| Charles Schwab Investment Management Inc | 388,226 | $23.1M | 0.00% | +65,268+20.2% | Added |
| Royce & Associates LP | 357,580 | $21.2M | 0.21% | −454,152−55.9% | Reduced |
| Morgan Stanley | 335,765 | $19.9M | 0.00% | −234,591−41.1% | Reduced |
| Renaissance Technologies LLC | 323,989 | $19.2M | 0.03% | +323,989 | New |
| Emerald Mutual Fund Advisers Trust | 307,737 | $18.3M | 0.94% | +93,823+43.9% | Added |
| Algert Global LLC | 287,880 | $17.1M | 0.29% | +82,175+39.9% | Added |
| Invesco Ltd. | 285,406 | $17.0M | 0.00% | +126,114+79.2% | Added |
| Axiom Investors LLC | 264,660 | $15.7M | 0.12% | +264,660 | New |
| Legal & General Group Plc | 259,563 | $15.4M | 0.00% | −157,476−37.8% | Reduced |
| Qube Research & Technologies Ltd | 257,595 | $15.3M | 0.02% | +127,475+98.0% | Added |
| Essex Investment Management Co LLC | 245,581 | $14.6M | 2.23% | −100,461−29.0% | Reduced |
| JPMorgan Chase & Co | 229,776 | $13.6M | 0.00% | +174,139+313.0% | Added |
| Wells Fargo & Company | 217,826 | $12.9M | 0.00% | −2,970−1.3% | Reduced |
| Panagora Asset Management Inc | 202,594 | $12.0M | 0.05% | +30,606+17.8% | Added |
| Allspring Global Investments Holdings, LLC | 199,571 | $11.8M | 0.02% | −73,825−27.0% | Reduced |
| Bank of America Corp | 198,030 | $11.8M | 0.00% | +28,889+17.1% | Added |
| UBS Group AG | 193,734 | $11.5M | 0.00% | −4,667−2.4% | Reduced |
| Tudor Investment Corp Et Al | 175,039 | $10.4M | 0.07% | −85,082−32.7% | Reduced |
| Voloridge Investment Management, LLC | 171,606 | $10.2M | 0.03% | +171,606 | New |
| AQR Capital Management LLC | 168,751 | $10.0M | 0.01% | −139−0.1% | Reduced |
| Raymond James Financial Inc | 167,316 | $9.94M | 0.00% | +402+0.2% | Added |
| Palisades Investment Partners, LLC | 141,109 | $8.38M | 3.29% | +611+0.4% | Added |
| Jane Street Group, LLC | 136,102 | $8.08M | 0.01% | −28,003−17.1% | Reduced |
| Castleark Management LLC | 135,617 | $8.05M | 0.23% | +26,447+24.2% | Added |
| Bank of New York Mellon Corp | 133,520 | $7.93M | 0.00% | +12,666+10.5% | Added |
| Next Century Growth Investors LLC | 128,220 | $7.61M | 0.56% | +128,220 | New |
| Susquehanna International Group, LLP | 127,171 | $7.55M | 0.01% | +31,906+33.5% | Added |
| Millennium Management LLC | 122,502 | $7.28M | 0.01% | −129,305−51.4% | Reduced |
| Two Sigma Investments, LP | 121,623 | $7.22M | 0.01% | −1,227−1.0% | Reduced |
| Lisanti Capital Growth, LLC | 118,151 | $7.02M | 1.72% | −62,599−34.6% | Reduced |
| Jump Financial, LLC | 117,498 | $6.98M | 0.09% | −11,137−8.7% | Reduced |
| ArrowMark Colorado Holdings LLC | 110,432 | $6.56M | 0.12% | −46,000−29.4% | Reduced |
| GMT Capital Corp | 108,066 | $6.42M | 0.29% | 00.0% | Unchanged |
| Prudential Financial Inc | 107,190 | $6.37M | 0.01% | +72,020+204.8% | Added |
| FMR LLC | 100,842 | $5.99M | 0.00% | +93,396+1,254.3% | Added |
| Ghisallo Capital Management LLC | 100,000 | $5.94M | 0.19% | −100,000−50.0% | Reduced |
| Engineers Gate Manager LP | 97,495 | $5.79M | 0.07% | +97,495 | New |
| Advisor Group Holdings, Inc. | 113,200 | $5.73M | 0.01% | −38,078−25.2% | Reduced |
| Meridian Wealth Management, LLC | 91,102 | $5.41M | 0.21% | +91,102 | New |
| Andrew Hill Investment Advisors, Inc. | 88,855 | $5.28M | 4.11% | −63,924−41.8% | Reduced |
| Swiss National Bank | 84,600 | $5.02M | 0.00% | +1,300+1.6% | Added |
| UBS Asset Management Americas Inc | 82,637 | $4.91M | 0.00% | −51,597−38.4% | Reduced |
| EAM Investors, LLC | 83,977 | $4.91M | 0.56% | +8,683+11.5% | Added |
| Baird Financial Group, Inc. | 80,790 | $4.80M | 0.01% | −2,292−2.8% | Reduced |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 79,079 | $4.70M | 0.01% | +69,166+697.7% | Added |
| Lumbard & Kellner, LLC | 72,439 | $4.30M | 1.58% | 00.0% | Unchanged |
| Verition Fund Management LLC | 71,186 | $4.23M | 0.02% | +33,986+91.4% | Added |
| Rhumbline Advisers | 70,425 | $4.18M | 0.00% | +9,263+15.1% | Added |
| Cetera Investment Advisers | 70,366 | $4.18M | 0.00% | +64,320+1,063.8% | Added |
| New York State Common Retirement Fund | 68,700 | $4.08M | 0.01% | −636−0.9% | Reduced |
| Stephens Investment Management Group LLC | 67,911 | $4.03M | 0.05% | +67,911 | New |
| Alps Advisors Inc | 66,325 | $3.94M | 0.02% | +1,682+2.6% | Added |
| SEI Investments Co | 66,198 | $3.93M | 0.00% | +24,125+57.3% | Added |
| Capital Fund Management S.A. | 65,535 | $3.89M | 0.04% | −46,810−41.7% | Reduced |
| Campbell Newman Asset Management Inc | 65,365 | $3.88M | 0.28% | +354+0.5% | Added |
| Kennedy Capital Management, Inc. | 64,601 | $3.84M | 0.08% | −81,608−55.8% | Reduced |
| BNP Paribas Arbitrage, SA | 63,009 | $3.74M | 0.00% | +55,208+707.7% | Added |
| Barclays PLC | 62,563 | $3.72M | 0.00% | −17,798−22.1% | Reduced |
| Rice Hall James & Associates, LLC | 60,724 | $3.61M | 0.20% | −34,007−35.9% | Reduced |
| Legato Capital Management LLC | 58,848 | $3.49M | 0.38% | −19,714−25.1% | Reduced |
| Penserra Capital Management LLC | 57,728 | $3.43M | 0.04% | −10,584−15.5% | Reduced |
| Aquatic Capital Management LLC | 53,873 | $3.20M | 0.06% | +20,848+63.1% | Added |
| California State Teachers Retirement System | 50,677 | $3.01M | 0.00% | −92−0.2% | Reduced |
| Cubist Systematic Strategies, LLC | 49,508 | $2.94M | 0.04% | +21,778+78.5% | Added |
| LPL Financial LLC | 48,693 | $2.89M | 0.00% | +12,423+34.3% | Added |
| Polen Capital Management LLC | 47,291 | $2.81M | 0.01% | +70+0.1% | Added |
| Group One Trading, L.P. | 46,903 | $2.79M | 0.08% | +39,604+542.6% | Added |
| Janney Montgomery Scott LLC | 45,731 | $2.72M | 0.01% | −30−0.1% | Reduced |
| Royal Bank of Canada | 43,363 | $2.58M | 0.00% | −19,639−31.2% | Reduced |
| Amundi | 41,730 | $2.54M | 0.00% | −2,165−4.9% | Reduced |
| Victory Capital Management Inc | 41,389 | $2.46M | 0.00% | +41,389 | New |
| Principal Financial Group Inc | 39,403 | $2.34M | 0.00% | +39,403 | New |
| Janus Henderson Group PLC | 39,350 | $2.34M | 0.00% | −7,411−15.8% | Reduced |
| Alliancebernstein L.P. | 39,320 | $2.34M | 0.00% | +3,600+10.1% | Added |
| Private Advisor Group, LLC | 37,683 | $2.24M | 0.01% | +37,683 | New |
| Deutsche Bank AG | 36,134 | $2.15M | 0.00% | +8,490+30.7% | Added |
| HWG Holdings LP | 35,468 | $2.11M | 0.53% | +35,468 | New |
| Cambridge Investment Research Advisors, Inc. | 35,077 | $2.08M | 0.01% | +129+0.4% | Added |