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
- 32.7M
- +6.83K (0.0%) vs. Q2 2025
- Total value
- $1.94B
- +$741.3M (+61.8%) vs. Q2 2025
- New holders
- 72
- 93 more added
- Sold out
- 29
- 81 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 | $953.2M |
| 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, 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 |
|---|---|---|---|---|---|
| Stephens Investment Management Group LLC | 67,911 | $4.03M | 0.05% | +67,911 | New |
| New York State Common Retirement Fund | 68,700 | $4.08M | 0.01% | −636−0.9% | Reduced |
| Cetera Investment Advisers | 70,366 | $4.18M | 0.00% | +64,320+1,063.8% | Added |
| Rhumbline Advisers | 70,425 | $4.18M | 0.00% | +9,263+15.1% | Added |
| Verition Fund Management LLC | 71,186 | $4.23M | 0.02% | +33,986+91.4% | Added |
| Lumbard & Kellner, LLC | 72,439 | $4.30M | 1.58% | 00.0% | Unchanged |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 79,079 | $4.70M | 0.01% | +69,166+697.7% | Added |
| Baird Financial Group, Inc. | 80,790 | $4.80M | 0.01% | −2,292−2.8% | Reduced |
| EAM Investors, LLC | 83,977 | $4.91M | 0.56% | +8,683+11.5% | Added |
| UBS Asset Management Americas Inc | 82,637 | $4.91M | 0.00% | −51,597−38.4% | Reduced |
| Swiss National Bank | 84,600 | $5.02M | 0.00% | +1,300+1.6% | Added |
| Andrew Hill Investment Advisors, Inc. | 88,855 | $5.28M | 4.11% | −63,924−41.8% | Reduced |
| Meridian Wealth Management, LLC | 91,102 | $5.41M | 0.21% | +91,102 | New |
| Advisor Group Holdings, Inc. | 113,200 | $5.73M | 0.01% | −38,078−25.2% | Reduced |
| Engineers Gate Manager LP | 97,495 | $5.79M | 0.07% | +97,495 | New |
| Ghisallo Capital Management LLC | 100,000 | $5.94M | 0.19% | −100,000−50.0% | Reduced |
| FMR LLC | 100,842 | $5.99M | 0.00% | +93,396+1,254.3% | Added |
| Prudential Financial Inc | 107,190 | $6.37M | 0.01% | +72,020+204.8% | Added |
| GMT Capital Corp | 108,066 | $6.42M | 0.29% | 00.0% | Unchanged |
| ArrowMark Colorado Holdings LLC | 110,432 | $6.56M | 0.12% | −46,000−29.4% | Reduced |
| JPMorgan Chase & Co | 114,888 | $6.82M | 0.00% | +59,251+106.5% | Added |
| Jump Financial, LLC | 117,498 | $6.98M | 0.09% | −11,137−8.7% | Reduced |
| Lisanti Capital Growth, LLC | 118,151 | $7.02M | 1.72% | −62,599−34.6% | Reduced |
| Two Sigma Investments, LP | 121,623 | $7.22M | 0.01% | −1,227−1.0% | Reduced |
| Millennium Management LLC | 122,502 | $7.28M | 0.01% | −129,305−51.4% | Reduced |
| Susquehanna International Group, LLP | 127,171 | $7.55M | 0.01% | +31,906+33.5% | Added |
| Next Century Growth Investors LLC | 128,220 | $7.61M | 0.56% | +128,220 | New |
| Bank of New York Mellon Corp | 133,520 | $7.93M | 0.00% | +12,666+10.5% | Added |
| Castleark Management LLC | 135,617 | $8.05M | 0.23% | +26,447+24.2% | Added |
| Jane Street Group, LLC | 136,102 | $8.08M | 0.01% | −28,003−17.1% | Reduced |
| Palisades Investment Partners, LLC | 141,109 | $8.38M | 3.29% | +611+0.4% | Added |
| Raymond James Financial Inc | 167,316 | $9.94M | 0.00% | +402+0.2% | Added |
| AQR Capital Management LLC | 168,751 | $10.0M | 0.01% | −139−0.1% | Reduced |
| Voloridge Investment Management, LLC | 171,606 | $10.2M | 0.03% | +171,606 | New |
| Tudor Investment Corp Et Al | 175,039 | $10.4M | 0.07% | −85,082−32.7% | Reduced |
| UBS Group AG | 193,734 | $11.5M | 0.00% | −4,667−2.4% | Reduced |
| Bank of America Corp | 198,030 | $11.8M | 0.00% | +28,889+17.1% | Added |
| Allspring Global Investments Holdings, LLC | 199,571 | $11.8M | 0.02% | −73,825−27.0% | Reduced |
| Panagora Asset Management Inc | 202,594 | $12.0M | 0.05% | +30,606+17.8% | Added |
| Wells Fargo & Company | 217,826 | $12.9M | 0.00% | −2,970−1.3% | Reduced |
| Essex Investment Management Co LLC | 245,581 | $14.6M | 2.23% | −100,461−29.0% | Reduced |
| Qube Research & Technologies Ltd | 257,595 | $15.3M | 0.02% | +127,475+98.0% | Added |
| Legal & General Group Plc | 259,563 | $15.4M | 0.00% | −157,476−37.8% | Reduced |
| Axiom Investors LLC | 264,660 | $15.7M | 0.12% | +264,660 | New |
| Invesco Ltd. | 285,406 | $17.0M | 0.00% | +126,114+79.2% | Added |
| Algert Global LLC | 287,880 | $17.1M | 0.29% | +82,175+39.9% | Added |
| Emerald Mutual Fund Advisers Trust | 307,737 | $18.3M | 0.94% | +93,823+43.9% | Added |
| Renaissance Technologies LLC | 323,989 | $19.2M | 0.03% | +323,989 | New |
| Morgan Stanley | 335,765 | $19.9M | 0.00% | −234,591−41.1% | Reduced |
| Royce & Associates LP | 357,580 | $21.2M | 0.21% | −454,152−55.9% | Reduced |
| Charles Schwab Investment Management Inc | 388,226 | $23.1M | 0.00% | +65,268+20.2% | Added |
| Northern Trust Corp | 392,267 | $23.3M | 0.00% | +50,718+14.8% | Added |
| Price T Rowe Associates Inc | 396,332 | $23.5M | 0.00% | +368,479+1,322.9% | Added |
| Wellington Management Group LLP | 399,246 | $23.7M | 0.00% | −32,343−7.5% | Reduced |
| First Trust Advisors LP | 458,391 | $27.2M | 0.02% | +120,817+35.8% | Added |
| Macquarie Group Ltd | 465,221 | $27.6M | 0.03% | −356,958−43.4% | Reduced |
| Dimensional Fund Advisors LP | 471,484 | $28.0M | 0.01% | −9,269−1.9% | Reduced |
| Emerald Advisers, LLC | 521,183 | $31.0M | 0.99% | +21,129+4.2% | Added |
| Oberweis Asset Management Inc | 665,700 | $39.5M | 1.51% | −2,500−0.4% | Reduced |
| Telemark Asset Management, LLC | 690,000 | $41.0M | 3.89% | 00.0% | Unchanged |
| AWM Investment Company, Inc. | 745,470 | $44.3M | 4.15% | −813,008−52.2% | Reduced |
| D. E. Shaw & Co., Inc. | 752,703 | $44.7M | 0.04% | +619,059+463.2% | Added |
| Arrowstreet Capital, Limited Partnership | 760,457 | $45.2M | 0.03% | +524,061+221.7% | Added |
| Atreides Management, LP | 771,495 | $45.8M | 1.19% | −332,963−30.1% | Reduced |
| Fuller & Thaler Asset Management, Inc. | 809,945 | $48.1M | 0.16% | +809,945 | New |
| Nuveen, LLC | 826,152 | $49.1M | 0.01% | −171,750−17.2% | Reduced |
| Geode Capital Management, LLC | 1,069,855 | $63.5M | 0.00% | +129,744+13.8% | Added |
| State Street Corp | 1,135,878 | $67.5M | 0.00% | +115,713+11.3% | Added |
| Goldman Sachs Group Inc | 1,174,107 | $69.7M | 0.01% | +145,060+14.1% | Added |
| Driehaus Capital Management LLC | 1,218,944 | $72.4M | 0.52% | +379,097+45.1% | Added |
| Baillie Gifford & Co | 1,427,332 | $84.8M | 0.06% | −25,347−1.7% | Reduced |
| Vanguard Group Inc | 2,949,801 | $175.2M | 0.00% | +502,754+20.5% | Added |
| BlackRock, Inc. | 3,629,296 | $215.5M | 0.00% | +209,257+6.1% | Added |
| Hood River Capital Management LLC | 0 | $0 | 0.00% | −1,168,906−100.0% | Sold out |
| Heights Capital Management, Inc | 0 | $0 | 0.00% | −340,102−100.0% | Sold out |
| Trexquant Investment LP | 0 | $0 | 0.00% | −159,483−100.0% | Sold out |
| Balyasny Asset Management LLC | 0 | $0 | 0.00% | −75,303−100.0% | Sold out |
| ExodusPoint Capital Management, LP | 0 | $0 | 0.00% | −74,362−100.0% | Sold out |
| Centiva Capital, LP | 0 | $0 | 0.00% | −56,940−100.0% | Sold out |
| Options Solutions, LLC | 0 | $0 | 0.00% | −47,221−100.0% | Sold out |
| XTX Topco Ltd | 0 | $0 | 0.00% | −42,213−100.0% | Sold out |
| Nkcfo LLC | 0 | $0 | 0.00% | −21,000−100.0% | Sold out |
| Cookson Peirce & Co Inc | 0 | $0 | 0.00% | −20,000−100.0% | Sold out |
| FNY Investment Advisers, LLC | 0 | $0 | 0.00% | −20,000−100.0% | Sold out |
| Shay Capital LLC | 0 | $0 | 0.00% | −19,500−100.0% | Sold out |
| Aster Capital Management (DIFC) Ltd | 0 | $0 | 0.00% | −18,809−100.0% | Sold out |
| Sowell Financial Services LLC | 0 | $0 | 0.00% | −15,451−100.0% | Sold out |
| Bridgefront Capital, LLC | 0 | $0 | 0.00% | −13,273−100.0% | Sold out |
| Bayesian Capital Management, LP | 0 | $0 | 0.00% | −13,000−100.0% | Sold out |
| Kestra Private Wealth Services, LLC | 0 | $0 | 0.00% | −12,511−100.0% | Sold out |
| Quadrature Capital Ltd | 0 | $0 | 0.00% | −8,533−100.0% | Sold out |
| Two Sigma Securities, LLC | 0 | $0 | 0.00% | −7,642−100.0% | Sold out |
| C2P Capital Advisory Group, LLC d.b.a. Prosperity Capital Advisors | 0 | $0 | 0.00% | −6,879−100.0% | Sold out |
| Lazard Asset Management LLC | 0 | $0 | 0.00% | −6,093−100.0% | Sold out |
| Garden State Investment Advisory Services LLC | 0 | $0 | 0.00% | −5,897−100.0% | Sold out |
| Park Square Financial Group, LLC | 0 | $0 | 0.00% | −493−100.0% | Sold out |
| Walleye Capital LLC | 0 | $0 | 0.00% | −323−100.0% | Sold out |
| Caitong International Asset Management Co., Ltd | 0 | $0 | 0.00% | −251−100.0% | Sold out |
| Skopos Labs, Inc. | 0 | $0 | 0.00% | −122−100.0% | Sold out |
| Hantz Financial Services, Inc. | 0 | $0 | 0.00% | −20−100.0% | Sold out |