American SuperconductorAMSC
13F holders, Q2 2025 (June 30)232holders +43
68new positions
26sold out
7famous investors
$36.70avg. 13F price*
At the end of Q2 2025, 232 institutions reported holding American Superconductor Corp. (AMSC) in their 13F filings, up 43 from Q1 2025. 68 opened new positions and 26 sold out. The largest holders were BlackRock, Inc. ($125.5M), Vanguard Group Inc. ($89.8M) and AWM Investment Company, Inc. ($57.2M). 7 famous investors held it, including Gavin Baker (1.1% of Atreides Management's portfolio), Paul Tudor Jones (0.1% of Tudor Investment Corporation's portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- American Superconductor Corp.
- CUSIP
- 030111207
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2025 → Q2 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 68 | $78.4M |
| Exits | 26 | $9.8M |
All 13F filers, Q1 2025 → Q2 2025: 7,165,692 shares bought and 2,001,385 shares sold, net +5,164,307 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 232 holders
| BlackRock, Inc. | 0.00% | Add +5.0% | 3,420,039 | $125.5M |
| Vanguard Group Inc. | 0.00% | Add +7.0% | 2,447,047 | $89.8M |
| AWM Investment Company, Inc. | 6.41% | No change | 1,558,478 | $57.2M |
| Baillie Gifford & Co. | 0.04% | Reduce -4.4% | 1,452,679 | $53.3M |
| Hood River Capital Management LLC | 0.60% | Reduce -5.7% | 1,168,906 | $42.9M |
| Atreides Management | 1.12% | Add +34.0% | 1,104,458 | $40.5M |
| Goldman Sachs Group Inc. | 0.01% | Add +113.5% | 1,029,047 | $37.8M |
| State Street Corp. | 0.00% | Add +14.6% | 1,020,165 | $37.4M |
| Nuveen, LLC | 0.01% | Add +28.2% | 997,902 | $36.6M |
| Geode Capital Management, LLC | 0.00% | Add +6.6% | 940,111 | $34.5M |
| Driehaus Capital Management LLC | 0.25% | Add +0.0% | 839,847 | $30.8M |
| Macquarie Group Ltd. | 0.04% | Reduce -19.9% | 822,179 | $30.2M |
| Royce & Associates LP | 0.31% | Reduce -6.4% | 811,732 | $29.8M |
| Telemark Asset Management, LLC | 2.69% | Add +15.0% | 690,000 | $25.3M |
| Citadel Advisors | 0.02% | Add +424.2% | 689,691 | $25.3M |
| Oberweis Asset Management Inc./ | 1.07% | No change | 668,200 | $24.5M |
| Morgan Stanley | 0.00% | Add +11.9% | 570,356 | $20.9M |
| Emerald Advisers, LLC | 0.67% | Add +1191.5% | 500,054 | $18.3M |
| Dimensional Fund Advisors LP | 0.00% | Reduce -28.1% | 480,753 | $17.6M |
| Wellington Management Group LLP | 0.00% | Add +49.3% | 431,589 | $15.8M |
| Legal & General Group Plc | 0.00% | Add +14.4% | 417,039 | $15.3M |
| Essex Investment Management Co. LLC | 2.31% | Reduce -7.0% | 346,042 | $12.7M |
| Northern Trust Corp. | 0.00% | Add +3.3% | 341,549 | $12.5M |
| Heights Capital Management, Inc. | 4.04% | New | 340,102 | $12.5M |
| First Trust Advisors LP | 0.01% | Add +2.1% | 337,574 | $12.4M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +4.3% | 322,958 | $11.8M |
| Allspring Global Investments Holdings, LLC | 0.02% | Reduce -19.8% | 273,396 | $9.8M |
| Tudor Investment Corporation | 0.07% | Add +1193.2% | 260,121 | $9.5M |
| Millennium Management | 0.01% | Add +11.6% | 251,807 | $9.2M |
| Arrowstreet Capital, Limited Partnership | 0.01% | New | 236,396 | $8.7M |
| Wells Fargo & Company | 0.00% | Add +370.4% | 220,796 | $8.1M |
| Hillsdale Investment Management Inc. | 0.30% | Add +15.6% | 220,000 | $8.1M |
| Emerald Mutual Fund Advisers Trust | 0.48% | Add +1598.1% | 213,914 | $7.8M |
| Algert Global LLC | 0.16% | Add +115.0% | 205,705 | $7.5M |
| Ghisallo Capital Management LLC | 0.20% | New | 200,000 | $7.3M |
| UBS Group AG | 0.00% | Add +13.2% | 198,401 | $7.3M |
| Lisanti Capital Growth, LLC | 1.84% | New | 180,750 | $6.6M |
| Panagora Asset Management Inc. | 0.03% | Add +18.4% | 171,988 | $6.3M |
| Bank of America Corp. | 0.00% | Add +219.5% | 169,141 | $6.2M |
| AQR Capital Management | 0.01% | Reduce -20.0% | 168,890 | $6.2M |
| Raymond James Financial Inc. | 0.00% | Add +5.7% | 166,914 | $6.1M |
| Jane Street Group, LLC | 0.01% | Add +35.0% | 164,105 | $6.0M |
| Trexquant Investment LP | 0.07% | Reduce -34.2% | 159,483 | $5.9M |
| Invesco Ltd. | 0.00% | Reduce -34.6% | 159,292 | $5.8M |
| ArrowMark Colorado Holdings LLC | 0.10% | Add +19.9% | 156,432 | $5.7M |
| Andrew Hill Investment Advisors, Inc. | 4.51% | Add +109.6% | 152,779 | $5.6M |
| Osaic Holdings, Inc. | 0.01% | Add +40.9% | 151,278 | $5.6M |
| Squarepoint Ops LLC | 0.01% | Add +223.7% | 147,224 | $5.4M |
| Kennedy Capital Management LLC | 0.13% | Add +661.4% | 146,209 | $5.4M |
| Palisades Investment Partners, LLC | 2.25% | Reduce -2.8% | 140,498 | $5.2M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Add +87.6% | 134,234 | $4.9M |
| D. E. Shaw & Co. | 0.01% | Add +78.2% | 133,644 | $4.9M |
| Qube Research & Technologies Ltd | 0.01% | Reduce -68.2% | 130,120 | $4.8M |
| Jump Financial, LLC | 0.06% | New | 128,635 | $4.7M |
| Two Sigma Investments, LP | 0.01% | Add +183.3% | 122,850 | $4.5M |
| Bank of New York Mellon Corp | 0.00% | Add +12.0% | 120,854 | $4.4M |
| Capital Fund Management S.A. | 0.05% | Reduce -23.8% | 112,345 | $4.1M |
| Castleark Management LLC | 0.12% | New | 109,170 | $4.0M |
| GMT Capital Corp | 0.17% | No change | 108,066 | $4.0M |
| Susquehanna International Group, LLP | 0.01% | Add +87.4% | 95,265 | $3.5M |
| Rice Hall James & Associates, LLC | 0.19% | Add +14.5% | 94,731 | $3.5M |
| Swiss National Bank | 0.00% | Add +14.7% | 83,300 | $3.1M |
| Baird Financial Group, Inc. | 0.01% | Reduce -3.1% | 83,082 | $3.0M |
| Barclays PLC | 0.00% | Add +67.4% | 80,361 | $2.9M |
| Legato Capital Management LLC | 0.34% | Add +77.1% | 78,562 | $2.9M |
| Balyasny Asset Management L.P. | 0.01% | Add +239.1% | 75,303 | $2.8M |
| Informed Momentum Co LLC | 0.42% | New | 75,294 | $2.8M |
| ExodusPoint Capital Management, LP | 0.03% | Add +105.0% | 74,362 | $2.7M |
| Lumbard & Kellner, LLC | 1.16% | New | 72,439 | $2.7M |
| New York State Common Retirement Fund | 0.00% | Add +4.2% | 69,336 | $2.5M |
| Penserra Capital Management LLC | 0.04% | New | 68,312 | $2.5M |
| Campbell Newman Asset Management Inc. | 0.19% | Add +7.2% | 65,011 | $2.4M |
| Alps Advisors Inc. | 0.01% | Add +8.7% | 64,643 | $2.4M |
| Rhumbline Advisers | 0.00% | Add +24.4% | 61,162 | $2.2M |
| Centiva Capital, LP | 0.14% | New | 56,940 | $2.1M |
| JPMorgan Chase & Co. | 0.00% | Reduce -4.8% | 55,637 | $2.0M |
| California State Teachers Retirement System | 0.00% | Add +42.8% | 50,769 | $1.9M |
| Franklin Resources Inc. | 0.00% | Add +14.5% | 50,515 | $1.9M |
| Merit Financial Group, LLC | 0.02% | Reduce -3.6% | 49,895 | $1.8M |
| Mackenzie Financial Corp. | 0.00% | New | 49,770 | $1.8M |
| Bantamac Capital, LLC | 0.62% | Add +11.1% | 47,221 | $1.7M |
| Polen Capital Management LLC | 0.01% | New | 47,221 | $1.7M |
| Amundi | 0.00% | Reduce -11.8% | 43,895 | $1.7M |
| Janus Henderson Group PLC | 0.00% | Add +196.0% | 46,761 | $1.7M |
| Janney Montgomery Scott LLC | 0.00% | New | 45,761 | $1.7M |
| Point72 Asset Management | 0.00% | Add +7.6% | 45,659 | $1.7M |
| Oppenheimer & Co. Inc. | 0.02% | Add +335.9% | 43,595 | $1.6M |
| XTX Topco Ltd | 0.06% | Add +159.5% | 42,213 | $1.5M |
| Sei Investments Co. | 0.00% | Add +40.9% | 42,073 | $1.5M |
| Fox Run Management, L.L.C. | 0.23% | Add +30.6% | 37,505 | $1.4M |
| Verition Fund Management LLC | 0.01% | Reduce -16.0% | 37,200 | $1.4M |
| Kornitzer Capital Management Inc. | 0.03% | New | 36,660 | $1.3M |
| LPL Financial LLC | 0.00% | Add +7.4% | 36,270 | $1.3M |
| Alliancebernstein L.P. | 0.00% | No change | 35,720 | $1.3M |
| Prudential Financial Inc. | 0.00% | New | 35,170 | $1.3M |
| Cambridge Investment Research Advisors, Inc. | 0.00% | Reduce -7.4% | 34,948 | $1.3M |
| Dark Forest Capital Management LP | 0.05% | Reduce -47.8% | 34,747 | $1.3M |
| Aquatic Capital Management LLC | 0.02% | New | 33,025 | $1.2M |
| Royal Bank of Canada | 0.00% | Add +20.3% | 31,501 | $1.2M |
| T. Rowe Price Associates Inc. | 0.00% | Add +14.7% | 27,853 | $1.0M |
"% of holder's portfolio" is AMSC's weight in each manager's 13F, not the share of American Superconductor Corp. the manager owns.