American SuperconductorAMSC
13F holders, Q3 2025 (September 30)272holders +40
69new positions
29sold out
8famous investors
$59.36avg. 13F price*
At the end of Q3 2025, 272 institutions reported holding American Superconductor Corp. (AMSC) in their 13F filings, up 40 from Q2 2025. 69 opened new positions and 29 sold out. The largest holders were BlackRock, Inc. ($215.5M), Vanguard Group Inc. ($175.2M) and Baillie Gifford & Co. ($84.8M). 8 famous investors held it, including Gavin Baker (1.2% of Atreides Management's portfolio), Paul Tudor Jones (0.1% of Tudor Investment Corporation's portfolio) and David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio).
- Company
- American Superconductor Corp.
- CUSIP
- 030111207
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 69 | $146.2M |
| Exits | 29 | $79.0M |
All 13F filers, Q2 2025 → Q3 2025: 7,043,151 shares bought and 7,062,823 shares sold, net −19,672 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 272 holders
| BlackRock, Inc. | 0.00% | Add +6.1% | 3,629,296 | $215.5M |
| Vanguard Group Inc. | 0.00% | Add +20.6% | 2,949,801 | $175.2M |
| Baillie Gifford & Co. | 0.06% | Reduce -1.7% | 1,427,332 | $84.8M |
| Driehaus Capital Management LLC | 0.52% | Add +45.1% | 1,218,944 | $72.4M |
| Goldman Sachs Group Inc. | 0.01% | Add +14.1% | 1,174,107 | $69.7M |
| State Street Corp. | 0.00% | Add +11.3% | 1,135,878 | $67.5M |
| Geode Capital Management, LLC | 0.00% | Add +13.8% | 1,069,855 | $63.5M |
| Nuveen, LLC | 0.01% | Reduce -17.2% | 826,152 | $49.1M |
| Fuller & Thaler Asset Management, Inc. | 0.16% | New | 809,945 | $48.1M |
| Atreides Management | 1.19% | Reduce -30.1% | 771,495 | $45.8M |
| Arrowstreet Capital, Limited Partnership | 0.03% | Add +221.7% | 760,457 | $45.2M |
| D. E. Shaw & Co. | 0.04% | Add +463.2% | 752,703 | $44.7M |
| AWM Investment Company, Inc. | 4.15% | Reduce -52.2% | 745,470 | $44.3M |
| Telemark Asset Management, LLC | 3.89% | No change | 690,000 | $41.0M |
| Oberweis Asset Management Inc./ | 1.51% | Reduce -0.4% | 665,700 | $39.5M |
| Emerald Advisers, LLC | 0.99% | Add +4.2% | 521,183 | $31.0M |
| Dimensional Fund Advisors LP | 0.01% | Reduce -1.9% | 471,484 | $28.0M |
| Macquarie Group Ltd. | 0.03% | Reduce -43.4% | 465,221 | $27.6M |
| First Trust Advisors LP | 0.02% | Add +35.8% | 458,391 | $27.2M |
| Wellington Management Group LLP | 0.00% | Reduce -7.5% | 399,246 | $23.7M |
| T. Rowe Price Associates Inc. | 0.00% | Add +1322.9% | 396,332 | $23.5M |
| Northern Trust Corp. | 0.00% | Add +14.8% | 392,267 | $23.3M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +20.2% | 388,226 | $23.1M |
| Royce & Associates LP | 0.21% | Reduce -56.0% | 357,580 | $21.2M |
| Morgan Stanley | 0.00% | Reduce -41.1% | 335,765 | $19.9M |
| Renaissance Technologies | 0.03% | New | 323,989 | $19.2M |
| Emerald Mutual Fund Advisers Trust | 0.94% | Add +43.9% | 307,737 | $18.3M |
| Algert Global LLC | 0.29% | Add +40.0% | 287,880 | $17.1M |
| Invesco Ltd. | 0.00% | Add +79.2% | 285,406 | $17.0M |
| Axiom Investors LLC | 0.12% | New | 264,660 | $15.7M |
| Legal & General Group Plc | 0.00% | Reduce -37.8% | 259,563 | $15.4M |
| Qube Research & Technologies Ltd | 0.02% | Add +98.0% | 257,595 | $15.3M |
| Essex Investment Management Co. LLC | 2.23% | Reduce -29.0% | 245,581 | $14.6M |
| Wells Fargo & Company | 0.00% | Reduce -1.4% | 217,826 | $12.9M |
| Panagora Asset Management Inc. | 0.05% | Add +17.8% | 202,594 | $12.0M |
| Allspring Global Investments Holdings, LLC | 0.02% | Reduce -27.0% | 199,571 | $11.8M |
| Bank of America Corp. | 0.00% | Add +17.1% | 198,030 | $11.8M |
| UBS Group AG | 0.00% | Reduce -2.4% | 193,734 | $11.5M |
| Tudor Investment Corporation | 0.07% | Reduce -32.7% | 175,039 | $10.4M |
| Voloridge Investment Management, LLC | 0.03% | New | 171,606 | $10.2M |
| AQR Capital Management | 0.01% | Reduce -0.1% | 168,751 | $10.0M |
| Raymond James Financial Inc. | 0.00% | Add +0.2% | 167,316 | $9.9M |
| Palisades Investment Partners, LLC | 3.29% | Add +0.4% | 141,109 | $8.4M |
| Jane Street Group, LLC | 0.01% | Reduce -17.1% | 136,102 | $8.1M |
| Castleark Management LLC | 0.23% | Add +24.2% | 135,617 | $8.1M |
| Bank of New York Mellon Corp | 0.00% | Add +10.5% | 133,520 | $7.9M |
| Next Century Growth Investors LLC | 0.56% | New | 128,220 | $7.6M |
| Susquehanna International Group, LLP | 0.01% | Add +33.5% | 127,171 | $7.6M |
| Millennium Management | 0.01% | Reduce -51.4% | 122,502 | $7.3M |
| Two Sigma Investments, LP | 0.01% | Reduce -1.0% | 121,623 | $7.2M |
| Lisanti Capital Growth, LLC | 1.72% | Reduce -34.6% | 118,151 | $7.0M |
| Jump Financial, LLC | 0.09% | Reduce -8.7% | 117,498 | $7.0M |
| JPMorgan Chase & Co. | 0.00% | Add +106.5% | 114,888 | $6.8M |
| ArrowMark Colorado Holdings LLC | 0.12% | Reduce -29.4% | 110,432 | $6.6M |
| GMT Capital Corp | 0.29% | No change | 108,066 | $6.4M |
| Prudential Financial Inc. | 0.01% | Add +204.8% | 107,190 | $6.4M |
| FMR LLC | 0.00% | Add +1254.3% | 100,842 | $6.0M |
| Ghisallo Capital Management LLC | 0.19% | Reduce -50.0% | 100,000 | $5.9M |
| Engineers Gate Manager LP | 0.07% | New | 97,495 | $5.8M |
| Osaic Holdings, Inc. | 0.01% | Reduce -25.2% | 113,200 | $5.7M |
| Meridian Wealth Management, LLC | 0.21% | New | 91,102 | $5.4M |
| Andrew Hill Investment Advisors, Inc. | 4.11% | Reduce -41.8% | 88,855 | $5.3M |
| Swiss National Bank | 0.00% | Add +1.6% | 84,600 | $5.0M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Reduce -38.4% | 82,637 | $4.9M |
| Informed Momentum Co LLC | 0.56% | Add +11.5% | 83,977 | $4.9M |
| Baird Financial Group, Inc. | 0.01% | Reduce -2.8% | 80,790 | $4.8M |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 0.01% | Add +697.7% | 79,079 | $4.7M |
| Lumbard & Kellner, LLC | 1.58% | No change | 72,439 | $4.3M |
| Verition Fund Management LLC | 0.03% | Add +91.4% | 71,186 | $4.2M |
| Rhumbline Advisers | 0.00% | Add +15.2% | 70,425 | $4.2M |
| Cetera Investment Advisers | 0.00% | Add +1063.8% | 70,366 | $4.2M |
| New York State Common Retirement Fund | 0.01% | Reduce -0.9% | 68,700 | $4.1M |
| Stephens Investment Management Group LLC | 0.05% | New | 67,911 | $4.0M |
| Alps Advisors Inc. | 0.02% | Add +2.6% | 66,325 | $3.9M |
| Sei Investments Co. | 0.00% | Add +57.3% | 66,198 | $3.9M |
| Capital Fund Management S.A. | 0.04% | Reduce -41.7% | 65,535 | $3.9M |
| Campbell Newman Asset Management Inc. | 0.28% | Add +0.5% | 65,365 | $3.9M |
| Kennedy Capital Management LLC | 0.08% | Reduce -55.8% | 64,601 | $3.8M |
| BNP Paribas Financial Markets | 0.00% | Add +707.7% | 63,009 | $3.7M |
| Barclays PLC | 0.00% | Reduce -22.1% | 62,563 | $3.7M |
| Rice Hall James & Associates, LLC | 0.20% | Reduce -35.9% | 60,724 | $3.6M |
| Legato Capital Management LLC | 0.38% | Reduce -25.1% | 58,848 | $3.5M |
| Penserra Capital Management LLC | 0.04% | Reduce -15.5% | 57,728 | $3.4M |
| Aquatic Capital Management LLC | 0.06% | Add +63.1% | 53,873 | $3.2M |
| California State Teachers Retirement System | 0.00% | Reduce -0.2% | 50,677 | $3.0M |
| Cubist Systematic Strategies, LLC | 0.04% | Add +78.5% | 49,508 | $2.9M |
| LPL Financial LLC | 0.00% | Add +34.3% | 48,693 | $2.9M |
| Polen Capital Management LLC | 0.01% | Add +0.1% | 47,291 | $2.8M |
| Group One Trading LLC | 0.08% | Add +542.6% | 46,903 | $2.8M |
| Janney Montgomery Scott LLC | 0.01% | Reduce -0.1% | 45,731 | $2.7M |
| Royal Bank of Canada | 0.00% | Add +37.7% | 43,363 | $2.6M |
| Amundi | 0.00% | Reduce -4.9% | 41,730 | $2.5M |
| Victory Capital Management Inc. | 0.00% | New | 41,389 | $2.5M |
| Principal Financial Group Inc. | 0.00% | New | 39,403 | $2.3M |
| Janus Henderson Group PLC | 0.00% | Reduce -15.8% | 39,350 | $2.3M |
| Alliancebernstein L.P. | 0.00% | Add +10.1% | 39,320 | $2.3M |
| Private Advisor Group, LLC | 0.01% | New | 37,683 | $2.2M |
| Deutsche Bank AG | 0.00% | Add +30.7% | 36,134 | $2.1M |
| HWG Holdings LP | 0.53% | New | 35,468 | $2.1M |
| Cambridge Investment Research Advisors, Inc. | 0.01% | Add +0.4% | 35,077 | $2.1M |
"% of holder's portfolio" is AMSC's weight in each manager's 13F, not the share of American Superconductor Corp. the manager owns.