American SuperconductorAMSC
13F holders, Q1 2026 (March 31)245holders +5
48new positions
42sold out
4famous investors
$33.83avg. 13F price*
At the end of Q1 2026, 245 institutions reported holding American Superconductor Corp. (AMSC) in their 13F filings, up 5 from Q4 2025. 48 opened new positions and 42 sold out. The largest holders were BlackRock, Inc. ($134.8M), Vanguard Capital Management LLC ($69.0M) and Vanguard Portfolio Management LLC ($57.9M). 4 famous investors held it, including David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio), Ken Griffin (0.0% of Citadel Advisors's portfolio) and Cliff Asness (0.0% of AQR Capital Management's portfolio).
- Company
- American Superconductor Corp.
- CUSIP
- 030111207
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 48 | $85.3M |
| Exits | 42 | $94.7M |
All 13F filers, Q4 2025 → Q1 2026: 5,035,672 shares bought and 5,454,379 shares sold, net −418,707 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 245 holders
| BlackRock, Inc. | 0.00% | Add +6.2% | 3,982,650 | $134.8M |
| Vanguard Capital Management LLC | 0.00% | — | 2,039,468 | $69.0M |
| Vanguard Portfolio Management LLC | 0.00% | — | 1,711,677 | $57.9M |
| Baillie Gifford & Co. | 0.05% | Reduce -3.9% | 1,447,419 | $49.0M |
| State Street Corp. | 0.00% | Add +5.8% | 1,261,071 | $42.7M |
| Geode Capital Management, LLC | 0.00% | Add +7.2% | 1,169,152 | $39.6M |
| Barrow Hanley Mewhinney & Strauss LLC | 0.13% | New | 1,139,793 | $38.6M |
| Nuveen, LLC | 0.01% | Add +6.2% | 1,020,947 | $34.6M |
| Oberweis Asset Management Inc./ | 0.85% | Add +1.7% | 849,900 | $28.8M |
| AWM Investment Company, Inc. | 3.00% | Add +6.3% | 801,604 | $27.1M |
| First Trust Advisors LP | 0.02% | Add +13.9% | 778,268 | $26.3M |
| Emerald Advisers, LLC | 0.81% | Reduce -0.0% | 757,404 | $25.6M |
| Goldman Sachs Group Inc. | 0.00% | Reduce -9.3% | 709,504 | $24.0M |
| Dimensional Fund Advisors LP | 0.00% | Add +21.9% | 658,297 | $22.3M |
| Morgan Stanley | 0.00% | Reduce -10.2% | 633,841 | $21.5M |
| Telemark Asset Management, LLC | 1.88% | Reduce -3.2% | 600,000 | $20.3M |
| UBS Group AG | 0.00% | Reduce -19.4% | 599,821 | $20.3M |
| D. E. Shaw & Co. | 0.02% | Add +28.1% | 567,574 | $19.2M |
| Royce & Associates LP | 0.18% | Add +40.2% | 542,778 | $18.4M |
| Legal & General Group Plc | 0.00% | Add +90.7% | 530,131 | $17.9M |
| Algert Global LLC | 0.25% | Add +6.3% | 489,971 | $16.6M |
| Arrowstreet Capital, Limited Partnership | 0.01% | Reduce -34.6% | 446,752 | $15.1M |
| Emerald Mutual Fund Advisers Trust | 0.72% | Add +0.8% | 438,875 | $14.9M |
| BNP Paribas Financial Markets | 0.01% | Add +429.3% | 436,687 | $14.8M |
| Hood River Capital Management LLC | 0.14% | New | 398,711 | $13.5M |
| Northern Trust Corp. | 0.00% | Add +9.0% | 393,224 | $13.3M |
| Charles Schwab Investment Management Inc. | 0.00% | Reduce -0.5% | 385,414 | $13.0M |
| Nomura Asset Management International Inc. | 0.02% | Reduce -17.5% | 379,483 | $12.8M |
| Qube Research & Technologies Ltd | 0.02% | Reduce -45.0% | 329,413 | $11.2M |
| Vanguard Fiduciary Trust Co. | 0.00% | — | 326,042 | $11.0M |
| Stephens Investment Management Group LLC | 0.14% | Add +77.1% | 308,515 | $10.4M |
| Portolan Capital Management, LLC | 0.53% | New | 295,636 | $10.0M |
| Panagora Asset Management Inc. | 0.03% | Add +0.6% | 256,392 | $8.7M |
| Invesco Ltd. | 0.00% | Reduce -37.6% | 240,792 | $8.2M |
| Essex Investment Management Co. LLC | 1.22% | Add +5.8% | 227,558 | $7.7M |
| Sei Investments Co. | 0.01% | Add +184.8% | 224,436 | $7.6M |
| Citadel Advisors | 0.01% | Reduce -35.8% | 216,713 | $7.3M |
| Bank of America Corp. | 0.00% | Add +26.5% | 209,451 | $7.1M |
| AQR Capital Management | 0.00% | Add +26.6% | 184,755 | $6.3M |
| Two Sigma Investments, LP | 0.00% | Reduce -47.4% | 169,016 | $5.7M |
| Baird Financial Group, Inc. | 0.01% | Add +21.0% | 163,258 | $5.5M |
| Palisades Investment Partners, LLC | 2.02% | Add +5.8% | 152,576 | $5.2M |
| FMR LLC | 0.00% | Add +18.4% | 147,293 | $5.0M |
| Allspring Global Investments Holdings, LLC | 0.01% | Reduce -26.9% | 149,601 | $4.9M |
| Balyasny Asset Management L.P. | 0.01% | Reduce -5.7% | 144,144 | $4.9M |
| ArrowMark Colorado Holdings LLC | 0.12% | Add +22.6% | 135,432 | $4.6M |
| Bank of New York Mellon Corp | 0.00% | Reduce -1.6% | 134,790 | $4.6M |
| JPMorgan Chase & Co. | 0.00% | Add +11.2% | 136,845 | $4.4M |
| Raymond James Financial Inc. | 0.00% | Reduce -12.6% | 123,954 | $4.2M |
| GMT Capital Corp | 0.17% | New | 108,066 | $3.7M |
| Millennium Management | 0.00% | Add +30.1% | 101,576 | $3.4M |
| Axiom Investors LLC | 0.04% | Reduce -24.8% | 100,814 | $3.4M |
| Swiss National Bank | 0.00% | No change | 89,100 | $3.0M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Add +14.5% | 88,386 | $3.0M |
| LPL Financial LLC | 0.00% | Add +117.9% | 87,323 | $3.0M |
| Alps Advisors Inc. | 0.01% | Add +39.1% | 86,561 | $2.9M |
| Mackenzie Financial Corp. | 0.00% | Add +92.7% | 77,542 | $2.6M |
| Maxi Investments CY Ltd | 0.56% | New | 75,754 | $2.6M |
| Lumbard & Kellner, LLC | 0.86% | Add +3.5% | 73,669 | $2.5M |
| New York State Common Retirement Fund | 0.00% | No change | 70,400 | $2.4M |
| Kennedy Capital Management LLC | 0.05% | Add +2.4% | 66,167 | $2.2M |
| Boston Partners | 0.00% | New | 66,071 | $2.2M |
| Campbell Newman Asset Management Inc. | 0.18% | Add +1.9% | 64,337 | $2.2M |
| Ameriprise Financial Inc. | 0.00% | Add +5.7% | 62,336 | $2.1M |
| Susquehanna International Group, LLP | 0.00% | Reduce -5.8% | 61,814 | $2.1M |
| Rhumbline Advisers | 0.00% | Add +3.5% | 59,683 | $2.0M |
| T. Rowe Price Associates Inc. | 0.00% | Reduce -78.7% | 58,612 | $2.0M |
| Amundi | 0.00% | Add +25.6% | 58,169 | $2.0M |
| Wells Fargo & Company | 0.00% | Reduce -56.6% | 58,158 | $2.0M |
| California State Teachers Retirement System | 0.00% | Add +12.0% | 57,016 | $1.9M |
| Janney Montgomery Scott LLC | 0.00% | Add +22.8% | 56,946 | $1.9M |
| Lazard Asset Management LLC | 0.00% | New | 56,452 | $1.9M |
| Cambridge Investment Research Advisors, Inc. | 0.00% | Add +22.6% | 48,551 | $1.6M |
| Rice Hall James & Associates, LLC | 0.09% | No change | 47,114 | $1.6M |
| Los Angeles Capital Management LLC | 0.01% | Add +69.7% | 43,512 | $1.5M |
| Tidal Investments LLC | 0.00% | Add +79.3% | 43,369 | $1.5M |
| HighTower Advisors, LLC | 0.00% | Add +312.9% | 43,267 | $1.5M |
| Deutsche Bank AG | 0.00% | Add +10.8% | 42,918 | $1.5M |
| Defiance ETFs, LLC | 0.02% | New | 42,227 | $1.4M |
| Legato Capital Management LLC | 0.12% | Reduce -1.4% | 40,121 | $1.4M |
| Quadrature Capital Ltd | 0.02% | New | 39,140 | $1.3M |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +18.3% | 38,802 | $1.3M |
| Alliancebernstein L.P. | 0.00% | Add +13.0% | 44,420 | $1.3M |
| Russell Investments Group, Ltd. | 0.00% | Add +6.6% | 37,364 | $1.3M |
| Merit Financial Group, LLC | 0.01% | Reduce -1.0% | 36,918 | $1.2M |
| SG Americas Securities, LLC | 0.00% | Reduce -50.2% | 35,385 | $1.2M |
| Kornitzer Capital Management Inc. | 0.03% | Reduce -3.3% | 34,973 | $1.2M |
| Hennion & Walsh Asset Management, Inc. | 0.04% | Add +72.3% | 33,355 | $1.1M |
| Focus Partners Wealth | 0.00% | Reduce -3.0% | 33,261 | $1.1M |
| Truist Financial Corp. | 0.00% | No change | 32,700 | $1.1M |
| Royal Bank of Canada | 0.00% | Reduce -30.6% | 31,336 | $1.1M |
| Quantum Private Wealth, LLC | 0.33% | Add +6.8% | 31,223 | $1.1M |
| Journey Strategic Wealth LLC | 0.03% | Add +17.9% | 31,117 | $1.1M |
| Franklin Resources Inc. | 0.00% | Reduce -15.9% | 29,478 | $998K |
| VANGUARD ASSET MANAGEMENT, Ltd | 0.00% | — | 29,288 | $991K |
| Virtus Advisers, LLC | 0.44% | Add +5.6% | 27,452 | $929K |
| ExodusPoint Capital Management, LP | 0.01% | Reduce -62.6% | 26,490 | $897K |
| MetLife Investment Management, LLC | 0.00% | Add +1.1% | 25,691 | $870K |
| Nissay Asset Management Corp. /Japan | 0.00% | Add +23.8% | 25,387 | $859K |
| Oppenheimer & Co. Inc. | 0.01% | New | 25,284 | $856K |
"% of holder's portfolio" is AMSC's weight in each manager's 13F, not the share of American Superconductor Corp. the manager owns.