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AMSC

American Superconductor Corp /De/
$37.11 -2.81 (-7.04%) At close · Jul 2
Market Cap
$1.77B
Shares
47,694,445

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

The Jun 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out.
Holders: 245
Total Value: $1,102,633,740
Total Shares: 32,573,963
Showing 1–100 of 258 holdings by value · page 1 of 3

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 245 13F filers
Top Holder
12.2%
Jun 2023 → Mar 2026 · range 8.8% – 16.3%
of institutional value
Top 5
30.4%
Jun 2023 → Mar 2026 · range 28.4% – 54.8%
of institutional value
Top 10
44.5%
Jun 2023 → Mar 2026 · range 43.4% – 74.0%
of institutional value
HHI
339
Jun 2023 → Mar 2026 · range 300 – 787
Broadly held
Showing 100 of 258
All Common Calls Puts
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Holder Value (USD) % of 13F Shares Open
Mega BlackRock, Inc. $134,812,694 12.23% 3,982,650
Mega VANGUARD CAPITAL MANAGEMENT LLC $69,035,991 6.26% 2,039,468
Large BAILLIE GIFFORD & CO $48,995,131 4.44% 1,447,419
Mega STATE STREET CORP $42,687,253 3.87% 1,261,071
Mega GEODE CAPITAL MANAGEMENT, LLC $39,575,794 3.59% 1,169,152
Large BARROW HANLEY MEWHINNEY & STRAUSS LLC $38,581,992 3.50% 1,139,793
Mega Nuveen, LLC $34,559,055 3.13% 1,020,947
Mid OBERWEIS ASSET MANAGEMENT INC/ $28,769,115 2.61% 849,900
Small AWM Investment Company, Inc. $27,134,295 2.46% 801,604
Mega FIRST TRUST ADVISORS LP $26,344,371 2.39% 778,268
Mid EMERALD ADVISERS, LLC $25,638,125 2.33% 757,404
Mega GOLDMAN SACHS GROUP INC $24,016,709 2.18% 709,504
Mega DIMENSIONAL FUND ADVISORS LP $22,283,351 2.02% 658,297
Mega MORGAN STANLEY $21,455,514 1.95% 633,841
Mid Telemark Asset Management, LLC $20,310,000 1.84% 600,000
Mega UBS Group AG $20,303,939 1.84% 599,821
Mega D. E. Shaw & Co., Inc. $19,212,379 1.74% 567,574
Mid ROYCE & ASSOCIATES LP $18,373,035 1.67% 542,778
Mega Legal & General Group Plc $17,944,932 1.63% 530,131
Mid ALGERT GLOBAL LLC $16,585,518 1.50% 489,971
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP $15,122,555 1.37% 446,752
Mid EMERALD MUTUAL FUND ADVISERS TRUST Mutual Fund $14,855,918 1.35% 438,875
Mega BNP PARIBAS ARBITRAGE, SA $14,781,854 1.34% 436,687
Mid Hood River Capital Management LLC $13,496,367 1.22% 398,711
Mega NORTHERN TRUST CORP Bank $13,310,630 1.21% 393,224
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $13,046,263 1.18% 385,414
Large NOMURA ASSET MANAGEMENT INTERNATIONAL INC. $12,845,499 1.16% 379,483
Large Qube Research & Technologies Ltd $11,150,630 1.01% 329,413
Mega VANGUARD FIDUCIARY TRUST CO Bank $11,036,521 1.00% 326,042
Mid Stephens Investment Management Group LLC $10,443,232 0.95% 308,515
Mid Portolan Capital Management, LLC $10,007,278 0.91% 295,636
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $9,701,410 0.88% 286,600
Large PANAGORA ASSET MANAGEMENT INC $8,678,869 0.79% 256,392
Mega Invesco Ltd. $8,150,806 0.74% 240,792
Small ESSEX INVESTMENT MANAGEMENT CO LLC $7,702,838 0.70% 227,558
Large SEI INVESTMENTS CO $7,597,158 0.69% 224,436
Mega CITADEL ADVISORS LLC $7,335,734 0.67% 216,713
Mega BANK OF AMERICA CORP /DE/ Bank $7,089,916 0.64% 209,451
Mega AQR CAPITAL MANAGEMENT LLC $6,253,953 0.57% 184,755
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $6,228,400 0.56% 184,000
Mega CITADEL ADVISORS LLC $5,754,500 0.52% 170,000
Mega TWO SIGMA INVESTMENTS, LP $5,721,191 0.52% 169,016
Large Baird Financial Group, Inc. $5,526,282 0.50% 163,258
Small Palisades Investment Partners, LLC $5,164,697 0.47% 152,576
Large Allspring Global Investments Holdings, LLC $5,063,993 0.46% 149,601
Mega FMR LLC $4,985,867 0.45% 147,293
Large Balyasny Asset Management L.P. $4,879,273 0.44% 144,144
Mega JPMORGAN CHASE & CO $4,632,202 0.42% 136,845
Mega JANE STREET GROUP, LLC $4,617,140 0.42% 136,400
Mid ArrowMark Colorado Holdings LLC $4,584,373 0.42% 135,432
Mega Bank of New York Mellon Corp Bank $4,562,639 0.41% 134,790
Mega RAYMOND JAMES FINANCIAL INC $4,195,842 0.38% 123,954
Mid GMT Capital Corp $3,658,034 0.33% 108,066
Large Point72 Asset Management, L.P. $3,605,025 0.33% 106,500
Mega MILLENNIUM MANAGEMENT LLC $3,438,347 0.31% 101,576
Mid AXIOM INVESTORS LLC /DE $3,412,553 0.31% 100,814
Mega Swiss National Bank Bank $3,016,035 0.27% 89,100
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $2,991,862 0.27% 88,386
Mega LPL Financial LLC $2,955,883 0.27% 87,323
Large ALPS ADVISORS INC $2,930,089 0.27% 86,561
Mega CITADEL ADVISORS LLC $2,873,865 0.26% 84,900
Large MACKENZIE FINANCIAL CORP $2,624,796 0.24% 77,542
Small Maxi Investments CY Ltd $2,564,272 0.23% 75,754
Small Lumbard & Kellner, LLC $2,493,695 0.23% 73,669
Large NEW YORK STATE COMMON RETIREMENT FUND Pension $2,383,040 0.22% 70,400
Mid KENNEDY CAPITAL MANAGEMENT LLC $2,239,752 0.20% 66,167
Large Boston Partners $2,236,503 0.20% 66,071
Mid CAMPBELL NEWMAN ASSET MANAGEMENT INC $2,177,807 0.20% 64,337
Mega AMERIPRISE FINANCIAL INC $2,110,072 0.19% 62,336
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $2,092,403 0.19% 61,814
Mega RHUMBLINE ADVISERS $2,020,269 0.18% 59,683
Mega PRICE T ROWE ASSOCIATES INC /MD/ $1,984,016 0.18% 58,612
Mega Amundi $1,969,020 0.18% 58,169
Mega WELLS FARGO & COMPANY/MN $1,968,647 0.18% 58,158
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension $1,929,991 0.18% 57,016
Large Janney Montgomery Scott LLC $1,927,622 0.17% 56,946
Large LAZARD ASSET MANAGEMENT LLC $1,910,900 0.17% 56,452
Mega JANE STREET GROUP, LLC $1,665,420 0.15% 49,200
Large Cambridge Investment Research Advisors, Inc. $1,643,451 0.15% 48,551
Mid RICE HALL JAMES & ASSOCIATES, LLC $1,594,808 0.14% 47,114
Mega ALLIANCEBERNSTEIN L.P. $1,503,617 0.14% 44,420
Large LOS ANGELES CAPITAL MANAGEMENT LLC $1,472,881 0.13% 43,512
Large Tidal Investments LLC $1,468,039 0.13% 43,369
Large HighTower Advisors, LLC $1,464,587 0.13% 43,267
Mega DEUTSCHE BANK AG\ Bank $1,452,772 0.13% 42,918
Mid Defiance ETFs, LLC Mutual Fund $1,429,383 0.13% 42,227
Mid Legato Capital Management LLC $1,358,095 0.12% 40,121
Mid Quadrature Capital Ltd $1,324,889 0.12% 39,140
Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. Mutual Fund $1,313,447 0.12% 38,802
Large Russell Investments Group, Ltd. $1,264,770 0.11% 37,364
Mid Merit Financial Group, LLC $1,249,673 0.11% 36,918
Large SG Americas Securities, LLC Broker-Dealer $1,197,782 0.11% 35,385
Mid KORNITZER CAPITAL MANAGEMENT INC /KS $1,183,836 0.11% 34,973
Mid Hennion & Walsh Asset Management, Inc. $1,129,066 0.10% 33,355
Large Focus Partners Wealth $1,125,884 0.10% 33,261
Large TRUIST FINANCIAL CORP $1,106,895 0.10% 32,700
Mega ROYAL BANK OF CANADA Bank $1,060,722 0.10% 31,336
Small Quantum Private Wealth, LLC $1,056,898 0.10% 31,223
Mid JOURNEY STRATEGIC WEALTH LLC $1,053,310 0.10% 31,117
Mega FRANKLIN RESOURCES INC $997,830 0.09% 29,478
Key facts CIK 880807 CUSIP 030111207 13F (30d) 3 filings 3 filers Visit website Investor relations

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