AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC
CIK 0000880807 · CUSIP 030111207
Quarter-end disclosures, not live holdings.
Top 20 institutions
Weight means this stock's share of the manager's own portfolio.
| # | Manager | Value | Manager weight | Change vs prior | Source | |
|---|---|---|---|---|---|---|
| 01 | BlackRock, Inc. CIK 2012383 · View history | $134.81M 3,982,650 shares | 0.00% | +232.25K(+6.20%)Added | SEC filing ↗ May 13, 2026 | ▾ |
| 02 | VANGUARD CAPITAL MANAGEMENT LLC CIK 2100119 · Amended · View history | $69.04M 2,039,468 shares | 0.00% | — | SEC filing ↗ May 15, 2026 | ▾ |
| 03 | VANGUARD PORTFOLIO MANAGEMENT LLC CIK 2100121 · Amended · View history | $57.94M 1,711,677 shares | 0.00% | — | SEC filing ↗ May 8, 2026 | ▾ |
| 04 | BAILLIE GIFFORD & CO CIK 1088875 · View history | $49.00M 1,447,419 shares | 0.05% | -59.42K(-3.90%)Reduced | SEC filing ↗ May 8, 2026 | ▾ |
| 05 | STATE STREET CORP CIK 93751 · View history | $42.69M 1,261,071 shares | 0.00% | +68.98K(+5.80%)Added | SEC filing ↗ May 15, 2026 | ▾ |
| 06 | GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history | $39.58M 1,169,152 shares | 0.00% | +78.44K(+7.20%)Added | SEC filing ↗ May 15, 2026 | ▾ |
| 07 | BARROW HANLEY MEWHINNEY & STRAUSS LLC CIK 313028 · View history | $38.58M 1,139,793 shares | 0.13% | +1.14MNew | SEC filing ↗ May 13, 2026 | ▾ |
| 08 | Nuveen, LLC CIK 1871926 · View history | $34.56M 1,020,947 shares | 0.01% | +59.98K(+6.20%)Added | SEC filing ↗ Apr 30, 2026 | ▾ |
| 09 | OBERWEIS ASSET MANAGEMENT INC/ CIK 937886 · View history | $28.77M 849,900 shares | 0.85% | +14.00K(+1.70%)Added | SEC filing ↗ May 15, 2026 | ▾ |
| 10 | AWM Investment Company, Inc. CIK 1535264 · View history | $27.13M 801,604 shares | 3.00% | +47.38K(+6.30%)Added | SEC filing ↗ May 15, 2026 | ▾ |
| 11 | FIRST TRUST ADVISORS LP CIK 1125816 · View history | $26.34M 778,268 shares | 0.02% | +95.30K(+14.00%)Added | SEC filing ↗ May 13, 2026 | ▾ |
| 12 | EMERALD ADVISERS, LLC CIK 1015083 · View history | $25.64M 757,404 shares | 0.81% | -164(0.00%)Reduced | SEC filing ↗ May 4, 2026 | ▾ |
| 13 | GOLDMAN SACHS GROUP INC CIK 886982 · View history | $24.02M 709,504 shares | 0.00% | -72.78K(-9.30%)Reduced | SEC filing ↗ May 15, 2026 | ▾ |
| 14 | DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history | $22.28M 658,297 shares | 0.00% | +118.04K(+21.80%)Added | SEC filing ↗ May 7, 2026 | ▾ |
| 15 | MORGAN STANLEY CIK 895421 · View history | $21.46M 633,841 shares | 0.00% | -71.60K(-10.10%)Reduced | SEC filing ↗ May 15, 2026 | ▾ |
| 16 | Telemark Asset Management, LLC CIK 1420816 · View history | $20.31M 600,000 shares | 1.88% | -19.90K(-3.20%)Reduced | SEC filing ↗ May 12, 2026 | ▾ |
| 17 | UBS Group AG CIK 1610520 · View history | $20.30M 599,821 shares | 0.00% | -144.74K(-19.40%)Reduced | SEC filing ↗ May 5, 2026 | ▾ |
| 18 | D. E. Shaw & Co., Inc. CIK 1009207 · View history | $19.21M 567,574 shares | 0.02% | +124.43K(+28.10%)Added | SEC filing ↗ May 15, 2026 | ▾ |
| 19 | ROYCE & ASSOCIATES LP CIK 906304 · View history | $18.37M 542,778 shares | 0.18% | +155.71K(+40.20%)Added | SEC filing ↗ May 12, 2026 | ▾ |
| 20 | Legal & General Group Plc CIK 764068 · View history | $17.94M 530,131 shares | 0.00% | +252.10K(+90.70%)Added | SEC filing ↗ May 8, 2026 | ▾ |
Showing 20 / 245 institutions. The complete set is available through the API.
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