| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| VANGUARD GROUP INC | 7.4% | $101,496,469 | 3,526,632 | The Vanguard Group | 31 Dec 2025 | |||
| BlackRock, Inc. | 7.1% | -18% | $56,355,183 | -$12,648,303 | 2,799,562 | -18% | BlackRock, Inc. | 31 Mar 2025 |
| BAILLIE GIFFORD & CO | 4.2% | -22% | $33,210,273 | -$9,191,459 | 1,649,790 | -22% | BAILLIE GIFFORD & CO | 31 Dec 2024 |
As of 31 Dec 2025, 229 institutional investors reported holding 32,611,417 shares of AMERICAN SUPERCONDUCTOR CORP /DE/ - Common Stock (AMSC). This represents 68% of the company’s total 47,657,189 outstanding shares.
The largest institutional shareholders of AMERICAN SUPERCONDUCTOR CORP /DE/ - Common Stock (AMSC) together control 50% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 7.9% | 3,750,403 | +3.3% | 0% | $107,936,611 |
| VANGUARD GROUP INC | 7.4% | 3,526,632 | +20% | 0% | $101,496,470 |
| BAILLIE GIFFORD & CO | 3.2% | 1,506,841 | +5.6% | 0.04% | $43,366,884 |
| STATE STREET CORP | 2.5% | 1,192,093 | +4.9% | 0% | $34,308,437 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.3% | 1,090,710 | +1.9% | 0% | $31,396,276 |
| Atreides Management, LP | 2.2% | 1,044,193 | +35% | 0.64% | $30,051,875 |
| Nuveen, LLC | 2% | 960,968 | +16% | 0.01% | $27,656,659 |
| OBERWEIS ASSET MANAGEMENT INC/ | 1.8% | 835,900 | +26% | 0.88% | $24,057,202 |
| GOLDMAN SACHS GROUP INC | 1.6% | 782,287 | -33% | 0% | $22,514,220 |
| EMERALD ADVISERS, LLC | 1.6% | 757,568 | +45% | 0.67% | $21,802,807 |
| AWM Investment Company, Inc. | 1.6% | 754,220 | +1.2% | 2.1% | $21,706,452 |
| UBS Group AG | 1.6% | 744,563 | +284% | 0% | $21,428,523 |
| MORGAN STANLEY | 1.5% | 705,441 | +110% | 0% | $20,302,611 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 1.4% | 683,202 | -10% | 0.01% | $19,662,554 |
| FIRST TRUST ADVISORS LP | 1.4% | 682,967 | +49% | 0.01% | $19,655,790 |
| Telemark Asset Management, LLC | 1.3% | 619,900 | -10% | 1.8% | $17,840,722 |
| Qube Research & Technologies Ltd | 1.3% | 599,006 | +133% | 0.02% | $17,239,393 |
| DIMENSIONAL FUND ADVISORS LP | 1.1% | 540,253 | +15% | 0% | $15,549,050 |
| Driehaus Capital Management LLC | 1% | 499,984 | -59% | 0.1% | $14,389,540 |
| ALGERT GLOBAL LLC | 0.97% | 460,771 | +60% | 0.21% | $13,261,000 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | 0.96% | 459,786 | 0% | 0.02% | $13,233,000 |
| D. E. Shaw & Co., Inc. | 0.93% | 443,148 | -41% | 0.01% | $12,753,800 |
| EMERALD MUTUAL FUND ADVISERS TRUST | 0.91% | 435,246 | +41% | 0.61% | $12,526,380 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.81% | 387,507 | -0.19% | 0% | $11,152,458 |
| ROYCE & ASSOCIATES LP | 0.81% | 387,069 | +8.2% | 0.11% | $11,139,846 |
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2025 Q4 | 32,611,417 | $939,181,932 | -$102,817,337 | $28.78 | 229 |
| 2025 Q3 | 32,699,146 | $1,940,990,538 | +$32,935,504 | $59.39 | 270 |
| 2025 Q2 | 32,674,926 | $1,198,934,947 | +$198,037,144 | $36.69 | 228 |
| 2025 Q1 | 27,561,821 | $500,035,162 | -$3,552,043 | $18.14 | 189 |
| 2024 Q4 | 27,521,153 | $678,105,741 | +$7,292,176 | $24.63 | 190 |
| 2024 Q3 | 27,198,756 | $641,943,684 | -$3,178,845 | $23.60 | 170 |
| 2024 Q2 | 27,193,223 | $636,078,474 | +$100,747,508 | $23.39 | 154 |
| 2024 Q1 | 23,096,288 | $312,018,202 | +$95,933,897 | $13.51 | 127 |
| 2023 Q4 | 16,047,561 | $178,757,920 | +$32,158,997 | $11.14 | 98 |
| 2023 Q3 | 13,211,392 | $99,745,426 | +$1,953,457 | $7.55 | 71 |
| 2023 Q2 | 13,090,639 | $81,943,982 | -$222,130 | $6.26 | 75 |
| 2023 Q1 | 13,147,722 | $64,556,424 | +$440,557 | $4.91 | 73 |
| 2022 Q4 | 13,144,355 | $48,365,833 | -$3,622,597 | $3.68 | 74 |
| 2022 Q3 | 13,931,654 | $61,023,588 | +$2,317,476 | $4.38 | 74 |
| 2022 Q2 | 13,250,274 | $68,637,400 | -$15,464,888 | $5.18 | 81 |
| 2022 Q1 | 15,674,969 | $119,452,725 | -$11,388,520 | $7.61 | 96 |
| 2021 Q4 | 16,381,893 | $178,146,496 | -$7,328,930 | $10.88 | 99 |
| 2021 Q3 | 16,697,055 | $242,925,738 | +$3,477,984 | $14.58 | 93 |
| 2021 Q2 | 16,351,935 | $284,837,911 | +$433,500 | $17.39 | 96 |
| 2021 Q1 | 16,184,271 | $306,573,897 | -$32,714,323 | $18.96 | 99 |
| 2020 Q4 | 17,342,165 | $405,527,098 | +$91,556,015 | $23.42 | 101 |
| 2020 Q3 | 13,877,546 | $201,594,232 | +$35,621,311 | $14.48 | 83 |
| 2020 Q2 | 11,598,459 | $94,116,585 | +$5,240,209 | $8.13 | 71 |
| 2020 Q1 | 10,971,893 | $59,960,136 | +$1,361,714 | $5.48 | 68 |
| 2019 Q4 | 10,684,371 | $83,515,324 | +$3,200,524 | $7.85 | 68 |
| 2019 Q3 | 10,234,098 | $80,230,336 | +$1,185,030 | $7.84 | 70 |
| 2019 Q2 | 10,007,054 | $92,789,328 | +$1,622,214 | $9.28 | 73 |
| 2019 Q1 | 9,317,362 | $119,925,633 | +$36,933,200 | $12.86 | 73 |
| 2018 Q4 | 6,445,209 | $71,567,193 | +$14,062,538 | $11.15 | 64 |
| 2018 Q3 | 5,067,020 | $35,211,021 | +$3,132,656 | $6.95 | 53 |
| 2018 Q2 | 4,615,466 | $32,304,021 | -$2,867,788 | $7.00 | 47 |
| 2018 Q1 | 5,080,052 | $29,559,017 | -$388,303 | $5.82 | 49 |
| 2017 Q4 | 5,308,068 | $19,266,011 | -$2,642,975 | $3.63 | 46 |
| 2017 Q3 | 5,962,544 | $27,066,014 | -$3,626,838 | $4.54 | 44 |
| 2017 Q2 | 6,750,348 | $31,197,707 | +$9,049,547 | $4.62 | 50 |
| 2017 Q1 | 4,500,681 | $30,874,304 | +$6,331,488 | $6.86 | 57 |
| 2016 Q4 | 4,268,198 | $31,455,449 | +$1,781,169 | $7.37 | 54 |
| 2016 Q3 | 4,016,134 | $28,150,062 | -$2,544,337 | $7.01 | 53 |
| 2016 Q2 | 4,292,982 | $36,231,186 | +$8,919,797 | $8.44 | 61 |
| 2016 Q1 | 3,202,209 | $24,328,140 | +$2,354,492 | $7.60 | 47 |
| 2015 Q4 | 2,921,500 | $18,608,000 | +$1,235,462 | $6.37 | 33 |
| 2015 Q3 | 2,774,552 | $12,034,009 | +$392,286 | $4.33 | 37 |
| 2015 Q2 | 62,188 | $321,000 | -$203,809 | $4.09 | 8 |
| 2015 Q1 | 866,078 | $5,573,911 | +$5,573,911 | $6.43 | 35 |