Security Snapshot

AMERICAN SUPERCONDUCTOR CORP /DE/ - Common Stock (AMSC) Institutional Ownership

CUSIP: 030111207

13F Institutional Holders and Ownership History from Q1 2015 to Q1 2026

Latest Period

Q4 2025

Institutions Reporting

237

Shares (Excl. Options)

33,047,843

Price

$28.78

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Type / Class
Equity / Common Stock
Symbol
AMSC on Nasdaq
Shares outstanding
47,694,720
Price per share
$33.02
All holders as of 31 Dec 2025
Q4 2025
Total 13F shares
33,047,843
Total reported value
$951,742,537
% of total 13F portfolios
0%
Share change
-51,086
Value change
-$100,421,486
Number of holders
237
Price from insider filings
$33.02
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Quick Takeaways

  • AMSC - AMERICAN SUPERCONDUCTOR CORP /DE/ - Common Stock is tracked under CUSIP 030111207.
  • 237 institutions reported positions in Q4 2025.
  • 3 significant owners is listed from Schedule 13D/13G reporting.

What Changed

  • Holder count moved from 237 to 116 between Q4 2025 and Q1 2026.
  • Reported value moved from $951,742,537 to $470,651,376.

Why This Matters

  • You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
  • 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.

Source Evidence

Source: SEC Form 13F

Latest holder context comes from 237 institutions filings for Q4 2025.

Open SEC Evidence

Investment Quick Answers

What is CUSIP 030111207?
CUSIP 030111207 identifies AMSC - AMERICAN SUPERCONDUCTOR CORP /DE/ - Common Stock in SEC 13F datasets.

Where can I see the latest institutional holders?
Review the Q4 2025 holders report and the ownership history table below.

Significant Owners of AMERICAN SUPERCONDUCTOR CORP /DE/ - Common Stock (AMSC) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
BlackRock, Inc. 7.1% -18% $56,355,183 -$12,648,303 2,799,562 -18% BlackRock, Inc. 31 Mar 2025
VANGUARD CAPITAL MANAGEMENT LLC 5% $80,723,314 2,384,736 Vanguard Capital Management 31 Mar 2026
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, 237 institutional investors reported holding 33,047,843 shares of AMERICAN SUPERCONDUCTOR CORP /DE/ - Common Stock (AMSC). This represents 69% of the company’s total 47,694,720 outstanding shares.

Top 25 Institutional Shareholders

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

Institutional Holders of AMERICAN SUPERCONDUCTOR CORP /DE/ - Common Stock (AMSC) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2026 Q1 13,909,841 $470,651,376 +$2,443,343 $33.85 116
2025 Q4 33,047,843 $951,742,537 -$100,421,486 $28.78 237
2025 Q3 32,698,988 $1,940,981,155 +$32,935,326 $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
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