American Superconductor Corpora

Historical 13F Holders

Symbol
AMSC
CUSIP
030111207
All holders as of
Q2 2026
Type
Equity
Class
SHS NEW
Reported Value, Excluding Options
Total Filings

13D/G Filers

Investors who own more than 5% of a class must file a Schedule 13D or 13G. Every filing for 030111207 since 12/18/2024, newest first.

Filer % of Class Filed
Vanguard Capital Management LLC 13G/A Amendment 1 4.9% 7/31/2026
Event 6/30/2026
Vanguard Capital Management LLC 13G 5.0% 4/29/2026
Event 3/31/2026
Vanguard Group Inc 13G/A Amendment 3 0% 3/26/2026
Event 3/13/2026
Vanguard Group Inc 13G/A Amendment 2 7.4% 1/30/2026
Event 12/31/2025
BlackRock, Inc. 13G/A Amendment 2 7.1% 4/17/2025
Event 3/31/2025
Baillie Gifford & Co 13G/A Amendment 5 4.2% 2/12/2025
Event 12/31/2024
BlackRock, Inc. 13G/A Amendment 1 8.7% 2/5/2025
Event 12/31/2024
Baillie Gifford & Co 13G/A Amendment 4 5.5% 11/4/2024
Event 9/30/2024

13F Holders by Quarter

Period Filings Shares, Excl. Options Value, Excl. Options
2026 Q3 10 24.9 k $716 k
2026 Q2 295 37.5 M $1.52 B
2026 Q1 262 33.2 M $1.12 B
2025 Q4 262 33.1 M $954 M
2025 Q3 305 32.8 M $1.95 B
2025 Q2 253 32.9 M $1.21 B
2025 Q1 210 27.6 M $500 M
2024 Q4 212 27.5 M $678 M
2024 Q3 193 27.3 M $644 M
2024 Q2 176 28.1 M $657 M
2024 Q1 146 24.2 M $327 M
2023 Q4 118 16.3 M $181 M
2023 Q3 86 13.2 M $100 M
2023 Q2 85 13.1 M $81.9 M
2023 Q1 78 13.2 M $64.6 M
2022 Q4 84 13.2 M $48.7 M
2022 Q3 85 13.9 M $61.0 M
2022 Q2 98 13.3 M $68.6 M
2022 Q1 116 15.7 M $120 M
2021 Q4 118 16.4 M $179 M
2021 Q3 111 16.7 M $243 M
2021 Q2 125 16.4 M $286 M
2021 Q1 123 16.4 M $312 M
2020 Q4 131 17.9 M $439 M
2020 Q3 106 14.0 M $203 M
2020 Q2 91 11.7 M $95.1 M
2020 Q1 88 11.0 M $60.0 M
2019 Q4 89 10.9 M $85.6 M
2019 Q3 90 10.2 M $80.2 M
2019 Q2 95 10.0 M $92.9 M
2019 Q1 92 9.55 M $123 M
2018 Q4 82 6.57 M $73.0 M
2018 Q3 74 5.07 M $35.2 M
2018 Q2 69 4.65 M $32.5 M
2018 Q1 70 5.10 M $29.6 M
2017 Q4 68 5.31 M $19.3 M
2017 Q3 69 5.99 M $27.2 M
2017 Q2 76 8.14 M $37.6 M
2017 Q1 76 5.76 M $39.5 M
2016 Q4 72 4.31 M $31.7 M
2016 Q3 81 4.02 M $28.2 M
2016 Q2 88 4.29 M $36.2 M
2016 Q1 73 3.20 M $24.3 M
2015 Q4 63 2.92 M $18.6 M
2015 Q3 62 2.78 M $12.0 M
2015 Q2 66 2.77 M $14.5 M
2015 Q1 52 867 k $5.58 M