DEVENS, MA
AMERICAN SUPERCONDUCTOR CORP /DE/AMSC— Latest position per institution from SEC 13F filings
15
Institutional holders
29.99M
Total shares held
1.14B
Estimated value
1.50M
Avg. position size
BLACKROCK, INC.
CIK 2012383
Shares
4.10M
Value
170M
Filed
Jun 30, 2026
VANGUARD GROUP INC
CIK 102909
Shares
3.53M
Value
101.50M
Filed
Dec 31, 2025
BLACKROCK FINANCE, INC.
CIK 1364742
Shares
2.54M
Value
59.50M
Filed
Jun 30, 2024
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
2.03M
Value
84.44M
Filed
Jun 30, 2026
BARROW HANLEY MEWHINNEY & STRAUSS LLC
CIK 313028
Shares
1.70M
Value
70.73M
Filed
Jun 30, 2026
UBS GROUP AG
CIK 1610520
Shares
1.43M
Value
59.32M
Filed
Jun 30, 2026
VANGUARD PORTFOLIO MANAGEMENT LLC
CIK 2100121
Shares
1.42M
Value
58.90M
Filed
Jun 30, 2026
STATE STREET CORP
CIK 93751
Shares
1.36M
Value
56.38M
Filed
Jun 30, 2026
GOLDMAN SACHS GROUP INC
CIK 886982
Shares
1.29M
Value
53.72M
Filed
Jun 30, 2026
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
1.24M
Value
51.62M
Filed
Jun 30, 2026
FIRST TRUST ADVISORS LP
CIK 1125816
Shares
1.17M
Value
48.50M
Filed
Jun 30, 2026
ATREIDES MANAGEMENT, LP
CIK 1777813
Shares
1.04M
Value
30.05M
Filed
Dec 31, 2025
OBERWEIS ASSET MANAGEMENT INC/
CIK 937886
Shares
987.50K
Value
40.99M
Filed
Jun 30, 2026
JANE STREET GROUP, LLC
CIK 1595888
Shares
964.22K
Value
40.02M
Filed
Jun 30, 2026
AWM INVESTMENT COMPANY, INC.
CIK 1535264
Shares
951.60K
Value
39.50M
Filed
Jun 30, 2026
BAILLIE GIFFORD & CO
CIK 1088875
Shares
933.31K
Value
38.74M
Filed
Jun 30, 2026
NUVEEN ASSET MANAGEMENT, LLC
CIK 1521019
Shares
878.62K
Value
21.64M
Filed
Dec 31, 2024
EMERALD ADVISERS, LLC
CIK 1015083
Shares
843.96K
Value
35.03M
Filed
Jun 30, 2026
FULLER & THALER ASSET MANAGEMENT, INC.
CIK 1082327
Shares
809.95K
Value
48.10M
Filed
Sep 30, 2025
LEGAL & GENERAL GROUP PLC
CIK 764068
Shares
756.86K
Value
31.42M
Filed
Jun 30, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | BLACKROCK, INC. | 2012383 | 4.10M | 170M | Jun 30, 2026 |
| 2 | VANGUARD GROUP INC | 102909 | 3.53M | 101.50M | Dec 31, 2025 |
| 3 | BLACKROCK FINANCE, INC. | 1364742 | 2.54M | 59.50M | Jun 30, 2024 |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 2.03M | 84.44M | Jun 30, 2026 |
| 5 | BARROW HANLEY MEWHINNEY & STRAUSS LLC | 313028 | 1.70M | 70.73M | Jun 30, 2026 |
| 6 | UBS GROUP AG | 1610520 | 1.43M | 59.32M | Jun 30, 2026 |
| 7 | VANGUARD PORTFOLIO MANAGEMENT LLC | 2100121 | 1.42M | 58.90M | Jun 30, 2026 |
| 8 | STATE STREET CORP | 93751 | 1.36M | 56.38M | Jun 30, 2026 |
| 9 | GOLDMAN SACHS GROUP INC | 886982 | 1.29M | 53.72M | Jun 30, 2026 |
| 10 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 1.24M | 51.62M | Jun 30, 2026 |
| 11 | FIRST TRUST ADVISORS LP | 1125816 | 1.17M | 48.50M | Jun 30, 2026 |
| 12 | ATREIDES MANAGEMENT, LP | 1777813 | 1.04M | 30.05M | Dec 31, 2025 |
| 13 | OBERWEIS ASSET MANAGEMENT INC/ | 937886 | 987.50K | 40.99M | Jun 30, 2026 |
| 14 | JANE STREET GROUP, LLC | 1595888 | 964.22K | 40.02M | Jun 30, 2026 |
| 15 | AWM INVESTMENT COMPANY, INC. | 1535264 | 951.60K | 39.50M | Jun 30, 2026 |
| 16 | BAILLIE GIFFORD & CO | 1088875 | 933.31K | 38.74M | Jun 30, 2026 |
| 17 | NUVEEN ASSET MANAGEMENT, LLC | 1521019 | 878.62K | 21.64M | Dec 31, 2024 |
| 18 | EMERALD ADVISERS, LLC | 1015083 | 843.96K | 35.03M | Jun 30, 2026 |
| 19 | FULLER & THALER ASSET MANAGEMENT, INC. | 1082327 | 809.95K | 48.10M | Sep 30, 2025 |
| 20 | LEGAL & GENERAL GROUP PLC | 764068 | 756.86K | 31.42M | Jun 30, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.