Institutional Ownership American Superconductor Corp (AMSC)
This table provides information about the institutional ownership of American Superconductor Corp (AMSC). We have compiled data on the 254 institutions that hold shares in the stock, with a total of 32.6 Million shares, which have been reported (via 13F filing form) to have a value of $1.82 Billion.
| Holding | Report Date | shares Held | Holding Value (Reported) | Last Trade | Trade History |
|---|---|---|---|---|---|
|
Black Rock Inc.
New York, NY |
Aug 13, 2024 Q2 2024 |
2,544,019
shares
|
$142 Million
0.0% of portfolio
|
Q2 2024
Added 240.9%
|
|
|
Vanguard Group Inc
Valley Forge, PA |
Aug 11, 2025 Q2 2025 |
2,447,047
shares
|
$137 Million
0.0% of portfolio
|
Q2 2025
Added 6.97%
|
|
|
Awm Investment Company, Inc.
New York, NY |
Aug 14, 2025 Q2 2025 |
1,558,478
shares
|
$87.1 Million
8.2% of portfolio
|
Q1 2025
Added 2.97%
|
|
|
Baillie Gifford & CO
|
Aug 06, 2025 Q2 2025 |
1,452,679
shares
|
$81.2 Million
0.04% of portfolio
|
Q2 2025
Reduced 4.36%
|
|
|
Hood River Capital Management LLC
Palm Beach Gardens, FL |
Aug 14, 2025 Q2 2025 |
1,168,906
shares
|
$65.3 Million
0.69% of portfolio
|
Q2 2025
Reduced 5.66%
|
|
|
Atreides Management, LP
Boston, MA |
Aug 14, 2025 Q2 2025 |
1,104,458
shares
|
$61.7 Million
1.22% of portfolio
|
Q2 2025
Added 34.03%
|
|
|
Goldman Sachs Group Inc
New York, NY |
Aug 14, 2025 Q2 2025 |
1,029,047
shares
|
$57.5 Million
0.01% of portfolio
|
Q2 2025
Added 113.51%
|
|
|
State Street Corp
Boston, MA |
Aug 14, 2025 Q2 2025 |
1,020,165
shares
|
$57 Million
0.0% of portfolio
|
Q2 2025
Added 14.62%
|
|
|
Nuveen, LLC
Charlotte, NC |
Aug 12, 2025 Q2 2025 |
997,902
shares
|
$55.8 Million
0.01% of portfolio
|
Q2 2025
Added 28.17%
|
|
|
Geode Capital Management, LLC
Boston, MA |
Aug 08, 2025 Q2 2025 |
940,111
shares
|
$52.5 Million
0.0% of portfolio
|
Q2 2025
Added 6.63%
|
|
|
Nuveen Asset Management, LLC
Chicago, IL |
Feb 14, 2025 Q4 2024 |
878,624
shares
|
$49.1 Million
0.01% of portfolio
|
Q4 2024
Reduced 14.72%
|
|
|
Driehaus Capital Management LLC
Chicago, IL |
Aug 14, 2025 Q2 2025 |
839,847
shares
|
$46.9 Million
0.3% of portfolio
|
Q2 2025
Added 0.0%
|
|
|
Macquarie Group LTD
Australia, C3 |
Aug 14, 2025 Q2 2025 |
822,179
shares
|
$46 Million
0.04% of portfolio
|
Q2 2025
Reduced 19.93%
|
|
|
Royce & Associates LP
|
Aug 11, 2025 Q2 2025 |
811,732
shares
|
$45.4 Million
0.32% of portfolio
|
Q2 2025
Reduced 6.41%
|
|
|
Ken Griffin
Citadel Advisors LLC | Chicago, Il
|
Aug 14, 2025 Q2 2025 |
689,691
shares
|
$38.5 Million
0.0% of portfolio
|
Q2 2025
Added 424.24%
|
|
|
Oberweis Asset Management Inc
Lisle, IL |
Aug 14, 2025 Q2 2025 |
668,200
shares
|
$37.3 Million
1.15% of portfolio
|
Q1 2025
Added 0.57%
|
|
|
Telemark Asset Management, LLC
Boston, MA |
May 12, 2025 Q1 2025 |
600,000
shares
|
$33.5 Million
1.57% of portfolio
|
Q2 2024
Added 50.0%
|
|
|
Morgan Stanley
New York, NY |
Aug 15, 2025 Q2 2025 |
570,356
shares
|
$31.9 Million
0.0% of portfolio
|
Q2 2025
Added 11.86%
|
|
|
Emerald Advisers, LLC
|
Aug 04, 2025 Q2 2025 |
500,054
shares
|
$27.9 Million
0.72% of portfolio
|
Q2 2025
Added 1191.5%
|
|
|
Dimensional Fund Advisors LP
Austin, TX |
Aug 12, 2025 Q2 2025 |
480,753
shares
|
$26.9 Million
0.0% of portfolio
|
Q2 2025
Reduced 28.05%
|
|
|
Wellington Management Group LLP
Boston, MA |
Aug 14, 2025 Q2 2025 |
431,589
shares
|
$24.1 Million
0.0% of portfolio
|
Q2 2025
Added 49.25%
|
|
|
Legal & General Group PLC
London, X0 |
Aug 12, 2025 Q2 2025 |
417,039
shares
|
$23.3 Million
0.0% of portfolio
|
Q2 2025
Added 14.4%
|
|
|
Essex Investment Management CO LLC
Boston, MA |
Aug 12, 2025 Q2 2025 |
346,042
shares
|
$19.3 Million
2.61% of portfolio
|
Q2 2025
Reduced 7.03%
|
|
|
Northern Trust Corp
Chicago, IL |
Aug 13, 2025 Q2 2025 |
341,549
shares
|
$19.1 Million
0.0% of portfolio
|
Q2 2025
Added 3.34%
|
|
|
Heights Capital Management, Inc
San Francisco, CA |
Aug 14, 2025 Q2 2025 |
340,102
shares
|
$19 Million
3.33% of portfolio
|
Q2 2025
New holding
|