American Superconductor
AMSC
274 hedge funds and large institutions have $1.94B invested in American Superconductor in 2025 Q3 according to their latest regulatory filings, with 73 funds opening new positions, 93 increasing their positions, 81 reducing their positions, and 29 closing their positions.
152% more first-time investments, than exits
New positions opened: 73 | Existing positions closed: 29
69% more call options, than puts
Call options by funds: $78.8M | Put options by funds: $46.5M
40% more funds holding in top 10
Funds holding in top 10: 5 → 7 (+2)
18% more funds holding
Funds holding: 232 → 274 (+42)
15% more repeat investments, than reductions
Existing positions increased: 93 | Existing positions reduced: 81
9% more capital inflows, than outflows
Capital inflows: $354M | Capital outflows: $324M
8.59% less ownership
Funds ownership: 81.01% → 72.42% (-8.6%)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Fuller & Thaler Asset Management
San Mateo,
California
|
+$40.5M |
| 2 |
D.E. Shaw & Co
New York
|
+$30.9M |
| 3 |
Arrowstreet Capital
Boston,
Massachusetts
|
+$26.2M |
| 4 |
Vanguard Group
Malvern,
Pennsylvania
|
+$25.1M |
| 5 |
Driehaus Capital Management
Chicago,
Illinois
|
+$19M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Hood River Capital Management
Palm Beach Gardens,
Florida
|
-$42.9M |
| 2 |
AIC
AWM Investment Company
New York
|
-$40.6M |
| 3 |
Citadel Advisors
Miami,
Florida
|
-$33.7M |
| 4 |
Royce & Associates
New York
|
-$22.7M |
| 5 |
Macquarie Group
Sydney, NSW 2000,
Australia
|
-$17.8M |
AMSC Hedge Fund Activity: Q3 2025 in Review
274 of the 7,649 institutional investors tracked by Wall St. Rank reported a position in American Superconductor (AMSC) for Q3 2025, worth a combined $1.94B — up 62% from $1.2B a quarter earlier.
Buyers outnumbered sellers: 73 funds opened new AMSC positions and 29 closed out — a net gain of 44 holders — while 93 added to existing stakes and 81 trimmed.
The largest buyer was Fuller & Thaler Asset Management, opening a new position worth an estimated $40.5M. The largest seller was Hood River Capital Management, exiting entirely with an estimated $42.9M sold.
- 274 institutional investors held American Superconductor (AMSC) as of Q3 2025, up from 232 in Q2 2025.
- Funds reported $1.94B of American Superconductor stock for Q3 2025, up 62% quarter-over-quarter.
- 73 funds opened new American Superconductor positions in Q3 2025 and 29 closed out, a net change of +44 holders.
- The largest American Superconductor buyer in Q3 2025 was Fuller & Thaler Asset Management, an estimated $40.5M added.
- The largest American Superconductor seller in Q3 2025 was Hood River Capital Management, an estimated $42.9M sold.
Based on aggregated 13F filings for Q3 2025.