AMSC
American Superconductor Corporation · Industrials · Electrical Equipment & Parts
Momentum inputs (comparable managers):
holder breadth +7.1% ·
share flow +11.6% ·
net new positions +6.7%
— formula
Broad accumulation — rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 2025
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 96 | +4 | 22.82M | $946.45M | +10 | −8 |
| Q1 2026 | 97 | +2 | 21.85M | $738.85M | +12 | −10 |
| Q4 2025 | 95 | -1 | 24.00M | $691.45M | — | −1 |
| Q3 2025 | 19 | +1 | 15.15M | $899.55M | +1 | — |
| Q2 2025 | 15 | +1 | 11.40M | $418.12M | +1 | — |
| Q1 2025 | 11 | 0 | 4.33M | $78.61M | +1 | −1 |
| Q4 2024 | 11 | 0 | 5.01M | $123.30M | +2 | −2 |
| Q3 2024 | 10 | 0 | 4.09M | $96.55M | +2 | −2 |
| Q2 2024 | 10 | — | 4.75M | $111.12M | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 3.42M | — | $125.48M | 0.0% | n/c | 1 | SEC ↗ ×15 |
| 2 | The Vanguard Group ✦ (passive) | 2.45M | — | $89.78M | 0.0% | n/c | 1 | SEC ↗ ×5 |
| 3 | Baillie Gifford ✦ | 1.45M | -4.4% | $53.30M | 0.0% | ▼ Trim | 5 | SEC ↗ ×4 |
| 4 | State Street Global Advisors ✦ (passive) | 1.02M | +14.6% | $37.43M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 5 | Geode Capital Management ✦ (passive) | 940.11K | +6.6% | $34.50M | 0.0% | ▲ Add | 5 | SEC ↗ ×2 |
| 6 | Citadel Advisors ✦ | 689.69K | +424.2% | $25.30M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 7 | Wellington Management ✦ | 431.59K | +49.2% | $15.84M | 0.0% | ▲ Add | 3 | SEC ↗ ×4 |
| 8 | Millennium Management ✦ | 251.81K | +11.6% | $9.24M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 9 | Arrowstreet Capital ✦ | 236.40K | New | $8.67M | 0.0% | New | 1 | SEC ↗ |
| 10 | AQR Capital Management ✦ | 168.89K | -20.0% | $6.20M | 0.0% | ▼ Trim | 4 | SEC ↗ ×5 |
| 11 | D. E. Shaw & Co. ✦ | 133.64K | +78.2% | $4.90M | 0.0% | ▲ Add | 5 | SEC ↗ ×2 |
| 12 | Two Sigma Investments ✦ | 122.85K | +183.3% | $4.51M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 13 | Point72 Asset Management ✦ | 45.66K | +7.6% | $1.68M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 14 | T. Rowe Price ✦ | 27.85K | +14.7% | $1.02M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 15 | Fidelity (FMR) ✦ | 7.45K | — | $273,192 | 0.0% | n/c | 1 | SEC ↗ ×2 |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Arrowstreet Capital | $8.67M | 0.0% |
Exited
| No tracked exits this quarter. |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 240 holders, 33.03M shares, $1.09B reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.