AMSC
American Superconductor Corporation · Industrials · Electrical Equipment & Parts
Momentum inputs (comparable managers):
holder breadth +5.6% ·
share flow +15.3% ·
net new positions +5.3%
— formula
Broad accumulation — rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q3 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) | 3.63M | +6.1% | $215.54M | 0.0% | ▲ Add | 2 | SEC ↗ ×15 |
| 2 | The Vanguard Group ✦ (passive) | 2.95M | +20.6% | $175.19M | 0.0% | ▲ Add | 2 | SEC ↗ ×5 |
| 3 | Baillie Gifford ✦ | 1.43M | -1.7% | $84.77M | 0.1% | ▼ Trim | 6 | SEC ↗ ×4 |
| 4 | Goldman Sachs Group ✦ | 1.17M | — | $69.73M | 0.0% | n/c | 1 | SEC ↗ ×3 |
| 5 | State Street Global Advisors ✦ (passive) | 1.14M | +11.3% | $67.46M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 6 | Geode Capital Management ✦ (passive) | 1.07M | +13.8% | $63.55M | 0.0% | ▲ Add | 6 | SEC ↗ ×2 |
| 7 | Arrowstreet Capital ✦ | 760.46K | +221.7% | $45.16M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 8 | D. E. Shaw & Co. ✦ | 752.70K | +463.2% | $44.70M | 0.0% | ▲ Add | 6 | SEC ↗ ×2 |
| 9 | Wellington Management ✦ | 399.25K | -7.5% | $23.71M | 0.0% | ▼ Trim | 4 | SEC ↗ ×4 |
| 10 | T. Rowe Price ✦ | 396.33K | +1322.9% | $23.54M | 0.0% | ▲ Add | 6 | SEC ↗ ×2 |
| 11 | Morgan Stanley ✦ | 335.76K | — | $19.94M | 0.0% | n/c | 1 | SEC ↗ ×9 |
| 12 | Renaissance Technologies ✦ | 323.99K | New | $19.24M | 0.0% | New | 1 | SEC ↗ |
| 13 | JPMorgan Chase ✦ | 229.78K | — | $13.65M | 0.0% | n/c | 1 | SEC ↗ ×10 |
| 14 | AQR Capital Management ✦ | 168.75K | -0.1% | $10.02M | 0.0% | ▼ Trim | 5 | SEC ↗ ×5 |
| 15 | Millennium Management ✦ | 122.50K | -51.4% | $7.28M | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 16 | Two Sigma Investments ✦ | 121.62K | -1.0% | $7.22M | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 17 | Fidelity (FMR) ✦ | 100.84K | +1254.3% | $5.99M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 18 | Point72 Asset Management ✦ | 33.22K | -27.2% | $1.97M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 19 | Citadel Advisors ✦ | 14.82K | -97.8% | $880,219 | 0.0% | ▼ Trim | 6 | SEC ↗ ×2 |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Renaissance Technologies | $19.24M | 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.