American Superconductor (AMSC)
Builds grid-control, industrial power, naval protection, and wind-turbine systems.
$28.54
Pre-market+0.06 (+0.21%)
At close$28.48(−0.28%)
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Breakdown13F · 13D/G · Form 4
| Institutions293 holders · as of Jun 30, 2026 · largest filers plus last quarter's tail | ≈ 74.35% | 36.02M shares | |
| Insiders8 holders · as of Jun 12, 2026 | 3.42% | 1.65M shares | |
| Otherremainder | ≈ 22.23% | 10.77M shares |
48.44M company shares as of Sep 3, 2026 · institutions as of Jun 30, 2026 · holders as of their latest filing
This quarter's institutional total failed a plausibility check; shown: the largest filers plus last quarter's remainder.
Institutions13F, as of Jun 30, 2026
293 holders · 36.02M shares · 71 new positions · 180 increased · 76 reduced · 34 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| BlackRock, Inc. | 4.10M | 8.45% | +112.7K | Aug 7, 2026 |
| Vanguard Capital Management LLC | 2.03M | 4.20% | −5.2K | Aug 13, 2026 |
| Barrow Hanley Mewhinney & Strauss LLC | 1.70M | 3.52% | +564.2K | Aug 12, 2026 |
| UBS Group AG | 1.43M | 2.95% | +829.3K | Aug 13, 2026 |
| Vanguard Portfolio Management LLC | 1.42M | 2.93% | −292.8K | Aug 13, 2026 |
| State Street Corp | 1.36M | 2.80% | +97.2K | Aug 7, 2026 |
| Goldman Sachs Group Inc | 1.29M | 2.67% | +584.5K | Aug 14, 2026 |
| Geode Capital Management, LLC | 1.24M | 2.57% | +74.0K | Aug 12, 2026 |
Ownership statements13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| BlackRock, Inc. | 7.10% | 2.80M | 13G | Apr 17, 2025 ↗ |
| Vanguard Capital Management | 5.00% | 2.38M | 13G | Apr 29, 2026 ↗ |
Insider tradesForm 4
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| Jun 11, 2026 | Laura A. Dambierdirector | Sale | 4,000 | $37.63 | 14,992 |
| Jun 11, 2026 | Daniel P. McGahndirector, officer: Chairman, President and CEO | Sale · 2 lots | 16,117 | $37.45 | 1,131,929 |
| Jun 11, 2026 | John W. JR Kosibaofficer: SVP, CFO & Treasurer | Sale · 2 lots | 6,769 | $37.46 | 334,377 |
| Jun 8, 2026 | Daniel P. McGahndirector, officer: Chairman, President and CEO | Sale · 2 lots | 9,670 | $41.78 | 1,148,046 |
| Jun 8, 2026 | John W. JR Kosibaofficer: SVP, CFO & Treasurer | Sale · 2 lots | 4,835 | $41.77 | 341,146 |
| Feb 24, 2026 | David R. Jr Oliverdirector | Sale | 200 | $34.10 | 60,707 |
| Jun 18, 2019 | David R. Jr Oliverdirector | Purchase | 200 | $8.33 | 60,907 |
CongressHouse and Senate disclosures
Not reported.