Security record · archived quarter
AMSC
American Superconductor Corporation · Industrials · Electrical Equipment & Parts
10Tracked holders
—Δ holders
4.75MShares held
$111.12MReported value
+0New positions
−0Exits
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 2024
Ownership over time
| 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 | — | — |
Who holds it · Q2 2024
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Baillie Gifford ✦ | 2.21M | — | $51.79M | 0.0% | n/c | 1 | SEC ↗ ×4 |
| 2 | Geode Capital Management ✦ (passive) | 810.90K | — | $18.97M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 3 | D. E. Shaw & Co. ✦ | 650.26K | — | $15.21M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 4 | Citadel Advisors ✦ | 380.80K | — | $8.91M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 5 | Millennium Management ✦ | 374.85K | — | $8.77M | 0.0% | n/c | 1 | SEC ↗ |
| 6 | Renaissance Technologies ✦ | 187.99K | — | $4.40M | 0.0% | n/c | 1 | SEC ↗ |
| 7 | Arrowstreet Capital ✦ | 57.01K | — | $1.33M | 0.0% | n/c | 1 | SEC ↗ |
| 8 | T. Rowe Price ✦ | 27.78K | — | $650,000 | 0.0% | n/c | 1 | SEC ↗ |
| 9 | Two Sigma Investments ✦ | 26.40K | — | $617,496 | 0.0% | n/c | 1 | SEC ↗ |
| 10 | Point72 Asset Management ✦ | 20.49K | — | $479,255 | 0.0% | n/c | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| No new tracked buyers this quarter. |
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.
Frequently co-owned
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Jul 31
SC 13G/A — VANGUARD CAPITAL MANAGEMENT LLC
Provenance: Ownership from parsed 13F common-stock positions (tracked universe, comparable sets for changes); insider rows from Forms 3/4/5; stakes from Schedules 13D/13G; every filing links to its original on SEC EDGAR.
Reporting period: Q2 2024 ·
Methodology ·
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