Ranked by reported Q2 2026 13F market value
Share of total reported institutional value in AMSC held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 4.1M | $170.0M | +2.8% | 8.451% | 0.00% |
| 2 | VANGUARD CAPITAL MANAGEMENT LLC | 2.0M | $84.4M | -0.3% | 4.197% | 0.00% |
| 3 | BARROW HANLEY MEWHINNEY & STRAUSS LLC | 1.7M | $70.7M | +49.5% | 3.516% | 0.21% |
| 4 | UBS Group AG | 1.4M | $59.3M | +138.3% | 2.949% | 0.01% |
| 5 | VANGUARD PORTFOLIO MANAGEMENT LLC | 1.4M | $58.9M | -17.1% | 2.928% | 0.00% |
| 6 | STATE STREET CORP | 1.4M | $56.4M | +7.7% | 2.803% | 0.00% |
| 7 | GOLDMAN SACHS GROUP INC | 1.3M | $53.7M | +82.4% | 2.670% | 0.00% |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | 1.2M | $51.6M | +6.3% | 2.565% | 0.00% |
| 9 | FIRST TRUST ADVISORS LP | 1.2M | $48.5M | +50.1% | 2.411% | 0.03% |
| 10 | OBERWEIS ASSET MANAGEMENT INC/ | 988K | $41.0M | +16.2% | 2.038% | 0.85% |
| 11 | JANE STREET GROUP, LLC | 964K | $40.0M | +419.5% | 1.990% | 0.00% |
| 12 | AWM Investment Company, Inc. | 952K | $39.5M | +18.7% | 1.964% | 3.43% |
| 13 | BAILLIE GIFFORD & CO | 933K | $38.7M | -35.5% | 1.926% | 0.04% |
| 14 | EMERALD ADVISERS, LLC | 844K | $35.0M | +11.4% | 1.742% | 0.82% |
| 15 | Legal & General Group Plc | 757K | $31.4M | +42.8% | 1.562% | 0.01% |
| 16 | DIMENSIONAL FUND ADVISORS LP | 646K | $26.8M | -1.9% | 1.333% | 0.00% |
| 17 | MORGAN STANLEY | 636K | $26.4M | +0.3% | 1.312% | 0.00% |
| 18 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 629K | $26.1M | +18.1% | 1.297% | 0.00% |
| 19 | Nuveen, LLC | 628K | $26.1M | -38.5% | 1.297% | 0.01% |
| 20 | Telemark Asset Management, LLC | 600K | $24.9M | 0.0% | 1.238% | 1.80% |
| 21 | ROYCE & ASSOCIATES LP | 556K | $23.1M | +2.4% | 1.147% | 0.19% |
| 22 | EMERALD MUTUAL FUND ADVISERS TRUST | 539K | $22.4M | +22.8% | 1.112% | 0.79% |
| 23 | NORTHERN TRUST CORP | 434K | $18.0M | +10.3% | 0.895% | 0.00% |
| 24 | CITADEL ADVISORS LLC | 430K | $17.8M | -8.9% | 0.886% | 0.00% |
| 25 | Ranger Investment Management, L.P. | 405K | $16.8M | β | 0.836% | 1.06% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). β% of Fundβ shows how much of that investorβs total 13F portfolio is invested in AMSC β a direct measure of their conviction.
Filings activity in AMSC during Q2 2026, grouped by how each filer changed its position.
Institutions that opened a new AMSC position in Q2 2026
Institutions that fully closed their AMSC position in Q2 2026
8 quarters of 13F filings Β· Ξ columns show change vs prior quarter
| Quarter | Inst. Holders | Ξ Holders | Ownership % | Ξ Ownership | Total 13F Value | Ξ Value |
|---|---|---|---|---|---|---|
| Q2 2026 | 280 | +13% | 76.86% | +4.27 pp | $1.50B | +29% |
| Q1 2026 | 247 | +4.7% | 72.59% | 0.42 pp | $1.16B | +19% |
| Q4 2025 | 236 | 14% | 73.01% | 3.16 pp | $973M | 51% |
| Q3 2025 | 273 | +19% | 76.17% | 8.56 pp | $1.99B | +66% |
| Q2 2025 | 229 | +21% | 84.73% | +13.83 pp | $1.20B | +130% |
| Q1 2025 | 189 | +1.1% | 70.90% | 53.26 pp | $522M | 55% |
| Q4 2024 | 187 | +12% | 124.16% | 75.83 pp | $1.17B | 53% |
| Q3 2024 | 167 | β | 199.99% | β | $2.46B | β |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Ξ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying AMSC stock.
Based on Q2 2026 13F filings, institutional ownership of American Superconductor Corporation stands at 76.9%, held across 280 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of AMSC, with approximately 4,095,371 shares worth $0.17B as of Q2 2026.
Yes β 3 widely-followed marquee investors appear among the top 25 institutional holders of AMSC, including JANE STREET GROUP, LLC, SUSQUEHANNA INTERNATIONAL GROUP, LLP, CITADEL ADVISORS LLC.
Our composite Smart Money Score for AMSC is 80 out of 100 (Strong Smart Money). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
60 institutions opened new positions in AMSC during Q2 2026, while 31 fully exited. 170 added to existing positions and 41 trimmed.
AMSC institutional ownership rose by 4.27 percentage points quarter-over-quarter, with a net change of +33 holders.
The top 10 institutions account for 46.3% of all reported 13F value in AMSC, and the top 25 account for 73.8%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
American Superconductor Corporation (AMSC) Institutional Ownership