Ranked by reported Q1 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. | 4.0M | $134.8M | +6.2% | 8.350% | 0.00% |
| 2 | VANGUARD CAPITAL MANAGEMENT LLC | 2.0M | $69.0M | β | 4.276% | 0.00% |
| 3 | VANGUARD PORTFOLIO MANAGEMENT LLC | 1.7M | $57.9M | β | 3.589% | 0.00% |
| 4 | BAILLIE GIFFORD & CO | 1.4M | $49.0M | -3.9% | 3.035% | 0.05% |
| 5 | STATE STREET CORP | 1.3M | $42.7M | +5.8% | 2.644% | 0.00% |
| 6 | GEODE CAPITAL MANAGEMENT, LLC | 1.2M | $39.6M | +7.2% | 2.451% | 0.00% |
| 7 | BARROW HANLEY MEWHINNEY & STRAUSS LLC | 1.1M | $38.6M | β | 2.390% | 0.13% |
| 8 | Nuveen, LLC | 1.0M | $34.6M | +6.2% | 2.141% | 0.01% |
| 9 | OBERWEIS ASSET MANAGEMENT INC/ | 850K | $28.8M | +1.7% | 1.782% | 0.85% |
| 10 | AWM Investment Company, Inc. | 802K | $27.1M | +6.3% | 1.681% | 3.00% |
| 11 | FIRST TRUST ADVISORS LP | 778K | $26.3M | +14.0% | 1.632% | 0.02% |
| 12 | EMERALD ADVISERS, LLC | 757K | $25.6M | -0.0% | 1.588% | 0.81% |
| 13 | GOLDMAN SACHS GROUP INC | 710K | $24.0M | -9.3% | 1.488% | 0.00% |
| 14 | DIMENSIONAL FUND ADVISORS LP | 658K | $22.3M | +21.9% | 1.380% | 0.00% |
| 15 | MORGAN STANLEY | 634K | $21.5M | -10.2% | 1.329% | 0.00% |
| 16 | Telemark Asset Management, LLC | 600K | $20.3M | -3.2% | 1.258% | 1.88% |
| 17 | UBS Group AG | 600K | $20.3M | -19.4% | 1.258% | 0.00% |
| 18 | D. E. Shaw & Co., Inc. | 583K | $19.7M | +8.1% | 1.222% | 0.02% |
| 19 | ROYCE & ASSOCIATES LP | 543K | $18.4M | +40.2% | 1.138% | 0.18% |
| 20 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 532K | $18.0M | -5.3% | 1.116% | 0.00% |
| 21 | Legal & General Group Plc | 530K | $17.9M | +90.7% | 1.111% | 0.00% |
| 22 | CITADEL ADVISORS LLC | 472K | $16.0M | -49.9% | 0.989% | 0.01% |
| 23 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 447K | $15.1M | -34.6% | 0.937% | 0.01% |
| 24 | EMERALD MUTUAL FUND ADVISERS TRUST | 439K | $14.9M | +0.8% | 0.920% | 0.72% |
| 25 | BNP PARIBAS ARBITRAGE, SA | 437K | $14.8M | +429.3% | 0.916% | 0.01% |
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 Q1 2026, grouped by how each filer changed its position.
Institutions that opened a new AMSC position in Q1 2026
Institutions that fully closed their AMSC position in Q1 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 |
|---|---|---|---|---|---|---|
| Q1 2026 | 237 | +1.7% | 58.39% | +7.52 pp | $1.11B | +15% |
| Q4 2025 | 233 | 13% | 50.87% | 52.52 pp | $971M | 51% |
| Q3 2025 | 267 | +17% | 103.39% | +40.57 pp | $1.97B | +65% |
| Q2 2025 | 229 | +21% | 62.82% | +35.48 pp | $1.20B | +130% |
| Q1 2025 | 189 | +1.1% | 27.34% | 33.80 pp | $522M | 55% |
| Q4 2024 | 187 | +12% | 61.14% | 67.81 pp | $1.17B | 53% |
| Q3 2024 | 167 | +9.2% | 128.95% | +96.40 pp | $2.46B | +296% |
| Q2 2024 | 153 | β | 32.55% | β | $621M | 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 Q1 2026 13F filings, institutional ownership of American Superconductor Corporation stands at 58.4%, held across 237 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of AMSC, with approximately 3,982,650 shares worth $0.13B as of Q1 2026.
Yes β 2 widely-followed marquee investors appear among the top 25 institutional holders of AMSC, including SUSQUEHANNA INTERNATIONAL GROUP, LLP, CITADEL ADVISORS LLC.
Our composite Smart Money Score for AMSC is 66 out of 100 (Bullish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
57 institutions opened new positions in AMSC during Q1 2026, while 53 fully exited. 147 added to existing positions and 32 trimmed.
AMSC institutional ownership rose by 7.52 percentage points quarter-over-quarter, with a net change of +4 holders.
The top 10 institutions account for 46.8% of all reported 13F value in AMSC, and the top 25 account for 73.3%.
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