AMSCNasdaqMotors & GeneratorsFiscal year ends March 31
AMERICAN SUPERCONDUCTOR CORP /DE/
Financials through Q1 FY2026, quarter ended Jun 30, 2026Last filing: 10-Q on Aug 5, 2026
$25.68+0.01 (+0.04%)
Close on Oct 19, 2026
- Market cap
- $1.21B
- P/E (TTM)
- 8.5
- Dividend yield
- –
Ownership
Institutional holdings as of Jun 30, 2026, from 13F filings
Held by institutions
73.1%
35M of 48M shares
Institutional holders
278
68 new, 30 sold out
Net institutional buying
2M
In Q2 2026
Insider trades, 12 months
0 buys · 25 sales
Net sold $7.80M
Shares held by institutions
Holders of more than 5%
Latest Schedule 13D (active) or 13G (passive) filed by each holder
| Holder | Shares | % of class | Filing | As of |
|---|---|---|---|---|
| BlackRock, Inc. | 2,799,562 | 7.10% | 13G (passive) amendment | Mar 31, 2025 |
Top institutional holders
13F holdings as of Jun 30, 2026
| Holder | Shares | % of AMSC | Value | Change | % of portfolio |
|---|---|---|---|---|---|
| BlackRock, Inc. | 4,095,371 | 8.45% | $170.00M | +112,721 | 0.00% |
| Vanguard Capital Management LLC | 2,034,219 | 4.20% | $84.44M | −5,249 | 0.00% |
| Barrow Hanley Mewhinney & Strauss LLC | 1,704,006 | 3.52% | $70.73M | +564,213 | 0.21% |
| UBS Group AG | 1,429,090 | 2.95% | $59.32M | +829,269 | 0.01% |
| Vanguard Portfolio Management LLC | 1,418,863 | 2.93% | $58.90M | −292,814 | 0.00% |
| State Street Corp | 1,358,225 | 2.80% | $56.38M | +97,154 | 0.00% |
| Goldman Sachs Group Inc | 1,294,047 | 2.67% | $53.72M | +584,543 | 0.00% |
| Geode Capital Management, LLC | 1,243,198 | 2.57% | $51.62M | +74,046 | 0.00% |
| First Trust Advisors LP | 1,168,424 | 2.41% | $48.50M | +390,156 | 0.03% |
| Oberweis Asset Management Inc/ | 987,500 | 2.04% | $40.99M | +137,600 | 0.85% |
| AWM Investment Company, Inc. | 951,604 | 1.96% | $39.50M | +150,000 | 3.43% |
| Baillie Gifford & Co | 933,308 | 1.93% | $38.74M | −514,111 | 0.04% |
| Emerald Advisers, LLC | 843,956 | 1.74% | $35.03M | +86,552 | 0.82% |
| Legal & General Group Plc | 756,863 | 1.56% | $31.42M | +226,732 | 0.01% |
| Dimensional Fund Advisors LP | 645,991 | 1.33% | $26.81M | −12,306 | 0.00% |
| Morgan Stanley | 635,833 | 1.31% | $26.39M | +1,992 | 0.00% |
| Nuveen, LLC | 628,406 | 1.30% | $26.09M | −392,541 | 0.01% |
| Telemark Asset Management, LLC | 600,000 | 1.24% | $24.91M | – | 1.80% |
| Royce & Associates LP | 555,821 | 1.15% | $23.07M | +13,043 | 0.19% |
| Emerald Mutual Fund Advisers Trust | 538,955 | 1.11% | $22.37M | +100,080 | 0.79% |
Institutional buying and selling by quarter
Positions opened, added to, reduced and closed by 13F filers
| Quarter | Holders | Shares held | % of shares | New / added | Reduced / closed | Shares bought | Shares sold |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 278 | 35M | 73.1% | 68 / 108 | 77 / 30 | 7M | 5M |
| Q1 2026 | 244 | 33M | 68.5% | 55 / 100 | 61 / 44 | 9M | 6M |
| Q4 2025 | 239 | 33M | 68.3% | 41 / 105 | 65 / 70 | 7M | 6M |
| Q3 2025 | 272 | 33M | 67.7% | 71 / 92 | 82 / 29 | 7M | 7M |
| Q2 2025 | 232 | 33M | 67.6% | 70 / 94 | 48 / 26 | 7M | 2M |
| Q1 2025 | 189 | 28M | 56.9% | 39 / 62 | 63 / 39 | 4M | 3M |
| Q4 2024 | 191 | 28M | 56.8% | 55 / 58 | 52 / 31 | 4M | 4M |
| Q3 2024 | 171 | 27M | 56.3% | 49 / 47 | 51 / 32 | 8M | 5M |
| Q2 2024 | 155 | 27M | 56.3% | 50 / 45 | 39 / 23 | 8M | 5M |
| Q1 2024 | 128 | 24M | 49.9% | 43 / 41 | 23 / 14 | 9M | 1M |
| Q4 2023 | 99 | 16M | 33.5% | 34 / 23 | 27 / 7 | 4M | 1M |
| Q3 2023 | 72 | 13M | 27.3% | 13 / 28 | 18 / 18 | 3M | 3M |
Top mutual fund and ETF holders
Latest monthly portfolio reports (Form N-PORT)
| Fund | Shares | % of AMSC | Value | % of fund | As of |
|---|---|---|---|---|---|
| Vanguard Total Stock Market Index Fund | 1,441,062 | 2.97% | $59.82M | 0.00% | Jun 30, 2026 |
| iShares Russell 2000 ETF | 1,222,695 | 2.52% | $50.75M | 0.06% | Jun 30, 2026 |
| Oberweis Micro-Cap Fund | 925,300 | 1.91% | $38.41M | 2.38% | Jun 30, 2026 |
| First Trust NASDAQ Clean Edge Smart Grid Infrastructure Index Fund | 609,096 | 1.26% | $25.28M | 0.21% | Jun 30, 2026 |
| Vanguard Extended Market Index Fund | 546,978 | 1.13% | $22.71M | 0.02% | Jun 30, 2026 |
| Fidelity Small Cap Index Fund | 516,000 | 1.07% | $15.15M | 0.04% | Jul 31, 2026 |
| American Beacon Small Cap Value Fund | 495,426 | 1.02% | $14.55M | 0.39% | Jul 31, 2026 |
| iShares Russell 2000 Growth ETF | 435,023 | 0.90% | $18.06M | 0.12% | Jun 30, 2026 |
| Vanguard Strategic Equity Fund | 417,714 | 0.86% | $17.34M | 0.14% | Jun 30, 2026 |
| Nuveen Quant Small Cap Equity Fund | 333,680 | 0.69% | $9.80M | 0.24% | Jul 31, 2026 |
| Emerald Growth Fund | 322,394 | 0.67% | $9.47M | 0.64% | Jul 31, 2026 |
| Vanguard Explorer Fund | 312,267 | 0.64% | $9.17M | 0.04% | Jul 31, 2026 |
| Emerald Growth Fund | 256,897 | 0.53% | $13.75M | 0.98% | Apr 30, 2026 |
| Fidelity Extended Market Index Fund | 246,657 | 0.51% | $12.56M | 0.03% | May 31, 2026 |
| Vanguard Russell 2000 Index Fund | 236,706 | 0.49% | $12.06M | 0.07% | May 31, 2026 |
Officers, directors and major owners
People who filed Forms 3, 4 or 5 in the last two years
| Name | Role | Shares owned | % of shares | Latest filing |
|---|---|---|---|---|
| Daniel P. McGahn | Chairman, President and CEO, Director | 1,149,882 | 2.37% | Jun 11, 2026 |
| John W. Kosiba JR | SVP, CFO & Treasurer | 334,748 | 0.69% | Jun 11, 2026 |
| Barbara G. Littlefield | Director | 37,034 | 0.08% | Sep 21, 2026 |
| Laura A. Dambier | Director | 14,992 | 0.03% | Jun 12, 2026 |
| Arthur H. House | Director | 51,779 | 0.11% | Apr 7, 2026 |
| David R. Oliver Jr | Director | 63,823 | 0.13% | Apr 7, 2026 |
| Margaret D. Klein | Director | 19,492 | 0.04% | Apr 7, 2026 |
| Terence Robert Donnelly | Director | 2,665 | 0.01% | Apr 7, 2026 |
Insider trades
Common stock transactions reported on Form 4, newest first
| Insider | Date | Transaction | Shares | Price | Value | Shares after |
|---|---|---|---|---|---|---|
| Barbara G. Littlefield Director | Sep 18, 2026 | Award | +1,607 | – | – | 37,034 |
| Laura A. Dambier Director | Jun 11, 2026 | Sale | −4,000 | $37.63 | $150.52K | 14,992 |
| John W. Kosiba JR SVP, CFO & Treasurer | Jun 11, 2026 | Sale(10b5-1 plan) | −1,743 | $37.85 | $65.97K | 334,377 |
| John W. Kosiba JR SVP, CFO & Treasurer | Jun 11, 2026 | Sale(10b5-1 plan) | −5,026 | $37.33 | $187.62K | 336,120 |
| Daniel P. McGahn Chairman, President and CEO, Director | Jun 11, 2026 | Sale(10b5-1 plan) | −11,508 | $37.28 | $429.02K | 1,136,538 |
| Daniel P. McGahn Chairman, President and CEO, Director | Jun 11, 2026 | Sale(10b5-1 plan) | −4,609 | $37.85 | $174.45K | 1,131,929 |
| Daniel P. McGahn Chairman, President and CEO, Director | Jun 8, 2026 | Sale(10b5-1 plan) | −4,678 | $42.19 | $197.36K | 1,148,046 |
| Daniel P. McGahn Chairman, President and CEO, Director | Jun 8, 2026 | Sale(10b5-1 plan) | −4,992 | $41.39 | $206.62K | 1,152,724 |
| John W. Kosiba JR SVP, CFO & Treasurer | Jun 8, 2026 | Sale(10b5-1 plan) | −1,549 | $42.35 | $65.60K | 341,146 |
| John W. Kosiba JR SVP, CFO & Treasurer | Jun 8, 2026 | Sale(10b5-1 plan) | −3,286 | $41.50 | $136.37K | 342,695 |
| John W. Kosiba JR SVP, CFO & Treasurer | Jun 3, 2026 | Sale(10b5-1 plan) | −3,200 | $48.31 | $154.59K | 349,228 |
| John W. Kosiba JR SVP, CFO & Treasurer | Jun 3, 2026 | Sale(10b5-1 plan) | −609 | $50.83 | $30.96K | 345,981 |
| John W. Kosiba JR SVP, CFO & Treasurer | Jun 3, 2026 | Sale(10b5-1 plan) | −2,638 | $49.28 | $130.00K | 346,590 |
| Daniel P. McGahn Chairman, President and CEO, Director | Jun 3, 2026 | Sale(10b5-1 plan) | −817 | $50.99 | $41.66K | 1,157,716 |
| Daniel P. McGahn Chairman, President and CEO, Director | Jun 3, 2026 | Sale(10b5-1 plan) | −500 | $50.29 | $25.15K | 1,158,533 |
| Daniel P. McGahn Chairman, President and CEO, Director | Jun 3, 2026 | Sale(10b5-1 plan) | −7,075 | $48.31 | $341.79K | 1,163,534 |
| Daniel P. McGahn Chairman, President and CEO, Director | Jun 3, 2026 | Sale(10b5-1 plan) | −4,501 | $49.25 | $221.67K | 1,159,033 |
| John W. Kosiba JR SVP, CFO & Treasurer | Jun 2, 2026 | Sale(10b5-1 plan) | −12,122 | $50.62 | $613.62K | 365,064 |
| John W. Kosiba JR SVP, CFO & Treasurer | Jun 2, 2026 | Sale(10b5-1 plan) | −12,036 | $51.47 | $619.49K | 353,028 |
| John W. Kosiba JR SVP, CFO & Treasurer | Jun 2, 2026 | Sale(10b5-1 plan) | −600 | $52.19 | $31.31K | 352,428 |
| John W. Kosiba JR SVP, CFO & Treasurer | Jun 2, 2026 | Sale(10b5-1 plan) | −5,704 | $49.46 | $282.12K | 377,186 |
| Daniel P. McGahn Chairman, President and CEO, Director | Jun 2, 2026 | Sale(10b5-1 plan) | −2,305 | $52.14 | $120.18K | 1,170,609 |
| Daniel P. McGahn Chairman, President and CEO, Director | Jun 2, 2026 | Sale(10b5-1 plan) | −28,558 | $51.46 | $1.47M | 1,172,914 |
| Daniel P. McGahn Chairman, President and CEO, Director | Jun 2, 2026 | Sale(10b5-1 plan) | −27,900 | $50.63 | $1.41M | 1,201,472 |
| Daniel P. McGahn Chairman, President and CEO, Director | Jun 2, 2026 | Sale(10b5-1 plan) | −13,762 | $49.45 | $680.53K | 1,229,372 |
| John W. Kosiba JR SVP, CFO & Treasurer | Jun 1, 2026 | Award | +30,000 | – | – | 382,890 |
| Daniel P. McGahn Chairman, President and CEO, Director | Jun 1, 2026 | Award | +60,000 | – | – | 1,243,134 |
| Terence Robert Donnelly Director | Apr 3, 2026 | Award | +2,665 | – | – | 2,665 |
| David R. Oliver Jr Director | Apr 3, 2026 | Award | +3,116 | – | – | 63,823 |
| Barbara G. Littlefield Director | Apr 3, 2026 | Award | +3,116 | – | – | 35,427 |
| Arthur H. House Director | Apr 3, 2026 | Award | +3,116 | – | – | 51,779 |
| Laura A. Dambier Director | Apr 3, 2026 | Award | +3,116 | – | – | 18,992 |
| Margaret D. Klein Director | Apr 3, 2026 | Award | +3,116 | – | – | 19,492 |
| David R. Oliver Jr Director | Feb 24, 2026 | Sale | −200 | $34.10 | $6.82K | 60,707 |
| Arthur H. House Director | Aug 8, 2025 | Sale | −9,703 | $50.92 | $494.08K | 48,663 |
| Arthur H. House Director | Aug 6, 2025 | Option exercise | +9,703 | $6.80 | $65.98K | 58,366 |
| John W. Kosiba JR SVP, CFO & Treasurer | Aug 4, 2025 | Sale | −15,740 | $55.13 | $867.75K | 352,890 |
| John W. Kosiba JR SVP, CFO & Treasurer | Aug 4, 2025 | Sale | −34,260 | $54.34 | $1.86M | 368,630 |
| John W. Kosiba JR SVP, CFO & Treasurer | Aug 4, 2025 | Sale | −9,843 | $55.26 | $543.92K | 0 |
| Daniel P. McGahn Chairman, President and CEO, Director | Aug 4, 2025 | Sale | −73,105 | $54.26 | $3.97M | 1,210,877 |
| Daniel P. McGahn Chairman, President and CEO, Director | Aug 4, 2025 | Sale | −27,743 | $55.11 | $1.53M | 1,183,134 |
| Daniel P. McGahn Chairman, President and CEO, Director | Jun 11, 2025 | Sale(10b5-1 plan) | −500 | $29.09 | $14.55K | 1,283,982 |
| Daniel P. McGahn Chairman, President and CEO, Director | Jun 11, 2025 | Sale(10b5-1 plan) | −12,315 | $28.56 | $351.72K | 1,284,482 |
| John W. Kosiba JR SVP, CFO & Treasurer | Jun 11, 2025 | Sale(10b5-1 plan) | −300 | $29.08 | $8.72K | 402,890 |
| John W. Kosiba JR SVP, CFO & Treasurer | Jun 11, 2025 | Sale(10b5-1 plan) | −6,342 | $28.55 | $181.06K | 403,190 |
| Daniel P. McGahn Chairman, President and CEO, Director | Jun 6, 2025 | Sale(10b5-1 plan) | −7,689 | $31.82 | $244.66K | 1,296,797 |
| John W. Kosiba JR SVP, CFO & Treasurer | Jun 6, 2025 | Sale(10b5-1 plan) | −4,744 | $31.83 | $151.00K | 409,532 |
| John W. Kosiba JR SVP, CFO & Treasurer | May 27, 2025 | Sale(10b5-1 plan) | −10,097 | $25.55 | $257.98K | 454,179 |
| John W. Kosiba JR SVP, CFO & Treasurer | May 27, 2025 | Sale(10b5-1 plan) | −39,903 | $26.61 | $1.06M | 414,276 |
| Daniel P. McGahn Chairman, President and CEO, Director | May 27, 2025 | Sale(10b5-1 plan) | −98,149 | $26.60 | $2.61M | 1,304,486 |
| Daniel P. McGahn Chairman, President and CEO, Director | May 27, 2025 | Sale(10b5-1 plan) | −24,506 | $25.55 | $626.13K | 1,402,635 |
| Daniel P. McGahn Chairman, President and CEO, Director | May 20, 2025 | Sale(10b5-1 plan) | −12,815 | $24.49 | $313.84K | 1,427,141 |
| John W. Kosiba JR SVP, CFO & Treasurer | May 20, 2025 | Sale(10b5-1 plan) | −11,860 | $24.50 | $290.57K | 464,276 |
| John W. Kosiba JR SVP, CFO & Treasurer | May 15, 2025 | Award | +120,000 | – | – | 476,136 |
| Daniel P. McGahn Chairman, President and CEO, Director | May 15, 2025 | Award | +240,000 | – | – | 1,439,956 |
| Laura A. Dambier Director | Apr 3, 2025 | Award | +2,639 | – | – | 15,876 |
| David R. Oliver Jr Director | Apr 3, 2025 | Award | +2,639 | – | – | 60,707 |
| Margaret D. Klein Director | Apr 3, 2025 | Award | +2,639 | – | – | 15,876 |
| Barbara G. Littlefield Director | Apr 3, 2025 | Award | +2,639 | – | – | 32,311 |
| Arthur H. House Director | Apr 3, 2025 | Award | +2,639 | – | – | 48,663 |
Awards, option exercises, tax withholding and gifts are shown alongside open-market buys and sales. Each name links to the filing on SEC EDGAR.
Planned insider sales
Notices of proposed sale filed on Form 144 before shares are sold
| Seller | Filed | Shares | Market value | Planned sale | Acquired through |
|---|---|---|---|---|---|
| Kosiba John Officer | Jun 11, 2026 | 6,769 | $253.58K | Jun 11, 2026 | Restricted Stock |
| McGahn Daniel Officer, Director | Jun 11, 2026 | 16,117 | $603.50K | Jun 11, 2026 | Restricted Stock |
| Laura A. Dambier Director | Jun 10, 2026 | 4,000 | $160.85K | Jun 10, 2026 | Restricted Stock Award |
| McGahn Daniel Officer, Director | Jun 8, 2026 | 9,670 | $404.00K | Jun 8, 2026 | Restricted Stock |
| Kosiba John Officer | Jun 8, 2026 | 4,835 | $201.97K | Jun 8, 2026 | Restricted Stock |
| Kosiba John Officer | Jun 3, 2026 | 6,447 | $315.55K | Jun 3, 2026 | Restricted Stock |
| McGahn Daniel Officer, Director | Jun 3, 2026 | 12,893 | $630.27K | Jun 3, 2026 | Restricted Stock |
| Kosiba John Officer | Jun 2, 2026 | 30,462 | $1.55M | Jun 2, 2026 | Performance Shares |
| McGahn Daniel Officer, Director | Jun 2, 2026 | 72,525 | $3.68M | Jun 2, 2026 | Performance Shares |
| H. House Arthur Director | Aug 8, 2025 | 9,703 | $493.45K | Aug 8, 2025 | NQ Stock Option |
| McGahn Daniel Officer, Director | Aug 4, 2025 | 100,849 | $5.50M | Aug 4, 2025 | Restricted Stock |
| Kosiba John Officer | Aug 4, 2025 | 50,000 | $2.73M | Aug 4, 2025 | Restricted Stock |
| McGahn Daniel Officer, Director | Jun 11, 2025 | 12,815 | $366.24K | Jun 11, 2025 | Restricted Stock |
| Kosiba John Jr. Officer | Jun 11, 2025 | 6,642 | $189.78K | Jun 11, 2025 | Restricted Stock |
| Kosiba John Jr. Officer | Jun 6, 2025 | 4,744 | $151.01K | Jun 6, 2025 | Restricted Stock |