AMERICAN SUPERCONDUCTOR CORP /DE/ (AMSC) stock: insider trades, news & valuation
Heavy sellingShare price and insider trades
AMERICAN SUPERCONDUCTOR CORP /DE/ insider trading at a glance (Oct 9, 2026): in the past 12 months, 0 insiders bought $0 and 4 sold $7.8M of AMSC stock on the open market.
Get emailed when insiders cluster-buy stocks like AMSC
Free alerts the day a new cluster buy is filed, plus the Monday report of the week's biggest insider trades.
Free · unsubscribe anytime · not investment advice · see a sample issue
AMSC insider buying and selling by quarter
Open-market purchases (green, above the line) and sales (red, below), by trade date.
| Quarter | Bought | Purchases | Sold | Sales |
|---|---|---|---|---|
| Q4 2026 | — | 0 | — | 0 |
| Q3 2026 | — | 0 | — | 0 |
| Q2 2026 | — | 0 | $7.8M | 24 |
| Q1 2026 | — | 0 | $7K | 1 |
Valuation, profit and volume
Summary
Over the past 12 months, 0 AMERICAN SUPERCONDUCTOR CORP /DE/ insiders reported open-market purchases totaling $0, while 4 insiders reported sales totaling $7.8M. 23 of 25 recorded sales were made under pre-scheduled Rule 10b5-1 trading plans, which are usually less informative than discretionary sales.
AMSC earnings: how the stock reacted
Each quarterly results release (SEC 8-K Item 2.02), the trend before it, insider trades in the 30 days before, and the 2-day market reaction. “E” marks releases on the chart above.
| Release | 15 days before | Insiders, 30 days before | Reaction (2 days) | Next 30 days |
|---|---|---|---|---|
| Aug 5, 2026 | +2.9% | None | -1.6%S&P -0.4% | -10.2% |
| May 27, 2026 | -9.5% | None | -3.4%S&P +0.5% | -22.6% |
| Feb 4, 2026 | -6.8% | None | -13.5%S&P -1.7% | +6.7% |
| Nov 5, 2025 | -7.8% | None | -35.1%S&P -0.7% | -11.2% |
| Jul 30, 2025 | +6.8% | None | +30.7%S&P -0.5% | -12.2% |
| May 21, 2025 | +19.9% | None | +2.1%S&P -1.6% | +20.7% |
| Feb 5, 2025 | -9.0% | None | +35.2%S&P +0.8% | -43.8% |
| Oct 30, 2024 | +1.1% | None | +1.8%S&P -2.3% | +38.9% |
Most companies bar insiders from trading in the weeks before results, so pre-earnings purchases are rare and often made by directors or under pre-set plans. Past reactions don't predict future ones.
Insider transactions
Open-market purchases and sales.
| Filed | Insider | Type | Shares | Price | Value | Since | Score |
|---|---|---|---|---|---|---|---|
| Jun 12SEC | Laura A. DambierDirector | Sell | 4,00014,992 held (−21%) | $37.63 | $151K | -18.9% | — |
| Jun 11SEC | Daniel P McgahnCEO, President | Sell Plan | 11,5081,136,538 held (−1%) | $37.28 | $429K | -18.1% | — |
| Jun 11SEC | John W Kosiba Jr.CFO | Sell Plan | 5,026336,120 held (−1%) | $37.33 | $188K | -18.2% | — |
| Jun 11SEC | Daniel P McgahnCEO, President | Sell Plan | 4,6091,131,929 held (−0%) | $37.85 | $174K | -19.4% | — |
| Jun 11SEC | John W Kosiba Jr.CFO | Sell Plan | 1,743334,377 held (−1%) | $37.85 | $66K | -19.4% | — |
| Jun 10SEC | Daniel P McgahnCEO, President | Sell Plan | 4,9921,152,724 held (−0%) | $41.39 | $207K | -26.3% | — |
| Jun 10SEC | Daniel P McgahnCEO, President | Sell Plan | 4,6781,148,046 held (−0%) | $42.19 | $197K | -27.7% | — |
| Jun 10SEC | John W Kosiba Jr.CFO | Sell Plan | 3,286342,695 held (−1%) | $41.50 | $136K | -26.5% | — |
| Jun 10SEC | John W Kosiba Jr.CFO | Sell Plan | 1,549341,146 held (−0%) | $42.35 | $66K | -27.9% | — |
| Jun 3SEC | Daniel P McgahnCEO, President | Sell Plan | 28,5581,172,914 held (−2%) | $51.46 | $1.5M | -40.7% | — |
| Jun 3SEC | Daniel P McgahnCEO, President | Sell Plan | 27,9001,201,472 held (−2%) | $50.63 | $1.4M | -39.7% | — |
| Jun 3SEC | Daniel P McgahnCEO, President | Sell Plan | 13,7621,229,372 held (−1%) | $49.45 | $681K | -38.3% | — |
| Jun 3SEC | John W Kosiba Jr.CFO | Sell Plan | 12,036353,028 held (−3%) | $51.47 | $619K | -40.7% | — |
| Jun 3SEC | John W Kosiba Jr.CFO | Sell Plan | 12,122365,064 held (−3%) | $50.62 | $614K | -39.7% | — |
| Jun 3SEC | Daniel P McgahnCEO, President | Sell Plan | 7,0751,163,534 held (−1%) | $48.31 | $342K | -36.8% | — |
| Jun 3SEC | John W Kosiba Jr.CFO | Sell Plan | 5,704377,186 held (−1%) | $49.46 | $282K | -38.3% | — |
| Jun 3SEC | Daniel P McgahnCEO, President | Sell Plan | 4,5011,159,033 held (−0%) | $49.25 | $222K | -38.0% | — |
| Jun 3SEC | John W Kosiba Jr.CFO | Sell Plan | 3,200349,228 held (−1%) | $48.31 | $155K | -36.8% | — |
| Jun 3SEC | John W Kosiba Jr.CFO | Sell Plan | 2,638346,590 held (−1%) | $49.28 | $130K | -38.1% | — |
| Jun 3SEC | Daniel P McgahnCEO, President | Sell Plan | 2,3051,170,609 held (−0%) | $52.14 | $120K | -41.5% | — |
| Jun 3SEC | Daniel P McgahnCEO, President | Sell Plan | 8171,157,716 held (−0%) | $50.99 | $42K | -40.1% | — |
| Jun 3SEC | John W Kosiba Jr.CFO | Sell Plan | 600352,428 held (−0%) | $52.19 | $31K | -41.5% | — |
| Jun 3SEC | John W Kosiba Jr.CFO | Sell Plan | 609345,981 held (−0%) | $50.83 | $31K | -40.0% | — |
| Jun 3SEC | Daniel P McgahnCEO, President | Sell Plan | 5001,158,533 held (−0%) | $50.29 | $25K | -39.3% | — |
| Feb 26SEC | David R Oliver Jr.Director | Sell | 20060,707 held (−0%) | $34.10 | $7K | -10.5% | — |
| Nov 13SEC | David R Oliver Jr.Director | Buy | 20060,907 held (+0%) | $8.33 | $2K | +266.4% | — |
Insiders at AMERICAN SUPERCONDUCTOR CORP /DE/
| Insider | Bought | Sold | Last filing | Score |
|---|---|---|---|---|
| Daniel P McgahnCEO, President | — | $5.3M | Jun 11, 2026 | — |
| John W Kosiba Jr.CFO | — | $2.3M | Jun 11, 2026 | — |
| Laura A. DambierDirector | — | $151K | Jun 12, 2026 | — |
| David R Oliver Jr.Director | $2K | $7K | Feb 26, 2026 | — |
AMSC stock: common questions
Are AMERICAN SUPERCONDUCTOR CORP /DE/ insiders buying AMSC stock?
In the past 12 months, 0 insiders reported open-market purchases of AMSC worth $0. The latest was Director David R Oliver Jr. bought $2K of AMSC at $8.33 — first open-market purchase in our records.
Are AMERICAN SUPERCONDUCTOR CORP /DE/ insiders selling AMSC stock?
4 insiders reported sales worth $7.8M over the same period.
Where does this data come from?
Every transaction comes from Form 4 filings that insiders must submit to the SEC within two business days of a trade. We pull them from SEC EDGAR every night.
What is AMSC's 52-week range?
Over the past year AMSC has traded between $25.95 and $66.68. It last closed at $30.52 on Oct 9, 2026.