AMERICAN SUPERCONDUCTOR CORP /DE/ (AMSC)
Data as of , from SEC Form 4 filings.
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Laura A. DambierOpen-market sale$151K- John W. Kosiba Jr. - OfficerOpen-market sale$188K
About AMERICAN SUPERCONDUCTOR CORP /DE/ (AMSC)
American Superconductor Corp generates the ideas, technologies, and solutions that meet the world's demand for smarter, cleaner, and energy. Through its Windtec Solutions, the company enables manufacturers to launch wind turbines quickly, effectively, and profitably. Through its Gridtec Solutions, the company provides engineering planning services and grid systems that optimize network reliability, efficiency, and performance. The company's segment includes Grid and Wind. It generates maximum revenue from the Grid segment.
- DEVENS, MA
- 1,195
- 1991
- XNAS
AMSC Form 4 activity by transaction type, last 90 days
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Grant or award | 1 | 1,607 |
Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.
AMSC insider transactions (Form 4)
4622 Form 4 filings on record, the earliest from Oct 1, 2024, newest first.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
 Barbara G. Littlefield - Director | Grant or award | Common Stock | 1,607 | $0.00 | - | |
| Laura A. Dambier | Open-market sale | Common Stock | 4,000 | $37.63 | $151K | |
| John W. Kosiba Jr. - Officer | Open-market sale | Common Stock | 5,026 | $37.33 footnote F2 | $188K | |
| John W. Kosiba Jr. - Officer | Open-market sale | Common Stock | 1,743 | $37.85 footnote F3 | $66K | |
| ||||||
 Daniel P. McGahn - Officer | Open-market sale | Common Stock | 4,609 | $37.85 footnote F3 | $174K | |
| Daniel P. McGahn - Officer | Open-market sale | Common Stock | 11,508 | $37.28 footnote F2 | $429K | |
| ||||||
| John W. Kosiba Jr. - Officer | Open-market sale | Common Stock | 3,286 | $41.50 footnote F2 | $136K | |
| John W. Kosiba Jr. - Officer | Open-market sale | Common Stock | 1,549 | $42.35 footnote F3 | $66K | |
| ||||||
| Daniel P. McGahn - Officer | Open-market sale | Common Stock | 4,992 | $41.39 footnote F2 | $207K | |
| Daniel P. McGahn - Officer | Open-market sale | Common Stock | 4,678 | $42.19 footnote F3 | $197K | |
| ||||||
| John W. Kosiba Jr. - Officer | Grant or award | Common Stock | 30,000 footnote F1 | $0.00 | - | |
| John W. Kosiba Jr. - Officer | Open-market sale | Common Stock | 5,704 | $49.46 footnote F3 | $282K | |
| John W. Kosiba Jr. - Officer | Open-market sale | Common Stock | 12,122 | $50.62 footnote F4 | $614K | |
| John W. Kosiba Jr. - Officer | Open-market sale | Common Stock | 12,036 | $51.47 footnote F5 | $619K | |
| John W. Kosiba Jr. - Officer | Open-market sale | Common Stock | 600 | $52.19 footnote F6 | $31K | |
| John W. Kosiba Jr. - Officer | Open-market sale | Common Stock | 3,200 | $48.31 footnote F7 | $155K | |
| John W. Kosiba Jr. - Officer | Open-market sale | Common Stock | 2,638 | $49.28 footnote F8 | $130K | |
| John W. Kosiba Jr. - Officer | Open-market sale | Common Stock | 609 | $50.83 footnote F9 | $31K | |
| ||||||
| Daniel P. McGahn - Officer | Open-market sale | Common Stock | 7,075 | $48.31 footnote F7 | $342K | |
| Daniel P. McGahn - Officer | Open-market sale | Common Stock | 4,501 | $49.25 footnote F8 | $222K | |
| Daniel P. McGahn - Officer | Open-market sale | Common Stock | 500 | $50.29 footnote F9 | $25K | |
| Daniel P. McGahn - Officer | Open-market sale | Common Stock | 817 | $50.99 | $42K | |
| Daniel P. McGahn - Officer | Grant or award | Common Stock | 60,000 footnote F1 | $0.00 | - | |
| Daniel P. McGahn - Officer | Open-market sale | Common Stock | 13,762 | $49.45 footnote F3 | $681K | |
| Daniel P. McGahn - Officer | Open-market sale | Common Stock | 27,900 | $50.63 footnote F4 | $1.41M | |
| Daniel P. McGahn - Officer | Open-market sale | Common Stock | 28,558 | $51.46 footnote F5 | $1.47M | |
| Daniel P. McGahn - Officer | Open-market sale | Common Stock | 2,305 | $52.14 footnote F6 | $120K | |
| ||||||
| Terence Robert Donnelly | Grant or award | Common Stock | 2,665 | $0.00 | - | |
 David R. Oliver Jr. | Grant or award | Common Stock | 3,116 | $0.00 | - | |
| Barbara G. Littlefield | Grant or award | Common Stock | 3,116 | $0.00 | - | |
| Margaret D. Klein | Grant or award | Common Stock | 3,116 | $0.00 | - | |
| Arthur H. House | Grant or award | Common Stock | 3,116 | $0.00 | - | |
| Laura A. Dambier | Grant or award | Common Stock | 3,116 | $0.00 | - | |
| David R. Oliver Jr. | Open-market sale | Common Stock | 200 | $34.10 | $7K | |
| David R. Oliver Jr. | Open-market purchase | Common Stock | 200 | $8.33 | $2K | |
| Margaret D. Klein | Open-market purchase | Common Stock | 500 | $5.57 | $3K | |
| Arthur H. House | Option exercise | Common Stock | 9,703 | $6.80 | $66K | |
| Arthur H. House | Open-market sale | Common Stock | 9,703 | $50.92 | $494K | |
| Arthur H. House | Option exercise | Stock Options (Right to Buy) | 9,703 | $0.00 | - | |
| John W. Kosiba Jr. - Officer | Open-market sale | Common Stock | 34,260 | $54.34 | $1.86M | |
| John W. Kosiba Jr. - Officer | Open-market sale | Common Stock | 15,740 | $55.13 | $868K | |
| John W. Kosiba Jr. - Officer | Open-market sale | Common Stock | 9,843 | $55.26 | $544K | |
| Daniel P. McGahn - Officer | Open-market sale | Common Stock | 73,105 | $54.26 | $3.97M | |
| Daniel P. McGahn - Officer | Open-market sale | Common Stock | 27,743 | $55.11 | $1.53M | |
| John W. Kosiba Jr. - Officer | Open-market sale | Common Stock | 50,000 | $28.28 | $1.41M | |
| Daniel P. McGahn - Officer | Grant or award | Common Stock | 180,000 | $0.00 | - | |
Item 5.02
Item 2.02, 5.07, 9.01
Item 5.02, 9.01
Item 2.02, 9.01
Recent AMSC Form 144 notices of proposed sale
3An insider files Form 144 before selling restricted or control stock. It announces a planned sale. If the sale goes ahead, it shows up later on a Form 4.
| Filed | Filer | Relationship | Shares | Market value | Notice |
|---|---|---|---|---|---|
| - | - | - | - | View on EDGAR | |
| - | - | - | - |
AMSC insider trading FAQ
What is the latest insider trade for AMSC?
AMERICAN SUPERCONDUCTOR CORP /DE/ (AMSC) had 1 insider filing in the last 90 days, with the most recent on 2026-09-21. The full record for AMSC runs to 22 Form 4 filings, the earliest from 2024-10-01. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.
How many insiders are buying AMSC stock?
No insider purchases of AMSC were filed in the last 90 days. 2 purchases are on record for this company.
How many insiders are selling AMSC stock?
No insider sales of AMSC were filed in the last 90 days. 32 sales are on record for this company.
Where can I see AMSC SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page collects AMSC Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
More Information Technology companies with insider activity
Recent insider filings
10The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.
- - Barbara G. Littlefield view on EDGAR
- - Laura A. Dambier view on EDGAR
- - John W. Kosiba Jr. view on EDGAR
- - Daniel P. McGahn view on EDGAR
- - John W. Kosiba Jr. view on EDGAR
- - Daniel P. McGahn view on EDGAR
- - John W. Kosiba Jr. view on EDGAR
- - Daniel P. McGahn view on EDGAR
- - Terence Robert Donnelly view on EDGAR
Related companies with recent insider activity
Learn more
- What the Form 4 transaction codes mean
- Grants, option exercises, gifts and tax withholding are not trades on the market. The codes say which is which.
- Form 144 vs Form 4
- A Form 144 announces a planned sale; the Form 4 reports it after it happens.
- Insider activity in Information Technology
- Where AMSC's peers are being bought and sold.
- Every recent Form 4
- The market-wide feed, updated as filings arrive from SEC EDGAR.
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