David A. Henry is CFO & VP +1 at AMERICAN SUPERCONDUCTOR CORP /DE/ (AMSC). They have made 6 open-market trades across 2 companies since 2008, most recently 2026-08-07.
CIK 0001195842
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
4 open-market purchases totalling $64K since 2020, against 2 sales. Too few scored purchases to measure a record yet.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| MYO | BUY | 2023-01-17 | 2023-01-18 | $0.33 | $25K | +3.3% | +44.7% | +48.9% |
| MYO | BUY | 2022-11-22 | 2022-11-22 | $0.55 | $5K | +0.0% | -27.9% | +4.9% |
| MYO | BUY | 2021-11-16 | 2021-11-16 | $8.86 | $9K | -2.9% | -10.3% | -12.5% |
| MYO | BUY | 2020-02-13 | 2020-02-14 | $6.99 | $24K | -13.6% | -44.6% | -26.1% |
| AMSC | SELL | 2016-06-16 | 2016-06-20 | $8.38 | $111K | -1.1% | +3.4% | -21.2% |
| AMSC | SELL | 2016-04-05 | 2016-04-07 | $8.19 | $154K | -1.2% | +28.1% | -2.1% |
| AMSC | SELL · 10b5-1 | 2015-07-31 | 2015-08-04 | $5.07 | $5K | -6.1% | +6.3% | +6.3% |
| AMSC | SELL · 10b5-1 | 2014-07-31 | 2014-08-04 | $2.02 | $19K | -6.1% | +6.3% | +6.3% |
| AMSC | SELL · 10b5-1 | 2014-06-24 | 2014-06-26 | $1.49 | $17K | -6.1% | +6.3% | +6.3% |
| AMSC | SELL · 10b5-1 | 2014-05-09 | 2014-05-13 | $1.27 | $5K | -6.1% | +6.3% | +6.3% |
| AMSC | SELL · 10b5-1 | 2014-05-08 | 2015-05-12 | $6.51 | $32K | -6.1% | +6.3% | +6.3% |
| AMSC | SELL · 10b5-1 | 2013-05-08 | 2013-05-10 | $2.53 | $15K | -6.1% | +6.3% | +6.3% |
| AMSC | SELL · 10b5-1 | 2012-05-10 | 2012-05-11 | $4.12 | $9K | -6.1% | +6.3% | +6.3% |
| AMSC | SELL · 10b5-1 | 2011-05-13 | 2011-05-16 | $11.49 | $133K | -6.1% | +6.3% | +6.3% |
| AMSC | SELL · 10b5-1 | 2010-10-06 | 2010-10-08 | $36.05 | $288K | -6.1% | +6.3% | +6.3% |
| AMSC | SELL · 10b5-1 | 2010-07-12 | 2010-07-13 | $28.15 | $211K | -6.1% | +6.3% | +6.3% |
| AMSC | SELL · 10b5-1 | 2010-05-13 | 2010-05-14 | $30.68 | $23K | -6.1% | +6.3% | +6.3% |
| AMSC | SELL · 10b5-1 | 2010-02-05 | 2010-02-08 | $31.72 | $555K | -6.1% | +6.3% | +6.3% |
| AMSC | SELL · 10b5-1 | 2009-11-27 | 2009-11-30 | $33.00 | $99K | -6.1% | +6.3% | +6.3% |
| AMSC | SELL · 10b5-1 | 2009-07-01 | 2009-07-02 | $27.00 | $103K | -6.1% | +6.3% | +6.3% |
| AMSC | SELL · 10b5-1 | 2008-07-18 | 2008-07-21 | $33.20 | $66K | -6.1% | +6.3% | +6.3% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.