Arthur H. House is Director at AMERICAN SUPERCONDUCTOR CORP /DE/ (AMSC). They have made 1 open-market trade across 1 company since 2025, most recently 2026-04-03.
CIK 0001685155
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.
0 open-market purchases, against 1 sale. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| AMSC | 51,779 | $1.3M |
Shares reported on the most recent Form 4, priced at the 2026-04-07 close.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| AMSC | SELL | 2025-08-08 | 2025-08-08 | $50.92 | $988K | -6.2% | -2.3% | -28.7% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.