Insider · CIK 0001685155
Arthur H House
Files at AMSC (AMERICAN SUPERCONDUCTOR CORP /DE/). First filing Aug 8, 2025, latest Aug 8, 2025.
In brief
Arthur H House files SEC Form 4 as director at AMSC (AMERICAN SUPERCONDUCTOR CORP /DE/). Since Aug 8, 2025, Arthur H House has reported 0 open-market buys worth $0 and 1 open-market sell worth $494k, the latest filed on Aug 8, 2025.
A track record needs three past buys with six months of prices behind them; Arthur H House has 0, so none is measured yet.
The newest scored trade: sold $494k of AMSC on Aug 8, 2025, filed Aug 8, 2025, scored 38 (weak).
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
AMSC: AMERICAN SUPERCONDUCTOR CORP /DE/
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 38Weak | AMERICAN SUPERCONDUCTOR CORP /DE/ | $494k 9,703 shares | -17% | +223% from low-10% from high |
Planned sales
Form 144 notices this insider filed before selling restricted or control stock, newest first.
| Filed | Company | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| Aug 8, 2025 | AMSC American Superconductor | 9,703 0.02% of outstanding | $493k | Aug 8, 2025 | none |
Transactions
Every row this insider has filed, 5 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Apr 3, 2026 | AMSC AMERICAN SUPERCONDUCTOR CORP /DE/ | AGrant or award Common Stock | +3,116 | $0.00 | $0 | 51,779 | Apr 7, 2026 |
| Aug 6, 2025 | AMSC AMERICAN SUPERCONDUCTOR CORP /DE/ | MOption exercise Common Stock | +9,703 | $6.80 | $66k | 58,366 | Aug 8, 2025 |
| Aug 8, 2025 | AMSC AMERICAN SUPERCONDUCTOR CORP /DE/ | SOpen-market sale Common Stock | -9,703 | $50.92 | $494k | 48,663 | Aug 8, 2025 |
| Aug 6, 2025 | AMSC AMERICAN SUPERCONDUCTOR CORP /DE/ | MOption exercise Stock Options (Right to Buy)derivative | -9,703 | $0.00 | $0 | 0 | Aug 8, 2025 |
| Apr 3, 2025 | AMSC AMERICAN SUPERCONDUCTOR CORP /DE/ | AGrant or award Common Stock | +2,639 | $0.00 | $0 | 48,663 | Apr 4, 2025 |
Questions about Arthur H House
Answered from the filings on this page, as of the latest one.
Is Arthur H House buying or selling?
Not in the last 12 months. Arthur H House's latest open-market trade on SEC Form 4 was sold $494k of AMSC on Aug 8, 2025.
How did Arthur H House's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Arthur H House has 0.
Where does Arthur H House file Form 4?
Arthur H House has filed Form 4 at AMSC (AMERICAN SUPERCONDUCTOR CORP /DE/). A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.