Insider · CIK 0001703463
John W Kosiba JR
Files at AMSC (AMERICAN SUPERCONDUCTOR CORP /DE/). First filing Nov 6, 2024, latest Jun 11, 2026.
In brief
John W Kosiba JR files SEC Form 4 as CFO at AMSC (AMERICAN SUPERCONDUCTOR CORP /DE/). Since Nov 6, 2024, John W Kosiba JR has reported 0 open-market buys worth $0 and 9 open-market sells worth $9.0M, the latest filed on Jun 11, 2026.
A track record needs three past buys with six months of prices behind them; John W Kosiba JR has 0, so none is measured yet.
The newest scored trade: sold $254k of AMSC on Jun 11, 2026, filed Jun 11, 2026, scored 30 (weak), under a 10b5-1 plan. In the last 12 months: 0 buys worth $0 and 3 sells worth $2.3M.
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 |
|---|---|---|---|---|---|
| 30Weak | AMERICAN SUPERCONDUCTOR CORP /DE/ | $254k 6,769 shares | -2% | +52% from low-41% from high | |
| 29Weak | AMERICAN SUPERCONDUCTOR CORP /DE/ | $202k 4,835 shares | -1% | +67% from low-35% from high | |
| 42Moderate | AMERICAN SUPERCONDUCTOR CORP /DE/ | $1.9M 36,909 shares | -10% | +97% from low-23% from high | |
| 67Notable | AMERICAN SUPERCONDUCTOR CORP /DE/ | $3.3M 59,843 shares | -15% | +251% from low-2% from high | |
| 22Weak | AMERICAN SUPERCONDUCTOR CORP /DE/ | $190k 6,642 shares | -2% | +88% from low-19% from high | |
| 21Weak | AMERICAN SUPERCONDUCTOR CORP /DE/ | $151k 4,744 shares | -1% | +99% from low-14% from high | |
| 40Moderate | AMERICAN SUPERCONDUCTOR CORP /DE/ | $1.3M 50,000 shares | -11% | +73% from low-26% from high | |
| 24Weak | AMERICAN SUPERCONDUCTOR CORP /DE/ | $291k 11,860 shares | -2% | +56% from low-33% from high | |
| 52Moderate | AMSCsell AMERICAN SUPERCONDUCTOR CORP /DE/ | $1.4M 50,000 shares | -12% | - |
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 |
|---|---|---|---|---|---|
| Jun 11, 2026 | AMSC AMERICAN SUPERCONDUCTOR CORPORATION | 6,769 0.01% of outstanding | $254k | Jun 11, 2026 | $2.1M |
| Jun 8, 2026 | AMSC AMERICAN SUPERCONDUCTOR CORPORATION | 4,835 0.01% of outstanding | $202k | Jun 8, 2026 | $1.9M |
| Jun 3, 2026 | AMSC AMERICAN SUPERCONDUCTOR CORPORATION | 6,447 0.01% of outstanding | $316k | Jun 3, 2026 | $1.5M |
| Jun 2, 2026 | AMSC AMERICAN SUPERCONDUCTOR CORPORATION | 30,462 0.06% of outstanding | $1.5M | Jun 2, 2026 | none |
| Aug 4, 2025 | AMSC AMERICAN SUPERCONDUCTOR CORPORATION | 50,000 0.11% of outstanding | $2.7M | Aug 4, 2025 | $2.0M |
| Jun 11, 2025 | AMSC AMERICAN SUPERCONDUCTOR CORPORATION | 6,642 0.02% of outstanding | $190k | Jun 11, 2025 | $1.8M |
| Jun 6, 2025 | AMSC AMERICAN SUPERCONDUCTOR CORPORATION | 4,744 0.01% of outstanding | $151k | Jun 6, 2025 | $1.6M |
| May 27, 2025 | AMSC AMERICAN SUPERCONDUCTOR CORPORATION | 50,000 0.13% of outstanding | $1.3M | May 27, 2025 | $291k |
| May 20, 2025 | AMSC AMERICAN SUPERCONDUCTOR CORPORATION | 11,860 0.03% of outstanding | $291k | May 20, 2025 | none |
| Nov 5, 2024 | AMSC AMERICAN SUPERCONDUCTOR CORP /DE/ | 50,000 0.13% of outstanding | $1.4M | Nov 4, 2024 | none |
Transactions
Every row this insider has filed, 23 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Jun 11, 2026 | AMSC AMERICAN SUPERCONDUCTOR CORP /DE/ | SOpen-market sale Common Stock10b5-1 | -5,026 | $37.33 | $188k | 336,120 | Jun 11, 2026 |
| Jun 11, 2026 | AMSC AMERICAN SUPERCONDUCTOR CORP /DE/ | SOpen-market sale Common Stock10b5-1 | -1,743 | $37.85 | $66k | 334,377 | Jun 11, 2026 |
| Jun 8, 2026 | AMSC AMERICAN SUPERCONDUCTOR CORP /DE/ | SOpen-market sale Common Stock10b5-1 | -3,286 | $41.50 | $136k | 342,695 | Jun 10, 2026 |
| Jun 8, 2026 | AMSC AMERICAN SUPERCONDUCTOR CORP /DE/ | SOpen-market sale Common Stock10b5-1 | -1,549 | $42.35 | $66k | 341,146 | Jun 10, 2026 |
| Jun 1, 2026 | AMSC AMERICAN SUPERCONDUCTOR CORP /DE/ | AGrant or award Common Stock10b5-1 | +30,000 | $0.00 | $0 | 382,890 | Jun 3, 2026 |
| Jun 2, 2026 | AMSC AMERICAN SUPERCONDUCTOR CORP /DE/ | SOpen-market sale Common Stock10b5-1 | -5,704 | $49.46 | $282k | 377,186 | Jun 3, 2026 |
| Jun 2, 2026 | AMSC AMERICAN SUPERCONDUCTOR CORP /DE/ | SOpen-market sale Common Stock10b5-1 | -12,122 | $50.62 | $614k | 365,064 | Jun 3, 2026 |
| Jun 2, 2026 | AMSC AMERICAN SUPERCONDUCTOR CORP /DE/ | SOpen-market sale Common Stock10b5-1 | -12,036 | $51.47 | $619k | 353,028 | Jun 3, 2026 |
| Jun 2, 2026 | AMSC AMERICAN SUPERCONDUCTOR CORP /DE/ | SOpen-market sale Common Stock10b5-1 | -600 | $52.19 | $31k | 352,428 | Jun 3, 2026 |
| Jun 3, 2026 | AMSC AMERICAN SUPERCONDUCTOR CORP /DE/ | SOpen-market sale Common Stock10b5-1 | -3,200 | $48.31 | $155k | 349,228 | Jun 3, 2026 |
| Jun 3, 2026 | AMSC AMERICAN SUPERCONDUCTOR CORP /DE/ | SOpen-market sale Common Stock10b5-1 | -2,638 | $49.28 | $130k | 346,590 | Jun 3, 2026 |
| Jun 3, 2026 | AMSC AMERICAN SUPERCONDUCTOR CORP /DE/ | SOpen-market sale Common Stock10b5-1 | -609 | $50.83 | $31k | 345,981 | Jun 3, 2026 |
| Aug 4, 2025 | AMSC AMERICAN SUPERCONDUCTOR CORP /DE/ | SOpen-market sale Common Stock | -34,260 | $54.34 | $1.9M | 368,630 | Aug 6, 2025 |
| Aug 4, 2025 | AMSC AMERICAN SUPERCONDUCTOR CORP /DE/ | SOpen-market sale Common Stock | -15,740 | $55.13 | $868k | 352,890 | Aug 6, 2025 |
| Aug 4, 2025 | AMSC AMERICAN SUPERCONDUCTOR CORP /DE/ | SOpen-market sale Common Stockindirect: By 401(k) plan | -9,843 | $55.26 | $544k | 0 | Aug 6, 2025 |
| Jun 11, 2025 | AMSC AMERICAN SUPERCONDUCTOR CORP /DE/ | SOpen-market sale Common Stock10b5-1 | -6,342 | $28.55 | $181k | 403,190 | Jun 12, 2025 |
| Jun 11, 2025 | AMSC AMERICAN SUPERCONDUCTOR CORP /DE/ | SOpen-market sale Common Stock10b5-1 | -300 | $29.08 | $8,725 | 402,890 | Jun 12, 2025 |
| Jun 6, 2025 | AMSC AMERICAN SUPERCONDUCTOR CORP /DE/ | SOpen-market sale Common Stock10b5-1 | -4,744 | $31.83 | $151k | 409,532 | Jun 9, 2025 |
| May 27, 2025 | AMSC AMERICAN SUPERCONDUCTOR CORP /DE/ | SOpen-market sale Common Stock10b5-1 | -10,097 | $25.55 | $258k | 454,179 | May 29, 2025 |
| May 27, 2025 | AMSC AMERICAN SUPERCONDUCTOR CORP /DE/ | SOpen-market sale Common Stock10b5-1 | -39,903 | $26.61 | $1.1M | 414,276 | May 29, 2025 |
| May 20, 2025 | AMSC AMERICAN SUPERCONDUCTOR CORP /DE/ | SOpen-market sale Common Stock10b5-1 | -11,860 | $24.50 | $291k | 464,276 | May 22, 2025 |
| May 15, 2025 | AMSC AMERICAN SUPERCONDUCTOR CORP /DE/ | AGrant or award Common Stock | +120,000 | $0.00 | $0 | 476,136 | May 19, 2025 |
| Nov 4, 2024 | AMSC AMERICAN SUPERCONDUCTOR CORP /DE/ | SOpen-market sale Common Stock | -50,000 | $28.28 | $1.4M | 356,136 | Nov 6, 2024 |
Questions about John W Kosiba JR
Answered from the filings on this page, as of the latest one.
Is John W Kosiba JR buying or selling?
In the last 12 months John W Kosiba JR reported 0 open-market buys worth $0 and 3 open-market sells worth $2.3M on SEC Form 4; the latest was sold $254k of AMSC on Jun 11, 2026. Grants, option exercises and tax withholding are not counted.
How did John W Kosiba JR's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and John W Kosiba JR has 0.
Where does John W Kosiba JR file Form 4?
John W Kosiba JR has filed Form 4 at AMSC (AMERICAN SUPERCONDUCTOR CORP /DE/) as SVP, CFO & Treasurer. 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.