Insider Profile · SEC Form 4 Activity · Trailing 90 Days
Kosiba John W Jr
Over the trailing 90 days, Kosiba John W Jr (Other at AMERICAN SUPERCONDUCTOR CORP /DE/) sold $2.3M of stock in AMSC, per 12 SEC Form 4 transactions.
- Role
- Other
- Companies
- AMSC
- Window
- Trailing 90 days · 12 transactions · CIK 1703463
- Net activity
- −$2.3M ($0 bought · $2.3M sold)
By Company (Trailing 90 Days)
| Symbol | Company | Txns | Bought | Sold | Net |
|---|---|---|---|---|---|
| AMSC | AMERICAN SUPERCONDUCTOR CORP /DE/ | 12 | — | $2.3M | −$2.3M |
Transactions (12)
| Date | Symbol | Type | Shares | Value | Description |
|---|---|---|---|---|---|
| 2026-06-11 | AMSC | Sell | 1.7K | $66K | Open market or private sale |
| 2026-06-11 | AMSC | Sell | 5.0K | $188K | Open market or private sale |
| 2026-06-08 | AMSC | Sell | 3.3K | $136K | Open market or private sale |
| 2026-06-08 | AMSC | Sell | 1.5K | $66K | Open market or private sale |
| 2026-06-03 | AMSC | Sell | 609 | $31K | Open market or private sale |
| 2026-06-03 | AMSC | Sell | 2.6K | $130K | Open market or private sale |
| 2026-06-03 | AMSC | Sell | 3.2K | $155K | Open market or private sale |
| 2026-06-02 | AMSC | Sell | 12.0K | $619K | Open market or private sale |
| 2026-06-02 | AMSC | Sell | 600 | $31K | Open market or private sale |
| 2026-06-02 | AMSC | Sell | 12.1K | $614K | Open market or private sale |
| 2026-06-02 | AMSC | Sell | 5.7K | $282K | Open market or private sale |
| 2026-06-01 | AMSC | Buy | 30.0K | $0 | Grant, award or other acquisition |
Activity shown covers the trailing 90 days of SEC Form 4 filings. "Buy" and "sell" follow the SEC acquired/disposed codes and include compensation events (grants, option exercises, tax withholding) unless noted. Historical fact, not investment advice.
Follow Kosiba's next move
Real-time Form 4 alerts, insider track records, and cluster detection — matched to your watchlist.