John W JR Kosiba
CIK 1703463 · SVP, CFO & Treasurer · last filed 2026-06-11
John W JR Kosiba is a SVP, CFO & Treasurer who has filed 51 SEC Form 4 insider transactions across 2 companies since 2017. The most recent filing shows the insider sold $253.6K of AMSC on Jun 11, 2026. Across all open-market trades the lifetime net is −$12.6M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $13.7M across reported positions.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
$13.67M
2
51
-$12.61M
Holdings By Company
Recent Filings
51 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-06-11 | AMSC | Sell (S) | −6,769 | -$253.6K | EDGAR |
| 2026-06-10 | AMSC | Sell (S) | −4,835 | -$202.0K | EDGAR |
| 2026-06-03 | AMSC | Mixed | −6,909 | -$1.86M | EDGAR |
| 2025-08-06 | AMSC | Sell (S) | −59,843 | -$3.27M | EDGAR |
| 2025-06-12 | AMSC | Sell (S) | −6,642 | -$189.8K | EDGAR |
| 2025-06-09 | AMSC | Sell (S) | −4,744 | -$151.0K | EDGAR |
| 2025-05-29 | AMSC | Sell (S) | −50,000 | -$1.32M | EDGAR |
| 2025-05-22 | AMSC | Sell (S) | −11,860 | -$290.5K | EDGAR |
| 2025-05-19 | AMSC | Grant (A) | +120,000 | $0 | EDGAR |
| 2024-11-06 | AMSC | Sell (S) | −50,000 | -$1.41M | EDGAR |