Home

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 65 SEC Form 4 insider transactions across 2 companies since 2017. The most recent filing, for AMSC, was dated 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 $11.2M 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.

Loading insider history…
Disclosed Exposure

$11.23M

Companies

2

Total Filings

65

Lifetime Open-Market Net

-$12.61M

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
AMSC SVP, CFO & Treasurer 334,748 $33.45 $11.20M -$12.47M 35 2026-06-11
NNDM SVP, CFO & Treasurer 18,329 $1.58 $29.0K -$145.6K 16 2019-07-30

Recent Filings

65 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2026-06-11 AMSC Notice (144) −6,769 -$253.6K EDGAR
2026-06-11 AMSC Sell (S) −6,769 -$253.6K EDGAR
2026-06-10 AMSC Sell (S) −4,835 -$202.0K EDGAR
2026-06-08 AMSC Notice (144) −4,835 -$202.0K EDGAR
2026-06-03 AMSC Notice (144) −6,447 -$315.5K EDGAR
2026-06-03 AMSC Mixed −6,909 -$1.86M EDGAR
2026-06-02 AMSC Notice (144) −30,462 -$1.55M EDGAR
2025-08-06 AMSC Sell (S) −59,843 -$3.27M EDGAR
2025-08-04 AMSC Notice (144) −50,000 -$2.73M EDGAR
2025-06-12 AMSC Sell (S) −6,642 -$189.8K EDGAR
Showing 1–10 of 65
Page 1 of 7
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.