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Jack Kienzler

CIK 1978216 · Chief Financial Officer · last filed 2026-06-02

Jack Kienzler is a Chief Financial Officer who has filed 17 SEC Form 4 insider transactions across 1 company since 2023. The most recent filing shows the insider sold $232.2K of ATMU on Jun 2, 2026. Across all open-market trades the lifetime net is −$232.2K, making them a net seller over the disclosed history. Current disclosed insider exposure totals $3.9M 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.

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Disclosed Exposure

$3.88M

Companies

1

Total Filings

17

Lifetime Open-Market Net

-$232.2K

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
ATMU Chief Financial Officer 75,804 $51.17 $3.88M -$232.2K 16 2026-06-02

Recent Filings

17 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
2026-06-02 ATMU Sell (S) −5,132 -$232.2K EDGAR
2026-06-01 ATMU Notice (144) −5,132 -$232.2K EDGAR
2026-04-02 ATMU Grant (A) +5,163 $0 EDGAR
2026-03-03 ATMU Tax (F) −20,117 -$1.30M EDGAR
2026-02-17 ATMU Grant (A) +41,094 $0 EDGAR
2025-10-07 ATMU Tax (F) −25 -$1.1K EDGAR
2025-04-03 ATMU Grant (A) +6,804 $0 EDGAR
2025-03-05 ATMU Tax (F) −839 -$33.4K EDGAR
2025-02-19 ATMU Grant (A) +1,535 $0 EDGAR
2025-01-16 ATMU — — $0 EDGAR
Showing 1–10 of 17
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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.