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Mark R Witkowski

CIK 1866738 · Chief Executive Officer · last filed 2026-03-13

Mark R Witkowski is a Chief Executive Officer who has filed 21 SEC Form 4 insider transactions across 1 company since 2022. The most recent filing, for CNM, was dated Mar 13, 2026. Across all open-market trades the lifetime net is −$22.2M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $2.2M 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.

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Disclosed Exposure

$2.15M

Companies

1

Total Filings

21

Lifetime Open-Market Net

-$22.18M

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
CNM Chief Executive Officer 51,119 $42.07 $2.15M -$22.18M 18 2026-03-13

Recent Filings

21 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
2026-03-13 CNM Mixed +16,687 -$82.8K EDGAR
2026-03-11 CNM Tax (F) −1,415 -$70.1K EDGAR
2025-08-20 CNM Mixed — -$6.41M EDGAR
2025-07-21 CNM Mixed — -$6.13M EDGAR
2025-07-17 CNM Notice (144) −100,000 -$6.05M EDGAR
2025-04-02 CNM Grant (A) +10,092 $0 EDGAR
2025-03-17 CNM Grant (A) +7,296 $0 EDGAR
2025-03-13 CNM Tax (F) −925 -$43.1K EDGAR
2025-03-11 CNM Tax (F) −1,532 -$72.2K EDGAR
2025-01-17 CNM Tax (F) −2,982 -$115.7K EDGAR
Showing 1–10 of 21
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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.