Mark G Whittenburg
CIK 1866737 · General Counsel and Secretary · last filed 2026-03-13
Mark G Whittenburg is a General Counsel and Secretary who has filed 26 SEC Form 4 insider transactions across 1 company since 2022. The most recent filing, for CNM, was dated Jun 30, 2026. Across all open-market trades the lifetime net is −$16.9M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $358.6K 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.
$358.6K
1
26
-$16.91M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| CNM | General Counsel and Secretary | 8,525 | $42.07 | $358.6K | -$16.91M | 20 | 2026-03-13 |
Recent Filings
26 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-06-30 | CNM | Notice (144) | −49,065 | -$2.36M | EDGAR |
| 2026-05-29 | CNM | Notice (144) | −18,814 | -$931.3K | EDGAR |
| 2026-05-27 | CNM | Notice (144) | −21,976 | -$1.09M | EDGAR |
| 2026-03-13 | CNM | Tax (F) | −331 | -$16.3K | EDGAR |
| 2026-03-11 | CNM | Tax (F) | −835 | -$41.4K | EDGAR |
| 2026-01-02 | CNM | Gift (G) | — | $0 | EDGAR |
| 2025-06-10 | CNM | Mixed | — | -$3.00M | EDGAR |
| 2025-06-06 | CNM | Notice (144) | −50,000 | -$2.98M | EDGAR |
| 2025-03-17 | CNM | Grant (A) | +3,411 | $0 | EDGAR |
| 2025-03-13 | CNM | Tax (F) | −510 | -$23.7K | EDGAR |
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.