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 20 SEC Form 4 insider transactions across 1 company since 2022. The most recent filing shows the insider had shares withheld for taxes covering $16.3K of CNM on Mar 13, 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 $412.0K 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.
$412.0K
1
20
-$16.91M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| CNM | General Counsel and Secretary | 8,525 | $48.33 | $412.0K | -$16.91M | 20 | 2026-03-13 |
Recent Filings
20 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 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 |
| 2025-03-17 | CNM | Grant (A) | +3,411 | $0 | EDGAR |
| 2025-03-13 | CNM | Tax (F) | −510 | -$23.7K | EDGAR |
| 2025-03-11 | CNM | Tax (F) | −877 | -$41.3K | EDGAR |
| 2025-01-17 | CNM | Mixed | — | -$2.76M | EDGAR |
| 2025-01-14 | CNM | Mixed | −5,266 | -$2.59M | EDGAR |
| 2024-04-23 | CNM | Mixed | — | -$2.70M | EDGAR |