William C Fallon
CIK 1334233 · CEO & President · last filed 2026-03-05
William C Fallon is a CEO & President who has filed 54 SEC Form 4 insider transactions across 1 company since 2007. The most recent filing shows the insider had shares withheld for taxes covering $272.8K of MBI on Mar 5, 2026. Across all open-market trades the lifetime net is +$2.2M, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $17.4M 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.
$17.44M
1
54
$2.24M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| MBI | CEO & President | 2,826,660 | $6.17 | $17.44M | $2.24M | 54 | 2026-03-05 |
Recent Filings
54 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-03-05 | MBI | Tax (F) | −39,658 | -$272.8K | EDGAR |
| 2026-03-04 | MBI | Mixed | +214,582 | $1.39M | EDGAR |
| 2026-03-04 | MBI | Mixed | +214,312 | $1.39M | EDGAR |
| 2026-01-05 | MBI | Grant (A) | +14,220 | $101.8K | EDGAR |
| 2025-03-05 | MBI | Mixed | +247,227 | $1.36M | EDGAR |
| 2025-03-04 | MBI | Tax (F) | −556,019 | -$3.07M | EDGAR |
| 2024-03-06 | MBI | Mixed | +211,855 | $1.37M | EDGAR |
| 2024-03-05 | MBI | Tax (F) | −39,659 | -$256.6K | EDGAR |
| 2024-03-04 | MBI | Tax (F) | −38,812 | -$260.4K | EDGAR |
| 2024-02-22 | MBI | Grant (A) | +24,917 | $168.7K | EDGAR |