WILLIAM HORNBUCKLE
CIK 1183302 · CEO AND PRESIDENT · last filed 2026-08-05
WILLIAM HORNBUCKLE is a CEO AND PRESIDENT who has filed 153 SEC Form 4 insider transactions across 4 companies since 2010. The most recent filing, for MTN, was dated Aug 5, 2026. Across all open-market trades the lifetime net is −$29.2M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $6.8M 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.
$6.85M
4
153
-$29.18M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| MTN | Director | — | $146.26 | — | $0 | 1 | 2026-08-05 |
| GBFH | Director | 328,269 | $20.86 | $6.85M | $0 | 6 | 2026-07-09 |
| MGM.WD | CEO AND PRESIDENT | 777,854 | — | — | -$29.85M | 138 | 2026-02-25 |
| MGM Growth Properties LLC (MGP) Delisted | Director | 39,212 | $41.64 | $1.63M | $673.7K | 8 | 2017-04-21 |
Recent Filings
153 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-08-05 | MTN | Grant (A) | — | $0 | EDGAR |
| 2026-07-09 | GBFH | Grant (A) | +571 | $16.3K | EDGAR |
| 2026-02-25 | MGM.WD | Mixed | +8,775 | -$123.8K | EDGAR |
| 2026-01-07 | GBFH | Grant (A) | +178 | $6.4K | EDGAR |
| 2025-12-22 | GBFH | Grant (A) | +1,100 | $0 | EDGAR |
| 2025-12-09 | GBFH | Gift (G) | −100,000 | $0 | EDGAR |
| 2025-10-08 | MGM.WD | Mixed | +19,675 | -$422.8K | EDGAR |
| 2025-10-07 | MGM.WD | Mixed | +115,996 | -$2.55M | EDGAR |
| 2025-10-06 | MGM.WD | Mixed | +16,485 | -$371.7K | EDGAR |
| 2025-10-03 | GBFH | Grant (A) | +148 | $5.9K | 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.