WILLIAM S BOYD
CIK 940434 · Co-Executive Chair · last filed 2024-03-15
WILLIAM S BOYD is a Co-Executive Chair who has filed 214 SEC Form 4 insider transactions across 4 companies since 2007. The most recent filing, for BYD, was dated Apr 29, 2026. Across all open-market trades the lifetime net is −$115.9M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $368.8M 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.
$368.79M
4
214
-$115.87M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| BYD | 10%+ Owner | 405,005 | $89.70 | $36.33M | -$123.48M | 131 | 2024-03-15 |
| WALpA | 0 | $23.91 | $0 | $0 | 1 | 2023-08-04 | |
| WESTERN ALLIANCE BANCORPORATION (WALA) Delisted | Director | 4,010,189 | $25.37 | $101.74M | -$3.32M | 9 | 2019-06-21 |
| WAL | Director | 4,051,939 | $82.05 | $332.46M | $10.94M | 34 | 2016-05-04 |
Recent Filings
214 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-04-29 | BYD | Notice (144) | −8,514 | -$742.8K | EDGAR |
| 2026-02-26 | BYD | Notice (144) | −24,519 | -$2.11M | EDGAR |
| 2024-11-14 | BYD | Notice (144) | −110,200 | -$8.06M | EDGAR |
| 2024-11-13 | BYD | Notice (144) | −150,000 | -$11.04M | EDGAR |
| 2024-11-13 | BYD | Notice (144/A) | −114,910 | -$8.47M | EDGAR |
| 2024-11-12 | BYD | Notice (144) | −114,910 | -$8.47M | EDGAR |
| 2024-11-12 | BYD | Notice (144) | −115,000 | -$8.53M | EDGAR |
| 2024-11-08 | BYD | Notice (144) | −150,000 | -$11.00M | EDGAR |
| 2024-11-07 | BYD | Notice (144) | −150,000 | -$10.89M | EDGAR |
| 2024-11-06 | BYD | Notice (144) | −150,000 | -$10.74M | 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.