John Tsung-chen Chao
CIK 1746472 · VP & MD, Westlake Innovations · last filed 2026-02-23
John Tsung-chen Chao is a VP & MD, Westlake Innovations who has filed 13 SEC Form 4 insider transactions across 1 company since 2018. The most recent filing, for WLK, was dated Feb 23, 2026. Current disclosed insider exposure totals $8.27B 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.
$8.27B
1
13
$0
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| WLK | Director | 93,413,442 | $88.50 | $8.27B | $0 | 13 | 2026-02-23 |
Recent Filings
13 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-02-23 | WLK | Mixed | +122 | -$8.6K | EDGAR |
| 2026-02-19 | WLK | Mixed | +328 | -$23.9K | EDGAR |
| 2025-03-07 | WLK | Mixed | +564 | -$42.5K | EDGAR |
| 2025-03-06 | WLK | Mixed | +278 | -$25.5K | EDGAR |
| 2025-02-24 | WLK | Grant (A) | +955 | $0 | EDGAR |
| 2025-02-20 | WLK | Exer (M) | +513 | $0 | EDGAR |
| 2024-02-20 | WLK | Grant (A) | — | $0 | EDGAR |
| 2023-02-21 | WLK | Grant (A) | — | $0 | EDGAR |
| 2022-03-21 | WLK | Grant (A) | — | $0 | EDGAR |
| 2021-08-16 | WLK | Exer (M) | +2,400 | $0 | EDGAR |