Who
David Tsung-Hung Chao
Director
Company insider
Files Form 4 as: Director and 10% owner, Westlake.
In numbers
- Trades disclosed
- 35
- Buys
- 0
- Sells
- 3
- Bought
- $0
- Sold
- $584K
- Companies
- 1
- Companies where not an officer
- 1
- First trade
- 5 Jan 2018
- Last trade
- 14 Aug 2026
- Last filed
- 17 Aug 2026
Companies traded
Activity over time
1 Nov 2024 – 1 Oct 2026
Buys above the line, sells below, each month.
Every trade
| Traded | Company | What | Amount | |
|---|---|---|---|---|
| 14 Aug 2026filed 17 Aug 2026 | WLK Westlakeoption or derivative · Chemicals | SEC FORM 4 Code A | —2,184 at $0.00 | filing |
| 14 Aug 2026filed 17 Aug 2026 | WLK Westlakeoption or derivative · Chemicals | SEC FORM 4 Code A | —2,184 at $0.00 | filing |
| 8 Aug 2026filed 10 Aug 2026 | WLK WestlakeChemicals | SEC FORM 4 Code M | —2,168 | filing |
| 8 Aug 2026filed 10 Aug 2026 | WLK Westlakeoption or derivative · Chemicals | SEC FORM 4 Code M | —2,168 at $0.00 | filing |
| 8 Aug 2026filed 10 Aug 2026 | WLK Westlakeoption or derivative · Chemicals | SEC FORM 4 Code M | —2,168 at $0.00 | filing |
| 8 Aug 2026filed 10 Aug 2026 | WLK WestlakeChemicals | SEC FORM 4 Code M | —2,168 | filing |
| 9 Aug 2025filed 11 Aug 2025 | WLK Westlakeoption or derivative · Chemicals | SEC FORM 4 Code M | —1,128 at $0.00 | filing |
| 9 Aug 2025filed 11 Aug 2025 | WLK WestlakeChemicals | SEC FORM 4 Code M | —1,128 | filing |
| 8 Aug 2025filed 11 Aug 2025 | WLK Westlakeoption or derivative · Chemicals | SEC FORM 4 Code A | —2,168 at $0.00 | filing |
| 29 Nov 2024filed 2 Dec 2024 | WLK WestlakeChemicals | SEC FORM 4 Sold | $226K1,750 at $129.08 | filing |
| 22 Nov 2024filed 25 Nov 2024 | WLK WestlakeChemicals | SEC FORM 4 Sold | $228K1,750 at $130.00 | filing |
| 11 Aug 2024filed 12 Aug 2024 | WLK Westlakeoption or derivative · Chemicals | SEC FORM 4 Code M | —1,136 at $0.00 | filing |
| 11 Aug 2024filed 12 Aug 2024 | WLK WestlakeChemicals | SEC FORM 4 Code M | —1,136 | filing |
| 9 Aug 2024filed 12 Aug 2024 | WLK Westlakeoption or derivative · Chemicals | SEC FORM 4 Code A | —1,128 at $0.00 | filing |
| 31 Aug 2023filed 1 Sep 2023 | WLK WestlakeChemicals | SEC FORM 4 Code G | —19,423 at $0.00 | filing |
| 23 Aug 2023filed 24 Aug 2023 | WLK WestlakeChemicals | SEC FORM 4 Sold | $131K1,000 at $131.00 | filing |
| 12 Aug 2023filed 14 Aug 2023 | WLK Westlakeoption or derivative · Chemicals | SEC FORM 4 Code M | —1,446 at $0.00 | filing |
| 12 Aug 2023filed 14 Aug 2023 | WLK WestlakeChemicals | SEC FORM 4 Code M | —1,446 | filing |
| 11 Aug 2023filed 14 Aug 2023 | WLK Westlakeoption or derivative · Chemicals | SEC FORM 4 Code A | —1,136 at $0.00 | filing |
| 13 Aug 2022filed 15 Aug 2022 | WLK Westlakeoption or derivative · Chemicals | SEC FORM 4 Code M | —1,763 at $0.00 | filing |
News
Head-To-Head Analysis: Westlake (NYSE:WLK) and Neo Performance Materials (OTCMKTS:NOPMF)WLK · themarketsdaily.com · 13 Oct 2026
0 headlines in the last 90 days name David Tsung-Hung Chao; 1 article from the last 14 days about the 1 company they traded most, at most three about any one of them.