David Tsung-Hung Chao

Board Director

Director

Insider activity · 24 months0 buys2 salesCumulative net flow

Nov 24 · 0 buys · 2 salesDec 24 · 0 buys · 0 salesJan 25 · 0 buys · 0 salesFeb 25 · 0 buys · 0 salesMar 25 · 0 buys · 0 salesApr 25 · 0 buys · 0 salesMay 25 · 0 buys · 0 salesJun 25 · 0 buys · 0 salesJul 25 · 0 buys · 0 salesAug 25 · 0 buys · 0 salesSept 25 · 0 buys · 0 salesOct 25 · 0 buys · 0 salesNov 25 · 0 buys · 0 salesDec 25 · 0 buys · 0 salesJan 26 · 0 buys · 0 salesFeb 26 · 0 buys · 0 salesMar 26 · 0 buys · 0 salesApr 26 · 0 buys · 0 salesMay 26 · 0 buys · 0 salesJun 26 · 0 buys · 0 salesJul 26 · 0 buys · 0 salesAug 26 · 0 buys · 0 salesSept 26 · 0 buys · 0 salesOct 26 · 0 buys · 0 sales

Total declarations

Company

▲ Purchases (0 ops.)

—

▼ Sales (3 ops.)

€552k

Latest filing published 10 Aug 2026 for Westlake CORP.

Filing timeline

BuySale

David Tsung-Hung Chao

Insider track record

Disclosed buys

Disclosed sells

Not enough buy signals with a settled T+90 horizon to measure a track record yet.

Signal history

David Tsung-Hung Chao: trading record in brief

David Tsung-Hung Chao is a declared insider of Westlake Corp (board member), with filings sourced from SEC (Form 4). We count 13 filings; the first trade dates from 5 January 2019 and the latest from 8 August 2026.

No open-market purchase appears, only 3 sales worth €552k. Besides market trades, the filings include 9 option exercises.

Most recently, on 10 August 2026, the filings show an option exercise in Westlake Corp. Filings reach the SEC (Form 4) feed a median of 2 days after the trade. For comparison, the SEC allows two business days to file a Form 4. Selling is not necessarily a view on the stock: liquidity needs and diversification are common motives. These figures are compiled from regulatory filings published by SEC (Form 4). They describe what insiders did and are not a recommendation.