Albert Chao insider trades: Westlake (WLK) stock buys and sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Albert reports to the SEC
Open-market buys and sales
43 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Aug 11, 2026 | WLK | ↓ Sell | 38,873 | $80.28 | $3.1M | Direct | Aug 11, 2026 (0d) |
| Dec 22, 2025 | WLK | ↓ Sell | 40,836 | $73.57 | $3.0M | Direct | Dec 23, 2025 (1d) |
| May 19, 2022 | WLK | ↓ Sell | 37,876 | $130.38 | $4.9M | Direct | May 23, 2022 (4d) |
| Dec 2, 2021 | WLK | ↓ Sell | 30,787 | $91.85 | $2.8M | Direct | Dec 6, 2021 (4d) |
| Dec 1, 2021 | WLK | ↓ Sell | 30,787 | $91.75 | $2.8M | Direct | Dec 3, 2021 (2d) |
| Aug 11, 2021 | WLK | ↑ Buy | 3,000 | $86.21 | $259K | Direct | Aug 12, 2021 (1d) |
| Nov 6, 2020 | WLK | ↓ Sell | 55,148 | $72.99 | $4.0M | Direct | Nov 10, 2020 (4d) |
| Mar 24, 2020 | WLKP | ↑ Buy | 4,779 | $13.70 | $65K | Direct | Mar 25, 2020 (1d) |
| Mar 23, 2020 | WLKP | ↑ Buy | 4,780 | $13.12 | $63K | Direct | Mar 24, 2020 (1d) |
| Mar 20, 2020 | WLKP | ↑ Buy | 13,681 | $13.90 | $190K | Direct | Mar 23, 2020 (3d) |
| Mar 19, 2020 | WLKP | ↑ Buy | 9,135 | $13.80 | $126K | Direct | Mar 20, 2020 (1d) |
| Mar 18, 2020 | WLKP | ↑ Buy | 15,974 | $11.68 | $187K | Direct | Mar 19, 2020 (1d) |
| Mar 17, 2020 | WLKP | ↑ Buy | 10,536 | $13.82 | $146K | Direct | Mar 18, 2020 (1d) |
| Mar 16, 2020 | WLKP | ↑ Buy | 7,535 | $14.15 | $107K | Direct | Mar 17, 2020 (1d) |
| Mar 13, 2020 | WLKP | ↑ Buy | 3,580 | $15.18 | $54K | Direct | Mar 16, 2020 (3d) |
| Feb 21, 2020 | WLK | ↓ Sell | 51,592 | $62.42 | $3.2M | Direct | Feb 24, 2020 (3d) |
| Nov 19, 2018 | WLKP | ↑ Buy | 10,386 | $23.24 | $241K | Direct | Nov 20, 2018 (1d) |
| Nov 16, 2018 | WLK | ↓ Sell | 24,509 | $71.75 | $1.8M | Direct | Nov 19, 2018 (3d) |
| Nov 16, 2018 | WLKP | ↑ Buy | 14,944 | $23.26 | $348K | Direct | Nov 19, 2018 (3d) |
| Nov 15, 2018 | WLK | ↓ Sell | 49,130 | $71.31 | $3.5M | Direct | Nov 16, 2018 (1d) |
| Nov 14, 2018 | WLKP | ↑ Buy | 17,605 | $23.32 | $411K | Direct | Nov 15, 2018 (1d) |
| Nov 13, 2018 | WLK | ↓ Sell | 40,000 | $73.47 | $2.9M | Direct | Nov 14, 2018 (1d) |
| Mar 6, 2018 | WLKP | ↑ Buy | 2,000 | $23.16 | $46K | Direct | Mar 7, 2018 (1d) |
| Mar 5, 2018 | WLKP | ↑ Buy | 4,000 | $22.89 | $92K | Direct | Mar 6, 2018 (1d) |
| Mar 1, 2018 | WLKP | ↑ Buy | 2,500 | $22.98 | $57K | Direct | Mar 2, 2018 (1d) |
| Nov 29, 2017 | WLK | ↓ Sell | 41,844 | $94.84 | $4.0M | Direct | Nov 30, 2017 (1d) |
| Nov 29, 2017 | WLKP | ↑ Buy | 14,900 | $21.98 | $328K | by Trusts | Nov 29, 2017 (0d) |
| Nov 27, 2017 | WLK | ↓ Sell | 25,000 | $93.96 | $2.3M | Direct | Nov 28, 2017 (1d) |
| Nov 27, 2017 | WLKP | ↑ Buy | 10,375 | $22.12 | $230K | by Trusts | Nov 28, 2017 (1d) |
| Nov 24, 2017 | WLK | ↓ Sell | 45,000 | $94.76 | $4.3M | Direct | Nov 27, 2017 (3d) |
| Nov 22, 2017 | WLKP | ↑ Buy | 2,000 | $21.49 | $43K | Direct | Nov 27, 2017 (5d) |
| Nov 21, 2017 | WLK | ↓ Sell | 25,000 | $94.33 | $2.4M | Direct | Nov 22, 2017 (1d) |
| Feb 23, 2017 | WLK | ↓ Sell | 42,180 | $63.35 | $2.7M | Direct | Feb 28, 2017 (5d) |
| Nov 17, 2016 | WLK | ↓ Sell | 20,000 | $54.15 | $1.1M | By Mother's Estate | Nov 18, 2016 (1d) |
| Nov 15, 2016 | WLK | ↓ Sell | 20,000 | $52.95 | $1.1M | By Mother's Estate | Nov 16, 2016 (1d) |
| Aug 4, 2014 | WLKP | ↑ Buy | 45,000 | $24.00 | $1.1M | Direct | Aug 6, 2014 (2d) |
| Aug 4, 2014 | WLKP | ↑ Buy | 45,000 | $24.00 | $1.1M | Brother, James Chao | Aug 6, 2014 (2d) |
| Dec 7, 2012 | WLK | ↓ Sell | 3,608 | $73.75 | $266K | Direct | Dec 11, 2012 (4d) |
| Dec 6, 2012 | WLK | ↓ Sell | 34,262 | $72.55 | $2.5M | Direct | Dec 10, 2012 (4d) |
| Nov 26, 2012 | WLK | ↓ Sell | 46,613 | $75.19 | $3.5M | Direct | Nov 28, 2012 (2d) |
| Nov 23, 2012 | WLK | ↓ Sell | 20,000 | $76.16 | $1.5M | Direct | Nov 27, 2012 (4d) |
| Aug 16, 2004 | WLK | ↑ Buy | 20,000 | $14.50 | $290K | By Mother | Mar 22, 2006 (583d) |
| Aug 16, 2004 | WLK | ↑ Buy | 20,000 | $14.50 | $290K | By Mother | Sep 13, 2005 (393d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other WLK insiders
Open-market trades in the last 12 months
About Albert Chao's insider trades
Albert Chao is Executive Chairman at Westlake (WLK). Since Aug 16, 2004, Albert has reported 22 open-market purchases worth $5.7M and 21 sales worth $57.7M on SEC Form 4. In the last 12 months: 2 sales ($6.1M).
Their filings also include option exercises (34 filings), shares withheld for taxes (27 filings), grants and awards (25 filings), shares returned to the company (3 filings). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every WLK insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.