Robert F. Buesinger 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 Robert reports to the SEC
Open-market buys and sales
27 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Mar 27, 2026 | WLK | ↓ Sell | 4,000 | $115.25 | $461K | Direct | Mar 31, 2026 (4d) |
| May 27, 2025 | WLK | ↓ Sell | 83 | $72.70 | $6K | by trust | Jun 9, 2025 (13d) |
| Apr 22, 2025 | WLK | ↑ Buy | 83 | $93.39 | $8K | by trust | Jun 9, 2025 (48d) |
| May 9, 2024 | WLK | ↓ Sell | 3,500 | $158.50 | $555K | Direct | May 13, 2024 (4d) |
| Mar 15, 2024 | WLK | ↓ Sell | 3,878 | $144.50 | $560K | Direct | Mar 18, 2024 (3d) |
| Mar 13, 2024 | WLK | ↓ Sell | 122 | $144.50 | $18K | Direct | Mar 14, 2024 (1d) |
| Nov 15, 2023 | WLK | ↓ Sell | 4,215 | $130.50 | $550K | Direct | Nov 17, 2023 (2d) |
| Aug 31, 2022 | WLK | ↓ Sell | 1,000 | $98.94 | $99K | Direct | Sep 1, 2022 (1d) |
| May 27, 2022 | WLK | ↓ Sell | 14,427 | $129.47 | $1.9M | Direct | May 31, 2022 (4d) |
| Mar 10, 2022 | WLK | ↓ Sell | 22,555 | $117.61 | $2.7M | Direct | Mar 14, 2022 (4d) |
| Mar 9, 2022 | WLK | ↓ Sell | 2,730 | $115.55 | $315K | Direct | Mar 10, 2022 (1d) |
| May 10, 2021 | WLK | ↓ Sell | 5,000 | $105.00 | $525K | Direct | May 11, 2021 (1d) |
| Mar 8, 2021 | WLK | ↓ Sell | 16,513 | $93.69 | $1.5M | Direct | Mar 9, 2021 (1d) |
| Nov 24, 2020 | WLK | ↓ Sell | 4,581 | $77.50 | $355K | Direct | Nov 25, 2020 (1d) |
| May 15, 2018 | WLK | ↓ Sell | 1,447 | $118.88 | $172K | Direct | May 16, 2018 (1d) |
| Mar 5, 2018 | WLK | ↓ Sell | 19,349 | $113.04 | $2.2M | Direct | Mar 6, 2018 (1d) |
| Dec 1, 2017 | WLK | ↓ Sell | 2,674 | $98.50 | $263K | Direct | Dec 4, 2017 (3d) |
| Nov 17, 2017 | WLK | ↓ Sell | 5,214 | $93.82 | $489K | Direct | Nov 20, 2017 (3d) |
| Mar 1, 2017 | WLK | ↓ Sell | 8,193 | $66.25 | $543K | Direct | Mar 3, 2017 (2d) |
| Nov 10, 2016 | WLK | ↓ Sell | 2,880 | $54.42 | $157K | Direct | Nov 14, 2016 (4d) |
| May 7, 2014 | WLK | ↓ Sell | 1,872 | $77.36 | $145K | Direct | May 8, 2014 (1d) |
| Feb 26, 2014 | WLK | ↓ Sell | 2,361 | $132.95 | $314K | Direct | Feb 27, 2014 (1d) |
| May 8, 2013 | WLK | ↓ Sell | 1,478 | $90.97 | $134K | Direct | May 10, 2013 (2d) |
| Mar 11, 2013 | WLK | ↓ Sell | 2,361 | $93.79 | $221K | Direct | Mar 13, 2013 (2d) |
| Dec 10, 2012 | WLK | ↓ Sell | 922 | $75.68 | $70K | Direct | Dec 12, 2012 (2d) |
| Aug 6, 2012 | WLK | ↓ Sell | 1,478 | $67.16 | $99K | Direct | Aug 8, 2012 (2d) |
| May 19, 2011 | WLK | ↓ Sell | 1,477 | $55.40 | $82K | Direct | Aug 5, 2011 (78d) |
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 Robert F. Buesinger's insider trades
Robert F. Buesinger is EVP, PEM Segment Head at Westlake (WLK). Since May 19, 2011, Robert has reported 1 open-market purchase worth $8K and 26 sales worth $14.4M on SEC Form 4. In the last 12 months: 1 sale ($461K).
Their filings also include option exercises (34 filings), grants and awards (25 filings), shares withheld for taxes (22 filings), shares returned to the company (4 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.