WLK
Westlake Chemical Corporation
NYSE: WLK · BASIC MATERIALS · SPECIALTY CHEMICALS
$111.41
+0.96% today
Updated 2026-04-29
Market cap
$14.27B
P/E ratio
—
P/S ratio
1.28x
EPS (TTM)
$-11.70
Dividend yield
1.91%
52W range
$56 – $124
Volume
1.2M
Westlake Chemical Corporation (WLK) Insider transactions
Net insider activity
Net buying (267,388 shares)
Buy transactions
53
Sell transactions
47
All transactions
| Date | Insider | Title | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-04-02 | POWERS, BRIAN JOHN | SVP, PEM Segment Head | Buy | 1,961 | — | — |
| 2026-03-27 | BUESINGER, ROBERT F. | EVP, PEM Segment Head | Sale | 4,000 | $115.25 | $461000.00 |
| 2026-03-27 | BENDER, MARK STEVEN | EVP & CFO | Sale | 16,413 | $112.54 | $1.85M |
| 2026-02-27 | BENDER, MARK STEVEN | EVP & CFO | Sale | 6,494 | — | — |
| 2026-02-27 | BENDER, MARK STEVEN | EVP & CFO | Sale | 6,199 | — | — |
| 2026-02-27 | BENDER, MARK STEVEN | EVP & CFO | Sale | 16,988 | $100.91 | $1.71M |
| 2026-02-27 | BENDER, MARK STEVEN | EVP & CFO | Sale | 12,693 | $98.20 | $1.25M |
| 2026-02-27 | BENDER, MARK STEVEN | EVP & CFO | Buy | 6,494 | $86.54 | $561977.12 |
| 2026-02-27 | BENDER, MARK STEVEN | EVP & CFO | Buy | 6,199 | $65.81 | $407971.69 |
| 2026-02-27 | BENDER, MARK STEVEN | EVP & CFO | Sale | 421 | $101.52 | $42737.82 |
| 2026-02-20 | SZWEJBKA, SCOTT THOMAS | SVP, HIP Segment Head | Buy | 3,983 | — | — |
| 2026-02-20 | SZWEJBKA, SCOTT THOMAS | SVP, HIP Segment Head | Buy | 14,595 | — | — |
| 2026-02-20 | SZWEJBKA, SCOTT THOMAS | SVP, HIP Segment Head | Sale | 91 | $94.10 | $8563.10 |
| 2026-02-20 | PATEL, BHAVESH V. | Director | Buy | 1,852 | — | — |
| 2026-02-20 | HOLY, JEFFREY ADAM | VP and CAO | Buy | 2,540 | — | — |
| 2026-02-20 | HOLY, JEFFREY ADAM | VP and CAO | Buy | 1,199 | — | — |
| 2026-02-20 | HOLY, JEFFREY ADAM | VP and CAO | Buy | 4,394 | — | — |
| 2026-02-20 | HOLY, JEFFREY ADAM | VP and CAO | Sale | 81 | $94.10 | $7622.10 |
| 2026-02-20 | GILSON, JEAN-MARC | President and CEO | Buy | 29,784 | — | — |
| 2026-02-20 | GILSON, JEAN-MARC | President and CEO | Buy | 109,139 | — | — |
| 2026-02-20 | EDERINGTON, L. BENJAMIN | EVP, Legal & External Affairs | Buy | 7,002 | — | — |
| 2026-02-20 | EDERINGTON, L. BENJAMIN | EVP, Legal & External Affairs | Buy | 25,656 | — | — |
| 2026-02-20 | EDERINGTON, L. BENJAMIN | EVP, Legal & External Affairs | Sale | 357 | $94.10 | $33594.41 |
| 2026-02-20 | CHAO, JOHN TSUNG-CHEN | Director | Buy | 2,434 | — | — |
| 2026-02-20 | CHAO, JOHN TSUNG-CHEN | Director | Buy | 1,104 | — | — |
| 2026-02-20 | CHAO, JOHN TSUNG-CHEN | Director | Buy | 4,044 | — | — |
| 2026-02-20 | CHAO, JOHN TSUNG-CHEN | Director | Sale | 91 | $94.10 | $8563.10 |
| 2026-02-20 | CHAO, JAMES | Director, Senior Chairman | Buy | 7,472 | — | — |
| 2026-02-20 | CHAO, JAMES | Director, Senior Chairman | Buy | 27,382 | — | — |
| 2026-02-20 | CHAO, JAMES | Director, Senior Chairman | Sale | 1,569 | $94.10 | $147644.47 |
| 2026-02-20 | CHAO, ALBERT | Director, Executive Chairman | Buy | 14,945 | — | — |
| 2026-02-20 | CHAO, ALBERT | Director, Executive Chairman | Buy | 54,763 | — | — |
| 2026-02-20 | CHAO, ALBERT | Director, Executive Chairman | Sale | 2,501 | $94.10 | $235346.60 |
| 2026-02-20 | BUESINGER, ROBERT F. | EVP, PEM Segment Head | Buy | 5,281 | — | — |
| 2026-02-20 | BUESINGER, ROBERT F. | EVP, PEM Segment Head | Buy | 19,351 | — | — |
| 2026-02-20 | BUESINGER, ROBERT F. | EVP, PEM Segment Head | Sale | 326 | $94.10 | $30676.93 |
| 2026-02-20 | BENDER, MARK STEVEN | EVP & CFO | Buy | 7,747 | — | — |
| 2026-02-20 | BENDER, MARK STEVEN | EVP & CFO | Buy | 28,389 | — | — |
| 2026-02-20 | BENDER, MARK STEVEN | EVP & CFO | Sale | 445 | $94.10 | $41874.06 |
| 2026-02-19 | SZWEJBKA, SCOTT THOMAS | SVP, HIP Segment Head | Buy | 365 | — | — |
| 2026-02-19 | HOLY, JEFFREY ADAM | VP and CAO | Buy | 264 | — | — |
| 2026-02-19 | EDERINGTON, L. BENJAMIN | EVP, Legal & External Affairs | Buy | 1,425 | — | — |
| 2026-02-19 | CHAO, JOHN TSUNG-CHEN | Director | Buy | 213 | — | — |
| 2026-02-19 | CHAO, JAMES | Director, Senior Chairman | Buy | 3,884 | — | — |
| 2026-02-19 | CHAO, ALBERT | Director, Executive Chairman | Buy | 6,193 | — | — |
| 2026-02-19 | BUESINGER, ROBERT F. | EVP, PEM Segment Head | Buy | 1,301 | — | — |
| 2026-02-19 | BENDER, MARK STEVEN | EVP & CFO | Buy | 1,777 | — | — |
| 2026-02-18 | SZWEJBKA, SCOTT THOMAS | SVP, HIP Segment Head | Sale | 295 | $98.95 | $29190.25 |
| 2026-02-18 | HOLY, JEFFREY ADAM | VP and CAO | Sale | 213 | $98.95 | $21076.35 |
| 2026-02-18 | EDERINGTON, L. BENJAMIN | EVP, Legal & External Affairs | Sale | 978 | $98.95 | $96773.10 |
| 2026-02-18 | CHAO, JOHN TSUNG-CHEN | Director | Sale | 242 | $98.95 | $23945.90 |
| 2026-02-18 | CHAO, JAMES | Director, Senior Chairman | Sale | 2,664 | $98.95 | $263602.80 |
| 2026-02-18 | CHAO, ALBERT | Director, Executive Chairman | Sale | 5,089 | $98.95 | $503556.55 |
| 2026-02-18 | BUESINGER, ROBERT F. | EVP, PEM Segment Head | Sale | 903 | $98.95 | $89351.85 |
| 2026-02-18 | BENDER, MARK STEVEN | EVP & CFO | Sale | 1,209 | $98.95 | $119630.55 |
| 2026-02-17 | SZWEJBKA, SCOTT THOMAS | SVP, HIP Segment Head | Sale | 977 | — | — |
| 2026-02-17 | SZWEJBKA, SCOTT THOMAS | SVP, HIP Segment Head | Buy | 977 | — | — |
| 2026-02-17 | HOLY, JEFFREY ADAM | VP and CAO | Sale | 706 | — | — |
| 2026-02-17 | HOLY, JEFFREY ADAM | VP and CAO | Buy | 706 | — | — |
| 2026-02-17 | EDERINGTON, L. BENJAMIN | EVP, Legal & External Affairs | Sale | 3,809 | — | — |
| 2026-02-17 | EDERINGTON, L. BENJAMIN | EVP, Legal & External Affairs | Buy | 3,809 | — | — |
| 2026-02-17 | CHAO, JOHN TSUNG-CHEN | Director | Sale | 570 | — | — |
| 2026-02-17 | CHAO, JOHN TSUNG-CHEN | Director | Buy | 570 | — | — |
| 2026-02-17 | CHAO, JAMES | Director, Senior Chairman | Sale | 10,382 | — | — |
| 2026-02-17 | CHAO, JAMES | Director, Senior Chairman | Buy | 10,382 | — | — |
| 2026-02-17 | CHAO, ALBERT | Director, Executive Chairman | Sale | 16,555 | — | — |
| 2026-02-17 | CHAO, ALBERT | Director, Executive Chairman | Buy | 16,555 | — | — |
| 2026-02-17 | BUESINGER, ROBERT F. | EVP, PEM Segment Head | Sale | 3,478 | — | — |
| 2026-02-17 | BUESINGER, ROBERT F. | EVP, PEM Segment Head | Buy | 3,478 | — | — |
| 2026-02-17 | BENDER, MARK STEVEN | EVP & CFO | Sale | 4,751 | — | — |
| 2026-02-17 | BENDER, MARK STEVEN | EVP & CFO | Buy | 4,751 | — | — |
| 2025-12-22 | CHAO, ALBERT | Director, Executive Chairman | Sale | 81,673 | — | — |
| 2025-12-22 | CHAO, ALBERT | Director, Executive Chairman | Buy | 81,673 | $44.42 | $3.63M |
| 2025-12-22 | CHAO, ALBERT | Director, Executive Chairman | Sale | 30,604 | $73.80 | $2.26M |
| 2025-12-22 | CHAO, ALBERT | Director, Executive Chairman | Sale | 9,711 | $72.82 | $707135.60 |
| 2025-12-22 | CHAO, ALBERT | Director, Executive Chairman | Sale | 521 | $74.44 | $38784.80 |
| 2025-12-10 | CREGG, ROGER A | Director | Sale | 1,339 | — | — |
| 2025-12-10 | CREGG, ROGER A | Director | Buy | 1,339 | — | — |
| 2025-10-02 | SZWEJBKA, SCOTT THOMAS | SVP, HIP Segment Head | Sale | 3,842 | $76.70 | $294681.40 |
| 2025-10-01 | SZWEJBKA, SCOTT THOMAS | SVP, HIP Segment Head | Sale | 10,840 | — | — |
| 2025-10-01 | SZWEJBKA, SCOTT THOMAS | SVP, HIP Segment Head | Buy | 10,840 | — | — |
| 2025-08-28 | CHAO, JAMES | Director, Senior Chairman | Sale | 15,140 | — | — |
| 2025-08-09 | SHEETS, JEFFREY WAYNE | Director | Sale | 1,128 | — | — |
| 2025-08-09 | SHEETS, JEFFREY WAYNE | Director | Buy | 1,128 | — | — |
| 2025-08-09 | SABAT, CAROLYN CHAO | Director | Sale | 1,128 | — | — |
| 2025-08-09 | SABAT, CAROLYN CHAO | Director | Buy | 1,128 | — | — |
| 2025-08-09 | NORTHCUTT, R BRUCE | Director | Sale | 1,128 | — | — |
| 2025-08-09 | NORTHCUTT, R BRUCE | Director | Buy | 1,128 | — | — |
| 2025-08-09 | MCCOLLUM, MARK A | Director | Sale | 1,128 | — | — |
| 2025-08-09 | MCCOLLUM, MARK A | Director | Buy | 1,128 | — | — |
| 2025-08-09 | LUBEL, KIMBERLY S | Director | Sale | 1,128 | — | — |
| 2025-08-09 | LUBEL, KIMBERLY S | Director | Buy | 1,128 | — | — |
| 2025-08-09 | GRAFF, MICHAEL J | Director | Sale | 1,128 | — | — |
| 2025-08-09 | GRAFF, MICHAEL J | Director | Buy | 1,128 | — | — |
| 2025-08-09 | CHAO, DAVID TSUNG-HUNG | Director | Sale | 1,128 | — | — |
| 2025-08-09 | CHAO, DAVID TSUNG-HUNG | Director | Buy | 1,128 | — | — |
| 2025-08-09 | CHAO, CATHERINE T. | Director | Sale | 1,128 | — | — |
| 2025-08-09 | CHAO, CATHERINE T. | Director | Buy | 1,128 | — | — |
| 2025-08-08 | SHEETS, JEFFREY WAYNE | Director | Buy | 2,168 | — | — |
| 2025-08-08 | SABAT, CAROLYN CHAO | Director | Buy | 2,168 | — | — |