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WESTLAKE CORP

WLK Clue Score21
United States Fiscal year ends December CIK 0001262823
$62.29 -0.03% Close, 9 Oct 2026

Price, with every insider trade on it

Closing prices, 12 months · point at a dot for who traded, or at the line for the close
62.29 on 9 Oct 2026
123 90 56 Oct 2025 Apr 2026 Oct 2026 13 Oct 2025 $77.73 14 Oct 2025 $77.79 15 Oct 2025 $77.33 16 Oct 2025 $76.05 17 Oct 2025 $75.25 20 Oct 2025 $75.39 21 Oct 2025 $76.90 22 Oct 2025 $75.35 23 Oct 2025 $78.79 24 Oct 2025 $79.22 27 Oct 2025 $79.73 28 Oct 2025 $76.44 29 Oct 2025 $73.47 30 Oct 2025 $68.29 31 Oct 2025 $68.81 3 Nov 2025 $68.28 4 Nov 2025 $66.78 5 Nov 2025 $65.86 6 Nov 2025 $64.46 7 Nov 2025 $64.95 10 Nov 2025 $65.18 11 Nov 2025 $63.45 12 Nov 2025 $62.81 13 Nov 2025 $64.91 14 Nov 2025 $62.56 17 Nov 2025 $59.05 18 Nov 2025 $58.65 19 Nov 2025 $57.50 20 Nov 2025 $56.38 21 Nov 2025 $59.03 24 Nov 2025 $60.62 25 Nov 2025 $62.87 26 Nov 2025 $64.72 28 Nov 2025 $66.81 1 Dec 2025 $67.59 2 Dec 2025 $66.60 3 Dec 2025 $68.71 4 Dec 2025 $67.97 5 Dec 2025 $68.02 8 Dec 2025 $67.62 9 Dec 2025 $68.44 10 Dec 2025 $72.73 11 Dec 2025 $74.92 12 Dec 2025 $74.40 15 Dec 2025 $73.63 16 Dec 2025 $73.34 17 Dec 2025 $73.98 18 Dec 2025 $74.78 19 Dec 2025 $72.49 22 Dec 2025 $74.39 23 Dec 2025 $73.29 24 Dec 2025 $73.68 26 Dec 2025 $73.75 29 Dec 2025 $74.38 30 Dec 2025 $74.88 31 Dec 2025 $73.94 2 Jan 2026 $74.15 5 Jan 2026 $74.98 6 Jan 2026 $77.43 7 Jan 2026 $74.47 8 Jan 2026 $79.53 9 Jan 2026 $83.20 12 Jan 2026 $84.94 13 Jan 2026 $85.00 14 Jan 2026 $89.85 15 Jan 2026 $88.30 16 Jan 2026 $87.87 20 Jan 2026 $83.92 21 Jan 2026 $86.68 22 Jan 2026 $86.75 23 Jan 2026 $85.22 26 Jan 2026 $84.16 27 Jan 2026 $81.68 28 Jan 2026 $81.88 29 Jan 2026 $81.56 30 Jan 2026 $79.32 2 Feb 2026 $83.77 3 Feb 2026 $90.90 4 Feb 2026 $96.00 5 Feb 2026 $92.17 6 Feb 2026 $95.93 9 Feb 2026 $96.48 10 Feb 2026 $99.12 11 Feb 2026 $100.36 12 Feb 2026 $98.73 13 Feb 2026 $100.08 17 Feb 2026 $97.82 18 Feb 2026 $99.53 19 Feb 2026 $95.06 20 Feb 2026 $94.40 23 Feb 2026 $93.02 24 Feb 2026 $104.17 25 Feb 2026 $103.09 26 Feb 2026 $100.34 27 Feb 2026 $105.38 2 Mar 2026 $106.79 3 Mar 2026 $102.92 4 Mar 2026 $106.13 5 Mar 2026 $105.51 6 Mar 2026 $103.19 9 Mar 2026 $106.34 10 Mar 2026 $105.04 11 Mar 2026 $107.03 12 Mar 2026 $114.22 13 Mar 2026 $112.04 16 Mar 2026 $110.79 17 Mar 2026 $111.44 18 Mar 2026 $112.60 19 Mar 2026 $111.23 20 Mar 2026 $106.12 23 Mar 2026 $108.50 24 Mar 2026 $114.09 25 Mar 2026 $114.22 26 Mar 2026 $113.46 27 Mar 2026 $113.29 30 Mar 2026 $116.00 31 Mar 2026 $116.82 1 Apr 2026 $116.58 2 Apr 2026 $119.40 6 Apr 2026 $119.53 7 Apr 2026 $123.39 8 Apr 2026 $120.81 9 Apr 2026 $117.21 10 Apr 2026 $118.37 13 Apr 2026 $120.15 14 Apr 2026 $117.93 15 Apr 2026 $115.25 16 Apr 2026 $119.00 17 Apr 2026 $112.61 20 Apr 2026 $113.88 21 Apr 2026 $115.65 22 Apr 2026 $114.28 23 Apr 2026 $112.25 24 Apr 2026 $110.64 27 Apr 2026 $111.19 28 Apr 2026 $110.35 29 Apr 2026 $111.41 30 Apr 2026 $115.28 1 May 2026 $114.99 4 May 2026 $114.87 5 May 2026 $104.78 6 May 2026 $99.92 7 May 2026 $97.38 8 May 2026 $93.85 11 May 2026 $97.56 12 May 2026 $96.54 13 May 2026 $92.27 14 May 2026 $91.53 15 May 2026 $88.59 18 May 2026 $91.46 19 May 2026 $88.66 20 May 2026 $88.50 21 May 2026 $88.10 22 May 2026 $88.60 26 May 2026 $88.77 27 May 2026 $87.81 28 May 2026 $87.67 29 May 2026 $86.83 1 Jun 2026 $86.38 2 Jun 2026 $86.83 3 Jun 2026 $86.39 4 Jun 2026 $85.25 5 Jun 2026 $84.64 8 Jun 2026 $85.26 9 Jun 2026 $86.11 10 Jun 2026 $87.12 11 Jun 2026 $87.27 12 Jun 2026 $88.50 15 Jun 2026 $87.45 16 Jun 2026 $84.33 17 Jun 2026 $83.48 18 Jun 2026 $80.28 22 Jun 2026 $77.95 23 Jun 2026 $76.48 24 Jun 2026 $75.87 25 Jun 2026 $76.54 26 Jun 2026 $76.62 29 Jun 2026 $74.72 30 Jun 2026 $73.00 1 Jul 2026 $72.82 2 Jul 2026 $74.77 6 Jul 2026 $74.80 7 Jul 2026 $76.27 8 Jul 2026 $75.80 9 Jul 2026 $74.48 10 Jul 2026 $75.49 13 Jul 2026 $76.07 14 Jul 2026 $77.04 15 Jul 2026 $77.05 16 Jul 2026 $77.08 17 Jul 2026 $77.63 20 Jul 2026 $76.91 21 Jul 2026 $76.22 22 Jul 2026 $77.06 23 Jul 2026 $75.23 24 Jul 2026 $73.82 27 Jul 2026 $72.33 28 Jul 2026 $72.16 29 Jul 2026 $72.25 30 Jul 2026 $71.72 31 Jul 2026 $70.50 3 Aug 2026 $69.89 4 Aug 2026 $80.63 5 Aug 2026 $78.74 6 Aug 2026 $77.47 7 Aug 2026 $77.47 10 Aug 2026 $79.09 11 Aug 2026 $80.84 12 Aug 2026 $79.17 13 Aug 2026 $80.19 14 Aug 2026 $79.55 17 Aug 2026 $78.21 18 Aug 2026 $77.52 19 Aug 2026 $79.45 20 Aug 2026 $78.85 21 Aug 2026 $78.93 24 Aug 2026 $76.49 25 Aug 2026 $74.80 26 Aug 2026 $74.61 27 Aug 2026 $73.93 28 Aug 2026 $75.71 31 Aug 2026 $75.07 1 Sep 2026 $74.23 2 Sep 2026 $76.27 3 Sep 2026 $74.60 4 Sep 2026 $74.79 8 Sep 2026 $74.75 9 Sep 2026 $71.78 10 Sep 2026 $71.62 11 Sep 2026 $70.81 14 Sep 2026 $68.96 15 Sep 2026 $70.02 16 Sep 2026 $70.66 17 Sep 2026 $70.57 18 Sep 2026 $69.07 21 Sep 2026 $67.77 22 Sep 2026 $68.80 23 Sep 2026 $68.42 24 Sep 2026 $66.76 25 Sep 2026 $67.71 28 Sep 2026 $66.84 29 Sep 2026 $63.39 30 Sep 2026 $62.31 1 Oct 2026 $62.47 2 Oct 2026 $63.50 5 Oct 2026 $64.61 6 Oct 2026 $63.39 7 Oct 2026 $61.52 8 Oct 2026 $62.31 9 Oct 2026 $62.29 Chao Albert Executive Chairman Sold at will $3.00M 22 Dec 2025 · at $73.57 · 6.1% of stake Bender Mark Steven EVP & CFO Sold at will $1.76M 27 Feb 2026 · at $100.92 · 28.2% of stake Buesinger Robert F. EVP, PEM Segment Head Sold at will $461.00K 27 Mar 2026 · at $115.25 · 10.4% of stake Bender Mark Steven EVP & CFO Sold at will $1.85M 27 Mar 2026 · at $112.54 · 36.9% of stake Chao Albert Executive Chairman Sold at will $3.12M 11 Aug 2026 · at $80.28 · 5.7% of stake
0 buys5 sales at will0 planned sales

Key numbers

Fiscal year 2025, ended 31 Dec 2025, as filed
Revenue
$11.17B
Net income
$1.51B
Free cash flow
$530.00M
Gross margin
7.3%
Operating margin
-14.1%
Net margin
-13.5%
Return on equity
-17.2%
Return on capital
-8.7%
Debt to equity
0.64
Revenue growth, 1 yr
-8.0%
Revenue growth, 5 yr
8.3% a year

Revenue and profit

Fiscal years, as filed with the SEC · point at a year for the detail
Full statements →
7.5B 330M FY20 Fiscal year 2020 Revenue $7.50B Net income $330.00M Margin 4.4% 11.8B 2B FY21 Fiscal year 2021 Revenue $11.78B Net income $2.02B Margin 17.1% · growth +57.0% 15.8B 2.2B FY22 Fiscal year 2022 Revenue $15.79B Net income $2.25B Margin 14.2% · growth +34.1% 12.5B 479M FY23 Fiscal year 2023 Revenue $12.55B Net income $479.00M Margin 3.8% · growth -20.6% 12.1B 602M FY24 Fiscal year 2024 Revenue $12.14B Net income $602.00M Margin 5.0% · growth -3.2% 11.2B -1.5B FY25 Fiscal year 2025 Revenue $11.17B Net income $1.51B Margin -13.5% · growth -8.0%
RevenueNet incomeLoss

Latest insider transactions

From Form 4, most recent first
All of them →
DateInsiderTypeValueOf own stake
11 Aug 2026 Chao Albert
Executive Chairman
Sold at will $3.12M 5.7%
27 Mar 2026 Bender Mark Steven
EVP & CFO
Sold at will $1.85M 36.9%
27 Mar 2026 Buesinger Robert F.
EVP, PEM Segment Head
Sold at will $461.00K 10.4%
27 Feb 2026 Bender Mark Steven
EVP & CFO
Sold at will $1.76M 28.2%
22 Dec 2025 Chao Albert
Executive Chairman
Sold at will $3.00M 6.1%
27 May 2025 Buesinger Robert F.
EVP, PEM Segment Head
Sold at will $6.03K 100%