Westlake Corp (WLK) stock
WLKNYSEIndustrial Organic ChemicalsFiscal year ends December 31
Financials through Q2 FY2026, quarter ended Jun 30, 2026Last filing: 10-Q on Aug 5, 2026Score 9/3039% below fair value
$68.28+2.27 (+3.44%)
Close on Oct 30, 2026Market cap $8.73BP/E –Yield 3.09%
Price history
Westlake share prices for every trading day, newest first. Adjusted for stock splits, not for dividends.
Close, Oct 30, 2026
$68.28
+3.44% on the day
52-week range
$56.33 – $124.23
-45.0% from the high
Change over 52 weeks
-0.0%
From $68.29 on Oct 30, 2025
Average volume
977,424
Shares a day, last 90 sessions
| Date | Open | High | Low | Close | Change | Volume |
|---|---|---|---|---|---|---|
| Oct 30, 2026 | $66.08 | $68.35 | $66.08 | $68.28 | +3.44% | 1,182,050 |
| Oct 29, 2026 | $66.16 | $67.79 | $65.01 | $66.01 | +0.27% | 915,930 |
| Oct 28, 2026 | $66.02 | $66.63 | $65.10 | $65.83 | -0.51% | 693,897 |
| Oct 27, 2026 | $65.06 | $66.56 | $65.06 | $66.17 | +1.32% | 954,161 |
| Oct 26, 2026 | $64.56 | $66.91 | $64.56 | $65.31 | +1.16% | 960,893 |
| Oct 23, 2026 | $64.12 | $65.29 | $63.50 | $64.56 | +0.65% | 1,033,322 |
| Oct 22, 2026 | $61.20 | $64.40 | $60.71 | $64.14 | +5.42% | 1,279,025 |
| Oct 21, 2026 | $62.85 | $63.25 | $60.36 | $60.84 | -2.95% | 1,129,766 |
| Oct 20, 2026 | $62.63 | $62.98 | $61.72 | $62.69 | +0.64% | 599,967 |
| Oct 19, 2026 | $63.16 | $63.32 | $61.97 | $62.29 | -1.64% | 501,851 |
| Oct 16, 2026 | $63.65 | $64.39 | $62.08 | $63.33 | -0.44% | 775,526 |
| Oct 15, 2026 | $62.67 | $64.10 | $61.70 | $63.61 | +2.25% | 701,321 |
| Oct 14, 2026 | $61.50 | $62.36 | $61.00 | $62.21 | +0.57% | 831,256 |
| Oct 13, 2026 | $62.11 | $63.33 | $61.72 | $61.86 | +0.02% | 740,700 |
| Oct 12, 2026 | $61.86 | $62.32 | $60.99 | $61.85 | -0.71% | 987,637 |
| Oct 9, 2026 | $62.39 | $62.79 | $61.68 | $62.29 | -0.03% | 766,077 |
| Oct 8, 2026 | $61.50 | $62.35 | $60.78 | $62.31 | +1.28% | 1,166,571 |
| Oct 7, 2026 | $62.83 | $63.18 | $59.84 | $61.52 | -2.95% | 1,152,539 |
| Oct 6, 2026 | $64.56 | $64.80 | $63.07 | $63.39 | -1.89% | 916,744 |
| Oct 5, 2026 | $63.24 | $65.86 | $62.28 | $64.61 | +1.75% | 1,064,144 |
| Oct 2, 2026 | $62.67 | $64.92 | $61.80 | $63.50 | +1.65% | 1,505,008 |
| Oct 1, 2026 | $60.66 | $62.55 | $58.95 | $62.47 | +0.26% | 2,169,382 |
| Sep 30, 2026 | $63.01 | $63.61 | $62.30 | $62.31 | -1.70% | 1,283,403 |
| Sep 29, 2026 | $65.59 | $65.59 | $62.70 | $63.39 | -5.16% | 1,498,848 |
| Sep 28, 2026 | $67.65 | $67.75 | $66.31 | $66.84 | -1.28% | 444,194 |
| Sep 25, 2026 | $66.44 | $67.75 | $65.66 | $67.71 | +1.42% | 645,760 |
| Sep 24, 2026 | $68.40 | $68.56 | $66.72 | $66.76 | -2.43% | 585,327 |
| Sep 23, 2026 | $68.97 | $69.39 | $68.35 | $68.42 | -0.55% | 504,874 |
| Sep 22, 2026 | $67.98 | $70.30 | $67.84 | $68.80 | +1.52% | 694,650 |
| Sep 21, 2026 | $69.40 | $69.42 | $67.74 | $67.77 | -1.88% | 576,338 |
| Sep 18, 2026 | $70.03 | $70.07 | $68.74 | $69.07 | -2.13% | 721,354 |
| Sep 17, 2026 | $71.26 | $71.62 | $69.83 | $70.57 | -0.13% | 485,066 |
| Sep 16, 2026 | $69.81 | $71.63 | $69.39 | $70.66 | +0.91% | 537,403 |
| Sep 15, 2026 | $68.84 | $70.18 | $68.55 | $70.02 | +1.54% | 864,510 |
| Sep 14, 2026 | $71.05 | $72.48 | $68.63 | $68.96 | -2.61% | 976,506 |
| Sep 11, 2026 | $71.94 | $72.50 | $70.44 | $70.81 | -1.13% | 533,798 |
| Sep 10, 2026 | $71.87 | $73.75 | $70.69 | $71.62 | -0.22% | 891,887 |
| Sep 9, 2026 | $72.70 | $73.39 | $70.74 | $71.78 | -3.97% | 846,698 |
| Sep 8, 2026 | $75.56 | $76.14 | $74.63 | $74.75 | -0.05% | 561,116 |
| Sep 4, 2026 | $74.05 | $75.56 | $73.73 | $74.79 | +0.25% | 570,445 |
| Sep 3, 2026 | $77.19 | $77.45 | $74.51 | $74.60 | -2.19% | 594,987 |
| Sep 2, 2026 | $73.60 | $76.82 | $73.60 | $76.27 | +2.75% | 737,251 |
| Sep 1, 2026 | $75.02 | $75.59 | $73.45 | $74.23 | -1.12% | 577,002 |
| Aug 31, 2026 | $76.05 | $76.52 | $74.28 | $75.07 | -0.85% | 561,714 |
| Aug 28, 2026 | $74.72 | $76.02 | $73.92 | $75.71 | +2.41% | 750,754 |
| Aug 27, 2026 | $74.22 | $74.78 | $72.91 | $73.93 | -0.91% | 586,222 |
| Aug 26, 2026 | $74.47 | $74.93 | $72.90 | $74.61 | -0.25% | 819,336 |
| Aug 25, 2026 | $75.52 | $75.67 | $74.60 | $74.80 | -2.21% | 536,472 |
| Aug 24, 2026 | $78.67 | $79.18 | $76.19 | $76.49 | -3.09% | 630,392 |
| Aug 21, 2026 | $79.13 | $80.09 | $78.81 | $78.93 | +0.10% | 746,214 |
| Aug 20, 2026 | $78.58 | $80.19 | $78.01 | $78.85 | -0.76% | 681,441 |
| Aug 19, 2026 | $78.39 | $80.58 | $77.66 | $79.45 | +2.49% | 772,162 |
| Aug 18, 2026 | $78.28 | $79.04 | $76.45 | $77.52 | -0.88% | 865,076 |
| Aug 17, 2026 | $79.05 | $79.50 | $77.31 | $78.21 | -1.68% | 943,229 |
| Aug 14, 2026 | $80.66 | $80.86 | $79.37 | $79.55 | -0.80% | 834,151 |
| Aug 13, 2026 | $78.49 | $80.35 | $78.00 | $80.19 | +1.29% | 617,876 |
| Aug 12, 2026 | $80.38 | $80.41 | $78.03 | $79.17 | -2.07% | 734,238 |
| Aug 11, 2026 | $78.82 | $80.98 | $78.82 | $80.84 | +2.21% | 1,023,728 |
| Aug 10, 2026 | $77.26 | $79.31 | $76.62 | $79.09 | +2.09% | 1,298,027 |
| Aug 7, 2026 | $76.95 | $79.15 | $76.33 | $77.47 | 0.00% | 918,774 |
| Aug 6, 2026 | $79.77 | $80.57 | $77.35 | $77.47 | -1.61% | 906,624 |
| Aug 5, 2026 | $79.42 | $79.77 | $75.48 | $78.74 | -2.34% | 1,786,782 |
| Aug 4, 2026 | $72.86 | $80.64 | $72.72 | $80.63 | +15.37% | 3,009,323 |
| Aug 3, 2026 | $70.16 | $71.00 | $68.70 | $69.89 | -0.87% | 2,219,119 |
| Jul 31, 2026 | $71.03 | $71.50 | $68.48 | $70.50 | -1.70% | 1,501,496 |
| Jul 30, 2026 | $72.52 | $72.89 | $70.98 | $71.72 | -0.73% | 1,377,600 |
| Jul 29, 2026 | $72.88 | $73.01 | $71.26 | $72.25 | +0.12% | 1,404,131 |
| Jul 28, 2026 | $73.17 | $74.32 | $71.89 | $72.16 | -0.24% | 894,855 |
| Jul 27, 2026 | $73.22 | $73.54 | $71.86 | $72.33 | -2.02% | 1,340,531 |
| Jul 24, 2026 | $75.10 | $75.10 | $73.44 | $73.82 | -1.87% | 1,198,656 |
| Jul 23, 2026 | $78.17 | $78.33 | $74.70 | $75.23 | -2.37% | 772,138 |
| Jul 22, 2026 | $76.98 | $77.99 | $76.14 | $77.06 | +1.10% | 895,412 |
| Jul 21, 2026 | $77.26 | $77.35 | $75.34 | $76.22 | -0.90% | 908,270 |
| Jul 20, 2026 | $77.08 | $77.69 | $76.00 | $76.91 | -0.93% | 542,075 |
| Jul 17, 2026 | $78.20 | $79.84 | $77.08 | $77.63 | +0.71% | 591,959 |
| Jul 16, 2026 | $76.47 | $78.17 | $76.44 | $77.08 | +0.04% | 549,860 |
| Jul 15, 2026 | $76.50 | $77.61 | $76.07 | $77.05 | +0.01% | 589,112 |
| Jul 14, 2026 | $77.10 | $78.00 | $75.28 | $77.04 | +1.28% | 759,650 |
| Jul 13, 2026 | $76.71 | $78.07 | $75.29 | $76.07 | +0.77% | 941,927 |
| Jul 10, 2026 | $75.30 | $75.76 | $74.67 | $75.49 | +1.36% | 774,141 |
| Jul 9, 2026 | $75.22 | $76.26 | $74.28 | $74.48 | -1.74% | 877,961 |
| Jul 8, 2026 | $77.72 | $78.60 | $75.76 | $75.80 | -0.62% | 1,401,474 |
| Jul 7, 2026 | $75.04 | $77.13 | $74.82 | $76.27 | +1.97% | 1,836,081 |
| Jul 6, 2026 | $73.95 | $75.27 | $72.71 | $74.80 | +0.04% | 1,366,672 |
| Jul 2, 2026 | $72.88 | $75.13 | $72.88 | $74.77 | +2.68% | 1,381,772 |
| Jul 1, 2026 | $71.86 | $74.26 | $71.23 | $72.82 | -0.25% | 1,844,472 |
| Jun 30, 2026 | $74.68 | $75.21 | $72.71 | $73.00 | -2.30% | 1,039,691 |
| Jun 29, 2026 | $76.44 | $76.53 | $73.73 | $74.72 | -2.48% | 1,322,216 |
| Jun 26, 2026 | $76.00 | $77.18 | $75.58 | $76.62 | +0.10% | 1,570,093 |
| Jun 25, 2026 | $75.25 | $76.81 | $74.66 | $76.54 | +0.88% | 1,885,093 |
| Jun 24, 2026 | $75.74 | $76.67 | $73.77 | $75.87 | -0.80% | 2,043,335 |
| Jun 23, 2026 | $77.37 | $78.32 | $76.26 | $76.48 | -1.89% | 988,310 |
| Jun 22, 2026 | $79.29 | $79.70 | $77.27 | $77.95 | -2.90% | 1,025,440 |
| Jun 18, 2026 | $82.94 | $83.09 | $80.09 | $80.28 | -3.83% | 1,731,737 |
| Jun 17, 2026 | $83.67 | $87.27 | $83.23 | $83.48 | -1.01% | 736,444 |
| Jun 16, 2026 | $86.89 | $87.66 | $83.92 | $84.33 | -3.57% | 1,121,500 |
| Jun 15, 2026 | $87.65 | $88.76 | $86.16 | $87.45 | -1.19% | 620,688 |
| Jun 12, 2026 | $87.45 | $89.47 | $86.53 | $88.50 | +1.41% | 770,813 |
| Jun 11, 2026 | $88.43 | $89.23 | $86.43 | $87.27 | +0.17% | 531,733 |
| Jun 10, 2026 | $86.50 | $88.99 | $85.81 | $87.12 | +1.17% | 1,179,550 |
| Jun 9, 2026 | $85.63 | $86.92 | $84.38 | $86.11 | +1.00% | 1,184,300 |
| Jun 8, 2026 | $84.38 | $85.78 | $83.75 | $85.26 | +0.73% | 914,802 |
| Jun 5, 2026 | $84.29 | $85.34 | $82.98 | $84.64 | -0.72% | 826,296 |
| Jun 4, 2026 | $86.29 | $87.04 | $84.37 | $85.25 | -1.32% | 781,633 |
| Jun 3, 2026 | $86.46 | $87.90 | $85.75 | $86.39 | -0.51% | 867,250 |
| Jun 2, 2026 | $86.31 | $87.93 | $85.89 | $86.83 | +0.52% | 722,187 |
| Jun 1, 2026 | $87.50 | $88.99 | $86.34 | $86.38 | -0.52% | 916,664 |
| May 29, 2026 | $87.50 | $87.81 | $86.08 | $86.83 | -0.96% | 916,398 |
| May 28, 2026 | $87.45 | $88.70 | $87.14 | $87.67 | -0.16% | 857,548 |
| May 27, 2026 | $86.91 | $89.37 | $86.39 | $87.81 | -1.08% | 1,072,530 |
| May 26, 2026 | $88.77 | $89.39 | $88.06 | $88.77 | +0.19% | 693,367 |
| May 22, 2026 | $88.76 | $89.98 | $87.14 | $88.60 | +0.57% | 829,666 |
| May 21, 2026 | $88.73 | $89.13 | $86.54 | $88.10 | -0.45% | 873,287 |
| May 20, 2026 | $88.47 | $89.49 | $87.75 | $88.50 | -0.18% | 926,367 |
| May 19, 2026 | $91.23 | $91.23 | $88.15 | $88.66 | -3.06% | 1,098,982 |
| May 18, 2026 | $90.22 | $93.18 | $88.57 | $91.46 | +3.24% | 1,473,497 |
| May 15, 2026 | $91.19 | $91.53 | $88.33 | $88.59 | -3.21% | 1,870,441 |
| May 14, 2026 | $93.65 | $94.39 | $91.50 | $91.53 | -0.80% | 1,000,368 |
| May 13, 2026 | $97.34 | $98.30 | $92.22 | $92.27 | -4.42% | 1,364,456 |
| May 12, 2026 | $99.02 | $99.51 | $96.44 | $96.54 | -1.05% | 1,018,518 |
| May 11, 2026 | $94.88 | $98.95 | $93.86 | $97.56 | +3.95% | 1,499,188 |
| May 8, 2026 | $97.88 | $98.47 | $93.42 | $93.85 | -3.62% | 1,404,939 |
| May 7, 2026 | $98.95 | $100.05 | $97.10 | $97.38 | -2.54% | 1,413,971 |
| May 6, 2026 | $99.48 | $102.57 | $98.66 | $99.92 | -4.64% | 2,170,984 |
| May 5, 2026 | $102.70 | $106.93 | $101.23 | $104.78 | -8.78% | 1,799,940 |
| May 4, 2026 | $115.52 | $116.26 | $112.40 | $114.87 | -0.10% | 1,204,703 |
| May 1, 2026 | $115.75 | $117.05 | $114.78 | $114.99 | -0.25% | 1,162,016 |
| Apr 30, 2026 | $111.49 | $115.71 | $111.19 | $115.28 | +3.47% | 940,622 |
| Apr 29, 2026 | $112.09 | $112.48 | $110.48 | $111.41 | +0.96% | 929,972 |
| Apr 28, 2026 | $112.41 | $112.86 | $109.14 | $110.35 | -0.76% | 692,833 |
| Apr 27, 2026 | $111.91 | $113.66 | $109.42 | $111.19 | +0.50% | 794,561 |
| Apr 24, 2026 | $112.00 | $113.49 | $109.68 | $110.64 | -1.43% | 1,052,389 |
| Apr 23, 2026 | $114.35 | $115.60 | $110.58 | $112.25 | -1.78% | 982,944 |
| Apr 22, 2026 | $117.47 | $117.66 | $113.50 | $114.28 | -1.18% | 1,087,671 |
| Apr 21, 2026 | $112.93 | $115.88 | $112.15 | $115.65 | +1.55% | 854,582 |
| Apr 20, 2026 | $111.72 | $115.60 | $111.72 | $113.88 | +1.13% | 885,685 |
| Apr 17, 2026 | $114.00 | $114.51 | $110.79 | $112.61 | -5.37% | 1,491,705 |
| Apr 16, 2026 | $116.73 | $119.23 | $116.41 | $119.00 | +3.25% | 1,084,441 |
| Apr 15, 2026 | $118.13 | $118.41 | $114.43 | $115.25 | -2.27% | 951,543 |
| Apr 14, 2026 | $119.49 | $119.97 | $115.01 | $117.93 | -1.85% | 935,330 |
| Apr 13, 2026 | $120.00 | $121.94 | $118.50 | $120.15 | +1.50% | 870,986 |
| Apr 10, 2026 | $118.97 | $120.95 | $117.50 | $118.37 | +0.99% | 926,152 |
| Apr 9, 2026 | $120.99 | $122.53 | $116.26 | $117.21 | -2.98% | 1,318,732 |
| Apr 8, 2026 | $114.25 | $120.88 | $113.33 | $120.81 | -2.09% | 1,529,625 |
| Apr 7, 2026 | $120.52 | $124.23 | $119.44 | $123.39 | +3.23% | 1,026,058 |
| Apr 6, 2026 | $117.61 | $119.60 | $116.37 | $119.53 | +0.11% | 1,044,558 |
| Apr 2, 2026 | $116.60 | $120.00 | $114.49 | $119.40 | +2.42% | 934,032 |
| Apr 1, 2026 | $117.00 | $119.35 | $115.43 | $116.58 | -0.21% | 1,061,368 |
| Mar 31, 2026 | $116.75 | $119.69 | $114.47 | $116.82 | +0.71% | 1,229,574 |
| Mar 30, 2026 | $115.11 | $117.17 | $113.59 | $116.00 | +2.39% | 2,027,797 |
| Mar 27, 2026 | $111.80 | $114.44 | $111.80 | $113.29 | -0.15% | 1,083,889 |
| Mar 26, 2026 | $113.63 | $115.94 | $112.56 | $113.46 | -0.67% | 1,035,069 |
| Mar 25, 2026 | $114.41 | $116.19 | $113.23 | $114.22 | +0.11% | 1,119,548 |
| Mar 24, 2026 | $107.94 | $115.13 | $107.07 | $114.09 | +5.15% | 1,078,008 |
| Mar 23, 2026 | $107.79 | $111.47 | $107.00 | $108.50 | +2.24% | 1,549,760 |
| Mar 20, 2026 | $111.80 | $112.41 | $105.48 | $106.12 | -4.59% | 1,522,206 |
| Mar 19, 2026 | $110.89 | $112.67 | $109.40 | $111.23 | -1.22% | 948,700 |
| Mar 18, 2026 | $113.12 | $115.78 | $112.56 | $112.60 | +1.04% | 1,322,815 |
| Mar 17, 2026 | $111.25 | $114.97 | $110.18 | $111.44 | +0.59% | 1,213,539 |
| Mar 16, 2026 | $111.25 | $113.10 | $110.00 | $110.79 | -1.12% | 1,324,204 |
| Mar 13, 2026 | $115.00 | $116.46 | $111.50 | $112.04 | -1.91% | 1,606,816 |
| Mar 12, 2026 | $107.24 | $114.65 | $107.24 | $114.22 | +6.72% | 1,622,661 |
| Mar 11, 2026 | $104.75 | $107.68 | $103.54 | $107.03 | +1.89% | 1,051,542 |
| Mar 10, 2026 | $104.81 | $107.74 | $103.86 | $105.04 | -1.22% | 927,621 |
| Mar 9, 2026 | $102.18 | $107.45 | $100.54 | $106.34 | +3.05% | 1,215,568 |
| Mar 6, 2026 | $104.00 | $106.10 | $99.34 | $103.19 | -2.20% | 1,486,792 |
| Mar 5, 2026 | $107.50 | $112.21 | $104.84 | $105.51 | -0.58% | 1,999,633 |
| Mar 4, 2026 | $105.31 | $106.39 | $101.67 | $106.13 | +3.12% | 1,032,057 |
| Mar 3, 2026 | $103.49 | $104.86 | $99.60 | $102.92 | -3.62% | 1,569,437 |
| Mar 2, 2026 | $103.32 | $108.88 | $102.70 | $106.79 | +1.34% | 1,758,919 |
| Feb 27, 2026 | $98.20 | $106.00 | $97.90 | $105.38 | +5.02% | 1,287,594 |
| Feb 26, 2026 | $102.57 | $103.67 | $99.11 | $100.34 | -2.67% | 899,228 |
| Feb 25, 2026 | $106.36 | $106.66 | $101.56 | $103.09 | -1.04% | 1,689,360 |
| Feb 24, 2026 | $102.72 | $107.99 | $97.83 | $104.17 | +11.99% | 2,388,247 |
| Feb 23, 2026 | $93.84 | $95.23 | $91.76 | $93.02 | -1.46% | 1,303,280 |
| Feb 20, 2026 | $94.10 | $96.26 | $92.69 | $94.40 | -0.69% | 1,050,634 |
| Feb 19, 2026 | $98.54 | $100.00 | $93.10 | $95.06 | -4.49% | 1,528,666 |
| Feb 18, 2026 | $98.95 | $100.77 | $97.52 | $99.53 | +1.75% | 1,006,156 |
| Feb 17, 2026 | $99.58 | $101.30 | $96.48 | $97.82 | -2.26% | 1,385,834 |
| Feb 13, 2026 | $98.50 | $101.35 | $97.31 | $100.08 | +1.37% | 820,900 |
| Feb 12, 2026 | $100.69 | $103.00 | $96.68 | $98.73 | -1.62% | 1,183,580 |
| Feb 11, 2026 | $98.56 | $102.98 | $98.56 | $100.36 | +1.25% | 1,850,467 |
| Feb 10, 2026 | $97.03 | $100.24 | $96.34 | $99.12 | +2.74% | 1,218,654 |
| Feb 9, 2026 | $94.10 | $96.60 | $93.55 | $96.48 | +0.57% | 984,301 |
| Feb 6, 2026 | $94.09 | $96.31 | $93.18 | $95.93 | +4.08% | 1,094,709 |
| Feb 5, 2026 | $94.17 | $95.25 | $90.32 | $92.17 | -3.99% | 1,574,263 |
| Feb 4, 2026 | $93.05 | $98.06 | $93.05 | $96.00 | +5.61% | 2,645,719 |
| Feb 3, 2026 | $84.53 | $91.59 | $84.52 | $90.90 | +8.51% | 2,029,464 |
| Feb 2, 2026 | $79.89 | $84.27 | $78.61 | $83.77 | +5.61% | 1,571,912 |
| Jan 30, 2026 | $80.58 | $82.05 | $77.58 | $79.32 | -2.75% | 2,094,834 |
| Jan 29, 2026 | $82.10 | $82.69 | $78.44 | $81.56 | -0.39% | 1,370,200 |
| Jan 28, 2026 | $82.49 | $83.00 | $80.99 | $81.88 | +0.24% | 1,180,003 |
| Jan 27, 2026 | $83.52 | $84.55 | $81.65 | $81.68 | -2.95% | 1,252,107 |
| Jan 26, 2026 | $85.59 | $85.95 | $83.49 | $84.16 | -1.24% | 1,403,092 |
| Jan 23, 2026 | $86.90 | $87.39 | $85.08 | $85.22 | -1.76% | 1,279,468 |
| Jan 22, 2026 | $87.09 | $89.85 | $86.20 | $86.75 | +0.08% | 987,583 |
| Jan 21, 2026 | $84.99 | $87.97 | $84.32 | $86.68 | +3.29% | 1,826,427 |
| Jan 20, 2026 | $86.30 | $86.30 | $83.30 | $83.92 | -4.50% | 1,107,939 |
| Jan 16, 2026 | $86.63 | $88.88 | $86.63 | $87.87 | -0.49% | 904,946 |
| Jan 15, 2026 | $90.82 | $91.08 | $86.27 | $88.30 | -1.73% | 2,111,433 |
| Jan 14, 2026 | $85.63 | $90.19 | $85.07 | $89.85 | +5.71% | 1,600,484 |
| Jan 13, 2026 | $85.72 | $86.48 | $84.48 | $85.00 | +0.07% | 1,179,733 |
| Jan 12, 2026 | $83.00 | $85.13 | $82.63 | $84.94 | +2.09% | 2,078,892 |
| Jan 9, 2026 | $79.90 | $83.30 | $78.42 | $83.20 | +4.61% | 1,622,700 |
| Jan 8, 2026 | $73.86 | $81.55 | $73.50 | $79.53 | +6.79% | 1,759,316 |
| Jan 7, 2026 | $77.86 | $78.63 | $73.95 | $74.47 | -3.82% | 1,640,436 |
| Jan 6, 2026 | $74.90 | $78.34 | $74.39 | $77.43 | +3.27% | 1,358,350 |
| Jan 5, 2026 | $73.90 | $77.33 | $73.90 | $74.98 | +1.12% | 1,005,445 |
| Jan 2, 2026 | $74.57 | $75.17 | $72.69 | $74.15 | +0.28% | 919,751 |
| Dec 31, 2025 | $74.81 | $75.22 | $73.50 | $73.94 | -1.26% | 839,226 |
| Dec 30, 2025 | $74.42 | $75.45 | $74.29 | $74.88 | +0.67% | 944,983 |
| Dec 29, 2025 | $73.01 | $74.68 | $72.96 | $74.38 | +0.85% | 1,186,678 |
| Dec 26, 2025 | $73.63 | $74.01 | $73.18 | $73.75 | +0.10% | 704,445 |
| Dec 24, 2025 | $73.61 | $74.12 | $72.84 | $73.68 | +0.53% | 313,866 |
| Dec 23, 2025 | $74.04 | $74.33 | $71.87 | $73.29 | -1.48% | 1,328,051 |
| Dec 22, 2025 | $72.57 | $74.60 | $72.26 | $74.39 | +2.62% | 928,142 |
| Dec 19, 2025 | $75.44 | $75.44 | $71.79 | $72.49 | -3.06% | 1,786,703 |
| Dec 18, 2025 | $74.40 | $75.66 | $73.34 | $74.78 | +1.08% | 1,514,520 |
| Dec 17, 2025 | $73.20 | $75.44 | $73.08 | $73.98 | +0.87% | 1,921,705 |
| Dec 16, 2025 | $73.00 | $74.42 | $72.06 | $73.34 | -0.39% | 2,460,019 |
| Dec 15, 2025 | $76.02 | $76.33 | $71.27 | $73.63 | -1.03% | 3,755,898 |
| Dec 12, 2025 | $75.28 | $75.40 | $73.61 | $74.40 | -0.69% | 1,944,497 |
| Dec 11, 2025 | $72.61 | $75.09 | $72.23 | $74.92 | +3.01% | 1,960,492 |
| Dec 10, 2025 | $68.67 | $72.85 | $68.26 | $72.73 | +6.27% | 1,752,653 |
| Dec 9, 2025 | $68.69 | $71.03 | $68.42 | $68.44 | +1.21% | 1,464,185 |
| Dec 8, 2025 | $67.80 | $69.13 | $66.92 | $67.62 | -0.59% | 1,580,078 |
| Dec 5, 2025 | $68.24 | $70.34 | $67.53 | $68.02 | +0.07% | 1,488,022 |
| Dec 4, 2025 | $68.66 | $69.17 | $67.28 | $67.97 | -1.08% | 2,100,790 |
| Dec 3, 2025 | $66.70 | $70.31 | $66.45 | $68.71 | +3.17% | 1,538,510 |
| Dec 2, 2025 | $67.52 | $67.73 | $66.09 | $66.60 | -1.46% | 1,249,305 |
| Dec 1, 2025 | $65.50 | $70.06 | $65.50 | $67.59 | +1.17% | 2,362,303 |
| Nov 28, 2025 | $64.71 | $66.97 | $64.66 | $66.81 | +3.23% | 1,050,631 |
| Nov 26, 2025 | $62.84 | $65.22 | $62.78 | $64.72 | +2.94% | 1,524,243 |
| Nov 25, 2025 | $60.88 | $63.55 | $60.70 | $62.87 | +3.71% | 2,194,286 |
| Nov 24, 2025 | $58.86 | $61.04 | $58.62 | $60.62 | +2.69% | 3,632,069 |
| Nov 21, 2025 | $56.90 | $60.92 | $56.83 | $59.03 | +4.70% | 1,929,088 |
| Nov 20, 2025 | $57.88 | $59.37 | $56.33 | $56.38 | -1.95% | 1,914,968 |
| Nov 19, 2025 | $58.34 | $58.84 | $56.85 | $57.50 | -1.96% | 1,869,651 |
| Nov 18, 2025 | $59.05 | $59.68 | $57.43 | $58.65 | -0.68% | 1,410,319 |
| Nov 17, 2025 | $62.56 | $62.77 | $58.58 | $59.05 | -5.61% | 1,037,767 |
| Nov 14, 2025 | $64.26 | $64.26 | $62.39 | $62.56 | -3.62% | 858,458 |
| Nov 13, 2025 | $62.69 | $65.68 | $62.69 | $64.91 | +3.34% | 1,985,722 |
| Nov 12, 2025 | $63.45 | $64.58 | $62.30 | $62.81 | -1.01% | 1,189,170 |
| Nov 11, 2025 | $65.81 | $66.28 | $62.94 | $63.45 | -2.65% | 1,418,831 |
| Nov 10, 2025 | $65.85 | $65.85 | $64.21 | $65.18 | +0.35% | 1,203,104 |
| Nov 7, 2025 | $64.00 | $65.53 | $63.89 | $64.95 | +0.76% | 875,400 |
| Nov 6, 2025 | $65.92 | $66.30 | $64.33 | $64.46 | -2.13% | 1,114,723 |
| Nov 5, 2025 | $66.54 | $67.50 | $65.38 | $65.86 | -1.38% | 931,887 |
| Nov 4, 2025 | $67.46 | $68.19 | $66.76 | $66.78 | -2.20% | 874,025 |
| Nov 3, 2025 | $69.00 | $70.62 | $67.87 | $68.28 | -0.77% | 1,565,976 |
| Oct 31, 2025 | $67.91 | $69.52 | $67.33 | $68.81 | +0.76% | 1,949,490 |
| Oct 30, 2025 | $69.52 | $72.82 | $65.77 | $68.29 | -7.05% | 3,359,807 |
| Oct 29, 2025 | $76.64 | $76.64 | $73.12 | $73.47 | -3.89% | 1,992,741 |
| Oct 28, 2025 | $77.84 | $78.87 | $75.80 | $76.44 | -4.13% | 1,167,076 |
| Oct 27, 2025 | $79.57 | $80.04 | $79.20 | $79.73 | +0.64% | 598,746 |
| Oct 24, 2025 | $79.65 | $80.28 | $78.90 | $79.22 | +0.55% | 891,770 |
| Oct 23, 2025 | $78.13 | $79.24 | $76.60 | $78.79 | +4.57% | 1,253,144 |
| Oct 22, 2025 | $76.52 | $77.69 | $75.08 | $75.35 | -2.02% | 1,176,808 |
| Oct 21, 2025 | $75.34 | $77.04 | $74.58 | $76.90 | +2.00% | 1,086,159 |
| Oct 20, 2025 | $75.83 | $76.20 | $74.91 | $75.39 | – | 664,781 |
Seasonality
WLK return in each calendar month over the last 10 years, including dividends. The current month runs to the latest close.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average | 3.6% | 3.9% | -0.3% | 0.1% | -3.3% | -0.6% | 1.4% | 1.5% | -2.4% | -1.1% | 5.9% | 2.2% |
| Months up | 6 of 10 | 5 of 10 | 6 of 10 | 4 of 10 | 5 of 10 | 5 of 10 | 5 of 10 | 6 of 10 | 5 of 10 | 5 of 10 | 6 of 9 | 6 of 9 |
| 2026 | 7.3% | 32.9% | 11.4% | -1.3% | -24.2% | -15.9% | -3.4% | 7.2% | -17.0% | 9.6% | ||
| 2025 | -0.3% | -1.7% | -10.5% | -7.6% | -22.6% | 6.9% | 4.4% | 11.5% | -12.3% | -10.7% | -2.1% | 10.7% |
| 2024 | -1.2% | 0.6% | 10.2% | -3.6% | 9.3% | -9.8% | 2.1% | -1.3% | 3.3% | -12.2% | -2.3% | -10.7% |
| 2023 | 19.7% | -2.7% | -2.7% | -1.9% | -8.4% | 14.9% | 15.1% | -4.4% | -4.8% | -7.5% | 11.7% | 9.0% |
| 2022 | 1.6% | 12.1% | 11.9% | 2.6% | 4.6% | -25.8% | -0.7% | 1.7% | -11.9% | 11.2% | 11.8% | -4.7% |
| 2021 | -6.3% | 11.9% | 4.1% | 5.7% | 7.7% | -10.7% | -8.0% | 5.7% | 4.3% | 6.8% | -4.2% | 4.5% |
| 2020 | -12.8% | -8.3% | -31.7% | 13.8% | 10.4% | 12.5% | 1.6% | 9.4% | 6.6% | 7.0% | 11.5% | 8.6% |
| 2019 | 11.7% | -5.1% | -2.9% | 2.8% | -17.5% | 21.2% | -2.7% | -12.9% | 11.8% | -3.6% | 9.1% | 2.1% |
| 2018 | 5.7% | -3.7% | 2.7% | -3.8% | 8.4% | -7.0% | -0.4% | -11.6% | -12.1% | -14.2% | 2.0% | -8.7% |
| 2017 | 10.6% | 2.8% | 4.1% | -5.8% | -1.0% | 7.7% | 6.3% | 9.6% | 8.0% | 2.2% | 15.6% | 8.8% |