Insider Trading activities of Westlake Chemical Corp insiders.

Monthly summaries of insider trading activities (stock purchases, sales, and option exercises) reported by insiders of Westlake Chemical Corp since 2005 are illustrated in Table 1 and Table 2. Table 1 shows the monthly insider trading data of Westlake Chemical Corp since year 2005. Table 2 shows the detailed insider transactions of Westlake Chemical Corp since 2005. The reporting company's ticker symbol is WLK. The reporting company's CIK number is 1262823.
The total value of stock buying since 2005 is $621,540.
The total value of stock sales since 2005 is $477,056,688.
The total value of stock option exercises since 2005 is $48,176,881.


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Table 1. Monthly summaries of insider stock purchases, sales, and option exercises for Westlake Chemical Corp (WLK).
Trading Period Insider Buying Insider Sales Option Exercises
year-month Shares Value Shares Value Shares Value
2018-11 0 $0 113,639 $8,226,757 155,892 $1,109,948
2018-08 0 $0 0 $0 19,962 $0
2018-05 0 $0 70,376 $8,437,857 43,224 $1,523,785
2018-03 0 $0 51,856 $5,845,172 43,045 $2,452,034
2018-02 0 $0 55,224 $6,145,615 56,921 $1,253,905
2017-12 0 $0 9,174 $899,290 6,500 $148,947
2017-11 0 $0 298,839 $28,248,566 270,375 $7,576,657
2017-09 0 $0 0 $0 6,700 $0
2017-08 0 $0 13,794 $968,614 19,630 $52,081
2017-05 0 $0 6,578 $409,197 0 $0
2017-03 0 $0 20,193 $1,314,566 8,193 $369,168
2017-02 0 $0 42,180 $2,672,145 74,860 $666,654
2016-11 0 $0 101,154 $5,430,433 21,154 $644,237
2016-09 0 $0 0 $0 4,786 $0
2016-08 0 $0 30,714 $1,597,158 70,716 $970,868
2016-02 0 $0 0 $0 9,182 $0
2015-11 0 $0 2,785 $167,659 1,974 $59,324
2015-09 0 $0 0 $0 1,914 $0
2015-08 0 $0 5,143 $324,009 7,434 $21,764
2015-05 0 $0 21,047 $1,502,935 17,048 $607,092
2014-08 0 $0 72,938 $6,868,768 76,454 $1,403,284
2014-06 0 $0 42,946 $3,522,044 48,464 $1,666,584
2014-05 0 $0 1,872 $144,819 1,872 $85,546
2014-03 0 $0 19,330 $2,584,788 17,721 $560,160
2014-02 0 $0 22,728 $3,039,691 21,823 $1,091,249
2013-11 0 $0 3,422 $385,024 888 $21,764
2013-08 0 $0 30,597 $3,218,298 27,597 $1,170,741
2013-05 0 $0 35,035 $3,232,496 30,106 $872,769
2013-03 0 $0 40,791 $3,872,656 31,474 $1,060,906
2012-12 0 $0 88,868 $6,567,611 44,915 $888,466
2012-11 0 $0 83,287 $6,270,018 146,714 $3,381,579
2012-08 0 $0 119,338 $8,719,400 90,314 $10,216,781
2012-05 0 $0 194,028 $10,988,237 142,426 $2,362,833
2011-11 0 $0 1,295 $56,604 1,295 $18,434
2011-08 1,000 $37,190 0 $0 0 $0
2011-05 0 $0 14,496 $868,921 21,985 $457,042
2011-03 0 $0 94,450 $4,660,419 91,491 $1,753,137
2011-02 0 $0 63,237 $2,963,418 41,530 $1,008,979
2010-11 0 $0 51,428 $1,902,031 50,596 $1,316,274
2010-08 0 $0 12,017 $339,415 9,694 $154,508
2010-05 0 $0 7,489 $451,212 0 $0
2010-03 0 $0 12,454 $283,389 11,473 $177,077
2009-11 0 $0 4,484 $117,346 3,267 $63,020
2009-08 0 $0 22,293 $543,218 19,323 $298,489
2008-09 0 $0 6,672 $150,280 4,834 $70,093
2007-08 0 $0 4,939 $137,180 6,134 $88,943
2006-11 0 $0 6,836 $222,058 5,882 $98,212
2006-08 0 $0 25,067 $736,551 25,067 $363,469
2006-05 0 $0 11,000,000 $331,716,000 0 $0
2006-01 0 $0 9,700 $300,700 4,833 $70,078
2005-01 0 $0 133 $4,123 0 $0
2004-08 40,300 $584,350 0 $0 0 $0

Table 2. Detailed insider stock purchases, sales, and option exercises of Westlake Chemical Corp insiders (WLK)
  Trade Date   Insider Name Trade Type     Shares       Price ($)   Value ($)
2018-11-16 Chao Albert (President & CEO) Sale 24,509 71.85 1,761,069
2018-11-16 Chao Albert (President & CEO) Option Ex 30,640 7.12 218,156
2018-11-15 Chao Albert (President & CEO) Sale 24,509 71.30 1,747,418
2018-11-15 Chao Albert (President & CEO) Option Ex 30,640 7.12 218,156
2018-11-14 Chao Albert (President & CEO) Sale 24,621 71.73 1,766,015
2018-11-14 Chao Albert (President & CEO) Option Ex 30,639 7.12 218,149
2018-11-13 Chao Albert (President & CEO) Sale 15,000 72.32 1,084,755
2018-11-13 Chao Albert (President & CEO) Option Ex 25,000 7.12 178,000
2018-11-12 Chao Albert (President & CEO) Sale 25,000 74.70 1,867,500
2018-11-12 Chao Albert (President & CEO) Option Ex 38,973 7.12 277,487
2018-08-21 Graff Michael J Option Ex 603 .00 0
2018-08-21 Northcutt R Bruce Option Ex 603 .00 0
2018-08-21 Jenkins Dorothy C Option Ex 603 .00 0
2018-08-21 Blakely Robert T Option Ex 603 .00 0
2018-08-21 Riley H John Jr Option Ex 603 .00 0
2018-08-21 Lukens Max L Option Ex 603 .00 0
2018-08-18 Graff Michael J Option Ex 1,721 .00 0
2018-08-18 Northcutt R Bruce Option Ex 1,721 .00 0
2018-08-18 Jenkins Dorothy C Option Ex 1,721 .00 0
2018-08-18 Blakely Robert T Option Ex 1,721 .00 0
2018-08-18 Riley H John Jr Option Ex 1,721 .00 0
2018-08-18 Lukens Max L Option Ex 1,721 .00 0
2018-08-17 Graff Michael J Option Ex 1,003 .00 0
2018-08-17 Northcutt R Bruce Option Ex 1,003 .00 0
2018-08-17 Jenkins Dorothy C Option Ex 1,003 .00 0
2018-08-17 Blakely Robert T Option Ex 1,003 .00 0
2018-08-17 Riley H John Jr Option Ex 1,003 .00 0
2018-08-17 Lukens Max L Option Ex 1,003 .00 0
2018-05-24 Chao James (Chairman) Sale 33,305 120.69 4,019,580
2018-05-21 Bender Mark Steven (EVP and CFO) Sale 12,066 122.84 1,482,223
2018-05-21 Bender Mark Steven (EVP and CFO) Option Ex 12,066 68.09 821,573
2018-05-15 Buesinger Robert F. (EVP, Vinyl Products) Sale 1,447 118.88 172,012
2018-05-11 Bender Mark Steven (EVP and CFO) Sale 23,506 117.33 2,757,958
2018-05-11 Bender Mark Steven (EVP and CFO) Option Ex 23,506 26.48 622,532
2018-05-10 Jenkins Dorothy C Sale 52 117.01 6,084
2018-05-10 Jenkins Dorothy C Option Ex 7,652 10.41 79,680
2018-03-09 Kenner Andrew (SVP - Chemical Manufacturing) Sale 6,028 120.00 723,360
2018-03-09 Kenner Andrew (SVP - Chemical Manufacturing) Option Ex 3,412 61.87 211,083
2018-03-05 Buesinger Robert F. (EVP, Vinyl Products) Sale 19,349 113.03 2,186,920
2018-03-05 Buesinger Robert F. (EVP, Vinyl Products) Option Ex 15,315 58.12 890,184
2018-03-05 Kenner Andrew (SVP - Chemical Manufacturing) Sale 24,318 110.61 2,689,813
2018-03-05 Kenner Andrew (SVP - Chemical Manufacturing) Option Ex 24,318 55.55 1,350,767
2018-03-05 Mangieri George J (SVP & Chief Accounting Officer) Sale 2,161 113.41 245,079
2018-02-28 Mangieri George J (SVP & Chief Accounting Officer) Sale 4,335 111.22 482,138
2018-02-28 Mangieri George J (SVP & Chief Accounting Officer) Option Ex 4,335 58.12 251,971
2018-02-27 Blakely Robert T Sale 4,038 111.00 448,218
2018-02-26 Teel Lawrence E. (EVP, Olefins) Sale 9,351 111.86 1,046,002
2018-02-26 Teel Lawrence E. (EVP, Olefins) Option Ex 9,351 58.12 543,526
2018-02-26 Bender Mark Steven (EVP and CFO) Sale 5,000 111.45 557,250
2018-02-22 Ederington L. Benjamin (SVP, GC, CAO and Secretary) Sale 6,942 111.45 773,665
2018-02-22 Ederington L. Benjamin (SVP, GC, CAO and Secretary) Option Ex 6,942 66.03 458,408
2018-02-22 Bender Mark Steven (EVP and CFO) Sale 6,000 110.80 665,150
2018-02-22 Lukens Max L Sale 17,558 111.17 1,951,922
2018-02-20 Ederington L. Benjamin (SVP, GC, CAO and Secretary) Option Ex 1,762 .00 0
2018-02-20 Teel Lawrence E. (EVP, Olefins) Option Ex 1,762 .00 0
2018-02-20 Buesinger Robert F. (EVP, Vinyl Products) Option Ex 1,982 .00 0
2018-02-20 Kenner Andrew (SVP - Chemical Manufacturing) Option Ex 1,802 .00 0
2018-02-20 Bender Mark Steven (EVP and CFO) Option Ex 3,619 .00 0
2018-02-20 Chao James (Chairman) Option Ex 10,868 .00 0
2018-02-20 Chao Albert (President & CEO) Option Ex 13,585 .00 0
2018-02-20 Mangieri George J (SVP & Chief Accounting Officer) Option Ex 913 .00 0
2017-12-04 Bender Mark Steven (EVP and CFO) Sale 6,500 97.83 635,901
2017-12-04 Bender Mark Steven (EVP and CFO) Option Ex 6,500 22.91 148,947
2017-12-01 Buesinger Robert F. (EVP, Vinyls Products) Sale 2,674 98.50 263,389
2017-11-29 Chao Albert (President & CEO) Sale 16,844 95.25 1,604,340
2017-11-29 Chao Albert (President & CEO) Option Ex 16,844 9.64 162,460
2017-11-28 Chao Albert (President & CEO) Sale 25,000 94.70 2,367,575
2017-11-28 Chao Albert (President & CEO) Option Ex 25,000 9.64 241,125
2017-11-27 Chao Albert (President & CEO) Sale 25,000 94.08 2,352,125
2017-11-27 Chao Albert (President & CEO) Option Ex 25,000 9.64 241,125
2017-11-24 Chao James (Chairman) Sale 66,026 94.61 6,246,785
2017-11-24 Chao James (Chairman) Option Ex 66,026 59.26 3,912,370
2017-11-24 Chao Albert (President & CEO) Sale 20,000 94.58 1,891,680
2017-11-24 Chao Albert (President & CEO) Option Ex 20,000 9.64 192,900
2017-11-22 Chao James (Chairman) Sale 10,109 95.20 962,407
2017-11-22 Chao James (Chairman) Option Ex 10,109 45.70 461,961
2017-11-22 Chao Albert (President & CEO) Sale 25,000 95.25 2,381,200
2017-11-22 Chao Albert (President & CEO) Option Ex 25,000 9.64 241,125
2017-11-21 Bender Mark Steven (EVP and CFO) Sale 20,382 94.27 1,921,309
2017-11-21 Chao Albert (President & CEO) Sale 25,000 94.33 2,358,375
2017-11-21 Chao Albert (President & CEO) Option Ex 25,000 9.64 241,125
2017-11-17 Buesinger Robert F. (EVP, Vinyls Products) Sale 5,214 93.82 489,198
2017-11-17 Buesinger Robert F. (EVP, Vinyls Products) Option Ex 5,214 63.98 333,581
2017-11-14 Blakely Robert T Sale 4,367 92.33 403,192
2017-11-13 Teel Lawrence E. (EVP, Olefins) Sale 12,712 93.99 1,194,775
2017-11-13 Teel Lawrence E. (EVP, Olefins) Option Ex 11,912 55.55 661,663
2017-11-13 Bender Mark Steven (EVP and CFO) Sale 29,804 94.30 2,810,606
2017-11-13 Bender Mark Steven (EVP and CFO) Option Ex 29,804 10.26 305,878
2017-11-13 Mangieri George J (SVP & Chief Accounting Officer) Sale 13,381 94.54 1,264,999
2017-11-13 Mangieri George J (SVP & Chief Accounting Officer) Option Ex 10,466 55.55 581,344
2017-09-30 Ederington L. Benjamin (SVP, GC, CAO and Secretary) Option Ex 6,700 .00 0
2017-08-22 Graff Michael J Option Ex 357 .00 0
2017-08-22 Northcutt R Bruce Option Ex 357 .00 0
2017-08-22 Jenkins Dorothy C Option Ex 357 .00 0
2017-08-22 Blakely Robert T Option Ex 357 .00 0
2017-08-22 Riley H John Jr Option Ex 357 .00 0
2017-08-22 Lukens Max L Option Ex 357 .00 0
2017-08-21 Graff Michael J Option Ex 603 .00 0
2017-08-21 Northcutt R Bruce Option Ex 603 .00 0
2017-08-21 Jenkins Dorothy C Option Ex 603 .00 0
2017-08-21 Blakely Robert T Option Ex 603 .00 0
2017-08-21 Riley H John Jr Option Ex 603 .00 0
2017-08-21 Lukens Max L Option Ex 603 .00 0
2017-08-17 Graff Michael J Option Ex 1,003 .00 0
2017-08-17 Northcutt R Bruce Option Ex 1,003 .00 0
2017-08-17 Jenkins Dorothy C Option Ex 3,009 .00 0
2017-08-17 Blakely Robert T Option Ex 1,003 .00 0
2017-08-17 Riley H John Jr Option Ex 1,003 .00 0
2017-08-17 Lukens Max L Option Ex 1,003 .00 0
2017-08-15 Bender Mark Steven (Executive VP & CFO) Sale 13,794 70.22 968,614
2017-08-14 Jenkins Dorothy C Option Ex 3,840 13.56 52,081
2017-05-17 Mangieri George J (VP & Chief Accounting Officer) Sale 6,578 62.21 409,197
2017-03-10 Bender Mark Steven (Sr VP, CFO and Treasurer) Sale 12,000 64.31 771,780
2017-03-01 Buesinger Robert F. (Sr. Vice President, Vinyls) Sale 8,193 66.25 542,786
2017-03-01 Buesinger Robert F. (Sr. Vice President, Vinyls) Option Ex 8,193 45.06 369,168
2017-02-23 Chao Albert (President & CEO) Sale 42,180 63.35 2,672,145
2017-02-23 Chao Albert (President & CEO) Option Ex 42,180 15.80 666,654
2017-02-14 Mattina Michael J. (Sr. VP, Polyethylene) Option Ex 660 .00 0
2017-02-14 Ederington L. Benjamin (VP, General Counsel, Corp Secy) Option Ex 342 .00 0
2017-02-14 Teel Lawrence E. (SVP, Olefins) Option Ex 1,094 .00 0
2017-02-14 Buesinger Robert F. (Sr. Vice President, Vinyls) Option Ex 1,674 .00 0
2017-02-14 Kenner Andrew (VP - Manufacturing) Option Ex 1,674 .00 0
2017-02-14 Bender Mark Steven (Sr VP, CFO and Treasurer) Option Ex 3,152 .00 0
2017-02-14 Chao James (Chairman) Option Ex 10,274 .00 0
2017-02-14 Chao Albert (President & CEO) Option Ex 12,838 .00 0
2017-02-14 Mangieri George J (VP & Chief Accounting Officer) Option Ex 972 .00 0
2016-11-17 Chao James (Chairman) Sale 10,000 54.20 541,970
2016-11-17 Chao Albert (President & CEO) Sale 10,000 54.20 541,970
2016-11-16 Chao James (Chairman) Sale 10,000 54.45 544,450
2016-11-16 Chao Albert (President & CEO) Sale 10,000 54.45 544,450
2016-11-15 Mattina Michael J. (Sr. VP, Polyethylene) Sale 18,274 53.78 982,775
2016-11-15 Mattina Michael J. (Sr. VP, Polyethylene) Option Ex 18,274 30.52 557,685
2016-11-15 Chao James (Chairman) Sale 10,000 53.06 530,600
2016-11-15 Chao Albert (President & CEO) Sale 10,000 53.06 530,600
2016-11-14 Chao James (Chairman) Sale 10,000 52.84 528,440
2016-11-14 Chao Albert (President & CEO) Sale 10,000 52.84 528,440
2016-11-10 Buesinger Robert F. (Sr. Vice President, Vinyls) Sale 2,880 54.42 156,738
2016-11-10 Buesinger Robert F. (Sr. Vice President, Vinyls) Option Ex 2,880 30.05 86,552
2016-09-30 Ederington L. Benjamin (VP, General Counsel, Corp Secy) Option Ex 4,786 .00 0
2016-08-23 Graff Michael J Option Ex 588 .00 0
2016-08-23 Bender Mark Steven (Sr VP, CFO and Treasurer) Option Ex 30,714 15.80 485,434
2016-08-23 Northcutt R Bruce Option Ex 588 .00 0
2016-08-23 Jenkins Dorothy C Option Ex 588 .00 0
2016-08-23 Mangieri George J (VP & Chief Accounting Officer) Sale 30,714 52.00 1,597,158
2016-08-23 Mangieri George J (VP & Chief Accounting Officer) Option Ex 30,714 15.80 485,434
2016-08-23 Blakely Robert T Option Ex 588 .00 0
2016-08-23 Riley H John Jr Option Ex 588 .00 0
2016-08-23 Lukens Max L Option Ex 588 .00 0
2016-08-22 Graff Michael J Option Ex 960 .00 0
2016-08-22 Northcutt R Bruce Option Ex 960 .00 0
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Insider trading activities including stock purchases, stock sales, and option exercises of WLK listed in the above tables cannot be completely guaranteed as to their accuracy. For more insider trading information of Westlake Chemical Corp (symbol WLK, CIK number 1262823) see the Securities and Exchange Commission (SEC) website.