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 $425,416,201.
The total value of stock option exercises since 2005 is $35,994,071.


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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
2017-11 0 $0 65,478 $6,162,770 57,396 $1,882,466
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 ($)   Value ($)
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
2016-08-22 Jenkins Dorothy C Option Ex 960 .00 0
2016-08-22 Blakely Robert T Option Ex 960 .00 0
2016-08-22 Riley H John Jr Option Ex 960 .00 0
2016-08-22 Lukens Max L Option Ex 960 .00 0
2016-02-15 Mattina Michael J. (Sr. VP, Polyethylene) Option Ex 892 .00 0
2016-02-15 Teel Lawrence E. (SVP, Olefins) Option Ex 774 .00 0
2016-02-15 Buesinger Robert F. (Sr. Vice President, Vinyls) Option Ex 2,114 .00 0
2016-02-15 Bender Mark Steven (Sr VP, CFO and Treasurer) Option Ex 4,040 .00 0
2016-02-15 Mangieri George J (VP & Chief Accounting Officer) Option Ex 1,362 .00 0
2015-11-10 Mangieri George J (VP & Chief Accounting Officer) Sale 2,785 60.20 167,659
2015-11-10 Mangieri George J (VP & Chief Accounting Officer) Option Ex 1,974 30.05 59,324
2015-09-30 Ederington L. Benjamin (VP, General Counsel, Corp Secy) Option Ex 1,914 .00 0
2015-08-23 Graff Michael J Option Ex 586 .00 0
2015-08-23 Northcutt R Bruce Option Ex 586 .00 0
2015-08-23 Jenkins Dorothy C Option Ex 586 .00 0
2015-08-23 Blakely Robert T Option Ex 586 .00 0
2015-08-23 Riley H John Jr Option Ex 586 .00 0
2015-08-23 Lukens Max L Option Ex 586 .00 0
2015-08-22 Graff Michael J Option Ex 357 .00 0
2015-08-22 Northcutt R Bruce Option Ex 357 .00 0
2015-08-22 Jenkins Dorothy C Option Ex 357 .00 0
2015-08-22 Blakely Robert T Option Ex 357 .00 0
2015-08-22 Riley H John Jr Option Ex 357 .00 0
2015-08-22 Lukens Max L Option Ex 357 .00 0
2015-08-11 Blakely Robert T Sale 5,143 63.00 324,009
2015-08-11 Blakely Robert T Option Ex 1,776 12.26 21,764
2015-05-26 Taylor Jeffrey L (Sr VP, Polyethylene) Sale 8,143 70.54 574,423
2015-05-26 Taylor Jeffrey L (Sr VP, Polyethylene) Option Ex 6,846 46.58 318,859
2015-05-11 Teel Lawrence E. (SVP, Olefins) Sale 2,125 70.24 149,266
2015-05-11 Teel Lawrence E. (SVP, Olefins) Option Ex 1,584 37.88 59,994
2015-05-06 Kenner Andrew (VP - Manufacturing) Sale 10,779 72.29 779,246
2015-05-06 Kenner Andrew (VP - Manufacturing) Option Ex 8,618 26.48 228,239
2014-08-25 Chao James Sale 30,559 95.00 2,903,196
2014-08-25 Chao James Option Ex 30,559 22.91 700,259
2014-08-23 Graff Michael J Option Ex 586 .00 0
2014-08-23 Northcutt R Bruce Option Ex 586 .00 0
2014-08-23 Jenkins Dorothy C Option Ex 586 .00 0
2014-08-23 Blakely Robert T Option Ex 586 .00 0
2014-08-23 Riley H John Jr Option Ex 586 .00 0
2014-08-23 Lukens Max L Option Ex 586 .00 0
2014-08-22 Chao James Sale 42,379 93.57 3,965,572
2014-08-22 Chao James Option Ex 42,379 16.59 703,025
2014-06-09 Chao James (Chairman) Sale 42,946 82.01 3,522,044
2014-06-09 Chao James (Chairman) Option Ex 42,946 37.88 1,626,579
2014-06-03 Jenkins Dorothy C Option Ex 5,518 7.25 40,005
2014-05-07 Buesinger Robert F. (Sr. Vice President, Vinyls) Sale 1,872 77.36 144,819
2014-05-07 Buesinger Robert F. (Sr. Vice President, Vinyls) Option Ex 1,872 45.70 85,546
2014-03-13 Blakely Robert T Sale 1,609 135.03 217,263
2014-03-03 Bender Mark Steven (Sr VP, CFO and Treasurer) Sale 17,721 133.60 2,367,525
2014-03-03 Bender Mark Steven (Sr VP, CFO and Treasurer) Option Ex 17,721 31.61 560,160
2014-02-28 Teel Lawrence E. (Vice President, Olefins) Sale 1,107 134.71 149,118
2014-02-28 Teel Lawrence E. (Vice President, Olefins) Option Ex 1,014 65.78 66,697
2014-02-28 Hansen David R (Sr VP Adminstration) Sale 4,232 134.50 569,187
2014-02-28 Hansen David R (Sr VP Adminstration) Option Ex 4,232 75.75 320,574
2014-02-28 Riley H John Jr Sale 7,375 134.71 993,449
2014-02-28 Riley H John Jr Option Ex 7,375 22.67 167,176
2014-02-27 Taylor Jeffrey L (Sr VP, Polyethylene) Sale 4,314 132.62 572,114
2014-02-27 Taylor Jeffrey L (Sr VP, Polyethylene) Option Ex 3,856 65.78 253,636
2014-02-26 Buesinger Robert F. (Sr. Vice President, Vinyls) Sale 2,361 132.95 313,904
2014-02-26 Buesinger Robert F. (Sr. Vice President, Vinyls) Option Ex 2,361 52.97 125,057
2014-02-26 Mangieri George J (VP & Chief Accounting Officer) Sale 354 133.01 47,085
2014-02-24 Mangieri George J (VP & Chief Accounting Officer) Sale 2,985 132.27 394,834
2014-02-24 Mangieri George J (VP & Chief Accounting Officer) Option Ex 2,985 52.97 158,109
2013-11-25 Blakely Robert T Sale 2,534 112.21 284,342
2013-11-11 Lukens Max L Sale 888 113.38 100,682
2013-11-11 Lukens Max L Option Ex 888 24.51 21,764
2013-08-08 Bender Mark Steven (Sr VP, CFO and Treasurer) Sale 3,000 101.00 303,000
2013-08-01 Wallace Stephen (VP, General Counsel, Secretary) Sale 12,786 105.72 1,351,671
2013-08-01 Wallace Stephen (VP, General Counsel, Secretary) Option Ex 12,786 42.15 538,968
2013-08-01 Mangieri George J (VP & Chief Accounting Officer) Sale 2,025 104.67 211,956
2013-08-01 Mangieri George J (VP & Chief Accounting Officer) Option Ex 2,025 45.83 92,805
2013-08-01 Lukens Max L (VP, General Counsel, Secretary) Sale 12,786 105.72 1,351,671
2013-08-01 Lukens Max L (VP, General Counsel, Secretary) Option Ex 12,786 42.15 538,968
2013-05-28 Kenner Andrew (VP - Manufacturing) Sale 9,607 94.13 904,287
2013-05-28 Kenner Andrew (VP - Manufacturing) Option Ex 5,679 42.15 239,386
2013-05-21 Wallace Stephen (VP, General Counsel, Secretary) Sale 9,092 94.02 854,802
2013-05-21 Wallace Stephen (VP, General Counsel, Secretary) Option Ex 9,092 19.29 175,384
2013-05-21 Mangieri George J (VP & Chief Accounting Officer) Sale 1,001 94.50 94,594
2013-05-08 Buesinger Robert F. (Sr. Vice President, Vinyls) Sale 1,478 90.97 134,455
2013-05-08 Buesinger Robert F. (Sr. Vice President, Vinyls) Option Ex 1,478 27.23 40,253
2013-05-08 Wallace Stephen (VP, General Counsel, Secretary) Sale 13,857 89.80 1,244,358
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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.