Last 12 months
Inside the activity.
0 purchase rows · 9 sale rows
Disclosed non-derivative P/S rows, by transaction month. Includes amendments and private transactions.Monthly counts
| Month | Purchases | Sales |
|---|---|---|
| Nov 2025 | 0 | 0 |
| Dec 2025 | 0 | 3 |
| Jan 2026 | 0 | 0 |
| Feb 2026 | 0 | 2 |
| Mar 2026 | 0 | 2 |
| Apr 2026 | 0 | 0 |
| May 2026 | 0 | 0 |
| Jun 2026 | 0 | 0 |
| Jul 2026 | 0 | 0 |
| Aug 2026 | 0 | 2 |
| Sep 2026 | 0 | 0 |
| Oct 2026 | 0 | 0 |
Latest available
Insider transactions
Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”
The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.
| Transaction date | Owner / reported role | Activity / security | Shares / units | Reported price | Reported value | Details |
|---|---|---|---|---|---|---|
| December 04, 2017 Filed Dec 5, 2017 18:08 UTC |
Bender Mark StevenEVP and CFO
|
Exercise / conversionEmployee Option (right to buy) · Derivative | 6,500 | $0.00 Strike: $22.92 | $0.00 |
DisclosureSEC source: 0001140361-17-045021 · doc1.xml · derivative · entry 3 Bender Mark Steven · CIK 0001330417 · EVP and CFO 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 6,680 Underlying: Common Stock · 6,500 shares Expires 2021-02-18 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F2 · derivative.exercise_date: The stock options are excercisable in three installments of 33%, 33% and 34% on February 18, 2012, 2013 and 2014. Read SEC document |
| December 04, 2017 Filed Dec 5, 2017 18:08 UTC |
Bender Mark StevenEVP and CFO
|
SaleCommon Stock | 6,500 | $97.83 | $635,901.50 |
DisclosureSEC source: 0001140361-17-045021 · doc1.xml · nonDerivative · entry 2 Bender Mark Steven · CIK 0001330417 · EVP and CFO 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 24,067 F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $97.35 to $98.17, inclusive. The reporting person undertakes to provide to Westlake Chemical Corp., any security holder of Westlake Chemical Corp. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. Read SEC document |
| December 04, 2017 Filed Dec 5, 2017 18:08 UTC |
Bender Mark StevenEVP and CFO
|
Exercise / conversionCommon Stock | 6,500 | $22.92 | $148,947.50 |
DisclosureSEC source: 0001140361-17-045021 · doc1.xml · nonDerivative · entry 1 Bender Mark Steven · CIK 0001330417 · EVP and CFO 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 30,567 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| December 04, 2017 Filed Dec 6, 2017 08:27 UTC |
Chao JamesDirector · Chairman · 10% owner
|
GiftCommon Stock | 15,000 | $0.00 | $0.00 |
DisclosureSEC source: 0001140361-17-045140 · doc1.xml · nonDerivative · entry 1 Chao James · CIK 0001299505 · Director · Chairman · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 93,969 Read SEC document |
| December 01, 2017 Filed Dec 4, 2017 09:58 UTC |
Buesinger Robert F.EVP, Vinyls Products
|
SaleCommon Stock | 2,674 | $98.50 | $263,389.00 |
DisclosureSEC source: 0001140361-17-044706 · doc1.xml · nonDerivative · entry 1 Buesinger Robert F. · CIK 0001488587 · EVP, Vinyls Products 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 6,635 Read SEC document |
| December 01, 2017 Filed Dec 4, 2017 15:43 UTC Amendment |
Chao JamesDirector · Chairman · 10% owner
|
GiftCommon Stock | 10,000 | $0.00 | $0.00 |
DisclosureSEC source: 0001140361-17-044820 · doc1.xml · nonDerivative · entry 1 Chao James · CIK 0001299505 · Director · Chairman · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 108,969 Read SEC document |
| November 29, 2017 Filed Nov 29, 2017 14:56 UTC |
Chao JamesDirector · Chairman · 10% owner
|
GiftCommon Stock | 10,000 | $0.00 | $0.00 |
DisclosureSEC source: 0001140361-17-044135 · doc1.xml · nonDerivative · entry 1 Chao James · CIK 0001299505 · Director · Chairman · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 108,969 Read SEC document |
| November 29, 2017 Filed Nov 30, 2017 17:49 UTC |
Chao AlbertDirector · President & CEO · 10% owner
|
Exercise / conversionEmployee Option (right to buy) · Derivative | 16,844 | $0.00 Strike: $9.65 | $0.00 |
DisclosureSEC source: 0001140361-17-044361 · doc1.xml · derivative · entry 8 Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 0 Underlying: Common Stock · 16,844 shares Expires 2018-02-15 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F4 · derivative.exercise_date: The stock options are excercisable in three equal installments on February 15, 2009, 2010 and 2011. Read SEC document |
| November 29, 2017 Filed Nov 30, 2017 17:49 UTC |
Chao AlbertDirector · President & CEO · 10% owner
|
SaleCommon Stock | 16,844 | $95.25 | $1,604,340.47 |
DisclosureSEC source: 0001140361-17-044361 · doc1.xml · nonDerivative · entry 5 Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 274,018 F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $95.00 to $95.77, inclusive. The reporting person undertakes to provide to Westlake Chemical Corp., any security holder of Westlake Chemical Corp. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. Read SEC document |
| November 29, 2017 Filed Nov 30, 2017 17:49 UTC |
Chao AlbertDirector · President & CEO · 10% owner
|
Exercise / conversionCommon Stock | 16,844 | $9.65 | $162,460.38 |
DisclosureSEC source: 0001140361-17-044361 · doc1.xml · nonDerivative · entry 4 Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 290,862 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| November 28, 2017 Filed Nov 30, 2017 17:49 UTC |
Chao AlbertDirector · President & CEO · 10% owner
|
Exercise / conversionEmployee Option (right to buy) · Derivative | 25,000 | $0.00 Strike: $9.65 | $0.00 |
DisclosureSEC source: 0001140361-17-044361 · doc1.xml · derivative · entry 7 Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 16,844 Underlying: Common Stock · 25,000 shares Expires 2018-02-15 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F4 · derivative.exercise_date: The stock options are excercisable in three equal installments on February 15, 2009, 2010 and 2011. Read SEC document |
| November 28, 2017 Filed Nov 30, 2017 17:49 UTC |
Chao AlbertDirector · President & CEO · 10% owner
|
SaleCommon Stock | 1,010 | $94.85 | $95,802.54 |
DisclosureSEC source: 0001140361-17-044361 · doc1.xml · nonDerivative · entry 3 Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 274,018 F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $94.8001 to $94.89, inclusive. The reporting person undertakes to provide to Westlake Chemical Corp., any security holder of Westlake Chemical Corp. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. Read SEC document |
| November 28, 2017 Filed Nov 30, 2017 17:49 UTC |
Chao AlbertDirector · President & CEO · 10% owner
|
SaleCommon Stock | 23,990 | $94.55 | $2,268,278.49 |
DisclosureSEC source: 0001140361-17-044361 · doc1.xml · nonDerivative · entry 2 Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 275,028 F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $93.80 to $94.80, inclusive. The reporting person undertakes to provide to Westlake Chemical Corp., any security holder of Westlake Chemical Corp. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. Read SEC document |
| November 28, 2017 Filed Nov 30, 2017 17:49 UTC |
Chao AlbertDirector · President & CEO · 10% owner
|
Exercise / conversionCommon Stock | 25,000 | $9.65 | $241,125.00 |
DisclosureSEC source: 0001140361-17-044361 · doc1.xml · nonDerivative · entry 1 Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 299,018 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| November 27, 2017 Filed Nov 28, 2017 15:53 UTC |
Chao AlbertDirector · President & CEO · 10% owner
|
Exercise / conversionEmployee Option (right to buy) · Derivative | 25,000 | $0.00 Strike: $9.65 | $0.00 |
DisclosureSEC source: 0001140361-17-043937 · doc1.xml · derivative · entry 5 Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 41,844 Underlying: Common Stock · 25,000 shares Expires 2018-02-15 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F3 · derivative.exercise_date: The stock options are excercisable in three equal installments on February 15, 2009, 2010 and 2011. Read SEC document |
| November 27, 2017 Filed Nov 28, 2017 15:53 UTC |
Chao AlbertDirector · President & CEO · 10% owner
|
SaleCommon Stock | 2,966 | $94.25 | $279,533.64 |
DisclosureSEC source: 0001140361-17-043937 · doc1.xml · nonDerivative · entry 3 Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 274,018 F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $94.22 to $94.33, inclusive. The reporting person undertakes to provide to Westlake Chemical Corp., any security holder of Westlake Chemical Corp. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. Read SEC document |
| November 27, 2017 Filed Nov 28, 2017 15:53 UTC |
Chao AlbertDirector · President & CEO · 10% owner
|
SaleCommon Stock | 22,034 | $93.92 | $2,069,521.42 |
DisclosureSEC source: 0001140361-17-043937 · doc1.xml · nonDerivative · entry 2 Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 276,984 F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $93.215 to $94.215, inclusive. The reporting person undertakes to provide to Westlake Chemical Corp., any security holder of Westlake Chemical Corp. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. Read SEC document |
| November 27, 2017 Filed Nov 28, 2017 15:53 UTC |
Chao AlbertDirector · President & CEO · 10% owner
|
Exercise / conversionCommon Stock | 25,000 | $9.65 | $241,125.00 |
DisclosureSEC source: 0001140361-17-043937 · doc1.xml · nonDerivative · entry 1 Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 299,018 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| November 26, 2017 Filed Dec 19, 2017 20:21 UTC Amendment |
Bender Mark StevenEVP and CFO
|
Exercise / conversionEmployee Option (right to buy) · Derivative | 4,407 | $0.00 Strike: $14.24 | $0.00 |
DisclosureSEC source: 0001140361-17-046709 · doc1.xml · derivative · entry 3 Bender Mark Steven · CIK 0001330417 · EVP and CFO 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 0 Underlying: Common Stock · 4,407 shares Expires 2019-02-13 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F2 · derivative.exercise_price: The price of the security reflected on November 26, 2012 pre-dates the two-for-one stock split which occurred March 18, 2014. F1 · shares: The amount of the security reflected on November 26, 2012 pre-dates the two-for-one stock split which occurred March 18, 2014. F3 · derivative.exercise_date: The stock options are excercisable in three installments of 33%, 33% and 34% on February 13, 2010, 2011 and 2013. F1 · derivative.underlying_shares: The amount of the security reflected on November 26, 2012 pre-dates the two-for-one stock split which occurred March 18, 2014. Read SEC document |
| November 24, 2017 Filed Nov 27, 2017 12:33 UTC |
Chao JamesDirector · Chairman · 10% owner
|
Exercise / conversionEmployee Option (right to buy) · Derivative | 32,000 | $0.00 Strike: $63.98 | $0.00 |
DisclosureSEC source: 0001140361-17-043827 · doc1.xml · derivative · entry 11 Chao James · CIK 0001299505 · Director · Chairman · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 0 Underlying: Common Stock · 32,000 shares Expires 2024-02-14 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F5 · derivative.exercise_date: The stock options are excercisable in three equal installments on February 14, 2015, 2016 and 2017. Read SEC document |
| November 24, 2017 Filed Nov 27, 2017 12:33 UTC |
Chao JamesDirector · Chairman · 10% owner
|
Exercise / conversionEmployee Option (right to buy) · Derivative | 23,917 | $0.00 Strike: $68.09 | $0.00 |
DisclosureSEC source: 0001140361-17-043827 · doc1.xml · derivative · entry 10 Chao James · CIK 0001299505 · Director · Chairman · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 12,321 Underlying: Common Stock · 23,917 shares Expires 2025-02-20 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F4 · derivative.exercise_date: The stock options are excercisable in three equal installments on February 20, 2016, 2017 and 2018. Read SEC document |
| November 24, 2017 Filed Nov 27, 2017 12:33 UTC |
Chao JamesDirector · Chairman · 10% owner
|
Exercise / conversionEmployee Option (right to buy) · Derivative | 10,109 | $0.00 Strike: $45.70 | $0.00 |
DisclosureSEC source: 0001140361-17-043827 · doc1.xml · derivative · entry 9 Chao James · CIK 0001299505 · Director · Chairman · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 0 Underlying: Common Stock · 10,109 shares Expires 2023-02-15 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F3 · derivative.exercise_date: The stock options are excercisable in three equal installments on February 15, 2014, 2015 and 2016. Read SEC document |
| November 24, 2017 Filed Nov 27, 2017 12:33 UTC |
Chao JamesDirector · Chairman · 10% owner
|
SaleCommon Stock | 66,026 | $94.61 | $6,246,785.89 |
DisclosureSEC source: 0001140361-17-043827 · doc1.xml · nonDerivative · entry 6 Chao James · CIK 0001299505 · Director · Chairman · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 118,969 F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $94.11 to $94.90, inclusive. The reporting person undertakes to provide to Westlake Chemical Corp., any security holder of Westlake Chemical Corp. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote Read SEC document |
| November 24, 2017 Filed Nov 27, 2017 12:33 UTC |
Chao JamesDirector · Chairman · 10% owner
|
Exercise / conversionCommon Stock | 32,000 | $63.98 | $2,047,280.00 |
DisclosureSEC source: 0001140361-17-043827 · doc1.xml · nonDerivative · entry 5 Chao James · CIK 0001299505 · Director · Chairman · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 184,995 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| November 24, 2017 Filed Nov 27, 2017 12:33 UTC |
Chao JamesDirector · Chairman · 10% owner
|
Exercise / conversionCommon Stock | 23,917 | $68.09 | $1,628,508.53 |
DisclosureSEC source: 0001140361-17-043827 · doc1.xml · nonDerivative · entry 4 Chao James · CIK 0001299505 · Director · Chairman · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 152,995 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| November 24, 2017 Filed Nov 27, 2017 12:33 UTC |
Chao JamesDirector · Chairman · 10% owner
|
Exercise / conversionCommon Stock | 10,109 | $45.70 | $461,956.03 |
DisclosureSEC source: 0001140361-17-043827 · doc1.xml · nonDerivative · entry 3 Chao James · CIK 0001299505 · Director · Chairman · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 129,078 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| November 24, 2017 Filed Nov 27, 2017 17:40 UTC |
Chao AlbertDirector · President & CEO · 10% owner
|
Exercise / conversionEmployee Option (right to buy) · Derivative | 20,000 | $0.00 Strike: $9.65 | $0.00 |
DisclosureSEC source: 0001140361-17-043829 · doc1.xml · derivative · entry 8 Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 66,844 Underlying: Common Stock · 20,000 shares Expires 2018-02-15 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F4 · derivative.exercise_date: The stock options are excercisable in three equal installments on February 15, 2009, 2010 and 2011. Read SEC document |
| November 24, 2017 Filed Nov 27, 2017 17:40 UTC |
Chao AlbertDirector · President & CEO · 10% owner
|
SaleCommon Stock | 20,000 | $94.58 | $1,891,680.00 |
DisclosureSEC source: 0001140361-17-043829 · doc1.xml · nonDerivative · entry 5 Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 274,018 F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $94.50 to $95.35, inclusive. The reporting person undertakes to provide to Westlake Chemical Corp., any security holder of Westlake Chemical Corp. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. Read SEC document |
| November 24, 2017 Filed Nov 27, 2017 17:40 UTC |
Chao AlbertDirector · President & CEO · 10% owner
|
Exercise / conversionCommon Stock | 20,000 | $9.65 | $192,900.00 |
DisclosureSEC source: 0001140361-17-043829 · doc1.xml · nonDerivative · entry 4 Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 294,018 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| November 22, 2017 Filed Nov 27, 2017 12:33 UTC |
Chao JamesDirector · Chairman · 10% owner
|
Exercise / conversionEmployee Option (right to buy) · Derivative | 10,109 | $0.00 Strike: $45.70 | $0.00 |
DisclosureSEC source: 0001140361-17-043827 · doc1.xml · derivative · entry 8 Chao James · CIK 0001299505 · Director · Chairman · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 10,109 Underlying: Common Stock · 10,109 shares Expires 2023-02-15 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F3 · derivative.exercise_date: The stock options are excercisable in three equal installments on February 15, 2014, 2015 and 2016. Read SEC document |
| November 22, 2017 Filed Nov 27, 2017 12:33 UTC |
Chao JamesDirector · Chairman · 10% owner
|
SaleCommon Stock | 10,109 | $95.20 | $962,407.13 |
DisclosureSEC source: 0001140361-17-043827 · doc1.xml · nonDerivative · entry 2 Chao James · CIK 0001299505 · Director · Chairman · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 118,969 F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $95.00 to $95.40, inclusive. The reporting person undertakes to provide to Westlake Chemical Corp., any security holder of Westlake Chemical Corp. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. Read SEC document |
| November 22, 2017 Filed Nov 27, 2017 12:33 UTC |
Chao JamesDirector · Chairman · 10% owner
|
Exercise / conversionCommon Stock | 10,109 | $45.70 | $461,956.03 |
DisclosureSEC source: 0001140361-17-043827 · doc1.xml · nonDerivative · entry 1 Chao James · CIK 0001299505 · Director · Chairman · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 129,078 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| November 22, 2017 Filed Nov 27, 2017 17:40 UTC |
Chao AlbertDirector · President & CEO · 10% owner
|
Exercise / conversionEmployee Option (right to buy) · Derivative | 25,000 | $0.00 Strike: $9.65 | $0.00 |
DisclosureSEC source: 0001140361-17-043829 · doc1.xml · derivative · entry 7 Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 86,844 Underlying: Common Stock · 25,000 shares Expires 2018-02-15 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F4 · derivative.exercise_date: The stock options are excercisable in three equal installments on February 15, 2009, 2010 and 2011. Read SEC document |
| November 22, 2017 Filed Nov 27, 2017 17:40 UTC |
Chao AlbertDirector · President & CEO · 10% owner
|
SaleCommon Stock | 101 | $95.60 | $9,655.80 |
DisclosureSEC source: 0001140361-17-043829 · doc1.xml · nonDerivative · entry 3 Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 274,018 F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $95.60 to $95.76, inclusive. The reporting person undertakes to provide to Westlake Chemical Corp., any security holder of Westlake Chemical Corp. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. Read SEC document |
| November 22, 2017 Filed Nov 27, 2017 17:40 UTC |
Chao AlbertDirector · President & CEO · 10% owner
|
SaleCommon Stock | 24,899 | $94.89 | $2,362,740.81 |
DisclosureSEC source: 0001140361-17-043829 · doc1.xml · nonDerivative · entry 2 Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 274,119 F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $94.595 to $95.53, inclusive. The reporting person undertakes to provide to Westlake Chemical Corp., any security holder of Westlake Chemical Corp. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. Read SEC document |
| November 22, 2017 Filed Nov 27, 2017 17:40 UTC |
Chao AlbertDirector · President & CEO · 10% owner
|
Exercise / conversionCommon Stock | 25,000 | $9.65 | $241,125.00 |
DisclosureSEC source: 0001140361-17-043829 · doc1.xml · nonDerivative · entry 1 Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 299,018 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| November 21, 2017 Filed Nov 22, 2017 16:10 UTC |
Chao AlbertDirector · President & CEO · 10% owner
|
Exercise / conversionEmployee Option (right to buy) · Derivative | 25,000 | $0.00 Strike: $9.65 | $0.00 |
DisclosureSEC source: 0001140361-17-043634 · doc1.xml · derivative · entry 4 Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 111,844 Underlying: Common Stock · 25,000 shares Expires 2018-02-15 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F2 · derivative.exercise_date: The stock options are excercisable in three equal installments on February 15, 2009, 2010 and 2011. Read SEC document |
| November 21, 2017 Filed Nov 22, 2017 16:10 UTC |
Chao AlbertDirector · President & CEO · 10% owner
|
SaleCommon stock | 25,000 | $94.34 | $2,358,375.00 |
DisclosureSEC source: 0001140361-17-043634 · doc1.xml · nonDerivative · entry 2 Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 274,018 F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $94.08 to $94.78, inclusive. The reporting person undertakes to provide to Westlake Chemical Corp., any security holder of Westlake Chemical Corp. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. Read SEC document |
| November 21, 2017 Filed Nov 22, 2017 16:10 UTC |
Chao AlbertDirector · President & CEO · 10% owner
|
Exercise / conversionCommon Stock | 25,000 | $9.65 | $241,125.00 |
DisclosureSEC source: 0001140361-17-043634 · doc1.xml · nonDerivative · entry 1 Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 299,018 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| November 21, 2017 Filed Nov 22, 2017 15:50 UTC |
Bender Mark StevenEVP and CFO
|
SaleCommon Stock | 20,382 | $94.27 | $1,921,309.23 |
DisclosureSEC source: 0001140361-17-043632 · doc1.xml · nonDerivative · entry 1 Bender Mark Steven · CIK 0001330417 · EVP and CFO 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 24,067 F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $94.095 to $94.615, inclusive. The reporting person undertakes to provide to Westlake Chemical Corp., any security holder of Westlake Chemical Corp. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. Read SEC document |
| November 17, 2017 Filed Nov 20, 2017 09:45 UTC |
Buesinger Robert F.EVP, Vinyls Products
|
SaleCommon Stock | 5,214 | $93.82 | $489,199.38 |
DisclosureSEC source: 0001140361-17-043287 · doc1.xml · nonDerivative · entry 2 Buesinger Robert F. · CIK 0001488587 · EVP, Vinyls Products 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 9,309 Read SEC document |
| November 17, 2017 Filed Nov 20, 2017 09:45 UTC |
Buesinger Robert F.EVP, Vinyls Products
|
Exercise / conversionCommon Stock | 5,214 | $63.98 | $333,578.69 |
DisclosureSEC source: 0001140361-17-043287 · doc1.xml · nonDerivative · entry 1 Buesinger Robert F. · CIK 0001488587 · EVP, Vinyls Products 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 14,523 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| November 14, 2017 Filed Nov 15, 2017 15:11 UTC |
BLAKELY ROBERT TDirector
|
SaleCommon Stock | 4,367 | $92.33 | $403,190.26 |
DisclosureSEC source: 0001140361-17-042929 · doc1.xml · nonDerivative · entry 1 BLAKELY ROBERT T · CIK 0001218020 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 11,700 F1 · price: In accordance with the Securities and Exchange Commission's No Action Letter dated June 25, 2008, we have aggregated the sales that occurred on November 14, 2017 for ease of reporting. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $92.09 to $92.57, inclusive. The reporting person undertakes to provide to Westlake Chemical Corp., any security holder of Westlake Chemical Corp. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (1) to this Form 4. Read SEC document |
| November 14, 2017 Filed Nov 20, 2017 09:45 UTC |
Buesinger Robert F.EVP, Vinyls Products
|
Exercise / conversionEmployee Option (right to buy) · Derivative | 5,214 | $0.00 Strike: $63.98 | $0.00 |
DisclosureSEC source: 0001140361-17-043287 · doc1.xml · derivative · entry 3 Buesinger Robert F. · CIK 0001488587 · EVP, Vinyls Products 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 0 Underlying: Common Stock · 5,214 shares Expires 2024-02-14 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · derivative.exercise_date: The stock options are excercisable in three installments of 33%, 33% and 34% on February 14, 2015, 2016 and 2017. Read SEC document |
| November 13, 2017 Filed Nov 15, 2017 09:48 UTC |
Mangieri George JSVP & Chief Accounting Officer
|
Exercise / conversionEmployee Option (right to buy) · Derivative | 2,010 | $0.00 Strike: $68.09 | $0.00 |
DisclosureSEC source: 0001140361-17-042925 · doc1.xml · derivative · entry 10 Mangieri George J · CIK 0001298504 · SVP & Chief Accounting Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 1,036 Underlying: Common Stock · 2,010 shares Expires 2025-02-20 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F4 · derivative.exercise_date: The stock options are excercisable in three installments of 33%, 33% and 34% on February 20, 2016, 2017 and 2018, respectively. Read SEC document |
| November 13, 2017 Filed Nov 15, 2017 09:48 UTC |
Mangieri George JSVP & Chief Accounting Officer
|
Exercise / conversionEmployee Option (right to buy) · Derivative | 1,810 | $0.00 Strike: $44.42 | $0.00 |
DisclosureSEC source: 0001140361-17-042925 · doc1.xml · derivative · entry 9 Mangieri George J · CIK 0001298504 · SVP & Chief Accounting Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 3,675 Underlying: Common Stock · 1,810 shares Expires 2026-02-18 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F3 · derivative.exercise_date: The stock options are excercisable in three installments of 33%, 33% and 34% on February 18, 2017, 2018 and 2019, respectively. Read SEC document |
| November 13, 2017 Filed Nov 15, 2017 09:48 UTC |
Mangieri George JSVP & Chief Accounting Officer
|
Exercise / conversionEmployee Option (right to buy) · Derivative | 3,028 | $0.00 Strike: $63.98 | $0.00 |
DisclosureSEC source: 0001140361-17-042925 · doc1.xml · derivative · entry 8 Mangieri George J · CIK 0001298504 · SVP & Chief Accounting Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 0 Underlying: Common Stock · 3,028 shares Expires 2024-02-14 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F2 · derivative.exercise_date: The stock options are excercisable in three installments of 33%, 33% and 34% on February 14, 2015, 2016 and 2017, respectively. Read SEC document |
| November 13, 2017 Filed Nov 15, 2017 09:48 UTC |
Mangieri George JSVP & Chief Accounting Officer
|
Exercise / conversionEmployee Option (right to buy) · Derivative | 3,618 | $0.00 Strike: $45.70 | $0.00 |
DisclosureSEC source: 0001140361-17-042925 · doc1.xml · derivative · entry 7 Mangieri George J · CIK 0001298504 · SVP & Chief Accounting Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 0 Underlying: Common Stock · 3,618 shares Expires 2023-02-15 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · derivative.exercise_date: The stock options are excercisable in three installments of 33%, 33% and 34% on February 15, 2014, 2015 and 2016, respectively. Read SEC document |
| November 13, 2017 Filed Nov 15, 2017 09:48 UTC |
Mangieri George JSVP & Chief Accounting Officer
|
SaleCommon Stock | 2,915 | $94.70 | $276,050.50 |
DisclosureSEC source: 0001140361-17-042925 · doc1.xml · nonDerivative · entry 6 Mangieri George J · CIK 0001298504 · SVP & Chief Accounting Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 3,662 Read SEC document |
| November 13, 2017 Filed Nov 15, 2017 09:48 UTC |
Mangieri George JSVP & Chief Accounting Officer
|
SaleCommon Stock | 10,466 | $94.37 | $987,715.14 |
DisclosureSEC source: 0001140361-17-042925 · doc1.xml · nonDerivative · entry 5 Mangieri George J · CIK 0001298504 · SVP & Chief Accounting Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 6,577 F5 · price: In accordance with the Securities and Exchange Commission's No Action Letter dated June 25, 2008, we have aggregated the sales that occurred on November 13, 2017 for ease of reporting. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $94.00 to $94.70, inclusive. The reporting person undertakes to provide to Westlake Chemical Corp., any security holder of Westlake Chemical Corp. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (5) to this Form 4. Read SEC document |
Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.