TapewireFind a company

person · Reporting owner

Chao Albert

Disclosed activity across 2 companies

Tapewire entity
24564
SEC CIK
0001299403

Export transaction history ↓

Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
WESTLAKE CORPWLK · Entity 3555Director · Executive ChairmanAugust 11, 2026August 11, 2026
Westlake Chemical Partners LPWLKP · Entity 5149Director · President & CEO · 10% ownerMarch 24, 2020March 25, 2020

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

WESTLAKE CORP

Report date August 11, 2026 · Filed August 11, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect642,880 Ending reported balance After 2026-08-11 transaction · row 3
3 source rows · reconciled sequence

Row 1 · 2026-08-11 · Exercise / conversion · Acquired 38,873 · Balance 681,753

Row 2 · 2026-08-11 · Sale · Disposed 7,489 · Balance 674,264

F1: Weighted average price. These shares were sold in multiple transactions ranging from $79.02 to $80.01 inclusive. The reporting person undertakes to provide the issuer, any security holder of the issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

Row 3 · 2026-08-11 · Sale · Disposed 31,384 · Balance 642,880

F2: Weighted average price. These shares were sold in multiple transactions ranging from $80.10 to $80.86 inclusive. The reporting person undertakes to provide the issuer, any security holder of the issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

Employee Option (right to buy)SEC Table II · derivative / convertible security · Conversion / exercise price $61.87 · Expires 2027-02-17Direct38,873 Reported balance After 2026-08-11 transaction · row 4 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 4 · 2026-08-11 · Exercise / conversion · Disposed 38,873 · Balance 38,873

F3: The stock options are exercisable in three installments of 33%, 33% and 34% on February 17, 2018, 2019 and 2020, respectively.

Filing footnotes · ownership attribution and instrument terms

F1: Weighted average price. These shares were sold in multiple transactions ranging from $79.02 to $80.01 inclusive. The reporting person undertakes to provide the issuer, any security holder of the issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F2: Weighted average price. These shares were sold in multiple transactions ranging from $80.10 to $80.86 inclusive. The reporting person undertakes to provide the issuer, any security holder of the issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F3: The stock options are exercisable in three installments of 33%, 33% and 34% on February 17, 2018, 2019 and 2020, respectively.

Westlake Chemical Partners LP

Report date March 24, 2020 · Filed March 25, 2020

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common Units (Limited Partner Interests)SEC Table I · non-derivativeDirect166,435 Ending reported balance After 2020-03-24 transaction · row 2
2 source rows · reconciled sequence

Row 1 · 2020-03-24 · Purchase · Acquired 3,200 · Balance 164,856

F1: The price reported in Column 4 is a weighted average price. These common units were purchased in multiple transactions ranging from $12.81 to $13.75, inclusive. The reporting person undertakes to provide to Westlake Chemical Partners LP, any security holder of Westlake Chemical Partners LP or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of common units purchased at each separate price within the ranges set forth in this footnote.

Row 2 · 2020-03-24 · Purchase · Acquired 1,579 · Balance 166,435

F2: The price reported in Column 4 is a weighted average price. These common units were purchased in multiple transactions ranging from $13.85 to $14.45, inclusive. The reporting person undertakes to provide to Westlake Chemical Partners LP, any security holder of Westlake Chemical Partners LP or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of common units purchased at each separate price within the ranges set forth in this footnote.

Common Units (Limited Partner Interests)SEC Table I · non-derivativeIndirectby Trusts27,275 Reported balance Holding disclosure · report date 2020-03-24 · row 3 Holding and transaction disclosures are not merged.
1 source row

Row 3 · Balance 27,275

Common Units (Limited Partner Interests)SEC Table I · non-derivativeIndirectTTWF LP & TTWFGP LLC14,122,230 Reported balance Holding disclosure · report date 2020-03-24 · row 4 Holding and transaction disclosures are not merged.
1 source row

Row 4 · Balance 14,122,230

F3: WPT LLC ("WPT") owns 14,122,230 common units ("Common Units") representing limited partner interests in the Issuer. Westlake Chemical Corporation ("Westlake") owns 100% of each of Westlake Olefins LLC ("Olefins"), Westlake Vinyl Corporation ("Vinyl") and Westlake Longview Corporation ("Longview"). Olefins owns 100% of Westlake Chemical Investments, lnc., which owns 84.25% of Westlake Polymers LLC ("Polymers"). Vinyl owns 100% of Westlake Vinyls, Inc., which owns 12.95% Polymers. Longview owns 2.80% of Polymers. Polymers owns 100% of WPT LLC. The reporting person may be deemed to indirectly own the Common Units through his ownership interest in TTWF LP, a Delaware limited partnership through which the reporting person indirectly holds 92,970,554 shares of Westlake.

F4: Two trusts for the benefit of members of the Chao family, including the reporting person, are the managers of TTWF GP LLC, a Delaware limited liability company that is the general partner of TTWF LP. The limited partners of TTWF LP are five trusts, principally for the benefit of members of the Chao family, including the reporting person, and two corporations owned, indirectly or directly, by certain of these trusts and by other entities owned by members of the Chao family, including the reporting person. The reporting person shares investment and voting power with respect to the common units beneficially owned by TTWF LP. The reporting person disclaims beneficial ownership of the Common Units except to the extent of his pecuniary interest therein.

Filing footnotes · ownership attribution and instrument terms

F1: The price reported in Column 4 is a weighted average price. These common units were purchased in multiple transactions ranging from $12.81 to $13.75, inclusive. The reporting person undertakes to provide to Westlake Chemical Partners LP, any security holder of Westlake Chemical Partners LP or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of common units purchased at each separate price within the ranges set forth in this footnote.

F2: The price reported in Column 4 is a weighted average price. These common units were purchased in multiple transactions ranging from $13.85 to $14.45, inclusive. The reporting person undertakes to provide to Westlake Chemical Partners LP, any security holder of Westlake Chemical Partners LP or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of common units purchased at each separate price within the ranges set forth in this footnote.

F3: WPT LLC ("WPT") owns 14,122,230 common units ("Common Units") representing limited partner interests in the Issuer. Westlake Chemical Corporation ("Westlake") owns 100% of each of Westlake Olefins LLC ("Olefins"), Westlake Vinyl Corporation ("Vinyl") and Westlake Longview Corporation ("Longview"). Olefins owns 100% of Westlake Chemical Investments, lnc., which owns 84.25% of Westlake Polymers LLC ("Polymers"). Vinyl owns 100% of Westlake Vinyls, Inc., which owns 12.95% Polymers. Longview owns 2.80% of Polymers. Polymers owns 100% of WPT LLC. The reporting person may be deemed to indirectly own the Common Units through his ownership interest in TTWF LP, a Delaware limited partnership through which the reporting person indirectly holds 92,970,554 shares of Westlake.

F4: Two trusts for the benefit of members of the Chao family, including the reporting person, are the managers of TTWF GP LLC, a Delaware limited liability company that is the general partner of TTWF LP. The limited partners of TTWF LP are five trusts, principally for the benefit of members of the Chao family, including the reporting person, and two corporations owned, indirectly or directly, by certain of these trusts and by other entities owned by members of the Chao family, including the reporting person. The reporting person shares investment and voting power with respect to the common units beneficially owned by TTWF LP. The reporting person disclaims beneficial ownership of the Common Units except to the extent of his pecuniary interest therein.

Transaction history

JSON API
Reset

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 dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
November 06, 2020 Filed Nov 10, 2020 15:05 UTC WESTLAKE CORP WLK · Entity 3555 SaleCommon Stock 11,978 $73.30 $877,987.40
Disclosure

SEC source: 0001567619-20-019004 · doc1.xml · nonDerivative · entry 3

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 442,188

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $72.82 to $73.79, 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 06, 2020 Filed Nov 10, 2020 15:05 UTC WESTLAKE CORP WLK · Entity 3555 SaleCommon Stock 28,638 $72.08 $2,064,227.04
Disclosure

SEC source: 0001567619-20-019004 · doc1.xml · nonDerivative · entry 2

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 454,166

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $71.80 to $72.80, 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 06, 2020 Filed Nov 10, 2020 15:05 UTC WESTLAKE CORP WLK · Entity 3555 Exercise / conversionCommon Stock 55,148 $22.92 $1,263,716.42
Disclosure

SEC source: 0001567619-20-019004 · doc1.xml · nonDerivative · entry 1

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 482,804

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
March 24, 2020 Filed Mar 25, 2020 14:24 UTC Westlake Chemical Partners LP WLKP · Entity 5149 PurchaseCommon Units (Limited Partner Interests) 1,579 $14.18 $22,390.22
Disclosure

SEC source: 0001567619-20-006978 · doc1.xml · nonDerivative · entry 2

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 166,435

F2 · price: The price reported in Column 4 is a weighted average price. These common units were purchased in multiple transactions ranging from $13.85 to $14.45, inclusive. The reporting person undertakes to provide to Westlake Chemical Partners LP, any security holder of Westlake Chemical Partners LP or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of common units purchased at each separate price within the ranges set forth in this footnote.

Read SEC document
March 24, 2020 Filed Mar 25, 2020 14:24 UTC Westlake Chemical Partners LP WLKP · Entity 5149 PurchaseCommon Units (Limited Partner Interests) 3,200 $13.46 $43,072.00
Disclosure

SEC source: 0001567619-20-006978 · doc1.xml · nonDerivative · entry 1

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 164,856

F1 · price: The price reported in Column 4 is a weighted average price. These common units were purchased in multiple transactions ranging from $12.81 to $13.75, inclusive. The reporting person undertakes to provide to Westlake Chemical Partners LP, any security holder of Westlake Chemical Partners LP or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of common units purchased at each separate price within the ranges set forth in this footnote.

Read SEC document
March 23, 2020 Filed Mar 24, 2020 12:44 UTC Westlake Chemical Partners LP WLKP · Entity 5149 PurchaseCommon Units (Limited Partner Interests) 4,780 $13.12 $62,713.60
Disclosure

SEC source: 0001567619-20-006926 · doc1.xml · nonDerivative · entry 1

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 161,656

F1 · price: The price reported in Column 4 is a weighted average price. These common units were purchased in multiple transactions ranging from $12.61 to $13.49, inclusive. The reporting person undertakes to provide to Westlake Chemical Partners LP, any security holder of Westlake Chemical Partners LP or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of common units purchased at each separate price within the ranges set forth in this footnote.

Read SEC document
March 20, 2020 Filed Mar 23, 2020 11:45 UTC Westlake Chemical Partners LP WLKP · Entity 5149 PurchaseCommon Units (Limited Partner Interests) 1,400 $14.28 $19,992.00
Disclosure

SEC source: 0001567619-20-006871 · doc1.xml · nonDerivative · entry 2

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 156,876

F2 · price: The price reported in Column 4 is a weighted average price. These common units were purchased in multiple transactions ranging from $14.16 to $14.34, inclusive. The reporting person undertakes to provide to Westlake Chemical Partners LP, any security holder of Westlake Chemical Partners LP or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of common units purchased at each separate price within the ranges set forth in this footnote.

Read SEC document
March 20, 2020 Filed Mar 23, 2020 11:45 UTC Westlake Chemical Partners LP WLKP · Entity 5149 PurchaseCommon Units (Limited Partner Interests) 12,281 $13.86 $170,214.66
Disclosure

SEC source: 0001567619-20-006871 · doc1.xml · nonDerivative · entry 1

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 155,476

F1 · price: The price reported in Column 4 is a weighted average price. These common units were purchased in multiple transactions ranging from $13.12 to $14.11, inclusive. The reporting person undertakes to provide to Westlake Chemical Partners LP, any security holder of Westlake Chemical Partners LP or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of common units purchased at each separate price within the ranges set forth in this footnote.

Read SEC document
March 19, 2020 Filed Mar 20, 2020 13:19 UTC Westlake Chemical Partners LP WLKP · Entity 5149 PurchaseCommon Units (Limited Partner Interests) 7,035 $14.20 $99,897.00
Disclosure

SEC source: 0001567619-20-006809 · doc1.xml · nonDerivative · entry 2

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 143,195

F2 · price: The price reported in Column 4 is a weighted average price. These common units were purchased in multiple transactions ranging from $13.66 to $14.50, inclusive. The reporting person undertakes to provide to Westlake Chemical Partners LP, any security holder of Westlake Chemical Partners LP or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of common units purchased at each separate price within the ranges set forth in this footnote.

Read SEC document
March 19, 2020 Filed Mar 20, 2020 13:19 UTC Westlake Chemical Partners LP WLKP · Entity 5149 PurchaseCommon Units (Limited Partner Interests) 2,100 $12.44 $26,124.00
Disclosure

SEC source: 0001567619-20-006809 · doc1.xml · nonDerivative · entry 1

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 136,160

F1 · price: The price reported in Column 4 is a weighted average price. These common units were purchased in multiple transactions ranging from $12.06 to $12.75, inclusive. The reporting person undertakes to provide to Westlake Chemical Partners LP, any security holder of Westlake Chemical Partners LP or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of common units purchased at each separate price within the ranges set forth in this footnote.

Read SEC document
March 18, 2020 Filed Mar 19, 2020 14:10 UTC Westlake Chemical Partners LP WLKP · Entity 5149 PurchaseCommon Units (Limited Partner Interests) 5,796 $12.12 $70,247.52
Disclosure

SEC source: 0001567619-20-006724 · doc1.xml · nonDerivative · entry 2

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 134,060

F2 · price: The price reported in Column 4 is a weighted average price. These common units were purchased in multiple transactions ranging from $11.89 to $12.55, inclusive. The reporting person undertakes to provide to Westlake Chemical Partners LP, any security holder of Westlake Chemical Partners LP or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of common units purchased at each separate price within the ranges set forth in this footnote.

Read SEC document
March 18, 2020 Filed Mar 19, 2020 14:10 UTC Westlake Chemical Partners LP WLKP · Entity 5149 PurchaseCommon Units (Limited Partner Interests) 10,178 $11.43 $116,334.54
Disclosure

SEC source: 0001567619-20-006724 · doc1.xml · nonDerivative · entry 1

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 128,264

F1 · price: The price reported in Column 4 is a weighted average price. These common units were purchased in multiple transactions ranging from $10.88 to $11.87, inclusive. The reporting person undertakes to provide to Westlake Chemical Partners LP, any security holder of Westlake Chemical Partners LP or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of common units purchased at each separate price within the ranges set forth in this footnote.

Read SEC document
March 17, 2020 Filed Mar 18, 2020 13:20 UTC Westlake Chemical Partners LP WLKP · Entity 5149 PurchaseCommon Units (Limited Partner Interests) 3,680 $14.26 $52,476.80
Disclosure

SEC source: 0001567619-20-006642 · doc1.xml · nonDerivative · entry 2

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 118,086

F2 · price: The price reported in Column 4 is a weighted average price. These common units were purchased in multiple transactions ranging from $14.09 to $14.50, inclusive. The reporting person undertakes to provide to Westlake Chemical Partners LP, any security holder of Westlake Chemical Partners LP or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of common units purchased at each separate price within the ranges set forth in this footnote.

Read SEC document
March 17, 2020 Filed Mar 18, 2020 13:20 UTC Westlake Chemical Partners LP WLKP · Entity 5149 PurchaseCommon Units (Limited Partner Interests) 6,856 $13.59 $93,173.04
Disclosure

SEC source: 0001567619-20-006642 · doc1.xml · nonDerivative · entry 1

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 114,406

F1 · price: The price reported in Column 4 is a weighted average price. These common units were purchased in multiple transactions ranging from $13.08 to $14.06, inclusive. The reporting person undertakes to provide to Westlake Chemical Partners LP, any security holder of Westlake Chemical Partners LP or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of common units purchased at each separate price within the ranges set forth in this footnote.

Read SEC document
March 16, 2020 Filed Mar 17, 2020 12:05 UTC Westlake Chemical Partners LP WLKP · Entity 5149 PurchaseCommon Units (Limited Partner Interests) 7,535 $14.15 $106,620.25
Disclosure

SEC source: 0001567619-20-006511 · doc1.xml · nonDerivative · entry 1

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 107,550

F1 · price: The price reported in Column 4 is a weighted average price. These common units were purchased in multiple transactions ranging from $13.56 to $14.41, inclusive. The reporting person undertakes to provide to Westlake Chemical Partners LP, any security holder of Westlake Chemical Partners LP or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of common units purchased at each separate price within the ranges set forth in this footnote.

Read SEC document
March 13, 2020 Filed Mar 16, 2020 13:32 UTC Westlake Chemical Partners LP WLKP · Entity 5149 PurchaseCommon Units (Limited Partner Interests) 3,580 $15.18 $54,344.40
Disclosure

SEC source: 0001567619-20-006359 · doc1.xml · nonDerivative · entry 1

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 100,015

F1 · price: The price reported in Column 4 is a weighted average price. These common units were purchased in multiple transactions ranging from $14.40 to $15.38, inclusive. The reporting person undertakes to provide to Westlake Chemical Partners LP, any security holder of Westlake Chemical Partners LP or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of common units purchased at each separate price within the ranges set forth in this footnote.

Read SEC document
February 26, 2020 Filed Feb 27, 2020 17:07 UTC WESTLAKE CORP WLK · Entity 3555 Exercise / conversionEmployee Option (right to buy) · Derivative 57,800 $0.00 Strike: $10.26 $0.00
Disclosure

SEC source: 0001567619-20-004940 · doc1.xml · derivative · entry 3

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 57,800 shares

Expires 2020-02-26

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 equal installments on February 26, 2011, 2012 and 2013.

Read SEC document
February 21, 2020 Filed Feb 24, 2020 17:08 UTC WESTLAKE CORP WLK · Entity 3555 Exercise / conversionEmployee Option (right to buy) · Derivative 68,698 $0.00 Strike: $10.26 $0.00
Disclosure

SEC source: 0001567619-20-004651 · doc1.xml · derivative · entry 4

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 57,800

Underlying: Common Stock · 68,698 shares

Expires 2020-02-26

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 26, 2011, 2012 and 2013.

Read SEC document
February 21, 2020 Filed Feb 24, 2020 17:08 UTC WESTLAKE CORP WLK · Entity 3555 SaleCommon Stock 51,592 $62.42 $3,220,372.64
Disclosure

SEC source: 0001567619-20-004651 · doc1.xml · nonDerivative · entry 2

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 369,856

F1 · kind: A portion of the sale proceeds were used to cover the strike price and related taxes in regards to the excercise of the options disclosed in Table II.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $62.15 to $62.72, 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
February 21, 2020 Filed Feb 24, 2020 17:08 UTC WESTLAKE CORP WLK · Entity 3555 Exercise / conversionCommon Stock 68,698 $10.26 $704,841.48
Disclosure

SEC source: 0001567619-20-004651 · doc1.xml · nonDerivative · entry 1

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 421,448

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
February 21, 2020 Filed Feb 27, 2020 17:07 UTC WESTLAKE CORP WLK · Entity 3555 Exercise / conversionCommon Stock 57,800 $10.26 $593,028.00
Disclosure

SEC source: 0001567619-20-004940 · doc1.xml · nonDerivative · entry 1

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 427,656

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
February 18, 2020 Filed Feb 19, 2020 20:32 UTC WESTLAKE CORP WLK · Entity 3555 Tax withholdingCommon Stock 380 $61.26 $23,279.18
Disclosure

SEC source: 0001567619-20-004288 · doc1.xml · nonDerivative · entry 3

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 352,750

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $61.14 to $61.80, 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
February 18, 2020 Filed Feb 19, 2020 20:32 UTC WESTLAKE CORP WLK · Entity 3555 Tax withholdingCommon Stock 5,711 $60.50 $345,515.50
Disclosure

SEC source: 0001567619-20-004288 · doc1.xml · nonDerivative · entry 2

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 353,130

Read SEC document
February 17, 2020 Filed Feb 19, 2020 20:32 UTC WESTLAKE CORP WLK · Entity 3555 Exercise / conversionRestricted Stock Units · Derivative 19,902 $0.00 $0.00
Disclosure

SEC source: 0001567619-20-004288 · doc1.xml · derivative · entry 5

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 19,902 shares

Expires not disclosed

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_price: Restricted stock units convert into Issuer's shares of common stock on a one-for-one basis.

F2 · derivative.exercise_date: On February 17, 2017, the reporting person was granted 19,902 restricted stock units vesting on the third anniversary of the grant date.

F2 · derivative.expiration_date: On February 17, 2017, the reporting person was granted 19,902 restricted stock units vesting on the third anniversary of the grant date.

Read SEC document
February 17, 2020 Filed Feb 19, 2020 20:32 UTC WESTLAKE CORP WLK · Entity 3555 Exercise / conversionCommon Stock 19,902 Not disclosed Not disclosed
Disclosure

SEC source: 0001567619-20-004288 · doc1.xml · nonDerivative · entry 1

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 358,841

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 · price: Restricted stock units convert into Issuer's shares of common stock on a one-for-one basis.

Read SEC document
February 14, 2020 Filed Feb 18, 2020 12:07 UTC WESTLAKE CORP WLK · Entity 3555 GrantRestricted Stock Units · Derivative 3,966 $0.00 $0.00
Disclosure

SEC source: 0001567619-20-004121 · doc1.xml · derivative · entry 3

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,966

Underlying: Common Stock · 3,966 shares

Expires not disclosed

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

F4 · derivative.exercise_date: All of these restricted stock units will vest on February 14, 2021.

F4 · derivative.expiration_date: All of these restricted stock units will vest on February 14, 2021.

Read SEC document
February 14, 2020 Filed Feb 18, 2020 12:07 UTC WESTLAKE CORP WLK · Entity 3555 GrantRestricted Stock Units · Derivative 26,048 $0.00 $0.00
Disclosure

SEC source: 0001567619-20-004121 · doc1.xml · derivative · entry 2

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,048

Underlying: Common Stock · 26,048 shares

Expires not disclosed

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

F3 · derivative.exercise_date: All of these restricted stock units will vest on February 14, 2023.

F3 · derivative.expiration_date: All of these restricted stock units will vest on February 14, 2023.

Read SEC document
February 14, 2020 Filed Feb 18, 2020 12:07 UTC WESTLAKE CORP WLK · Entity 3555 GrantEmployee Option (right to buy) · Derivative 110,186 $0.00 Strike: $65.81 $0.00
Disclosure

SEC source: 0001567619-20-004121 · doc1.xml · derivative · entry 1

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 110,186

Underlying: Common Stock · 110,186 shares

Expires 2030-02-14

F1 · derivative.exercise_date: The stock options are excercisable in three installments of 33%, 33% and 34% on February 14, 2021, 2022 and 2023, respectively.

Read SEC document
February 19, 2019 Filed Feb 20, 2019 18:46 UTC WESTLAKE CORP WLK · Entity 3555 Tax withholdingCommon Stock 622 $75.79 $47,141.38
Disclosure

SEC source: 0001567619-19-004967 · doc1.xml · nonDerivative · entry 3

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 338,939

Read SEC document
February 19, 2019 Filed Feb 20, 2019 18:46 UTC WESTLAKE CORP WLK · Entity 3555 Tax withholdingCommon Stock 6,547 $73.29 $479,829.63
Disclosure

SEC source: 0001567619-19-004967 · doc1.xml · nonDerivative · entry 2

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 339,561

Read SEC document
February 18, 2019 Filed Feb 20, 2019 18:46 UTC WESTLAKE CORP WLK · Entity 3555 Exercise / conversionRestricted Stock Units · Derivative 21,454 $0.00 $0.00
Disclosure

SEC source: 0001567619-19-004967 · doc1.xml · derivative · entry 5

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 21,454 shares

Expires not disclosed

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_price: Restricted stock units convert into Issuer's shares of common stock on a one-for-one basis.

F2 · derivative.exercise_date: On February 18, 2016, the reporting person was granted 21,454 restricted stock units vesting on the third anniversary of the grant date.

F2 · derivative.expiration_date: On February 18, 2016, the reporting person was granted 21,454 restricted stock units vesting on the third anniversary of the grant date.

Read SEC document
February 18, 2019 Filed Feb 20, 2019 18:46 UTC WESTLAKE CORP WLK · Entity 3555 Exercise / conversionCommon Stock 21,454 Not disclosed Not disclosed
Disclosure

SEC source: 0001567619-19-004967 · doc1.xml · nonDerivative · entry 1

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 346,108

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 · price: Restricted stock units convert into Issuer's shares of common stock on a one-for-one basis.

Read SEC document
February 15, 2019 Filed Feb 19, 2019 17:42 UTC WESTLAKE CORP WLK · Entity 3555 GrantRestricted Stock Units · Derivative 18,354 $0.00 $0.00
Disclosure

SEC source: 0001567619-19-004781 · doc1.xml · derivative · entry 2

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,354

Underlying: Common Stock · 18,354 shares

Expires not disclosed

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

F3 · derivative.exercise_date: All of the restricted stock units will vest on February 15, 2022.

F3 · derivative.expiration_date: All of the restricted stock units will vest on February 15, 2022.

Read SEC document
February 15, 2019 Filed Feb 19, 2019 17:42 UTC WESTLAKE CORP WLK · Entity 3555 GrantEmployee Option (right to buy) · Derivative 69,708 $0.00 Strike: $79.83 $0.00
Disclosure

SEC source: 0001567619-19-004781 · doc1.xml · derivative · entry 1

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 69,708

Underlying: Common Stock · 69,708 shares

Expires 2029-02-15

F1 · derivative.exercise_date: The stock options are excercisable in three installments of 33%, 33% and 34% on February 15, 2020, 2021 and 2022, respectively.

Read SEC document
November 19, 2018 Filed Nov 20, 2018 12:16 UTC Westlake Chemical Partners LP WLKP · Entity 5149 PurchaseCommon Units (Limited Partner Interests) 10,386 $23.24 $241,370.64
Disclosure

SEC source: 0001567619-18-006708 · doc1.xml · nonDerivative · entry 1

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 96,435

F1 · price: The price reported in Column 4 is a weighted average price. These common units were purchased in multiple transactions ranging from $23.21 to $23.31, inclusive. The reporting person undertakes to provide to Westlake Chemical Partners LP, any security holder of Westlake Chemical Partners LP or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of common units purchased at each separate price within the ranges set forth in this footnote.

Read SEC document
November 16, 2018 Filed Nov 19, 2018 14:48 UTC Westlake Chemical Partners LP WLKP · Entity 5149 PurchaseCommon Units (Limited Partner Interests) 12,452 $23.27 $289,758.04
Disclosure

SEC source: 0001567619-18-006578 · doc1.xml · nonDerivative · entry 2

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 86,049

F2 · price: The price reported in Column 4 is a weighted average price. These common units were purchased in multiple transactions ranging from $23.06 to $23.44, inclusive. The reporting person undertakes to provide to Westlake Chemical Partners LP, any security holder of Westlake Chemical Partners LP or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of common units purchased at each separate price within the ranges set forth in this footnote.

Read SEC document
November 16, 2018 Filed Nov 19, 2018 14:29 UTC WESTLAKE CORP WLK · Entity 3555 Exercise / conversionEmployee Option (right to buy) · Derivative 30,640 $0.00 Strike: $7.12 $0.00
Disclosure

SEC source: 0001567619-18-006577 · doc1.xml · derivative · entry 5

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 30,640 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.

F3 · derivative.exercise_date: The stock options are excercisable in three equal installments on February 13, 2009, 2010 and 2011.

Read SEC document
November 16, 2018 Filed Nov 19, 2018 14:29 UTC WESTLAKE CORP WLK · Entity 3555 SaleCommon Stock 7,120 $72.09 $513,295.04
Disclosure

SEC source: 0001567619-18-006577 · doc1.xml · nonDerivative · entry 3

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 324,654

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $71.97 to $72.26, 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 16, 2018 Filed Nov 19, 2018 14:29 UTC WESTLAKE CORP WLK · Entity 3555 SaleCommon Stock 17,389 $71.62 $1,245,313.24
Disclosure

SEC source: 0001567619-18-006577 · doc1.xml · nonDerivative · entry 2

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 331,774

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $70.96 to $71.96, 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 16, 2018 Filed Nov 19, 2018 14:29 UTC WESTLAKE CORP WLK · Entity 3555 Exercise / conversionCommon Stock 30,640 $7.12 $218,156.80
Disclosure

SEC source: 0001567619-18-006577 · doc1.xml · nonDerivative · entry 1

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 349,163

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 15, 2018 Filed Nov 16, 2018 18:06 UTC WESTLAKE CORP WLK · Entity 3555 Exercise / conversionEmployee Option (right to buy) · Derivative 30,640 $0.00 Strike: $7.12 $0.00
Disclosure

SEC source: 0001567619-18-006512 · doc1.xml · derivative · entry 11

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 30,640

Underlying: Common Stock · 30,640 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.

F7 · derivative.exercise_date: The stock options are excercisable in three equal installments on February 13, 2009, 2010 and 2011.

Read SEC document
November 15, 2018 Filed Nov 16, 2018 18:06 UTC WESTLAKE CORP WLK · Entity 3555 SaleCommon stock 1,100 $71.98 $79,181.30
Disclosure

SEC source: 0001567619-18-006512 · doc1.xml · nonDerivative · entry 8

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 318,523

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $71.93 to $72.06, 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 15, 2018 Filed Nov 16, 2018 18:06 UTC WESTLAKE CORP WLK · Entity 3555 SaleCommon stock 16,309 $71.48 $1,165,702.08
Disclosure

SEC source: 0001567619-18-006512 · doc1.xml · nonDerivative · entry 7

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 319,623

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $70.90 to $71.89, 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 15, 2018 Filed Nov 16, 2018 18:06 UTC WESTLAKE CORP WLK · Entity 3555 SaleCommon stock 7,100 $70.43 $500,060.10
Disclosure

SEC source: 0001567619-18-006512 · doc1.xml · nonDerivative · entry 6

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 335,932

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $69.87 to $70.86, 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 15, 2018 Filed Nov 16, 2018 18:06 UTC WESTLAKE CORP WLK · Entity 3555 Exercise / conversionCommon Stock 30,640 $7.12 $218,156.80
Disclosure

SEC source: 0001567619-18-006512 · doc1.xml · nonDerivative · entry 5

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 343,032

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 15, 2018 Filed Nov 19, 2018 14:48 UTC Westlake Chemical Partners LP WLKP · Entity 5149 PurchaseCommon Units (Limited Partner Interests) 2,492 $23.20 $57,819.38
Disclosure

SEC source: 0001567619-18-006578 · doc1.xml · nonDerivative · entry 1

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 73,597

F1 · price: The price reported in Column 4 is a weighted average price. These common units were purchased in multiple transactions ranging from $23.00 to $23.39, inclusive. The reporting person undertakes to provide to Westlake Chemical Partners LP, any security holder of Westlake Chemical Partners LP or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of common units purchased at each separate price within the ranges set forth in this footnote.

Read SEC document
November 14, 2018 Filed Nov 15, 2018 12:53 UTC Westlake Chemical Partners LP WLKP · Entity 5149 PurchaseCommon Units (Limited Partner Interests) 11,385 $23.37 $266,056.07
Disclosure

SEC source: 0001567619-18-006410 · doc1.xml · nonDerivative · entry 2

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 71,105

F2 · price: The price reported in Column 4 is a weighted average price. These common units were purchased in multiple transactions ranging from $23.21 to $23.47, inclusive. The reporting person undertakes to provide to Westlake Chemical Partners LP, any security holder of Westlake Chemical Partners LP or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of common units purchased at each separate price within the ranges set forth in this footnote.

Read SEC document
November 14, 2018 Filed Nov 16, 2018 18:06 UTC WESTLAKE CORP WLK · Entity 3555 Exercise / conversionEmployee Option (right to buy) · Derivative 30,639 $0.00 Strike: $7.12 $0.00
Disclosure

SEC source: 0001567619-18-006512 · doc1.xml · derivative · entry 10

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 61,280

Underlying: Common Stock · 30,639 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.

F7 · derivative.exercise_date: The stock options are excercisable in three equal installments on February 13, 2009, 2010 and 2011.

Read SEC document
November 14, 2018 Filed Nov 16, 2018 18:06 UTC WESTLAKE CORP WLK · Entity 3555 SaleCommon stock 900 $72.50 $65,250.00
Disclosure

SEC source: 0001567619-18-006512 · doc1.xml · nonDerivative · entry 4

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 312,392

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $72.38 to $72.64, 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 14, 2018 Filed Nov 16, 2018 18:06 UTC WESTLAKE CORP WLK · Entity 3555 SaleCommon stock 13,202 $71.77 $947,494.34
Disclosure

SEC source: 0001567619-18-006512 · doc1.xml · nonDerivative · entry 3

Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 313,292

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $71.37 to $72.37, 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

Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.