Reported relationships
Latest disclosed role at each company.
| Company | Last reported as | Report date | Published |
|---|---|---|---|
| WESTLAKE CORPWLK · Entity 3555 | Director · Executive Chairman | August 11, 2026 | August 11, 2026 |
| Westlake Chemical Partners LPWLKP · Entity 5149 | Director · President & CEO · 10% owner | March 24, 2020 | March 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 / award | Ownership account | Disclosed shares / units | Disclosure context |
|---|---|---|---|
| Common StockSEC Table I · non-derivative | Direct | 642,880 |
Ending reported balance
After 2026-08-11 transaction · row 3
3 source rows · reconciled sequenceRow 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 2027-02-17 | Direct | 38,873 |
Reported balance
After 2026-08-11 transaction · row 4
Instrument identity requires review; Table II rows are not merged.
1 source rowRow 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 / award | Ownership account | Disclosed shares / units | Disclosure context |
|---|---|---|---|
| Common Units (Limited Partner Interests)SEC Table I · non-derivative | Direct | 166,435 |
Ending reported balance
After 2020-03-24 transaction · row 2
2 source rows · reconciled sequenceRow 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-derivative | Indirectby Trusts | 27,275 |
Reported balance
Holding disclosure · report date 2020-03-24 · row 3
Holding and transaction disclosures are not merged.
1 source rowRow 3 · Balance 27,275 |
| Common Units (Limited Partner Interests)SEC Table I · non-derivative | IndirectTTWF LP & TTWFGP LLC | 14,122,230 |
Reported balance
Holding disclosure · report date 2020-03-24 · row 4
Holding and transaction disclosures are not merged.
1 source rowRow 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 APIPurchases/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 | Company | Activity / security | Shares / units | Reported price | Reported value | Details |
|---|---|---|---|---|---|---|
| February 23, 2017 Filed Feb 28, 2017 21:32 UTC | WESTLAKE CORP WLK · Entity 3555 | Exercise / conversionCommon Stock | 42,180 | $15.81 | $666,654.90 |
DisclosureSEC source: 0001140361-17-009660 · doc1.xml · nonDerivative · entry 1 Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 316,198 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 17, 2017 Filed Feb 22, 2017 21:12 UTC | WESTLAKE CORP WLK · Entity 3555 | GrantRestricted Stock Units · Derivative | 19,902 | $0.00 | $0.00 |
DisclosureSEC source: 0001140361-17-008572 · doc1.xml · derivative · entry 2 Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 19,902 Underlying: Common Stock · 19,902 shares Expires not disclosed F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Westlake Chemical Corporation common stock. F3 · derivative.exercise_date: The restricted stock units will vest 3 years from the date of grant (February 17, 2020). F3 · derivative.expiration_date: The restricted stock units will vest 3 years from the date of grant (February 17, 2020). Read SEC document |
| February 17, 2017 Filed Feb 22, 2017 21:12 UTC | WESTLAKE CORP WLK · Entity 3555 | GrantEmployee Option (right to buy) · Derivative | 77,746 | $0.00 Strike: $61.87 | $0.00 |
DisclosureSEC source: 0001140361-17-008572 · doc1.xml · derivative · entry 1 Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 77,746 Underlying: Common Stock · 77,746 shares Expires 2027-02-17 F1 · derivative.exercise_date: The stock options are exercisable in three installments of 33%, 33% and 34% on February 17, 2018, 2019 and 2020, respectively. Read SEC document |
| February 15, 2017 Filed Feb 16, 2017 21:12 UTC | WESTLAKE CORP WLK · Entity 3555 | Tax withholdingCommon Stock | 3,522 | $64.01 | $225,443.22 |
DisclosureSEC source: 0001140361-17-007936 · 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 Read SEC document |
| February 14, 2017 Filed Feb 16, 2017 21:12 UTC | WESTLAKE CORP WLK · Entity 3555 | Exercise / conversionRestricted Stock Units · Derivative | 12,838 | $0.00 | $0.00 |
DisclosureSEC source: 0001140361-17-007936 · doc1.xml · derivative · entry 4 Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 0 Underlying: Common Stock · 12,838 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 common stock on a one-for-one basis. F2 · derivative.exercise_date: On February 14, 2014, the reporting person was granted 12,838 restricted stock units vesting on the third anniversary of the grant date. F2 · derivative.expiration_date: On February 14, 2014, the reporting person was granted 12,838 restricted stock units vesting on the third anniversary of the grant date. Read SEC document |
| February 14, 2017 Filed Feb 16, 2017 21:12 UTC | WESTLAKE CORP WLK · Entity 3555 | Exercise / conversionCommon Stock | 12,838 | Not disclosed | Not disclosed |
DisclosureSEC source: 0001140361-17-007936 · doc1.xml · nonDerivative · entry 1 Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 277,540 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 common stock on a one-for-one basis. Read SEC document |
| November 17, 2016 Filed Nov 18, 2016 21:33 UTC | WESTLAKE CORP WLK · Entity 3555 | SaleCommon Stock | 300 | $54.57 | $16,371.00 |
DisclosureSEC source: 0001140361-16-087264 · doc1.xml · nonDerivative · entry 3 Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By Mother's Estate Disclosed balance after: 0 F3 · 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 17, 2016 for ease of reporting. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $54.53 to 54.59, 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 (3) to this Form 4. F4 · ownership.nature: The person reporting disclaims beneficial ownership of these securities, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose. Read SEC document |
| November 17, 2016 Filed Nov 18, 2016 21:33 UTC | WESTLAKE CORP WLK · Entity 3555 | SaleCommon Stock | 9,700 | $53.82 | $522,093.77 |
DisclosureSEC source: 0001140361-16-087264 · doc1.xml · nonDerivative · entry 2 Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By Mother's Estate Disclosed balance after: 300 F2 · 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 17, 2016 for ease of reporting. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $53.48 to 54.47, 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 (2) to this Form 4. F4 · ownership.nature: The person reporting disclaims beneficial ownership of these securities, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose. Read SEC document |
| November 16, 2016 Filed Nov 18, 2016 21:33 UTC | WESTLAKE CORP WLK · Entity 3555 | SaleCommon Stock | 10,000 | $54.45 | $544,451.00 |
DisclosureSEC source: 0001140361-16-087264 · doc1.xml · nonDerivative · entry 1 Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By Mother's Estate Disclosed balance after: 10,000 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 16, 2016 for ease of reporting. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $54.15 to 54.90, 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 (1) to this Form 4. F4 · ownership.nature: The person reporting disclaims beneficial ownership of these securities, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose. Read SEC document |
| November 15, 2016 Filed Nov 16, 2016 21:12 UTC | WESTLAKE CORP WLK · Entity 3555 | SaleCommon Stock | 10,000 | $53.06 | $530,595.00 |
DisclosureSEC source: 0001140361-16-086951 · doc1.xml · nonDerivative · entry 2 Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By Mother's Estate Disclosed balance after: 20,000 F2 · 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 15, 2016 for ease of reporting. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $52.72 to 53.63, 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 (2) to this Form 4. F3 · ownership.nature: The person reporting disclaims beneficial ownership of these securities, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose. Read SEC document |
| November 14, 2016 Filed Nov 16, 2016 21:12 UTC | WESTLAKE CORP WLK · Entity 3555 | SaleCommon Stock | 10,000 | $52.84 | $528,439.00 |
DisclosureSEC source: 0001140361-16-086951 · doc1.xml · nonDerivative · entry 1 Chao Albert · CIK 0001299403 · Director · President & CEO · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By Mother's Estate Disclosed balance after: 30,000 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, 2016 for ease of reporting. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $52.63 to 53.11, 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. F3 · ownership.nature: The person reporting disclaims beneficial ownership of these securities, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose. 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.