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Westlake Corp SEC Filings
What Westlake Corp has told the SEC happened, by the 8-K items and forms it filed under: when it reported results, who joined or left, what it bought or sold, and whether its auditor or its accounts ever changed.
WLK overview →Filings on file
131
since Nov 8, 2016
Warning signs
0
none filed
Last results
Aug 4, 2026
8-K item 2.02
Industry
Industrial Organic Chemicals
SIC 2860
Newest first
Each label is a form type or an 8-K item as filed; each row links to the filing.
| Filed | What it reports | Document |
|---|---|---|
| Sep 29, 2026 | Restructuring 8-K | Read ↗ |
| Aug 31, 2026 | Executive or director change 8-K | Read ↗ |
| Aug 5, 2026 | Quarterly report 10-Q | Read ↗ |
| Aug 4, 2026 | Results announced 8-K | Read ↗ |
| May 18, 2026 | Shareholder vote 8-K | Read ↗ |
| May 6, 2026 | Quarterly report 10-Q | Read ↗ |
| May 5, 2026 | Results announced 8-K | Read ↗ |
| Apr 20, 2026 | Executive or director change 8-K | Read ↗ |
| Apr 6, 2026 | Material agreementNew debt 8-K | Read ↗ |
| Apr 2, 2026 | Executive or director change 8-K | Read ↗ |
| Feb 26, 2026 | Annual report 10-K | Read ↗ |
| Feb 24, 2026 | Results announced 8-K | Read ↗ |
| Feb 23, 2026 | Executive or director change 8-K | Read ↗ |
| Dec 15, 2025 | Restructuring 8-K | Read ↗ |
| Nov 5, 2025 | Material agreement 8-K | Read ↗ |
| Oct 31, 2025 | Quarterly report 10-Q | Read ↗ |
| Oct 30, 2025 | Results announced 8-K | Read ↗ |
| Aug 6, 2025 | Quarterly report 10-Q | Read ↗ |
| Aug 5, 2025 | Results announced 8-K | Read ↗ |
| Jun 17, 2025 | Restructuring 8-K | Read ↗ |
| May 12, 2025 | Shareholder vote 8-K | Read ↗ |
| May 2, 2025 | Quarterly report 10-Q | Read ↗ |
| May 2, 2025 | Results announced 8-K | Read ↗ |
| Apr 16, 2025 | Executive or director change 8-K | Read ↗ |
| Mar 4, 2025 | Executive or director change 8-K | Read ↗ |
| Feb 25, 2025 | Annual report 10-K | Read ↗ |
| Feb 24, 2025 | Results announced 8-K | Read ↗ |
| Dec 11, 2024 | Executive or director change 8-K | Read ↗ |
| Nov 6, 2024 | Quarterly report 10-Q | Read ↗ |
| Nov 5, 2024 | Results announced 8-K | Read ↗ |
| Aug 12, 2024 | Executive or director change 8-K | Read ↗ |
| Aug 9, 2024 | Quarterly report 10-Q | Read ↗ |
| Aug 6, 2024 | Results announced 8-K | Read ↗ |
| Jul 29, 2024 | Restructuring 8-K | Read ↗ |
| Jul 15, 2024 | Executive or director change 8-K | Read ↗ |
| May 29, 2024 | Executive or director change 8-K | Read ↗ |
| May 13, 2024 | Shareholder vote 8-K | Read ↗ |
| May 2, 2024 | Quarterly report 10-Q | Read ↗ |
| May 1, 2024 | Results announced 8-K | Read ↗ |
| Apr 25, 2024 | Executive or director change 8-K | Read ↗ |
| Feb 22, 2024 | Annual report 10-K | Read ↗ |
| Feb 20, 2024 | Results announced 8-K | Read ↗ |
| Feb 6, 2024 | Results announced 8-K | Read ↗ |
| Nov 2, 2023 | Quarterly report 10-Q | Read ↗ |
| Nov 2, 2023 | Results announced 8-K | Read ↗ |
| Aug 3, 2023 | Quarterly report 10-Q | Read ↗ |
| Aug 3, 2023 | Results announced 8-K | Read ↗ |
| May 16, 2023 | Executive or director changeShareholder vote 8-K | Read ↗ |
| May 4, 2023 | Quarterly report 10-Q | Read ↗ |
| May 4, 2023 | Results announced 8-K | Read ↗ |
| Apr 5, 2023 | Executive or director change 8-K | Read ↗ |
| Feb 22, 2023 | Annual report 10-K | Read ↗ |
| Feb 21, 2023 | Executive or director change 8-K | Read ↗ |
| Feb 21, 2023 | Results announced 8-K | Read ↗ |
| Nov 3, 2022 | Quarterly report 10-Q | Read ↗ |
| Nov 3, 2022 | Results announced 8-K | Read ↗ |
| Aug 3, 2022 | Quarterly report 10-Q | Read ↗ |
| Aug 2, 2022 | Results announced 8-K | Read ↗ |
| Jun 9, 2022 | Material agreementNew debt 8-K | Read ↗ |
| May 13, 2022 | Shareholder vote 8-K | Read ↗ |
| May 4, 2022 | Quarterly report 10-Q | Read ↗ |
| May 3, 2022 | Results announced 8-K | Read ↗ |
| Feb 23, 2022 | Annual report 10-K | Read ↗ |
| Feb 22, 2022 | Results announced 8-K | Read ↗ |
| Feb 1, 2022 | Acquisition or sale completed 8-K | Read ↗ |
| Nov 24, 2021 | Material agreement 8-K | Read ↗ |
| Nov 3, 2021 | Quarterly report 10-Q | Read ↗ |
| Nov 2, 2021 | Results announced 8-K | Read ↗ |
| Oct 1, 2021 | Acquisition or sale completed 8-K | Read ↗ |
| Aug 19, 2021 | Material agreementNew debt 8-K | Read ↗ |
| Aug 6, 2021 | Material agreement 8-K | Read ↗ |
| Aug 3, 2021 | Quarterly report 10-Q | Read ↗ |
| Aug 3, 2021 | Results announced 8-K | Read ↗ |
| Jun 21, 2021 | Material agreement 8-K | Read ↗ |
| May 17, 2021 | Shareholder vote 8-K | Read ↗ |
| May 5, 2021 | Quarterly report 10-Q | Read ↗ |
| May 4, 2021 | Results announced 8-K | Read ↗ |
| Feb 24, 2021 | Annual report 10-K | Read ↗ |
| Feb 23, 2021 | Results announced 8-K | Read ↗ |
| Nov 18, 2020 | Executive or director change 8-K | Read ↗ |
| Nov 4, 2020 | Quarterly report 10-Q | Read ↗ |
| Nov 3, 2020 | Results announced 8-K | Read ↗ |
| Aug 6, 2020 | Quarterly report 10-Q | Read ↗ |
| Aug 6, 2020 | Results announced 8-K | Read ↗ |
| Jun 12, 2020 | Material agreementNew debt 8-K | Read ↗ |
| Jun 10, 2020 | Material agreement 8-K | Read ↗ |
| May 18, 2020 | Shareholder vote 8-K | Read ↗ |
| May 6, 2020 | Quarterly report 10-Q | Read ↗ |
| May 4, 2020 | Results announced 8-K | Read ↗ |
| Feb 19, 2020 | Annual report 10-K | Read ↗ |
| Feb 18, 2020 | Executive or director change 8-K | Read ↗ |
| Feb 18, 2020 | Results announced 8-K | Read ↗ |
| Jan 31, 2020 | Executive or director change 8-K | Read ↗ |
| Nov 6, 2019 | Quarterly report 10-Q | Read ↗ |
| Nov 5, 2019 | Results announced 8-K | Read ↗ |
| Aug 6, 2019 | Quarterly report 10-Q | Read ↗ |
| Aug 6, 2019 | Results announced 8-K | Read ↗ |
| Jul 17, 2019 | Material agreementNew debt 8-K | Read ↗ |
| Jul 11, 2019 | Material agreement 8-K | Read ↗ |
| Jul 1, 2019 | Results announced 8-K | Read ↗ |
| May 21, 2019 | Shareholder vote 8-K | Read ↗ |
| May 2, 2019 | Quarterly report 10-Q | Read ↗ |
| May 2, 2019 | Results announced 8-K | Read ↗ |
| Feb 20, 2019 | Annual report 10-K | Read ↗ |
| Feb 19, 2019 | Results announced 8-K | Read ↗ |
| Nov 6, 2018 | Quarterly report 10-Q | Read ↗ |
| Nov 6, 2018 | Results announced 8-K | Read ↗ |
| Aug 17, 2018 | Executive or director change 8-K | Read ↗ |
| Aug 2, 2018 | Quarterly report 10-Q | Read ↗ |
| Aug 2, 2018 | Results announced 8-K | Read ↗ |
| Jul 26, 2018 | Material agreementNew debt 8-K | Read ↗ |
| May 21, 2018 | Shareholder vote 8-K | Read ↗ |
| May 3, 2018 | Quarterly report 10-Q | Read ↗ |
| May 3, 2018 | Results announced 8-K | Read ↗ |
| Feb 21, 2018 | Annual report 10-K | Read ↗ |
| Feb 20, 2018 | Results announced 8-K | Read ↗ |
| Jan 8, 2018 | Executive or director change 8-K | Read ↗ |
| Nov 28, 2017 | Material agreementNew debt 8-K | Read ↗ |
| Nov 14, 2017 | Material agreement 8-K | Read ↗ |
| Nov 7, 2017 | Quarterly report 10-Q | Read ↗ |
| Nov 7, 2017 | Results announced 8-K | Read ↗ |
| Aug 3, 2017 | Quarterly report 10-Q | Read ↗ |
| Aug 3, 2017 | Results announced 8-K | Read ↗ |
| May 19, 2017 | Executive or director changeShareholder vote 8-K | Read ↗ |
| May 3, 2017 | Quarterly report 10-Q | Read ↗ |
| May 2, 2017 | Results announced 8-K | Read ↗ |
| Mar 13, 2017 | Merger vote or registration S-4 | Read ↗ |
| Feb 22, 2017 | Annual report 10-K | Read ↗ |
| Feb 21, 2017 | Results announced 8-K | Read ↗ |
| Nov 9, 2016 | Quarterly report 10-Q | Read ↗ |
| Nov 8, 2016 | Results announced 8-K | Read ↗ |
Source: Westlake Corp's EDGAR filing history, the last ten years. The labels are the form types and 8-K item numbers the company filed under, not a reading of what it wrote — an item 5.02 can be a chief executive fired or a director retiring on schedule — so each row links to the filing.
More on WLK
Company overviewEverything on WLK in one place, with the price.Insider tradingWhat WLK's own officers and directors buy and sell.Who owns itEvery manager reporting a position in WLK.Funds holding itWhich funds and ETFs hold WLK, and how big a bet.LobbyingWhat WLK spends lobbying Congress, and on what.Who lobbies for itThe lobbyists on WLK's account, and who they worked for.Federal contractsWhat federal agencies pay WLK.PatentsWhat WLK is filing at the patent office.Workplace safetyWhat OSHA found at WLK's sites.