SEC Filings for Westlake Chemical Partners LP (WLKP)

Last updated: 2026-03-12 13:06 UTC | Total filings: 402

Browse the latest SEC filings and forms submitted by Westlake Chemical Partners LP (WLKP). Access annual reports, quarterly statements, and other official disclosures.

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Form Filing Date Description Link
EFFECT March 11, 2026 - View Document
10-K March 4, 2026 10-K View Document
S-3 March 4, 2026 S-3 View Document
8-K Feb. 24, 2026 8-K View Document
8-K Feb. 23, 2026 8-K View Document
SCHEDULE 13G Feb. 17, 2026 - View Document
10-Q Oct. 31, 2025 10-Q View Document
8-K Oct. 30, 2025 8-K View Document
4 Aug. 29, 2025 4 View Document
4 Aug. 28, 2025 4 View Document
4/A Aug. 28, 2025 4/A View Document
144 Aug. 15, 2025 - View Document
SCHEDULE 13G Aug. 14, 2025 - View Document
4 Aug. 8, 2025 4 View Document
4 Aug. 8, 2025 4 View Document
4 Aug. 8, 2025 4 View Document
3 Aug. 7, 2025 3 View Document
10-Q Aug. 6, 2025 10-Q View Document
8-K Aug. 5, 2025 8-K View Document
4 May 30, 2025 4 View Document
4 May 29, 2025 4 View Document
144 May 27, 2025 - View Document
SCHEDULE 13G/A May 15, 2025 - View Document
10-Q May 2, 2025 10-Q View Document
8-K May 2, 2025 8-K View Document
10-K March 5, 2025 10-K View Document
8-K Feb. 24, 2025 8-K View Document
10-Q Nov. 6, 2024 10-Q View Document
8-K Nov. 5, 2024 8-K View Document
4 Sept. 3, 2024 4 View Document
4 Aug. 28, 2024 4 View Document
4 Aug. 26, 2024 4 View Document
4 Aug. 14, 2024 4 View Document
4 Aug. 12, 2024 4 View Document
4 Aug. 12, 2024 4 View Document
4 Aug. 12, 2024 4 View Document
4 Aug. 12, 2024 4 View Document
10-Q Aug. 9, 2024 10-Q View Document
4 Aug. 8, 2024 4 View Document
4 Aug. 8, 2024 4 View Document
4 Aug. 8, 2024 4 View Document
8-K Aug. 6, 2024 8-K View Document
3 July 15, 2024 3 View Document
8-K July 15, 2024 8-K View Document
4 June 3, 2024 4 View Document
4 May 14, 2024 4 View Document
4 May 13, 2024 4 View Document
S-8 POS May 10, 2024 S-8 POS View Document
4 May 10, 2024 4 View Document
3 May 9, 2024 3 View Document
8-K May 8, 2024 8-K View Document
10-Q May 2, 2024 10-Q View Document
8-K May 1, 2024 8-K View Document
4 April 1, 2024 4 View Document
4 March 25, 2024 4 View Document
DEFA14A March 18, 2024 DEFA14A View Document
DEF 14A March 18, 2024 DEFINITIVE PROXY STATEMENTS View Document
4 March 7, 2024 4 View Document
10-K Feb. 28, 2024 10-K View Document
4 Feb. 26, 2024 4 View Document
8-K Feb. 20, 2024 8-K View Document
SC 13G/A Feb. 14, 2024 SC 13G/A View Document
SC 13D/A Feb. 14, 2024 - View Document
SC 13G/A Feb. 12, 2024 SEC SCHEDULE 13G View Document
SC 13G/A Feb. 7, 2024 AMENDED SCHEDULE 13G View Document
4 Nov. 13, 2023 FORM 4 SUBMISSION View Document
4 Nov. 8, 2023 FORM 4 SUBMISSION View Document
10-Q Nov. 2, 2023 10-Q View Document
8-K Nov. 2, 2023 8-K View Document
4 Aug. 31, 2023 FORM 4 SUBMISSION View Document
4 Aug. 24, 2023 FORM 4 SUBMISSION View Document
4 Aug. 23, 2023 FORM 4 SUBMISSION View Document
4 Aug. 21, 2023 FORM 4 SUBMISSION View Document
4 Aug. 16, 2023 FORM 4 SUBMISSION View Document
4 Aug. 11, 2023 FORM 4 SUBMISSION View Document
4 Aug. 11, 2023 FORM 4 SUBMISSION View Document
4 Aug. 11, 2023 FORM 4 SUBMISSION View Document
4 Aug. 11, 2023 FORM 4 SUBMISSION View Document
4 Aug. 9, 2023 FORM 4 SUBMISSION View Document
10-Q Aug. 3, 2023 10-Q View Document
8-K Aug. 3, 2023 8-K View Document
4 May 11, 2023 FORM 4 SUBMISSION View Document
10-Q May 4, 2023 10-Q View Document
8-K May 4, 2023 8-K View Document
3 April 28, 2023 FORM 3 SUBMISSION View Document
8-K April 27, 2023 8-K View Document
EFFECT March 20, 2023 - View Document
CORRESP March 16, 2023 - View Document
4 March 14, 2023 FORM 4 View Document
4 March 13, 2023 FORM 4 View Document
UPLOAD March 8, 2023 - View Document
8-K March 7, 2023 8-K View Document
S-3 March 1, 2023 S-3 View Document
10-K March 1, 2023 10-K View Document
8-K Feb. 21, 2023 8-K View Document
SC 13G/A Feb. 14, 2023 SC 13G/A View Document
SC 13G/A Feb. 10, 2023 SEC SCHEDULE 13G View Document
SC 13G/A Jan. 23, 2023 NONE View Document
SC 13G/A Jan. 11, 2023 AMENDED SCHEDULE 13G View Document
4 Nov. 16, 2022 FORM 4 View Document
4 Nov. 14, 2022 FORM 4 View Document
10-Q Nov. 3, 2022 10-Q View Document
8-K Nov. 3, 2022 8-K View Document
4 Aug. 12, 2022 FORM 4 View Document
4 Aug. 12, 2022 FORM 4 View Document
4 Aug. 12, 2022 FORM 4 View Document
10-Q Aug. 3, 2022 10-Q View Document
8-K Aug. 2, 2022 8-K View Document
8-K July 15, 2022 8-K View Document
4 June 13, 2022 FORM 4 View Document
4 June 2, 2022 FORM 4 View Document
144 May 31, 2022 FORM 144 View Document
10-Q May 4, 2022 10-Q View Document
8-K May 3, 2022 8-K View Document
4 March 9, 2022 FORM 4 View Document
4 March 8, 2022 FORM 4 View Document
3 March 2, 2022 FORM 3 View Document
10-K March 2, 2022 10-K View Document
8-K Feb. 22, 2022 8-K View Document
SC 13G/A Feb. 14, 2022 SC 13G/A View Document
SC 13G/A Feb. 11, 2022 SEC SCHEDULE 13G View Document
SC 13G/A Jan. 28, 2022 AMENDED SCHEDULE 13G View Document
SC 13G/A Jan. 21, 2022 NONE View Document
10-Q Nov. 3, 2021 10-Q View Document
8-K Nov. 2, 2021 8-K View Document
4 Aug. 13, 2021 FORM 4 View Document
4 Aug. 13, 2021 FORM 4 View Document
4 Aug. 13, 2021 FORM 4 View Document
10-Q Aug. 4, 2021 10-Q View Document
8-K Aug. 3, 2021 8-K View Document
4 May 14, 2021 FORM 4 View Document
10-Q May 5, 2021 10-Q View Document
8-K May 4, 2021 8-K View Document
4 March 8, 2021 FORM 4 View Document
10-K March 2, 2021 10-K View Document
8-K Feb. 23, 2021 8-K View Document
SC 13G/A Feb. 16, 2021 SCHEDULE 13G/A View Document
SC 13G/A Feb. 16, 2021 SCHEDULE 13G/A View Document
SC 13G/A Feb. 12, 2021 SEC SCHEDULE 13G View Document
SC 13G/A Feb. 11, 2021 JANUS HENDERSON GROUP PLC OWNS 3.3% View Document
SC 13G/A Jan. 15, 2021 NONE View Document
SC 13G Jan. 11, 2021 SCHEDULE 13G View Document
3 Jan. 4, 2021 FORM 3 View Document
4 Nov. 16, 2020 FORM 4 View Document
4 Nov. 12, 2020 FORM 4 View Document
10-Q Nov. 4, 2020 10-Q View Document
8-K Nov. 3, 2020 8-K View Document
8-K Sept. 8, 2020 8-K View Document
8-K Aug. 28, 2020 8-K View Document
4 Aug. 17, 2020 FORM 4 View Document
4 Aug. 13, 2020 FORM 4 View Document
4 Aug. 13, 2020 FORM 4 View Document
4 Aug. 13, 2020 FORM 4 View Document
8-K Aug. 6, 2020 8-K View Document
10-Q Aug. 6, 2020 10-Q View Document
4 May 15, 2020 FORM 4 View Document
10-Q May 6, 2020 10-Q View Document
8-K May 4, 2020 8-K View Document
EFFECT April 16, 2020 - View Document
CORRESP April 14, 2020 - View Document
3 March 31, 2020 FORM 3 View Document
4 March 25, 2020 FORM 4 View Document
3 March 25, 2020 FORM 3 View Document
4 March 24, 2020 FORM 4 View Document
8-K March 24, 2020 8-K View Document
4 March 23, 2020 FORM 4 View Document
4 March 23, 2020 FORM 4 View Document
4 March 23, 2020 FORM 4 View Document
4 March 20, 2020 FORM 4 View Document
4 March 20, 2020 FORM 4 View Document
4 March 19, 2020 FORM 4 View Document
4 March 18, 2020 FORM 4 View Document
4 March 18, 2020 FORM 4 View Document
4 March 17, 2020 FORM 4 View Document
4 March 16, 2020 FORM 4 View Document
4 March 16, 2020 FORM 4 View Document
4 March 16, 2020 FORM 4 View Document
4 March 12, 2020 FORM 4 View Document
CORRESP March 4, 2020 - View Document
UPLOAD March 4, 2020 - View Document
CORRESP March 3, 2020 - View Document
S-3 Feb. 28, 2020 S-3 View Document
10-K Feb. 28, 2020 10-K View Document
8-K Feb. 18, 2020 8-K View Document
8-K Feb. 18, 2020 8-K View Document
SC 13G/A Feb. 14, 2020 JANUS HENDERSON GROUP PLC OWNS 5.4% OF WESTLAKE View Document
SC 13G Feb. 14, 2020 SCHEDULE 13G View Document
SC 13G/A Feb. 12, 2020 SEC SCHEDULE 13G View Document
8-K Jan. 31, 2020 8-K View Document
SC 13G/A Jan. 27, 2020 NONE View Document
4 Nov. 15, 2019 FORM 4 View Document
4 Nov. 14, 2019 FORM 4 View Document
3 Nov. 12, 2019 FORM 3 View Document
4 Nov. 12, 2019 FORM 4 View Document
8-K Nov. 8, 2019 FORM 8-K View Document
10-Q Nov. 6, 2019 10-Q View Document
8-K Nov. 5, 2019 8-K View Document
8-K Oct. 17, 2019 8-K View Document
4 Aug. 21, 2019 FORM 4 View Document
4 Aug. 21, 2019 FORM 4 View Document
4 Aug. 16, 2019 FORM 4 View Document
4 Aug. 16, 2019 FORM 4 View Document
4 Aug. 16, 2019 FORM 4 View Document
8-K Aug. 6, 2019 8-K View Document
10-Q Aug. 6, 2019 10-Q View Document
SC 13G June 10, 2019 SEC SCHEDULE 13G View Document
8-K May 2, 2019 8-K View Document
10-Q May 2, 2019 10-Q View Document
EFFECT April 12, 2019 - View Document
CORRESP April 10, 2019 - View Document
UPLOAD April 10, 2019 - View Document
SC 13D April 8, 2019 - View Document
4 April 1, 2019 FORM 4 View Document
S-3 March 29, 2019 FORM S-3 View Document
8-K March 29, 2019 8-K View Document
8-K March 27, 2019 FORM 8-K View Document
8-K/A March 27, 2019 8-K/A View Document
10-K March 1, 2019 10-K View Document
8-K Feb. 19, 2019 8-K View Document
SC 13G/A Feb. 14, 2019 AMENDMENT NO.1 TO SCHEDULE 13G View Document
SC 13G Feb. 13, 2019 JANUS HENDERSON GROUP PLC OWNS 5.5% OF WESTLAKE View Document
SC 13G/A Feb. 11, 2019 - View Document
SC 13G Feb. 6, 2019 - View Document
SC 13G/A Jan. 10, 2019 - View Document
4 Dec. 3, 2018 FORM 4 View Document
4 Nov. 26, 2018 FORM 4 View Document
4 Nov. 20, 2018 FORM 4 View Document
4 Nov. 19, 2018 FORM 4 View Document
4 Nov. 15, 2018 FORM 4 View Document
4 Nov. 14, 2018 FORM 4 View Document
4 Nov. 13, 2018 FORM 4 View Document
10-Q Nov. 6, 2018 10-Q View Document
8-K Nov. 6, 2018 8-K View Document
424B5 Oct. 5, 2018 424B5 View Document
8-K Oct. 5, 2018 8-K View Document
4 Aug. 20, 2018 FORM 4 View Document
4 Aug. 20, 2018 FORM 4 View Document
4 Aug. 20, 2018 FORM 4 View Document
4 Aug. 16, 2018 FORM 4 View Document
4 Aug. 16, 2018 FORM 4 View Document
4 Aug. 16, 2018 FORM 4 View Document
8-K Aug. 2, 2018 8-K View Document
10-Q Aug. 2, 2018 10-Q View Document
8-K July 30, 2018 FORM 8-K View Document
8-K May 3, 2018 8-K View Document
10-Q May 3, 2018 10-Q View Document
SC 13D/A April 3, 2018 SC 13D/A View Document
SC 13G April 3, 2018 SC 13G View Document
SC 13D/A March 23, 2018 SC 13D/A View Document
4 March 7, 2018 FORM 4 View Document
4 March 6, 2018 FORM 4 View Document
4 March 5, 2018 FORM 4 View Document
4 March 2, 2018 FORM 4 View Document
10-K March 1, 2018 10-K View Document
4 Feb. 27, 2018 FORM 4 View Document
8-K Feb. 20, 2018 8-K View Document
SC 13G/A Feb. 14, 2018 - View Document
SC 13G/A Feb. 14, 2018 SC 13G/A View Document
SC 13G/A Feb. 5, 2018 FORM SC 13G View Document
4 Jan. 30, 2018 FORM 4 View Document
SC 13G/A Jan. 26, 2018 SC 13G/A View Document
4 Dec. 5, 2017 FORM 4 View Document
4 Nov. 29, 2017 FORM 4 View Document
4/A Nov. 28, 2017 FORM 4/A View Document
4 Nov. 28, 2017 FORM 4 View Document
4 Nov. 27, 2017 FORM 4 View Document
8-K Nov. 16, 2017 FORM 8-K View Document
4 Nov. 16, 2017 FORM 4 View Document
8-K Nov. 7, 2017 8-K View Document
10-Q Nov. 7, 2017 10-Q View Document
3 Oct. 26, 2017 FORM 3 SUBMISSION View Document
SC 13D Oct. 26, 2017 SC 13D View Document
3 Oct. 26, 2017 FORM 3 SUBMISSION View Document
SC 13G/A Oct. 6, 2017 FORM SC 13G View Document
8-K Oct. 3, 2017 FORM 8-K View Document
8-K Sept. 28, 2017 8-K View Document
424B5 Sept. 28, 2017 424B5 View Document
424B5 Sept. 26, 2017 424B5 View Document
8-K Sept. 26, 2017 FORM 8-K View Document
4 Aug. 31, 2017 FORM 4 SUBMISSION View Document
4 Aug. 21, 2017 FORM 4 View Document
4 Aug. 18, 2017 FORM 4 View Document
4 Aug. 18, 2017 FORM 4 View Document
4 Aug. 18, 2017 FORM 4 View Document
8-K Aug. 3, 2017 8-K View Document
10-Q Aug. 3, 2017 10-Q View Document
10-Q May 3, 2017 10-Q View Document
8-K May 2, 2017 8-K View Document
SC 13G/A April 24, 2017 SC 13G/A View Document
EFFECT March 24, 2017 - View Document
CORRESP March 22, 2017 - View Document
UPLOAD March 21, 2017 - View Document
S-3 March 10, 2017 S-3 View Document
4 March 10, 2017 FORM 4 View Document
4 March 9, 2017 FORM 4 View Document
10-K March 7, 2017 10-K View Document
8-K Feb. 21, 2017 8-K View Document
SC 13G Feb. 14, 2017 SC 13G/A View Document
SC 13G/A Feb. 13, 2017 SC 13G AMENDMENT NO. 2 View Document
SC 13G/A Feb. 10, 2017 SC 13G/A View Document
SC 13G/A Jan. 25, 2017 SCHEDULE 13G View Document
8-K Jan. 24, 2017 FORM 8-K View Document
8-K Jan. 23, 2017 FORM 8-K View Document
8-K Jan. 20, 2017 FORM 8-K View Document
4 Dec. 2, 2016 FORM 4 View Document
UPLOAD Nov. 28, 2016 - View Document
CORRESP Nov. 23, 2016 - View Document
UPLOAD Nov. 18, 2016 - View Document
4 Nov. 17, 2016 FORM 4 View Document
10-Q Nov. 9, 2016 10-Q View Document
8-K Nov. 8, 2016 8-K View Document
3 Oct. 12, 2016 FORM 3 View Document
8-K Oct. 11, 2016 FORM 8-K View Document
4 Aug. 23, 2016 FORM 4 View Document
4 Aug. 23, 2016 FORM 4 View Document
10-Q Aug. 9, 2016 10-Q View Document
8-K July 28, 2016 8-K View Document
10-Q May 4, 2016 10-Q View Document
8-K May 3, 2016 8-K View Document
10-K March 8, 2016 10-K View Document
8-K Feb. 23, 2016 8-K View Document
SC 13G/A Feb. 16, 2016 SCHEDULE 13G/A View Document
SC 13G/A Feb. 16, 2016 NONE View Document
SC 13G/A Feb. 12, 2016 SC 13G AMENDMENT NO. 1 View Document
SC 13G/A Feb. 9, 2016 SCHEDULE 13G View Document
SC 13G/A Feb. 9, 2016 - View Document
SC 13G/A Feb. 5, 2016 SCHEDULE 13G/A View Document
SC 13G Jan. 7, 2016 SCHEDULE 13G View Document
10-Q Nov. 4, 2015 10-Q View Document
8-K Nov. 3, 2015 8-K View Document
4 Aug. 21, 2015 FORM 4 View Document
4 Aug. 21, 2015 FORM 4 View Document
4 Aug. 21, 2015 FORM 4 View Document
10-Q Aug. 5, 2015 10-Q View Document
8-K Aug. 4, 2015 8-K View Document
SC 13G May 21, 2015 SCHEDULE 13G View Document
10-Q May 6, 2015 10-Q View Document
8-K May 6, 2015 FORM 8-K View Document
8-K May 4, 2015 8-K View Document
8-K April 30, 2015 FORM 8-K View Document
10-K March 9, 2015 10-K View Document
8-K Feb. 24, 2015 8-K View Document
SC 13G Feb. 17, 2015 NONE View Document
SC 13G Feb. 13, 2015 SC 13G View Document
SC 13G Feb. 13, 2015 - View Document
4 Feb. 2, 2015 FORM 4 View Document
3 Feb. 2, 2015 FORM 3 View Document
8-K Jan. 29, 2015 8-K View Document
10-Q Nov. 7, 2014 10-Q View Document
8-K Nov. 4, 2014 8-K View Document
10-Q Sept. 8, 2014 10-Q View Document
4 Aug. 22, 2014 FORM 4 View Document
4 Aug. 22, 2014 FORM 4 View Document
S-8 Aug. 19, 2014 S-8 View Document
SC 13G Aug. 11, 2014 SCHEDULE 13G View Document
8-K Aug. 8, 2014 8-K View Document
4 Aug. 6, 2014 FORM 4 View Document
4 Aug. 6, 2014 FORM 4 View Document
4 Aug. 6, 2014 FORM 4 View Document
4 Aug. 6, 2014 FORM 4 View Document
4 Aug. 6, 2014 FORM 4 View Document
4 Aug. 6, 2014 FORM 4 View Document
4 Aug. 6, 2014 FORM 4 View Document
4 Aug. 6, 2014 FORM 4 View Document
4 Aug. 6, 2014 FORM 4 View Document
8-K Aug. 4, 2014 8-K View Document
CT ORDER Aug. 1, 2014 - View Document
424B1 July 31, 2014 424B1 View Document
3 July 29, 2014 FORM 3 View Document
S-1/A July 29, 2014 S-1/A View Document
3 July 29, 2014 FORM 3 View Document
3 July 29, 2014 FORM 3 View Document
3 July 29, 2014 FORM 3 View Document
3 July 29, 2014 FORM 3 View Document
3 July 29, 2014 FORM 3 View Document
3 July 29, 2014 FORM 3 View Document
3 July 29, 2014 FORM 3 View Document
3 July 29, 2014 FORM 3 View Document
3 July 29, 2014 FORM 3 View Document
3 July 29, 2014 FORM 3 View Document
EFFECT July 29, 2014 - View Document
3 July 29, 2014 FORM 3 View Document
CERTNYS July 28, 2014 AUTO-GENERATED PAPER DOCUMENT View Document
CORRESP July 25, 2014 - View Document
CORRESP July 25, 2014 - View Document
CORRESP July 25, 2014 - View Document
UPLOAD July 24, 2014 - View Document
8-A12B July 24, 2014 8-A12B View Document
CORRESP July 23, 2014 - View Document
CORRESP July 21, 2014 - View Document
S-1/A July 21, 2014 S-1/A View Document
UPLOAD July 18, 2014 - View Document
S-1/A July 15, 2014 S-1/A View Document
CORRESP July 15, 2014 - View Document
S-1/A July 9, 2014 S-1/A View Document
S-1/A June 30, 2014 FORM S-1/A View Document
CORRESP June 30, 2014 - View Document
UPLOAD June 20, 2014 - View Document
S-1/A June 6, 2014 FORM S-1/A View Document
CORRESP June 6, 2014 - View Document
UPLOAD May 22, 2014 - View Document
S-1 April 29, 2014 FORM S-1 View Document