Welcome to our dedicated page for Westlake Chem Partners Lp SEC filings (Ticker: WLKP), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
Westlake Chemical Partners LP filings document regulatory disclosures for a NYSE-listed limited partnership with common units representing limited partner interests. Recent Form 8-K reports furnish operating results, Regulation FD materials, earnings-release exhibits, and distribution-related financial measures for the partnership’s interest in Westlake Chemical OpCo LP.
The filing record also covers material definitive agreements involving the Ethylene Sales Agreement, Feedstock Supply Agreement, Services and Secondment Agreement, and Omnibus Agreement. Governance disclosures address the general partner, board and officer changes, registered securities, exhibits, and Inline XBRL cover-page data.
Westlake Chemical Partners LP renewed its Ethylene Sales Agreement and Feedstock Supply Agreement with Westlake Corporation, extending them through December 31, 2027. The contracts include an initial term through December 31, 2026 and automatic 12‑month renewals, with termination permitted at the end of the initial or any renewal term on not less than 12 months’ notice.
Related amendments align the Services and Secondment Agreement’s term with the ethylene contract and provide that the Omnibus Agreement will terminate upon termination of the Ethylene Sales Agreement. The Omnibus amendment also addresses procedural requirements tied to Westlake’s indemnity obligations, including environmental and tax matters. The partnership furnished a Q3 2025 results press release and separate materials discussing the renewal.
Jean-Marc Gilson, President and CEO and a director of Westlake Chemical Partners LP (WLKP), reported an open-market purchase of 11,803.485 common units on 08/27/2025 at a price of $21.25 per unit, increasing his beneficial ownership to 11,803.485 units. The Form 4 was signed by proxy (J. Feng) on 08/29/2025. The filing identifies the reporting person as both an officer (President and CEO) and a director and indicates the form was filed by one reporting person.
Westlake Chemical Partners LP (WLKP) insider purchases reported by Jean-Marc Gilson, President and CEO and director. The filing documents multiple open-market acquisitions of common units executed between 11/27/2024 and 08/21/2025, increasing the reporting person’s beneficial ownership from 4,331.96 units to 11,708.195 units. Transaction prices range roughly from $21.81 to $24.75 per unit; some later entries note weighted-average prices from multiple trades. An explanatory note states certain earlier purchases were inadvertently omitted and have been reconciled. No derivative transactions are reported.
Jean-Marc Gilson, President, CEO and Director of Westlake Chemical Partners LP (WLKP), amended a prior Form 4 to disclose an additional insider purchase. The amendment reports that 320 common units were purchased on 08/28/2024 at a price of $22.95 per unit, bringing the reporting persons beneficial ownership to 3,427 common units. The amendment states the 320 units were inadvertently omitted from the original Form 4 filed for the same date.
The Form 4/A is signed by a power of attorney on 08/28/2025 and clarifies that this filing supplements, rather than replaces, the original disclosure.
Westlake Chemical Partners LP (WLKP) filing a Form 144 notifies the proposed sale of 12,000 common shares through UBS Financial Services (Weehawken, NJ) with an approximate aggregate market value of $263,400. The shares represent part of the issuer's outstanding common of 35,238,556 and the sale is scheduled for 08/15/2025 on the NYSE. The shares were originally acquired in an IPO purchase on 07/30/2014 and paid in cash. The filer declares no sales in the past three months and signs the required representation regarding material nonpublic information.
Energy Income Partners, LLC and four named partners reported beneficial ownership of limited partner units in Westlake Chemical Partners LP’s common unit class. The group holds an aggregate 1,774,544 units, representing 5.04% of the class, with 403,727 units held with sole voting and dispositive power and 1,370,817 units held with shared voting and dispositive power. The filing is a Schedule 13G and includes a certification that the securities are held in the ordinary course of business and were not acquired to change or influence control of the issuer.
Westlake Chemical Partners LP (WLKP) – Form 4 insider transaction
Director Randy Woelfel reported a matched exercise-and-sale on 8 Aug 2025 covering 4,882 common units:
- Exercise (Code M): 4,882 phantom units converted into an equal number of common units on 7 Aug 2025.
- Sale (Code D): the same 4,882 common units immediately sold at $21.96, generating proceeds of roughly $107 k.
After the transactions, Woelfel’s direct ownership fell from 28,795 to 23,913 common units (≈17% reduction) and no derivative (phantom) units remain outstanding. He also received a separate grant of 5,005 new phantom units on 6 Aug 2025 that will settle in common units one year later.
No 10b5-1 trading plan was indicated, and the filing involves only one reporting person. While the dollar value is modest relative to WLKP’s market capitalization, insider sales can be viewed cautiously by investors, particularly when they reduce ownership levels.
Westlake Chemical Partners LP (WLKP) filed a Form 4 reporting insider activity by director Lisa A. Friel. On 08-06-2025 she received 5,005 phantom units, each economically equivalent to a common unit. On 08-07-2025 she exercised 4,882 of those phantom units into common units (Code M) and sold 2,441 units at $21.96 (Code D). After the transactions she directly owns 7,163 common units.
- Approximate gross value: ~US$107 k (exercise) with ~US$53 k in sale proceeds.
- No phantom units remain; all derivative positions were converted or settled.
- Friel remains a director of the GP, maintaining equity alignment with unitholders.
Director G. Steven Finley filed a Form 4 for Westlake Chemical Partners LP (WLKP) covering two transactions on 8-6-25 and 8-7-25.
- 8 Aug 2025 grant: Finley received 5,005 phantom units (economic equivalent of common units). These vest/exercisable 8-6-26 and expire 9-6-26; cost basis reported as $0.
- 7 Aug 2025 conversion: Finley exercised 4,882 phantom units (Code M), acquiring the same number of WLKP common units at no cash cost. Direct common-unit holdings rose to 31,930 units from approximately 27,048, an ~18% increase.
No open-market purchases or sales were reported, and derivative holdings after the reported transactions stand at the newly granted 5,005 phantom units. The filing signals continued equity alignment by a board member but does not involve cash transactions or changes to public float.