Here are the 10-K annual reports from WESTLAKE CHEMICAL PARTNERS LP (WLKP) in our archive since June 2025, newest first, and each one links through to the document itself with the summary and the scores our analysis gives it.
A 10-K covers the audited annual report, with the full financial statements, so if you follow WLKP and want that one kind of document rather than the whole filing history, this is the page to keep. The company's other filings, of every form, are on the full WLKP filings page.
Westlake Chemical Partners files its annual report describing an ethylene-focused partnership structure closely tied to Westlake Corporation. The partnership owns a 22.8% limited partner interest and the general partner of OpCo, whose three U.S. ethylene plants and a 200‑mile pipeline provide about 3.7 billion pounds of annual capacity.
Westlake buys at least 95% of OpCo’s planned ethylene output under a cost‑plus Ethylene Sales Agreement that includes a fixed $0.10‑per‑pound margin and now runs through December 31, 2027, alongside a renewed Feedstock Supply Agreement. This dependence concentrates credit and contract-renewal risk.
The report highlights environmental and climate regulations, potential capital needs for compliance, cybersecurity threats, variable-rate debt exposure, and the conflict-prone governance structure where Westlake controls the general partner. As of December 31, 2025, non‑affiliate common units had an aggregate market value of about $425.6 million, with 35,245,879 common units outstanding as of February 25, 2026.