Westlake Chemical Partners (WLKP) investor relations material

Company overview and business model

• Operates as a Delaware limited partnership focused on acquiring, developing, and operating ethylene production facilities and related assets.

• Generates revenue primarily through a 22.8% limited partner interest in OpCo, which owns ethylene production facilities and a pipeline.

• OpCo's assets include three ethylene plants and a 200-mile ethylene pipeline serving key U.S. chemical markets.

• Maintains a close relationship with its sponsor, which retains a majority interest in OpCo and significant ownership in the partnership.

Financial performance and metrics

• Financial statements and management’s assessment of internal controls are incorporated by reference from the latest annual report.

• The last reported sales price of common units on the NYSE was $22.01 per unit as of March 3, 2026.

Use of proceeds and capital allocation

• Net proceeds from securities sales will be used for general partnership purposes, including debt repayment, capital expenditures, acquisitions, and working capital.

• Specific allocations for each offering will be detailed in the applicable prospectus supplement.