Westlake Chemical Partners LP

Company Overview

Business Model: Westlake Chemical Partners LP is a Delaware limited partnership formed by Westlake Corporation to operate, acquire, and develop ethylene production facilities and related assets. Its sole revenue-generating asset is its 22.8% limited partner interest in Westlake Chemical OpCo LP. Westlake Chemical OpCo LP's primary revenue source is the Ethylene Sales Agreement with Westlake Corporation, which requires Westlake Corporation to purchase 95% of Westlake Chemical OpCo LP's planned ethylene production annually on a cost-plus basis, generating a fixed margin of $0.10 per pound, less co-product sales. Any ethylene not sold to Westlake Corporation and all co-products are sold to third parties on either a spot or contract basis. Westlake Chemical OpCo LP primarily converts ethane into ethylene.

Market Position: Ethylene is the world's most widely used petrochemical, serving as a key building block for derivatives such as polyethylene and polyvinyl chloride, which are used in a wide variety of end markets including packaging, construction, and transportation. Westlake Chemical OpCo LP's three ethylene production facilities have an aggregate annual capacity of approximately 3.7 billion pounds. The Ethylene Sales Agreement with Westlake Corporation substantially mitigates direct exposure to commodity price fluctuations for 95% of planned volumes. Westlake Chemical OpCo LP also owns and operates a 200-mile common carrier ethylene pipeline in Texas.

Recent Strategic Developments:

• Ethylene Sales Agreement and Feedstock Supply Agreement Renewal: On October 28, 2025, Westlake Chemical OpCo LP and Westlake Corporation renewed both the Ethylene Sales Agreement and the Feedstock Supply Agreement through December 31, 2027.
• Services and Secondment Agreement and Omnibus Agreement Amendments: Concurrently, the Services and Secondment Agreement and the Omnibus Agreement were amended to align their expiration dates with the Ethylene Sales Agreement. The Omnibus Agreement amendment also addressed procedural requirements for Westlake Corporation's indemnification obligations.
• Petro 1 Turnaround: A planned maintenance turnaround of the Petro 1 production facility commenced in January 2025 and concluded in April 2025, extending beyond the planned March 2025 completion.

Geographic Footprint: All assets and operations are located and conducted in the United States. Ethylene production facilities are situated in Lake Charles, Louisiana (Petro 1 and Petro 2) and Calvert City, Kentucky (Calvert City Olefins). The Longview Pipeline operates within Texas.

Financial Performance

Revenue Analysis

Profitability Metrics (2025):

• Gross Margin: 29.8%
• Operating Margin: 27.4%
• Net Margin: 25.6%

Investment in Growth:

• R&D Expenditure: Not explicitly disclosed as a separate line item.
• Capital Expenditures: $78.8 million
• Strategic Investments: The Partnership may offer and sell common units under an At-the-Market program (up to $50.0 million, no units issued as of December 31, 2025) for general partnership purposes, including potential drop-downs and other acquisitions. Westlake Corporation may loan additional cash to Westlake Chemical OpCo LP to fund its expansion capital expenditures in the future, though it is not obligated to do so.

Business Segment Analysis

Westlake Chemical OpCo LP Segment

Financial Performance (2025):

• Revenue: $1,166.7 million (+2.7% YoY)
• Operating Margin: 27.4%
• Key Growth Drivers: The increase in net sales was primarily due to higher ethylene sales prices to Westlake Corporation and a Buyer Deficiency Fee of $5.8 million resulting from the Petro 1 turnaround extending into April 2025. This was partially offset by lower ethylene and co-products sales volumes to Westlake Corporation and third parties due to reduced production from the Petro 1 turnaround, and higher ethane feedstock and natural gas costs.

Product Portfolio:

• Major product lines: Ethylene, propylene, crude butadiene, pyrolysis gasoline, and hydrogen.

Market Dynamics:

• Westlake Chemical OpCo LP's primary business is substantially insulated from direct competition for 95% of planned ethylene volumes due to the Ethylene Sales Agreement with Westlake Corporation.
• For the remaining 5% of planned ethylene volumes and any excess volumes not sold to Westlake Corporation, Westlake Chemical OpCo LP competes with other regional merchant ethylene producers, including LyondellBasell Industries, N.V., Shell Chemical Company, BASF Corporation, and Motiva Enterprises LLC.
• Demand for ethylene exhibits cyclical commodity characteristics, but the contractual arrangements with Westlake Corporation are designed to mitigate exposure to market price fluctuations.

Sub-segment Breakdown:

• Lake Charles Olefins (Petro 1 and Petro 2): Two ethylene production facilities with a combined annual capacity of approximately 3 billion pounds. Primarily use ethane as feedstock, with Petro 2 also capable of processing an ethane/propane mix, propane, butane, or naphtha. Ethylene produced is used for polyethylene and polyvinyl chloride production.
• Calvert City Olefins: One ethylene production facility with an annual capacity of approximately 730 million pounds. Uses ethane or propane as feedstock. Ethylene produced is used for polyvinyl chloride production.
• Longview Pipeline: A 200-mile, 10-inch diameter common carrier ethylene pipeline system with a capacity of 3.5 million pounds per day, connecting Mont Belvieu, Texas to the Longview, Texas chemical site.

Capital Allocation Strategy

Shareholder Returns:

• Share Repurchases: Not disclosed.
• Dividend Payments: $66.5 million (2025) in distributions to unitholders.
• Future Capital Return Commitments: The Partnership intends to distribute quarterly at least $0.2750 per unit, subject to sufficient cash after the establishment of cash reserves and the payment of expenses. The board of directors may modify or revoke this policy at its discretion.

Balance Sheet Position (as of December 31, 2025):

• Cash and Equivalents: $44.3 million
• Total Debt: $399.7 million (all variable-rate debt owed to affiliates of Westlake Corporation)
• Net Cash Position: -$355.4 million (Net Debt)
• Debt Maturity Profile: All $399.7 million of outstanding debt matures on July 12, 2027, consisting of the OpCo Revolver and the MLP Revolver.

Cash Flow Generation:

• Operating Cash Flow: $280.5 million
• Free Cash Flow: $201.7 million (calculated as Operating Cash Flow less Capital Expenditures)
• Cash Conversion Metrics: Not explicitly detailed, but the Ethylene Sales Agreement's cost-plus structure is designed to promote cash flow stability.

Operational Excellence

Production & Service Model:

• Westlake Chemical OpCo LP operates three ethylene production facilities that primarily convert ethane into ethylene.
• Westlake Corporation provides comprehensive operating services, utility services, maintenance, and seconded employees to Westlake Chemical OpCo LP under the Services and Secondment Agreement.
• Westlake Chemical OpCo LP holds perpetual and paid-up licenses for steam cracking and process recovery technology used at its ethylene plants.

Supply Chain Architecture: Key Suppliers & Partners:

• Feedstock Supplier: Westlake Petrochemicals LLC, a wholly owned subsidiary of Westlake Corporation, supplies ethane and other feedstocks under the Feedstock Supply Agreement.
• Operational Services: Westlake Corporation provides operating services, utility access, maintenance, and seconded employees under the Services and Secondment Agreement.
• Administrative Services: Westlake Corporation provides various administrative services, including finance, legal, information technology, and human resources, under the Omnibus Agreement.

Facility Network:

• Manufacturing: Two ethylene production facilities at Westlake Corporation's Lake Charles, Louisiana site (Petro 1 and Petro 2) and one at Westlake Corporation's Calvert City, Kentucky site (Calvert City Olefins).
• Distribution: A 200-mile common carrier ethylene pipeline (Longview Pipeline) connecting Mont Belvieu, Texas to Longview, Texas.

Operational Metrics:

• Annual Production Capacity: Approximately 3.7 billion pounds (3,720 million pounds).
• Turnaround Schedule: Each of Westlake Chemical OpCo LP's ethylene production facilities requires turnaround maintenance approximately every five to eight years, typically lasting between 30 and 60 days.
• Employee Headcount: As of December 31, 2025, 155 employees of Westlake Corporation were seconded to Westlake Chemical OpCo LP. 15% of these seconded employees are covered by a collective bargaining agreement expiring in November 2029.

Market Access & Customer Relationships

Go-to-Market Strategy: Distribution Channels:

• Direct Sales: Sales of ethylene production in excess of volumes sold to Westlake Corporation, as well as all associated co-products, are sold directly to third parties on either a spot or contract basis.

Customer Portfolio: Enterprise Customers:

• Strategic Partnerships: Westlake Corporation is the primary customer, accounting for approximately 88.6% of the Partnership's net sales in 2025. Westlake Corporation is obligated to purchase 95% of Westlake Chemical OpCo LP's planned ethylene production under a long-term, fee-based agreement.

Geographic Revenue Distribution:

• All of Westlake Chemical OpCo LP's sales are attributed to the United States.

Competitive Intelligence

Market Structure & Dynamics

Industry Characteristics:

• The ethylene industry is characterized by its role as a foundational petrochemical, with demand exhibiting cyclical commodity characteristics influenced by supply and demand balances, operating rates, and general economic activity.

Competitive Positioning Matrix:

Direct Competitors

Primary Competitors:

• For the approximately 5% of planned ethylene volumes and any excess volumes not sold to Westlake Corporation, Westlake Chemical OpCo LP competes with other regional merchant ethylene producers, including LyondellBasell Industries, N.V., Shell Chemical Company, BASF Corporation, and Motiva Enterprises LLC.

Competitive Response Strategy:

• The Ethylene Sales Agreement is designed to provide cash flow stability and minimize direct exposure to commodity price fluctuations.
• The Partnership evaluates future growth opportunities, including increasing its ownership interest in Westlake Chemical OpCo LP, acquiring other qualified income streams, pursuing organic growth opportunities such as expansions of current ethylene facilities, and negotiating a higher fixed-margin in the Ethylene Sales Agreement with Westlake Corporation.

Risk Assessment Framework

Strategic & Market Risks

Market Dynamics:

• Cyclicality: The demand for ethylene exhibits cyclical commodity characteristics, although the Ethylene Sales Agreement is designed to mitigate direct exposure to commodity price fluctuations.
• Customer Concentration: The Partnership is substantially dependent on Westlake Corporation for its cash flows, with Westlake Corporation accounting for approximately 88.6% of net sales in 2025. This creates credit risk if Westlake Corporation's business is adversely impacted or if it defaults on its obligations.

Operational & Execution Risks

Supply Chain Vulnerabilities:

• Supplier Dependency: Westlake Chemical OpCo LP depends on Westlake Corporation for feedstock supply under the Feedstock Supply Agreement.
• Geographic Concentration: Substantially all of Westlake Chemical OpCo LP's sales are generated at three facilities located at two sites (Lake Charles, Louisiana and Calvert City, Kentucky), making operations vulnerable to adverse developments or severe weather conditions.
• Capacity Constraints: Westlake Chemical OpCo LP's assets are currently operating at close to full capacity, which may limit its ability to increase throughput volumes without expansion.

Financial & Regulatory Risks

Market & Financial Risks:

• Demand Volatility: The Partnership has indirect exposure to commodity price fluctuations to the extent they affect the ethylene consumption patterns of third-party purchasers.
• Credit & Liquidity: The Partnership's variable-rate debt exposes it to increases in interest rates. Westlake Chemical OpCo LP is a restricted subsidiary under certain indentures governing Westlake Corporation's senior notes, which limits its ability to incur additional indebtedness.

Regulatory & Compliance Risks:

• Industry Regulation: Westlake Chemical OpCo LP is subject to extensive federal, state, and local environmental, health, and safety laws and regulations, including those pertaining to air emissions (e.g., EPA's ethylene MACT rule, NESHAPs) and greenhouse gas emissions. Compliance with these regulations requires capital expenditures and increases operating costs.
• Pipeline Regulation: The Longview Pipeline is regulated as a common carrier intrastate pipeline in Texas by the Texas Railroad Commission.

Geopolitical & External Risks

Geopolitical Exposure:

• Geographic Dependencies: While the Partnership's operations are in the U.S., global economic conditions, political tensions, and conflicts (e.g., in the Middle East and between Russia and Ukraine) can indirectly affect Westlake Corporation's ability to meet its contractual obligations.

Innovation & Technology Leadership

Research & Development Focus: Core Technology Areas:

• Steam Cracking and Process Recovery: Westlake Chemical OpCo LP utilizes perpetual and paid-up licenses for these technologies in its ethylene plants.

Intellectual Property Portfolio:

• Patent Strategy: Not explicitly detailed beyond technology licenses.

Technology Partnerships:

• Strategic Alliances: Not explicitly detailed.

Leadership & Governance

Executive Leadership Team (as of February 27, 2026)

Board Composition: The general partner's board of directors consists of eight directors, three of whom are independent (G. Stephen Finley, Lisa A. Friel, and Randy G. Woelfel) as defined by NYSE and Exchange Act standards. The board has an Audit Committee and a Conflicts Committee, both comprised of the independent directors.

Human Capital Strategy

Workforce Composition:

• Total Employees: Neither the Partnership nor Westlake Chemical OpCo LP directly employs individuals. As of December 31, 2025, 155 employees of Westlake Corporation were seconded to Westlake Chemical OpCo LP.
• 15% of seconded employees are covered by a collective bargaining agreement, which will expire in November 2029.

Talent Management: Acquisition & Retention:

• Hiring Strategy: Westlake Corporation is responsible for providing employees to Westlake Chemical OpCo LP under the Services and Secondment Agreement.

Environmental & Social Impact

Environmental Commitments: Climate Strategy:

• Emissions Targets: Westlake Corporation announced in November 2025 that it successfully met its publicly disclosed target to reduce its Scope 1 and Scope 2 CO2 equivalent emissions intensity per ton of production by 20% from a 2016 baseline in 2024. It subsequently announced a new target to further reduce these emissions by an additional 5% by 2030, using a 2024 baseline.

Business Cyclicality & Seasonality

Demand Patterns:

• Economic Sensitivity: Demand for ethylene exhibits cyclical commodity characteristics, with margins on ethylene derivative products influenced by changes in supply and demand, operating rates, and general economic activity.
• Industry Cycles: The chemical industry is cyclical. The Ethylene Sales Agreement is designed to mitigate the Partnership's direct exposure to commodity price fluctuations and promote cash flow stability.

Planning & Forecasting:

• Turnaround activities for each ethylene production facility are scheduled approximately once every five to eight years, typically lasting between 30 and 60 days. The Partnership reserves cash annually to cover these costs, aiming to reduce variability in Westlake Chemical OpCo LP's cash flow.

Regulatory Environment & Compliance

Regulatory Framework: Industry-Specific Regulations:

• Environmental Regulations: Westlake Chemical OpCo LP is subject to extensive federal, state, and local environmental, health, and safety laws and regulations, including the Clean Air Act, Water Pollution Control Act, Resource Conservation and Recovery Act, and CERCLA.
• Air Emissions: Compliance with EPA's ethylene MACT rule (amended July 2020, further amendments finalized April 2024) and National Emission Standards for Hazardous Air Pollutants (NESHAPs) for the synthetic organic chemical manufacturing industry (amendments finalized May 2024) may require capital expenditures and increased operating costs.
• Greenhouse Gas Emissions: Subject to EPA rules requiring the reporting of GHG emissions. The U.S. submitted formal notification to withdraw from the Paris Agreement in January 2025, effective January 2026.
• Pipeline Regulation: The Longview Pipeline, as a common carrier intrastate pipeline in Texas, is subject to rate regulation under the Texas Utilities Code, as implemented by the Texas Railroad Commission.

Legal Proceedings:

• The Partnership is involved in lawsuits, investigations, and claims in the ordinary course of business, including environmental and employee-related matters. Management does not believe any currently pending legal proceedings will have a material adverse effect on its business, results of operations, cash flows, or financial condition.
• Westlake Corporation indemnifies the Partnership for certain environmental and other liabilities that occurred or existed prior to August 4, 2014, and for certain liabilities incurred in connection with Westlake Corporation's services under the Services and Secondment Agreement.

Tax Strategy & Considerations

Tax Profile:

• Effective Tax Rate: 0.2% (2025).
• Geographic Tax Planning: The Partnership is treated as a partnership for U.S. federal income tax purposes and is not liable for entity-level federal income taxes. It is subject to state and local income taxes, primarily in Kentucky and Texas.
• Tax Reform Impact: The "One Big Beautiful Bill Act" (OBBBA), signed July 4, 2025, modified the limitation on the deduction of business interest for taxable years beginning after December 31, 2024, by calculating adjusted taxable income before deductions for depreciation, amortization, and depletion.

Insurance & Risk Transfer

Risk Management Framework:

• Insurance Coverage: The Partnership maintains property, business interruption, and casualty insurance that it believes is in accordance with customary industry practices. However, it cannot be fully insured against all potential hazards, including losses from wars or terrorist acts, and certain policies may be subject to coverage limitations.
• Risk Transfer Mechanisms: Westlake Corporation indemnifies the Partnership for certain environmental and other losses that occurred or existed prior to August 4, 2014, and for certain liabilities incurred in connection with Westlake Corporation's services under the Services and Secondment Agreement.