Westlake Chemical Partners LP - 2025 Annual Report Summary
Business Context and Reporting Period
This summary covers the Form 10-K for Westlake Chemical Partners LP (WLKP) for the fiscal year ended December 31, 2025. WLKP is a Delaware limited partnership that operates, acquires, and develops ethylene production facilities. Its sole revenue-generating asset is a 22.8% limited partner interest in Westlake Chemical OpCo LP ("OpCo"), which owns three ethylene production facilities (Lake Charles Olefins and Calvert City Olefins) and a 200-mile ethylene pipeline. Westlake Corporation owns the remaining 77.2% of OpCo and 40.1% of WLKP's common units. The partnership's operations are heavily integrated with Westlake, which purchases approximately 95% of OpCo's ethylene production under a cost-plus Ethylene Sales Agreement.
Key Financial Metrics
| Metric | 2025 | 2024 |
|---|---|---|
| Total Net Sales | $1,166.7 million | $1,135.9 million |
| Gross Profit | $347.8 million | $418.9 million |
| Gross Margin | 29.8% | 36.9% |
| Net Income (Consolidated) | $298.6 million | $369.2 million |
| Net Income Attributable to WLKP | $48.7 million | $62.4 million |
| Net Income Per Unit (Basic & Diluted) | $1.38 | $1.77 |
| MLP Distributable Cash Flow | $53.4 million | $66.9 million |
| EBITDA | $450.0 million | $507.6 million |
| Operating Cash Flow | $280.5 million | $485.0 million |
| Total Debt Outstanding | $399.7 million | $399.7 million |
| Cash and Cash Equivalents | $44.3 million | $58.3 million |
Material Changes vs. Prior Period
- Revenue: Net sales increased 2.7% to $1.167 billion, driven by higher ethylene sales prices to Westlake and a $5.8 million Buyer Deficiency Fee. This was partially offset by lower sales volumes due to the Petro 1 turnaround.
- Profitability: Gross profit decreased by $71.1 million (16.7%) and gross margin contracted from 36.9% to 29.8%. This decline was primarily due to higher ethane feedstock and natural gas costs, which increased by 32.8% and 50.7% respectively compared to 2024.
- Operational Impact: The Petro 1 turnaround, which extended into April 2025, reduced production volumes. However, the delay triggered a Buyer Deficiency Fee from Westlake for the annual production deficiency.
- Cash Flow: Operating cash flow decreased significantly by $204.5 million to $280.5 million, largely due to cash used for the Petro 1 turnaround and lower income from operations.
- Interest Expense: Interest expense decreased to $22.9 million from $25.7 million due to lower interest rates on outstanding debt.
Guidance, Outlook, and Risks
- Contract Renewals: On October 28, 2025, WLKP and Westlake renewed the Ethylene Sales Agreement and Feedstock Supply Agreement through December 31, 2027. These agreements maintain the cost-plus pricing structure with a $0.10 per pound fixed margin.
- Distributions: The board declared a quarterly distribution of $0.4714 per unit for Q4 2025, payable in February 2026. The partnership intends to distribute most excess cash generated by operations.
- Liquidity: The partnership maintains $399.7 million in variable-rate debt (OpCo Revolver and MLP Revolver) maturing in 2027. Cash on hand is $44.3 million, supplemented by $23.4 million invested under an Investment Management Agreement with Westlake.
- Risks:
- Concentration Risk: Westlake accounted for 88.6% of net sales in 2025. The partnership is substantially dependent on Westlake's creditworthiness and ability to meet purchase obligations.
- Commodity Prices: While the Ethylene Sales Agreement mitigates direct price risk for 95% of production, the partnership remains exposed to feedstock cost volatility (ethane and natural gas) which directly impacts gross margins.
- Operational Hazards: Risks include facility shutdowns, environmental regulations, and climate-related events, particularly at the Lake Charles facility.
Key Facts for Investor Verification
- Buyer Deficiency Fee: Verify the collection of the $5.8 million fee recognized in 2025 due to the Petro 1 turnaround delay and its impact on future receivables.
- Feedstock Cost Pass-Through: Confirm the mechanism by which rising ethane and natural gas costs are passed through to Westlake under the Ethylene Sales Agreement and the timing of any "Shortfall" recoveries.
- Debt Covenants: Review the MLP Revolver leverage ratio covenants (4.50:1.00 or 5.50:1.00 post-acquisition) to ensure compliance given the variable-rate debt structure.
- Turnaround Schedule: Monitor the schedule for future turnarounds at Calvert City Olefins and Lake Charles Olefins, as these events significantly impact cash flow and production volumes.
- Related Party Transactions: Scrutinize the $226.1 million in expenses reimbursed to Westlake for services and the allocation of executive compensation.