Westlake Corporation (WLK) | The Buildout — AI Infrastructure
The Verdict
Westlake is a vertically integrated producer of housing and infrastructure products and performance and essential materials. Its relevance to the AI buildout is indirect: PVC and PVCO pipe and fittings move water for site and cooling systems at data centers, and its ACI compounds business serves high-voltage wire and cable demand that management ties to data centers and electric vehicles.
| Market Cap | — |
| Revenue (TTM) | $11.0B |
| Revenue Growth | −8.6% |
| EBITDA Margin (TTM) | -4.2% |
| Net Debt | $3.9B |
| Earnings Beats | 1 of 7 |
| P/E (TTM) | — |
| EV/EBITDA (TTM) | — |
What We Like
- PEM EBITDA swung from $36M in Q1 2026 to $416M in Q2 2026, a $380M sequential increase driven by a 21% sequential average sales price rise and lower North American natural gas and ethane costs.
- The 3-pillar plan delivered ~$150M in Q1 and ~$150M in Q2, with a full-year target of $600M.
- Epoxy returned to profitability in Q2 2026 after prior annual EBITDA losses of more than $100M.
- HIP produced its second-highest quarterly revenue in history; Q2 pipe and fittings volume grew roughly 20% year-over-year.
- Over 85% of production capacity resides in North America, and Q2 operating rates were full out for polyethylene and above 90% for chlor-alkali.
What We’re Watching
- Middle East de-escalation or oil-price decline could compress the PEM spread; management ties H2 price trends to oil.
- Q3 pipe volumes may show a modest impact from Q2 pull-forward as customers secured supply after the conflict began.
- HIP margin was 22% in Q2, down from 24% a year earlier, reflecting PVC resin and freight inflation before price increases fully pass through.
- Plant reliability remains the lagging pillar of the 3-pillar plan; residual unplanned outages occurred in Q2.
The thesis is strengthening but depends on a geopolitical margin spike rather than a fully self-sustaining earnings base. Self-help is delivering—3-pillar savings, epoxy profitability, and debt retirement—and infrastructure volumes are growing, but HIP margin is compressing and management has not declared the PEM pricing regime permanent. The open question is whether the North American cost advantage can keep earnings elevated if oil-linked global prices normalize.
Earnings
Westlake reported Q2 2026 net sales of $3.3 billion, EBITDA of $679 million, and net income of $260 million. The standout was PEM segment EBITDA of $416 million, up $380 million sequentially and $364 million year-over-year, on a 21% sequential average sales price increase and lower North American gas and ethane costs.
| Metric | Q1 FY2026 | Q4 FY2025 | Q1 FY2025 | YoY |
|---|---|---|---|---|
| Revenue | $2.7B | $2.5B | $2.8B | −6.8% |
| Gross margin | 3.1% | -17.3% | 8.2% | -510bps |
| EBITDA | $130M | −$315M | $251M | −48.2% |
| EPS | $-1.32 | $-4.22 | $-0.31 | +323.5% |
| PEM EBITDA | $416M | $36M | $52M | Up $364M y/y |
During the second quarter, a spike in global oil price drove significantly higher cost for competitors in higher cost regions like Asia and Europe, which along with tighter global supply-demand conditions contributed to a 21% sequential increase in PEM’s average sales price. At the same time, PEM’s own production costs, which are mostly based on more affordable North American natural gas and NGLs were largely immune to the spike in oil prices.— Jean-Marc Gilson, August 4, 2026
Management tone: Management shifted from cautious optimism to a more assertive framing of Westlake’s North American cost position after the Middle East supply shock in Q1. By Q2, management remained confident but tied future price trends to global oil movements and was candid about pipe pull-forward risk and lagging reliability.
Management Guidance
HIP is guided to the low end of $4.4B–$4.6B revenue and 19%–21% EBITDA margin, excluding identified items. Westlake reiterated 2026 capex of $900 million, cash interest of about $215 million, and the $600 million 3-pillar EBITDA target. Management expects a second-half working-capital release, especially in Q4, and no major turnarounds in H2. No total-company 2026 EBITDA or EPS guidance was provided.
Trajectory
The trailing financial data through Q1 FY2026 shows revenue decelerating to $2,652M and gross margin compressing to 3.1%, with EBITDA of $130M. The Q2 2026 call then reported a sharp step-up to $3.3B revenue and $679M EBITDA, driven by PEM pricing and lower feedstocks rather than broad volume expansion. HIP revenue reached its second-highest quarterly level, but its EBITDA margin slipped to 22% from 24% a year earlier.
The Model
The model projects FY+1 revenue of $12,110M with EBITDA of $2,216M, an 18.3% margin, and FY+2 revenue of $12,450M with EBITDA of $2,378M, a 19.1% margin. The near-term estimate is anchored by the PEM price/cost spread, 3-pillar savings, and HIP holding near the low end of its guided range; FY+2 assumes Wilhelmshaven begins contributing more meaningfully and the Wichita Falls PVCO plant starts up at the end of 2026.
| Metric | FY2025 | Next FY (E) | Following FY (E) |
|---|---|---|---|
| Revenue | $11.2B | $12.1B | $12.4B |
| YoY Growth | — | +8.4% | +2.8% |
| EBITDA | −$341M | $2.2B | $2.4B |
| EBITDA Margin | -3.1% | 18.3% | 19.1% |
Projections are the median of 5 independent model runs. The model’s revenue sits 2.9% above analyst consensus.
HIP is guided to the low end of $4.4B–$4.6B revenue and 19%–21% EBITDA margin, excluding identified items. Westlake reiterated 2026 capex of $900 million, cash interest of about $215 million, and the $600 million 3-pillar EBITDA target. Management expects a second-half working-capital release, especially in Q4, and no major turnarounds in H2. No total-company 2026 EBITDA or EPS guidance was provided.
What Could Go Right — and Wrong
- The Middle East disruption persists through 2026, keeping global polyethylene, PVC, and caustic pricing elevated while North American natural gas and ethane stay low.
- The 3-pillar plan delivers the remaining $300M of the $600M 2026 target, and the reliability pillar improves enough to support full utilization.
- Data-center pipe demand becomes measurable and sustained, confirming a larger portion of pipe demand is infrastructure-driven.
- Wilhelmshaven integrates faster or more profitably than expected, with a confirmed EDC or ethylene feedstock scope and a 2027 earnings contribution.
- HIP infrastructure growth, including municipal and data-center pipe demand, continues to offset weak single-family construction.
- A rapid Middle East de-escalation or oil-price decline compresses the PEM spread that produced Q2 earnings.
- Q3 pipe volumes weaken more than the modest impact management warned about after the Q2 pull-forward.
- High polyethylene, PVC, and caustic prices cause downstream demand destruction.
- Residential construction deteriorates further and overwhelms the infrastructure-side strength in HIP.
- Plant reliability fails to improve, leaving the third pillar of the self-help program unfulfilled.
Looking Ahead
Management’s stated next-12-month path runs through H2 2026 integration of Wilhelmshaven, a more meaningful PEM contribution next year, and the end-2026 startup of the Wichita Falls PVCO pipe plant. The plan also includes the $600 million 3-pillar EBITDA benefit for 2026, higher H2 operating rates, no major turnarounds, and a Q4 working-capital release.
- H2 2026Wilhelmshaven integration begins — Tests whether North American feedstock reaches the German PVC/VCM site.
- Q3 2026Q3 pipe and HIP results — Tests pull-forward impact and HIP price realization after pass-through lag.
- Q3/Q4 2026Remaining 3-pillar savings — Tests delivery of the remaining $300M of the 2026 target.
- End 2026Wichita Falls PVCO startup — Tests mechanical completion and Pipe & Fittings volume ramp.
- Q4 2026Working capital release — Tests cash conversion improvement management expects especially in Q4.
- 2027Wilhelmshaven earnings contribution — Tests whether more meaningful PEM sales and earnings contribution begins.
Financials
Annual Summary
| Metric | FY2024 | FY2025 | TTM | YoY |
|---|---|---|---|---|
| Revenue | $12.1B | $11.2B | $11.0B | -8.0% |
| Gross Margin | 16.0% | 2.0% | 1.2% | 1,400bps |
| EBITDA | $2.0B | −$341M | $18.5B | -117.1% |
| EBITDA Margin | 16.4% | -3.1% | -4.2% | 1,943bps |
| Net Income | $602M | −$1.5B | −$1.6B | -350.5% |
| Free Cash Flow | $306M | −$530M | $8.0B | — |
| Net Cash | — | — | — | — |
Key Ratios (Trailing)
- P/E TTM—
- EV/EBITDA TTM—
- EV/Revenue TTM—
- Price/FCF TTM—
- Gross Margin (TTM)1.2%
- EBITDA Margin (TTM)-4.2%
- Net Margin (TTM)-14.9%
- ROIC-10.8%
- SBC / Revenue-0.1%
The Company
Westlake makes the physical materials and products behind housing, infrastructure, and essential manufacturing. Its two segments cover PVC pipe, siding, trim, windows, roof tiles, and compounds on the housing and infrastructure side, and ethylene, polyethylene, PVC resin, epoxy, caustic soda, and chlorine on the materials side. The AI buildout matters to Westlake mainly through PVC and PVCO pipe used in data-center cooling-water and site infrastructure, and through the ACI high-voltage wire and cable compounds business.
Westlake operates as a vertically integrated producer, with more than 85% of production capacity in North America and a gas-based cost position management calls advantaged. It has been reshaping capacity: closing epoxy, styrene, and chlorovinyl units while adding the Wilhelmshaven PVC/VCM site in Germany and ACI compounds. Primary North American sites include Calvert City, Kentucky; Lake Charles, Plaquemine, and Geismar, Louisiana; Longview and Deer Park, Texas; and other disclosed locations.
Business Segments
Competitive Landscape
The 10-K lists competitors across housing products, compounds, ethylene/polyethylene, chlor-alkali/PVC, and epoxy. Westlake’s own positioning emphasizes vertical integration and North American gas-based feedstock costs, and management repeated that advantage when oil-linked competitor costs rose in Q2 2026.
Supply Chain
Westlake sits as an integrated producer spanning chlorovinyls, epoxy, and downstream building products. It sells HIP products through distributors, contractors, and national homebuilders, while PEM sells to industrial customers; data-center operators are not direct customers.
More on WLK: Earnings recap