1.Sales and profit
See section →- Westlake had $11.2B of revenue in fiscal 2025, down 8.0% on the year before. Over five years, revenue changed +8.3% a year on average.
- Its operating margin was −14.1%, down 21.3 pts: of every 100 in sales, about −14 is left after running the business.
- Westlake lost $1.5B in fiscal 2025.




