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Segment Information (Tables)

12 Months Ended

Dec. 31, 2025

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

						Year Ended December 31,
						2025						2024						2023
Significant segment expenses and other segment items
OpCo
Raw material, energy, manufacturing and logistics costs						$	690,869					$	605,058					$	693,129
Depreciation and amortization						127,978						111,899						110,203
Total cost of sales						818,847						716,957						803,332
Selling, general and administrative expenses						24,853						24,699						26,217
Other segment items (1)						(582)						(3,005)						(1,786)
Interest expense—Westlake
OpCo						$	1,316					$	1,410					$	1,496
Corporate						21,583						24,291						25,005
						$	22,899					$	25,701					$	26,501
Net income
OpCo						$	323,577					$	397,245					$	363,028

A reconciliation of total segment net income to consolidated net income is as follows:

						Year Ended December 31,
						2025						2024						2023
Net income from OpCo						$	323,577					$	397,245					$	363,028
Corporate net loss						(25,001)						(28,086)						(28,402)
Net income						$	298,576					$	369,159					$	334,626

						December 31,
						2025						2024
Total assets
OpCo						$	1,222,123					$	1,238,420
Corporate						34,410						49,536
						$	1,256,533					$	1,287,956

_____________________________

(1)Other segment items includes interest expense—Westlake, other income, net and provision for income taxes.

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- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 25
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-25

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-22

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-30

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X

- References

No definition available.

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