XML 54 R41.htm IDEA: XBRL DOCUMENT
v3.25.4

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.

X
- 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 + Details
Name: | us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_SegmentReportingAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration