v3.26.3
Consolidated Statements of Operations - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Total net sales $ 314,459 $ 308,898 $ 917,234 $ 843,646
Cost of sales 210,563 209,475 624,774 592,610
Gross profit 103,896 99,423 292,460 251,036
Selling, general and administrative expenses 8,336 7,444 23,020 21,218
Income from operations 95,560 91,979 269,440 229,818
Other income (expense)        
Interest expense—Westlake (5,110) (5,947) (15,314) (17,391)
Other income, net 565 224 1,261 2,245
Income before income taxes 91,015 86,256 255,387 214,672
Provision for income taxes 158 42 513 354
Net income 90,857 86,214 254,874 214,318
Less: Net income attributable to noncontrolling interest in OpCo 74,638 71,561 210,248 180,159
Net income attributable to Westlake Chemical Partners LP and limited partners' interest in net income $ 16,219 $ 14,653 $ 44,626 $ 34,159
Net income per limited partner unit attributable to Westlake Chemical Partners LP (basic and diluted)        
Weighted average limited partner units outstanding (basic and diluted) (in units) 35,250,449 35,242,934 35,247,419 35,240,031
Common units        
Other income (expense)        
Net income attributable to Westlake Chemical Partners LP and limited partners' interest in net income $ 16,219 $ 14,653 $ 44,626 $ 34,159
Net income per limited partner unit attributable to Westlake Chemical Partners LP (basic and diluted)        
Common units (basic) (in usd per share) $ 0.46 $ 0.42 $ 1.27 $ 0.97
Common units (diluted) (in usd per share) $ 0.46 $ 0.42 $ 1.27 $ 0.97
Weighted average limited partner units outstanding (basic and diluted) (in units) 35,250,449 35,242,934 35,247,419 35,240,031
Common units | Westlake        
Net income per limited partner unit attributable to Westlake Chemical Partners LP (basic and diluted)        
Weighted average limited partner units outstanding (basic and diluted) (in units) 14,122,230 14,122,230 14,122,230 14,122,230
Publicly and Privately Held | Common units        
Net income per limited partner unit attributable to Westlake Chemical Partners LP (basic and diluted)        
Weighted average limited partner units outstanding (basic and diluted) (in units) 21,128,219 21,120,704 21,125,189 21,117,801
Affiliated Entity        
Net co-products, ethylene and other sales—third parties $ 261,935 $ 276,539 $ 763,056 $ 736,396
Affiliated Entity | Westlake        
Selling, general and administrative expenses 7,861 6,691 20,898 18,398
Other income (expense)        
Interest expense—Westlake (5,110) (5,947) (15,314) (17,391)
Nonrelated Party        
Net co-products, ethylene and other sales—third parties $ 52,524 $ 32,359 $ 154,178 $ 107,250