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Related-Party Transactions (Tables)
 6 Months Ended
Jun. 30, 2026
Related Party Transaction [Line Items]  
Related-Party Transactions Tables The following tables summarize material related-party transactions included in the Partnership’s consolidated financial statements:
Statements of operations
Three Months Ended 
June 30,		Six Months Ended 
June 30,
thousands2026202520262025
Revenues and other
Service revenues – fee based$542,295 $559,192 $1,080,356 $1,100,937 
Service revenues – product based18,923 12,254 35,949 24,113 
Product sales8,163 4,801 14,018 9,599 
Other643 — 1,160 — 
Total revenues and other570,024 576,247 1,131,483 1,134,649 
Equity income, net – related parties (1)
21,536 27,128 36,312 47,563 
Operating expenses
Cost of product (2)
39,798 (9,028)33,768 (23,042)
Operation and maintenance1,169 1,560 2,618 3,481 
General and administrative— 179 (20)210 
Total operating expenses40,967 (7,289)36,366 (19,351)
Gain (loss) on divestiture and other, net— — 1,366 — 
_________________________________________________________________________________________
(1)See Note 7.
(2)Includes related-party natural-gas and NGLs imbalances.

Balance sheets
thousandsJune 30,
2026		December 31,
2025
Assets
Accounts receivable, net$370,453 $407,941 
Other current assets8,819 524 
Equity investments (1)
493,467 504,859 
Other assets33,311 33,124 
Total assets906,050 946,448 
Liabilities
Accounts and imbalance payables30,545 20,639 
Accrued liabilities (2)
184,974 14,991 
Other liabilities (2)
979,905 631,292 
Total liabilities1,195,424 666,922 
_________________________________________________________________________________________
(1)See Note 7.
(2)Includes contract liabilities from contracts with customers. See Note 2.
6. RELATED-PARTY TRANSACTIONS

Statements of cash flows
Six Months Ended 
June 30,
thousands20262025
Distributions from equity-investment earnings – related parties
$40,375 $51,419 
Contributions to equity investments – related parties(2,578)— 
Distributions from equity investments in excess of cumulative earnings – related parties9,907 14,047 
Distributions to Partnership unitholders (1)
(307,289)(311,914)
Distributions to WES Operating unitholders (2)
(14,505)(14,217)
_________________________________________________________________________________________
(1)Represents common and general partner unit distributions paid to Occidental pursuant to the partnership agreement of the Partnership. See Note 4 and Note 5.
(2)Represents distributions paid to Occidental, through its ownership of WGRAH, pursuant to WES Operating’s partnership agreement. See Note 4 and Note 5.
WES Operating [Member]  
Related Party Transaction [Line Items]  
Related-Party Transactions Tables
The following tables summarize material related-party transactions for WES Operating (which are included in the Partnership’s consolidated financial statements) to the extent the amounts differ materially from the Partnership’s consolidated financial statements:
Statements of operations
Three Months Ended 
June 30,		Six Months Ended 
June 30,
thousands2026202520262025
General and administrative (1)
$980 $1,019 $2,480 $2,556 
_________________________________________________________________________________________
(1)Includes an intercompany service fee between the Partnership and WES Operating.

Balance sheets
thousandsJune 30,
2026		December 31,
2025
Other current assets$8,636 $447 
Other assets28,529 29,957 
Accounts and imbalance payables (1)
33,857 76,040 
_________________________________________________________________________________________
(1)Includes balances related to transactions between the Partnership and WES Operating.

Statements of cash flows
Six Months Ended 
June 30,
thousands20262025
Distributions to WES Operating unitholders (1)
$(764,594)$(710,646)
_________________________________________________________________________________________
(1)Represents distributions paid to the Partnership and Occidental, through its ownership of WGRAH, according to the terms of WES Operating’s partnership agreement. See Note 4 and Note 5.