Note 19 – Segment Disclosures
Williams
Williams’ reportable segments are Transmission, Power & Gulf; Northeast G&P; West; and Gas & NGL Marketing Services. All remaining business activities are included in Other. (See Note 1 – Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies.)
Performance Measurement
Williams’ CODM is the Chief Executive Officer. Williams’ CODM primarily utilizes Modified EBITDA, its measure of segment profit and loss, to evaluate performance and make decisions on capital allocation and human resources. Such evaluation includes periodic comparisons of actual performance versus historical and budget, as well as projections of Modified EBITDA.
Williams defines Modified EBITDA of reportable segments as follows:
Income (loss) before income taxes excluding:
Contributions from upstream operations, corporate, and other business activities;
Depreciation, depletion, and amortization expenses;
Equity earnings (losses);
Other investing income (loss) net;
Interest expense; and
Accretion expense associated with AROs for nonregulated operations.
This measure is further adjusted to include Williams’ proportionate share (based on ownership interest) of Modified EBITDA from its equity-method investments, including its indirect share from interests owned by equity-method investees, calculated consistently with the definition described above.
Significant noncash items which are components of Modified EBITDA may include net unrealized gain (loss) from commodity derivatives within Total revenues, net unrealized gain (loss) from commodity derivatives within Net processing commodity expenses for Williams’ Gas & NGL Marketing Services segment, charges associated with lower of cost or net realizable value adjustments to the Gas & NGL Marketing Services segment inventory within Product sales (for natural gas marketing inventory as these sales are presented net of the related costs) and Product costs (for NGL marketing inventory), and impairments or write-offs of certain assets within Other (income) expense – net within Operating income (loss).
Intersegment Service revenues primarily represent transportation services provided to Williams’ marketing business and gathering services provided to its upstream oil and gas properties. Intersegment Product sales primarily represent the sale of natural gas and NGLs from Williams’ natural gas processing plants and its oil and gas properties to its marketing business.
Segment assets include Investments, Property, plant, and equipment – net, and Intangible assets – net.
The following tables present revenues, Modified EBITDA, significant expenses, and certain segment assets measures:
Transmission, Power & GulfNortheast G&PWest
Gas & NGL Marketing Services (1)
Total
(Millions)
2025
Segment revenues:
Service revenues
External$4,731 $1,980 $1,621 $— $8,332 
Internal95 15 230 — 340 
Total service revenues4,826 1,995 1,851 — 8,672 
Total service revenues – commodity consideration104 86 — 192 
Product sales
External156 49 142 2,776 3,123 
Internal356 122 764 (670)572 
Total product sales512 171 906 2,106 3,695 
Net gain (loss) from commodity derivatives
Realized— (69)(64)
Unrealized— — — 138 138 
Total net gain (loss) from commodity derivatives (2)— 69 74 
Total revenues of reportable segments$5,443 $2,168 $2,847 $2,175 $12,633 
Reconciliation of revenues:
Revenues from upstream operations, corporate, and other business activities632 
Net unrealized gain (loss) from commodity derivatives for upstream operations10 
Eliminations(1,325)
Total consolidated revenues$11,950 
Segment costs and expenses and Proportional Modified EBITDA of equity-method investments:
Product costs and net realized processing commodity expenses(549)(149)(876)(1,811)
Net unrealized gain (loss) from commodity derivatives within Net processing commodity expenses— — — 
Operating and administrative expenses (3)(1,142)(449)(605)(93)
Recoverable power, transportation, and storage costs (4)(247)(172)(62)— 
Other segment income (expenses) - net (5)68 (10)
Impairment or write-off of certain assets (6)— — (212)— 
Proportional Modified EBITDA of equity-method investments147 640 142 36 
Total Modified EBITDA of reportable segments
$3,720 $2,028 $1,238 $311 $7,297 
Reconciliation of Modified EBITDA:
Contributions from upstream operations, corporate, and other business activities
376 
Depreciation, depletion, and amortization expenses(2,347)
Equity earnings (losses)760 
Other investing income (loss) - net42 
Interest expense(1,442)
Accretion expense associated with AROs for nonregulated operations
(96)
Proportional Modified EBITDA of equity-method investments(965)
Income (loss) before income taxes$3,625 
Equity-method investments by reportable segment$512 $3,236 $460 $292 $4,500 
Other equity-method investments18 
Total equity-method investments$4,518 
Segment assets$26,515 $12,533 $12,398 $317 $51,763 
Total current assets3,244 
Regulatory assets, deferred charges, and other
2,011 
Assets of upstream operations, corporate, and other business activities1,555 
Total assets$58,573 
Additions to long-lived segment assets$3,845 $209 $1,067 $$5,122 
Additions to long-lived assets of upstream operations, corporate, and other business activities302 
Total additions to long-lived assets$5,424 
Transmission, Power & GulfNortheast G&PWest
Gas & NGL Marketing Services (1)
Total
(Millions)
2024
Segment revenues:
Service revenues
External$4,157 $1,900 $1,558 $— $7,615 
Internal89 13 160 — 262 
Total service revenues4,246 1,913 1,718 — 7,877 
Total service revenues – commodity consideration54 78 — 134 
Product sales
External144 24 178 2,500 2,846 
Internal184 86 691 (448)513 
Total product sales328 110 869 2,052 3,359 
Net gain (loss) from commodity derivatives
Realized— — 72 76 
Unrealized— — — (335)(335)
Total net gain (loss) from commodity derivatives (2)— — (263)(259)
Total revenues of reportable segments
$4,628 $2,025 $2,669 $1,789 $11,111 
Reconciliation of revenues:
Revenues from upstream operations, corporate, and other business activities470 
Net unrealized gain (loss) from commodity derivatives for upstream operations(26)
Eliminations(1,052)
Total consolidated revenues$10,503 
Segment costs and expenses and Proportional Modified EBITDA of equity-method investments:
Product costs and net realized processing commodity expenses(329)(88)(844)(1,799)
Net unrealized gain (loss) from commodity derivatives within Net processing commodity expenses— — — (6)
Operating and administrative expenses (3)
(1,104)(441)(591)(108)
Recoverable power, transportation, and storage costs (4)
(250)(143)(49)— 
Other segment income (expenses) - net (5)
155 (5)— 
Proportional Modified EBITDA of equity-method investments173 602 132 — 
Total Modified EBITDA of reportable segments
$3,273 $1,958 $1,312 $(124)$6,419 
Reconciliation of Modified EBITDA:
Contributions from upstream operations, corporate, and other business activities
237 
Depreciation, depletion, and amortization expenses
(2,219)
Equity earnings (losses)560 
Other investing income (loss) - net343 
Interest expense(1,364)
Accretion expense associated with AROs for nonregulated operations
(81)
Proportional Modified EBITDA of equity-method investments(909)
Income (loss) before income taxes$2,986 
Equity-method investments by reportable segment$272 $3,346 $476 $— $4,094 
Other equity-method investments
13 
Total equity-method investments$4,107 
Segment assets$23,149 $12,918 $12,144 $46 $48,257 
Total current assets2,661 
Regulatory assets, deferred charges, and other
1,830 
Assets of upstream operations, corporate, and other business activities1,784 
Total assets$54,532 
Additions to long-lived segment assets
$4,399 $210 $529 $$5,140 
Additions to long-lived assets of upstream operations, corporate, and other business activities
458 
Total additions to long-lived assets
$5,598 
Transmission, Power & GulfNortheast G&PWest
Gas & NGL Marketing Services (1)
Total
(Millions)
2023
Segment revenues:
Service revenues
External$3,766 $1,868 $1,376 $$7,011 
Internal92 28 126 — 246 
Total service revenues3,858 1,896 1,502 7,257 
Total service revenues – commodity consideration38 103 — 146 
Product sales
External146 34 80 2,382 2,642 
Internal106 98 361 (322)243 
Total product sales252 132 441 2,060 2,885 
Net gain (loss) from commodity derivatives
Realized— 89 115 206 
Unrealized— — — 702 702 
Total net gain (loss) from commodity derivatives (2)— 89 817 908 
Total revenues of reportable segments$4,150 $2,033 $2,135 $2,878 $11,196 
Reconciliation of revenues:
Revenues from upstream operations, corporate, and other business activities505 
Net unrealized gain (loss) from commodity derivatives for upstream operations
Eliminations(795)
Total consolidated revenues$10,907 
Segment costs and expenses and Proportional Modified EBITDA of equity-method investments:
Product costs and net realized processing commodity expenses(259)(125)(517)(1,786)
Net unrealized gain (loss) from commodity derivatives within Net processing commodity expenses— — — (43)
Operating and administrative expenses (3)
(1,034)(424)(502)(98)
Recoverable power, transportation, and storage costs (4)
(241)(132)(37)— 
Other segment income (expenses) - net (5)118 (10)(1)
Impairment or write-off of certain assets— — (10)— 
Gain on sale of business (7)129 — — — 
Proportional Modified EBITDA of equity-method investments205 574 162 — 
Total Modified EBITDA of reportable segments
$3,068 $1,916 $1,238 $950 $7,172 
Reconciliation of Modified EBITDA:
Contributions from upstream operations, corporate, and other business activities
307 
Unallocated Net gain from Energy Transfer litigation judgment (8)534 
Depreciation, depletion, and amortization expenses
(2,071)
Equity earnings (losses)589 
Other investing income (loss) - net108 
Interest expense(1,236)
Accretion expense associated with AROs for nonregulated operations
(59)
Proportional Modified EBITDA of equity-method investments(939)
Income (loss) before income taxes
$4,405 
Equity-method investments by reportable segment$652 $3,477 $477 $— $4,606 
Other equity-method investments
Total equity-method investments$4,614 
Segment assets$19,705 $13,319 $12,188 $77 $45,289 
Total current assets4,513 
Regulatory assets, deferred charges, and other
1,573 
Assets of upstream operations, corporate, and other business activities1,252 
Total assets$52,627 
Additions to long-lived segment assets
$2,501 $340 $1,186 $$4,034 
Additions to long-lived assets of upstream operations, corporate, and other business activities
279 
Total additions to long-lived assets
$4,313 
_______________________
(1)    As Williams is acting as agent for natural gas marketing customers or engages in energy trading activities, the resulting revenues are presented net of the related costs of those activities.
(2)    Williams records transactions that qualify as commodity derivatives at fair value with changes in fair value recognized in earnings in the period of change and characterized as unrealized gains or losses. Gains and losses from commodity derivatives held for energy trading purposes are presented on a net basis in revenue.
(3)    Segment operating and administrative expenses primarily include payroll, maintenance and operating costs and taxes, and general and administrative expenses, including acquisition and transition-related expenses. It also includes project execution, information technology, finance and accounting, real estate and aviation, central engineering services, safety and operational discipline, supply chain and digital transformation, corporate strategic development, human resources, legal and government affairs, and executive and audit support services costs which are centrally managed and allocated to segments.
(4)    Recoverable power, transportation and storage costs are charges incurred which are reimbursable pursuant to FERC stipulations or customer contracts.
(5)    Other segment income (expenses) primarily includes equity AFUDC and regulatory credits and charges related to Williams’ regulated operations.
(6)    Impairment or write-off of certain assets primarily includes a $25 million write-off of certain compression assets within the West segment in September 2025 and a $176 million impairment of certain gas gathering assets within the West segment in December 2025 (Note 16 – Fair Value Measurements, Guarantees, and Concentration of Credit Risk).
(7)    Gain on sale of business reflects a gain recognized on the sale of certain liquids pipelines in the Gulf Coast region in September 2023 (Note 3 – Acquisitions and Divestitures).
(8)    Net gain from Energy Transfer litigation judgment resulted from a favorable ruling in November 2023 (Note 1 – Description of Business, Basis of Presentation, and Summary of Significant Accounting Policies).
Transco
Transco manages and evaluates its business as a single reportable segment. Transco’s CODM is the Senior Vice President, Transmission, Power & Gulf. Transco’s CODM determines resource allocation, measures and evaluates segment operating performance based upon Net income (loss) as reported on the Statement of Net Income.
Significant expenses within net income include Operating and maintenance expenses and General and administrative expenses, which are each separately presented on Transco’s Statement of Net Income. Other segment items within net income include natural gas product costs; depreciation and amortization expenses; taxes, other than income taxes; interest expense; interest income; other income (expense) – net; and AFUDC.
Transco’s segment assets include Property, plant, and equipment – net as presented on the Balance Sheet.
NWP
NWP manages and evaluates its business as a single reportable segment. NWP’s CODM is the Senior Vice President, Transmission, Power & Gulf. NWP’s CODM determines resource allocation, measures and evaluates segment operating performance based upon Net income (loss) as reported on the Statement of Net Income.
Significant expenses within net income include Operating and maintenance expenses and General and administrative expenses, which are each separately presented on NWP’s Statement of Net Income. Other segment items within net income include depreciation and amortization expenses; taxes, other than income taxes; interest expense; other income (expense) – net; and AFUDC.
NWP’s segment assets include Property, plant, and equipment – net as presented on the Balance Sheet.

Historical Timeline

Fiscal YearFiled
2025Feb 24, 2026Showing above
2024Feb 25, 2025
2023Feb 21, 2024
2022Feb 27, 2023
2021Feb 28, 2022
2020Feb 24, 2021
2019Feb 24, 2020
2018Feb 21, 2019
2017Feb 22, 2018
2016Feb 22, 2017
2015Feb 26, 2016

About Segments Disclosures

Segment disclosures break a company into its reportable operating units, revealing revenue, profit, and asset allocation that consolidated financial statements obscure. Under ASC 280, segments must match how the chief operating decision maker views the business, providing a window into internal management structure and resource allocation priorities.

Key signals: compare segment margins to identify which units drive profitability and which destroy value. Watch for changes in the number of reportable segments — segment aggregation or disaggregation often coincides with strategic shifts or attempts to obscure declining performance. Intersegment elimination patterns reveal internal pricing practices. The reconciliation between segment totals and consolidated figures exposes corporate overhead allocation and unallocated items. Geographic revenue concentration highlights regulatory and currency exposure. Compare segment-level capital expenditure against segment revenue to assess where management is investing for future growth versus harvesting existing assets.