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The Williams Companies, Inc. (WMB) is an energy company in the additional transport and holding operations industry, based in Tulsa, United States, with about 5,987 full-time employees.
Its largest business segment, Transmission, Power & Gulf, brought in 41% of segment revenue in fiscal year 2025. Its market capitalization was $88.89 billion as of October 9, 2026.
Figures from company filings and market data; latest fiscal year ended December 31, 2024; market data as of October 9, 2026.
, together with its subsidiaries, operates as an energy infrastructure company primarily in the United States. It operates through Transmission, Power & Gulf, Northeast G&P, West, and Gas & NGL Marketing Services segments.
Transmission, Power & Gulf, with $5.44 billion or 41% of segment revenue in fiscal year 2025. Next: West (22%) and Northeast G&P (16%).
$88.89 billion as of October 9, 2026.
Listed companies of a similar size in the same industry (additional transport and holding operations) include Enterprise Products Partners L.p. (EPD), Energy Transfer LP (ET), Cheniere Energy, Inc. (LNG), Mplx LP (MPLX).