Oklahoma Top Companies List by Market Cap as of August 2026

Williams Companies is an energy infrastructure company focused on connecting North America’s significant hydrocarbon resource plays to growing markets for natural gas and natural gas liquids (NGLs). Williams’ interstate gas pipeline and gathering & processing operations span the United States, including strategic assets in the deep water Gulf of Mexico, the Rockies, the Pacific Northwest and the Eastern Seaboard.

Williams owns and operates midstream gathering and processing assets, and interstate natural gas pipelines.

ONEOK is Natural Gas Processing, transmission and Distribution ( Gas Utility ) company with headquarters is in Oklahoma, USA.

As on 2022, ONEOK has 2,966 employees.

ONEOK annual revenue generated for period ending Dec-2022 was 22,386 million USD.

ONEOK annual net income generated for period ending Dec-2022 was 1,721 million USD.

Oil and Gas Exploration and Production company with headquarters is in Oklahoma, USA.

Halliburton is oil fields services company with headquarters is in Texas, USA.

As on 2022, Halliburton has 42,172 employees.

Halliburton annual revenue generated for period ending Dec-2022 was 20,297 million USD.

Halliburton annual net income generated for period ending Dec-2022 was 1,572 million USD.

Oil and Gas exploration and production company with headquarters is in USA. is the largest leaseholder and the largest producer in the nation’s premier oil field, the Bakken play of North Dakota and Montana. The Company also has significant positions in the SCOOP and STACK plays of the Anadarko Basin of Oklahoma and newly acquired positions in the Powder River Basin of Wyoming and Permian Basin of Texas.
It is the most efficient and cost-effective producers of oil and natural gas on the planet.
CONTINENTAL RESOURCES total number of employees in Dec-2021 was 1,254.

Chesapeake Energy Corporation is a Gas Industry company. It is a value driven strategy focuses on continuously generating capital efficiencies and operating with low, industry leading production and G&A costs along with a disciplined approach to liquidity. The headquarters is in USA.

Chesapeake Energy Corporation total number of employees in Dec- 2022 was 1,300.

Chesapeake Energy Corporation annual revenue generated for period ending Dec-2022 was 11,443 million USD.

Magellan Midstream Partners company provides Fund management services and investment management services. Headquarters is in Australia.

On Sep-25-2023, ONEOK announced that it has completed its acquisition of Magellan Midstream Partners.

Paycom Software is Software products and services company with headquarters is in Oklahoma, USA.

As on 2022, Paycom Software has 6,300 employees.

Paycom Software annual revenue generated for period ending Dec-2022 was 1,375 million USD.

Paycom Software annual net income generated for period ending Dec-2022 was 281 million USD.

Gas and Electricity Utility company with headquarters is in Oklahoma, USA.

BOK Financial Corporation is a Banking services company. The headquarters is in USA.