Houston calls itself the Energy Capital of the World, and the numbers back it up. The metro area is home to more than 5,000 energy-related companies, spanning everything from oil majors to renewable developers to pipeline operators.
A Fortune 500 Powerhouse
The 2026 Fortune 500 list includes 27 companies headquartered in the Houston area — tying the city with Chicago for the second-most Fortune 500 headquarters in the country, behind only New York City. Fourteen of those are energy companies. The count is set to grow: Expand Energy announced in 2026 that it is relocating its headquarters from Oklahoma to Spring, Texas, just outside Houston.
The Refining and Pipeline Backbone
Houston-area companies operate a large share of the nation’s natural gas pipeline network and account for about 15.3% of total U.S. oil refining capacity on their own. Texas as a whole refines more than 5.1 million barrels of oil per day — roughly 29% of total U.S. refining capacity, more than any other state.
Why It Matters for Energy Markets
That concentration of refining, pipeline, and corporate infrastructure makes Houston a physical and financial hub for U.S. energy markets — decisions made in Houston boardrooms and trading desks ripple through natural gas, power, and fuel markets nationwide.
Figures compiled from Houston.org, the Texas Governor’s Office, and 2026 Fortune 500 reporting. See our Data Sources & Disclaimers page for sourcing details.