Houston lands 27 Fortune 500 headquarters, led by energy heavyweights

HQ leader

Houston is tied with Chicago for the second-most Fortune 500 headquarters. Photo via Getty Images

Editor's note: This article has been updated to correct the number of companies based in the Dallas-Fort Worth area.

Houston is a giant among U.S. hubs for corporate headquarters.

The 2026 Fortune 500 lists 27 companies based in the Houston area, with many energy companies claiming top spots. Houston ties with Chicago for the second-most Fortune 500 headquarters, preceded only by New York City (53). Dallas-Fort Worth is home to 24 Fortune 500 headquarters.

Texas leads the nation for Fortune 500 headquarters (57), with California in the No. 2 spot and New York at No. 3.

“Texas is the undisputed headquarters of headquarters,” Gov. Greg Abbott said in a news release. “The world’s leading businesses invest with confidence in Texas because of our welcoming business climate, predictable regulatory environment, and skilled and growing workforce. People and businesses are choosing Texas because Texas works.”

The 2026 Fortune 500 ranks the largest U.S. corporations based on revenue in fiscal year 2025.

Here’s a rundown of the 27 Fortune 500 companies based in the Houston area.

No. 9 ExxonMobil
No. 21 Chevron
No. 29 Phillips 66
No.55 Sysco
No. 75 ConocoPhillips
No. 89 Enterprise Products Partners
No. 103 Plains GP Holdings
No. 133 Hewlett Packard Enterprise
No. 149 NRG Energy
No. 157 Quanta Services
No. 164 Baker Hughes
No. 173 Occidental Petroleum
No. 179 Waste Management
No. 201 EOG Resources
No. 204 Group 1 Automotive
No. 207 Halliburton
No. 223 Cheniere Energy
No. 236 Corebridge Financial
No. 262 Targa Resources
No. 266 Kinder Morgan
No. 388 Westlake
No. 435 CenterPoint Energy
No. 438 APA
No. 440 Comfort Systems USA
No. 455 NOV
No. 488 KBR
No. 496 Coterra Energy. Oklahoma City, Oklahoma-based Devon Energy and Houston-based Coterra Energy merged in early May, with the combined company retaining the Devon Energy name and the Houston headquarters.

The Greater Houston Partnership notes the Houston area soon will welcome its 28th Fortune 500 company. Expand Energy (formerly Chesapeake Energy), appearing at No. 362 on the 2026 list, says it’s moving its headquarters from Oklahoma City to Spring this year.

As the natural gas producer prepares to relocate to Texas, it’s hunting for a new leader. Nick Dell’Osso stepped down as president and CEO earlier this year. Board Chairman Michael Wichterich is interim president and CEO.

Dell’Osso became president and CEO of Oklahoma City-based Gulfport Energy effective May 28.

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VoltaGrid has developed a modular power generation system that improves reliability and limits emissions. Photo via voltagrid.com

Houston startup lands $1B from Blackstone and Halliburton, plans acquisition

power deal

Houston-based power generation startup VoltaGrid has nailed down a $1 billion equity investment from asset management heavyweight Blackstone and Houston-based oilfield services provider Halliburton.

The investment comes in two forms:

A $775 million primary capital raise
A $225 million secondary capital purchase from existing investors

VoltaGrid, founded in 2020, provides behind-the-meter mobile power generation equipment for data centers, microgrids and industrial customers.

Aside from the $1 billion investment, VoltaGrid has agreed to buy Propell Energy Technology, a VoltaGrid supplier, for an undisclosed amount. Propell offers a natural gas power generation platform for AI data centers. VoltaGrid plans to add two manufacturing plants at Propell’s facilities in Granbury, a Dallas-Fort Worth suburb.

The investment and acquisition deals are expected to close in mid-2026.

Funds managed by Blackstone Tactical Opportunities are contributing to the $1 billion investment. William Nicholson, managing director of Blackstone, called VoltaGrid “a highly differentiated platform addressing one of the most important infrastructure needs of the AI era: reliable, rapidly deployable power. This investment is a strong example of Tac Opps’ focus on providing flexible, scaled capital to exceptional entrepreneurs and businesses operating in Blackstone’s highest-conviction investment themes.”

Nathan Ough, founder and CEO of VoltaGrid, said in a release that the Blackstone investment “is a powerful endorsement of the platform we have built and the role VoltaGrid is playing in delivering the energy infrastructure of the AI era.”

Last October, VoltaGrid and Halliburton said they had forged a partnership to supply power for data centers around the world, with the Middle East picked as the initial target. Two months later, the companies said they had arranged the manufacturing of 400 megawatts of natural gas power systems that’ll be delivered in 2028 to support new data centers in the Eastern Hemisphere.

Jeff Miller, president and CEO of Halliburton, said his company’s investment in VoltaGrid “reflects our shared focus on long-term solutions for the world’s most demanding power environments, and advances VoltaGrid’s ability to deliver reliable, distributed power at scale.”

Twenty-six Houston-area companies landed on the latest Fortune 500 list. Photo via Getty Images

Houston earns No. 3 spot among cities with most Fortune 500 headquarters

biggest companies

Houston maintained its No. 3 status this year among U.S. metro areas with the most Fortune 500 headquarters. Fortune magazine tallied 26 Fortune 500 headquarters in the Houston area, behind only the New York City area (62) and the Chicago area (30).

Last year, 23 Houston-area companies landed on the Fortune 500 list. Fortune bases the list on revenue that a public or private company earns during its 2024 budget year.

On the Fortune 500 list for 2025, Spring-based ExxonMobil remained the highest-ranked company based in the Houston area as well as in Texas, sitting at No. 8 nationally. That’s down one spot from its No. 7 perch on the 2024 list. During its 2024 budget year, ExxonMobil reported revenue of $349.6 billion, up from $344.6 billion the previous year.

Here are the rankings and 2024 revenue for the 25 other Houston-area companies that made this year’s Fortune 500:

No. 16 Chevron, $202.8 billion
No. 28 Phillips 66, $145.5 billion
No. 56 Sysco, $78.8 billion
No. 75 Conoco Phillips, $56.9 million
No. 78 Enterprise Products Partners, $56.2 billion
No. 92 Plains GP Holdings, $50 billion
No. 143 Hewlett-Packard Enterprise, $30.1 billion
No. 153 NRG Energy, $28.1 billion
No. 155 Baker Hughes, $27.8 billion
No. 159 Occidental Petroleum, $26.9 billion
No. 183 EOG Resources, $23.7 billion
No. 184 Quanta Services, $23.7 billion
No. 194 Halliburton, $23 billion
No. 197 Waste Management, $22.1 billion
No. 214 Group 1 Automotive, $19.9 billion
No. 224 Corebridge Financial, $18.8 billion
No. 256 Targa Resources, $16.4 billion
No. 275 Cheniere Energy, $15.7 billion
No. 289 Kinder Morgan, $15.1 billion
No. 345 Westlake Corp., $12.1 billion
No. 422 APA, $9.7 billion
No. 443 NOV, $8.9 billion
No. 450 CenterPoint Energy, $8.6 billion
No. 474 Par Pacific Holdings, $8 billion
No. 480 KBR Inc., $7.7 billion

Nationally, the top five Fortune 500 companies are:

Walmart
Amazon
UnitedHealth Group
Apple
CVS Health

“The Fortune 500 is a literal roadmap to the rise and fall of markets, a reliable playbook of the world's most important regions, services, and products, and an indispensable roster of those companies' dynamic leaders,” Anastasia Nyrkovskaya, CEO of Fortune Media, said in a news release.

Among the states, Texas ranks second for the number of Fortune 500 headquarters (54), preceded by California (58) and followed by New York (53).

Envana Software Solutions' tech allows an oil and gas company to see a full inventory of greenhouse gases. Photo via Getty Images

Houston joint venture secures $5.2M for AI-powered methane tracking tech

fresh funds

Houston-based Envana Software Solutions has received more than $5.2 million in federal and non-federal funding to support the development of technology for the oil and gas sector to monitor and reduce methane emissions.

Thanks to the work backed by the new funding, Envana says its suite of emissions management software will become the industry's first technology to allow an oil and gas company to obtain a full inventory of greenhouse gases.

The funding comes from a more than $4.2 million grant from the U.S. Department of Energy (DOE) and more than $1 million in non-federal funding.

“Methane is many times more potent than carbon dioxide and is responsible for approximately one-third of the warming from greenhouse gases occurring today,” Brad Crabtree, assistant secretary at DOE, said in 2024.

With the funding, Envana will expand artificial intelligence (AI) and physics-based models to help detect and track methane emissions at oil and gas facilities.

“We’re excited to strengthen our position as a leader in emissions and carbon management by integrating critical scientific and operational capabilities. These advancements will empower operators to achieve their methane mitigation targets, fulfill their sustainability objectives, and uphold their ESG commitments with greater efficiency and impact,” says Nagaraj Srinivasan, co-lead director of Envana.

In conjunction with this newly funded project, Envana will team up with universities and industry associations in Texas to:

Advance work on the mitigation of methane emissions
Set up internship programs
Boost workforce development
Promote environmental causes

Envana, a software-as-a-service (SaaS) startup, provides emissions management technology to forecast, track, measure and report industrial data for greenhouse gas emissions.

Founded in 2023, Envana is a joint venture between Houston-based Halliburton, a provider of products and services for the energy industry, and New York City-based Siguler Guff, a private equity firm. Siguler Gulf maintains an office in Houston.

“Envana provides breakthrough SaaS emissions management solutions and is the latest example of how innovation adds to sustainability in the oil and gas industry,” Rami Yassine, a senior vice president at Halliburton, said when the joint venture was announced.

Halliburton Labs has named its latest cohort. Photo courtesy of Halliburton

Halliburton names 5 clean energy startups to latest incubator cohort

clean team

Halliburton Labs has named five companies to its latest cohort, including one from Texas.

All of the companies are working to help accelerate the future of the energy industry in different ways. The incubator aims to advance the companies’ commercialization with support from Halliburton's network, facilities and financing opportunities.

The five new members include:

360 Energy, an Austin-based in-field computing company with technology that is able to capture flared or stranded gas and monetize it through modular data centers
Cella, a New York-based mineral storage company that provides end-to-end services, from resource assessment to proprietary injection technology, and monitoring techniques to provide geologic carbon storage solutions
Espiku, an engineering services company based in Bend, Oregon, that finds solutions that advance water and minerals recovery from brines and industrial-produced water streams
Mitico, based in Los Angeles, that offers technology services to capture carbon dioxide by using its patent-pending granulated metal carbonate sorption technology (GMC) that captures more than 95% of the CO2 emitted from post-combustion point sources
NuCube, a Pasadena, California-based company with a nuclear fission reactor under development

“We welcome these innovative energy startups,” Dale Winger, managing director of Halliburton Labs, said in a news release. “We are eager to help these participant companies use their time and capital efficiently to progress new solutions that meet industry requirements for cost, reliability, and sustainability.”

Halliburton Labs also announced that it will host the Finalists Pitch Day on March 26, 2025, in Denver for energy and decarbonization industry innovators, startups and investors ahead of the National Renewable Energy Laboratory (NREL) Industry Growth Forum. The pitch event will precede registration and the opening reception of the NREL forum. Find more information here.

Adena Power, an Ohio-based clean energy startup, was the latest to join Halliburton Labs prior to the new cohort. The company used three patented materials to produce a sodium-based battery that delivers clean, safe and long-lasting energy storage.

The incubator also named San Francisco-based venture capital investor Pulakesh Mukherjee, partner at Imperative Ventures, which specializes in hard tech decarbonization startups, to its advisory board last spring.

Read more about the incubator's 2023 cohort here.

Adena Power uses three patented materials to produce a sodium-based battery that delivers clean, safe, long-lasting energy storage. Photo via adenapower.com

Sodium-based battery startup joins Halliburton Labs

new cohort co.

An Ohio-based clean energy startup has joined Houston-based Halliburton Labs, an incubator for early-stage energy tech companies.

Adena Power uses three patented materials to produce a sodium-based battery that delivers clean, safe, long-lasting energy storage. The startup is trying to capitalize on the 100 terawatt-hour potential for energy storage in the U.S. grid.

“With Halliburton Labs’ support and operational expertise, Adena Power looks to accelerate scaling and take advantage of the high-growth market opportunity,” Nathan Cooley, co-founder and CEO of Adena Power, says in a news release.

Adena, founded in 2022, supplies energy storage batteries for the commercial, industrial, and utility sectors. The startup has collected funding from four investors, according to PitchBook: OhioXcelerate, Third Derivative, BRITE Energy Innovators, and For ClimateTech.

Adena’s addition to Halliburton Labs comes during a momentous year for the company. For example:

Adena won the People’s Choice Award at the National Renewable Energy Labs Industry Growth Forum.
Adena earned the MAKE IT (Manufacture of Advanced Key Energy Infrastructure Technologies) Prize from the U.S. Department of Energy.

“Our team is ready to collaborate with Adena to help them accelerate their growth to meet the demand for behind-the-meter storage solutions,” says Dale Winger, managing director of Halliburton Labs.

Halliburton Labs is a wholly owned subsidiary of Halliburton, a provider of products and services for the energy industry. The incubator will have pitches at the inaugural Houston Energy and Climate Startup Week next month.

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New Houston energy startup launches to power AI data centers

power move

Buoyed by a purchase agreement from Microsoft, Houston-based Joulent recently launched to build power plants that meet the electricity demands of AI data centers and other computing-heavy industries.

Joulent builds dedicated power-generating facilities that feed directly into data centers and other power-dependent facilities, eliminating the need for companies to siphon power from grids. Joulent’s plants combine generation, storage and smart controls in a modular, scalable setup, according to a news release.

Investment firm Engine No. 1 established Joulent in collaboration with energy technology company GE Vernova.

Joulent’s first project, the Project Kilby natural gas facility in West Texas, will be co-located with a Microsoft data center. It’ll deliver about 2.67 gigawatts of power under a 20-year deal between Microsoft and Energy Forge One, a subsidiary of Houston-based Chevron. Engine No. 1 and Chevron teamed up to build the plant.

GE Vernova will supply most of the plant’s power capacity, with additional capacity coming from Solar Turbines, a subsidiary of Irving-based construction and mining equipment manufacturer Caterpillar.

“Leadership in the AI era will be determined by who can deliver energy and compute the fastest, most reliably, and at the lowest cost,” Chris James, founder and CEO of Engine No. 1 and Joulent, said in a news release. “By building new power-generating facilities, Joulent enables customers across industries to power the next chapter of American innovation, while reducing pressure on existing grids and maintaining affordability for ratepayers.”

6 Houston greentech cos. named world's best & more top energy headlines

Trending News

Editor's note: Summer is heating up with big news in the energy transition sector, from Time's World's Top GreenTech Companies of 2026 to ExxonMobil's new Texas legal HQ. Below are the five most-read EnergyCapitalHTX stories published June 15-30, 2026:

1. 6 Houston companies earn recognition on Time’s global greentech list 2026

Six Houston-area businesses appear on Time magazine’s 2026 list of the world’s top greentech companies, with a high-flying name leading the pack. The highest-ranked local company is Houston-based geothermal power producer Fervo Energy, which claims the No. 4 spot—up from No. 14 last year. Continue reading.

2. Houston-based Syzygy lands global customer for first commercial SAF plant

Houston-based Syzygy lands global customer for first commercial SAF plant

Houston-based Syzygy Plasmonics has secured a major future customer for its sustainable aviation fuel. Syzygy has entered into a capacity reservation agreement with World Fuel Services, a global fuel distribution and logistics company. Through the deal, World Fuel has reserved a portion of Syzygy's SAF production for future plants slated for Central and South America. The clean fuel will be produced at Syzygy’s NovaSAF-1 facility in Uruguay, which is moving toward construction. Continue reading.

3. Fervo promotes strategy leader to COO as flagship geothermal project nears launch

Houston geothermal unicorn Fervo Energy has named Sarah Jewett as its new COO. Jewett steps into the role as the company prepares for its flagship Cape Station geothermal project to deliver its first power later this year. Jewett joined Fervo in 2020 as director of strategy and most recently served as the company's senior vice president of strategy. Continue reading.

4. UH study finds Gulf Coast best positioned for emerging carbon removal technology

The Gulf Coast is an ideal spot for deploying a new ocean-based carbon removal technology that uses seawater to capture and store carbon dioxide, according to a new study from the University of Houston. The study was led by UH Cullen College of Engineering Professor Mim Rahimi and published in Nature’s Communications Sustainability journal. Abdelrahman Refaie, a PhD student at UH, authored the paper. It aimed to develop a plan for implementing an electrochemical marine carbon dioxide removal (e-mCDR) technology that treats seawater to increase the ocean’s ability to absorb and store carbon dioxide from the air. Continue reading.

5. ExxonMobil announces date to move legal headquarters to Texas

Energy giant Exxon Mobil Corp. has set a date to move its legal headquarters to Texas. The Spring-based company announced that the redomiciliation from New Jersey to Texas is expected to be effective July 1. Exxon's board of directors unanimously recommended redomiciling in the Lone Star State in March, and shareholders approved the move to Texas at the company’s annual meeting in May. Continue reading.

Baker Hughes signs deal to install 500 MW of geothermal power

geothermal growth

Baker Hughes has made a deal to further expand its geothermal operations.

The Houston-based energy giant has signed an agreement with Mantle Reach Power to develop geothermal energy projects across North America. The companies say they aim to install up to 500 megawatts of geothermal power in the next five years, according to a news release.

Through the new agreement, Baker Hughes will provide subsurface technology and solutions while Mantle Reach Power will lead project development, ownership and financing. Mantle Reach Power is a geothermal development company backed by the $47 billion EnCap Energy Transition Fund III.

According to the release, the deal aims to help solve one of geothermal energy's fundamental problems by aligning capital with expertise and technology, and enhancing "pre-construction bankability."

“Geothermal is a clean power solution that is proving to be a vital contributor to advancing sustainable energy development, with incredible potential to enhance U.S. energy security, support digital infrastructure, and ensure energy remains accessible and affordable ... Today’s announcement celebrates the commercial architecture the industry has been missing: a repeatable, financeable model that can be deployed at the speed and scale to meet global energy demands,” Baker Hughes Chairman and CEO Lorenzo Simonelli said in the news release.

“Integrating Baker Hughes’ subsurface-to-surface expertise with our capabilities in project development, finance, and execution positions Mantle Reach Power to commercialize geothermal assets at scale,” Nick Karambelas, CEO of Mantle Reach Power, added in the release. “This structure provides the construction and operating certainty necessary to access conventional project financing and accelerate our growth as an independent power producer.”

Baker Hughes has launched multiple geothermal partnerships in recent months. The company announced a deal with Oklahoma-based Helmerich & Payne Inc. (H&P) in May to develop a geothermal rig, where H&P will provide a geothermal-capable land drilling rig and Baker Hughes will contribute technology.

In March, the company announced support for XGS’s geothermal extraction projects in New Mexico, which are being used to meet the increasing demands of data centers in the state. Last year, Fervo Energy selected Baker Hughes to supply equipment for its flagship geothermal project in Utah.

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