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

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).

EDP Renewables North America LLC has announced four new solar projects in Texas, Mississippi and Illinois for major tech customers. Photo via Getty Images

Houston renewables developer powers 4 new solar parks for Amazon, Microsoft

now open

Houston-based EDP Renewables North America LLC announced that it has powered up four new projects across the country for customers Amazon and Microsoft.

The new projects come about a month after EDP Renewables powered up its new California solar park for Houston-based Shell Energy North America and the Eureka, California-based Redwood Coast Energy Authority.

EDP Renewables announced that it also launched the 100-megawatt Ragsdale Solar Park in Madison Country, Mississippi, in Q4 2024. Amazon has contracted for all 100 megawatts from the solar park through a 15-year power agreement.

The Ragsdale project is the company's second utility-scale project in Mississippi after EDP Renewables launched its Pearl River Solar Park last year.

“Ragsdale signifies EDP Renewables’ ongoing commitment to Mississippi, its communities, and local businesses. The opportunity to develop utility-scale solar and contract directly with customers like Amazon, who are also committed to expanding their own presence in Mississippi, has been invaluable," Sandhya Ganapathy, CEO of EDP Renewables North America, said in a statement. "We are proud to aid the state’s commercial and industrial growth with homegrown energy solutions."

Additionally, EDP Renewables has powered three new projects for tech-giant Microsoft, with two in Illinois and one in Texas.

In December EDP Renewables powered a 150-megawatt Cattlemen II Solar Project in Milam County, Texas, about 70 miles northeast of the Austin area. It joins the 240-megawatt Cattlemen I Solar Park, which came online a year prior.

The company also launched the 140-megawatt Wolf Run Solar Project near Jacksonville, Illinois, and the Hickory Solar Project in Jerseyville, Illinois, late last year. The Hickory project was developed in conjunction with D.C.-based Volt Energy Utility.

Microsoft has agreed to purchase 389 megawatts and renewable energy credits from the projects, which brings the portfolio between the two companies up to five projects in total. It also includes the Timber Road IV Wind Farm located in Payne, Ohio.

"The importance of ensuring benefits flowing from renewable energy development directly into communities has never been more important,” Ganapathy added in a statement. “Through these three additional projects, we’re keeping our promise – and indeed the industry’s promise – to contribute to the nation’s growing energy demand and in that process invest in long-lasting economic growth of our communities.”

Events not to miss, nomination deadline for awards program for innovative energy businesses, and more things to know this week. Photo via Getty Images

Calling all energy startups, Amazon enters the DAC chat, and more things to know this week

hou knew?

Editor's note: It's a new week — start it strong with three quick things to know in Houston's energy transition ecosystem. Submit an energy transition company to an awards program, read how Amazon entered the DAC conversation, and learn about events not to miss this week.

Houston Innovation Awards nominations coming to a close

Photo via Getty Images

If you haven't heard, EnergyCapital's sister site, InnovationMap, is accepting nominations for the 2023 Houston Innovation Awards. The deadline to submit is tomorrow, September 19, and there are several categories that might be of interest to the Houston energy transition ecosystem, such as:

  • Hardtech Business, honoring an innovative company developing and commercializing a physical technology
  • Digital Solutions Business, honoring an innovative company developing and programming a digital solution to a problem in an industry
  • Sustainability Business, honoring an innovative company providing a solution within renewables, climatetech, clean energy, alternative materials, circular economy, and beyond
  • Corporate of the Year, honoring a corporation that supports startups and/or the Houston innovation community
  • People's Choice: Startup of the Year, selected via an interactive voting portal during the event
Now, these are only a few categories this year. To submit a nomination and read more about the awards, click here.

Events to have on your radar

Photo courtesy of The Cannon

  • September 21 — The Rice Alliance Energy Tech Venture Forum is an opportunity to learn about the latest emerging technologies, meet investors to seek funding, see promising companies, and more. (Note: I'm moderating a panel about venture investment at 2 pm)
  • September 21 — UH Energy Symposium, a panel series, is hosting its next installment, entitled Plastics, Chemicals, Circularity: What's Next?
  • September 28 — Chevron Technology Ventures seeks to identify novel technologies and innovation systems that stand to transform and improve facility-focused operational efficiencies, via the Chevron Technology Ventures Pitch Competition. Six Houston companies will compete to win a tailored field trial opportunity with CTV experts, plus a six-month, complimentary, flexible-workspace membership at The Cannon.

Amazon makes investment in direct air capture by way of Houston-based Oxy

Photo via 1pointfive.com

Houston-based cleantech company 1PointFive is among the recipients of e-commerce giant Amazon’s first investments in carbon-fighting direct air capture (DAC).

Amazon has agreed to buy 250,000 metric tons of carbon removal credits from Stratos, 1PointFive’s first DAC plant, over a 10-year span. That commitment is equivalent to the amount of carbon stored naturally across more than 290,000 acres of U.S. forecasts, says Amazon.

As Amazon explains, DAC technology filters CO2 from the atmosphere and stores it in underground geological formations. Aside from being stored, removed carbon can be used to make building materials like bricks, cement, and concrete. Read more.

Amazon has agreed to buy 250,000 metric tons of carbon removal credits from 1PointFive’s first DAC plant. Photo via 1pointfive.com

Oxy's cleantech arm scores Amazon DAC investment

carbon capture client

Houston-based cleantech company 1PointFive is among the recipients of e-commerce giant Amazon’s first investments in carbon-fighting direct air capture (DAC).

Amazon has agreed to buy 250,000 metric tons of carbon removal credits from Stratos, 1PointFive’s first DAC plant, over a 10-year span. That commitment is equivalent to the amount of carbon stored naturally across more than 290,000 acres of U.S. forecasts, says Amazon.

Financial terms of the deal weren’t disclosed.

1PointFive is a carbon capture, utilization, and sequestration (CCUS) subsidiary of Houston-based energy company Occidental Petroleum.

The carbon captured for Amazon will be stored deep underground in saline aquifers — large geological rock formations that are saturated in saltwater.

As Amazon explains, DAC technology filters CO2 from the atmosphere and stores it in underground geological formations. Aside from being stored, removed carbon can be used to make building materials like bricks, cement, and concrete.

1PointFive is constructing its first DAC plant in Ector County, which is anchored by Odessa. The facility is expected to be the world’s largest DAC plant, capturing up to 500,000 tons of CO2 per year. Amazon Web Services (AWS) will provide real-time performance data for the plant.

“Amazon’s purchase and long-term contract represent a significant commitment to direct air capture as a vital carbon removal solution,” Michael Avery, president and general manager of 1PointFive, says in a news release. “We are excited to collaborate with Amazon to help them achieve their sustainability goals.”

1PointFive broke ground on the Stratos plant in April. Its project partners include British Columbia-based Carbon Engineering and Australia-based Worley. The plant is expected to be fully operational by mid-2025.

1PointFive envisions establishing more than 100 DAC facilities around the world by 2035.

The Amazon deal isn’t the only major deal for 1Point5 this summer.

In August, the U.S. Department of Energy (DOE) announced a $600 million grant for a 1PointFive-operated DAC hub that will be built in South Texas. The more than 100,000-acre hub, comprising 30 individual DAC projects, eventually may remove and store up to 30 million metric tons of CO2 per year.

Also in August, Japan’s All Nippon Airways (ANA) said it reached an agreement with 1PointFive to buy 10,000 metric tons of carbon removal credits per year over a three-year period starting in 2025. The credits will be generated by 1PointFive’s Stratos plant.

In the U.S., DAC has gotten a huge boost from the federal government. The Inflation Reduction Act, passed in 2022, includes tax credits for capturing and storing carbon via DAC.

The International Energy Agency says 27 DAC plants have been commissioned around the world, with at least 130 more in the development stage. One forecast predicts the value of the global market for DAC systems will climb past $2.3 billion by 2030.

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Rice research team's study keeps CO2-to-fuel devices running 50 times longer

new findings

In a new study published in the journal Science, a team of Rice University researchers shared findings on how acid bubbles can improve the stability of electrochemical devices that convert carbon dioxide into useful fuels and chemicals.

The team led by Rice associate professor Hoatian Wang addressed an issue in the performance and stability of CO2 reduction systems. The gas flow channels in the systems often clog due to salt buildup, reducing efficiency and causing the devices to fail prematurely after about 80 hours of operation.

“Salt precipitation blocks CO2 transport and floods the gas diffusion electrode, which leads to performance failure,” Wang said in a news release. “This typically happens within a few hundred hours, which is far from commercial viability.”

By using an acid-humidified CO2 technique, the team was able to extend the operational life of a CO2 reduction system more than 50-fold, demonstrating more than 4,500 hours of stable operation in a scaled-up reactor.

The Rice team made a simple swap with a significant impact. Instead of using water to humidify the CO2 gas input into the reactor, the team bubbled the gas through an acid solution such as hydrochloric, formic or acetic acid. This process made more soluble salt formations that did not crystallize or block the channels.

The process has major implications for an emerging green technology known as electrochemical CO2 reduction, or CO2RR, that transforms climate-warming CO2 into products like carbon monoxide, ethylene, or alcohols. The products can be further refined into fuels or feedstocks.

“Using the traditional method of water-humidified CO2 could lead to salt formation in the cathode gas flow channels,” Shaoyun Hao, postdoctoral research associate in chemical and biomolecular engineering at Rice and co-first author, explained in the news release. “We hypothesized — and confirmed — that acid vapor could dissolve the salt and convert the low solubility KHCO3 into salt with higher solubility, thus shifting the solubility balance just enough to avoid clogging without affecting catalyst performance.”

The Rice team believes the work can lead to more scalable CO2 electrolyzers, which is vital if the technology is to be deployed at industrial scales as part of carbon capture and utilization strategies. Since the approach itself is relatively simple, it could lead to a more cost-effective and efficient solution. It also worked well with multiple catalyst types, including zinc oxide, copper oxide and bismuth oxide, which are allo used to target different CO2RR products.

“Our method addresses a long-standing obstacle with a low-cost, easily implementable solution,” Ahmad Elgazzar, co-first author and graduate student in chemical and biomolecular engineering at Rice, added in the release. “It’s a step toward making carbon utilization technologies more commercially viable and more sustainable.”

A team led by Wang and in collaboration with researchers from the University of Houston also shared findings on salt precipitation buildup and CO2RR in a recent edition of the journal Nature Energy. Read more here.

The case for smarter CUI inspections in the energy sector

Guest Column

Corrosion under insulation (CUI) accounts for roughly 60% of pipeline leaks in the U.S. oil and gas sector. Yet many operators still rely on outdated inspection methods that are slow, risky, and economically unsustainable.

This year, widespread budget cuts and layoffs across the sector are forcing refineries to do more with less. Efficiency is no longer a goal; it’s a mandate. The challenge: how to maintain safety and reliability without overextending resources?

Fortunately, a new generation of technologies is gaining traction in the oil and gas industry, offering operators faster, safer, and more cost-effective ways to identify and mitigate CUI.

Hidden cost of corrosion

Corrosion is a pervasive threat, with CUI posing the greatest risk to refinery operations. Insulation conceals damage until it becomes severe, making detection difficult and ultimately leading to failure. NACE International estimates the annual cost of corrosion in the U.S. at $276 billion.

Compounding the issue is aging infrastructure: roughly half of the nation’s 2.6 million miles of pipeline are over 50 years old. Aging infrastructure increases the urgency and the cost of inspections.

So, the question is: Are we at a breaking point or an inflection point? The answer depends largely on how quickly the industry can move beyond inspection methods that no longer match today's operational or economic realities.

Legacy methods such as insulation stripping, scaffolding, and manual NDT are slow, hazardous, and offer incomplete coverage. With maintenance budgets tightening, these methods are no longer viable.

Why traditional inspection falls short

Without question, what worked 50 years ago no longer works today. Traditional inspection methods are slow, siloed, and dangerously incomplete.

Insulation removal:

  • Disruptive and expensive.
  • Labor-intensive and time-consuming, with a high risk of process upsets and insulation damage.
  • Limited coverage. Often targets a small percentage of piping, leaving large areas unchecked.
  • Health risks: Exposes workers to hazardous materials such as asbestos or fiberglass.

Rope access and scaffolding:

  • Safety hazards. Falls from height remain a leading cause of injury.
  • Restricted time and access. Weather, fatigue, and complex layouts limit coverage and effectiveness.
  • High coordination costs. Multiple contractors, complex scheduling, and oversight, which require continuous monitoring, documentation, and compliance assurance across vendors and protocols drive up costs.

Spot checks:

  • Low detection probability. Random sampling often fails to detect localized corrosion.
  • Data gaps. Paper records and inconsistent methods hinder lifecycle asset planning.
  • Reactive, not proactive: Problems are often discovered late after damage has already occurred.

A smarter way forward

While traditional NDT methods for CUI like Pulsed Eddy Current (PEC) and Real-Time Radiography (RTR) remain valuable, the addition of robotic systems, sensors, and AI are transforming CUI inspection.

Robotic systems, sensors, and AI are reshaping how CUI inspections are conducted, reducing reliance on manual labor and enabling broader, data-rich asset visibility for better planning and decision-making.

ARIX Technologies, for example, introduced pipe-climbing robotic systems capable of full-coverage inspections of insulated pipes without the need for insulation removal. Venus, ARIX’s pipe-climbing robot, delivers full 360° CUI data across both vertical and horizontal pipe circuits — without magnets, scaffolding, or insulation removal. It captures high-resolution visuals and Pulsed Eddy Current (PEC) data simultaneously, allowing operators to review inspection video and analyze corrosion insights in one integrated workflow. This streamlines data collection, speeds up analysis, and keeps personnel out of hazardous zones — making inspections faster, safer, and far more actionable.

These integrated technology platforms are driving measurable gains:

  • Autonomous grid scanning: Delivers structured, repeatable coverage across pipe surfaces for greater inspection consistency.
  • Integrated inspection portal: Combines PEC, RTR, and video into a unified 3D visualization, streamlining analysis across inspection teams.
  • Actionable insights: Enables more confident planning and risk forecasting through digital, shareable data—not siloed or static.

Real-world results

Petromax Refining adopted ARIX’s robotic inspection systems to modernize its CUI inspections, and its results were substantial and measurable:

  • Inspection time dropped from nine months to 39 days.
  • Costs were cut by 63% compared to traditional methods.
  • Scaffolding was minimized 99%, reducing hazardous risks and labor demands.
  • Data accuracy improved, supporting more innovative maintenance planning.

Why the time is now

Energy operators face mounting pressure from all sides: aging infrastructure, constrained budgets, rising safety risks, and growing ESG expectations.

In the U.S., downstream operators are increasingly piloting drone and crawler solutions to automate inspection rounds in refineries, tank farms, and pipelines. Over 92% of oil and gas companies report that they are investing in AI or robotic technologies or have plans to invest soon to modernize operations.

The tools are here. The data is here. Smarter inspection is no longer aspirational — it’s operational. The case has been made. Petromax and others are showing what’s possible. Smarter inspection is no longer a leap but a step forward.

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Tyler Flanagan is director of service & operations at Houston-based ARIX Technologies.


Scientists warn greenhouse gas accumulation is accelerating and more extreme weather will come

Climate Report

Humans are on track to release so much greenhouse gas in less than three years that a key threshold for limiting global warming will be nearly unavoidable, according to a study released June 19.

The report predicts that society will have emitted enough carbon dioxide by early 2028 that crossing an important long-term temperature boundary will be more likely than not. The scientists calculate that by that point there will be enough of the heat-trapping gas in the atmosphere to create a 50-50 chance or greater that the world will be locked in to 1.5 degrees Celsius (2.7 degrees Fahrenheit) of long-term warming since preindustrial times. That level of gas accumulation, which comes from the burning of fuels like gasoline, oil and coal, is sooner than the same group of 60 international scientists calculated in a study last year.

“Things aren’t just getting worse. They’re getting worse faster,” said study co-author Zeke Hausfather of the tech firm Stripe and the climate monitoring group Berkeley Earth. “We’re actively moving in the wrong direction in a critical period of time that we would need to meet our most ambitious climate goals. Some reports, there’s a silver lining. I don’t think there really is one in this one.”

That 1.5 goal, first set in the 2015 Paris agreement, has been a cornerstone of international efforts to curb worsening climate change. Scientists say crossing that limit would mean worse heat waves and droughts, bigger storms and sea-level rise that could imperil small island nations. Over the last 150 years, scientists have established a direct correlation between the release of certain levels of carbon dioxide, along with other greenhouse gases like methane, and specific increases in global temperatures.

In Thursday's Indicators of Global Climate Change report, researchers calculated that society can spew only 143 billion more tons (130 billion metric tons) of carbon dioxide before the 1.5 limit becomes technically inevitable. The world is producing 46 billion tons (42 billion metric tons) a year, so that inevitability should hit around February 2028 because the report is measured from the start of this year, the scientists wrote. The world now stands at about 1.24 degrees Celsius (2.23 degrees Fahrenheit) of long-term warming since preindustrial times, the report said.

Earth's energy imbalance

The report, which was published in the journal Earth System Science Data, shows that the rate of human-caused warming per decade has increased to nearly half a degree (0.27 degrees Celsius) per decade, Hausfather said. And the imbalance between the heat Earth absorbs from the sun and the amount it radiates out to space, a key climate change signal, is accelerating, the report said.

“It's quite a depressing picture unfortunately, where if you look across the indicators, we find that records are really being broken everywhere,” said lead author Piers Forster, director of the Priestley Centre for Climate Futures at the University of Leeds in England. “I can't conceive of a situation where we can really avoid passing 1.5 degrees of very long-term temperature change.”

The increase in emissions from fossil-fuel burning is the main driver. But reduced particle pollution, which includes soot and smog, is another factor because those particles had a cooling effect that masked even more warming from appearing, scientists said. Changes in clouds also factor in. That all shows up in Earth’s energy imbalance, which is now 25% higher than it was just a decade or so ago, Forster said.

Earth’s energy imbalance “is the most important measure of the amount of heat being trapped in the system,” Hausfather said.

Earth keeps absorbing more and more heat than it releases. “It is very clearly accelerating. It’s worrisome,” he said.

Crossing the temperature limit

The planet temporarily passed the key 1.5 limit last year. The world hit 1.52 degrees Celsius (2.74 degrees Fahrenheit) of warming since preindustrial times for an entire year in 2024, but the Paris threshold is meant to be measured over a longer period, usually considered 20 years. Still, the globe could reach that long-term threshold in the next few years even if individual years haven't consistently hit that mark, because of how the Earth's carbon cycle works.

That 1.5 is “a clear limit, a political limit for which countries have decided that beyond which the impact of climate change would be unacceptable to their societies,” said study co-author Joeri Rogelj, a climate scientist at Imperial College London.

The mark is so important because once it is crossed, many small island nations could eventually disappear because of sea level rise, and scientific evidence shows that the impacts become particularly extreme beyond that level, especially hurting poor and vulnerable populations, he said. He added that efforts to curb emissions and the impacts of climate change must continue even if the 1.5 degree threshold is exceeded.

Crossing the threshold "means increasingly more frequent and severe climate extremes of the type we are now seeing all too often in the U.S. and around the world — unprecedented heat waves, extreme hot drought, extreme rainfall events, and bigger storms,” said University of Michigan environment school dean Jonathan Overpeck, who wasn't part of the study.

Andrew Dessler, a Texas A&M University climate scientist who wasn't part of the study, said the 1.5 goal was aspirational and not realistic, so people shouldn’t focus on that particular threshold.

“Missing it does not mean the end of the world,” Dessler said in an email, though he agreed that “each tenth of a degree of warming will bring increasingly worse impacts.”