Best Geothermal Stocks
Last updated July 2026
Short answer
Geothermal is a genuine energy theme with a catch that shapes everything: it has almost no pure-play public stocks. The one true pure-play is Ormat Technologies (ORA), which owns and operates geothermal power plants. Beyond it, exposure comes from diversified energy and oilfield-services names bringing drilling technology to enhanced geothermal, such as BKR, SLB, and CVX, where geothermal is a small slice of a much larger business. Many of the most exciting developers, like Fervo Energy, are still private. Because the pure-play universe is so thin, most investors get geothermal exposure through a broad clean-energy fund. The useful move is to understand those three routes and their trade-offs. Walnut, an AI investing app, can compare these names against your existing holdings. This page is descriptive and informational, not investment advice.
Geothermal gets fresh attention every time enhanced geothermal, which borrows oil-and-gas drilling techniques to tap underground heat almost anywhere, hits the headlines. That drives searches for the best geothermal stocks. But the honest reality is that the investable pure-play list is essentially one name, and most of the innovation is still private. So this guide does not pretend there is a deep basket to rank. It maps the three real ways to get geothermal exposure, explains what each actually is and its risks, links each name to a fuller page, and points to the fund route that most people use. Nothing here is a recommendation to buy or sell, and Walnut is not an investment adviser.
Why the geothermal stock list is so short
The defining fact of this theme is scarcity. Geothermal power has historically needed specific geology and heavy upfront capital, so very few dedicated companies ever reached public markets. That leaves Ormat as the lone pure-play, and it means you cannot build a diversified basket of geothermal names the way you can with solar or wind.
The recent excitement does not change the near-term investable universe as much as it looks.
- Enhanced geothermal is real but early. Using drilling and fracturing techniques to reach heat more widely is promising, but it is unproven at large scale, so the growth case can slip.
- The leaders are private. The most talked-about developers, such as Fervo Energy, are still privately funded, so you cannot buy them as stocks yet.
- The technology sits inside big companies. The public way to own the enhanced-geothermal angle is through diversified oilfield-services and energy firms, where geothermal is a rounding error on the income statement today.
Read the short list as a feature of an early theme, not as a gap in this page.
The three routes to geothermal exposure
Below are the public names most associated with geothermal in 2026, grouped by what they actually are. For each, the note explains the business and why it is held, not whether you should own it. Every name links to its own page.
The pure-play
There is essentially one public pure-play geothermal company. That scarcity is the single most important fact about this theme: unlike solar or wind, you cannot build a diversified basket out of dedicated geothermal names, because most of them do not exist as public stocks.
- Ormat Technologies (ORA). Ormat Technologies is the only major public pure-play in geothermal: it develops, owns, and operates geothermal power plants worldwide and also builds energy-storage projects. It is the name almost every geothermal search leads to, held as the one direct way to own the theme, with the concentration and project-execution risk that comes with being the sole pure-play.
Diversified names bringing the technology
The more interesting geothermal story in 2026 is enhanced geothermal, which uses oil-and-gas drilling and fracturing techniques to reach heat almost anywhere. That means the companies with the relevant technology are the large oilfield-services and energy firms, for whom geothermal is a small but growing piece, not the whole business. You are buying a diversified energy company with optionality on geothermal, not a geothermal stock.
- Baker Hughes (BKR). Baker Hughes supplies drilling and equipment technology used in enhanced geothermal projects and has partnered with next-generation developers. It is held as a diversified energy-technology name with geothermal upside, though oil and gas services still drive the results.
- SLB (Schlumberger) (SLB). SLB, the largest oilfield-services company, has a dedicated new-energy arm that includes geothermal ventures and lithium. It is held as a diversified way to own the drilling expertise geothermal depends on, with the core business tied to global oil-and-gas activity.
- Chevron (CVX). Chevron has explored geothermal through its new-energies unit alongside its core oil-and-gas business. It is held as a diversified major with a small geothermal option embedded, not as a geothermal play in any meaningful proportion.
The third route is a fund. Because there is no pure-play geothermal ETF either, most investors get a geothermal slice through a broad clean-energy fund alongside solar, wind, and storage. See the best geothermal ETFs guide for how that works.
At a glance
The full public geothermal-adjacent list, grouped by what each name actually is.
| Ticker | Company | Geothermal role |
|---|---|---|
| ORA | Ormat Technologies | The one public pure-play; owns and operates geothermal plants. |
| BKR | Baker Hughes | Oilfield-services and equipment tech applied to geothermal. |
| SLB | SLB (Schlumberger) | Largest oilfield-services firm with a new-energy geothermal arm. |
| CVX | Chevron | Integrated major with a small new-energies geothermal effort. |
How do you own an early theme like this without over-betting?
When a theme has one pure-play and a private frontier, the risk is concentrating too hard in a single story. The repeatable way to handle it looks like this.
- Decide how direct you want to be. Owning Ormat is the most direct expression and the most concentrated. Owning the oilfield-services names is more diversified but dilutes the geothermal exposure heavily.
- Size the pure-play small. Because it is a single company carrying the whole theme, keep it a modest slice so a project or execution stumble does not dominate the portfolio.
- Use a fund for breadth. A clean-energy ETF gives a geothermal slice inside a wider renewable basket, which is often the more sensible core for a thin theme.
- Set target weights. Assign each position a percentage that sums to 100, so a speculative early theme stays a deliberate, bounded part of the whole.
- Watch for the private names to list. If a developer like Fervo goes public, the investable universe widens and the concentration eases.
This is exactly what Walnut is built for. You create a thematic basket from the names you choose, set a target weight for each, see how the basket would track against the S&P 500, and place trades you approve yourself at your own broker. Walnut shows how the mix is concentrated, which matters most when a theme leans on a single name. Walnut does not tell you which stocks to buy.
How we chose what to feature
To be clear about method: this is not a prediction and not a ranking. We did not forecast prices. We featured the public names genuinely associated with geothermal on three descriptive criteria.
- Real geothermal link. Each name has an actual geothermal business or technology role, rather than a loose clean-energy association.
- Public and investable. We featured names you can actually buy, and were explicit that the most exciting developers are still private.
- Route-representative. Each illustrates one of the three ways to get exposure (pure-play, diversified technology supplier, or fund) so the page teaches the trade-offs, not a single pick.
The result is an honest map of a thin, early theme, not a buy list. Company strategies and geothermal exposure change; verify current details before you act.
The bottom line on the best geothermal stocks
The honest answer to “what are the best geothermal stocks” is that the investable list is very short. Ormat Technologies is the one real pure-play, and owning it means concentrating in a single company. Beyond it, geothermal exposure comes from diversified energy and oilfield-services names like Baker Hughes, SLB, and Chevron, where it is a small slice, and from broad clean-energy funds. The most exciting enhanced-geothermal developers are still private. Because the theme is this thin, the sensible move for most people is a fund for breadth plus a small, deliberate pure-play position if they want it. Walnut helps you turn that into a basket you control. It is not an investment adviser, and nothing here is a recommendation.
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FAQ
What are the best geothermal stocks in 2026?
The honest answer is that the investable list is very short, because geothermal has almost no pure-play public companies. Ormat Technologies (ORA) is the one true pure-play. Beyond it, geothermal exposure comes from diversified energy and oilfield-services names bringing drilling technology to enhanced geothermal, such as Baker Hughes (BKR), SLB, and Chevron (CVX), where geothermal is a small piece of a much larger business. Many of the most exciting developers are still private. Treat this as research, not recommendations. Walnut is not an investment adviser.
Is there a pure-play geothermal stock?
Effectively one: Ormat Technologies (ORA), which develops, owns, and operates geothermal power plants and also builds energy storage. That scarcity is the defining feature of the theme. Unlike solar or wind, you cannot assemble a diversified basket of dedicated geothermal names, so owning the theme directly means concentrating in a single company, which is a real risk to weigh.
Why are there so few geothermal stocks?
Geothermal has historically been capital-intensive and limited to regions with accessible heat, so few dedicated companies reached public markets. The recent excitement is around enhanced geothermal, which uses oil-and-gas drilling techniques to access heat more widely, but the leaders in that wave, such as Fervo Energy, are still privately funded. Until they go public, most geothermal exposure has to come through Ormat, diversified energy names, or funds.
How can I invest in geothermal if the leaders are private?
There are three practical routes. Own the one pure-play, Ormat, and accept the concentration. Own diversified energy and oilfield-services names like Baker Hughes, SLB, or Chevron that supply the technology, understanding geothermal is a small slice of them. Or use a broad clean-energy ETF that holds a geothermal component alongside solar, wind, and storage, which spreads the bet. Our best geothermal ETFs guide covers the fund route.
Should I buy geothermal stocks or a clean-energy ETF?
For most people the fund route is the more diversified way in, precisely because the pure-play universe is so thin. A clean-energy ETF gives you a geothermal slice inside a broader renewable-energy basket, so you are not betting everything on a single company. Buying the individual names lets you concentrate on Ormat or tilt toward the oilfield-services angle, at the cost of far more concentration. The choice is yours; there is no single right answer.
What are the risks of geothermal stocks?
The biggest is concentration: with one real pure-play, owning the theme directly means depending on a single company’s projects and execution. The diversified names carry the ups and downs of oil and gas, where geothermal is too small to move the needle. Enhanced geothermal is still an early, unproven-at-scale technology, so the growth case can slip. And energy themes are sensitive to power prices and policy. Diversifying across the routes helps manage, but does not remove, these risks.
Does Walnut recommend which geothermal stocks to buy?
No. Walnut is not a registered investment adviser and does not tell you what to buy. It lets you build a thematic basket from the names you choose, set target weights, see how the basket would track against the S&P 500, and place trades you approve yourself at your own broker. Every page here is descriptive and informational, not a recommendation.
From here you can dig into any individual stock, or read the best geothermal ETFs guide for the more diversified fund route into the theme.
Walnut is informational and is not a registered investment adviser. This page describes public companies associated with geothermal energy, grouped by role; it is not a prediction, a ranking, or a recommendation to buy, sell, or hold any security. Investing involves risk, including the possible loss of principal, and past performance does not indicate future results. Company strategies and geothermal exposure change; verify current details before making any decision. Do your own research or consult a licensed financial professional.