Top Geothermal Energy Stocks 2026: Earth's Power on Tap

Geothermal is the simplest energy idea on Earth. Dig a hole. The rock is hot. Pump water through it. Make steam. Spin a turbine. Repeat forever.

The catch, for the last 100 years, was where you could dig the hole. Old-school geothermal needs hot water already sitting in cracked rock near the surface. That's Iceland, Kenya, New Zealand, a few valleys in Nevada. For everywhere else, the heat is there, but it's locked inside dry rock that nobody could harvest for a profit.

Then, a bunch of ex-fracking engineers looked at that dry rock and said: we know how to crack rock.^[1]

Horizontal drilling and hydraulic fracturing, borrowed straight from the shale patch, turn a resource that worked in five places into one that could work in fifty. And the timing is just right. Every hyperscaler on the planet is begging for electricity that runs 24 hours a day, doesn't burn anything, and can be built in years instead of decades. Geothermal is the only clean source that checks all three boxes without a reactor.

So the money showed up:

• Meta signed for 300 MW across two next-gen geothermal startups (Sage Geosystems in Texas, XGS Energy in New Mexico).
• Google signed 150 MW with Ormat in February 2026 and 115 MW with Fervo via NV Energy.
• Congress killed most wind and solar credits in last year's budget bill but kept geothermal's. DOE followed with $171.5M for field-scale tests.
• And in May 2026, Fervo Energy pulled off the biggest clean-energy IPO in history: $2.2B raised, shares priced at $27, opened at $35, market cap north of $10B on day one.

Fervo's first quarterly report as a public company showed $113,000 of revenue against a $55.9M net loss. The stock slid into the high teens by late August. The market went from "geothermal is the new nuclear" to "wait, when does the power actually turn on?" in about 90 days.

But here's the number that matters more than any stock price:

At $7,000/kW, geothermal competes with new nuclear. At $3,000/kW, it competes with a gas plant.

We're slicing this theme by how much drilling risk you're actually buying:

• Pure-plays own the rock and the risk. Two stocks, wildly different personalities.
• Geothermal utilities already have the steam and pay you dividends for it. Boring on purpose.
• Picks-and-shovels sell the rigs, casing, and turbines to everyone above. They get paid whether the well works or not.
• Private bellwethers are the next wave of pure-plays, and where the next IPO comes from.

These are the only two stocks on a US exchange where geothermal is the business. One has been doing it since before you had a smartphone. The other has been public since May.

Fervo Energy NASDAQ: FRVO

Fervo is the reason this watchlist exists. CEO Tim Latimer spent his early career drilling horizontal shale wells, and Fervo is that playbook pointed at hot granite in Beaver County, Utah. Cape Station Phase I is ~100 MW, fully contracted to Southern California Edison and Shell Energy, and two of its three GeoBlocks hit mechanical completion in Q2. First power is due Q4 2026. Phase II adds 400 MW by 2028. Behind that sits a pipeline Fervo says is over 50 GW, a 2030 target of 1.1 GW, and $2.11B of cash from the IPO.

The bull case is a cost curve: Fervo cut drilling time 70% versus its first commercial well, and the latest Sawtooth 7 well went 19,448 feet deep with a 7,500-foot lateral in 21 days. The bear case is the P&L. Fervo plans to spend $850–900M in the second half of this year alone, with basically zero revenue until Cape Station lights up. That's why the stock is down roughly a third from its IPO price and why Baird cut its target from $50 to $35 (still Outperform) after Q2. You're buying a construction schedule.

Ormat Technologies NYSE: ORA

If Fervo is the startup, Ormat is the adult in the room. It owns and runs over a gigawatt of geothermal in the US, Kenya, and Central America, and it manufactures the binary turbines (the Ormat Energy Converter) that everyone else buys. Q2 revenue rose 10.6% to $258.8M, adjusted EPS of $0.50 nearly doubled the Street's number, and management raised full-year revenue guidance to $1.15–1.2B. It pays a $0.12 quarterly dividend. Market cap is about $6.5B, bigger than Fervo.

Ormat is playing the next-gen wave by hosting it. It co-led Sage Geosystems' $97M Series B and will let Sage build its first commercial plant under one of Ormat's existing Nevada or Utah stations. It's running its own EGS pilots at Desert Peak. It signed Google for 150 MW and Switch for a 20-year data-center PPA. Ormat gets the AI-demand upside with a balance sheet that already prints cash. If you want geothermal exposure and don't want to sweat a first-power date, this is the one.

These companies sit on top of the good rock: the volcanic zones where geothermal has worked for decades. No fracking, no science risk. You're buying contracted electricity and, mostly, a dividend. The trade-off is currency and country risk, and you'll need a broker that reaches Auckland or Jakarta.

Contact Energy NZX: CEN

Contact runs seven geothermal stations around Wairākei and Tauhara on New Zealand's North Island, and geothermal is the backbone of what it generates. It's replacing aging Wairākei capacity with the 101 MW Te Mihi Stage 2 binary plant, due September 2027. The July 2025 Manawa acquisition bulked up its hydro fleet, so this is a diversified NZ power utility with a geothermal core. Market cap around US$5.6B.

Mercury NZ NZX: MCY

Mercury is Contact's neighbor and rival: five geothermal stations plus nine hydro dams on the Waikato River, an entirely renewable fleet. Its Ngā Tamariki expansion took that station to five units and 132 MW this year. The New Zealand government must keep at least 51% of the shares, which caps M&A drama but also caps downside. Think of it as a regulated-utility way to own geothermal.

Pertamina Geothermal Energy IDX: PGEO

PGE is the state-owned Indonesian geothermal arm, with 727 MW across six operating areas on the Ring of Fire and 110 MW of Hululais coming in late 2027 or early 2028. Indonesia has more geothermal potential than any country on Earth and has barely scratched it. The wrinkle: a chunk of revenue comes from selling steam to the state utility rather than electricity, which limits the upside but also offloads plant risk. Market cap about US$2.4B. Higher political risk, higher resource ceiling.

Polaris Renewable Energy TSX: PIF

Polaris is the micro-cap on this list, roughly US$223M. Its anchor asset is the 82 MW San Jacinto geothermal plant in Nicaragua, with a PPA running to 2039, surrounded by smaller hydro and solar assets across Latin America. It's here because it's the only geothermal-anchored name you can buy on a North American exchange for under a billion. Liquidity is thin and Nicaragua is Nicaragua. Size accordingly.

Fervo drills wells that look exactly like shale wells. That means the entire oilfield-services industry is a geothermal supplier now, whether it planned to be or not. These companies get paid per foot drilled and per turbine shipped.

Baker Hughes NASDAQ: BKR

Baker Hughes is the deepest geothermal bet among the oilfield majors. It won the award to design and deliver the power-generation equipment for all five plants at Cape Station, so a piece of every Fervo megawatt flows through BKR's Industrial & Energy Technology segment. In June 2026 it signed with Mantle Reach Power, an EnCap-backed developer, to act as integrated subsurface provider for up to 500 MW over five years. It also owns a stake in GreenFire, which retrofits abandoned oil wells into closed-loop geothermal. Geothermal is a rounding error on Baker's income statement today, but it's the cleanest large-cap way to own the drilling side.

Nabors Industries NYSE: NBR

Nabors is the land-rig contractor that decided to become a geothermal venture fund. On August 27, 2026, it put $35M into Quaise Energy's Series B, becoming Quaise's largest shareholder at 14% fully diluted. It already held an earlier stake in Sage Geosystems and a piece of GA Drilling, which makes superhot-rock drill bits. If any of those private companies IPO, Nabors shareholders get a slice without paying startup multiples. The core rig business is still tied to oil and gas cycles, so this is a leveraged, volatile way in.

Vallourec EPA: VK

Every horizontal well needs miles of steel casing that can survive 460°F brine. Vallourec, the French tubular maker, signed a five-year deal with Fervo in April 2026 worth up to $800M in revenue, with the pipe rolled in Youngstown, Ohio. That's a fully domestic supply chain for a company that will drill hundreds of wells this decade. A Paris listing keeps it off most US screens, which is exactly why it's on this one.

Fervo's IPO proved a next-gen geothermal company can go public and raise $2B. Quaise's CEO said out loud that Fervo's listing gave his own raise a boost. These four are the ones most likely to follow, and the ones whose news moves the public names above.^[2]

Sage Geosystems (Private)

Sage's twist is "pressure geothermal": it uses the pressure of injected water, not just the heat, so the same well can generate power and store energy like a subsurface battery. Meta signed for up to 150 MW in Texas, first phase due 2027, the first big geothermal project east of the Rockies. Ormat co-led its $97M Series B in January and is hosting Sage's first commercial plant. Total raised is around $159M, but the brownfield approach is deliberately capital-light. No IPO filing yet; the Ormat tie-up makes an acquisition just as plausible.

XGS Energy (Private)

XGS runs a closed-loop system that doesn't consume water, which matters when your customer is a data center in the New Mexico desert. Meta backed a two-phase 150 MW project there through a special contract with utility PNM, targeting grid delivery around 2030. Less funded than the others (roughly $57M disclosed), so watch for a large round or a strategic partner before any listing chatter.

Eavor Technologies (Private)

Calgary-based Eavor builds the "underground radiator": a sealed loop drilled 4.5 km down with six multilateral pairs, no fracking, no water loss, no earthquake risk. Its Geretsried plant in Bavaria delivered grid power in December 2025, a first for any closed-loop system, and will ramp to 8.2 MW of electricity plus 64 MW of district heat. Backed by bp, Chevron, and Canada's Growth Fund, with over $560M raised. Closed-loop makes less power per well than EGS, so the bull case is heat and geography, not raw gigawatts.

Quaise Energy (Private)

Quaise is the moonshot. Instead of grinding rock, it vaporizes it with millimeter-wave energy borrowed from fusion research, aiming for "superhot" rock 10–20 km down where a single well could produce 10x the power. It closed a $134M Series B this year, is planning a $200–250M Series C in Q1 2027, has a pilot plant in the works in Oregon, and is exploring hybridizing a coal plant at Nevada Gold Mines. Nabors owns 14%. If the tech works, it rewrites the sector's cost curve. If it doesn't, Nabors has an interesting write-down.

The rock doesn't cooperate. This is the risk that's unique to geothermal and impossible to hedge. Wells cost millions each. Some come in cold. Producing reservoirs can decline faster than the model said. Fervo is about to run this experiment at 100 MW scale. The tell is a first-power announcement from Cape Station in Q4 2026, then whether Phase I actually reaches ~100 MW by early 2027. Any slip, or any hint that wells are cooling faster than planned, hits FRVO first and every private valuation second.

The cost curve stalls. Geothermal wins if $/kW keeps dropping toward gas-plant territory. Fervo's Phase II is supposed to come in at $5,500/kW, down from $7,000. If that number gets revised up on the next earnings call, the whole sector de-rates and Fervo becomes an expensive science project with a pretty IPO. Keep an eye on capex burn too: $850–900M in H2 2026 against $2.11B of cash means Fervo either hits milestones or raises again. And note the FRVO IPO lockup expires around mid-November 2026, right when first-power news is due. Insiders selling into that headline would be a tell.

Next 12–18 months, in order of how much they'll move the stocks:

1. Cape Station first power (Q4 2026). Fervo says two of three GeoBlocks are mechanically complete. If electrons hit the grid on schedule, FRVO's slide reverses and every private round gets easier. If it slips to 2027, expect a rough tape.
2. Fervo's lockup and first full-year guide (Nov 2026–Feb 2027). Watch the $/kW disclosures for Phase II more than the loss line.
3. Sage's first commercial plant at an Ormat site (2026–27) and the Meta Texas project's 2027 date. Success here validates the "brownfield" model and makes ORA the sector's kingmaker.
4. Quaise's Series C (Q1 2027). The size and who leads it will tell you whether superhot rock is fundable or fringe.
5. Eavor's Geretsried ramp toward 8.2 MW. Closed-loop needs to prove it can scale past a demonstration.
6. Contact's Te Mihi Stage 2 (Sept 2027) and PGE's Hululais, for the dividend crowd.
7. The next IPO. No filings are public, but Sage, Eavor, and Quaise each have a reason to test the window once Fervo has a quarter of real revenue. A second listing would finally make this a sector.

The bigger picture: AI power demand isn't going away, geothermal is the only clean firm source that doesn't need a nuclear license, and both parties in Washington like it. The next year tells us whether that's true at 100 MW, or only in a slide deck.