The Earth has been storing heat for billions of years. Wall Street just decided it’s worth more than $10 billion.
Fervo Energy, the enhanced geothermal startup, surpassed a $10 billion market valuation on its public market debut Wednesday, after surging investor demand forced the company to upsize its initial public offering multiple times before trading even began.
Fervo raised $1.89 billion in the offering — roughly $500 million more than originally anticipated — selling an additional 14.6 million shares and raising its price range twice before settling on $27 per share. The stock, trading under the ticker FRVO on the Nasdaq, then rose a further 33 percent when markets opened, pushing the valuation past $10 billion and marking one of the most warmly received energy IPOs in recent memory.
The debut follows nuclear startup X-energy’s own upsized $1 billion IPO several weeks ago — a pattern that reflects a broader investor appetite for energy companies capable of meeting the electricity demands of AI data centers and the hyperscale operators that run them.
The AI Energy Premium
Fervo’s timing was not accidental. Data center operators have become among the most aggressive buyers of electricity, driven by the energy intensity of AI workloads. What they want, above almost everything else, is consistency — power that is available around the clock regardless of weather conditions, grid congestion, or seasonal variation.
Geothermal energy provides exactly that. Unlike solar or wind, which generate electricity only when the sun shines or the wind blows, geothermal power plants produce continuous baseload power from the earth’s internal heat. That characteristic, long understood by energy engineers, has recently been rediscovered by technology executives and, as of Wednesday, by public market investors.
“We were asked a few times on the roadshow, ‘Why aren’t you raising more money?'” said Sarah Jewett, Fervo’s Senior Vice President of Strategy. “As we saw the demand come in, there were just enough signals pointing toward upsizing being not only within the realm of possibility, but the realm of the encouraged.”
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A New Breed of Geothermal
Fervo is not a conventional geothermal company. The basic concept — using the earth’s heat to generate power — has existed for decades. But Fervo belongs to a newer class of developers working on enhanced geothermal, which drills significantly deeper to access hotter rock formations that conventional technology cannot reach.
To do so efficiently, the company has adapted directional drilling techniques developed by the oil and gas industry for shale extraction — a deliberate transfer of methodology from one energy sector to another.
“We’re repeating the playbook from the shale energy industry but with the answer key,” Jewett said.
The approach has yielded measurable progress on costs. Fervo’s first wells took dozens of days to complete and cost more than $1,000 per foot to drill. After 14 wells, the company has reduced both drilling time and cost per foot by two-thirds — a learning curve that underpins much of the investment thesis.
Cape Station and Beyond
The IPO proceeds will primarily support the development of Cape Station, Fervo’s flagship power plant under construction in Utah, which is expected to begin operations this year. The first phase targets 500 megawatts of capacity — a figure largely determined by the size of the grid interconnection Fervo secured — with full build-out expected to take approximately 3 years.
The longer-term potential is considerably larger. Fervo holds permits to develop up to two gigawatts at Cape Station and has applied to expand its grid interconnection accordingly. A third-party engineering assessment suggests the site could ultimately support up to four gigawatts of generating capacity — enough to power a significant portion of a major metropolitan area.
The additional electricity could flow to the broader grid if the interconnection expands. If it does not, Fervo is already fielding direct inquiries from companies seeking to connect their facilities to the plant without routing power through the grid. “We’re seeing an increasing amount of behind-the-meter commercial interest,” Jewett said.
Fervo is also at an earlier stage of development on Corsac Station in Nevada, from which Google has contracted to purchase 115 megawatts.
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The Valley of Death, Crossed
Fervo’s IPO had been widely anticipated by climate technology and energy investors, who told TechCrunch late last year that the company’s operational data from Cape Station and the scale of demand from hyperscalers suggested it had navigated the period of highest development risk — what the industry calls the valley of death — that claims most energy startups before they reach commercial scale.
The Houston-based company closed a $462 million private round in December. Wednesday’s public market debut, and the demand that drove it, suggest those investors read the situation correctly.
Geothermal energy has spent decades as a footnote in the clean energy conversation — technically sound but economically marginal, perpetually promising and rarely delivered at scale. The combination of AI-driven power demand, improved drilling economics, and a public market newly attentive to baseload generation has changed that calculus with unusual speed.
