The geothermal developer increased its share count by 26% and its top-of-range price by about 8% in an SEC filing on Monday. The revision points to the demand for clean baseload power that AI data-centre buyers have been ready to pay for.
Fervo Energy raised its IPO target on Monday to as much as $1.82bn, up from $1.33bn just over a week earlier, the Houston-based geothermal developer disclosed in an SEC filing.
Fervo now plans to sell 70 million shares at $25 to $26 each, against the previous range of 55.56 million at $21 to $24. At the top of the new range, the listing would carry a market value of approximately $7.4bn against Fervo’s outstanding share count.
The size-and-price increase is unusually large for an IPO that has not yet priced. The combination of more shares plus a higher price band typically signals strong indications of interest during the roadshow, with the underwriters and the company concluding that the order book can absorb a larger trade at richer levels.
The $1.82bn top-of-range figure would make Fervo the largest climate-tech IPO of 2026 to date and one of the largest US IPOs in the energy sector since the post-2021 cycle began. JPMorgan is leading the syndicate.
The investor list behind Fervo reads as a who ‘s-who of AI and clean-energy alignment. Bill Gates’s Breakthrough Energy Ventures has been a long-term backer; Alphabet has invested directly and is also a major commercial customer; Devon Energy and Shell have positioned the geothermal company alongside their own portfolio diversification work; B Capital led the December 2025 Series E that closed at $462m.
The composition of that investor base is part of the reason the IPO can be priced at the level it is. Each of the strategic investors brings either commercial offtake interest or industrial-policy alignment that supports the company’s revenue trajectory.
Fervo’s flagship project, Cape Station in Beaver County, Utah, is the world’s largest planned enhanced geothermal system development at 500 MW of installed capacity.
Phase 1, sized at roughly 100 MW, is under construction and is on track to deliver first grid power later this year. Full build-out is targeted for 2028.
The economic logic is significant: enhanced geothermal applies oil-and-gas drilling techniques to access hot rock at depth, producing baseload power that runs 24 hours a day without the intermittency that constrains solar and wind.
For data-centre operators trying to source firm clean power, that profile is exactly what their PPA structures need.
The same logic supports the equity-market interest. Investors who have watched X-Energy’s record $1.02bn nuclear IPO price strongly into a data-centre-driven nuclear thesis are now looking at geothermal as the next clean-baseload bet.
The Cape Station Utah project has been progressing through a phase the broader market has wanted to see proved out before committing.
The fact that Fervo can credibly point to first grid power within months, with 500MW of build-out behind it, is what the higher IPO target reflects.
The customer side reinforces the trade. Alphabet signed Fervo to a multi-year PPA for AI data-centre power in 2023; that contract has expanded as the build has progressed, and Alphabet is now both a customer and an equity-holder.
Other hyperscaler customers have been reported as in advanced negotiation. The pattern echoes Nvidia’s $2.1bn warrant on IREN’s data-centre build-out, where Nvidia structured both a commercial commitment and an equity position.
The pattern is the same one that has shaped most clean-baseload investing in 2026: AI data-centre buyers, faced with grid-interconnection delays and decarbonisation commitments, are committing to off-take well ahead of operations, which gives developers the cash-flow visibility their public-market valuations depend on.
Fervo’s losses have widened in recent quarters, as is typical for a developer running multi-year construction projects ahead of revenue commencement.
The financial statements in the S-1 acknowledge that the company will not be profitable for several years; the IPO proceeds are explicitly earmarked for Cape Station Phase 1 completion, Phase 2 financing and a parallel set of smaller projects in California and Nevada.
Investors are pricing the company on long-duration cash flows under the multi-year PPAs already signed, plus optionality on the additional capacity to be built once Cape Station is operating.
From a market-mechanics standpoint, the size increase places Fervo as the most-watched IPO of the second quarter. Fervo’s earlier $1.33bn launch target set the bar; the new range stretches the deal materially without changing the company’s underlying story.
Pricing is expected the week of 11 May, with allocations finalised shortly afterwards. Bookrunner indications suggest the deal is currently several times oversubscribed at the new range, although the precise multiple will not be confirmed until allocations.
There are risks. Enhanced geothermal at the scale Fervo is targeting has not yet been operated at the Cape Station’s 500MW design point; first-of-kind execution risk remains.
Drilling-cost inflation, water permitting and grid-interconnection timing have all delayed adjacent geothermal projects in the western US.
Fervo’s S-1 discloses each of these risks in the standard manner, and the IPO pricing reflects them in the spread between the $25-$26 range and what unconstrained AI-clean-baseload comparables might suggest.
For the broader IPO calendar, Fervo’s pricing test matters beyond geothermal. The 2026 IPO window has reopened cautiously after a slow Q1, with X-Energy and Fervo as the standard-setters at the clean-energy end and Lime, CoreWeave-class adjacents at the consumer and infrastructure ends.
A successful Fervo print at the upper end of the new range will signal that the post-spring slowdown in IPO appetite has fully reversed, at least for capital-intensive infrastructure stories with long-duration off-take contracts.
A weaker print, or pricing at the bottom of the new range, will tell a different story about how patient the public markets are willing to be on multi-year construction trajectories.
Bookbuilding wraps Tuesday afternoon. Pricing is expected after the close. Fervo will trade under FRVO on the Nasdaq from Wednesday.
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