A Sector Long Overdue for a Public Markets Moment
For years, climate tech investors have been watching and waiting. After the initial green energy boom of the early 2010s fizzled out — leaving behind a graveyard of failed solar panel manufacturers and overhyped battery startups — the sector spent the better part of a decade rebuilding credibility. Now, in 2026, there are real signs that the public markets are finally ready to take climate tech seriously again.
Nuclear startup X-energy recently went public, marking a significant milestone not just for the company but for the broader climate tech ecosystem. X-energy, which develops small modular reactors (SMRs) designed to be faster and cheaper to build than conventional nuclear plants, represents a new generation of energy companies — ones that are past the pure research phase and operating in the real world. Its IPO signals that institutional investors believe the commercial case for advanced nuclear is no longer theoretical.
Fervo Energy Lines Up for Liftoff
Hot on X-energy's heels is Fervo Energy, a geothermal startup that's been quietly building a reputation as one of the most technically credible companies in the clean energy space. Fervo uses techniques borrowed from the oil and gas industry — specifically horizontal drilling — to unlock geothermal energy in places where traditional geothermal power was previously impossible.
Fervo's expected IPO would give the company access to the capital it needs to scale its projects beyond early commercial deployments. It would also send another signal to the market: that innovative climate tech companies with real technology and real customers can command serious valuations on public exchanges.
Why Now?
The timing isn't accidental. Several factors are converging to make 2026 a plausible inflection point for climate tech on public markets.
Data centre demand for clean, reliable power is surging as AI infrastructure buildout accelerates globally. Both nuclear and geothermal offer something that wind and solar can't: firm, always-on power that doesn't depend on weather conditions. Tech companies desperate to meet sustainability commitments while keeping the lights on for power-hungry GPU clusters have become unlikely champions of advanced nuclear and geothermal energy.
There's also a maturity argument. The companies entering the public markets now aren't the speculative moonshots of a decade ago. X-energy and Fervo have government contracts, commercial partnerships, and operating projects — the kind of track record that gives public market investors something concrete to evaluate.
What It Means for Climate Tech Investors
For investors who have patiently backed climate tech through years of private market funding rounds, an active IPO window is a genuine liquidity moment. It validates the thesis that patient capital in hard tech can eventually find a public exit, and it sets a benchmark for the dozens of other climate companies still in the pipeline.
The open question is whether these early IPOs will perform well enough to keep the window open. Climate tech has false dawns in its history. But with energy security concerns, AI power demand, and decades of technical progress all converging at once, there's reason to believe this time could be different.
Source: TechCrunch
