Analysis
Newcleo began trading on the Nasdaq Global Select Market on September 22 under the ticker NWCL, after closing its business combination with special-purpose acquisition company NewHold Investment Corp III, according to Dealroom and Yahoo Finance.
What Newcleo Actually Builds
Founded in 2021 by physicist Stefano Buono, Newcleo designs small modular reactors cooled by liquid lead rather than water, fueled specifically by recycled nuclear waste rather than freshly mined and enriched uranium. The company is headquartered in Paris with operations across seven countries including Italy, the UK and the US, and employs more than 900 people. The recycled-fuel approach is Newcleo's core differentiation: it doubles as a waste-management pitch, addressing one of the most persistent public objections to nuclear power expansion, alongside the more conventional pitch of abundant, low-carbon baseload electricity.
“The company is headquartered in Paris with operations across seven countries including Italy, the UK and the US, and employs more than 900 people.”
The Deal Structure
NewHold Investment Corp III and Newcleo entered their definitive business combination agreement on May 27, 2026, and shareholders approved it with roughly 93.4% of votes cast in favor. The transaction values Newcleo at approximately $2.4 billion pre-merger. Gross proceeds break down as:
- PIPE round -- $220 million from institutional investors and existing shareholders.
- NewHold trust account -- roughly $209 million.
- Total gross proceeds -- more than $420 million.
That capital funds a company that has not yet built or operated a commercial-scale reactor anywhere, a risk profile investors in newly public SMR companies have increasingly had to accept as normal for the category.
A Crowded Field, With Newcleo Also Investing In Rivals
Newcleo enters public markets alongside TerraPower, X-Energy, Oklo, NuScale and Kairos Power, all racing to be the first advanced reactor design delivering commercial power at scale. Pulse covered Kairos Power's Samsung C&T-backed reactor deal to supply Google just one day before this listing -- nuclear infrastructure has become one of the most active corners of both the funding and IPO markets this fall. Newcleo's position is unusual: it has separately signed a strategic partnership with Oklo and Sweden's Blykalla worth up to $2 billion in newcleo-led investment to build advanced nuclear fuel fabrication and manufacturing facilities in the US, meaning it is simultaneously a newly public competitor to Oklo and a capital partner investing in shared fuel-supply infrastructure that benefits multiple reactor developers at once.
The Numbers In Context
$2.4 billion for a pre-commercial reactor company sits comfortably inside the valuation range this cycle's advanced-nuclear SPAC and IPO deals have commanded, though it is a fraction of TerraPower's cumulative billion-dollar-plus raise or Oklo's public market capitalization since its 2023 SPAC listing. The $420 million in gross proceeds gives Newcleo real runway, but every company in this category is making some version of the same multi-year delivery promise, and advanced reactor projects have a long history of schedule slippage against those promises.
What To Watch
Whether Newcleo's recycled-fuel approach clears the same regulatory and construction timelines its water-cooled and molten-salt competitors are already navigating will be the real test of its differentiation claim. Given the company's dual role as both a public reactor developer and an investor in shared fuel-fabrication infrastructure with Oklo and Blykalla, how that fuel-supply partnership performs commercially may end up mattering as much to Newcleo's own stock as its own reactor construction progress.