X-energy has closed a $700M Series D led by Jane Street, including participation from Ares Management funds, ARK Invest, Corner Capital, Emerson Collective, Galvanize, Hood River Capital Management, NGP, Point72, Reaves Asset Management, Segra Capital Management, and XTX Ventures...
Forbes spotlights Aalo Atomics, a Nucleation portfolio company, as part of a new wave of U.S. advanced-nuclear companies moving from concepts to manufacturing, with progress at its Austin factory, a 2026 criticality target at INL, and growing investor support.
Nucleation Capital extends a hearty congratulations to four founders from Nucleation portfolio companies—Matt Loszak and Yasir Arafat from Aalo Atomics, Jake Jurewicz from Blue Energy, and Jerrold Vincent from Nuclearn—who have been recognized by the America Nuclear Society for inclusion in their NuclearNews' 2025 “40 Under 40” list, which celebrates innovators shaping the future of nuclear energy. All four are doing amazing things with their companies and are extremely deserving of this recognition.
The complete list of 2025 NuclearNews 40 under 40 includes:
On Nov. 5th, as part of SOSV's Climate Tech Summit, Rod Adams of Nucleation Capital and Matt Loszak, CEO of Aalo Atomics joined Tim De Chant of TechCrunch in a panel called "Nuclear Fission Refueled: Putting Nuclear Back on the Map." Aalo Atomics, one of Nucleation's portfolio companies, had an opportunity to shine, as the only fission venture featured. Matt spoke about where Aalo is in its development cycle, why it has been pursuing DOE authorization for the past two years, why it was a serendipitous choice, given recent actions by the DOE and how that intersects with Aalo's NRC licensing process, among many other aspects of how Aalo is progressing with its development of a Gen IV nuclear reactor that is "purpose built" for data centers.
To listen to this panel, please click: "Nuclear Fission Refueled: Putting Nuclear Back on the Map."
Zeno Power joined industry leaders in highlighting nuclear as vital to surviving the lunar night and maintaining U.S. leadership in the new space race.
Portfolio company Blykalla has secured Oklo as a co-lead investor in its A2 round and formed a transatlantic partnership to collaborate on reactor technology, supply chains, and regulatory pathways...
Nuclearn, a Nucleation portfolio company, is applying AI to ease workflow burdens in nuclear plants, giving engineers more time to focus on safe, effective operations...
Nucleation Capital is proud to announce its participation in NuclearN's second round of financing, its Series A, in which the company raised $10.5 million to accelerate the development a range of AI services aimed at the nuclear industry. This marks our second investment in NuclearN following our participation in their Seed round back in mid-2023.
The round was led by Blue Bear Capital, with participation from SJF Ventures and follow-on investments from existing investors AZ-VC and Nucleation Capital. The new funding will be used to advance development of Nuclearn's domain-specific AI solutions, increasing their offerings with new analytic and AI features that support operations, engineering, and regulatory compliance and accelerating market expansion.
NuclearN's solutions are already deployed in more than 65 reactors globally and the company is already profitable. This funding will therefore serve as a shot in the arm to accelerate the company's growth, just as AI is driving unprecedents demand for energy and existing nuclear power plants are being uprated, being restarted and being built. Nuclearn can help each plant improve its operational and capital cost bottom line and there is no end in sight to the benefits that may be realized through NuclearN's combination of nuclear operations data analytics and AI-optimizations.
Nuclearn's platform combines advanced AI with deep nuclear domain knowledge to automate complex workflows that typically require weeks of specialized personnel effort and support technicians in the field. Developed by founders with over 30 years of combined nuclear operations experience and trained on millions of specialized nuclear industry documents and diagrams, the technology understands not only what nuclear professionals need, but also the regulatory and safety context behind every decision. "We are extremely proud and pleased to continue to support this talented team and participate in the incredible work being done by NuclearN to improve nuclear power's safety, up-time performance and bottom line," said Valerie Gardner, Nucleation's managing partner.
Planetary Technologies, a Nucleation portfolio company, is among the founding members of the new Marine Carbon Dioxide Removal (mCDR) Coalition, a first-of-its-kind forum to support responsible growth of ocean-based carbon removal.
The coalition, co-chaired by the Carbon Business Council and the World Ocean Council, brings together innovators, scientists, and policy leaders to accelerate research, support evidence-based policy, and build collaboration across the marine CDR ecosystem. Founding members include Planetary, Banyu Carbon, Captura, Capture6, Ebb Carbon, Equatic, Isometric, Limenet, Puro.earth, SeaO2, Vesta, and Vycarb, with additional observers such as Carbon180, Ocean Visions, and the Institute for Responsible Carbon Removal.
Marine carbon dioxide removal is increasingly recognized as a critical tool to complement emissions reductions and contribute to climate goals. The ocean covers 71% of the Earth’s surface and holds immense potential to help achieve net zero when approached with scientific rigor, community engagement, and environmental safeguards. The launch of this coalition provides the mCDR field with a dedicated forum for knowledge-sharing, international coordination, and responsible development.
Planetary has already emerged as a global leader in this space, recently winning an XPRIZE Carbon Removal Award for its ocean alkalinity enhancement approach. By joining the coalition, Planetary and its peers aim to ensure that marine CDR methods advance in a way that is credible, collaborative, and environmentally responsible.
Read the full announcement from the Carbon Business Council here.
Nucleation Capital is proud to back Aalo Atomics once again, participating in their $100 million Series B round. This marks our second investment in Aalo, following our participation in their Series A in Q3 2024 and now again in Q3 2025.
The Series B was led by Valor Equity Partners, with participation from new and existing investors including Nucleation Capital, Fine Structure Ventures, Hitachi Ventures, NRG Energy, and others.
Nucleation is honored to be able to continue supporting Aalo as they accelerate towards commercialization as part of the DOE’s pilot licensing program. And we’re pleased to be able to provide more accredited investors access to exciting ventures innovating the future of energy like Aalo. If you wish to participate in Aalo, you may still do so with a subscription to Nucleation’s Fund I starting in Q3-2025. Learn more here.
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