VC/PE

Thorizon Raises €20M for Molten Salt Reactors

In its bid to develop an inherently safe molten salt reactor, Amsterdam-based Thorizon has raised a €20M ($21.7M) batch of funding. The round of funding—part of the company’s Series A—was led by the Dutch National Promotional Institution, and included participation from Positron Ventures, PDENH, and Impuls Zeeland. In the round announcement, Thorizon signaled that it’s […]

FusionVC/PE

Renaissance Fusion Raises €32M for Stellarator Design

Another batch of funding has hit the fusion sector, and this time around, it’s supporting a simplified version of the twistiest concept around. Renaissance Fusion, a French stellarator developer, announced last week that it’s raised a €32M ($34.7M) funding round to advance development of its fusion machine concept and work toward a demo plant (h/t […]

VC/PE

Valar Atomics Raises a $19M Seed

What could nuclear power do if it was free from the restraints of the grid? Valar Atomics looks to answer that question by using nuclear reactors to create hydrocarbons that can replace traditional oil and gas-based fuels. This week, the company raised a $19M seed round, reached a tech milestone, and announced a major partnership […]

VC/PE

Everstar Emerges With a $4M Pre-Seed

When you ask an advanced nuclear company about its biggest struggle in getting a reactor to market, the answer is almost always the regulatory process. (Believe us—we’ve asked.) Everstar was created to make the regulatory and compliance process a little easier for companies. This week, the startup announced that it has raised a $4M pre-seed […]

FuelVC/PE

X-energy Closes $700M Series C-1

X-energy has officially closed its Series C-1 funding round, which was announced publicly in October when Amazon’s Climate Pledge Fund and partners committed ~$500M. The grand total for the round is a whopping $700M, which is expected to go toward reactor development and licensing, building the TRISO-X fuel facility, and pursuing commercialization opportunities for the […]

FusionVC/PE

Helion Raises a $425M Series F

We’ve got what you’ve all been waiting for, folks: the first fusion megaround of 2025. Helion announced this week that it has raised a $425M Series F round. The Washington-based fusion company, famously backed by OpenAI’s Sam Altman, is working to develop commercial fusion on a much shorter timeline than its competitors.   Lightspeed Venture Partners […]

FusionVC/PE

Tokamak Energy Raises $125M 

Tokamak Energy, a UK- and US-based fusion startup working on building—you guessed it—a tokamak, has raised a new batch of funding to support the development of high-temperature superconducting magnets for fusion sector customers. The $125M round was led by East X Ventures and Lingotto Investment Management.  “We are focused on commercializing our transformative HTS technology […]

VC/PE

Radiant Raises $100M Series C

Radiant, the microreactor company building a deployable fission reactor designed to fit on a truck and meet the energy needs of remote and specialized operations, announced on Thursday it raised a $100M funding round. DCVC led the Series C, which also included participation from Andreessen Horowitz, Union Square Ventures, Founders Fund, Decisive Point, McKinley Alaska […]

VC/PE

Antares Raises $30M Series A

Antares, a company building modular microreactors for use on Earth and in space, announced Wednesday that it raised a new batch of funding to forge ahead with development. The $30M Series A round was led by Caffeinated Capital and AltCap. It also included participation from Rogue, Uncommon Capital, Shrug, Banter Capital, Box Group, and Shine […]

FusionVC/PE

Marvel Fusion Raises a €62.8M Series B

It’s a bird, it’s a plane…it’s another high-flying batch of funding for a fusion startup! Last week, Marvel Fusion announced that it has secured a €62.8M ($70.3M) Series B round to support development of its inertial confinement fusion approach.  Frickin’ laser beams: Most of the companies raising funds at this scale to pursue commercial fusion […]