Massachusetts-Based Apollo Atomics Raises $31M in Seed Funding

Apollo Atomics, a Cambridge, MA-based provider of compact pressurized water reactors (PWRs), has raised $31 million in a Seed funding round led by FCVC.

The round also saw participation from Y Combinator, Telesoft Partners, Alumni Ventures, Robinhood Ventures, Nucleation Capital, Pelion VC, Duke Capital Partners, Evan Meagher, Paul Graham, Philip Johnston, Matteo Franceschetti, and Ray Rothrock.

The company plans to use the funding to build its A-1 demonstration facility, expand testing, develop manufacturing capabilities, grow its teams, and advance regulatory work with the US Nuclear Regulatory Commission (NRC).

Funding Snapshot

About Apollo Atomics

Founded in 2025, by Drew Walker, and Assil Halimi, Apollo Atomics is developing compact pressurized water reactors designed to make nuclear power easier to manufacture, transport and deploy.

The company was built on more than 15 years of MIT research and testing. Its core technology is a proprietary compact steam supply system designed to achieve significantly higher power density than conventional reactor designs.

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Apollo says its approach could reduce the overall reactor footprint by roughly 40 times, potentially allowing its reactors to be factory-built, transported by truck, and deployed in less than 24 months.

Core offerings include:

• A-10 10-megawatt electric reactor
• A-50 50-megawatt reactor
• A-300 300-megawatt reactor
• Compact steam supply technology

Core Technologies / Products / Services