Apollo Atomics
Apollo Atomics is a Cambridge, MA-based nuclear technology company developing a compact pressurized water reactor to provide grid-independent, carbon-free power for data center and AI infrastructure operators, targeting 3¢/kWh with deployment in under 24 months.
- Company typePrivate
- Founded2025
- HeadquartersCambridge, United States
- Headcount1–10
- GTM typeB2B
- OfferingHardware or Manufacturing
What Apollo Atomics does
Apollo Atomics is a Cambridge, Massachusetts-based nuclear technology company developing a compact pressurized water reactor designed to deliver firm, carbon-free, grid-independent electricity to data center and AI infrastructure operators. The core technology is a proprietary reactor architecture claimed to be an order of magnitude more compact than conventional designs, leveraging commercial-grade nuclear fuel with an established supply chain and fully passive safety systems that require no active intervention for safe shutdown. The company traces its technical foundation to 15+ years of research conducted at MIT and is led by co-founder and CEO Assil Halimi, who holds a PhD in Nuclear Engineering from MIT with a decade of reactor design experience, alongside co-founder and COO Drew Walker, whose background spans founding an electric boat company, scaling manufacturing at an electric truck company, and White House operations leadership.
The company pursues a B2B hardware sales model, targeting enterprise customers in the data center and AI infrastructure verticals that require high-reliability, high-uptime, baseload power not subject to grid constraints. Its commercial roadmap begins with a 1 MW demonstrator reactor scheduled for 2027, followed by a 10 MW commercial pilot, with stated targets of 3¢/kWh delivered electricity and deployment timelines under 24 months at scale. As of mid-2026, the company had accumulated 20 GW of signed letters of intent in its commercial pipeline, submitted a regulatory engagement plan to the Nuclear Regulatory Commission (targeting a 2028 construction permit application), and entered a research collaboration with MIT's Department of Nuclear Science and Engineering to run prototypic two-loop experiments supporting NRC licensing. The company is pre-revenue, closed a $500,000 Y Combinator round as part of its Spring 2026 batch, and is not yet shipping product.
Apollo Atomics firmographics
Firmographics- Name
- Apollo Atomics
- Legal name
- Apollo Atomics
- Website
- https://apolloatomics.com
- Company type
- Private
- Founded year
- 2025
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- Apollo Atomics is a Cambridge, MA-based nuclear technology company developing a compact pressurized water reactor to provide grid-independent, carbon-free power for data center and AI infrastructure operators, targeting 3¢/kWh with deployment in under 24 months.
- Ownership category
- akta.pro rank
Apollo Atomics industry classification
Industry- Product category
- Compact Nuclear Power Systems
- NAICS
- Nuclear Electric Power Generation (221113), Electric Power Generation (22111)
- akta.pro primary industry
- Pressurized Water Reactor (PWR) Power Generation (EUACADAA)
- akta.pro secondary industries
- Gen III/III+ Reactor Systems & Components (EUAKADAB), Nuclear Plant EPC & Construction (EUAEAAAC), Reactor Protection, Safety Systems & Engineered Safeguards (ECCS, Containment Isolation) (EUAKADAI)
Keywords
Where Apollo Atomics is headquartered
LocationHeadquarters
- HQ city
- Cambridge
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
Apollo Atomics business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Technology or R&D, Personnel, Operations, Infrastructure, Supply Chain
Revenue model
- Compact Nuclear Reactor Systems: Sale/deployment of compact nuclear power reactor systems to enterprise customers for data center and AI infrastructure power needs. The company targets deployment in less than 24 months with power delivery at 3 cents per kWh.
Go-to-market motion1 record
Distribution channels1 record
Marketing channels3 records
Apollo Atomics product offering
Product offeringCore offering
Apollo Atomics develops and manufactures a proprietary compact pressurized water nuclear reactor system designed to provide independent, carbon-free power for data centers and AI infrastructure operators. The technology is an order of magnitude more compact than conventional nuclear designs, uses commercial-grade nuclear fuel with a passive safety architecture, and targets 3¢/kWh electricity delivery with deployment timelines under 24 months. A 1 MW demonstrator reactor is scheduled for 2027, with plans for 10 MW commercial pilot capacity and scaled commercial deployment backed by 20 GW in signed letters of intent.
Product overview
Apollo Atomics is developing a single unified product line of compact nuclear reactors specifically designed for data center and AI infrastructure power needs. The core offering consists of a compact pressurized water reactor system with a 1 MW Demonstrator scheduled for 2027 to validate the technology, followed by plans for 10 MW Commercial Pilot Capacity and scalable commercial deployments targeting electricity costs of 3¢/kWh with deployment in under 24 months. The company has 20 GW in signed LOIs in their commercial pipeline and over 15 years of research conducted at MIT.
Differentiator
Problem solved
Functional benefit
Products and services
- Compact Pressurized Water Reactor A proprietary compact pressurized water nuclear reactor system designed to deliver independent, carbon-free power to enterprise data center and AI infrastructure operators. Features an order-of-magnitude smaller footprint than conventional nuclear designs, fully passive safety systems, and commercial-grade nuclear fuel. Targets electricity delivery at 3¢/kWh with deployment timelines under 24 months.
- 1 MW Demonstrator Reactor A 1 MW nuclear reactor demonstrator serving as a prototype validation step for Apollo Atomics' compact pressurized water reactor technology. Scheduled for 2027 to validate the architecture before scaled commercial deployment of the 10 MW commercial pilot capacity and beyond.
Quantifiable outcome
- 3¢/kWh electricity cost target
- +3 more outcomes
Companies that use Apollo Atomics
Customer profileSegments2 records
Ideal customer profiles2 records
Apollo Atomics technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature5 records
Apollo Atomics partnerships and signals
Strategic signalPartnerships
Two partnerships are on record, tiered flagship and core.
- MIT Department of Nuclear Science and EngineeringflagshipResearch collaboration to advance experimental testing of Apollo's compact pressurized water reactor. Organizations will conduct two-loop tests under prototypic reactor conditions to generate experimental data for validating Apollo's computational models and supporting its NRC licensing pathway. Company submitted regulatory engagement plan to NRC with 2028 construction permit target.
- Nuclear Regulatory Commission (NRC)coreRegulatory engagement with NRC for licensing pathway. Company submitted regulatory engagement plan to NRC earlier this year, with construction permit application targeted for 2028.
Scale indicators9 records
Recent moves6 records
Expansion highlights6 records
Apollo Atomics competitors and assessment
Company assessmentDirect peers
- X-energy: X-energy is developing high-temperature gas-cooled SMRs (Xe-100) and has signed data center power supply agreements (e.g., with Amazon). It is a directly comparable advanced reactor developer competing for the same hyperscaler and data center customer pipeline.
- TerraPower: TerraPower, backed by Bill Gates, is developing advanced reactor designs (Natrium sodium-cooled fast reactor) and has positioned itself to supply data center and industrial customers with clean baseload power. It is a direct competitor for advanced reactor supply to the AI/data center market, though it uses a different reactor technology.
- NuScale Power: NuScale is the most advanced publicly listed SMR developer using an integrated PWR design intended for utility and data center power. It is directly comparable to Apollo on reactor type (PWR) and SMR category, though it pursues a larger module size and utility-scale customer model.
- Last Energy: Last Energy is developing small modular pressurized water reactors specifically targeted at data center and industrial customers with a behind-the-meter, factory-fabricated deployment model. It is the closest direct peer to Apollo Atomics in terms of reactor type (PWR), target customer (data centers), and compact form factor thesis.
- Oklo: Oklo is developing compact fast reactors and has explicitly targeted data centers and AI infrastructure customers with its Aurora powerhouse design. It competes for the same behind-the-meter data center power thesis and shares a similar regulatory pathway via the NRC.
Broad incumbents
- Holtec International: Holtec is developing the SMR-300, a 300 MWe PWR-based SMR, and has experience in nuclear fuel and spent fuel storage systems. It is a comparable PWR-based SMR developer with established nuclear supply chain relationships.
- BWX Technologies: BWXT manufactures naval and commercial nuclear components and is developing the BANR microreactor for military and remote applications. It is comparable as a nuclear component manufacturer and microreactor developer with deep NRC licensing experience.
- Westinghouse Electric: Westinghouse is the established incumbent in PWR technology (AP1000) and is developing its own eVinci microreactor for remote and off-grid applications. It is a broad incumbent comparable on PWR technology and NRC-licensed reactor expertise, with vastly greater resources.
Regional players
- Rolls-Royce SMR: Rolls-Royce SMR is developing a 470 MWe PWR-based SMR primarily for the UK and European markets. It is comparable as a PWR-based SMR developer but is geographically focused on UK deployment rather than the US data center market Apollo targets.
Emerging players
- Radiant Nuclear: Radiant is developing a compact high-temperature gas microreactor targeted at remote sites, data centers, and defense applications. It is an emerging peer in the compact/micro reactor category with a similar behind-the-meter deployment thesis.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
Apollo Atomics social profiles
Digital presenceApollo Atomics financial estimates
Financial estimateRevenue estimate
Valuation estimate
Apollo Atomics leadership team
Management profileNumber of profiles
Profiles2 records
Apollo Atomics funding detail
Funding detailFunding overview
Funding rounds3 records
Investors18 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Apollo Atomics M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Apollo Atomics
What does Apollo Atomics do?
Apollo Atomics develops and manufactures a proprietary compact pressurized water nuclear reactor system designed to provide independent, carbon-free power for data centers and AI infrastructure operators. The technology is an order of magnitude more compact than conventional nuclear designs, uses commercial-grade nuclear fuel with a passive safety architecture, and targets 3¢/kWh electricity delivery with deployment timelines under 24 months. A 1 MW demonstrator reactor is scheduled for 2027, with plans for 10 MW commercial pilot capacity and scaled commercial deployment backed by 20 GW in signed letters of intent.
Is Apollo Atomics a public or private company?
Apollo Atomics is a private company. It is classified as venture growth investor backed and is currently operating.
When was Apollo Atomics founded?
Apollo Atomics was founded in 2025. It employs 1 to 10 people.
Where is Apollo Atomics based?
Apollo Atomics is headquartered in Cambridge, United States, in the North America region.
How does Apollo Atomics make money?
One revenue line is on record: compact Nuclear Reactor Systems.
Who are Apollo Atomics's main competitors?
Direct peers on record are X-energy, TerraPower, NuScale Power, Last Energy and Oklo. Broad incumbents are Holtec International, BWX Technologies and Westinghouse Electric. Rolls-Royce SMR is listed as a regional player. Radiant Nuclear is listed as an emerging player.
Does Apollo Atomics have an API?
No public API is recorded for Apollo Atomics.
What industry is Apollo Atomics in?
Apollo Atomics's product category is Compact Nuclear Power Systems. Its primary akta.pro industry code is EUACADAA, Pressurized Water Reactor (PWR) Power Generation, with a secondary code of EUAKADAB, Gen III/III+ Reactor Systems & Components. Its NAICS code is 221113.