Apollo Atomics, Inc.

We make the most compact nuclear machines.

Y CombinatorSpring 2026ActiveIndustrialsEnergySmall Modular ReactorsManufacturing

What they do

Problem

Organizations need compact, practical nuclear systems to deliver high-energy output where size and space are constrained.

Solution

Apollo Atomics, Inc. builds highly compact nuclear machines.

Who it's for

Industrial, research, or government customers who require compact nuclear equipment.

Founders

Assil Halimi

Founder

Founder at Apollo Atomics, Inc. (YC P26). PhD in Nuclear Engineering from MIT with 15 peer-reviewed publications and 2 patents on reactor design and fuel optimization. Previously reactor operator at Engie (Belgium's nuclear operator) and advanced reactor designer at EDF (world's largest nuclear operator). Worked with Westinghouse, NuScale, Rolls-Royce on PWR development.

Drew Walker

Co-Founder/COO

Co-Founder & COO of Apollo Atomics (YC P26). He previously co-founded Blue Innovations Group, an electric boat startup, and served in the White House. He holds a B.A. in Political Science from George Washington University.