Company

Antares

Rocket Ship Rating

Rocket Ship Rating: 99 out of 100

Abundant energy from Earth to the asteroid belt.

Also known as Antares Nuclear, Antares Nuclear, Inc.

Clean energy & storage
Space, aerospace & defense
Deeptech
Hardware

Status: Operatingas of 2026-09-17
Business model: Government
Customers: defense-critical assets
Legal name: Antares Nuclear, Inc.

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Record updated 28 September 2026

About

Fission microreactors to enable strategic energy for critical mission capabilities on Earth, in space, and underwater.

Funding snapshot

Total raised: $86.7MSEC form D sum, as of 2026-09-28Source (opens in a new tab)
Latest round: Round, $60M2026-08-03

Funding rounds

Round, 2026: $60M2026-08-03, SEC form D sold, 13 investors
Round, 2026: $320M2026-07-08, SEC form D sold, 24 investors
Round, 2025: $51M2025-09-10, SEC form D sold, 31 investors
Round, 2024: $27.5M2024-09-24, SEC form D sold, 10 investors
Round, 2023: $8.1M2023-10-13, SEC form D sold, 44 investors

Products

Hardware: R1 Microreactor