Impulse Space

Overview

Impulse Space builds the Mira and Helios vehicles, which move satellites from where a rocket drops them to the orbits they actually need. Founder Tom Mueller was SpaceX's first employee and led propulsion for nearly two decades, designing the Merlin engine family.

Impact

• Provides orbital transfer services to commercial and national security customers

Funding

At least: ~$525M through 2025 plus a $500M Series D (June 2026). Reported valuation: $4.26B (Jun 2026).

Disclosed funding is the sum of publicly reported rounds found in the sources below. It is a floor, not a complete total.