Impulse Space Raises $500 Million to Scale Orbital Infrastructure

Impulse Space raised $500 million in a Series D funding round on June 2, 2026, bringing the company's total capital to over $1 billion. The round was co-led by 137 Ventures and Banner VC, with additional participation from Founders Fund, Lux Capital, and Linse Capital, valuing the company at $4.26 billion.

Founded by former SpaceX propulsion engineer Tom Mueller, the company develops propulsion systems and orbital transfer vehicles designed to move payloads after they have been launched. Its current portfolio includes the flight-proven Mira maneuvering spacecraft and the Helios high-energy kick stage, which is scheduled for its first flight in 2027.

Impulse Space intends to use the new capital to scale manufacturing and fill over 200 open positions. This expansion aims to meet increasing demand from commercial entities and government agencies, including NASA's Moon Base initiative and the U.S. Space Force. Analysts attribute the surge in investor interest partly to the recent IPO filing by SpaceX.