Impulse Space’s Helios Domes (photo by Impulse Space)

Space transportation company Impulse Space raised a staggering $300 million in a Series C funding round led by Linse Capital. The cash haul ranks as one of the largest venture rounds in the history of the space industry and brings Impulse’s total capital raised to $525 million.

Established in 2021 by SpaceX founding member Tom Mueller, the architect behind SpaceX’s Merlin engine family, Impulse quickly went to market with its Mira maneuverable space vehicle for payload hosting and deployment. The company racked up 30 contracts worth nearly $200 million. It is currently developing its Helios high-energy kick stage payload delivery system for MEO, GEO, and beyond with a goal to launch in 2026. Impulse is also developing a customizable GEO Rideshare Program, set to debut in 2027.

“We’ve proven that we can build fast and fly successfully. Now, the market is demanding more,” said Mueller, CEO and founder. “This raise helps us scale production and technical capabilities to meet that demand head-on.”

In addition to Linse Capital, Impulse’s Series C funding round also included participation from DFJ Growth, Valor Equity Partners, Founders Fund, Lux Capital, RTX Ventures, DCVC, Airbus Ventures, Spring Tide, First Principles Group, Balerion Space Ventures, Tamarack Global, and Trousdale Ventures.

“Impulse is tackling one of the most technically demanding challenges in aerospace with a speed and precision we rarely see,” said Bastiaan Janmaat, Managing Partner at Linse Capital. “Their vertically integrated approach, proven track record, and ability to execute quickly in this market give them a real advantage. We’re excited to support their vision as they build the infrastructure that will power the next generation of space missions.”