Impulse Space
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Investors
Founders
About
Impulse Space is a Redondo Beach, California-based in-space mobility infrastructure company founded in September 2021 by Tom Mueller — the SpaceX propulsion-engineering veteran widely credited with developing the engines that propelled SpaceX to the top of the launch industry 123. President and COO Eric Romo and COO Barry Matsumori (ex-SpaceX, Virgin Orbit) round out the leadership team; the company builds maneuverable orbital transfer vehicles and in-space propulsion systems to move payloads between orbits and to extend satellite lifetimes 123. The $500M Series D announced June 2, 2026 was co-led by 137 Ventures and BANNER VC at a $4.26B post-money valuation, with participation from Founders Fund, Lux Capital, and Linse Capital; the round brings total funding above $1B and will fund headcount expansion of up to 200 new employees, focused on engineering hires rather than AI automation 123.
Funding History
| Date | Round | Amount | Lead | Co-investors |
|---|---|---|---|---|
| 2026-06-02 | Series D (at $4.26B post-money val) | $500M | 137 Ventures, BANNER VC | Founders Fund, Lux Capital, Linse Capital 12345 |
What Investors Say
“Tom helped transform access to space at SpaceX, and now he’s tackling the industry’s next major challenge: in-space mobility.”
— Justin Fishner-Wolfson, Founder & Managing Partner, 137 Ventures 4
“As activity in orbit increases, in-space mobility becomes foundational.”
— Adam Ramada, BANNER VC 4
What Founders Say
“When it comes to solving engineering problems in the real world, deep learning models aren’t quite ready for prime time.”
— Eric Romo, President & COO, Impulse Space 1
“We’re building more than spacecraft: we’re building the economic and technical engine that will power humanity’s expansion into space.”
— Tom Mueller, Founder & CEO, Impulse Space 4
Sources
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TechCrunch, “Rocket engine startup Impulse raises $500 million to hire people, not AI,” June 2, 2026. Accessed June 2026. https://techcrunch.com/2026/06/02/rocket-engine-startup-impulse-raises-500-million-to-hire-people-not-ai/↩↩↩↩↩
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GlobeNewsWire, “Impulse Space Raises $500M Series D to Build In-Space Mobility Infrastructure for the Space Economy,” June 2, 2026. Accessed June 2026. https://www.globenewswire.com/news-release/2026/06/02/3305111/0/en/impulse-space-raises-500m-series-d-to-build-in-space-mobility-infrastructure-for-the-space-economy.html↩↩↩↩
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SpaceNews, “Impulse Space raises $500 million,” June 2, 2026. Accessed June 2026. https://spacenews.com/impulse-space-raises-500-million/↩↩↩↩
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Impulse Space press release, “Impulse Space Raises $500M Series D to Build In-Space Mobility Infrastructure for the Space Economy,” June 2, 2026. Accessed July 2026. https://www.impulsespace.com/updates/impulse-space-raises-500-million-dollar-series-d-to-build-in-space-mobility-infrastructure-for-the-space-economy↩↩↩↩
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Payload Space, “Impulse Space Closes $500M Series D,” June 2, 2026. Accessed July 2026. https://payloadspace.com/impulse-space-closes-500m-series-d/↩