Impulse Space builds spacecraft that move satellites and cargo to their target orbits after launch.[1] Tom Mueller, a SpaceX founding member and former chief technology officer, founded it in 2021.[1] Its vehicles include the Mira spacecraft and the Helios kick stage.[2] Helios is designed to take payloads directly to geostationary orbit without a transfer orbit.[3] Mira has flown multiple missions, including autonomous rendezvous and proximity operations.[4] The company is based in Redondo Beach, California, and has facilities in Boulder, Colorado, Washington, D.C., and a test site in Mojave, California.[4] Korea's Hanwha Asset Management also joined the extension.[1] It is using the extension for product development and team growth.[5]
Its government work includes a National Security Space Launch Phase 3 Lane 1 contract for the Helios upper stage.[2] In September 2026 the U.S. Space Force awarded it a $28 million contract for a space domain awareness mission using a Mira spacecraft.[2],[5] The company says it more than doubled its headcount over the past year.[4]
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| Date | Round | Amount | Valuation | Lead investors | Source |
|---|---|---|---|---|---|
| Sep 16, 2026 | Series D | $308M | $5.4Bpost-money | — | Investing.comPulse story |
| Apr 8, 2026 | Funding roundnot counted | $499.8M | — | — | SEC EDGAR Form D |
Equity only. “Equity raised” above sums the rounds with a dated, linked source; rumored rounds, tender offers and secondary sales are listed but not counted, and debt financing is listed separately.
Impulse raised a $20 million seed round led by Founders Fund in March 2022, followed by $10 million from Lux Capital.[6],[7] It raised a $45 million Series A led by RTX Ventures in July 2023.[3] Its $150 million Series B, led by Founders Fund in October 2024, brought total funding to $225 million.[8] Its $300 million Series C, led by Linse Capital in June 2025, brought total capital raised to $525 million.[9] In June 2026 it raised a $500 million Series D co-led by 137 Ventures and BANNER VC, taking total capital raised above $1 billion.[4] A $308 million extension in September 2026 brought the Series D to $808 million.[5]
Impulse raised a $20 million seed round led by Founders Fund in March 2022, followed by $10 million from Lux Capital.[6],[7]
In June 2026 it raised a $500 million Series D co-led by 137 Ventures and BANNER VC, taking total capital raised above $1 billion.[4]
Impulse Space is based in Redondo Beach, California, and has facilities in Boulder, Colorado, Washington, D.C., and a test site in Mojave, California.[4]
Impulse Space builds spacecraft that move satellites and cargo to their target orbits after launch.[1]
Impulse Space was last valued at $5.4B in its September 2026 Series D, according to Investing.com (September 16, 2026).
Impulse Space was founded in 2021 and is headquartered in Redondo Beach, California, USA, according to SEC EDGAR Form D.
Figures are labelled Reported (a source states it), Estimated, Derived (computed from other facts) or Rumored (in talks / unconfirmed). Rumors never replace a confirmed figure. Each figure keeps its own as-of date; history is preserved rather than overwritten.