Impulse Space announced a $308 million Series D extension on Sept 16, 2026, bringing the round to $808 million at a $5.6 billion valuation, with Lux Capital, DFJ Growth and Valor Equity. Its Helios upper stage was selected for a US Space Force NSSL Phase 3 Lane 1 position.
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Impulse Space adds $308M Series D extension, round now totals $808M
Why this matters for founders
Space and defense-tech founders can read the growing in-space mobility funding and government contracts as market validation for orbital-logistics ventures.
Source: Impulse Space (GlobeNewswire)
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