Muon Space raised $250 million in a Series C funding round to accelerate its transition from manufacturing small satellites to developing larger, more capable vehicles able to perform missions requiring high power and computing capacity. The company, headquartered in Mountain View, California, announced that it closed the round on August 20, led by Eclipse Capital.
Muon declined to disclose its post-round valuation, but a source cited by SpaceNews said the funding valued the company at $1.5 billion. That places Muon among a wave of private space companies that have surpassed the $1 billion valuation threshold after funding, according to the article.
From Small Satellites to Larger Platforms
The company, which was founded five years ago, has deployed 11 satellites to date, including three satellites launched this year for a system monitoring wildfires in low Earth orbit, which it is developing in partnership with the nonprofit Earth Fire Alliance. Muon says it has more than 50 satellites under development for customers, with 13 of them reserved for launches over the next year.
Company President Greg Smirin also confirmed that contracts have recently been signed for more than 12 vehicles linked to commercial customers and U.S. government entities, although their names have not yet been disclosed.
The satellites Muon has deployed so far are concentrated on platforms weighing approximately 200 kilograms or less. But next year it plans to deploy its first 500-kilogram MuSat XL vehicle for Seattle-based Hubble Network. Hubble Network is working on a constellation of 60 satellites intended to connect up to 1 billion Bluetooth devices directly from space around the world.
Greater Production Capacity and a Platform for Orbital Data Centers
Muon recently opened a manufacturing facility in San Jose that, according to its design, will be capable of producing up to 500 satellites annually by 2027. This capacity represents a tenfold increase compared with its previous capability.
In June, the company unveiled a larger platform called Condor-Ultra, which belongs to the Starship class. The platform initially provides a baseline capacity of 20 kilowatts, along with more than 18 square meters of lower payload space, to meet emerging demand for orbital data centers. Muon is targeting its first launch in 2028, after securing customers whose names it did not disclose.
What Sets Muon’s Model Apart?
The funding brings Muon’s total equity financing to more than $386 million and supports its investments in vertical integration, including its acquisition last year of the space propulsion startup Starlight Engines.
Muon says it carries out 95% of its vehicle production in-house through its Mission Foundry model, which combines mission and vehicle design, payloads, software, operations, and data within a single system. According to Smirin’s explanation, this model starts with the mission and customer requirements rather than relying on a standardized satellite bus to which the mission must be adapted.
In practice, this approach gives the company room to optimize the orbit, power, processing, guidance, payload, and operations as a single unit. Its expansion also comes amid notable funding activity in California’s satellite manufacturing sector; Apex Space and K2 raised a combined $700 million in rounds that valued them at $2.3 billion and $6.8 billion, respectively.
Participants in Muon’s round included Galvanize, Google, Salesforce Ventures, Wellington Management, I Squared Capital, and Woven Capital, alongside existing investors Radical Ventures, Congruent Ventures, Costanoa Ventures, Activate Capital, ACME Capital, ArcTern Ventures, and Overlap Holdings.