Muon Space Closes $250 Million Series C to Scale Space Infrastructure

Muon Space, the Mission Foundry, designing, building, and operating high-performance satellite constellations for National Security, civil, and commercial customers, led by Jonny Dyer, Paul Day, Dan McCleese, Reuben Rohrschneider, and Pascal Stang, has announced the close of a $250 million Series C financing in a heavily oversubscribed round. The round was led by Eclipse Capital, with participation from Galvanize, Google, Salesforce Ventures, Wellington Management, I Squared Capital, and Woven Capital. Existing investors Radical Ventures, Congruent Ventures, Costanoa Ventures, Activate Capital, ACME Capital, ArcTern Ventures, and Overlap Holdings also participated in the round.

The new funding brings Muon’s total equity raised to more than $386 million and will accelerate production of large satellite constellations and expand its dual-use spacecraft platforms. The company will also invest in advanced payloads, on-orbit AI compute, and real-time, high-bandwidth satellite connectivity through its partnership with SpaceX Starlink, targeting growing demand from commercial, government, and sovereign customers.

Muon Space CEO Jonny Dyer said the company is building space infrastructure with a model similar to cloud infrastructure, aiming to help customers deploy complete satellite constellations in months rather than years. The new funding will support the development of next-generation infrastructure for space-based intelligence, communications, and compute.

Eclipse Founder and CEO Lior Susan said Muon is transforming space infrastructure by integrating mission design, manufacturing, launch, and operations into a single platform. He highlighted the company’s shift from bespoke, multi-year projects to a repeatable model designed to scale, with demand growing across commercial, government, and sovereign customers.

A Year of Execution Behind the Raise.

The Series C follows Muon’s most productive period to date. Seven satellites launched in the first half of 2026, bringing the company’s total to 11 satellites across six launches, with a 100% mission success rate. Muon is also bringing two customer constellations online this year: Vindlér 2.0 for SNC, providing RF data and analytics, and FireSat, a wildfire-monitoring constellation developed with Earth Fire Alliance and Google.org.

Muon recently opened an advanced manufacturing facility in San Jose with capacity to produce up to 500 satellites annually by 2027—10× its previous capacity.

The company now has more than 50 satellites in development for customers, including 13 already scheduled for launch over the next year.

The Mission Foundry Model.

Traditional space companies typically provide spacecraft or individual components. Muon’s Mission Foundry integrates mission design, spacecraft, payloads, software, operations, and data into a single platform, allowing customers to deploy complete, mission-ready constellations in months rather than years.

With the Series C complete, Muon plans to expand production, accelerate new spacecraft platforms, invest in mission-enabling technologies and payloads, and scale the Mission Foundry to meet growing demand across commercial, national security, and sovereign markets.

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