CesiumAstro is a US-based company founded in 2017 that specializes in developing advanced communication systems for space and airborne platforms, including active phased array antennas and software-defined radios. They provide full-stack, multi-mission hardware and software products that enable high-throughput connectivity and data transmission. CesiumAstro partners with organizations like NASA, the Space Development Agency (SDA), the U.S. Air Force, Axiom Space, and commercial entities to deliver next-generation connectivity solutions. Their key products include the Nightingale, Vireo, Skylark, and Element, and they focus on innovations in satellite communications, lunar communications, and inter-satellite links.
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Proceeds from the Series C will support scaled production of Element, CesiumAstro’s fully integrated LEO satellite.
Proceeds from the Series C will support expanded manufacturing capacity and the accelerated deployment of CesiumAstro’s software-defined, AI-enabled space communications platforms worldwide.
CesiumAstro plans to construct a 270,000-square-foot headquarters facility near Austin, Texas to expand manufacturing capacity and integration space for satellites, payloads, and advanced computing systems.
CesiumAstro's $470 million Series C combines $270 million in equity funding led by Trousdale Ventures and $200 million in financing from the Export-Import Bank of the United States and J.P. Morgan structured under EXIM's Make More In America initiative.
CesiumAstro intends to deliver resilient, AI-enabled communications to enable connect, detect, and defend capabilities at global scale.
CesiumAstro Inc. secured $470 million in new growth capital in its Series C financing round.
CesiumAstro will scale production of Element, its fully integrated low Earth orbit satellite platform.
CesiumAstro raised a total of $470 million across two funding buckets in the recent financing.
CesiumAstro’s recent equity round brings the company’s total venture funding to upwards of $420 million since 2017.
CesiumAstro will use the new funding to cement additional defense-sector contracts and build out its national security business.
CesiumAstro completed a $65 million Series B+ in June 2024 that was led by Trousdale Ventures.
CesiumAstro built its business on communications terminals that enable satellites to communicate with one another and with the ground.
CesiumAstro secured eight SpaceX rideshare launches to accelerate on-orbit validation of its first fully integrated satellite.
Equity participants in CesiumAstro's Series C round include Woven Capital, Janus Henderson Investors, Airbus Ventures, the Development Bank of Japan Inc., MESH, and NewSpace Capital.
CesiumAstro's in-house design, manufacture, and test processes comply with AS9100D and ISO 9001:2015 standards.
CesiumAstro is positioning its technology to support the Space Development Agency’s Proliferated Warfighter Space Architecture and other defense-geared constellations.
Shey Sabripour is the CEO of CesiumAstro.
CesiumAstro closed a $270 million funding round in early 2026.
CesiumAstro's vertically integrated product approach spans satellites, high-performance communications payloads, and advanced onboard processing designed for software-defined, AI-enabled communications architectures.
The first Element satellite is scheduled to launch later in 2025 and is funded partially by CesiumAstro and partially through a U.S. Space Force Strategic Funding Increase (STRATFI).