Startup profile · funding coverage
CesiumAstro funding, valuation and investors
Software-defined phased-array satellites and comms payloads for space, air, and defense missions.
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Funding, valuation & investors
Answer-first snapshotLatest funding
Series B+
$65M · June 2024
Latest known valuation
Not publicly disclosed
Total disclosed equity funding
$65M
Excludes debt, grants, acquisitions, secondaries, and IPO proceeds.
Current status
private
growth · Austin, TX
Investors in latest funding
Lead: Trousdale Ventures
Latest tracked event: Series C (equity + debt) (February 2026). It is shown separately because it is not counted as disclosed equity funding.
Overview
CesiumAstro designs, builds, and manufactures software-defined phased-array communications for satellites, UAVs, and ground terminals. Its integrated product lines include Vireo and Nightingale Ka-band payloads, the Element satellite platform, and mobile SATCOM terminals — sold to commercial constellation operators and U.S. defense customers. Founded in 2017 by Shey Sabripour in Austin, the company vertically integrates AESA antennas, software-defined radios, and onboard processing. In February 2026 it closed $470M in growth capital ($270M equity led by Trousdale Ventures plus $200M EXIM/J.P. Morgan debt) to scale U.S. manufacturing and accelerate on-orbit validation.
Why CesiumAstro is interesting
CesiumAstro's $470M Series C — $270M equity plus $200M EXIM debt — funds a 270,000 sq ft Austin HQ and eight SpaceX rideshare launches, signaling capital is backing dual-use satcom manufacturing, not just constellation software.
Product & use cases
CesiumAstro builds active electronically steered array (AESA) phased-array antennas, software-defined radios, and fully integrated satellites (Element platform) for multi-beam, multi-user connectivity across LEO and defense missions.
- LEO constellation operators needing high-throughput Ka-band interconnect payloads
- DoD and allied programs requiring software-defined, beam-steered SATCOM without mechanical gimbals
- Air and ground mobile terminals for beyond-line-of-sight communications
Key facts
- Series C (Feb 2026): $470M total — $270M equity + $200M EXIM/J.P. Morgan debt (company press release)
- Equity led by Trousdale Ventures; participants include Woven Capital, Airbus Ventures, Janus Henderson
- Eight SpaceX rideshare launches secured; building 270,000 sq ft headquarters in Austin
- Product lines: Vireo, Nightingale, Skylark payloads and Element integrated satellite platform
- Prior Series B+ (Jun 2024): $65M also led by Trousdale Ventures
Funding history (newest first)
Series C (equity + debt)
2026-02 $470M ($270M equity + $200M debt)- Trousdale Ventures (lead)
- Woven Capital (participant)
- Airbus Ventures (participant)
- Janus Henderson Investors (participant)
Source: Read source · cesiumastro.com
Competitive landscape
Edge: Vertically integrated U.S. manufacturing of software-defined payloads lets CesiumAstro adapt waveforms and beams in firmware — faster iteration than legacy radome-based satcom primes, with dual-use commercial and defense sales from one product line.
Space comms hardware is shifting from bespoke primes to modular, software-defined payloads that can serve both Starlink-era constellations and defense buyers. CesiumAstro competes on manufacturing scale and dual-use GTM; legacy incumbents retain program-of-record advantages but move slower on beamforming agility.
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Rocket Lab (Space Systems) adjacent
End-to-end space systems including buses and components; overlaps on integrated satellite offerings.
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Kratos Defense incumbent
Legacy defense SATCOM and ground systems; slower software-defined iteration but entrenched procurement relationships.
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Viasat incumbent
Established satcom operator and payload supplier; larger installed base but less modular for proliferated LEO.
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Mynaric direct
Laser and RF optical interconnect for space; competes on next-gen constellation backhaul.
Notable stories
- CesiumAstro secured a first-of-its-kind $200M EXIM/J.P. Morgan debt package under the 'Make More In America' initiative alongside its equity round — a public-private manufacturing bet rare for space startups (company press release, Feb 2026).
- Founder Shey Sabripour previously led Cisco's millimeter-wave radio team before starting CesiumAstro to industrialize phased-array production for proliferated orbits.
Industries
Market / IPO context
Editorial / static context — not a live quote.
Related funding articles
Venture Capital Tracker pieces that cover CesiumAstro's financing or category context.
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