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Companies

CesiumAstro

Phased-array communications payloads for satellites

Raised to date

$270.5M

of $270.5M offered across 1 Form D filing

Investors
37
Last filed
Jun 9, 2026

About

CesiumAstro designs and manufactures active phased-array communications payloads, software-defined radios and satellites for space, airborne, ground and maritime use. Founded in 2017 by Shey Sabripour and headquartered in Austin, Texas, it also operates facilities in Broomfield, Colorado, El Segundo, California and the United Kingdom following its 2023 acquisition of TXMission. Its flagship Vireo Ka-band AESA payloads have been selected for Space Development Agency satellite constellations, and it has won a NASA LunaNet lunar communications contract. The company has raised over $150 million in equity across Series A and Series B rounds.

Vertically integrated, software-defined phased-array payloads built in-house on commercial components, which lets multi-beam, reconfigurable satellite communications hardware be produced at constellation scale rather than as one-off custom builds.

Funding

  • EquityFiled Jun 9, 2026Form D
    $270.5M/ $270.5M

Product

Vireo

Satellite communications payload

A family of Ka-band active electronically scanned array (AESA) communications payloads for satellites, including the high-capacity Vireo Ka 576 and the multi-beam Vireo Ka 288.

  • Active electronically scanned array with digital beamforming
  • Multi-beam Ka-band connectivity
  • Software-defined and reconfigurable on orbit

Built for

Government and defense space programs plus commercial satellite constellation operators

People on file