# CesiumAstro raises $730 million for a 737-satellite orbital network

- Published: 2026-11-06 17:15 UTC
- Section: Sky & Space › Space
- Tags: CesiumAstro, Synchronicity constellation, satellite internet, phased array antennas, low Earth orbit, Series D funding
- URL: https://realtech.media/news/rt-3d4e033e9e414a3ab8c91c44_cesiumastro_raises_730/

**CesiumAstro secured $730 million in Series D funding to build and deploy its own 737-satellite Synchronicity constellation.**

![CesiumAstro raises $730 million for a 737-satellite orbital network](https://sgzwpqqelzmajkcubgkl.supabase.co/storage/v1/object/public/rt-media/2026/11/45fdd8cf4af051a9.jpg)
*Ventureburn*

CesiumAstro has raised $730 million in a Series D funding round led by Janus Henderson, valuing the Austin-based company at more than $4.5 billion, Ventureburn reported [1]. The investment was joined by Insight Partners, Sands Capital, Sumitomo Corporation of America, Toyota's Woven Capital, Magnetar, and other participants, while JPMorgan and the Export-Import Bank of the United States provided an additional $100 million in debt [1]. The funding will back Synchronicity, a planned constellation of 737 satellites to serve commercial, sovereign, and defense customers [1].

## Orbit architecture and frequencies

The planned Synchronicity network will operate in low Earth orbit at two different altitudes, utilizing Ku-, Ka-, and V-band radio frequencies [1]. The spacecraft are designed to process data directly onboard, using automated algorithms to manage traffic and system capacity [1]. CEO Shey Sabripour stated that customers seek sovereignty over their orbital systems, adding that the platform can access radio frequencies beyond those approved for Starlink or Amazon's Leo [1].

CesiumAstro's demonstration satellite Element-1 was launched in October on a SpaceX Falcon 9 rideshare mission and is operational [1]. Seven additional spacecraft currently have booked launches [1].

## Production expansion and acquisitions

The company plans to invest $500 million over five years into its Austin facility, which includes roughly 270,000 square feet of advanced manufacturing space [1]. The project is slated to add 550 roles, increasing local headcount beyond 1,000 employees by 2030 [1]. CesiumAstro also operates facilities in the United Kingdom, Germany, Switzerland, Taiwan, Singapore, and Japan [1].

To achieve vertical integration, CesiumAstro acquired three firms over the past year: millimeter-wave chip developer Jariet Technologies, mission software developer 1Aardvark, and signal analysis firm Vidrovr [1]. Earlier this year, the company secured a $470 million Series C round, bringing its total announced capital in 2026 to more than $1.2 billion [1].

## Sources

1. [Ventureburn](https://ventureburn.com/cesiumastro-raises-730-million-ai-737-satellite-constellation)

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Source: RealTech, realtech.media — https://realtech.media/news/rt-3d4e033e9e414a3ab8c91c44_cesiumastro_raises_730/