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CesiumAstro secures $730M in Series D led by Janus Henderson at a $4.5B+ valuation. The satellite company unveiled its Synchronicity constellation following successful Element-1 mission.

PRIVATENov 05, 2026

Amount Raised

$730 Million

Round Type

Series D

AustinManufacturingInformation Technology

Investors

Janus Henderson

Description

CesiumAstro closed a $730 million Series D funding round led by Janus Henderson, achieving a post-money valuation exceeding $4.5 billion. The funding supports the company's development of its Synchronicity satellite constellation for global connectivity. CesiumAstro's Element-1 mission completed successfully, validating the company's satellite technology. The capital will accelerate deployment and commercialization of the constellation.

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Company Information

Company

CesiumAstro

Location

13215 Bee Cave Parkway Suite A-300

Austin, Texas, United States

About

Headquartered in Austin, Texas, with offices in Broomfield, Colorado, CesiumAstro builds high-throughput, plug-and-play active phased array communication payloads for airborne and in-orbit platforms. Cesium’s full-stack, multi-mission hardware and software products enable a range of commercial and defense objectives. For more information, visit: cesiumastro.com.

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CesiumAstro raised. Fundz records a round at a median of 3.6 minutes from the SEC filing, with the decision-maker attached.

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