The round was led by Trousdale Ventures, with matching participation from Development Bank of Japan and Quanta Computer. Renowned investors, including Kleiner Perkins, Lavrock Ventures, L3Harris Technologies, InMotion Ventures (JLR's investment arm), Matter Venture Partners, MESH Ventures, and Assembly Ventures, also joined the round.

CesiumAstro builds high-throughput, software-defined phased array communication payloads for airborne and space platforms including satellites, missiles, UAVs, and more. Cesium's full-stack, multi-mission hardware and software products enable a range of commercial, government and defense objectives. CesiumAstro provides full in-house design, manufacturing and testing capabilities based on the ISO AS9100 standard.