Element is a general-purpose satellite built with CesiumAstro’s software-defined communications and high-performance computing payloads. Credit: CesiumAstro

TAMPA, Fla. — CesiumAstro is in the middle of a Series D funding round to support the phased-array antenna specialist’s transformation into a constellation operator.

The Texas-based company told SpaceNews the round was already oversubscribed as it announced the purchase of mission software specialist 1Aardvark Aug. 25, marking its third acquisition in less than a year to bring more capabilities in-house.

While CesiumAstro has not disclosed its valuation, which a source previously said crossed the $1 billion threshold with a $270 million Series C disclosed in February, the company said the latest round will raise it from its current level.

Venture capital firm Trousdale Ventures led the Series C round, which came alongside $200 million in debt financing from JP Morgan and the U.S. Export-Import Bank’s Make More in America initiative.