SpaceX just landed a $4.16 billion contract from the US Space Force to build a space-based surveillance system capable of tracking and targeting airborne threats globally. The contract, announced on May 29, falls under a program called the Space-Based Airborne Moving Target Indicator, or SB-AMTI, and it represents a serious escalation in the company’s role as a defense contractor.
To put that number in perspective: $4.16 billion is nearly double the $2.29 billion contract SpaceX received just three days earlier for a separate Space Data Network Backbone program. In the span of a single week, Elon Musk’s rocket company added roughly $6.45 billion in new government defense work to its books.
What SB-AMTI actually does
The SB-AMTI program aims to build a constellation of satellites designed to identify and track moving airborne targets, including aircraft and cruise missiles, from space. The “targeting” part is key here. This isn’t just passive surveillance. The system is intended to feed targeting data into the broader US military kill chain.
The broader context matters too. The US Space Force initiated a multi-vendor approach to SB-AMTI back in April 2026, awarding initial contracts to nine different vendors for early-stage capability development. SpaceX winning the $4.16 billion production contract suggests its proposal outperformed the competition, or at minimum, that the Space Force sees SpaceX’s satellite manufacturing and deployment infrastructure as the most viable path to fielding the system quickly.
