SpaceX just won a second Golden Dome contract. This one is $4.16 billion.

Two days earlier, the Space Force awarded SpaceX $2.29 billion for the Space Data Network Backbone, a secure communications layer built on Starshield satellites. Combined, SpaceX now holds approximately $6.45 billion in Golden Dome contracts. That figure exceeds the combined prototype awards given to every other company in the programme.

The AMTI satellites are designed as an interconnected system combining space-based sensors, secure communications links, and AI-enabled ground processing. The system will detect, track, and alert for airborne threats from orbit. The US has historically relied on ground-based sensors and military aircraft for this function.

Placing detection capabilities in space eliminates potential blind spots that ground-based systems cannot cover. The Space Force described the architecture as designed to “drive closer cooperation across the government space industrial base.” SpaceX must integrate the AMTI sensors with the data transport backbone it is already building under the separate $2.29 billion contract.

The scale of SpaceX’s Golden Dome position is unprecedented for a commercial contractor. The programme has distributed more than $3.2 billion in prototype contracts across SpaceX and 11 other firms, including Anduril, Lockheed Martin, Northrop Grumman, Raytheon, and True Anomaly. SpaceX’s $4.16 billion AMTI contract alone exceeds that entire prototype pool.

SpaceX filed its IPO prospectus last week, targeting a valuation of more than $1.75 trillion. The company is expected to raise approximately $75 billion in what would be the largest IPO in history. Every new defence contract adds to the revenue narrative that underpins the listing.

The timing is notable. Two major Golden Dome contracts awarded in the same week as a Starship V3 test flight and an IPO roadshow preparation creates a cadence that looks orchestrated to maximise pre-IPO momentum. SpaceX held more than $22 billion in government contracts as of 2024. The Golden Dome awards add meaningfully to that base.

The Golden Dome programme’s total cost has risen to $185 billion, up $10 billion from the original estimate, after the programme director approved an acceleration of space-based capabilities in March. The fiscal 2027 budget request includes initial Golden Dome funding. Full-scale procurement is expected to begin post-2028.