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

The US Space Force awarded SpaceX a $4.16 billion contract on Friday to build satellites that track foreign aircraft and missiles. The programme is called Space-Based Advanced Moving Target Indicator, or SB-AMTI. It is part of the Trump administration’s $185 billion Golden Dome missile defence initiative.

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.

True Anomaly raised $650 million in April after being selected for Golden Dome space-based interceptor prototypes. Anduril raised $5 billion at a $61 billion valuation. Both are working on separate Golden Dome layers. But neither holds a position comparable to SpaceX’s combined sensing, tracking, and communications role.

The conflict-of-interest concerns that have surrounded SpaceX’s government contracting are amplified by the Golden Dome awards. Elon Musk is simultaneously the largest financial backer of the sitting president, the CEO of the company receiving the contracts, and the owner of a social media platform that shapes public discourse about the programme. The IPO prospectus acknowledges government contract risk but does not address the political dimensions directly.

Friday’s Starship V3 test flight demonstrated that SpaceX can deploy satellites from the vehicle, even though the Super Heavy booster was destroyed after separation. The AMTI constellation will eventually require launch capacity that only Starship can provide at scale. The contract, the IPO, and the rocket programme are three legs of the same strategy.

Two contracts, $6.45 billion, four days. SpaceX is not just participating in Golden Dome. It is becoming the programme’s commercial backbone. Whether that concentration of national security infrastructure in a single pre-IPO company is a strategic advantage or a systemic risk is a question the Space Force has implicitly answered by signing the contracts. The market will answer it again when the IPO prices in June.