SpaceX S-1 filing: 5 massive revelations from historic IPO paperwork

SpaceX's S-1 filing reveals a $737 billion potential pay package for Musk tied to a Mars colony milestone. On Wednesday, SpaceX filed its S-1 with the Securities and Exchange Commission the formal paperwork that opens the door to a public market debut.

The filing didn't include a share price or valuation estimate; those come later in the IPO process. What it did reveal was stranger and more consequential.

5 massive revelations from SpaceX's S-1 filing

The S-1 is a compensation structure with no precedent in corporate history is the most important part of this filing. Musk stands to receive roughly $737 billion in equity if two performance milestones are achieved.

The larger award, approximately $583 billion, consists of one billion shares that vest only if SpaceX reaches a $7.5 trillion market capitalisation and establishes a permanent human colony on Mars with at least one million inhabitants. The shares would be distributed across 15 separate tranches.

A second award of approximately 302 million shares, valued at roughly $154 billion, is tied to SpaceX operating orbital data centres delivering 100 terawatts of compute annually, alongside a separate $6.6 trillion market cap milestone.

One of the most directly relevant disclosures in the filing refers to an important business deal between two of the most influential AI companies around today. 

The AI safety company Anthropic will pay SpaceX $1.25 billion monthly in exchange for compute capacity starting May 2026 to May 2029. The total contract value is about $15 billion.

In Q1 of 2026, the AI division of SpaceX, including xAI’s Grok, expended $7.72 billion. Meanwhile, the space division, involving the Super Heavy rocket and Starship project, expended $1.05 billion in the same quarter.

It continued in 2025, where the AI division expended $12.73 billion compared to $3.83 billion by the space division.