SpaceX just pulled off one of the largest corporate bond deals in recent memory. The company priced $25 billion in senior unsecured notes on June 23, a cool $5 billion above its original $20 billion target, after investor orders piled up to roughly $90 billion.

Inside the bond structure

The offering spans five tranches with maturities running from 2031 to 2056. Yields range from 5.35% on the shortest-dated notes to 6.65% on the longest.

This marks SpaceX’s first-ever foray into the public bond market. The proceeds have a clear destination: repaying outstanding borrowings under a bridge loan facility tied to the company’s xAI acquisition, covering associated fees, and funding general corporate purposes.

The IPO hangover

This bond pricing comes just 11 days after SpaceX’s IPO on June 12, which raised approximately $85.7 billion. That offering left the company sitting on a cash balance of around $100.8 billion.

But the post-IPO period hasn’t been entirely smooth. SpaceX shares reportedly dropped around 23% in the days following the public listing. The sell-off appears connected to concerns about cash burn rates driven by SpaceX’s aggressive investments in AI infrastructure and its broader expansion plans.

What this means for investors

The xAI connection is particularly relevant. SpaceX using bond proceeds to refinance acquisition debt for an AI company underscores how deeply intertwined the AI and space sectors have become under Elon Musk’s corporate umbrella.

One risk worth flagging: SpaceX now has $25 billion in new fixed-rate obligations layered on top of whatever debt remains from the xAI acquisition and prior financing. The company’s cash position is strong, but fixed interest payments don’t care about stock price fluctuations or whether Starship launches go according to plan.