SpaceX poured $15.8 billion into AI in one quarter — and its stock fell 10%

SpaceX reported $7.8 billion in revenue for the second quarter, a 92% gain that beat analyst expectations by nearly $1 billion. The number Wall Street focused on was different: $18.4 billion in capital expenditure for the quarter, $15.8 billion of it earmarked not for rockets or satellites but for AI computing infrastructure. The stock fell as much as 10% on the day — SpaceX’s first session as a reporting public company.

The disclosure reframed what investors hold. SpaceX went public earlier this year with a case built on commercial space launch dominance and Starlink’s satellite broadband network. The SpaceX that issued its first earnings quarter is also one of the largest AI infrastructure investors on earth, committing more compute capital in three months than many hyperscalers deploy in a full year.

The capex figure dwarfed analyst estimates of $13.2 billion and represented a sixfold increase on the equivalent quarter a year earlier. Chief Executive Elon Musk described the spending pace as “totally nuts” on the earnings call, then committed to it accelerating. He projected $1 trillion in annual revenue by 2030 — roughly five times the current run rate — and described moon robots as part of the product roadmap. Full-year capital expenditure is now expected to exceed $45 billion.

Beneath the AI number, the underlying businesses showed genuine strength. Starlink’s subscriber count doubled to 12 million. xAI, the artificial intelligence subsidiary that operates the Grok large language model, generated $2.56 billion in revenue — a 247% increase that made it the fastest-growing line in the portfolio. Operating cash flow was positive. The quarter’s $541 million net loss confirmed that SpaceX is simultaneously funding two capital-intensive businesses: one built for orbit, one built for compute.

The scepticism is structural, not episodic. SpaceX’s expected annual capex of more than $45 billion exceeds its entire revenue base from the previous year. The underlying bet — that AI infrastructure returns will arrive fast enough to sustain continued aerospace investment — depends on Grok pricing power holding and no competitor undercutting xAI on cost per token. No AI company at this scale has demonstrated returns commensurate with infrastructure spending at this level. Whether Grok can generate the throughput to justify $15 billion per quarter in compute costs remains an open question, not a settled answer.

The stakeholder map runs wider than the earnings call acknowledged. For semiconductor manufacturers, data center contractors, and the power utilities connected to SpaceX’s Texas and Florida campuses, $15 billion in quarterly compute capex translates to direct revenue. For employees — the company operates with roughly 13,000 staff — the mandate now spans orbital engineering and AI server operations, without a proportional public announcement. For retail investors who purchased during the IPO on the strength of Starlink subscriber growth, the company they hold now competes with Amazon Web Services, Microsoft Azure, and Google Cloud for AI workload share — a market where arriving late to scale is expensive.

SpaceX is scheduled to report third-quarter results in October. Between now and then, the company has committed to two Starship orbital test flights and a commercial launch of in-flight Starlink aircraft connectivity. Those milestones will provide the first operational signal of whether AI spending is compressing or extending the timeline to the profitable space-transport business that the IPO prospectus described.

Tags: Elon Musk, AI infrastructure, SpaceX, xAI, Starlink, tech earnings