SpaceX Q3 2026: a blowout guide, a $10 billion quarterly cash burn, and lock-ups ahead

The quarter in brief

SpaceX reported its second quarter as a public company on October 20. It listed in June: the IPO priced 555,555,555 Class A shares at $135.00, with trading on Nasdaq from June 12, 2026 under the ticker SPCX^IPO, and net proceeds were $85,675 million after $575 million of commissions and costs^{10-Q Note 1}.

The third quarter was a step change. Revenue was $14.6 billion, up 161% from $5.6 billion^{p. 1}. The company achieved income from operations of $2.8 billion, net income of $4.4 billion and Adjusted EBITDA of $8.8 billion^{p. 1}. Revenue compared with an LSEG consensus estimate of $12.72 billion^CNBC.

Net income flatters the operating picture. The income statement includes $1,025 million of other income, $873 million of interest income and a $390 million tax benefit^{p. 9}, so pre-tax operating earnings did less of the work than the headline suggests.

Three businesses, three stories

Connectivity (Starlink) is the cash engine. Connectivity revenue was $5.2 billion, up 69% year over year, with consumer revenue up 57% and enterprise and government up 91%^{p. 5}. Segment income from operations rose 99% to $2.4 billion^{p. 5}. Starlink reached 13.6 million consumer subscribers, up 1.6 million in the quarter^{p. 5}, and consumer ARPU improved 5% sequentially to $69 a month^{p. 5}. Note that the subscriber count, renamed from "Starlink Subscribers", does not include managed enterprise and government customers^{p. 8}.

Super Intelligence is the growth, and the uncertainty. This segment is the former xAI, which SpaceX acquired on February 2, 2026^10-Q. SI revenue was $7.6 billion, up 195% sequentially and 830% year over year, driven by new cloud services agreements, the Cursor acquisition and Grok adoption^{p. 6}. Segment income from operations was $431 million after $1.2 billion of share-based compensation tied to Cursor^{p. 6}. The revenue is concentrated and short-dated: the second-quarter 10-Q said the cloud services agreements can generally be terminated by either party on 90 days' notice after an initial period of a number of months^10-Q, and two customers accounted for 18.3% and 19.5% of second-quarter revenue^10-Q.

Space is an investment phase. Space revenue was $1.8 billion, up 6% year over year, with 12 customer launches^{p. 4}. Starship Flight 14 was the first orbital Starship flight, delivering 26 Starlink V3 satellites^{p. 4}. The Space segment lost $7 million at the operating line^{p. 3} as Starship R&D rises.

What changed in the thesis

Guidance moved the debate. The CFO guided total revenue of $33 billion to $37 billion for the first quarter of 2027, citing increased visibility into the compute contract pipeline^Call. The LSEG average estimate had been $22.2 billion^CNBC. He also reaffirmed the goal of $100 billion of annualized revenue, based on December, by the end of this year^Call, and backlog reached $63 billion^Call.

So did capex. Fourth-quarter capital expenditures are now guided at $35 billion to $40 billion^Call. In August, the CFO had said the next two quarters would be "very similar" to the second quarter's capex level^{Q2 call} of about $18.4 billion^{Q2 call}. Third-quarter capex was $19,593 million, of which $16,444 million was in SI^{p. 3}.

Cash burn is large and rising. Over nine months, operating cash flow was $13,097 million against $48,069 million of property and equipment purchases^{p. 12}, about $35 billion of negative free cash flow on our arithmetic. Taking out the first half's $3,466 million of operating cash flow and $28,476 million of purchases^{10-Q cash flow statement} leaves roughly $10 billion of negative free cash flow in the third quarter alone. Cash and marketable securities were $51,294 million and $38,561 million at September 30^{p. 11}, against about $38.8 billion of debt and finance leases^{p. 11}. A $35–40 billion fourth quarter would absorb most of that net cash unless operating cash flow keeps pace.

Supply is coming. The IPO lock-up agreement lets holders transfer an additional 28% of their shares from the second full trading day after the results for the quarter ended September 30, 2026^{Exhibit A, lock-up (d)}, and the regular lock-up ends on the 180th day after the date of the final prospectus^{Exhibit A, p. A-2}, which falls in December. The founder lock-up runs to day 366 and the extended lock-up to the results for the quarter ending June 30, 2027^{Exhibit A, p. A-2}, both inside our 12-month horizon on the usual reporting calendar.

Bull and bear

Elon Musk said on the call that he sees "a lot of merit to combining the companies"^CNBC, according to CNBC. He also said the special committees have not reached agreement on the terms of any transaction^{Call, Q&A}, but for a 12-month call it is a real source of dispersion in both directions.

Valuation

SpaceX had 8,240 million Class A and 5,339 million Class B shares outstanding at September 30^{p. 11}, about 13.6 billion in total. At recent trading prices that is a market value of roughly $2 trillion or a little more. Annualizing the first-quarter 2027 revenue guide gives $132 billion to $148 billion, a $140 billion midpoint. Net of about $51 billion of net cash, that is about 14 to 15 times the midpoint on our arithmetic at recent prices.

That multiple is defensible if the guide is met and compute revenue proves sticky. It leaves little room if either fails, and the cash needs of the build-out make further debt likely. We don't see a margin of safety in either direction.

The call

Neutral on SPCX for 12 months, no price target, low conviction. The quarter was strong and the guide extraordinary, but the outcome depends on short-dated compute contracts, a capex plan that is outrunning cash generation and a lock-up calendar that runs through most of the next year. The range of outcomes is unusually wide, so we would rather be on the record as neutral than pick a direction. We will revisit after the first-quarter 2027 report.

This is the author's opinion, not investment advice. Figures are from SpaceX's Q3 2026 results release, its Q2 2026 10-Q and call, its IPO announcements and lock-up agreement, and the Q3 call; the valuation arithmetic is our own.