SpaceX’s Starlink had 13.6 million consumer subscribers at the end of September, 5.9 times the 2.3 million it had at the end of 2023, by our arithmetic on its S-1 and 10-Q. Over the same stretch, average revenue per user fell 30%, from $99 a month in 2023 to $69 in the third quarter.
An evergreen Business Engineer explainer on year-over-year comparisons, the basis of the subscriber and ARPU changes in this piece. It teaches the general idea only and does not discuss Starlink.
The key insight: As we read SpaceX’s filings, Starlink has traded price for reach: 5.9 times the subscribers it had at the end of 2023, each paying 30% less a month, and net additions of 1.4 million or more in each of the last four quarters, by our arithmetic.
The S-1 lists Starlink subscribers of 2.3 million at the end of 2023, 4.4 million at the end of 2024 and 8.9 million at the end of 2025, with ARPU of $99, $91 and $81 a month in those years. The 10-Q says the metric is now called Starlink consumer subscribers, “previously referred to as Starlink Subscribers”.
By quarter, ARPU was $86, $85 and $83 in the first three quarters of 2025, then $66 in each of the first two quarters of 2026 and $69 in the third. The $3 rise, 4.5% by our arithmetic, followed two quarters at $66. The 10-Q puts the year-on-year decline at 16.9%, “as we expanded internationally and added lower-priced service plans”.
Starlink subscribers at period end and ARPU, indexed to 2023, from SpaceX’s S-1 and its third-quarter 10-Q; 2023 ARPU is the full-year average, and the index and multiples are our arithmetic.
1.6 Million Net Additions in a Quarter
Starlink added about 1.6 million net subscribers in the third quarter, from 12.0 million at the end of June, about 17,400 a day, by our arithmetic. Net additions were 1.7 million in the fourth quarter of 2025, 1.4 million in the first quarter of 2026 and 1.7 million in the second, against 1.0 million and 1.2 million in the second and third quarters of 2025.
The 10-Q counts a subscriber as a service line, not a person: “The number of service lines is distinct from the number of unique devices, account holders, end users or physical persons”. It excludes managed enterprise and government customers.
What the Users Add Up To
At 13.6 million subscribers paying $69 a month, Starlink’s consumer service ran at about $11.3 billion a year at the end of September, a point-in-time approximation by our arithmetic. Reported consumer revenue was $3,121 million in the quarter, up 57% on a year earlier.
The rest of Connectivity is growing faster. Enterprise & government revenue, which the 10-Q says includes Starlink Mobile, reached $2,127 million, 1.9 times the $1,109 million of the first quarter of 2026 and 40.5% of Connectivity revenue, up from 35.9% a year earlier, by our arithmetic. The 10-Q credits “additional aircraft activations”. Connectivity operating income was $2,367 million, about twice the first quarter’s $1,188 million.
Net additions of Starlink consumer subscribers per quarter, the change in period-end subscribers reported in SpaceX’s S-1, second-quarter release and third-quarter 10-Q; our arithmetic.
What to Watch
ARPU: whether the third-quarter rise to $69 holds as lower-priced plans spread. Net additions: whether they stay in the 1.4 million to 1.7 million range of the past four quarters. Mix: enterprise and government’s share of Connectivity revenue in the next 10-Q.
The Structural Read
As we read the third-quarter numbers, ARPU’s $3 rise to $69, after two quarters at $66, came while Starlink still added about 1.6 million subscribers, by our arithmetic on the second-quarter release and the 10-Q.
As we read the segment mix, consumer subscriptions are no longer the whole story: enterprise & government revenue grew to 40.5% of Connectivity revenue, from 35.9% a year earlier, by our arithmetic, which the 10-Q ties mainly to aircraft activations.
SpaceX Form 10-Q, quarter to 30 September 2026, management’s discussion of Connectivity revenue
“driven by 88.9% growth in Starlink consumer subscribers and a 16.9% decline in Starlink consumer ARPU as we expanded internationally and added lower-priced service plans”
Three Implications
FOR REVENUE At 13.6 million subscribers and $69 a month, consumer service ran at about $11.3 billion a year at the end of September, by our arithmetic.
FOR GROWTH Net additions were 1.7 million, 1.4 million, 1.7 million and 1.6 million in the last four quarters, by our arithmetic on period-end counts.
FOR MIX Enterprise & government revenue reached $2,127 million, 40.5% of Connectivity revenue, by our arithmetic.
The framework describes Amazon’s flywheel as “an iterative loop that has run for two decades, enabling Amazon to improve its selection of goods and coststructure, thus further decreasing prices, which spins the flywheel even more”.
As we read it, Starlink’s filings show the price side of that loop in numbers: ARPU down 30% since 2023 while subscribers rose 5.9 times, by our arithmetic. The framework predates SpaceX’s filings and does not discuss Starlink.
What Is Not Established
SpaceX does not split ARPU by country or plan in the passages we read, so the effect of each lower-priced plan is not separable. The 2023 to 2025 ARPU figures are full-year averages, while the 2026 figures are quarterly. The annualised $11.3 billion is our approximation from period-end subscribers, not a reported figure. Subscriber counts measure service lines, not households.
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Starlink has 5.9 times the subscribers it had at the end of 2023, and each one pays 30% less, $69 a month against $99, by our arithmetic on SpaceX’s filings. It added about 1.6 million in the third quarter, and ARPU rose by $3 after two quarters at $66.
A note on sourcing. Every subscriber, ARPU and revenue figure comes from SpaceX’s own filings with the SEC: its S-1 of 20 May 2026, its second-quarter results release, and its 10-Q and results release for the quarter to 30 September 2026. Multiples, net additions, shares and the annualised service figure are our arithmetic. SpaceX was not contacted for this piece.
Gennaro Cuofano is a CRO and tech executive who has worked in AI since late 2015, starting with bringing NLP, natural-language generation, voice and chatbot products to the marketing industry. His background is in law and finance: he holds a Master's degree in Law and an International MBA with an emphasis on corporate finance (LUISS Business School and the University of San Diego, 2012), and worked as a financial analyst at a real-estate investment firm in San Diego and as an assistant controller. His work focuses on business model strategy, business engineering and, more broadly, structural analysis: how companies make money, read from their own filings. He created FourWeekMBA and leads research there and at The Business Engineer, his newsletter on AI and business strategy, with over 95,000 subscribers and more than 1,000 published analyses. His writing has also appeared on Entrepreneur (for example, How to Digitize a Family Business in Europe) and HackerNoon. Find him on LinkedIn and Substack. See how we source.
