SpaceX S-1 Filing Reveals Starlink Growth Slowdown, Starship Reusability Doubts

SpaceX’s S-1 filing disclosed Starlink revenue of $11.4 billion in 2025, but user growth decelerated in the first quarter of 2026 and average revenue per user fell to $66. The document also acknowledged for the first time that full Starship reusability may not be necessary to deploy next-generation satellites, casting doubt on the cost reductions critical to the rocket’s business case. A May 2026 test flight of the third Starship version failed to relight engines for a controlled return, a key reusability capability. Satellite analyst Tim Farrar estimated that without full reusability, launch costs could remain around $100 million per mission—comparable to Falcon 9—eroding the economics of lofting new, higher-throughput Starlink satellites 60 at a time. Starlink surpassed 10 million subscribers but quarterly growth rates declined. Expansion into lower-price international markets drove ARPU down from $99 in 2023. SpaceX must replace approximately 20% of its constellation annually to maintain service, a capital-intensive treadmill that has consumed $11.4 billion since early 2023. Competition from Amazon’s Leo network and slowing demand suggest the satellite broadband market may be smaller than anticipated, according to Farrar.