Major ClientsWide moat

Ask who Apple's major clients are and the honest answer is that it does not really have any. No customer accounts for 10% or more of net sales; the closest thing to concentration in the filings is a single counterparty at 12% of trade receivables¹, which measures who owes Apple money at a moment in time rather than who buys from it. Revenue instead arrives from an installed base of more than 2.5 billion active devices² — hundreds of millions of individuals, none of whom can negotiate.

That is worth pausing on, because much of this app is about the opposite condition. Arista takes roughly 42% of its revenue from two customers, CoreWeave took about two-thirds from one, and each of those pages treats concentration as the central risk. Apple has the inverse problem, which is barely a problem at all: its buyers are atomised, its pricing is posted rather than negotiated, and no single lost account would register in a quarter.

Where Apple does have large counterparties is one step removed — in the channel that reaches those individuals. Roughly 60% of net sales still flow through third-party carriers and resellers, against 40% through Apple's own stores and site, and the 10-K carries a named risk factor about depending on their performance. Two other groups pay Apple large sums without being customers in the ordinary sense: Google, whose roughly $20 billion a year for search placement makes it Apple's largest single payer (covered under Competitors), and the developer base, which has earned about $550 billion through the App Store since 2008 while paying Apple a commission on part of it³.

The interesting movement is in that 60/40 split, and it runs in Apple's favour: the direct share was 28% as recently as 2017⁴. The pages that follow take the four groups in turn — the customers too numerous to name, the carriers who still sell most iPhones, the retail business steadily taking that job back, and the enterprise buyer Apple has spent a decade learning to serve.