What the Concentration Actually BuysWide moat
Arista Networks (ANET) — moat facet
Co-developing with the operators of the world's largest networks is why EOS is what it is — and the price is the pricing.
The risks of Arista's concentration have their own root threat. The case for it deserves stating, because it is not merely that the titans spend a lot.
Selling to hyperscalers means co-developing with engineering organisations that operate the largest networks in existence, at a scale where every inefficiency is visible and quantified. Features get specified by customers who will run them across hundreds of thousands of ports and report precisely how they fail. That feedback loop is why EOS is what it is, and it is not available to a vendor selling to a thousand mid-sized enterprises — no matter how many of them there are.
It also produces revenue quality that a diversified base would not. These customers pay on time, buy in enormous quantities, and plan years ahead, which is why Arista can run a fabless model with net cash and no debt. The price is the pricing: gross margin eased from 65.6% to 63.4% as the largest customers took bigger discounts, and Arista's own filing notes that large customers may receive lower pricing through volume discounts1.
Watch gross margin as titan revenue grows. Margin holding while the two largest customers expand would mean the technical advantage is real enough to resist their buying power. Margin falling means Arista is buying the relationship.
The benefits of selling to the titans are unchanged and substantial: co-development with the operators of the largest networks in existence, enormous order sizes, and revenue quality that funds a net-cash balance sheet. The cost showed up this year in non-GAAP gross margin easing from 65.6% to 63.4% as those customers took bigger discounts. A fair trade, holding steady.
The price of selling to the titans; watch whether it stabilises as enterprise revenue grows.
Source: Arista Networks Q2 2026 results release (Exhibit 99.1, 4 August 2026) ↗- ReportedArista's filing notes that large customers may receive lower pricing terms due to volume discounts.Arista Networks Form 10-K, FY2025 — two customers accounted for more than 10% of total revenue in each of the last three years; sales to one end customer represented 16%, 15% and 21% of total revenue and sales to the other end customer represented 26%, 20% and 18% of total revenue for the years ended December 31, 2025, 2024 and 2023 respectively; the company notes unpredictability in the timing and volume of large customer orders, that large customers may receive lower pricing terms due to volume discounts or may elect to re-assign allocations to multiple vendors based upon specific requirements, and that it continues to diversify its enterprise customers across media and entertainment, healthcare, oil and gas, education, manufacturing and industrial sectors — FY2025 (ended December 31, 2025) · publ. February 17, 2026 · source ↗