Arista Networks Just Delivered Its First $3 Billion Quarter. Here's What It Means for the AI Networking Trade.

Arista Networks (ANET) reported Q2 revenue of $3.036 billion, up 37.7% year-over-year and marking the company's first quarter above $3 billion. Management raised full-year guidance to $12.6 billion, representing 40% annual growth.

The strong topline comes with red flags. Gross margin is declining, though specific figures were not disclosed in the analyst report. Customer concentration remains acute: Microsoft and Meta together account for 42% of revenue, creating meaningful single-point risk for a company trading at a forward P/E near 48.

That valuation multiple embeds multiple years of perfect execution not yet delivered. The stock has priced in the AI networking buildout thesis, leaving limited room for upside surprises and significant downside if either hyperscale customer throttles spending or if margin pressure accelerates.

The guidance raise signals continued near-term demand from cloud infrastructure buildouts, but the combination of high concentration, valuation, and margin headwinds suggests the easy money has been made.