Key Highlights

  • Arista Networks (NYSE:ANET) reported third-quarter Revenue of about USD 3.66 billion, up 58.5% from a year earlier and 20.5% from the prior quarter, against the company's own guidance of about USD 3.3 billion.
  • Non-GAAP diluted EPS was USD 1.20, up from USD 0.77 a year earlier and above a USD 1.08 published estimate.
  • Fourth-quarter revenue is guided to USD 3.9 billion to USD 4.0 billion against about USD 3.6 billion expected, with non-GAAP EPS of USD 1.26 to USD 1.30.
  • Shares rose more than 6% after hours on November 3, 2026, in one published account.

A Large Beat Against Guidance

Arista Networks (NYSE:ANET) announced third-quarter results on Tuesday, November 3, 2026, for the quarter ended September 30. Revenue of about USD 3.66 billion was the company's fastest year-over-year growth since its initial public offering, in the words of CEO Jayshree Ullal, who called it another momentous quarter with record profitability. The result beat the company's guidance of about USD 3.3 billion and a published consensus of USD 3.33 billion. GAAP diluted EPS was USD 1.22, and non-GAAP diluted EPS was USD 1.20. Non-GAAP Operating Margin reached 49.1%, up from 48.6% a year earlier.

Margins and the Outlook

Gross margin edged lower, which is the main caveat. GAAP gross margin was 63.6%, down from 64.6% a year earlier, and non-GAAP gross margin was 64.0%, down from 65.2%. Fast growth in large cloud and AI customers can bring lower margins because of pricing and mix, since big buyers negotiate discounts. Even so, operating margin rose as revenue scaled. Arista Networks (NYSE:ANET) guided the fourth quarter to USD 3.9 billion to USD 4.0 billion in revenue and a non-GAAP operating margin of 48% to 49%. Analysts had expected about USD 3.6 billion, so the guide sits well above published estimates.

Risks Behind the Strength

Arista sells networking gear to data centers where AI clusters need high-speed connections, so its results depend on spending by a small number of large customers. If AI Capital budgets are cut, orders can slow quickly, and the sector has already lost about USD 5 trillion in value since October 6. Arista Networks (NYSE:ANET) must also manage component costs, including memory, and competition from larger rivals. One summary of the call cited a 2027 revenue target near USD 18.5 billion, but that figure was not confirmed from the company release and is not relied on here. Investors should watch gross margin and customer concentration. Order backlogs, deferred revenue and the pace of new customer wins will show how much of the growth is repeatable. A single quarter of fast growth does not establish a trend, and the share price can move sharply on small changes in guidance. The company also faces the risk that large customers build more of their own networking, which could cap long-term growth.

Where Things Stand

Arista can sustain growth if AI network spending continues, and the latest quarter gives strong evidence of demand: revenue up 58.5%, EPS well above last year and a guide above expectations. Arista Networks (NYSE:ANET) still faces margin pressure and customer concentration, and the sector selloff shows that sentiment can reverse. The balance of evidence is positive on operations and cautious on valuation. The next checks are fourth-quarter revenue near USD 3.9 billion to USD 4.0 billion, stable gross margin and continued orders from the largest cloud customers.