Arista Networks stock: AI demand lifts Q4 revenue outlook

Arista Networks stock traded at 187.99 euros on Lang & Schwarz at 15:41 CET on Friday, November 13, 2026. That was 6.55 percent above the 176.44-euro quote cited in our November 12 report, a separate move from any single-session market comparison.

Arista's third-quarter results, announced on November 3, showed revenue of 3.66 billion US dollars for the period ended September 30. According to Arista Networks, revenue increased 58.5 percent from the year-earlier quarter and exceeded the company's prior guidance of 3.3 billion US dollars.

AI demand broadens the offering

Arista said it launched open standards-based Ethernet rack-scale architectures for scale-up and scale-out AI networks with partners including AMD, Arm, Broadcom, Meta, Microsoft and Qualcomm. The company also outlined a distributed AI-fabrics strategy spanning data centers and high-radix networking.

Chief Executive Jayshree Ullal said the momentum across customer groups reinforced Arista's role in the generative and agentic AI era. The release also said the company was added to the S&P 100 in September 2026.

Higher targets raise execution demands

For the fourth quarter, Arista expects revenue of 3.9 billion to 4.0 billion US dollars, a non-GAAP operating margin of 48 percent to 49 percent and non-GAAP diluted earnings per share of 1.26 to 1.30 US dollars. The adjusted measures exclude items including stock-based compensation and intangible-asset amortization, so GAAP results can differ.

The outlook keeps AI infrastructure demand at the center of the investment case while leaving supply constraints, limited component sources, inventory management and reliance on merchant silicon suppliers as operating risks.

US technology shares remain the broader market backdrop, with the S&P 500 providing the relevant market context.

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