Arista Networks stock weighs record Q3 and stronger AI outlook

Arista Networks reported a record third quarter on Tuesday, November 3, 2026, as strong demand for artificial intelligence infrastructure and enterprise networking lifted revenue and profitability. The company said the quarter produced its highest year-over-year revenue growth since its initial public offering.

Revenue reached 3.66 billion US dollars for the quarter ended September 30, up 58.5 percent from the year-earlier period and 20.5 percent from the second quarter. The result exceeded the company's prior revenue guidance of 3.3 billion US dollars. GAAP diluted earnings per share rose to 1.22 US dollars from 0.67 US dollars, while non-GAAP diluted earnings per share came in at 1.20 US dollars compared with 0.77 US dollars a year earlier.

Arista reported a GAAP operating margin of 44.9 percent and a non-GAAP operating margin of 49.1 percent. The comparable non-GAAP margin in the third quarter of 2025 was 48.6 percent. The company said the quarter set new records for revenue growth, net income and earnings per share.

AI Networking Expands Product Reach

Chief Executive Jayshree Ullal said the performance reflected broad momentum across customer groups and highlighted Arista's relevance to the generative and agentic AI market. The company also announced open Ethernet rack-scale architectures for scale-up and scale-out AI fabrics with AMD, Arm, Broadcom, d-Matrix, Meta, Microsoft and Qualcomm.

The new liquid-cooled portfolio includes an architecture supporting up to 144 accelerators in a single rack and scaling to 1,024 XPUs through cross-rack topologies. Arista also outlined its scale-across strategy, built around the 7800 AI Spine and its EOS operating system, for distributed AI fabrics connecting data centers.

For investors, the product announcements reinforce the importance of AI networking to Arista's growth profile. The quarter's revenue acceleration came alongside higher operating profitability, although the company remains exposed to customer concentration, component availability, supply commitments and the pace of data-center investment.

Fourth-Quarter Targets Stay Elevated

Arista expects fourth-quarter revenue of 3.9 billion to 4.0 billion US dollars. It forecasts 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 guidance excludes stock-based compensation, intangible amortization and related tax effects, so the adjusted outlook is not directly interchangeable with GAAP earnings.

Arista Networks stock traded at 154.09 euros on Lang & Schwarz at 13:04 CET on Monday, November 9, 2026. Investors can follow the real-time quote of Arista Networks stock as the market assesses whether AI infrastructure demand can support the elevated outlook.

Broader sentiment in the S&P 500 remains relevant for large US technology companies as investors weigh AI spending against valuation and execution risks.

Arista's next major focus is the delivery of its fourth-quarter targets and further evidence that AI, data center and enterprise demand can sustain the current growth rate. More news and analyses on Arista Networks stock.

Source: Arista Networks.