Arista Networks (ANET) Q3 2026: 3 Takeaways for Long-Term Investors

On November 3, 2026, Arista Networks (ANET) reported third-quarter revenue of $3.66 billion, up 58.5% year over year. The company also provided an outlook for fiscal year 2027, projecting revenue of approximately $18.5 billion, which represents 38% to 40% growth. Management highlighted three key themes on the earnings call: the shift to open Ethernet standards for AI infrastructure, accelerating growth in the enterprise campus segment, and the security advantages of its unified software architecture.

First, Arista is expanding its Etherlink switching suite to meet demand from cloud providers moving away from proprietary interconnects. CEO Jayshree Ullal noted that the company has already surpassed 100 Etherlink customers and forecasts deployments exceeding 10 gigawatts of power capacity across 10 or more types of compute accelerators by the end of 2027. This positions Arista at the center of the AI infrastructure buildout.

Second, the enterprise campus business is growing faster than the overall market. Management expects cognitive campus revenue to reach $2 billion in 2027, up 60%, as corporate customers replace legacy network vendors to gain reliability and security segmentation. Meanwhile, AI fabrics are expected to double to approximately $7 billion in the same period.

Third, Arista's single Extensible Operating System (EOS) architecture isolates software processes, reducing network disruptions during patches. CTO Kenneth Duda emphasized that Arista has maintained fewer than 100 common vulnerabilities and exposures (CVEs) over the last two decades, far below competitors with multiple operating systems. This security advantage is a key differentiator.

Looking ahead, Arista's strong balance sheet and long-term supplier commitments support its growth plans, though management is monitoring component lead times. The company's future competitive advantage hinges on migrating proprietary interconnects to open Ethernet standards across diverse accelerators, a trend that CEO Ullal believes is inevitable.

Arista's impressive revenue growth and guidance underscore its ability to capture share in the rapidly expanding AI networking market. The shift to open Ethernet standards is a tailwind for Arista, as cloud providers and enterprises seek flexibility and avoid vendor lock-in. By championing open standards, Arista is well-positioned to displace proprietary solutions like InfiniBand and NVLink, which could unlock a large addressable market.

The enterprise campus segment provides diversification beyond hyperscale data centers. With 60% growth expected, this business adds a stable revenue stream and reduces dependence on a few large cloud customers. It also demonstrates Arista's ability to compete in the broader networking market, where legacy vendors are losing ground.

Arista's unified software architecture is a competitive moat. Fewer security vulnerabilities mean lower risk for customers and potentially lower operational costs. In an era of increasing cyber threats, this reliability is a selling point that can command pricing power and customer loyalty.

The FY2027 revenue target of $18.5 billion implies sustained high growth, but it also sets a high bar. Investors should watch for execution risks, such as supply chain constraints and competitive pressures. However, Arista's strong balance sheet and supplier commitments provide some cushion. Overall, the earnings call reinforced Arista's leadership in AI networking and its potential for long-term growth.