Arista Networks Inc Earnings - Q3 2026 Analysis & Highlights
Arista reported record Q3 growth, raised its 2026 outlook, and issued an initial 2027 revenue outlook of approximately $18.5 billion, citing strength in AI networking and enterprise demand alongside continued investment and supply-chain execution.
Key financial results
Q3 revenue was $3.66 billion, up 58.5% year over year and above the company’s $3.3 billion guidance.
Gross margin was 64%, down from 65.2% a year earlier but up from 63.4% in Q2; management cited product cost inflation and end-customer mix, with supply-chain efficiency partly offsetting inflation.
Operating expenses were $545.3 million, including $408.5 million in R&D; operating income was $1.8 billion, or 49.1% of revenue.
Net income was $1.53 billion, or 41.9% of revenue; diluted EPS was $1.20, up 55.8% from $0.77 a year earlier.
Cash from operations was approximately $1.2 billion; cash, cash equivalents and marketable securities ended the quarter at approximately $14.4 billion.
Inventory increased to $3.2 billion from $2.5 billion in Q2, while purchase commitments rose to $11.4 billion from $9.7 billion.
Deferred revenue was approximately $6.8 billion, down from $6.9 billion in Q2; management said the balance can fluctuate as new products and use cases enter or leave deferred revenue.
Business segment results
Management identified strength in both AI and enterprise customers as drivers of Q3 growth; it did not provide Q3 revenue or profit figures for individual business segments.
For 2026, management’s target figures were $3.5 billion for AI and $1.25 billion for campus.
The company expects 2027 AI fabric revenue to double to approximately $7 billion, while Cognitive Campus is projected to grow 60% to approximately $2 billion.
International revenue was $682.5 million, or 18.6% of total revenue, compared with 23% in Q2; management attributed the sequential mix change to sales timing and geographic mix at large global customers.
Year-over-year revenue grew by double digits in all three geographic segments.
Management described momentum across enterprise, providers, data center, campus and AI, without disclosing separate revenue or segment-profit results for those areas.
Capital allocation
Arista ended Q3 with approximately $14.4 billion in cash, cash equivalents and marketable securities.
Of the $1.5 billion stock-repurchase program approved in May 2025, $817.9 million remained available; the timing and amount of future repurchases will depend on market and business conditions, stock price and other factors.
Q3 capital expenditures were $100.7 million; construction of expanded Santa Clara facilities remained on track for completion in the coming months.
The CEO described Arista’s financial position as having zero debt; the call did not provide a dividend plan or debt-repayment outlook.
Industry trends and dynamics
Management characterized AI networking as moving from a compute-centric model toward a more network-centric architecture, with customers increasingly combining back-end and front-end data-center requirements.
Arista said it had surpassed 100 Etherlink customers and forecast more than 10 gigawatts of deployment across 10 or more types of compute accelerators by the end of 2027.
The company described demand across three AI-fabric use cases: scale-up, scale-out and scale-across; scale-across was roughly 30% of this year’s mix and management expected its share to rise in 2027.
Management said scale-up would remain in early trials in 2027, with production expected in 2028; trials are expected to begin in 2027.
Arista cited industry-wide supply constraints and shortages, and said component funding and availability could cause inventory balances and operating cash flow to fluctuate.
Management described an addressable market of more than $200 billion by 2030, which it views as a multiyear growth opportunity.
Competitive landscape
Arista emphasized its differentiated EOS operating system, citing reliability, automation, process isolation and upgrades without network disruption as advantages.
The CTO said Arista had maintained fewer than 100 CVEs over the prior two decades, while the CEO characterized its vulnerability count as often 10 to 50 times better than alternatives.
Management said customers welcomed Arista’s standards-based Ethernet approach and lower total cost of ownership for networking across cloud, campus, data centers, WAN and AI centers.
The CEO described InfiniBand as a proprietary network approach that Arista initially encountered in AI deployments, and said Ethernet scale-up designs are being developed as an open alternative.
Arista said it is developing open co-packaged optics and expects these to reach the market in the 2028–2030 timeframe, while expecting pluggable optics to remain widely deployed.
The company cited Forrester recognition for innovation and its data-center portfolio, as well as Gartner leadership recognition in campus wired and wireless and data-center segments.
Macroeconomic environment
The call cited product cost inflation and industry-wide component shortages as operating pressures, with supply-chain efficiency partly offsetting product inflation.
Management said advanced hyperscaler data-center products generally have longer lead times than enterprise products, reflecting their more cutting-edge components and technology requirements.
The call did not provide a specific outlook for tariffs, recession or broader economic conditions.
Growth opportunities and strategies
Arista’s Arista 2.0 strategy extends its EOS platform from data centers to campus, branch, WAN, cloud and AI environments, with network data and automation positioned as central to the approach.
The company is developing AI networking across scale-up, scale-out and scale-across, including rack-scale designs with accelerator partners such as Arm, Microsoft Maia, AMD, Qualcomm and Meta.
Management said experience working with accelerators, including Cerebras and Microsoft Maia, has helped Arista tune buffers and software performance and improve I/O throughput.
Arista is developing AVA, its autonomous virtual assistant, to monitor and troubleshoot network and security infrastructure; AVA had been turned on as an alpha feature for customer trials in CloudVision, and the company was working on pricing models.
The CTO said Arista was working with Anthropic, Google, OpenAI and others to integrate AI-enabled security capabilities into its software security pipeline.
Arista highlighted zero-trust networking services, including macro-segmentation, network detection and response, and link and tunnel encryption.
Management said campus refresh cycles are long and expected enterprise adoption to be a multiyear cycle.
Financial Guidance and Outlook
For Q4 2026, Arista forecast revenue of $3.9 billion to $4.0 billion, gross margin of 63%–64%, operating margin of 48%–49%, and diluted EPS of $1.26–$1.30; the expected effective tax rate was approximately 21%.
The company raised its 2026 revenue outlook to approximately $13.3 billion, representing 48% annual growth.
For 2027, management forecast revenue growth of 38%–40%, or approximately $18.5 billion at the midpoint, gross margin of 62%–64%, operating margin of approximately 49%, and an effective tax rate of approximately 21%.
Management said the 2027 outlook assumes double-digit growth across all sectors, with some growing faster than others; it specifically cited AI, enterprise, specialty cloud providers and front-end networks.
The company said it had approximately two quarters of visibility and expressed confidence in supply-chain execution, citing supplier agreements and long-term strategic arrangements for silicon, PCB capacity and memory; it also noted that not every 2027 order had been placed.
Arista did not guide deferred revenue, but management said it expected the deferred-revenue balance at the end of 2026 to be higher than at the end of 2025.
