ANET - Arista Networks, Inc.

Arista Networks sells Extensible Operating System (EOS)-based cloud networking switches and routers, purpose-built for high-speed data center and campus environments. The core customer base is large cloud titans (Meta, Microsoft, Google) and enterprises requiring high-throughput Ethernet switching, sold through a combination of direct sales and channel partners on a perpetual hardware plus software subscription model. Revenue is approximately $7B annually, heavily concentrated in North America with growing international exposure. Arista holds roughly 20-25% share of the 100GbE-and-above data center switching market by revenue, competing primarily against Cisco.

Past Year Trends

• Arista Networks grew full-year 2025 revenue 28.6% YoY to $9.01 billion, with Q1 2026 accelerating further to 35.1% YoY growth at $2.709 billion, driven by hyperscaler AI infrastructure buildout. (Bullish)
• GAAP gross margin compressed from 65.2% in Q2 2025 to 62.9% by Q4 2025, driven by a rising mix of lower-margin cloud titan sales and higher component costs as 800G port shipments scaled. (Bearish)
• 800G port adoption as a share of data center switch revenues more than doubled from roughly 15% in 2025 to 35% in Q1 2026, reflecting accelerating migration to high-speed AI back-end fabric deployments. (Bullish)

Next Year Trends

• Arista raised its 2026 AI networking revenue target to $3.25–$3.5 billion, an approximately 83% increase over the $1.5–$1.9 billion achieved in 2025, contingent on continued backend Ethernet fabric wins at Microsoft and Meta, which together represent roughly 35% of total revenue. (Bullish)
• Microsoft concentration rose to approximately 20% of total 2024 revenue and remains the single largest customer risk; any pause or reallocation in Microsoft's Azure AI capex would disproportionately impact Arista's top line given this dependency. (Bearish)
• Full-year 2026 gross margin guidance of 62%–64% signals sustained structural compression versus the 64%–65% range of 2025, as higher-volume cloud titan contracts carry lower margins and limit near-term operating leverage expansion. (Bearish)

Red Flags

No severe red flags identified as of August 2025.