Arista Networks combines 37.7% Q2 growth, 49.9% operating margins, and AI Ethernet leadership, but its 56.5x forward P/E demands sustained execution.
Overview
Arista Networks (ANET) is a software-defined networking leader supplying high-performance Ethernet systems to AI infrastructures, hyperscale clouds, enterprises, and routing environments. Its single-image EOS operating system, merchant-silicon architecture, low TCO, and operational reliability have enabled it to take the number-one position in high-speed data-center switching from Cisco. Revenue is concentrated but growing: Cloud and AI Titans represented 48% of fiscal 2025 revenue, enterprises 32%, and AI and specialty providers 20%; Microsoft and Meta accounted for approximately 26% and 16%, respectively. **Q2 2026 revenue rose 37.7% to $3.036 billion, beating consensus by 7.3%, while non-GAAP EPS of $1.02 exceeded estimates by 15.9%.** Management guided Q3 revenue to approximately $3.30 billion and non-GAAP EPS of $1.06–$1.08, well above consensus. The stock closed at $193.95 on August 4, 2026, at approximately 58.4x trailing P/E, 56.5x forward P/E, and 22x sales, so expectations are elevated. The investment case rests on Ethernet adoption in AI back-end networks, a $6.20 billion deferred-revenue reservoir, and enterprise-campus expansion. The principal counterweights are customer concentration, silicon and Taiwan foundry dependence, and valuation risk.