Why Arista Networks Stock Rocketed 30% Higher in the First Half of 2026 and Why There's Likely More to Come

Arista Networks (ANET) surged 29.6% in the first half of 2026, nearly tripling the S&P 500's 10% return over the same period. The networking equipment maker's rally came on the back of record revenues and accelerating growth tied to AI infrastructure adoption.

Management lifted full-year revenue guidance twice in consecutive quarters, now projecting 28% growth to $11.5 billion for 2026. The back-to-back raises signal stronger-than-expected demand as hyperscalers and enterprises scale out AI data center buildouts.

The Street remains overwhelmingly bullish, with 97% of analysts maintaining buy ratings on the stock. Management has flagged expectations to onboard major new customers, suggesting the revenue pipeline extends beyond existing hyperscale relationships.