Arista Networks CEO and Chairperson Jayshree Ullal sold 4,000 shares on Oct. 8, 2026 at $217.05 per share, for total proceeds of about $868,190. The trade was disclosed as being made under a pre-scheduled Rule 10b5-1 trading plan, which means the sale was set up in advance and can help reduce the appearance that it was timed around new information. This transaction matters because it comes from the company’s top executive and board leader, a role with broad visibility into strategy, operations, and financial performance. Insider selling can sometimes raise questions for investors, but sales can also be driven by personal financial planning, taxes, or diversification—especially when executed through an automatic plan like a 10b5-1. Over the past 30 days, this appears to be the only reported insider trade at ANET. With no cluster of insider selling or buying in the period provided, the available context points to a single, planned sale rather than a broader shift in insider behavior.