Arista Networks CEO and Chairperson Jayshree Ullal sold 8,948 shares on 2026-09-25 at $211.40 per share, for a total of about $1.89 million. The sale was reported as being made under a pre-scheduled Rule 10b5-1 trading plan, which is a preset program that allows insiders to trade on a schedule established in advance, helping reduce concerns that the trade was timed around nonpublic information. This trade matters because Ullal is both the top executive and the board chair, roles that typically come with broad visibility into company operations and strategy. Even so, planned 10b5-1 sales are often used for routine reasons such as diversification, tax planning, or managing concentrated equity exposure, and they carry less informational weight than an unscheduled, discretionary sale. Recent insider activity at ANET over the last 30 days shows two reported sales and no reported insider buys: Ullal’s $1.89 million sale and a smaller sale by Kenneth Duda of roughly $298,520 on 2026-09-21. A cluster of sales without buys can draw attention, but the limited number of transactions and the presence of a 10b5-1 plan suggest these filings are more consistent with routine selling than a clear signal about business conditions.