Yvonne Wassenaar Sells 971 Arista Networks Shares via 10b5-1 Plan

This SEC Form 4 filing reports that Yvonne Wassenaar, a director of Arista Networks, executed multiple stock transactions on May 20, 2026. The transactions involved the vesting and sale of 971 restricted stock units (RSUs) that were granted on May 30, 2025. Upon vesting, Wassenaar received 971 shares of common stock at $0 cost, then immediately sold all 971 shares through a pre-arranged 10b5-1 trading plan established on November 21, 2025. The sales occurred in four separate transactions at weighted average prices ranging from $139.892 to $142.6189 per share, with the actual sales prices falling within specific ranges from $139.36 to $143.20. Following these transactions, Wassenaar's direct ownership in Arista Networks decreased from 10,755 shares to 9,784 shares. The filing demonstrates compliance with insider trading regulations through the use of a Rule 10b5-1 trading plan.