Ullal sells Arista stock at about $211 to $213; CFO sells at $215

Form 4 filings show CEO Jayshree Ullal selling Arista stock on October 6 at weighted-average prices of about $211 to $213 per share. CFO Chantelle Breithaupt separately sold 1,224 shares at $215.00 on the same day under a Rule 10b5-1 plan. Both sales were reported on Form 4 filings made on October 8.

• Ullal: October 6 sales at about $211.36 to $213.06 per share
• Breithaupt: 1,224 shares sold at $215.00 on October 6
• Breithaupt's plan was entered on December 11, 2025 and modified on June 2, 2026