Arista Networks Director Mark B. Templeton Sells $829K in Common Stock Under Rule 10b5-1 Plan

Executive Summary

On November 4, 2026, Arista Networks, Inc. (NYSE: ANET) reported that Director Mark B. Templeton executed open-market sales totaling 5,000 shares of common stock on November 2, 2026. The transactions generated aggregate proceeds of approximately $829,255 at a weighted average price of $165.85 per share.

Transaction Breakdown

The transactions were executed in multiple tranches across various price points:

• 1,400 shares sold at a weighted average price of $164.07 ($163.53 – $164.48 range)
• 1,200 shares sold at a weighted average price of $165.00 ($164.68 – $165.50 range)
• 900 shares sold at a weighted average price of $166.36 ($166.00 – $166.70 range)
• 1,000 shares sold at a weighted average price of $167.41 ($167.08 – $167.96 range)
• 500 shares sold at a weighted average price of $168.85 ($168.39 – $169.33 range)

Post-Transaction Holdings

Following these dispositions:

• Direct Ownership: 43,410 shares
• Indirect Ownership: 75,200 shares held in a trust for which the reporting person's spouse serves as trustee
• Total Beneficial Ownership: 118,610 shares

Trading Significance

The sales represent approximately 4.0% of Templeton's total pre-transaction beneficial holdings (123,610 shares). As disclosed in Footnote 1, the trades were executed pursuant to a pre-established Rule 10b5-1 trading plan adopted on June 9, 2026. Given the scheduled nature of the plan and the modest size relative to total holdings, this activity carries low signaling significance for the broader market.