Arista Networks CFO Sells $263K in Common Stock Under 10b5-1 Plan

Arista Networks, Inc. ($ANET) Form 4 Transaction Analysis

Executive Summary

On October 8, 2026, Arista Networks, Inc. CFO Chantelle Yvette Breithaupt filed a Form 4 disclosing the sale of 1,224 shares of Common Stock on October 6, 2026, at an execution price of $215.00 per share, generating gross proceeds of $263,160.00.

Key Transaction Details

• Filing Date: October 8, 2026
• Transaction Date: October 6, 2026
• Transaction Code: S (Open-market sale)
• Shares Sold: 1,224 shares
• Execution Price: $215.00
• Total Transaction Value: $263,160.00
• Post-Transaction Direct Beneficial Ownership: 68,697 shares

Context & Significance

• Trading Plan: The disposition was executed pursuant to a pre-arranged Rule 10b5-1 trading plan established on December 11, 2025, and modified on June 2, 2026. Pre-scheduled 10b5-1 plans provide affirmative defense against insider trading allegations and mitigate concerns over discretionary timing.
• Position Impact: The transaction represents approximately 1.75% of Breithaupt's pre-transaction direct holdings (down from 69,921 shares to 68,697 shares).
• Market Impact: Given the modest transaction volume ($263K) and programmatic execution under a 10b5-1 plan, this transaction is assessed as having Low market significance.