Arista Networks Director Mark B. Templeton Sells $1.02M in Common Stock Under Rule 10b5-1 Plan

Overview

On October 5, 2026, Arista Networks, Inc. ($ANET) filed a Form 4 detailing open-market sales by Director Mark B. Templeton. On October 1, 2026, Mr. Templeton sold an aggregate of 5,000 shares of common stock, generating $1,021,829.45 in proceeds.

Transaction Breakdown

The transactions were executed across five weighted-average price tiers:

• 700 shares at $201.6243 ($201.18 – $202.10)
• 500 shares at $202.8980 ($202.64 – $203.09)
• 1,800 shares at $204.4450 ($203.99 – $204.97)
• 1,800 shares at $205.5758 ($205.00 – $205.97)
• 200 shares at $206.0300 ($206.02 – $206.04)

Holdings & Context

• Rule 10b5-1 Plan: The sales were executed under a Rule 10b5-1 trading plan adopted on June 9, 2026, indicating programmatic execution rather than discretionary, market-timed selling.
• Remaining Ownership: Following the disposition, Mr. Templeton directly owns 48,410 shares of common stock and indirectly controls 75,200 shares held in a trust for which his spouse serves as trustee, for a combined total of 123,610 shares.
• Significance: Trading significance is rated Low because the sale represents approximately 3.9% of his total combined holdings and was executed in accordance with a pre-established 10b5-1 trading arrangement.