Arista Networks: Director Templeton Mark B sold 5,000 shares

What happened

• Templeton Mark B, director, sold 5,000 shares of Arista Networks common stock in open-market transactions on Oct 1, 2026. The filing lists five dispositions: 700 shares @ $201.62 for $141,137; 500 shares @ $202.90 for $101,449; 1,800 shares @ $204.44 for $368,001; 1,800 shares @ $205.58 for $370,036; and 200 shares @ $206.03 for $41,206, totaling $1,021,829.

Key details

• Transaction date: Oct 1, 2026; reported on Form 4 filed Oct 5, 2026.
• Prices and amounts (as reported): 700 @ $201.62 ($141,137) (F2); 500 @ $202.90 ($101,449) (F3); 1,800 @ $204.44 ($368,001) (F4); 1,800 @ $205.58 ($370,036) (F5); 200 @ $206.03 ($41,206) (F6).
• Price ranges: F2–F6 state the per-block prices are weighted averages from multiple trades, with ranges of $201.18–$202.10 (F2), $202.64–$203.09 (F3), $203.99–$204.97 (F4), $205.00–$205.97 (F5), and $206.02–$206.04 (F6).
• Plan and holdings: F1 reports the sales were effected pursuant to a Rule 10b5-1 trading plan entered Jun 9, 2026. F7 notes some shares are held in a trust for which the reporting person's spouse serves as trustee.
• Shares owned after the transaction: not reported in the filing.
• Filing timeliness: Form 4 filed on Oct 5, 2026; the filing does not indicate it was late.

Why it may matter

• These were open-market sales executed under a Rule 10b5-1 plan; the filing does not indicate an option exercise, award, or gift.
• This filing does not show why the insider traded or why the company acted.