Arista (ANET) CTO Kenneth Duda Exercises Options & Sells Shares

What Happened

• Kenneth Duda, President and CTO (and a director) of Arista Networks (ANET), exercised/converted stock awards and options on August 20, 2026 and sold a large block of shares the same day. He acquired shares via exercises (including 13,334 @ $15.28 and 3,999 @ $14.15 for ~$260,273 total cost) and multiple 0‑cost conversions (restricted stock units/options). He then sold multiple tranches in the open market (totaling 43,333 shares in various transactions priced ~ $183.72–$187.16) and had 15,541 shares withheld to satisfy tax liabilities. Combined dispositions on Aug 20 generated roughly $10.9 million in gross proceeds.

Key Details

• Transaction date: August 20, 2026 (Form 4 filed Aug 24, 2026 — timely within the 2‑business‑day requirement).
• Major items: Option exercises/conversions (code M); open market sales (code S); share withholding for taxes (code F).
• Sales shown (selected): multiple block sales such as 6,568 @ $186.13 ($1,222,474), 6,063 @ $186.13 ($1,128,480), and others; total open‑market sale proceeds ≈ $8.03M; tax/withholding disposition (15,541 @ $186.45) ≈ $2.90M; combined ≈ $10.93M.
• Shares involved: roughly 43,333 sold on the open market + 15,541 withheld = ~58,874 shares disposed. Acquired via paid exercises (17,333 shares at ~$15–$16 strike totaling ~$260k) plus multiple zero‑cost conversions (RSUs/options).
• Shares owned after transaction: not specified in the provided excerpt of the filing.
• Notable footnotes: sales/exercises were effected pursuant to a Rule 10b5‑1 trading plan entered Mar 11, 2026 (Footnote F1); some shares were withheld to satisfy tax withholding on vesting (F12); other footnotes reference family trusts, foundation and vesting schedules (F6, F8, F11–F21).
• Filing timeliness: Form 4 was filed Aug 24 for Aug 20 transactions; this appears timely (filed within two business days).

Context

• This appears to be a routine exercise and sell pattern: options/RSUs converted (some paid, some converted/vested at $0 cost) and many shares sold under a pre‑arranged Rule 10b5‑1 plan, with shares withheld to cover taxes (a common “sell‑to‑cover” practice). Such transactions are generally considered routine insider liquidity rather than an explicit bullish or bearish signal; retail investors should note the 10b5‑1 plan and tax withholding when interpreting the activity.