Arista Networks (ANET) President/CTO Kenneth Duda Sells Shares

What Happened
Kenneth Duda, President, Chief Technology Officer and a director of Arista Networks, executed option exercises and multiple open‑market sales on September 21, 2026. He exercised 17,333 option shares at $14.15 each (cost $245,198). Separately, he sold a total of 43,333 shares in multiple open‑market transactions for aggregate proceeds of approximately $8.82 million. The filing also shows a 17,333‑share derivative disposition (recorded at $0), consistent with shares surrendered/withheld in connection with the option exercise.

Key Details

• Transaction date: September 21, 2026; Form 4 filed September 23, 2026 (appears timely under Section 16 rules).
• Option exercise: 17,333 shares acquired at $14.15 each (total cost $245,198). (Code M = exercise/conversion of derivative.)
• Open‑market sales: 43,333 shares sold in multiple trades at prices ranging roughly from $201.09 to $205.95; total proceeds ≈ $8,818,194. (Code S = sale.)
• Additional derivative line: 17,333 shares disposed at $0 (likely shares surrendered/withheld related to the exercise).
• Notable footnotes: sales and/or exercises were effected pursuant to Rule 10b5‑1 trading plans entered March 11, 2026 (for the reporting person and for related trusts/foundation). Several holdings are in family trusts, a 501(c) foundation, or annuity trusts for which the reporting person or spouse serve as trustee/co‑trustee (see filing footnotes).
• Shares owned after transaction: not specified in the provided excerpt.

Context

• M = option exercise/conversion. The filing shows an exercise followed by a same‑day disposition of an equal number of shares (common when shares are surrendered to cover exercise price or tax withholding).
• S = open‑market sale. These sales were carried out under pre‑arranged 10b5‑1 plans (routine trading plans), which helps distinguish planned dispositions from discretionary insider selling.
• This filing is factual disclosure of transactions; it does not by itself indicate the insider’s private view of the company. Purchases generally signal more new insider exposure than routine sales tied to option exercises or 10b5‑1 plans.