144 0001133206 XXXXXXXX LIVE 0001596532 Arista Networks, Inc. 001-36468 5453 Great America Parkway Santa Clara CA 95054 1-408-547-5500 Andreas Bechtolsheim 10% Stockholder Common Stock Goldman Sachs & Co. LLC 200 West Street New York NY 10282 220000 34762200 1259202593 05/26/2026 NYSE Common Stock 08/20/2019 Acquired as compensation -- Restricted Stock Units Andreas Bechtolsheim N 15960 08/20/2019 Compensation Common Stock 11/20/2019 Acquired as compensation -- Restricted Stock Units Andreas Bechtolsheim N 16640 11/20/2019 Compensation Common Stock 11/20/2019 Acquired as compensation -- Restricted Stock Units Andreas Bechtolsheim N 10080 11/20/2019 Compensation Common Stock 02/20/2020 Acquired as compensation -- Restricted Stock Units Andreas Bechtolsheim N 13072 02/20/2020 Compensation Common Stock 02/20/2020 Acquired as compensation -- Restricted Stock Units Andreas Bechtolsheim N 21216 02/20/2020 Compensation Common Stock 05/20/2020 Acquired as compensation -- Restricted Stock Units Andreas Bechtolsheim N 10080 05/20/2020 Compensation Common Stock 05/20/2020 Acquired as compensation -- Restricted Stock Units Andreas Bechtolsheim N 19200 05/20/2020 Compensation Common Stock 08/20/2020 Acquired as compensation -- Restricted Stock Units Andreas Bechtolsheim N 16624 08/20/2020 Compensation Common Stock 08/20/2020 Acquired as compensation -- Restricted Stock Units Andreas Bechtolsheim N 10080 08/20/2020 Compensation Common Stock 11/20/2020 Acquired as compensation -- Restricted Stock Units Andreas Bechtolsheim N 10080 11/20/2020 Compensation Common Stock 11/20/2020 Acquired as compensation -- Restricted Stock Units Andreas Bechtolsheim N 16640 11/20/2020 Compensation Common Stock 02/22/2021 Acquired as compensation -- Restricted Stock Units Andreas Bechtolsheim N 12928 02/22/2021 Compensation Common Stock 02/22/2021 Acquired as compensation -- Restricted Stock Units Andreas Bechtolsheim N 21696 02/22/2021 Compensation Common Stock 05/20/2021 Acquired as compensation -- Restricted Stock Units Andreas Bechtolsheim N 17152 05/20/2021 Compensation Common Stock 05/20/2021 Acquired as compensation -- Restricted Stock Units Andreas Bechtolsheim N 8552 05/20/2021 Compensation N The Bechtolsheim Family Trust 5453 Great America Parkway Santa Clara CA 95054 Common Stock 05/22/2026 10000 1526350 The Bechtolsheim Family Trust 5453 Great America Parkway Santa Clara CA 95054 Common Stock 05/22/2026 5000 758927.5 The Bechtolsheim Family Trust 5453 Great America Parkway Santa Clara CA 95054 Common Stock 05/22/2026 100000 15044090 The Bechtolsheim Family Trust 5453 Great America Parkway Santa Clara CA 95054 Common Stock 05/22/2026 15000 2303472 The Bechtolsheim Family Trust 5453 Great America Parkway Santa Clara CA 95054 Common Stock 05/22/2026 5000 761216 The Bechtolsheim Family Trust 5453 Great America Parkway Santa Clara CA 95054 Common Stock 05/22/2026 10000 1529708 The Bechtolsheim Family Trust 5453 Great America Parkway Santa Clara CA 95054 Common Stock 05/22/2026 15000 2298204 The Bechtolsheim Family Trust 5453 Great America Parkway Santa Clara CA 95054 Common Stock 05/22/2026 5000 759835.5 The Bechtolsheim Family Trust 5453 Great America Parkway Santa Clara CA 95054 Common Stock 05/22/2026 10000 1523728 The Bechtolsheim Family Trust 5453 Great America Parkway Santa Clara CA 95054 Common Stock 05/22/2026 10000 1530782 The Bechtolsheim Family Trust 5453 Great America Parkway Santa Clara CA 95054 Common Stock 05/22/2026 5000 760713.5 The Bechtolsheim Family Trust 5453 Great America Parkway Santa Clara CA 95054 Common Stock 05/22/2026 15000 2310321 The sales of shares set forth herein are made in connection with a selling plan dated 2/20/2026 that is intended to comply with Rule 10b5-1 (c). All shares to be sold out of the Bechtolsheim Family Trust. 05/26/2026 02/20/2026 Goldman Sachs & Co. LLC on behalf of Andreas Bechtolsheim