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 240000 39842400 1259202593 06/04/2026 NYSE Common Stock 04/13/2018 Acquired as compensation -- Stock Options Andreas Bechtolsheim N 61328 04/13/2018 Compensation -- Cashless exercise / same-day sale Common Stock 02/08/2019 Acquired as compensation -- Stock Options Andreas Bechtolsheim N 96672 02/08/2019 Compensation -- Cashless exercise / same-day sale Common Stock 05/20/2021 Acquired as compensation -- Restricted Stock Units Andreas Bechtolsheim N 1768 05/20/2021 Compensation Common Stock 08/20/2021 Acquired as compensation -- Restricted Stock Units Andreas Bechtolsheim N 10448 08/20/2021 Compensation Common Stock 08/20/2021 Acquired as compensation -- Restricted Stock Units Andreas Bechtolsheim N 17104 08/20/2021 Compensation Common Stock 11/22/2021 Acquired as compensation -- Restricted Stock Units Andreas Bechtolsheim N 10576 11/22/2021 Compensation Common Stock 11/22/2021 Acquired as compensation -- Restricted Stock Units Andreas Bechtolsheim N 17268 11/22/2021 Compensation Common Stock 02/22/2022 Acquired as compensation -- Restricted Stock Units Andreas Bechtolsheim N 13672 02/22/2022 Compensation Common Stock 05/20/2022 Acquired as compensation -- Restricted Stock Units Andreas Bechtolsheim N 10756 05/20/2022 Compensation Common Stock 08/22/2022 Acquired as compensation -- Restricted Stock Units Andreas Bechtolsheim N 408 08/22/2022 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 05/26/2026 10000 1584240 The Bechtolsheim Family Trust 5453 Great America Parkway Santa Clara CA 95054 Common Stock 05/26/2026 10000 1570402 The Bechtolsheim Family Trust 5453 Great America Parkway Santa Clara CA 95054 Common Stock 05/26/2026 10000 1582700 The Bechtolsheim Family Trust 5453 Great America Parkway Santa Clara CA 95054 Common Stock 05/26/2026 10000 1578083 The Bechtolsheim Family Trust 5453 Great America Parkway Santa Clara CA 95054 Common Stock 05/26/2026 100000 15515720 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 05/26/2026 15000 2383425 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 05/26/2026 15000 2388136.5 The Bechtolsheim Family Trust 5453 Great America Parkway Santa Clara CA 95054 Common Stock 05/26/2026 15000 2379579 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 05/26/2026 5000 782825 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 05/26/2026 5000 783192 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 05/26/2026 15000 2394196.5 The Bechtolsheim Family Trust 5453 Great America Parkway Santa Clara CA 95054 Common Stock 05/26/2026 5000 782271 The Bechtolsheim Family Trust 5453 Great America Parkway Santa Clara CA 95054 Common Stock 05/22/2026 15000 2310321 The Bechtolsheim Family Trust 5453 Great America Parkway Santa Clara CA 95054 Common Stock 05/26/2026 5000 784087.5 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 Andreas Bechtolsheim Account. 06/04/2026 02/20/2026 Goldman Sachs & Co. LLC on behalf of Andreas Bechtolsheim