144 0001605809 XXXXXXXX LIVE 0001596532 Arista Networks, Inc. 001-36468 5453 Great America Parkway Santa Clara CA 95054 4085475000 Jayshree Ullal Officer and Director Common J.P. Morgan Securities LLC

360 Madison Avenue - 6th Floor New York NY 10017

1276 124193 1255921431 06/26/2025 NYSE Common 01/01/2013 Stock Option Exercise Issuer N 1276 01/01/2013 NA Y The shares filed today will be sold by The Shriya Nagpal Trust - Jayshree Ullal as Trustee The securities to be sold were acquired from stock option exercises by Jayshree Ullal and transferred to the Trust on various dates between 1/1/2013 and 12/31/2013. 06/26/2025 12/13/2024 /s/ J.P. Morgan Securities LLC as agent and attorney-in-fact forJayshree Ullal