On March 28, 2022, Ann Mather, a Class II director, notified Arista Networks, Inc. (the “Company”) that she will not stand for re-election as a director at the end of her current term and intends to resign from the board of directors of the Company (“Board”), effective as of the date of the Company's 2022 Annual Meeting of Stockholders (the “Effective Date”). Ms. Mather's decision to leave the Board is due to her desire to devote more time to her other professional commitments and is not the result of any disagreement with the Company relating to the Company's operations, policies or practices.