Arista Networks Inc

Securities Trading Plans of Directors and Executive Officers

During our last fiscal quarter, the following director and officers, as defined in Rule 16a-1(f), adopted a “Rule 10b5-1 trading arrangement” as defined in Regulation S-K Item 408, as follows:

On September 13, 2024, Yvonne Wassenaar, amember of our Board of Directors, adopted a Rule 10b5-1 trading arrangement providing for the sale from time to time of an aggregate of 126 shares of our common stock. The trading arrangement is intended to satisfy the affirmative defense in Rule 10b5-1(c). The duration of the trading arrangement is until January 22, 2026, or earlier if all transactions under the trading arrangement are completed.

On September 5, 2024, John McCool, our Chief Platform Officer, and Senior Vice President of Engineering and Operations, adopted a Rule 10b5-1 trading arrangement providing for the sale from time to time of an aggregate of up to: (i)9,479 shares of common stock; (ii) a number of shares of our common stock that may be earned in connection with grants of performance-based restricted stock units, which cannot be determined at this time; and (iii) a number of shares of our common stock that will be purchased under the 2014 ESPP during the term of the trading arrangement, which cannot be determined at this time. The trading arrangement is intended to satisfy the affirmative defense in Rule 10b5-1(c). The duration of the trading arrange ment is until December 8, 2025, or earlier if all transactions under the trading arrangement are completed.

On September 11, 2024, Marc Taxay, our Senior Vice President and General Counsel, adopted a Rule 10b5-1 trading arrangement providing for the sale from time to time of an aggregate of up to (i)15,129 shares of common stock; and (ii) a number of shares of our common stock that may be earned in connection with grants of performance-based restricted stock units, which cannot be determined at this time. The trading arrangement is intended to satisfy the affirmative defense in Rule 10b5-1(c). The duration of the trading arrangement is until December 31, 2025, or earlier if all transactions under the trading arrangement are completed.

No other officers or directors, as defined in Rule 16a-1(f), adopted orterminated a “Rule 10b5-1 trading arrangement” or a “non-Rule 10b5-1 trading arrangement,” as defined in Regulation S-K Item 408, during the last fiscal quarter.