Arista Networks Inc

Securities Trading Plans of Directors and Executive Officers

During our last fiscal quarter, the following directors and officer, 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 December 5, 2023, Ita Brennan, our Senior Vice President and Chief Financial Officer, modified the Rule 10b5-1 trading arrangement previously adopted June 8, 2023 providing for the sale from time to time of an aggregate of up to 58,000 shares of our common stock to adjust scheduled sales dates as a result of her planned departure from the Company. The trading arrangement is intended to satisfy the affirmative defense in Rule 10b5-1(c). The duration of the trading arrangement is until September 8, 2024, or earlier if all transactions under the trading arrangement are completed.

On December 14, 2023, Jayshree Ullal, our Chairperson and Chief Executive Officer, adopted a Rule 10b5-1 trading arrangement providing for the sale from time to time of an aggregate of up to 538,270 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 March 14, 2025, or earlier if all transactions under the trading arrangement are completed.

On December 14, 2023, Anshul Sadana, our Chief Operating Officer, adopted a Rule 10b5-1 trading arrangement providing for the sale from time to time of an aggregate of up to 126,861 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 March 13, 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.