BLACKLINE INC

On February 20, 2024, Thomas Unterman, our Lead Independent Director, adopted a “Rule 10b5-1 trading arrangement”, as defined in Regulation S-K Item 408. The trading arrangement provided for the sale, from time to time, of an aggregate of up to 50,000 shares of our common stock, and was intended to satisfy the affirmative defense in Rule 10b5-1(c). On May 1, 2024, Mr. Unterman terminated that 10b5-1 Plan before any trades were executed under it.

On March 6, 2024, Mark Partin, our Chief Financial Officer, adopted a “Rule 10b5-1 trading arrangement,” as defined in Regulation S-K Item 408. The trading arrangement provides for the sale, from time to time, of an aggregate of up to 140,956 shares of our common stock, and is intended to satisfy the affirmative defense in Rule 10b5-1(c). The duration of the trading arrangement is until February 28, 2025 or earlier if all transactions under the trading arrangement have been completed.

On March 8, 2024, Karole Morgan-Prager, our Chief Legal and Administrative Officer, adopted a “Rule 10b5-1 trading arrangement,” as defined in Regulation S-K Item 408. The trading arrangement provides for the sale, from time to time, of an aggregate of up to 117,260 shares of our common stock, and is intended to satisfy the affirmative defense in Rule 10b5-1(c). The duration of the trading arrangement is until March 10, 2025 or earlier if all transactions under the trading arrangement have been completed.

No other officers or directors, as defined in Rule 16a-1(f), adopted, modified, orterminated a Rule10b5-1 trading arrangement as defined in Regulation S-K Item 408, during the last fiscal quarter.