BLACKLINE INC

On November 14, 2023, 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 10,007 shares of our common stock, and is intended to satisfy the affirmative defense in Rule 10b5-1(c). The number of shares sold under the trading arrangement will be reduced by the number of shares sold to cover applicable withholding taxes. The duration of the trading arrangement is until November 15, 2024 or earlier if all transactions under the trading arrangement have been completed.

On November 30, 2023, Kevin Thompson, who is amember of our Board, 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 8,000 shares of our common stock, and is intended to satisfy the affirmative defense in Rule 10b5-1(c). The number of shares sold under the trading arrangement will be reduced by the number of shares sold to cover applicable withholding taxes. The duration of the trading arrangement is until March 3, 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.