Thomas Unterman's Stock Sales in BLACKLINE, INC.

Thomas Unterman, a director of BLACKLINE, INC., has reported the sale of 910 shares of common stock on 10/27/2025, with an aggregate market value of $50,050.00. This sale is part of a plan adopted on 11/21/2024. Additionally, Unterman sold 910 shares on 09/22/2025 and another 910 shares on 08/28/2025, each valued at $50,050.00. These transactions were executed through Fidelity Brokerage Services LLC. The sales occurred in The Etu Rustic Canyon Trust, where Unterman serves as a trustee and account stakeholder.