Officer Stock Acquisition

Karole Morgan-Prager, Chief Legal and Administrative at BLACKLINE, INC., acquired 46,510 shares of Common Stock on April 1, 2026, for $0.00 per share. This acquisition was made through Restricted Stock Units (RSUs) that vest over time, with 25% vesting one year after February 20, 2026, and the remainder vesting in sixteen equal installments every three months thereafter, contingent upon continued service. Following this transaction, Morgan-Prager now owns 165,659 shares of Common Stock directly.