Michelle D. Stalick, Chief Accounting Officer of BLACKLINE, INC., Disposes of 16,420 Restricted Stock Units

On April 1, 2026, Michelle D. Stalick, Chief Accounting Officer of BLACKLINE, INC., acquired 16,420 Restricted Stock Units (RSUs) with a transaction price of $0.00 per share. This transaction is reported under Form 4. The RSUs are subject to a vesting schedule: 25% vest on February 20, 2027, and the remainder vest in 16 equal installments every three months thereafter, contingent upon continued service. Following this acquisition, Ms. Stalick holds 38,014 shares. This filing is classified as an OFFICER_DIRECTOR_CHANGE due to the nature of stock transactions by a key executive.