Form 4 Filing for Blackline, Inc. - Officer Stock Transactions

This filing details stock transactions made by Karole Morgan-Prager, Chief Legal and Administrative Officer of Blackline, Inc., on May 20, 2026. A total of 2,725 shares of Common Stock were disposed of, with the shares withheld to cover tax liabilities related to the vesting of restricted stock units. The transactions were conducted at a price of $30.84 per share. Following these transactions, the post-transaction share ownership for Ms. Morgan-Prager is reported as follows: 164,881 shares after the first disposition, 163,997 shares after the second, and 162,934 shares after the third. The filing is designated as Form 4, indicating a change in beneficial ownership.