BLACKLINE, INC. — Director's Dealing 2025

May 9, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: BLACKLINE, INC. (BL)
CIK: 0001666134
Period of Report: 2025-05-08

Reporting Person: Unterman Thomas (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-05-08	Common Stock	A	3776	—	Acquired	58636	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	50000	Indirect

Footnotes

F1: Reflects an automatic annual restricted stock unit ("RSU") award pursuant to the Issuer's Outside Director Compensation Policy.

F2: The reported securities awarded on May 8, 2025 (the "Award Date") represent RSUs which vest in full upon the earlier of the one (1) year anniversary of the Award Date or the day prior to the Issuer's next annual meeting of the stockholders and in each case subject to the reporting person's continued service on the Issuer's board of directors through each vesting date.