BLACKLINE, INC. — Director's Dealing 2025

May 21, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: BLACKLINE, INC. (BL)
CIK: 0001666134
Period of Report: 2025-05-20

Reporting Person: Ryan Owen (Director, CO-CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-05-20	Common Stock	F	2234	$55.43	Disposed	224778	Direct
2025-05-20	Common Stock	F	2027	$55.43	Disposed	222751	Direct

Footnotes

F1: The reported shares were withheld to cover the Reporting Person's tax liability in connection with the vesting of restricted stock units ("RSUs").

F2: Includes 400 shares acquired on May 9, 2025, through the Issuer's Employee Stock Purchase Plan in a transaction that was exempt under both Rule 16b-3(d) and Rule 16b-3(c).