BLACKLINE, INC. — Director's Dealing 2025

May 22, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

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

Reporting Person: Woodhams Mark (Chief Revenue Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-05-20	Common Stock	F	659	$55.43	Disposed	64755	Direct
2025-05-20	Common Stock	F	706	$55.43	Disposed	64049	Direct
2025-05-20	Common Stock	F	803	$55.43	Disposed	63246	Direct
2025-05-21	Common Stock	S	1856	$54.65	Disposed	61390	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: The transaction reported on this Form 4 was effectuated pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 13, 2024.