BLACKLINE, INC. — Director's Dealing 2021

May 22, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: BLACKLINE, INC. (BL)
CIK: 0001666134
Period of Report: 2021-05-20

Reporting Person: Huffman Marc (Director, Chief Executive Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-05-20	Common Stock	F	3778	$104.54	Disposed	129348	Direct
2021-05-21	Common Stock	S	3541	$105.96	Disposed	125807	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.

F2: The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 4, 2020.