BLACKLINE, INC. — Director's Dealing 2026

Feb 24, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: BLACKLINE, INC. (BL)
CIK: 0001666134
Period of Report: 2026-02-20

Reporting Person: Van Houten Stuart (CHIEF COMMERCIAL OFFICER)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-02-20	Common Stock	M	8979	$36.15	Acquired	69979	Direct
2026-02-20	Common Stock	F	7453	$36.15	Disposed	62526	Direct

Footnotes

F1: The reported shares relate to the portion of a Performance Based Restricted Stock Unit ("PRSU") granted on April 2, 2025 that has vested based on the Issuer's achievement of certain fiscal 2025 performance targets that were set by the Compensation Committee at the time of grant.

F2: The reported shares were withheld to cover the reporting person's tax liability in connection with the vesting of PRSUs and restricted stock units.