BLACKLINE, INC. — Director's Dealing 2025

Nov 26, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: BLACKLINE, INC. (BL)
CIK: 0001666134
Period of Report: 2025-11-25

Reporting Person: Morgan-Prager Karole (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-11-25	Common Stock	A	2860	—	Acquired	118574	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-11-25	Performance-Based Restricted Stock Units	$	A	2860	Acquired		Common Stock ()	Direct

Footnotes

F1: Each share is represented by a Restricted Stock Unit ("RSU"). 25% of the RSUs will vest on the one (1) year anniversary of November 20, 2025 (the "RSU Vesting Commencement Date"), and 1/16th of the RSUs will vest every three months thereafter on the same day of the month as the RSU Vesting Commencement Date, subject to the Reporting Person's continued service through each applicable vesting date.

F2: Each Performance-Based Restricted Stock Unit ("PRSU") represents the right to receive a number of shares of the Issuer's common stock to be determined based on the achievement of certain performance objectives. The PRSUs will vest based on the targets that will be established by the Compensation Committee of the Board of Directors of the Issuer for performance-based annual equity grants for the Issuer's executives for calendar 2026; provided, however, that if performance metrics are not established for the PRSU grants for the Issuer's executives for calendar 2026 prior to June 1, 2026, 1/6th of the PRSUs will vest on each of February 20, 2027 and February 20, 2028, with the remaining PRSUs to vest on February 20, 2029, subject to the Reporting Person's continued service through each applicable vesting date.