Therese Tucker - 20 Feb 2026 Form 4 Insider Report for BLACKLINE, INC. (BL)

Role: Founder, Director
Signature: /s/ Karole Morgan-Prager, Attorney-in-Fact
Issuer symbol: BL
Transactions as of: 20 Feb 2026
Net transactions value: +$380,732
Form type: 4
Filing time: 24 Feb 2026, 17:46:59 UTC
Previous filing: 20 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Tucker Therese	Founder, Director	21300 VICTORY BLVD., 12TH FLOOR, WOODLAND HILLS	/s/ Karole Morgan-Prager, Attorney-in-Fact	24 Feb 2026	0001688365

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	BL	Common Stock	Options Exercise	$786,660	+21,761	+6.2%	$36.15	372,889	20 Feb 2026	Direct	F1
transaction	BL	Common Stock	Options Exercise	$337,352	+9,332	+2.5%	$36.15	382,221	20 Feb 2026	Direct	F2
transaction	BL	Common Stock	Options Exercise	$405,784	+11,225	+2.9%	$36.15	393,446	20 Feb 2026	Direct	F3
transaction	BL	Common Stock	Tax liability	$1,149,064	-31,786	-8.1%	$36.15	361,660	20 Feb 2026	Direct	F4
holding	BL	Common Stock						100,178	20 Feb 2026	Brian and Therese Tucker Charitable Remainder Trust
holding	BL	Common Stock						1,509,881	20 Feb 2026	Brian and Therese Tucker Living Trust
holding	BL	Common Stock						54,074	20 Feb 2026	Claire Seimetz 2015 Trust
holding	BL	Common Stock						577,200	20 Feb 2026	Isaac Tucker 2012 Irrevocable Trust
holding	BL	Common Stock						577,200	20 Feb 2026	Roseanna Tucker 2012 Irrevocable Trust
holding	BL	Common Stock						52,444	20 Feb 2026	Tucker Family CLAT
holding	BL	Common Stock						874,128	20 Feb 2026	Tucker Legacy Trust
holding	BL	Common Stock						129,897	20 Feb 2026	Tucker Legacy Trust II
holding	BL	Common Stock						250,916	20 Feb 2026	Tucker Seimetz Safety Net Grat

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The reported shares relate to the portion of a Performance Based Restricted Stock Unit ("PRSU") granted on March 7, 2023 that has vested based on the Issuer's achievement of certain fiscal 2023 performance targets that were set by the Compensation Committee at the time of grant.
F2	The reported shares relate to the portion of a PRSU granted on March 17, 2024 that has vested based on the Issuer's achievement of certain fiscal 2024 performance targets that were set by the Compensation Committee at the time of grant.
F3	The reported shares relate to the portion of a 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.
F4	The reported shares were withheld to cover the reporting person's tax liability in connection with the vesting of PRSUs and restricted stock units.