Mark Partin - Sep 17, 2021 Form 4 Insider Report for BLACKLINE, INC. (BL)

Role: Chief Financial Officer
Signature: /s/ Karole Morgan-Prager, Attorney-in-Fact
Stock symbol: BL
Transactions as of: Sep 17, 2021
Transactions value $: -$91,463
Form type: 4
Date filed: 9/20/2021, 06:24 PM
Previous filing: Sep 10, 2021
Next filing: Sep 27, 2021

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	BL	Common Stock	Options Exercise	$11.5K	+820	+0.87%	$14.00	95K	Sep 17, 2021	Direct	F1
transaction	BL	Common Stock	Sale	-$103K	-820	-0.86%	$125.54	94.1K	Sep 17, 2021	Direct	F1, F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	BL	Stock Option (right to buy)	Options Exercise	$0	-820	-0.47%	$0.00	174K	Sep 17, 2021	Common Stock	820	$14.00	Direct	F1, F3

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

Explanation of Responses:

Id	Content
F1	The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 12, 2021.
F2	The sale price represents the weighted-average price of shares sold ranging from $125.23 to $125.82 per share. Upon request by the Securities and Exchange Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.
F3	The shares subject to the option vest in 4 equal, annual installments beginning on the one year anniversary of January 20, 2015.