[Form 4] BLACKLINE, INC. Insider Trading Activity

Rhea-AI Filing Summary

BlackLine, Inc. (BL)11/20/2025, several dispositions of common stock were reported at a price of $53.49 per share, coded as transaction type "F," which indicates shares were withheld by the company.

The explanation states that these shares were withheld to cover the reporting person’s tax liability upon the vesting of restricted stock units. After the largest reported withholding of 7,084 shares, the officer directly beneficially owned 115,714 shares of BlackLine common stock.

11/24/2025 - 06:03 PM

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Morgan-Prager Karole

(Last) (First) (Middle)

21300 VICTORY BLVD., 12TH FLOOR

(Street)

WOODLAND HILLS CA 91367

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
BLACKLINE, INC. [ BL ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	CHIEF LEGAL AND ADMINISTRATIVE

3. Date of Earliest Transaction (Month/Day/Year)
11/20/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	11/20/2025		F		571(1)	D	$53.49	124,456	D
Common Stock	11/20/2025		F		776(1)	D	$53.49	123,680	D
Common Stock	11/20/2025		F		882(1)	D	$53.49	122,798	D
Common Stock	11/20/2025		F		7,084(1)	D	$53.49	115,714	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The reported shares were withheld to cover the Reporting Person's tax liability in connection with the vesting of restricted stock units ("RSUs").

	/s/ Karole Morgan-Prager	11/24/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transaction did BlackLine (BL) report on this Form 4?

The Form 4 reports that a BlackLine officer had company common shares withheld, coded as transaction type "F," to satisfy tax obligations related to vesting restricted stock units.

Who is the reporting person in this BlackLine (BL) Form 4 filing?

The reporting person is an officer of BlackLine, Inc. serving as Chief Legal and Administrative, who reports direct ownership of company common stock.

Why were BlackLine (BL) shares disposed of in this Form 4?

According to the explanation of responses, the reported shares were withheld to cover the reporting person’s tax liability in connection with the vesting of restricted stock units ("RSUs").

At what price were the BlackLine (BL) shares withheld in the reported transactions?

Each reported disposition of BlackLine common stock was at a price of $53.49 per share in connection with the RSU tax withholding.

How many BlackLine (BL) shares did the officer own after the largest withholding event?

After the transaction in which 7,084 shares were withheld, the reporting officer beneficially owned 115,714 shares of BlackLine common stock directly.

Does this BlackLine (BL) Form 4 indicate open-market selling by the insider?

The transactions are coded "F" and the explanation states the shares were withheld to cover RSU-related tax liability, indicating company withholding rather than open-market sales.