[Form 4] BLACKLINE, INC. Insider Trading Activity

Rhea-AI Filing Summary

BlackLine, Inc. (BL) reported a Form 4 filing for its Chief Accounting Officer. On 11/20/2025, the officer had multiple small dispositions of common stock totaling several hundred shares, at a reported price of $53.49 per share. Individual tax-withholding transactions included 172, 143, 161, and 265 shares, all coded as dispositions. After these transactions, the officer beneficially owned 23,089 shares directly. The company states that the shares were withheld to cover the reporting person’s tax liability arising from the vesting of restricted stock units, meaning these were administrative tax events rather than open-market sales.

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

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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^*

Stalick Michelle D

(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 Accounting Officer

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		172(1)	D	$53.49	23,658	D
Common Stock	11/20/2025		F		143(1)	D	$53.49	23,515	D
Common Stock	11/20/2025		F		161(1)	D	$53.49	23,354	D
Common Stock	11/20/2025		F		265(1)	D	$53.49	23,089	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, Attorney-in-Fact	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 does BlackLine (BL) disclose in this Form 4 filing?

The filing reports that BlackLine's Chief Accounting Officer had several small dispositions of common stock on 11/20/2025, related to tax withholding on vested RSUs.

How many BlackLine (BL) shares did the officer dispose of for taxes?

The Form 4 lists dispositions of 172, 143, 161, and 265 BlackLine common shares, each at a reported price of $53.49 per share.

How many BlackLine (BL) shares does the officer own after these transactions?

Following the reported transactions, the officer beneficially owned 23,089 shares of BlackLine common stock in direct ownership.

Were the BlackLine (BL) share dispositions open-market sales?

No. The explanation states the reported shares were withheld to cover the reporting person’s tax liability from the vesting of restricted stock units, indicating administrative tax withholding rather than open-market selling.

What is the role of the reporting person at BlackLine (BL)?

The reporting person is identified as an Officer, serving as BlackLine’s Chief Accounting Officer.

Is this BlackLine (BL) Form 4 filed by one or multiple reporting persons?

The Form 4 is indicated as being filed by one reporting person, not a group filing.