What triggered the tax-withholding share disposition for BlackLine (BL)?

The tax-withholding disposition was triggered by the vesting of restricted stock units awarded to Stuart Van Houten. When these units vested, BlackLine withheld 1,720 shares of common stock at $30.84 per share to satisfy his associated tax liability, according to the Form 4 footnote.

BlackLine (BL) Chief Commercial Officer has 1,720 shares withheld to cover RSU tax liability

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

BLACKLINE, INC. Chief Commercial Officer Stuart Van Houten reported a routine tax-related share disposition tied to equity compensation. The company withheld 1,720 shares of common stock at $30.84 per share to cover his tax liability upon vesting of restricted stock units. After this withholding, he directly holds 108,686 shares of BlackLine common stock, so the event reflects tax settlement rather than an open-market sale.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Van Houten Stuart

Role Chief Commercial Officer

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	1,720	$30.84	$53K

Holdings After Transaction: Common Stock — 108,686 shares (Direct, null)

Footnotes (1)

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Key Figures

Tax-withheld shares: 1,720 shares Withholding price: $30.84/share Post-transaction holdings: 108,686 shares

3 metrics

Tax-withheld shares 1,720 shares Shares withheld to cover tax liability on RSU vesting

Withholding price $30.84/share Value per share for tax-withholding disposition

Post-transaction holdings 108,686 shares Direct BlackLine common stock held after tax withholding

Key Terms

restricted stock units, tax liability, Common Stock, tax-withholding disposition

4 terms

restricted stock units financial

"in connection with the vesting of restricted stock units"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

tax liability financial

"withheld to cover the Reporting Person's tax liability"

Common Stock financial

"security_title": "Common Stock""

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

tax-withholding disposition financial

"transaction_action": "tax-withholding disposition""

A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.

Form 4 Insider Transactions: What Each Field Means →

05/21/2026 - 04:27 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^*

Van Houten Stuart

(Last)

(First)

(Middle)

21300 VICTORY BLVD., 12TH FLOOR

(Street)

WOODLAND HILLS

CALIFORNIA

91367

(City)

(State)

(Zip)

UNITED STATES

(Country)

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 Commercial Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/20/2026

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

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

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

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	05/20/2026		F		1,720⁽¹⁾	D	$30.84	108,686	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

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.

	/s/ Karole Morgan-Prager, Attorney-in-Fact	05/21/2026
	** 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.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR

FAQ

What did BlackLine (BL) executive Stuart Van Houten report in this Form 4?

Stuart Van Houten reported shares withheld to pay taxes on vested restricted stock units. BlackLine withheld 1,720 common shares at $30.84 each. This is a tax-withholding disposition, not an open-market purchase or sale, and reflects routine equity compensation processing.

How many BlackLine (BL) shares were withheld for Stuart Van Houten’s taxes?

BlackLine withheld 1,720 shares of common stock from Stuart Van Houten. The shares were valued at $30.84 each and used to satisfy his tax liability when restricted stock units vested, as disclosed in the Form 4 footnote.

What is Stuart Van Houten’s BlackLine (BL) shareholding after this transaction?

After the tax-withholding disposition, Stuart Van Houten directly holds 108,686 shares of BlackLine common stock. This figure reflects his remaining ownership following the 1,720 shares withheld to cover taxes on vested restricted stock units reported in the Form 4.

Was the BlackLine (BL) Form 4 transaction an open-market sale or purchase?

The Form 4 reports no open-market sales or purchases. Instead, it shows a tax-withholding disposition, where 1,720 shares were withheld by BlackLine at $30.84 per share to cover Stuart Van Houten’s tax liability from restricted stock unit vesting.

What role does Stuart Van Houten hold at BlackLine (BL)?

Stuart Van Houten serves as BlackLine’s Chief Commercial Officer. In this capacity, he receives equity compensation such as restricted stock units, which can trigger tax-withholding share dispositions like the 1,720-share withholding disclosed in the latest Form 4 filing.