BlackLine (NYSE: BL) CCO now holds 106,966 shares after tax withholding

Rhea-AI Filing Summary

BLACKLINE, INC. (BL) insider Stuart Van Houten, Chief Commercial Officer, reported a Form 4 transaction involving company common stock. On 2026-08-20, 1,720 shares were disposed of at $31.92 per share to satisfy tax withholding obligations arising from the vesting of restricted stock units. After this withholding, Van Houten directly holds 106,966 shares of BlackLine common stock.

Insider Trade Summary

Net Seller: 1,720 shares

Net Sell 1 txn

Insider Van Houten Stuart

Role Chief Commercial Officer

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock F1	1,720	$31.92	$55K

Holdings After Transaction: Common Stock — 106,966 shares (Direct)

Footnotes (1)

1. F1. The reported shares were withheld to cover the Reporting Person's tax liability in connection with the vesting of restricted stock units.

Key Figures

Shares withheld for tax liability: 1,720 shares Per-share value for tax withholding: $31.92 per share Shares owned after transaction: 106,966 shares

3 metrics

Shares withheld for tax liability 1,720 shares Common stock disposed of on 2026-08-20 under code F

Per-share value for tax withholding $31.92 per share Valuation applied to the 1,720 withheld shares on 2026-08-20

Shares owned after transaction 106,966 shares Direct holdings of common stock after the tax-withholding disposition

Key Terms

restricted stock units, tax liability, withheld to cover

3 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"

withheld to cover financial

"The reported shares were withheld to cover the Reporting Person's"

FAQ

What insider transaction did BL report for Stuart Van Houten on August 20, 2026?

Stuart Van Houten reported the disposition of 1,720 shares of BLACKLINE, INC. common stock on 2026-08-20 at $31.92 per share to cover tax withholding from vesting restricted stock units.

Was the August 20, 2026 BL insider transaction an open-market sale?

No. The 1,720 shares reported for BLACKLINE, INC. on 2026-08-20 were withheld to cover tax liability related to vesting restricted stock units, not an elective open-market sale.

How many BL shares does Stuart Van Houten hold after this Form 4 transaction?

Following the tax-withholding disposition, Stuart Van Houten directly holds 106,966 shares of BLACKLINE, INC. common stock as reported in the Form 4.

What was the price used for the BL tax-withholding shares on August 20, 2026?

The 1,720 shares of BLACKLINE, INC. common stock withheld for tax purposes on 2026-08-20 were valued at $31.92 per share in the Form 4.

What does transaction code F mean in the BL Form 4 for Stuart Van Houten?

Transaction code F indicates payment of tax liability by delivering or withholding securities. For BLACKLINE, INC., 1,720 shares were withheld to cover Stuart Van Houten’s tax obligations from vesting restricted stock units.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/24/2026 - 04:46 PM Accepted by SEC EDGAR 08/24/2026 - 04:45 PM Learn about SEC filing dates

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)
08/20/2026

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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	08/20/2026		F		1,720(1)	D	$31.92	106,966	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.

	/s/ Karole Morgan-Prager, Attorney-in-Fact	08/24/2026
	** 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)