[Form 4] BlackLine, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Jeremy Ung, Chief Technology Officer of BlackLine, Inc. (BL), reported a share disposition on 08/20/2025. He had 1,388 shares withheld at a price of $52.23 per share to cover tax withholding related to the vesting of restricted stock units. After this withholding, Mr. Ung beneficially owned 85,061 shares, held directly. The Form 4 was filed by one reporting person and the filing was signed by an attorney-in-fact on 08/21/2025.

Positive

• Transaction was an administrative tax-withholding related to RSU vesting rather than an active market sale for liquidity
• Reporting person retains a substantial direct holding of 85,061 shares after the withholding

Negative

• None.

Insights

Securities Analyst

TL;DR: Insider sold shares to satisfy RSU tax withholding; ownership remains substantial and the transaction appears routine.

The Form 4 discloses a non-derivative disposition of 1,388 common shares at $52.23 on 08/20/2025, explicitly described as shares withheld to cover tax obligations from RSU vesting. Such withholdings are administrative and do not indicate active cash sales by the officer. The reporting person retains 85,061 shares direct, which remains a meaningful equity stake that preserves alignment with shareholders. No other transactions, pledges, or derivative activity are reported, and the filing was executed by an attorney-in-fact.

Corporate Governance Specialist

TL;DR: Transaction is standard for equity compensation; governance implications are minimal.

Withholding shares to satisfy tax liabilities upon RSU vesting is a common administrative action and does not reflect discretionary insider selling for liquidity. The report clarifies the nature of the disposition and confirms direct beneficial ownership of 85,061 shares after the event. The single-person filing and attorney-in-fact signature follow normal procedural practice. There are no governance flags such as accelerated sales, related-party transfers, or option exercises disclosed.

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^*

Ung Jeremy

(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 Technology Officer

3. Date of Earliest Transaction (Month/Day/Year)
08/20/2025

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	08/20/2025		F		1,388(1)	D	$52.23	85,061	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	08/21/2025
	** 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 did Jeremy Ung report on Form 4 for BL?

He reported a disposition of 1,388 common shares on 08/20/2025 at a price of $52.23; the shares were withheld to cover taxes from RSU vesting.

How many BlackLine (BL) shares does the reporting person own after the transaction?

The reporting person beneficially owned 85,061 shares following the reported transaction.

Was the sale by Jeremy Ung a market sale or tax withholding?

The Form 4 explains the reported shares were withheld to cover tax liability in connection with RSU vesting.

Who signed the Form 4 filing and when was it filed?

The form was signed by Karole Morgan-Prager, Attorney-in-Fact on 08/21/2025; the reported transaction date is 08/20/2025.

What is Jeremy Ung's role at BlackLine?

He is reported as the company's Chief Technology Officer (CTO).