[Form 4] BlackLine, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Ryan Owen, listed as Co-CEO and a director of BlackLine, Inc. (BL), reported two share dispositions on 08/20/2025 related to restricted stock unit vesting. A total of 4,262 shares were withheld to cover the reporting person’s tax liability at a reported price of $52.23 per share. The filing shows beneficial ownership levels of 220,516 and then 218,489 shares following the reported transactions. The report was signed by an attorney-in-fact on 08/21/2025 and includes an explicit explanation that the sales were tax withholdings tied to RSU vesting.

Positive

• Continued significant ownership: Reporting person retains over 200,000 shares after transactions, indicating ongoing insider stake
• Clear disclosure: Transactions are explicitly explained as tax withholdings tied to RSU vesting

Negative

• Reduction in shares: Total of 4,262 shares were disposed of via withholding, reducing the reported holdings
• Insider liquidity: Although routine, the withholding reflects compensation realization which slightly lowers insider-held free float

Insights

Financial Analyst

TL;DR: Small, routine RSU tax-withholding disposals; ownership remains material.

The Form 4 discloses two small dispositions totaling 4,262 shares executed as tax withholdings on RSU vesting at $52.23 per share. These transactions are routine and non-discretionary, driven by payroll tax requirements rather than active selling for cash. Post-transaction beneficial ownership remains above 200,000 shares, indicating continued significant insider alignment with shareholders. There is no indication of any larger planned sales or hedging activity in this filing.

Corporate Governance Expert

TL;DR: Procedural disclosure only; no governance concerns from these entries.

The filing identifies Ryan Owen as a director and Co-CEO and explains the disposals were withholding to satisfy tax obligations on RSU vesting. The signature by an attorney-in-fact is properly provided. Because the trades are routine tax-related withholdings and not open-market sales, they do not signal governance or insider-liquidity issues in isolation. The disclosure is clear and conforms to Section 16 reporting requirements.

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^*

Ryan Owen

(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)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	CO-CEO

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		2,235(1)	D	$52.23	220,516	D
Common Stock	08/20/2025		F		2,027(1)	D	$52.23	218,489	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 Ryan Owen report on Form 4 for BlackLine (BL)?

He reported two dispositions on 08/20/2025 totaling 4,262 shares withheld to cover tax liability related to RSU vesting at $52.23 per share.

Why were shares disposed of according to the filing?

The filing states the shares were withheld to cover the Reporting Person's tax liability in connection with RSU vesting.

How many shares does Ryan Owen beneficially own after these transactions?

The filing lists beneficial ownership amounts of 220,516 and 218,489 shares following the reported transactions.

Does the Form 4 indicate open-market sales by the insider?

No. The transactions are reported as tax withholdings for RSU vesting, not as discretionary open-market sales.

Who signed the Form 4 and when?

The Form 4 was signed by an Attorney-in-Fact, Karole Morgan-Prager, on 08/21/2025.