[Form 4] BlackLine, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Michelle D. Stalick, Chief Accounting Officer of BlackLine, Inc. (BL), reported a sale of company stock on 08/22/2025. The Form 4 shows she disposed of 664 shares at a weighted-average price of $54.03 per share (purchase price range $54.02–$54.04 as explained). Following the reported transaction she beneficially owned 23,830 shares, held directly. The filing was signed by an attorney-in-fact on 08/25/2025. This disclosure documents a routine insider sale under Section 16 reporting requirements and includes an explanation of the weighted-average pricing.

Positive

• Timely and compliant disclosure of the insider sale under Section 16 with required price-range explanation
• No derivative or complex transactions reported alongside the sale, indicating a straightforward open-market disposition

Negative

• Insider sold shares (664 shares) which may be perceived negatively by some investors
• Filing lacks context on purpose of sale or relative ownership stakes, so materiality cannot be assessed from this document alone

Insights

Corporate Governance Expert

TL;DR: Routine, small-scale insider sale properly disclosed under Section 16; no additional context in filing to judge motive or materiality.

The Form 4 indicates a sale of 664 shares by the Chief Accounting Officer at a weighted-average price of $54.03, leaving 23,830 shares beneficially owned. The filing includes the priced range and an attorney-in-fact signature, indicating compliance with reporting formalities. The transaction appears to be a single open-market sale; the filing contains no information on any trading plan, hedging, or other contemporaneous transactions. Without broader ownership context or company capitalization data in this filing, the sale's materiality to investors cannot be determined from this document alone.

Securities Analyst

TL;DR: Disclosure is complete for the reported trade, but the filing provides no operational or financial signals about BlackLine.

The report documents compliance with Section 16 timing and disclosure requirements: transaction date 08/22/2025, sale code "S", 664 shares sold at a weighted-average $54.03, and 23,830 shares retained. The explanation clarifies the weighted-average pricing range. There is no derivative activity reported and no amendment history. From an investor-impact perspective, this is a routine insider report; the filing does not include information that would directly change company valuation metrics.

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^*

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)
08/22/2025

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	08/22/2025		S		664	D	$54.03(1)	23,830	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 purchase price represents the weighted-average price of shares purchased ranging from $54.02 to $54.04 per share, and is rounded to the nearest tenth of a cent. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the reporting person will provide full information regarding the number of shares purchased at each separate price with the range set forth in this Form 4.

	/s/ Karole Morgan-Prager, Attorney-in-Fact	08/25/2025
	** 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 BlackLine (BL) insider Michelle Stalick report on Form 4?

The filing reports a sale of 664 shares by Michelle Stalick on 08/22/2025 at a weighted-average price of $54.03 per share, leaving 23,830 shares beneficially owned.

Was the Form 4 for BL filed on time and signed?

Yes; the Form 4 shows the reporting person’s attorney-in-fact signed the filing on 08/25/2025, consistent with the transaction date disclosed.

Does the filing show any option exercises or derivative transactions for BL insider?

No; Table II for derivative securities contains no entries, indicating no derivative or option activity was reported in this Form 4.

What price range was used to calculate the weighted-average price on the Form 4?

The filing explains the weighted-average purchase price ranged from $54.02 to $54.04, rounded to the nearest tenth of a cent.

How many shares did the reporting person own after the sale?

Following the reported transaction the reporting person beneficially owned 23,830 shares (direct ownership).