BlackLine (BL) accounting chief sells 780 shares, keeps 34,712

Rhea-AI Filing Summary

BLACKLINE, INC. (BL) reported that Chief Accounting Officer Michelle D. Stalick sold 780 shares of common stock on 2026-08-27 at $33.65 per share in an open-market or private transaction. After this sale, she directly holds 34,712 shares of BlackLine common stock. The filing indicates the Rule 10b5-1 trading plan checkbox was not marked.

Insider Trade Summary

Net Seller: 780 shares

Net Sell 1 txn

Insider Stalick Michelle D

Role Chief Accounting Officer

Sold 780 shs ($26K)

Type	Security	Shares	Price	Value
Sale	Common Stock	780	$33.65	$26K

Holdings After Transaction: Common Stock — 34,712 shares (Direct)

Key Figures

Shares sold: 780 shares Sale price per share: $33.65 per share Shares owned after transaction: 34,712 shares +1 more

4 metrics

Shares sold 780 shares Common stock sold by Chief Accounting Officer on 2026-08-27

Sale price per share $33.65 per share Price for the 780 BL common shares sold

Shares owned after transaction 34,712 shares Directly held by Michelle D. Stalick after the sale

Net buy/sell shares -780 shares Net effect of reported transactions in this Form 4

Key Terms

open market or private transaction, Common Stock, direct ownership

3 terms

open market or private transaction market

"Sale in open market or private transaction"

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.

direct ownership financial

"ownership_type: direct"

FAQ

What insider transaction did BL report in this Form 4?

BLACKLINE, INC. reported that Chief Accounting Officer Michelle D. Stalick sold 780 shares of common stock on 2026-08-27 in an open-market or private transaction at $33.65 per share.

How many BL shares did Michelle D. Stalick sell and at what price?

Michelle D. Stalick sold 780 shares of BLACKLINE, INC. common stock at a price of $33.65 per share on 2026-08-27.

How many BL shares does Michelle D. Stalick own after this transaction?

After the reported sale, Michelle D. Stalick directly owns 34,712 shares of BLACKLINE, INC. common stock, as stated in the Form 4.

Was the BL insider transaction made under a Rule 10b5-1 trading plan?

The Form 4 indicates that the Rule 10b5-1 trading plan checkbox was not marked, so the reported sale of 780 shares by Michelle D. Stalick was not affirmed as being made under a Rule 10b5-1 trading plan.

Is the reported BL insider transaction a buy or a sell?

The reported insider transaction for BLACKLINE, INC. is a sale of 780 shares of common stock by Chief Accounting Officer Michelle D. Stalick at $33.65 per share.

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Available on EDGAR 08/28/2026 - 04:55 PM Accepted by SEC EDGAR 08/28/2026 - 04:54 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^*

Stalick Michelle D

(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 Accounting Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/27/2026

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	08/27/2026		S		780	D	$33.65	34,712	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:

	/s/ Karole Morgan-Prager, Attorney-in-Fact	08/28/2026
	** 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)