[144] BLACKLINE, INC. SEC Filing

Rhea-AI Filing Summary

Form 144 notice for BlackLine, Inc. (BL) reports a proposed sale of 910 shares of common stock through Fidelity Brokerage Services on 09/22/2025 with an aggregate market value of $50,050.00. The filing shows 61,887,825 shares outstanding for the class, and the shares to be sold were acquired by the seller on 09/03/2013 via stock option exercise for cash.

The filing also discloses two recent sales by the same seller: 885 shares on 07/21/2025 for $50,179.50 and 910 shares on 08/28/2025 for $50,050.00. The filer attests there is no undisclosed material adverse information and the notice includes the statutory warning about false statements.

Insights

Securities Analyst

TL;DR: Routine small-volume insider sale, immaterial relative to outstanding shares.

The proposed sale of 910 shares valued at $50,050 represents a de minimis portion of the reported 61,887,825 shares outstanding (well below materiality thresholds). The transaction stems from a 2013 stock option exercise, indicating the seller is disposing of long-held vested equity rather than receiving new economic benefit. Recent nearby sales (885 and 910 shares) suggest a pattern of modest disposals rather than a single large liquidation. For investors, this filing is a disclosure of insider activity but is unlikely to move valuation metrics given the small absolute and relative amounts.

Corporate Compliance Officer

TL;DR: Filing meets Rule 144 disclosure requirements and includes required attestation.

The Form 144 documents the broker, sale date, quantity, and acquisition details as required. It specifies the broker (Fidelity Brokerage Services), dates of prior sales in July and August 2025, and confirms the securities were acquired by stock option exercise paid in cash. The signer represents no undisclosed material adverse information and the form contains the statutory criminal-warning language. From a compliance perspective, the notice appears complete for the transactions reported.

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	910	50050.00	61887825	09/22/2025	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	09/03/2013	Stock Option Exercise	Issuer			910	09/03/2013	Cash

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
The Etu Rustic Canyon Trust 21300 Victory Boulevard 12th Floor Woodland Hills CA 91367	Common	07/21/2025	885	50179.50
The Etu Rustic Canyon Trust 21300 Victory Boulevard 12th Floor Woodland Hills CA 91367	Common	08/28/2025	910	50050.00

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

ATTENTION:

The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does the BL Form 144 filed here report?

The notice reports a proposed sale of 910 common shares of BlackLine, Inc. through Fidelity Brokerage Services on 09/22/2025 valued at $50,050.00.

How and when were the shares being sold acquired?

The 910 shares were acquired on 09/03/2013 by stock option exercise, with payment made in cash.

Have there been recent sales by the same seller reported in this filing?

Yes. The seller sold 885 shares on 07/21/2025 for $50,179.50 and 910 shares on 08/28/2025 for $50,050.00.

What broker is handling the proposed sale?

The filing lists Fidelity Brokerage Services LLC, 900 Salem Street, Smithfield RI 02917 as the broker.

How large is this sale relative to shares outstanding?

The sale of 910 shares is small relative to the reported 61,887,825 shares outstanding for the class.