BL files Form 144 to sell 20,000 shares

BL filed a Form 144 reporting a proposed sale of 20,000 shares of Common Stock through Fidelity Brokerage Services LLC on 05/12/2026 on NASDAQ.

Rhea-AI Filing Summary

BL filed a Form 144 reporting a proposed sale of 20,000 shares of Common Stock through Fidelity Brokerage Services LLC on 05/12/2026 on NASDAQ. The filing lists prior issuances and exercises, including a 10,000 option exercise on 09/03/2013 and restricted stock vestings of 3,857 on 05/05/2020 and 1,262 on 05/08/2024.

Insights

Securities Counsel

Form 144 notifies a proposed affiliate resale of shares; it is an administrative disclosure.

The filing records a proposed sale of 20,000 shares through Fidelity Brokerage Services LLC as of 05/12/2026. This form is a notice required when affiliates intend to sell restricted or control securities in reliance on Rule 144.

Timing, offering method specifics, and buyer details are not provided in the excerpt; subsequent transaction reports or broker confirmations will show execution details and cash‑flow treatment.

Key Figures

Proposed resale: 20,000 shares Stock option exercise (historical): 10,000 shares Restricted stock vesting: 3,857 shares +1 more

4 metrics

Proposed resale 20,000 shares Form 144 filed with Fidelity Brokerage Services LLC on <date>05/12/2026</date>

Stock option exercise (historical) 10,000 shares Exercise dated <date>09/03/2013</date>

Restricted stock vesting 3,857 shares Vesting dated <date>05/05/2020</date>

Restricted stock vesting 1,262 shares Vesting dated <date>05/08/2024</date>

Key Terms

Form 144, Restricted Stock Vesting, Stock Option Exercise

3 terms

Form 144 regulatory

"filed a Form 144 reporting a proposed sale of 20,000 shares"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Restricted Stock Vesting financial

"Restricted Stock Vesting | Issuer | | | 3857 | 05/05/2020"

Restricted stock vesting is the timetable and conditions under which shares granted to employees or insiders become fully owned and can be sold, typically requiring continued work or meeting performance goals. It matters to investors because large blocks of shares can become tradable at once, which can change share supply and price, and because vesting aligns insiders’ incentives with the company’s long‑term performance—think of it like a timed unlock that both rewards and locks in key people.

Stock Option Exercise financial

"Stock Option Exercise | Issuer | | | 10000 | 09/03/2013"

A stock option exercise is the act of using a previously granted right to buy shares of a company's stock at a specific, predetermined price by paying that price and receiving the shares. It matters to investors because exercising changes who owns the shares (which can dilute existing ownership), can trigger taxable events and shift potential gains or losses, and affects voting power and the company’s outstanding share count—like turning a voucher into an actual product that becomes part of circulating supply.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does BL's Form 144 filing report?

It reports a proposed resale of 20,000 shares of common stock through Fidelity Brokerage Services LLC filed as of 05/12/2026. The form notifies the SEC of an affiliate's intent to sell registered or restricted securities under Rule 144.

Does the Form 144 state when the sale will occur for BL?

The excerpt lists the filing date 05/12/2026 but does not provide an execution date. Form 144 often precedes actual sales; trade execution and settlement details are typically reported in broker records or subsequent filings.

What prior stock events does BL's Form 144 list?

The filing itemizes historical issuances and exercises, including a 10,000 option exercise on 09/03/2013, a restricted stock vesting of 3,857 on 05/05/2020, and a vesting of 1,262 on 05/08/2024. These are presented as background to the resale.

Will BL receive proceeds from the sale listed in Form 144?

The provided excerpt does not state who will receive sale proceeds. Form 144 can cover affiliate sales by holders; cash‑flow treatment is not specified in the visible content and is not determinable from this excerpt.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/12/2026 - 01:51 PM EDT Learn about SEC filing dates

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	0001299455
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	BLACKLINE, INC.
SEC File Number	001-37924
Address of Issuer	21300 VICTORY BOULEVARD 12TH FLOOR WOODLAND HILLS CALIFORNIA 91367
Phone	818-223-9008
Name of Person for Whose Account the Securities are To Be Sold	Unterman Thomas
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	Former Director

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	20000	540002.21	58660917	05/12/2026	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			10000	09/03/2013	Cash
Common	05/05/2020	Restricted Stock Vesting	Issuer			3857	05/05/2020	Compensation
Common	02/22/2022	Stock Option Exercise	Issuer			464	02/22/2022	Cash
Common	03/01/2022	Stock Option Exercise	Issuer			405	03/01/2022	Cash
Common	04/01/2022	Stock Option Exercise	Issuer			465	04/01/2022	Cash
Common	05/02/2022	Stock Option Exercise	Issuer			462	05/02/2022	Cash
Common	06/01/2022	Stock Option Exercise	Issuer			466	06/01/2022	Cash
Common	07/01/2022	Stock Option Exercise	Issuer			462	07/01/2022	Cash
Common	08/01/2022	Stock Option Exercise	Issuer			459	08/01/2022	Cash
Common	09/04/2022	Stock Option Exercise	Issuer			462	09/01/2022	Cash
Common	10/03/2022	Stock Option Exercise	Issuer			458	10/03/2022	Cash
Common	12/01/2022	Stock Option Exercise	Issuer			193	12/01/2022	Cash
Common	01/03/2023	Stock Option Exercise	Issuer			198	01/03/2023	Cash
Common	02/01/2023	Stock Option Exercise	Issuer			211	02/01/2023	Cash
Common	03/01/2023	Stock Option Exercise	Issuer			176	03/01/2023	Cash
Common	05/08/2024	Restricted Stock Vesting	Issuer			1262	05/08/2024	Compensation

* 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

Nothing to Report

144: Remarks and Signature

Remarks	Of today's sale, 10,000 shares were sold in The Etu Rustic Canyon Trust account in which Thomas Unterman is trustee.
Date of Notice	05/12/2026
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	/s/ Daniel Tucci, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Thomas Unterman
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)