BL insider sales: Two 10,000-share dispositions

BL reported insider sales via Form 144 showing two dispositions of Common Stock on 05/12/2026.

Rhea-AI Filing Summary

BL reported insider sales via Form 144 showing two dispositions of Common Stock on 05/12/2026. Thomas Unterman sold 10,000 shares for $269,450.09 and The Etu Rustic Canyon Trust sold 10,000 shares for $270,552.12.

Insights

Corporate Governance Analyst

Two related-party dispositions of common stock were reported on 05/12/2026.

The filing lists two separate sales: 10,000 shares by Thomas Unterman and 10,000 shares by The Etu Rustic Canyon Trust, with proceeds shown as $269,450.09 and $270,552.12, respectively. The transactions are recorded as completed on 05/12/2026.

Cashflow recipients and any holding-period or Rule 144 qualifiers are not stated in the excerpt; subsequent filings or broker confirmations would provide further context if needed.

Key Figures

Sale by Thomas Unterman: 10,000 shares Sale by The Etu Rustic Canyon Trust: 10,000 shares Broker/Holder line item: 20,000 (listed)

3 metrics

Sale by Thomas Unterman 10,000 shares sold on 05/12/2026 for <money>$269,450.09</money>

Sale by The Etu Rustic Canyon Trust 10,000 shares sold on 05/12/2026 for <money>$270,552.12</money>

Broker/Holder line item 20,000 (listed) Securities Information row shows <b>20000</b> adjacent to broker Fidelity entry dated 05/13/2026

Key Terms

Restricted Stock Vesting, Stock Option Exercise, Form 144

3 terms

Restricted Stock Vesting financial

"05/06/2026 | Restricted Stock Vesting | Issuer | | | 2316 | 05/06/2026"

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

"09/03/2013 | 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.

Form 144 regulatory

"144: Securities Sold During The Past 3 Months"

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.

FAQ

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

What insider sales did BL report on Form 144?

BL reported two insider dispositions on 05/12/2026. Thomas Unterman sold 10,000 shares for $269,450.09, and The Etu Rustic Canyon Trust sold 10,000 shares for $270,552.12.

Who were the sellers listed in the BL Form 144 filing?

The sellers named are Thomas Unterman and The Etu Rustic Canyon Trust, each with an address at 21300 Victory Boulevard, Woodland Hills, CA. Each entity is reported to have sold 10,000 shares on 05/12/2026.

How much gross proceeds were reported for each BL sale?

The filing shows proceeds of $269,450.09 for Thomas Unterman's 10,000-share sale and $270,552.12 for The Etu Rustic Canyon Trust's 10,000-share sale, both dated 05/12/2026.

Do the BL Form 144 entries list the transaction method or restrictions?

The excerpt lists sale dates and amounts but does not specify the method of sale, broker instructions, or any Rule 144 holding-period statements. The filing items shown are limited to security type, dates, share counts, and proceeds.

Are prior grants or issuances visible in the BL excerpt?

Yes. The excerpt lists historical equity events including stock option exercises and restricted stock vesting on specific dates (for example, vesting events on 05/06/2026 for 2,316 shares), but these are itemized separately from the reported sales.

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

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Accepted by SEC EDGAR 05/13/2026 - 11:40 AM 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	508040.23	58660917	05/13/2026	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	05/11/2022	Restricted Stock Vesting	Issuer			402	05/11/2022	Compensation
Common	10/03/2022	Stock Option Exercise	Issuer			198	10/03/2022	Cash
Common	11/01/2022	Stock Option Exercise	Issuer			296	11/01/2022	Cash
Common	05/09/2023	Restricted Stock Vesting	Issuer			3401	05/09/2023	Compensation
Common	05/08/2024	Restricted Stock Vesting	Issuer			3387	05/08/2024	Compensation
Common	05/06/2026	Restricted Stock Vesting	Issuer			2316	05/06/2026	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

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Thomas Unterman 21300 Victory Boulevard 12th Floor Woodland Hills CA 91367	Common	05/12/2026	10000	269450.09
The Etu Rustic Canyon Trust 21300 Victory Boulevard 12th Floor Woodland Hills CA 91367	Common	05/12/2026	10000	270552.12

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	05/13/2026
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/ Joshua Schmitt, 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)