BlackLine affiliate plans sale of 70,000 shares

Rhea-AI Filing Summary

BLACKLINE, INC. (BL) reported that an affiliated individual, for whose account securities are held at Fidelity Brokerage Services LLC, has filed a notice of intent under Rule 144 to sell 70,000 shares of common stock. The shares relate to a stock option exercise for cash, with an approximate sale date of August 24, 2026 on NASDAQ.

Key Figures

Shares to be sold: 70,000 shares of common stock Aggregate market value: $2,236,957.08 Shares outstanding: 58,125,270 shares +1 more

4 metrics

Shares to be sold 70,000 shares of common stock Number of BLACKLINE, INC. shares covered by the Rule 144 notice

Aggregate market value $2,236,957.08 Aggregate market value of the 70,000 BLACKLINE, INC. shares to be sold

Shares outstanding 58,125,270 shares BLACKLINE, INC. shares outstanding referenced in the Form 144

Approximate sale date 08/24/2026 Approximate date of proposed sale of BLACKLINE, INC. shares

Key Terms

Rule 144, aggregate market value, stock option exercise

3 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

aggregate market value financial

"Common | Fidelity Brokerage Services LLC ... 70000 | 2236957.08"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

stock option exercise financial

"Common | 08/24/2026 | Stock Option Exercise | Issuer"

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 this Form 144 filing mean for BLACKLINE, INC. (BL)?

A person associated with BLACKLINE, INC. filed a Rule 144 notice indicating an intent to sell 70,000 shares of common stock through Fidelity Brokerage Services LLC. This is a disclosure of a potential sale, not a confirmation that the sale has occurred.

How many BLACKLINE, INC. (BL) shares are planned to be sold under this Form 144?

The filing states an intent to sell 70,000 shares of BLACKLINE, INC. common stock. These shares are to be sold through Fidelity Brokerage Services LLC on or about August 24, 2026.

What is the aggregate market value of the BLACKLINE, INC. (BL) shares covered by this Form 144?

The Form 144 lists an aggregate market value of approximately $2,236,957.08 for the 70,000 shares of BLACKLINE, INC. common stock proposed to be sold.

How many BLACKLINE, INC. (BL) shares are outstanding as referenced in the Form 144?

The notice references 58,125,270 shares outstanding of BLACKLINE, INC. common stock in connection with the proposed Rule 144 sale of 70,000 shares.

How and when were the BLACKLINE, INC. (BL) shares to be sold under this Form 144 acquired?

The securities to be sold are shown as acquired on August 24, 2026 through a stock option exercise from the issuer, with the nature of payment listed as cash.

On which market will the BLACKLINE, INC. (BL) shares under this Form 144 be sold?

The filing indicates that the 70,000 shares of BLACKLINE, INC. common stock are expected to be sold on NASDAQ through Fidelity Brokerage Services LLC.

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

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Available on EDGAR 08/24/2026 - 04:26 PM EDT Accepted by SEC EDGAR 08/24/2026 - 04:26 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	0001688365
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	Tucker Therese
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	Officer
Relationship to Issuer	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	70000	2236957.08	58125270	08/24/2026	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	08/24/2026	Stock Option Exercise	Issuer			70000	08/24/2026	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

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	08/24/2026
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 Nancy T. Tucker.
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)