Five9 officer plans $457K Rule 144 stock sale

Five9, Inc. (FIVN) received a Rule 144 notice from officer Tiffany Meriweather for a planned sale of up to 13,409 shares of Five9 common stock through Morgan Stanley Smith Barney LLC on or about September 4, 2026 on NASDAQ.

Rhea-AI Filing Summary

Five9, Inc. (FIVN) received a Rule 144 notice from officer Tiffany Meriweather for a planned sale of up to 13,409 shares of Five9 common stock through Morgan Stanley Smith Barney LLC on or about September 4, 2026 on NASDAQ.

The shares derive from Restricted Stock Units acquired from the issuer on September 3, 2026, with an aggregate market value listed at approximately $457,246.90. Five9 reports 74,723,531 shares of common stock outstanding, a baseline figure separate from the amount covered by this notice.

Key Figures

Shares to be sold: 13,409 shares Aggregate market value of shares to be sold: $457,246.90 Planned sale date: September 4, 2026 +2 more

5 metrics

Shares to be sold 13,409 shares Planned sale of Five9 common stock under Rule 144

Aggregate market value of shares to be sold $457,246.90 Value for 13,409 Five9 shares listed in the notice

Planned sale date September 4, 2026 Date listed for sale of 13,409 Five9 shares

Acquisition date of RSU shares September 3, 2026 Date Restricted Stock Units were acquired from Five9

Shares outstanding 74,723,531 shares Five9 common stock outstanding, separate from shares to be sold

Key Terms

Rule 144, Restricted Stock Units, aggregate market value, Securities To Be Sold

4 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.

Restricted Stock Units financial

"Common | 09/03/2026 | Restricted Stock Units | Issuer"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

aggregate market value financial

"13409 | 457246.90 | 74723531 | 09/04/2026 | NASDAQ"

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.

Securities To Be Sold financial

"144: Securities To Be Sold Common | 09/03/2026"

FAQ

What insider transaction is disclosed for FIVN in this Form 144?

Officer Tiffany Meriweather filed a Rule 144 notice for the planned sale of up to 13,409 shares of Five9, Inc. (FIVN) common stock through Morgan Stanley Smith Barney LLC on or about September 4, 2026.

How many Five9 (FIVN) shares are planned to be sold and at what value?

The filing lists up to 13,409 shares of Five9 common stock to be sold, with an aggregate market value of approximately $457,246.90 as presented in the notice.

What is the source of the Five9 (FIVN) shares being sold under Rule 144?

The shares come from Restricted Stock Units acquired from Five9, Inc. on September 3, 2026, as stated in the securities acquisition details in the notice.

On which exchange will the Five9 (FIVN) shares be sold according to the Form 144?

The notice indicates that the 13,409 shares of Five9 common stock are expected to be sold on the NASDAQ market, with Morgan Stanley Smith Barney LLC listed as the broker.

How many Five9 (FIVN) shares are reported as outstanding in this filing?

The Form 144 reports that 74,723,531 shares of Five9 common stock are outstanding, which serves as a baseline figure separate from the 13,409 shares covered by the planned sale.

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

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Available on EDGAR 09/04/2026 - 04:38 PM Accepted by SEC EDGAR 09/04/2026 - 04:38 PM 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	0001886762
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	FIVE9 INC COM
SEC File Number	001-36383
Address of Issuer	3001 Bishop Drive, Suite 350 San Ramon CALIFORNIA 94583
Phone	9252012000
Name of Person for Whose Account the Securities are To Be Sold	TIFFANY MERIWEATHER
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

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	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	13409	457246.90	74723531	09/04/2026	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	09/03/2026	Restricted Stock Units	Issuer			13409	09/03/2026	N/A

* 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	09/04/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	05/21/2026
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/ Tiffany Meriweather
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)