Five9 CAO sells 6,617 shares under 10b5-1 plan

Five9’s chief accounting officer reported pre-planned open-market sales totaling 6,617 shares in early September 2026, partly for tax withholding on RSU vesting.

Rhea-AI Filing Summary

Five9, Inc. (FIVN) disclosed that Leena Mansharamani, SVP and Chief Accounting Officer, sold a total of 6,617 shares of common stock in multiple open-market transactions from September 3 to September 8, 2026, at prices around $31.53–$35.05 per share. All reported sales were effected under a Rule 10b5-1 trading plan adopted on June 4, 2026, and a portion of the September 4, 2026 sales was made to cover taxes upon the vesting of restricted stock units.

Insider Trade Summary 10b5-1

Net Seller: 6,617 shares

Net Sell 5 txns

Insider Mansharamani Leena

Role SVP, Chief Accounting Officer

Sold 6,617 shs ($221K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1, F7	1,253	$31.53	$40K
Sale	Common Stock F1, F4, F5	2,505	$33.32	$83K
Sale	Common Stock F1, F4, F6	201	$33.71	$7K
Sale	Common Stock F1, F2, F3	2,558	$34.19	$87K
Sale	Common Stock F1	100	$35.05	$4K

Holdings After Transaction: Common Stock — 52,417 shares (Direct)

Footnotes (7)

1. F1. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 4, 2026.
2. F2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $33.98 to $34.57, inclusive. The reporting person undertakes to provide Five9, Inc., any security holder of Five9, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.
3. F3. Includes 1,336 shares acquired under the Five9, Inc. Employee Stock Purchase Plan on May 15, 2026.
4. F4. The reported sales were to cover taxes upon the vesting of restricted stock units.
5. F5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $32.65 to $33.65, inclusive. The reporting person undertakes to provide Five9, Inc., any security holder of Five9, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.
6. F6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $33.69 to $33.75, inclusive. The reporting person undertakes to provide Five9, Inc., any security holder of Five9, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.
7. F7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $31.17 to $31.92, inclusive. The reporting person undertakes to provide Five9, Inc., any security holder of Five9, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

Key Figures

Shares sold: 6,617 shares Sale price September 8, 2026: $31.53 per share Sale prices September 3, 2026: $34.19 and $35.05 per share +3 more

6 metrics

Shares sold 6,617 shares Total non-derivative common shares sold by the insider during September 3–8, 2026

Sale price September 8, 2026 $31.53 per share Sale of 1,253 shares of common stock on September 8, 2026

Sale prices September 3, 2026 $34.19 and $35.05 per share Sales of 2,558 and 100 shares of common stock on September 3, 2026

Sale prices September 4, 2026 $33.32 and $33.71 per share Sales of 2,505 and 201 shares of common stock on September 4, 2026

ESPP shares included 1,336 shares Common shares acquired under the Five9 Employee Stock Purchase Plan on May 15, 2026

10b5-1 plan adoption date June 4, 2026 Rule 10b5-1 trading plan under which the reported sales were effected

Key Terms

Rule 10b5-1 trading plan, weighted average price, Employee Stock Purchase Plan, restricted stock units

4 terms

Rule 10b5-1 trading plan regulatory

"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

weighted average price financial

"The price reported in Column 4 is a weighted average price"

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

Employee Stock Purchase Plan financial

"Includes 1,336 shares acquired under the Five9, Inc. Employee Stock Purchase Plan"

An employee stock purchase plan is a company program that lets workers buy shares through small payroll deductions, often at a discount to the market price and after a set offering period. Think of it like a workplace savings plan that turns into ownership: it encourages employees to share in the company’s success and can create predictable buying or selling of stock that investors watch because it affects supply, demand and employee incentives.

restricted stock units financial

"The reported sales were to cover taxes upon the vesting of restricted stock units"

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.

FAQ

What did Five9 (FIVN) disclose about insider transactions in this Form 4?

Five9 reported that SVP and Chief Accounting Officer Leena Mansharamani sold 6,617 shares of common stock in open-market transactions between September 3 and 8, 2026, at prices around $31.53–$35.05 per share, under a Rule 10b5-1 trading plan.

How many Five9 (FIVN) shares did Leena Mansharamani sell and over what dates?

Leena Mansharamani sold a total of 6,617 shares of Five9 common stock, in five transactions on September 3, 4, and 8, 2026, as reported in the Form 4 transaction summary.

Were the Five9 (FIVN) insider sales made under a Rule 10b5-1 plan?

Yes. A footnote states that all sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 4, 2026.

What were the reported sale prices for the Five9 (FIVN) insider transactions?

Reported prices per share were $34.19 and $35.05 on September 3, $33.32 and $33.71 on September 4, and $31.53 on September 8, 2026. Several prices are disclosed as weighted average prices over specified trading ranges.

Were any of the Five9 (FIVN) insider share sales related to tax withholding?

Yes. A footnote explains that the September 4, 2026 sales were made to cover taxes upon the vesting of restricted stock units, indicating those sales were tied to tax obligations on equity compensation.

Does the Form 4 mention Five9 (FIVN) shares acquired through an employee plan?

Yes. A footnote notes that the reporting person’s holdings include 1,336 shares acquired under the Five9, Inc. Employee Stock Purchase Plan on May 15, 2026.

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Available on EDGAR 09/08/2026 - 07:07 PM Accepted by SEC EDGAR 09/08/2026 - 07:06 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Mansharamani Leena

(Last) (First) (Middle)

C/O FIVE9, INC.

3001 BISHOP DR., STE. #350

(Street)

SAN RAMON CALIFORNIA 94583

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Five9, Inc. [ FIVN ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP, Chief Accounting Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/03/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	09/03/2026		S		2,558(1)	D	$34.19(2)	56,476(3)	D
Common Stock	09/03/2026		S		100(1)	D	$35.05	56,376	D
Common Stock	09/04/2026		S		2,505(1)(4)	D	$33.32(5)	53,871	D
Common Stock	09/04/2026		S		201(1)(4)	D	$33.71(6)	53,670	D
Common Stock	09/08/2026		S		1,253(1)	D	$31.53(7)	52,417	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 4, 2026.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $33.98 to $34.57, inclusive. The reporting person undertakes to provide Five9, Inc., any security holder of Five9, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

3. Includes 1,336 shares acquired under the Five9, Inc. Employee Stock Purchase Plan on May 15, 2026.

4. The reported sales were to cover taxes upon the vesting of restricted stock units.

5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $32.65 to $33.65, inclusive. The reporting person undertakes to provide Five9, Inc., any security holder of Five9, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $33.69 to $33.75, inclusive. The reporting person undertakes to provide Five9, Inc., any security holder of Five9, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $31.17 to $31.92, inclusive. The reporting person undertakes to provide Five9, Inc., any security holder of Five9, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

Remarks:

	/s/ Tiffany Meriweather, Attorney in Fact	09/08/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)