Five9 legal chief sells 18,523 shares in plan

Five9’s Chief Admin. & Legal Officer reported pre‑planned sales of 18,523 shares, largely tied to RSU tax obligations.

Rhea-AI Filing Summary

Five9, Inc. (FIVN) reported that Chief Admin. & Legal Officer Tiffany N. Meriweather sold a total of 18,523 shares of common stock in three open‑market transactions in early September 2026 under a Rule 10b5-1 trading plan adopted on May 21, 2026.

The sales on September 4, 2026, totaling 13,409 shares at weighted average prices of $33.02 and $33.51, were disclosed as to cover taxes upon the vesting of restricted stock units. An additional 5,114 shares were sold on September 8, 2026 at a weighted average price of $31.55, all from direct holdings.

Insider Trade Summary 10b5-1

Net Seller: 18,523 shares

Net Sell 3 txns

Insider Meriweather Tiffany N.

Role Chief Admin. & Legal Officer

Sold 18,523 shs ($608K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1, F5	5,114	$31.55	$161K
Sale	Common Stock F1, F2, F3	5,600	$33.02	$185K
Sale	Common Stock F1, F2, F4	7,809	$33.51	$262K

Holdings After Transaction: Common Stock — 253,249 shares (Direct)

Footnotes (5)

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 May 21, 2026.
2. F2. The reported sales were to cover taxes upon the vesting of restricted stock units.
3. F3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $32.35 to $33.35, 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.
4. F4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $33.36 to $33.77, 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.
5. F5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $31.12 to $31.97, 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

Total shares sold: 18,523 shares Shares sold to cover RSU taxes: 13,409 shares Weighted average sale price (Sept. 4, 2026 block 1): $33.02 per share +4 more

7 metrics

Total shares sold 18,523 shares Common stock sales reported for September 4 and 8, 2026

Shares sold to cover RSU taxes 13,409 shares Sales on September 4, 2026 disclosed as to cover taxes on RSU vesting

Weighted average sale price (Sept. 4, 2026 block 1) $33.02 per share Sale of 5,600 shares of common stock

Weighted average sale price (Sept. 4, 2026 block 2) $33.51 per share Sale of 7,809 shares of common stock

Weighted average sale price (Sept. 8, 2026) $31.55 per share Sale of 5,114 shares of common stock

Price ranges for Sept. 4 sales $32.35–$33.77 per share Multiple transactions within these ranges per weighted-average footnotes

Price range for Sept. 8 sale $31.12–$31.97 per share Multiple transactions within this range per weighted-average footnote

Key Terms

Rule 10b5-1 trading plan, restricted stock units, weighted average price

3 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.

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.

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.

FAQ

What insider transactions did Five9 (FIVN) disclose for Tiffany N. Meriweather?

Five9 disclosed that Tiffany N. Meriweather sold 18,523 shares of common stock in three open‑market transactions on September 4 and 8, 2026, all from direct ownership, according to the Form 4.

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

Yes. The filing states the sales were effected pursuant to a Rule 10b5-1 trading plan adopted by Tiffany N. Meriweather on May 21, 2026, indicating the transactions were pre‑scheduled.

How many Five9 (FIVN) shares were sold to cover RSU taxes?

On September 4, 2026, Meriweather sold a total of 13,409 shares of Five9 common stock, and the filing explains these sales were to cover taxes upon the vesting of restricted stock units.

What prices were reported for the recent Five9 (FIVN) insider stock sales?

The Form 4 reports weighted average prices: $33.02 and $33.51 on September 4, 2026, and $31.55 on September 8, 2026. Footnotes note actual trades occurred in ranges from $31.12 to $33.77.

Does the Five9 (FIVN) Form 4 show remaining holdings for Tiffany N. Meriweather?

No. The Form 4 lists the shares sold but leaves the “shares following transaction” fields blank, so it does not state her post‑transaction Five9 share balance.

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

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Available on EDGAR 09/09/2026 - 04:16 PM Accepted by SEC EDGAR 09/09/2026 - 04:15 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^*

Meriweather Tiffany N.

(Last) (First) (Middle)

C/O FIVE9, INC.

3001 BISHOP DRIVE, SUITE 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)
	Chief Admin. & Legal Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/04/2026

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	09/04/2026		S		5,600(1)(2)	D	$33.02(3)	266,172	D
Common Stock	09/04/2026		S		7,809(1)(2)	D	$33.51(4)	258,363	D
Common Stock	09/08/2026		S		5,114(1)	D	$31.55(5)	253,249	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 May 21, 2026.

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

3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $32.35 to $33.35, 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.

4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $33.36 to $33.77, 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.

5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $31.12 to $31.97, 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/ Leena Mansharamani, Attorney in Fact	09/09/2026
	** 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)