Director Jonathan Mariner gets 8,972-share Five9 (FIVN) stock grant

Rhea-AI Filing Summary

MARINER JONATHAN D reported acquisition or exercise transactions in this Form 4 filing.

Five9, Inc. director Jonathan D. Mariner reported a stock-based compensation grant of 8,972 shares of Common Stock, recorded at a price of $0.00 per share. After this non-derivative award, he directly holds a total of 27,147 Five9 common shares.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider MARINER JONATHAN D

Role null

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	8,972	$0.00	--

Holdings After Transaction: Common Stock — 27,147 shares (Direct, null)

Footnotes (1)

Key Figures

Stock grant size: 8,972 shares Grant price per share: $0.00 per share Shares held after grant: 27,147 shares

3 metrics

Stock grant size 8,972 shares Non-derivative Common Stock award (code A)

Grant price per share $0.00 per share Reported transaction price for the award

Shares held after grant 27,147 shares Total direct holdings following the transaction

Key Terms

grant/award acquisition, non-derivative, Common Stock

3 terms

grant/award acquisition financial

"transaction_action: "grant/award acquisition""

non-derivative financial

"transaction_type: "non-derivative" for the Common Stock grant"

Common Stock financial

"security_title: "Common Stock" in the reported transaction"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

Form 4 Insider Transactions: What Each Field Means →

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).

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^*

MARINER JONATHAN D

(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)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/20/2026

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	05/20/2026		A		8,972	A	$0	27,147	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:

Remarks:

	/s/ Tiffany Meriweather, Attorney in Fact	05/22/2026
	** 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)

FAQ

What insider transaction did Five9 (FIVN) director Jonathan Mariner report?

Jonathan D. Mariner reported receiving a grant of 8,972 shares of Five9 Common Stock. The transaction is coded as an award (code A), indicating stock-based compensation rather than an open-market purchase or sale of existing shares.

How many Five9 (FIVN) shares does Jonathan Mariner hold after this Form 4?

Following the grant, Jonathan D. Mariner directly holds 27,147 shares of Five9 Common Stock. This total includes the newly awarded 8,972 shares and reflects his updated direct ownership position reported in the Form 4 filing.

Was cash paid for the Five9 (FIVN) shares granted to Jonathan Mariner?

The reported grant to Jonathan D. Mariner shows a price of $0.00 per share, indicating it was a stock-based compensation award. He did not report paying cash consideration for these 8,972 newly issued Five9 Common Stock shares.

Does the Five9 (FIVN) Form 4 show a stock sale by Jonathan Mariner?

No, the Form 4 reports a grant/award acquisition of 8,972 shares, not a sale. The transaction code is A, which represents a grant, award, or other acquisition, and there are no sale (S) transactions disclosed in this filing.

Is Jonathan Mariner’s Five9 (FIVN) transaction a derivative or non-derivative award?

The reported transaction is classified as non-derivative Common Stock. It reflects a direct stock grant rather than the exercise or conversion of options, warrants, or other derivative securities, and no derivative positions are listed in this Form 4.