[Form 4] Fortinet, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Fortinet insider Hsieh Ming, a director, reported the vesting and receipt of 649 restricted stock units (RSUs) on 09/30/2025, which converted into 649 shares of Fortinet common stock at a $0 purchase price per the Form 4. After this transaction the reporting person beneficially owns 60,736 shares directly.

The filing states the RSUs were granted on 08/20/2025 and vest in substantially equal increments on 09/30/2025, 12/31/2025, 03/31/2026, and the earlier of 06/30/2026 or the date before the 2026 annual meeting, subject to continued service. The RSUs represent a contingent right to one share each and do not expire; shares will be delivered following each vesting event.

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

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

1. Name and Address of Reporting Person^*

Hsieh Ming

(Last) (First) (Middle)

C/O FORTINET, INC.

909 KIFER ROAD

(Street)

SUNNYVALE CA 94086

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Fortinet, Inc. [ FTNT ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
09/30/2025

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

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

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

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	09/30/2025		M(1)		649	A	$0	60,736	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
Restricted Stock Units	$0(2)	09/30/2025		M(1)			649	(3)	(4)	Common Stock	649	$0	1,948	D

Explanation of Responses:

1. Vesting of restricted stock units ("RSUs") granted to the Reporting Person on August 20, 2025.

2. Each RSU represents a contingent right to receive one share of the Issuer's common stock upon settlement.

3. The RSUs will vest in substantially equal increments on each of September 30, 2025, December 31, 2025, March 31, 2026, and the earlier of (i) June 30, 2026 and (ii) the date immediately preceding the Issuer's 2026 annual meeting of stockholders, subject to the Reporting Person's provision of services to the Issuer on each vesting date. Shares of the Issuer's Common Stock will be delivered to the Reporting Person following vesting.

4. RSUs do not expire; they either vest or are canceled prior to vest date

	/s/ Robert Turner, by power of attorney	10/02/2025
	** 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.
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FAQ

What did Fortinet insider Hsieh Ming report on Form 4 (FTNT)?

The Form 4 reports the vesting and conversion of 649 RSUs into 649 shares of Fortinet common stock on 09/30/2025.

How many Fortinet shares does Hsieh Ming own after the transaction?

Following the reported transaction, Hsieh Ming beneficially owns 60,736 shares of Fortinet common stock.

When were the RSUs granted and what are the remaining vesting dates?

The RSUs were granted on 08/20/2025 and vest in equal increments on 09/30/2025, 12/31/2025, 03/31/2026, and the earlier of 06/30/2026 or the date before the 2026 annual meeting.

Did Hsieh Ming pay for the shares received from RSU vesting?

No. The Form 4 shows a $0 price per share for the shares delivered upon RSU settlement.

Do the RSUs have an expiration date?

The filing states RSUs do not expire; they either vest or are canceled prior to the vesting date.