Fortinet COO sells 56,700 shares after exercise

Fortinet’s chief operating officer exercised fully vested options and sold 56,700 common shares in mid-September 2026 under a pre-arranged Rule 10b5-1 trading plan.

Rhea-AI Filing Summary

Fortinet, Inc. (FTNT) reported that chief operating officer John Whittle exercised stock options and sold the resulting shares. On September 14 and 15, 2026, he exercised options for 56,700 shares of common stock at an exercise price of $62.11 per share; the options were fully vested. The same 56,700 shares were then sold in market or private transactions at prices around $165–$169 per share pursuant to a Rule 10b5-1 trading plan adopted on June 5, 2026.

Insider Trade Summary 10b5-1

Exercise and Sale: 56,700 shares ($5.87M approx. pre-tax spread)

Exercise and Sale 7 txns

Insider Whittle John

Role CHIEF OPERATING OFFICER

Sold 56,700 shs ($9.39M)

Approx. gross sale proceeds $9.39M

Approx. exercise cost $3.52M

Approx. pre-tax spread $5.87M

Type	Security	Shares	Price	Value
Exercise	Stock Option (right to buy) F4	2,835	$0.00	$0.00
Exercise	Common Stock	2,835	$62.11	$176K
Sale	Common Stock F1	2,835	$168.74	$478K
Exercise	Stock Option (right to buy) F4	53,865	$0.00	$0.00
Exercise	Common Stock	53,865	$62.11	$3.35M
Sale	Common Stock F1, F2	52,707	$165.4274	$8.72M
Sale	Common Stock F1, F3	1,158	$166.0175	$192K

Holdings After Transaction: Stock Option (right to buy) — 0 contracts (Direct); Common Stock — 96,987 shares (Direct)

Footnotes (4)

1. F1. The sales reported in this line item were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 5, 2026.
2. F2. Represents the weighted average sale price. The lowest price at which shares were sold was $165.00 and the highest price at which shares were sold was $165.96. The Reporting Person undertakes to provide upon request to the staff of the Securities and Exchange Commission, the Issuer or its stockholders, full information regarding the total number of shares sold at each separate price within the range set forth herein.
3. F3. Represents the weighted average sale price. The lowest price at which shares were sold was $166.00 and the highest price at which shares were sold was $166.04. The Reporting Person undertakes to provide upon request to the staff of the Securities and Exchange Commission, the Issuer or its stockholders, full information regarding the total number of shares sold at each separate price within the range set forth herein.
4. F4. The options are fully vested.

Key Figures

Shares sold: 56,700 shares Option exercise price: $62.11 per share Single reported sale price: $168.74 per share +5 more

8 metrics

Shares sold 56,700 shares Total Fortinet common shares sold by the chief operating officer on September 14–15, 2026

Option exercise price $62.11 per share Exercise price for 56,700 options converted into Fortinet common stock

Single reported sale price $168.74 per share Price for a sale of 2,835 Fortinet common shares on September 15, 2026

Weighted average sale price range 1 $165.4274 per share; $165.00–$165.96 Weighted average and range for sales of 52,707 shares on September 14, 2026

Weighted average sale price range 2 $166.0175 per share; $166.00–$166.04 Weighted average and range for sales of 1,158 shares on September 14, 2026

Options exercised on September 14, 2026 53,865 shares Number of underlying shares from options exercised into common stock on that date

Options exercised on September 15, 2026 2,835 shares Number of underlying shares from options exercised into common stock on that date

Option expiration date February 17, 2029 Scheduled expiration for the exercised Fortinet stock options

Key Terms

Rule 10b5-1 trading plan, weighted average sale price, fully vested, Common Stock

4 terms

Rule 10b5-1 trading plan regulatory

"The sales reported in this line item were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 5, 2026."

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 sale price financial

"Represents the weighted average sale price."

fully vested financial

"The options are fully vested."

Common Stock financial

"underlying security title: Common Stock"

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.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did FTNT report for COO John Whittle?

Fortinet reported that chief operating officer John Whittle exercised options for 56,700 shares of common stock at $62.11 per share and sold the same number of shares in market or private transactions on September 14 and 15, 2026.

How many Fortinet (FTNT) shares did the COO sell and at what prices?

John Whittle sold a total of 56,700 shares of Fortinet common stock. Reported sale prices included $168.74 per share and weighted average sale prices of $165.4274 and $166.0175 per share, with individual trades ranging from $165.00–$166.04.

What was the option exercise price in the recent FTNT Form 4 filing?

The options exercised by Fortinet’s chief operating officer had an exercise price of $62.11 per share and were exercised for a total of 56,700 underlying shares of common stock on September 14 and 15, 2026.

Were the FTNT insider sales made under a Rule 10b5-1 trading plan?

Yes. A footnote states the reported sales were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026, indicating the trades were made under a pre-arranged plan.

Were the options in the FTNT Form 4 fully vested at exercise?

Yes. A footnote explains that the options exercised for 56,700 shares of Fortinet common stock were fully vested at the time of exercise, with the options scheduled to expire on February 17, 2029.

What is the expiration date of the exercised Fortinet stock options?

The stock options exercised by Fortinet’s chief operating officer on September 14 and 15, 2026 were scheduled to expire on February 17, 2029, according to the Form 4 disclosure and related footnotes.

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

Form 4 Insider Transactions: What Each Field Means →

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Available on EDGAR 09/16/2026 - 04:23 PM Accepted by SEC EDGAR 09/16/2026 - 04:22 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^*

Whittle John

(Last) (First) (Middle)

C/O FORTINET, INC.

909 KIFER ROAD

(Street)

SUNNYVALE CALIFORNIA 94086

(City) (State) (Zip)

UNITED STATES

(Country)

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

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/14/2026

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	09/14/2026		M		53,865	A	$62.11	150,852	D
Common Stock	09/14/2026		S(1)		52,707	D	$165.4274(2)	98,145	D
Common Stock	09/14/2026		S(1)		1,158	D	$166.0175(3)	96,987	D
Common Stock	09/15/2026		M		2,835	A	$62.11	99,822	D
Common Stock	09/15/2026		S(1)		2,835	D	$168.74	96,987	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
Stock Option (right to buy)	$62.11	09/14/2026		M			53,865	(4)	02/17/2029	Common Stock	53,865	$0	2,835	D
Stock Option (right to buy)	$62.11	09/15/2026		M			2,835	(4)	02/17/2029	Common Stock	2,835	$0	0	D

Explanation of Responses:

1. The sales reported in this line item were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 5, 2026.

2. Represents the weighted average sale price. The lowest price at which shares were sold was $165.00 and the highest price at which shares were sold was $165.96. The Reporting Person undertakes to provide upon request to the staff of the Securities and Exchange Commission, the Issuer or its stockholders, full information regarding the total number of shares sold at each separate price within the range set forth herein.

3. Represents the weighted average sale price. The lowest price at which shares were sold was $166.00 and the highest price at which shares were sold was $166.04. The Reporting Person undertakes to provide upon request to the staff of the Securities and Exchange Commission, the Issuer or its stockholders, full information regarding the total number of shares sold at each separate price within the range set forth herein.

4. The options are fully vested.

	/s/ Robert Turner, by power of attorney	09/16/2026
	** 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)