John Whittle - 21 May 2026 Form 4 Insider Report for Fortinet, Inc. (FTNT)

Reporting relationship: CHIEF OPERATING OFFICER
Issuer ticker: FTNT
Reported as of: 21 May 2026
Net transaction value: -$18,749,948
SEC form: 4
Accepted by SEC: 22 May 2026, 16:03:07 UTC
Prior SEC filing: 05 May 2026
Source filing: View source filing
Reporting owner signature: /s/ Robert Turner, by power of attorney

Key filing fact

John Whittle filed Form 4 for Fortinet, Inc. (FTNT) on 22 May 2026.

Key facts

This page summarizes John Whittle's Form 4 filing for Fortinet, Inc. (FTNT).
7 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 22 May 2026, 16:03.

Change

Previous filing in this sequence was filed on 05 May 2026.
Current net transaction value: -$18,749,948.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001476336 Primary reporting owner

Whittle John

Relationship: CHIEF OPERATING OFFICER
Address: C/O FORTINET, INC., 909 KIFER ROAD, SUNNYVALE
Signature: /s/ Robert Turner, by power of attorney
Signature date: 22 May 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

FTNT transaction

Common Stock

Options Exercise

Transaction value
Shares: +89,000
Change %: +94%
Price: $34.39^*
Shares after: 183,724
Date: 21 May 2026
Ownership: Direct

FTNT transaction

Common Stock

Options Exercise

Transaction value
Shares: +57,015
Change %: +31%
Price: $22.90^*
Shares after: 240,739
Date: 21 May 2026
Ownership: Direct

FTNT transaction

Common Stock

Sale

Transaction value: $11,125,610
Shares: -86,820
Change %: -36%
Price: $128.15
Shares after: 153,919
Date: 21 May 2026
Ownership: Direct
Footnotes: F1, F2

FTNT transaction

Common Stock

Sale

Transaction value: $7,078,167
Shares: -54,979
Change %: -36%
Price: $128.74
Shares after: 98,940
Date: 21 May 2026
Ownership: Direct
Footnotes: F1, F3

FTNT transaction

Common Stock

Sale

Transaction value: $546,172
Shares: -4,216
Change %: -4.3%
Price: $129.55
Shares after: 94,724
Date: 21 May 2026
Ownership: Direct
Footnotes: F1, F4

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

FTNT transaction Derivative

Stock Option (right to buy)

Options Exercise

Transaction value
Shares: -89,000
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 21 May 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 89,000
Exercise price: $34.39
Footnotes: F5

FTNT transaction Derivative

Stock Option (right to buy)

Options Exercise

Transaction value
Shares: -57,015
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 21 May 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 57,015
Exercise price: $22.90
Footnotes: F5

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 5 footnotes

Footnote F1

The sales reported in this line item were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 19, 2026.

Footnote F2

Represents the weighted average sale price. The lowest price at which shares were sold was $127.48 and the highest price at which shares were sold was $128.47. 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.

Footnote F3

Represents the weighted average sale price. The lowest price at which shares were sold was $128.48 and the highest price at which shares were sold was $129.46. 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.

Footnote F4

Represents the weighted average sale price. The lowest price at which shares were sold was $129.48 and the highest price at which shares were sold was $129.71. 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.

Footnote F5

The options are fully vested.