FTNT: Whittle John discloses securities transactions

By AlphaYouPublished Sep 23, 2026Form 4

Stocks in this disclosure

Reported activity

Whittle John

Reporting filer

Whittle John reported Exercise or conversion in Fortinet, Inc.: 53865 units of Common Stock, dated 2026-09-14. The full Form 4 contains 7 transaction entries.

Disclosed: Sep 16, 2026

Reported details

7 entries

All validated entries in this disclosure
Security	Owner	Date	Code	Action	Quantity	Price	Following holdings	Reporting delay	Filed terms and references
Common Stock	Whittle John	2026-09-14	M	Exercise or conversion	53865	62.11	150,852	2 days	Filed terms security Title: Common Stock transaction Date: 2026-09-14 transaction Form Type: 4 transaction Code: M equity Swap Involved: 0 transaction Shares: 53865 transaction Price Per Share: 62.11 transaction Acquired Disposed Code: A shares Owned Following Transaction: 150852 direct Or Indirect Ownership: D nature Of Ownership:
Common Stock	Whittle John	2026-09-14	S	Sale	52707	165.4274	98,145	2 days	Filed terms security Title: Common Stock transaction Date: 2026-09-14 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 id: F1 transaction Shares: 52707 transaction Price Per Share: 165.4274 id: F2 transaction Acquired Disposed Code: D shares Owned Following Transaction: 98145 direct Or Indirect Ownership: D nature Of Ownership:
Common Stock	Whittle John	2026-09-14	S	Sale	1158	166.0175	96,987	2 days	Filed terms security Title: Common Stock transaction Date: 2026-09-14 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 id: F1 transaction Shares: 1158 transaction Price Per Share: 166.0175 id: F3 transaction Acquired Disposed Code: D shares Owned Following Transaction: 96987 direct Or Indirect Ownership: D nature Of Ownership:
Common Stock	Whittle John	2026-09-15	M	Exercise or conversion	2835	62.11	99,822	1 day	Filed terms security Title: Common Stock transaction Date: 2026-09-15 transaction Form Type: 4 transaction Code: M equity Swap Involved: 0 transaction Shares: 2835 transaction Price Per Share: 62.11 transaction Acquired Disposed Code: A shares Owned Following Transaction: 99822 direct Or Indirect Ownership: D nature Of Ownership:
Common Stock	Whittle John	2026-09-15	S	Sale	2835	168.74	96,987	1 day	Filed terms security Title: Common Stock transaction Date: 2026-09-15 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 id: F1 transaction Shares: 2835 transaction Price Per Share: 168.74 transaction Acquired Disposed Code: D shares Owned Following Transaction: 96987 direct Or Indirect Ownership: D nature Of Ownership:
Stock Option (right to buy) (derivative)	Whittle John	2026-09-14	M	Exercise or conversion	53865	0	2,835	2 days	Filed terms security Title: Stock Option (right to buy) conversion Or Exercise Price: 62.11 transaction Date: 2026-09-14 transaction Form Type: 4 transaction Code: M equity Swap Involved: 0 transaction Shares: 53865 transaction Price Per Share: 0 transaction Acquired Disposed Code: D id: F4 expiration Date: 2029-02-17 underlying Security Title: Common Stock underlying Security Shares: 53865 shares Owned Following Transaction: 2835 direct Or Indirect Ownership: D nature Of Ownership:
Stock Option (right to buy) (derivative)	Whittle John	2026-09-15	M	Exercise or conversion	2835	0	0	1 day	Filed terms security Title: Stock Option (right to buy) conversion Or Exercise Price: 62.11 transaction Date: 2026-09-15 transaction Form Type: 4 transaction Code: M equity Swap Involved: 0 transaction Shares: 2835 transaction Price Per Share: 0 transaction Acquired Disposed Code: D id: F4 expiration Date: 2029-02-17 underlying Security Title: Common Stock underlying Security Shares: 2835 shares Owned Following Transaction: 0 direct Or Indirect Ownership: D nature Of Ownership:

Common Stock

Owner: Whittle John
Date: 2026-09-14
Code: M
Action: Exercise or conversion
Quantity: 53865
Price: 62.11
Following holdings: 150,852
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-09-14
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Shares: 53865
transaction Price Per Share: 62.11
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 150852
direct Or Indirect Ownership: D
nature Of Ownership:

Common Stock

Owner: Whittle John
Date: 2026-09-14
Code: S
Action: Sale
Quantity: 52707
Price: 165.4274
Following holdings: 98,145
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-09-14
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 52707
transaction Price Per Share: 165.4274
id: F2
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 98145
direct Or Indirect Ownership: D
nature Of Ownership:

Common Stock

Owner: Whittle John
Date: 2026-09-14
Code: S
Action: Sale
Quantity: 1158
Price: 166.0175
Following holdings: 96,987
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-09-14
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 1158
transaction Price Per Share: 166.0175
id: F3
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 96987
direct Or Indirect Ownership: D
nature Of Ownership:

Common Stock

Owner: Whittle John
Date: 2026-09-15
Code: M
Action: Exercise or conversion
Quantity: 2835
Price: 62.11
Following holdings: 99,822
Reporting delay: 1 day
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Shares: 2835
transaction Price Per Share: 62.11
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 99822
direct Or Indirect Ownership: D
nature Of Ownership:

Common Stock

Owner: Whittle John
Date: 2026-09-15
Code: S
Action: Sale
Quantity: 2835
Price: 168.74
Following holdings: 96,987
Reporting delay: 1 day
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 2835
transaction Price Per Share: 168.74
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 96987
direct Or Indirect Ownership: D
nature Of Ownership:

Stock Option (right to buy) (derivative)

Owner: Whittle John
Date: 2026-09-14
Code: M
Action: Exercise or conversion
Quantity: 53865
Price: 0
Following holdings: 2,835
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Stock Option (right to buy)
conversion Or Exercise Price: 62.11
transaction Date: 2026-09-14
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Shares: 53865
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
id: F4
expiration Date: 2029-02-17
underlying Security Title: Common Stock
underlying Security Shares: 53865
shares Owned Following Transaction: 2835
direct Or Indirect Ownership: D
nature Of Ownership:

Stock Option (right to buy) (derivative)

Owner: Whittle John
Date: 2026-09-15
Code: M
Action: Exercise or conversion
Quantity: 2835
Price: 0
Following holdings: 0
Reporting delay: 1 day
Filed terms and references: Filed terms
security Title: Stock Option (right to buy)
conversion Or Exercise Price: 62.11
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Shares: 2835
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
id: F4
expiration Date: 2029-02-17
underlying Security Title: Common Stock
underlying Security Shares: 2835
shares Owned Following Transaction: 0
direct Or Indirect Ownership: D
nature Of Ownership:

Purchases, sales, grants and option exercises are different transactions. The reported code identifies the action; it does not establish a motive.

Filing context

Quantities and prices are shown in the units filed. No trade value is inferred from their product.
Whittle John: CHIEF OPERATING OFFICER.
The filing reports a Rule 10b5-1 trading plan.
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.
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.
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.
F4: The options are fully vested.

Original sources

SEC ownership filing

Prepared automatically from public filing data. Report a correction.

Security

Owner

Date

Code

Action

Quantity

Price

Following holdings

Reporting delay

Filed terms and references

Common Stock

Whittle John

2026-09-14

Exercise or conversion

53865

62.11

150,852

2 days

Filed terms

security Title: Common Stock
transaction Date: 2026-09-14
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Shares: 53865
transaction Price Per Share: 62.11
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 150852
direct Or Indirect Ownership: D
nature Of Ownership:

Common Stock

Whittle John

2026-09-14

Sale

52707

165.4274

98,145

2 days

Filed terms

security Title: Common Stock
transaction Date: 2026-09-14
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 52707
transaction Price Per Share: 165.4274
id: F2
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 98145
direct Or Indirect Ownership: D
nature Of Ownership:

Common Stock

Whittle John

2026-09-14

Sale

1158

166.0175

96,987

2 days

Filed terms

security Title: Common Stock
transaction Date: 2026-09-14
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 1158
transaction Price Per Share: 166.0175
id: F3
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 96987
direct Or Indirect Ownership: D
nature Of Ownership:

Common Stock

Whittle John

2026-09-15

Exercise or conversion

2835

62.11

99,822

1 day

Filed terms

security Title: Common Stock
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Shares: 2835
transaction Price Per Share: 62.11
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 99822
direct Or Indirect Ownership: D
nature Of Ownership:

Common Stock

Whittle John

2026-09-15

Sale

2835

168.74

96,987

1 day

Filed terms

security Title: Common Stock
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 2835
transaction Price Per Share: 168.74
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 96987
direct Or Indirect Ownership: D
nature Of Ownership:

Stock Option (right to buy) (derivative)

Whittle John

2026-09-14

Exercise or conversion

53865

2,835

2 days

Filed terms

security Title: Stock Option (right to buy)
conversion Or Exercise Price: 62.11
transaction Date: 2026-09-14
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Shares: 53865
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
id: F4
expiration Date: 2029-02-17
underlying Security Title: Common Stock
underlying Security Shares: 53865
shares Owned Following Transaction: 2835
direct Or Indirect Ownership: D
nature Of Ownership:

Stock Option (right to buy) (derivative)

Whittle John

2026-09-15

Exercise or conversion

2835

1 day

Filed terms

security Title: Stock Option (right to buy)
conversion Or Exercise Price: 62.11
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Shares: 2835
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
id: F4
expiration Date: 2029-02-17
underlying Security Title: Common Stock
underlying Security Shares: 2835
shares Owned Following Transaction: 0
direct Or Indirect Ownership: D
nature Of Ownership:

Filing context

Quantities and prices are shown in the units filed. No trade value is inferred from their product.

Whittle John: CHIEF OPERATING OFFICER.

The filing reports a Rule 10b5-1 trading plan.

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.

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.

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.

F4: The options are fully vested.