Fortinet, Inc. — Director's Dealing 2026

Feb 3, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Fortinet, Inc. (FTNT)
CIK: 0001262039
Period of Report: 2026-02-01

Reporting Person: Xie Ken (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-02-01	Common Stock	M	6020	—	Acquired	51397899	Direct
2026-02-01	Common Stock	M	6260	—	Acquired	51404159	Direct
2026-02-01	Common Stock	M	4558	—	Acquired	51408717	Direct
2026-02-01	Common Stock	M	9101	—	Acquired	51417818	Direct
2026-02-01	Common Stock	M	62109	—	Acquired	51479927	Direct
2026-02-01	Common Stock	F	42685	$81.26	Disposed	51437242	Direct
2026-02-02	Common Stock	M	134880	$16.898	Acquired	51572122	Direct
2026-02-02	Common Stock	S	80392	$81.057	Disposed	51491730	Direct
2026-02-02	Common Stock	S	94170	$81.7179	Disposed	51397560	Direct
2026-02-02	Common Stock	S	1175	$82.3304	Disposed	51396385	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2026-02-01	Restricted Stock Units	$0	M	6020	Disposed		Common Stock (6020)	Direct
2026-02-01	Restricted Stock Units	$0	M	6260	Disposed		Common Stock (6260)	Direct
2026-02-01	Restricted Stock Units	$0	M	4558	Disposed		Common Stock (4558)	Direct
2026-02-01	Restricted Stock Units	$0	M	9101	Disposed		Common Stock (9101)	Direct
2026-02-01	Performance Stock Units	$0	M	62109	Disposed		Common Stock (62109)	Direct
2026-02-02	Nonqualified Stock Option (right to buy)	$16.898	M	134880	Disposed	2026-02-21	Common Stock (134880)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	3243799	Indirect
Common Stock	3243799	Indirect
Common Stock	2314268	Indirect

Footnotes

F1: Vesting of restricted stock units ("RSUs") or performance stock units ("PSUs") previously granted to the Reporting Person.

F2: Exempt transaction pursuant to Section 16b-3(e) - payment of exercise price or tax liability by delivering or withholding securities incident to the receipt, exercise or vesting of a security issued in accordance with Rule 16b-3. All of the shares reported as disposed of in this Form 4 were relinquished by the Reporting Person and cancelled by the Issuer in exchange for the Issuer's agreement to pay federal and state tax withholding obligations of the Reporting Person resulting from the vesting of restricted stock units.

F3: The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 9, 2024.

F4: Represents the weighted average sale price. The lowest price at which shares were sold was $80.31 and the highest price at which shares were sold was $81.30.

F5: Represents the weighted average sale price. The lowest price at which shares were sold was $81.31 and the highest price at which shares were sold was $82.30.

F6: Reepresents the weighted average sale price. The lowest price at which shares were sold was $82.31 and the highest price at which shares were sold was $82.36.

F7: These securities are held by a grantor retained annuity trust for the benefit of the Reporting Person.

F8: These securities are held by a grantor retained annuity trust for the benefit of the Reporting Person's spouse.

F9: Each RSU and PSU represents a contingent right to receive one share of the Issuer's common stock upon settlement.

F10: 25% of the RSUs vested on February 1, 2023, and the remaining 75% of the RSUs will vest in equal installments on each quarterly anniversary thereafter, until such time as the RSUs are 100% vested, subject to the Reporting Person's provision of service to the Issuer on each vesting date. Shares of the Issuer's common stock will be delivered to the Reporting Person upon settlement.

F11: RSUs and PSUs do not expire; they either vest or are canceled prior to the vesting date.

F12: 25% of the RSUs vested on February 1, 2024, and the remaining 75% of the RSUs will vest in equal installments on each quarterly anniversary thereafter, until such time as the RSUs are 100% vested, subject to the Reporting Person's provision of service to the Issuer on each vesting date. Shares of the Issuer's common stock will be delivered to the Reporting Person upon settlement.

F13: 25% of the RSUs vested on February 1, 2025, and the remaining 75% of the RSUs will vest in equal installments on each quarterly anniversary thereafter, until such time as the RSUs are 100% vested, subject to the Reporting Person's provision of service to the Issuer on each vesting date. Shares of the Issuer's common stock will be delivered to the Reporting Person upon settlement.

F14: 25% of the RSUs vested on February 1, 2026, and the remaining 75% of the RSUs will vest in equal installments on each quarterly anniversary thereafter, until such time as the RSUs are 100% vested, subject to the Reporting Person's provision of service to the Issuer on each vesting date. Shares of the Issuer's common stock will be delivered to the Reporting Person upon vesting.

F15: 100% of the PSUs vest and settle on February 1, 2026, subject to the Reporting Person's provision of service to the Issuer on such date. Shares of the Issuer's common stock will be delivered to the Reporting Person upon settlement.

F16: The options are fully vested.