FTNT · Fortinet, Inc.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock upon settlement.

The RSUs will vest in substantially equal increments on each of September 30, 2026, December 31, 2026, March 31, 2027, and the earlier of (i) June 30, 2027 and (ii) the date immediately preceding the Issuer's 2027 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.

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

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock upon settlement.

The RSUs will vest in substantially equal increments on each of September 30, 2026, December 31, 2026, March 31, 2027, and the earlier of (i) June 30, 2027 and (ii) the date immediately preceding the Issuer's 2027 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.

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

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock upon settlement.

The RSUs will vest in substantially equal increments on each of September 30, 2026, December 31, 2026, March 31, 2027, and the earlier of (i) June 30, 2027 and (ii) the date immediately preceding the Issuer's 2027 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.

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

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock upon settlement.

The RSUs will vest in substantially equal increments on each of September 30, 2026, December 31, 2026, March 31, 2027, and the earlier of (i) June 30, 2027 and (ii) the date immediately preceding the Issuer's 2027 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.

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

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock upon settlement.

The RSUs will vest in substantially equal increments on each of September 30, 2026, December 31, 2026, March 31, 2027, and the earlier of (i) June 30, 2027 and (ii) the date immediately preceding the Issuer's 2027 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.

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

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock upon settlement.

The RSUs will vest in substantially equal increments on each of September 30, 2026, December 31, 2026, March 31, 2027, and the earlier of (i) June 30, 2027 and (ii) the date immediately preceding the Issuer's 2027 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.

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

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock upon settlement.

The RSUs will vest in substantially equal increments on each of September 30, 2026, December 31, 2026, March 31, 2027, and the earlier of (i) June 30, 2027 and (ii) the date immediately preceding the Issuer's 2027 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.

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

The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 7, 2025.

The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 3, 2026.

Represents the weighted average sale price. The lowest price at which shares were sold was $162.49 and the highest price at which shares were sold was $163.48.

The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 3, 2026.

Represents the weighted average sale price. The lowest price at which shares were sold was $160.45 and the highest price at which shares were sold was $161.44.

The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 4, 2026.

Represents the weighted average sale price. The lowest price at which shares were sold was $160.04 and the highest price at which shares were sold was $160.79. 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 ranges set forth in footnotes (4), (5), (6) and (7) to this Form 4.

The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 3, 2026.

Represents the weighted average sale price. The lowest price at which shares were sold was $163.49 and the highest price at which shares were sold was $164.48.

The options are fully vested.

The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 4, 2026.

Represents the weighted average sale price. The lowest price at which shares were sold was $161.49 and the highest price at which shares were sold was $162.01.

The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 3, 2026.

Represents the weighted average sale price. The lowest price at which shares were sold was $161.45 and the highest price at which shares were sold was $162.43.

The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 3, 2026.

Represents the weighted average sale price. The lowest price at which shares were sold was $159.45 and the highest price at which shares were sold was $160.44. 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 ranges set forth in footnotes (4), (5), (6), (7) and (8) to this Form 4.

The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 4, 2026.

Represents the weighted average sale price. The lowest price at which shares were sold was $162.615 and the highest price at which shares were sold was $163.57.

The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 3, 2026.

The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 4, 2026.

Represents the weighted average sale price. The lowest price at which shares were sold was $163.64 and the highest price at which shares were sold was $164.15.

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

Vesting of restricted stock units ("RSUs") previously granted to the Reporting Person.

25% of the RSUs vested on May 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 settlement.

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

Vesting of restricted stock units ("RSUs") previously granted to the Reporting Person.

Vesting of restricted stock units ("RSUs") previously granted to the Reporting Person.

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

Vesting of restricted stock units ("RSUs") previously granted to the Reporting Person.

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 settlement.

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

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

Vesting of restricted stock units ("RSUs") previously granted to the Reporting Person.

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.

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

Vesting of restricted stock units ("RSUs") previously granted to the Reporting Person.

Vesting of restricted stock units ("RSUs") previously granted to the Reporting Person.

Vesting of restricted stock units ("RSUs") previously granted to the Reporting Person.

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.

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.

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

Vesting of restricted stock units ("RSUs") previously granted to the Reporting Person.

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 settlement.

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

Vesting of restricted stock units ("RSUs") previously granted to the Reporting Person.

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 RSUs.

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

Vesting of restricted stock units ("RSUs") previously granted to the Reporting Person.

25% of the RSUs vested on May 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.

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

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.

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

Vesting of restricted stock units ("RSUs") previously granted to the Reporting Person.

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.

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

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

Vesting of restricted stock units ("RSUs") previously granted to the Reporting Person.

25% of the RSUs will vest 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 settlement.

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

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

Vesting of restricted stock units ("RSUs") previously granted to the Reporting Person.

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.

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

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

Vesting of restricted stock units ("RSUs") previously granted to the Reporting Person.

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.

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

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

Vesting of restricted stock units ("RSUs") previously granted to the Reporting Person.

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 vesting.

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

Vesting of restricted stock units ("RSUs") previously granted to the Reporting Person.

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

Vesting of restricted stock units ("RSUs") previously granted to the Reporting Person.

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.

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

Vesting of restricted stock units ("RSUs") previously granted to the Reporting Person.

Vesting of restricted stock units ("RSUs") previously granted to the Reporting Person.

Vesting of restricted stock units ("RSUs") previously granted to the Reporting Person.

Vesting of restricted stock units ("RSUs") previously granted to the Reporting Person.

Vesting of restricted stock units ("RSUs") previously granted to the Reporting Person.

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

Vesting of restricted stock units ("RSUs") previously granted to the Reporting Person.

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.

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

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

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

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.

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