Fortinet Inc

Rule 10b5-1 Trading Plans

On December 9, 2024, William H. Neukom, one of ourdirectors, entered into a pre-arranged written stock sale plan in accordance with Rule 10b5-1 under the Exchange Act for the purchase of shares of our common stock (the “Neukom Plan”) during an open trading window in accordance with our insider trading policy. The Neukom Plan is intended to satisfy the affirmative defense of Rule 10b5-1(c) under the Exchange Act. The Neukom Plan provides for the potential purchase by Mr. Neukom of up to $35,000 worth of shares of our common stock per at the market price, on five dates between March 6, 2025 and March 6, 2026, as specified in the Neukom Plan.

On December 9, 2024, Kenneth A. Goldman, one of ourdirectors, entered into a pre-arranged written stock sale plan in accordance with Rule 10b5-1 under the Exchange Act for the sale of shares of our common stock (the “Goldman Plan”) during an open trading window in accordance with our insider trading policy. The Goldman Plan is intended to satisfy the affirmative defense of Rule 10b5-1(c) under the Exchange Act. The Goldman Plan provides for the potential sale by Mr. Goldman of up to 3,000 shares of our common stock, issued upon the exercise of vested options to purchase shares of our common stock, at the market price, so long as the market price is equal to or greater than $95.00 per share, between March 10, 2025 and March 10, 2026.

On December 9, 2024, Ken Xie, our Chief Executive Officer and one of our directors, entered into a pre-arranged written stock sale plan in accordance with Rule 10b5-1 under the Exchange Act for the sale of shares of our common stock (the “Ken Xie Plan”) during an open trading window in accordance with our insider trading policy. The Ken Xie Plan is intended to satisfy the affirmative defense of Rule 10b5-1(c) under the Exchange Act. The Ken Xie Plan provides for the potential sale by Mr. Xie of up to (a)734,880 shares of our common stock, issued upon the vesting and settlement of RSUs and PSUs for shares of our common stock and the exercise of vested options to purchase shares of our common stock and (b) the net shares (which are not yet determinable) after shares are withheld to satisfy tax obligations upon such vesting and settlement of RSUs and PSUs, in each case, at the market price, all between March 10, 2025 and May 6, 2026.

On December 10, 2024, Michael Xie, our Chief Technology Officer and one of our directors, entered into a pre-arranged written stock sale plan in accordance with Rule 10b5-1 under the Exchange Act for the sale of shares of our common stock (the “Michael Xie Plan”) during an open trading window in accordance with our insider trading policy. The Michael Xie Plan is intended to satisfy the affirmative defense of Rule 10b5-1(c) under the Exchange Act. The Michael Xie Plan provides for the potential sale by Mr. Xie of up to (a)624,285 shares of our common stock, issued upon the vesting and settlement of RSUs for shares of our common stock and the exercise of vested options to purchase shares of our common stock and (b) the net shares (which are not yet determinable) after shares are withheld to satisfy tax obligations upon such vesting and settlement of RSUs and PSUs, in each case, at the market price, all between March 11, 2025 and May 6, 2026.

Each of the Neukom Plan, Goldman Plan, Ken Xie Plan and Michael Xie Plan (each, a “10b5-1 Plan,” and together, the “10b5-1 Plans”) includes a representation from each of Mr. Neukom, Mr. Goldman, Mr. Ken Xie and Mr. Michael Xie, respectively, to the broker administering the plan that they were not in possession of any material nonpublic information regarding us or the securities subject to the respective 10b5-1 Plan at the time the respective 10b5-1 Plan were entered into. A similar representation was made to us in connection with the adoption of each 10b5-1 Plan under our insider trading policy. Those representations for each 10b5-1 Plan were made as of the respective date of adoption of the applicable 10b5-1 Plan, and speak only as of that date. In making those representations, there is no assurance with respect to any material nonpublic information of which Mr. Neukom, Mr. Goldman, Mr. Ken Xie and Mr. Michael Xie, as applicable, were unaware, or with respect to any material nonpublic information acquired by Mr. Neukom, Mr. Goldman, Mr. Ken Xie and Mr. Michael Xie or us, as applicable, after the date of each such representation.

Once executed, transactions under the 10b5-1 Plans will be disclosed publicly through Form 4 and/or Form 144 filings with the SEC in accordance with applicable securities laws, rules and regulations. Except as may be required by law, we do not undertake any obligation to update or report any modification, termination, or other activity under current or future Rule 10b5-1 plans that may be adopted by Mr. Neukom, Mr. Goldman, Mr. Ken Xie or Mr. Michael Xie or our other officers or directors, or their affiliated entities.