Fortinet (FTNT) 4: Director vests 459 RSU shares (Oct 1, 2026)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-09-30 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: Fortinet, Inc. (FTNT) CIK: 0001262039 --- Reporting Owner --- Name: GOLDMAN KENNETH A CIK: 0001218470 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-09-30 | Code: M (Exercise of derivative) Shares: +459 | Price: $0.00 Shares Owned After: 23,928 | Ownership: D (Direct) Footnotes: [F1] Vesting of restricted stock units ("RSUs") granted to the Reporting Person on August 12, 2026. --- Derivative Transactions --- [Transaction #1] Security: Restricted Stock Units Date: 2026-09-30 | Code: M (Exercise of derivative) Shares: -459 | Price: $0.00 Exercise Price: $0.00 Shares Owned After: 1,377 | Ownership: D (Direct) Footnotes: [F4] Each RSU represents a contingent right to receive one share of the Issuer's common stock upon settlement. [F1] Vesting of restricted stock units ("RSUs") granted to the Reporting Person on August 12, 2026. [F5] 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. [F6] RSUs do not expire; they either vest or are canceled prior to vest date. --- Holdings --- [Holding #1] Security: Common Stock Ownership: I (Indirect) Footnotes: [F2] The Reporting Person is a trustee of the Trust and may be deemed to have voting and dispositive power with regard to the shares held by the Trust. The Reporting Person disclaims beneficial ownership of the shares held by the Trust except to the extent of his pecuniary interest therein. [Holding #2] Security: Common Stock Ownership: I (Indirect) Footnotes: [F3] GV Partners L.P. is a family limited partnership of which the Reporting Person is the managing member. --- Footnotes (Complete Index) --- F1: Vesting of restricted stock units ("RSUs") granted to the Reporting Person on August 12, 2026. F2: The Reporting Person is a trustee of the Trust and may be deemed to have voting and dispositive power with regard to the shares held by the Trust. The Reporting Person disclaims beneficial ownership of the shares held by the Trust except to the extent of his pecuniary interest therein. F3: GV Partners L.P. is a family limited partnership of which the Reporting Person is the managing member. F4: Each RSU represents a contingent right to receive one share of the Issuer's common stock upon settlement. F5: 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. F6: RSUs do not expire; they either vest or are canceled prior to vest date. --- Signature --- /s/ /s/ Robert Turner, by power of attorney (2026-10-01)