X0306 4 2018-04-02 0 0001327567 Palo Alto Networks Inc PANW 0001309507 MCLAUGHLIN MARK D C/O PALO ALTO NETWORKS INC. 3000 TANNERY WAY SANTA CLARA CA 95054 1 1 0 0 Chief Executive Officer Common Stock 2018-04-02 4 S 0 2930 178.413 D 122070 I See footnote Common Stock 2018-04-02 4 S 0 8230 179.086 D 113840 I See footnote Common Stock 2018-04-02 4 S 0 3278 180.008 D 110562 I See footnote Common Stock 2018-04-02 4 S 0 562 180.888 D 110000 I See footnote Common Stock 2018-04-02 4 S 0 3983 178.411 D 21017 I See footnote Common Stock 2018-04-02 4 S 0 13154 179.168 D 7863 I See footnote Common Stock 2018-04-02 4 S 0 5425 180.048 D 2438 I See footnote Common Stock 2018-04-02 4 S 0 2438 180.93 D 0 I See footnote Common Stock 296450 D The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person. This sale price represents the weighted average sale price of the shares sold ranging from $177.67 to $178.65 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4. Shares are held by the McLaughlin GRAT I, for which the Reporting Person serves as a trustee. This sale price represents the weighted average sale price of the shares sold ranging from $178.67 to $179.65 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4. This sale price represents the weighted average sale price of the shares sold ranging from $179.67 to $180.61 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4. This sale price represents the weighted average sale price of the shares sold ranging from $180.68 to $180.29 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4. Shares are held by the McLaughlin GRAT II, for which the Reporting Person serves as a trustee. This sale price represents the weighted average sale price of the shares sold ranging from $180.68 to $181.535 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4. /s/ Jeff True, Attorney-in-Fact for Mark D. McLaughlin 2018-04-04