X0306 4 2015-10-12 0 0001327567 Palo Alto Networks Inc PANW 0001250333 ZUK NIR C/O PALO ALTO NETWORKS INC. 4401 GREAT AMERICA PKWY SANTA CLARA CA 95054 1 1 0 0 CTO Common Stock 2015-10-12 4 S 0 2470 170.219 D 2082799 D Common Stock 250000 I See footnote Represents the number of shares sold upon vesting of restricted stock units to cover tax withholding obligations. This sale price represents the weighted average sale price of the shares sold ranging from $167.6725 to $170.23 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 Zuk 2015 GRAT dated June 17, 2015, for which the Reporting Person serves as a trustee. /s/ Jeff True, Attorney-in-Fact for Nir Zuk 2015-10-14