X0306 4 2019-10-31 0 0001048695 F5 NETWORKS, INC. FFIV 0001526624 Locoh-Donou Francois C/O F5 NETWORKS, INC. 801 5TH AVENUE SEATTLE WA 98104 1 1 0 0 President, CEO & Director Common Stock 2019-10-31 4 A 0 15249 0.00 A 45823 D Shares acquired based on performance targets for the May 1, 2017, November 1, 2017 and November 1, 2018 awards of Restricted Stock Units. /s/ Scot F. Rogers by Power of Attorney 2019-11-04