X0306 4 2016-01-29 0 0001048695 F5 NETWORKS INC FFIV 0001132089 EAMES EDWARD JULIAN C/O F5 NETWORKS, INC. 401 ELLIOTT AVE. WEST SEATTLE WA 98119 0 1 0 0 EVP, Chief Operations Officer Common Stock 2016-01-29 4 A 0 3288 0.00 A 32362 D Common Stock 2016-02-01 4 M 0 3325 0.00 A 35687 D Common Stock 2016-02-01 4 S 0 5341 93.5437 D 30346 D Common Stock 2016-02-01 4 S 0 1272 94.0987 D 29074 D Restricted Stock Units 0.00 2016-02-01 4 M 0 956 0.00 D Common Stock 956 2866 D Restricted Stock Units 0.00 2016-02-01 4 M 0 946 0.00 D Common Stock 946 6629 D Restricted Stock Units 0.00 2016-02-01 4 M 0 661 0.00 D Common Stock 661 7268 D Restricted Stock Units 0.00 2016-02-01 4 M 0 762 0.00 D Common Stock 762 11439 D Shares acquired based on performance targets for the November 1, 2012, November 1, 2013, November 3, 2014 and November 2, 2015 awards of Restricted Stock Units. Shares acquired upon vesting of the November 1, 2012, November 1, 2013, November 3, 2014, and November 2, 2015 awards of service-based Restricted Stock Units. This transaction was executed pursuant to a Rule 10b5-1 trading plan, in multiple trades at prices ranging from $92.8667 to $93.86. The reported price is the weighted average sale price. The reporting person undertakes to provide to the Company, any security holder of the Company, or Securities and Exchange Commission staff, upon request, complete information regarding the number of shares sold at each separate price. This transaction was executed pursuant to a Rule 10b5-1 trading plan, in multiple trades at prices ranging from $93.88 to $94.19. The reported price is the weighted average sale price. The reporting person undertakes to provide to the Company, any security holder of the Company, or Securities and Exchange Commission staff, upon request, complete information regarding the number of shares sold at each separate price. Each Restricted Stock Unit represents a contingent right to receive one share of F5 Networks, Inc. Common Stock on the vest date. The November 1, 2012 award of service-based Restricted Stock Units vests in sixteen equal quarterly increments beginning February 1, 2013. If the reporting person continues to serve as an officer of the Company on the vest date, the corresponding number of shares of Common Stock of F5 Networks, Inc. will be issued to the reporting person on the vest date. The November 1, 2013 award of service-based Restricted Stock Units vests in sixteen equal quarterly increments beginning February 1, 2014. The November 3, 2014 award of service-based Restricted Stock Units vests in sixteen equal quarterly increments beginning February 1, 2015. This November 2, 2015 award of service-based Restricted Stock Units vests in sixteen equal quarterly increments beginning February 1, 2016. /s/ Scot F. Rogers by Power of Attorney 2016-02-02