X0306 4 2020-08-04 0 0001048695 F5 NETWORKS, INC. FFIV 0001746640 WHALEN CHAD MICHAEL C/O F5 NETWORKS, INC. 801 5TH AVENUE SEATTLE WA 98104 0 1 0 0 EVP, Worldwide Sales Common Stock 2020-08-04 4 S 0 299 140.00 D 5327 D Common Stock 2020-08-04 4 S 0 700 138.9931 D 4627 D Common Stock 2020-08-04 4 S 0 520 139.2508 D 4107 D Common Stock 2020-08-04 4 S 0 312 139.8745 D 3795 D This transaction was executed pursuant to a Rule 10b5-1 trading plan. This transaction was executed pursuant to a Rule 10b5-1 trading plan, in multiple trades at prices ranging from $138.811 to $139.40. 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 $138.91 to $139.82. 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 $139.82 to $139.99. 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. /s/ Scot F. Rogers by Power of Attorney 2020-08-06