F5, INC. — Director's Dealing 2017

May 3, 2017

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: F5 NETWORKS INC (FFIV)
CIK: 0001048695
Period of Report: 2017-05-01

Reporting Person: Locoh-Donou Francois (Director, President, CEO & Director)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2017-05-01	Restricted Stock Units	$0.00	A	21586	Acquired		Common Stock (21586)	Direct
2017-05-01	Restricted Stock Units	$0.00	A	45212	Acquired		Common Stock (45212)	Direct
2017-05-01	Restricted Stock Units	$0.00	A	7850	Acquired		Common Stock (7850)	Direct

Footnotes

F1: Each Restricted Stock Unit represents a contingent right to receive one share of F5 Networks, Inc. Common Stock on the vest date.

F2: Concurrent with the award of service-based Restricted Stock Units, the Company granted the reporting person additional Restricted Stock Units that vest based on performance targets ("Performance RSUs"). If the performance targets are achieved at 100%, the reporting person will receive 21,586 Performance RSUs over the vesting period; the actual number of Performance RSUs received may be more or less depending on whether and to the extent that performance is greater than or less than targets. Performance RSUs are not reported in Table II; the underlying shares of Performance RSUs will be reported in Table I if and when the Compensation Committee of the Board of Directors determines that the performance targets have been achieved.

F3: This May 1, 2017 award of service-based Restricted Stock Units vests in sixteen equal quarterly increments beginning August 1, 2017.

F4: 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.

F5: Thirty-three and one third percent (33 1/3%) of this May 1, 2017 award of service-based Restricted Stock Units vests on May 1, 2018 and the remaining sixty-six and two thirds percent (66 2/3%) vests in eight equal quarterly increments beginning August 1, 2018.

F6: Twenty five percent (25%) of this May 1, 2017 award of service-based Restricted Stock Units vests on May 1, 2018 and the remaining seventy five percent (75%) vests in twelve equal quarterly increments beginning August 1, 2018.