F5, INC. — Director's Dealing 2018

May 3, 2018

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: F5 NETWORKS INC (FFIV)
CIK: 0001048695
Period of Report: 2018-05-01

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2018-05-01	Common Stock	M	19792	$0.00	Acquired	25142	Direct
2018-05-02	Common Stock	S	8439	$162.587	Disposed	16703	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2018-05-01	Restricted Stock Unit	$0.00	M	1425	Disposed		Common Stock (1425)	Direct
2018-05-01	Restricted Stock Unit	$0.00	M	15056	Disposed		Common Stock (15056)	Direct
2018-05-01	Restricted Stock Unit	$0.00	M	1962	Disposed		Common Stock (1962)	Direct
2018-05-01	Restricted Stock Unit	$0.00	M	1349	Disposed		Common Stock (1349)	Direct

Footnotes

F1: Shares acquired upon vesting of the May 1, 2017 and November 1, 2017 awards of service-based Restricted Stock Units.

F2: This transaction was executed pursuant to a Rule 10b5-1 trading plan, in multiple trades at prices ranging from $162.58 to $163.55. 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.

F3: Each Restricted Stock Unit represents a contingent right to receive one share of F5 Networks, Inc. Common Stock on the vest date.

F4: This November 1, 2017 award of service-based Restricted Stock Units vests in sixteen equal quarterly increments beginning February 1, 2018.

F5: 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.

F6: This May 1, 2017 award of service-based Restricted Stock Units vests thirty-three and one third percent (33 1/3%) 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.

F7: This May 1, 2017 award of service-based Restricted Stock Units vests twenty five percent (25%) on May 1, 2018 and the remaining seventy five percent (75%) vests in twelve equal quarterly increments beginning August 1, 2018.

F8: This May 1, 2017 award of service-based Restricted Stock Units vests in sixteen equal quarterly increments beginning August 1, 2017.