F5, INC. — Director's Dealing 2010

Nov 2, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: F5 NETWORKS INC (FFIV)
CIK: 0001048695
Period of Report: 2010-11-01

Reporting Person: TRIEBES KARL D (SrVP Product Development & CTO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-11-01	Common Stock	M	8927	$0.00	Acquired	8927	Direct
2010-11-01	Common Stock	S	8927	$116.669	Disposed	0	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-11-01	Restricted Stock Units	$0.00	M	6932	Disposed	2019-08-03	Common Stock (6932)	Direct
2010-11-01	Restricted Stock Units	$0.00	M	1995	Disposed	2020-08-02	Common Stock (1995)	Direct

Footnotes

F1: Shares received from vesting of the 8/3/2009 and 8/2/2010 (exercisable date of 11/1/2010) restricted stock unit grants.

F2: Sale pursuant to the terms of a 10b5-1 trading plan.