-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 LJ8YKlQ5/DdpFR6EFmnZl9Z36VbdjoGlEILzugMrxkMHZy+tn8zjmSRoPJWmTh2L
 qtndhz3YHKrKB2edd6vbrg==

<SEC-DOCUMENT>0000950123-09-018828.txt : 20090630
<SEC-HEADER>0000950123-09-018828.hdr.sgml : 20090630
<ACCEPTANCE-DATETIME>20090629201023
ACCESSION NUMBER:		0000950123-09-018828
CONFORMED SUBMISSION TYPE:	S-8
PUBLIC DOCUMENT COUNT:		4
FILED AS OF DATE:		20090630
DATE AS OF CHANGE:		20090629
EFFECTIVENESS DATE:		20090630

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			F5 NETWORKS INC
		CENTRAL INDEX KEY:			0001048695
		STANDARD INDUSTRIAL CLASSIFICATION:	COMPUTER COMMUNICATIONS EQUIPMENT [3576]
		IRS NUMBER:				911714307
		STATE OF INCORPORATION:			WA
		FISCAL YEAR END:			0930

	FILING VALUES:
		FORM TYPE:		S-8
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-160321
		FILM NUMBER:		09917647

	BUSINESS ADDRESS:	
		STREET 1:		401 ELLIOT AVE WEST
		STREET 2:		STE 500
		CITY:			SEATTLE
		STATE:			WA
		ZIP:			98119
		BUSINESS PHONE:		2062725555

	MAIL ADDRESS:	
		STREET 1:		401 ELLIOT AVE WEST
		STREET 2:		STE 500
		CITY:			SEATTLE
		STATE:			WA
		ZIP:			98119

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	F5 LABS INC
		DATE OF NAME CHANGE:	19990305
</SEC-HEADER>
<DOCUMENT>
<TYPE>S-8
<SEQUENCE>1
<FILENAME>v52821sv8.htm
<DESCRIPTION>FORM S-8
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5.1
<SEQUENCE>2
<FILENAME>v52821exv5w1.htm
<DESCRIPTION>EX-5.1
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-10.17
<SEQUENCE>3
<FILENAME>v52821exv10w17.htm
<DESCRIPTION>EX-10.17
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>4
<FILENAME>v52821exv23w1.htm
<DESCRIPTION>EX-23.1
</DOCUMENT>
</SUBMISSION>