    <SEC-DOCUMENT>0001140361-20-001416-index.html : 20200124
    <SEC-HEADER>0001140361-20-001416.hdr.sgml : 20200124
    <ACCEPTANCE-DATETIME>20200124160058
    ACCESSION NUMBER:		0001140361-20-001416
    CONFORMED SUBMISSION TYPE:	DEF 14A
    PUBLIC DOCUMENT COUNT:		10
    CONFORMED PERIOD OF REPORT:	20200312
    FILED AS OF DATE:		20200124
    DATE AS OF CHANGE:		20200124
    EFFECTIVENESS DATE:		20200124

    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:		DEF 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	000-26041
    		FILM NUMBER:		20545428

    	BUSINESS ADDRESS:
    		STREET 1:		401 ELLIOTT AVENUE WEST
    		CITY:			SEATTLE
    		STATE:			WA
    		ZIP:			98119
    		BUSINESS PHONE:		2062725555

    	MAIL ADDRESS:
    		STREET 1:		401 ELLIOTT AVENUE WEST
    		CITY:			SEATTLE
    		STATE:			WA
    		ZIP:			98119

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	F5 NETWORKS INC
    		DATE OF NAME CHANGE:	19990308

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	F5 LABS INC
    		DATE OF NAME CHANGE:	19990305
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEF 14A
    <SEQUENCE>1
    <FILENAME>nc10006509x1_def14a.htm
    <DESCRIPTION>DEF 14A
    <TEXT>
    Document 1 - file: nc10006509x1_def14a.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>logo_f5networks.jpg
    <TEXT>
    Document 2 - file: logo_f5networks.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>nc10006509x1_bchart01.jpg
    <TEXT>
    Document 3 - file: nc10006509x1_bchart01.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>nc10006509x1_ccmpchart.jpg
    <TEXT>
    Document 4 - file: nc10006509x1_ccmpchart.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>nc10006509x1_flowchart01.jpg
    <TEXT>
    Document 5 - file: nc10006509x1_flowchart01.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>nc10006509x1_lchart01.jpg
    <TEXT>
    Document 6 - file: nc10006509x1_lchart01.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>nc10006509x1_pc01.jpg
    <TEXT>
    Document 7 - file: nc10006509x1_pc01.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>nc10006509x1_pc02.jpg
    <TEXT>
    Document 8 - file: nc10006509x1_pc02.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>nc10006509x1_pcharts01.jpg
    <TEXT>
    Document 9 - file: nc10006509x1_pcharts01.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>sig_scotfrogers.jpg
    <TEXT>
    Document 10 - file: sig_scotfrogers.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>