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Stock Trading History of Grinstein Keith

The following table details the trading activities (stock purchases, stock sales, and stock option exercises) reported to the Securities and Exchange Commission (SEC) by insider Grinstein Keith since year 2005. The trader's CIK number is 1014801. At the time of this reporting, Grinstein Keith is the Director of F5 Networks Inc . (stock ticker symbol FFIV). See this page for all insider trading activities at F5 Networks Inc .

Stock purchases, sales, and option exercises reported by insider *Grinstein Keith* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2008-03-10	FFIV	F5 Networks Inc	Option Exercise	5,412	.00	0
2007-03-21	FFIV	F5 Networks Inc	Option Exercise	5,000	.00	0
2007-02-07	FFIV	F5 Networks Inc	Sale	5,000	73.00	365,000
2007-02-07	FFIV	F5 Networks Inc	Option Exercise	5,000	28.10	140,500
2006-03-02	FFIV	F5 Networks Inc	Option Exercise	2,500	.00	0

Insider trading activities including stock purchases, stock sales, and option exercises listed in the above table cannot be completely guaranteed as to their accuracy. For more information regarding the trades made by Grinstein Keith (Director of F5 Networks Inc at the time of this reporting) see the Securities and Exchange Commission (SEC) website.