This excerpt taken from the FFIV DEF 14A filed Jan 20, 2009.
New Plan Benefits
No purchase rights have been granted, and no shares have been issued, on the basis of the 2,000,000 share increase, which is the subject of this proposal. Because benefits under the ESPP will depend on employees elections to participate and the fair market value of the Companys common stock at various future dates, it is not possible to determine the benefits that will be received by executive officers and other employees if the share increase is approved by the shareholders. Non-employee directors are not eligible to participate in the ESPP. However, during the fiscal year ended September 30, 2008, the following persons or groups purchased
shares of common stock under the ESPP as follows, at a price per share determined as described above of $30.6255 (October 31, 2007 purchase) and $19.2355 (April 30, 2008 purchase):