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Exhibit E

Zix Share Price Compared with the Composite Index 

Surrounding the Proposed Class Period

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

8/1/2003

8/15/20038/29/20039/12/20039/26/2003

10/10/200310/24/2003

11/7/2003

11/21/2003

12/5/2003

12/19/2003

1/2/2004

1/16/20041/30/20042/13/20042/27/20043/12/20043/26/2004

4/9/2004

4/23/2004

5/7/2004

5/21/2004

6/4/2004

6/18/2004

7/2/2004

7/16/20047/30/20048/13/20048/27/2004

Date

Price per Zix Share (all equal at 7/31/03)

Zix

Comp Index

 

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