Company:  GUIDANCE SOFTWARE, INC. (GUID)
Form Type:  SC 13G/A
Filing Date:  2/10/2011 
CIK:  0001375557 
Address:  215 NORTH MARENGO AVENUE 
City, State, Zip:  PASADENA, California 91101 
Telephone:  (626) 229-9191 
Fiscal Year:  12/31 
Last Trade
Last Trade: 
$9.21   		Change: 
0.09 (0.99%)  
Trade Time: 
04:00 PM EST   		Market Cap: 
$259.46M
Description of Business
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  FORM SC 13G/A
  EXHIBIT 99.1
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