| 
                 
                    Closing price on 9/24/2015
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    25.00 | 
                 
                
                    | High | 
                    25.00 | 
                 
                
                    | Low | 
                    25.00 | 
                     
                
                    | Volume | 
                    20 | 
                                 
                
                    | Split-adjusted Price | 
                    7.99 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
STG Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                9/24/2015
             | 
            
                +1.60 / +6.84%
             |             
            
                25.00
             |           
            
                25.00
             |               
            
                25.00
             |                           
            
                25.00
             | 
            
                25.00
             |                     
            
                7.99
             |                                 
            
                20
             |            
            
                 
             |                                       
         
    
        
            | 
                9/23/2015
             | 
            
                +0.70 / +3.08%
             |             
            
                23.00
             |           
            
                23.40
             |               
            
                23.00
             |                           
            
                23.40
             | 
            
                23.20
             |                     
            
                7.48
             |                                 
            
                1,190,070
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/22/2015
             | 
            
                0.00 / 0.00%
             |             
            
                22.70
             |           
            
                22.70
             |               
            
                22.70
             |                           
            
                22.70
             | 
            
                22.70
             |                     
            
                7.25
             |                                 
            
                2,690
             |            
            
                 
             |                                       
         
    
        
            | 
                9/21/2015
             | 
            
                -0.80 / -3.40%
             |             
            
                23.00
             |           
            
                23.00
             |               
            
                22.70
             |                           
            
                22.70
             | 
            
                22.83
             |                     
            
                7.25
             |                                 
            
                3,680
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/18/2015
             | 
            
                0.00 / 0.00%
             |             
            
                23.60
             |           
            
                23.60
             |               
            
                23.50
             |                           
            
                23.50
             | 
            
                23.55
             |                     
            
                7.51
             |                                 
            
                160
             |            
            
                 
             |                                       
         
    
        
            | 
                9/17/2015
             | 
            
                +1.20 / +5.38%
             |             
            
                22.20
             |           
            
                23.50
             |               
            
                22.20
             |                           
            
                23.50
             | 
            
                22.29
             |                     
            
                7.51
             |                                 
            
                3,320
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/16/2015
             | 
            
                -1.20 / -5.11%
             |             
            
                23.40
             |           
            
                23.40
             |               
            
                22.30
             |                           
            
                22.30
             | 
            
                22.58
             |                     
            
                7.12
             |                                 
            
                1,980,310
             |            
            
                 
             |                                       
         
    
        
            | 
                9/15/2015
             | 
            
                +0.90 / +3.98%
             |             
            
                23.00
             |           
            
                23.50
             |               
            
                23.00
             |                           
            
                23.50
             | 
            
                23.25
             |                     
            
                7.51
             |                                 
            
                40
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/14/2015
             | 
            
                -12.40 / -35.43%
             |             
            
                20.00
             |           
            
                22.60
             |               
            
                20.00
             |                           
            
                22.60
             | 
            
                22.22
             |                     
            
                7.22
             |                                 
            
                630
             |            
            
                 
             |                                       
         
    
        
            | 
                9/11/2015
             | 
            
                +0.70 / +2.04%
             |             
            
                35.00
             |           
            
                35.00
             |               
            
                33.00
             |                           
            
                35.00
             | 
            
                33.88
             |                     
            
                6.78
             |                                 
            
                14,580
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/10/2015
             | 
            
                -0.80 / -2.28%
             |             
            
                35.20
             |           
            
                35.20
             |               
            
                34.30
             |                           
            
                34.30
             | 
            
                34.78
             |                     
            
                6.64
             |                                 
            
                11,300
             |            
            
                 
             |                                       
         
    
        
            | 
                9/9/2015
             | 
            
                -0.90 / -2.50%
             |             
            
                34.00
             |           
            
                35.90
             |               
            
                34.00
             |                           
            
                35.10
             | 
            
                34.77
             |                     
            
                6.80
             |                                 
            
                4,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/8/2015
             | 
            
                +1.30 / +3.75%
             |             
            
                36.90
             |           
            
                36.90
             |               
            
                34.90
             |                           
            
                36.00
             | 
            
                35.63
             |                     
            
                6.97
             |                                 
            
                5,080
             |            
            
                 
             |                                       
         
    
        
            | 
                9/7/2015
             | 
            
                +2.20 / +6.77%
             |             
            
                32.50
             |           
            
                34.70
             |               
            
                32.50
             |                           
            
                34.70
             | 
            
                33.93
             |                     
            
                6.72
             |                                 
            
                5,040
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/4/2015
             | 
            
                +1.00 / +3.17%
             |             
            
                31.50
             |           
            
                32.50
             |               
            
                30.20
             |                           
            
                32.50
             | 
            
                31.85
             |                     
            
                6.29
             |                                 
            
                1,350
             |            
            
                 
             |                                       
         
    
        
            | 
                9/3/2015
             | 
            
                +1.50 / +5.00%
             |             
            
                31.50
             |           
            
                31.50
             |               
            
                30.10
             |                           
            
                31.50
             | 
            
                30.30
             |                     
            
                6.10
             |                                 
            
                330
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/1/2015
             | 
            
                +0.50 / +1.69%
             |             
            
                29.50
             |           
            
                30.10
             |               
            
                29.50
             |                           
            
                30.00
             | 
            
                29.74
             |                     
            
                5.81
             |                                 
            
                117,970
             |            
            
                 
             |                                       
         
    
        
            | 
                8/31/2015
             | 
            
                0.00 / 0.00%
             |             
            
                31.50
             |           
            
                31.50
             |               
            
                29.50
             |                           
            
                29.50
             | 
            
                31.37
             |                     
            
                5.71
             |                                 
            
                4,590
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/28/2015
             | 
            
                -1.80 / -5.75%
             |             
            
                31.30
             |           
            
                33.40
             |               
            
                29.50
             |                           
            
                29.50
             | 
            
                32.63
             |                     
            
                5.71
             |                                 
            
                4,750
             |            
            
                 
             |                                       
         
    
        
            | 
                8/27/2015
             | 
            
                +2.00 / +6.83%
             |             
            
                30.00
             |           
            
                31.30
             |               
            
                30.00
             |                           
            
                31.30
             | 
            
                31.18
             |                     
            
                6.06
             |                                 
            
                930
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/26/2015
             | 
            
                -1.70 / -5.48%
             |             
            
                31.00
             |           
            
                31.90
             |               
            
                29.30
             |                           
            
                29.30
             | 
            
                30.38
             |                     
            
                5.67
             |                                 
            
                240
             |            
            
                 
             |                                       
         
    
        
            | 
                8/25/2015
             | 
            
                +1.90 / +6.53%
             |             
            
                29.00
             |           
            
                31.10
             |               
            
                28.50
             |                           
            
                31.00
             | 
            
                29.24
             |                     
            
                6.00
             |                                 
            
                28,550
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/24/2015
             | 
            
                0.00 / 0.00%
             |             
            
                29.10
             |           
            
                29.10
             |               
            
                29.10
             |                           
            
                29.10
             | 
            
                29.10
             |                     
            
                5.63
             |                                 
            
                220
             |            
            
                 
             |                                       
         
    
        
            | 
                8/21/2015
             | 
            
                -2.10 / -6.73%
             |             
            
                32.00
             |           
            
                32.00
             |               
            
                29.10
             |                           
            
                29.10
             | 
            
                30.55
             |                     
            
                5.63
             |                                 
            
                150
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/20/2015
             | 
            
                -2.30 / -6.87%
             |             
            
                34.00
             |           
            
                34.00
             |               
            
                31.20
             |                           
            
                31.20
             | 
            
                32.39
             |                     
            
                6.04
             |                                 
            
                710
             |            
            
                 
             |                                       
         
    
        
            | 
                8/19/2015
             | 
            
                +2.10 / +6.69%
             |             
            
                31.70
             |           
            
                33.50
             |               
            
                31.70
             |                           
            
                33.50
             | 
            
                32.60
             |                     
            
                6.49
             |                                 
            
                20
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/18/2015
             | 
            
                +0.20 / +0.64%
             |             
            
                31.40
             |           
            
                31.40
             |               
            
                31.40
             |                           
            
                31.40
             | 
            
                31.40
             |                     
            
                6.08
             |                                 
            
                10
             |            
            
                 
             |                                       
         
    
        
            | 
                8/17/2015
             | 
            
                +0.20 / +0.65%
             |             
            
                31.50
             |           
            
                31.50
             |               
            
                31.00
             |                           
            
                31.20
             | 
            
                31.02
             |                     
            
                6.04
             |                                 
            
                1,060
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/14/2015
             | 
            
                +0.90 / +2.99%
             |             
            
                31.50
             |           
            
                32.20
             |               
            
                31.00
             |                           
            
                31.00
             | 
            
                31.85
             |                     
            
                6.00
             |                                 
            
                2,700
             |            
            
                 
             |                                       
         
    
        
            | 
                8/13/2015
             | 
            
                -0.40 / -1.31%
             |             
            
                30.10
             |           
            
                30.50
             |               
            
                30.10
             |                           
            
                30.10
             | 
            
                30.20
             |                     
            
                5.83
             |                                 
            
                363,100
             |  
            
                 
             |                                                              
             
    
         
    
    
 |