| 
                 
                    Closing price on 3/23/2018
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    73.00 | 
                 
                
                    | High | 
                    77.00 | 
                 
                
                    | Low | 
                    73.00 | 
                     
                
                    | Volume | 
                    116,420 | 
                                 
                
                    | Split-adjusted Price | 
                    49.91 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
AST Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                3/23/2018
             | 
            
                -0.20 / -0.26%
             |             
            
                73.00
             |           
            
                77.00
             |               
            
                73.00
             |                           
            
                76.80
             | 
            
                75.71
             |                     
            
                49.91
             |                                 
            
                116,420
             |            
            
                 
             |                                       
         
    
        
            | 
                3/22/2018
             | 
            
                +0.50 / +0.65%
             |             
            
                76.60
             |           
            
                79.00
             |               
            
                74.60
             |                           
            
                77.00
             | 
            
                76.57
             |                     
            
                50.04
             |                                 
            
                173,020
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/21/2018
             | 
            
                -5.50 / -6.71%
             |             
            
                80.30
             |           
            
                82.50
             |               
            
                76.50
             |                           
            
                76.50
             | 
            
                78.97
             |                     
            
                49.71
             |                                 
            
                245,380
             |            
            
                 
             |                                       
         
    
        
            | 
                3/20/2018
             | 
            
                +0.60 / +0.74%
             |             
            
                81.90
             |           
            
                82.40
             |               
            
                80.10
             |                           
            
                82.00
             | 
            
                81.73
             |                     
            
                53.29
             |                                 
            
                552,330
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/19/2018
             | 
            
                -0.60 / -0.73%
             |             
            
                82.90
             |           
            
                82.90
             |               
            
                80.30
             |                           
            
                81.40
             | 
            
                81.65
             |                     
            
                52.90
             |                                 
            
                124,120
             |            
            
                 
             |                                       
         
    
        
            | 
                3/16/2018
             | 
            
                +4.30 / +5.53%
             |             
            
                77.70
             |           
            
                82.00
             |               
            
                77.50
             |                           
            
                82.00
             | 
            
                79.47
             |                     
            
                53.29
             |                                 
            
                228,160
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/15/2018
             | 
            
                -5.80 / -6.95%
             |             
            
                84.00
             |           
            
                84.00
             |               
            
                77.70
             |                           
            
                77.70
             | 
            
                80.27
             |                     
            
                50.49
             |                                 
            
                321,820
             |            
            
                 
             |                                       
         
    
        
            | 
                3/14/2018
             | 
            
                +0.60 / +0.72%
             |             
            
                83.70
             |           
            
                84.20
             |               
            
                82.90
             |                           
            
                83.50
             | 
            
                83.59
             |                     
            
                54.26
             |                                 
            
                138,290
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/13/2018
             | 
            
                -0.30 / -0.36%
             |             
            
                83.00
             |           
            
                83.80
             |               
            
                81.00
             |                           
            
                82.90
             | 
            
                82.46
             |                     
            
                53.87
             |                                 
            
                155,190
             |            
            
                 
             |                                       
         
    
        
            | 
                3/12/2018
             | 
            
                -1.70 / -2.00%
             |             
            
                85.70
             |           
            
                86.00
             |               
            
                83.20
             |                           
            
                83.20
             | 
            
                84.85
             |                     
            
                54.07
             |                                 
            
                125,910
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/9/2018
             | 
            
                +3.90 / +4.81%
             |             
            
                81.50
             |           
            
                85.30
             |               
            
                81.50
             |                           
            
                84.90
             | 
            
                84.58
             |                     
            
                55.17
             |                                 
            
                219,610
             |            
            
                 
             |                                       
         
    
        
            | 
                3/8/2018
             | 
            
                +2.60 / +3.32%
             |             
            
                79.00
             |           
            
                81.00
             |               
            
                78.40
             |                           
            
                81.00
             | 
            
                79.54
             |                     
            
                52.64
             |                                 
            
                486,690
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/7/2018
             | 
            
                -0.30 / -0.38%
             |             
            
                78.70
             |           
            
                82.00
             |               
            
                77.80
             |                           
            
                78.40
             | 
            
                79.58
             |                     
            
                50.95
             |                                 
            
                465,610
             |            
            
                 
             |                                       
         
    
        
            | 
                3/6/2018
             | 
            
                -0.30 / -0.38%
             |             
            
                79.00
             |           
            
                79.00
             |               
            
                77.30
             |                           
            
                78.70
             | 
            
                78.11
             |                     
            
                51.14
             |                                 
            
                422,950
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/5/2018
             | 
            
                +2.20 / +2.86%
             |             
            
                78.00
             |           
            
                80.00
             |               
            
                78.00
             |                           
            
                79.00
             | 
            
                79.41
             |                     
            
                51.34
             |                                 
            
                386,220
             |            
            
                 
             |                                       
         
    
        
            | 
                3/2/2018
             | 
            
                +4.80 / +6.67%
             |             
            
                71.80
             |           
            
                77.00
             |               
            
                71.60
             |                           
            
                76.80
             | 
            
                73.08
             |                     
            
                49.91
             |                                 
            
                577,660
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/1/2018
             | 
            
                +0.40 / +0.56%
             |             
            
                72.00
             |           
            
                72.20
             |               
            
                71.60
             |                           
            
                72.00
             | 
            
                71.95
             |                     
            
                46.79
             |                                 
            
                622,090
             |            
            
                 
             |                                       
         
    
        
            | 
                2/28/2018
             | 
            
                0.00 / 0.00%
             |             
            
                71.60
             |           
            
                71.60
             |               
            
                71.20
             |                           
            
                71.60
             | 
            
                71.45
             |                     
            
                46.53
             |                                 
            
                258,250
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/27/2018
             | 
            
                -0.40 / -0.56%
             |             
            
                72.20
             |           
            
                72.20
             |               
            
                71.10
             |                           
            
                71.60
             | 
            
                71.50
             |                     
            
                46.53
             |                                 
            
                219,690
             |            
            
                 
             |                                       
         
    
        
            | 
                2/26/2018
             | 
            
                0.00 / 0.00%
             |             
            
                72.00
             |           
            
                73.60
             |               
            
                71.00
             |                           
            
                72.00
             | 
            
                72.34
             |                     
            
                46.79
             |                                 
            
                205,310
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/23/2018
             | 
            
                +0.70 / +0.98%
             |             
            
                72.00
             |           
            
                72.00
             |               
            
                71.50
             |                           
            
                72.00
             | 
            
                71.78
             |                     
            
                46.79
             |                                 
            
                172,900
             |            
            
                 
             |                                       
         
    
        
            | 
                2/22/2018
             | 
            
                +0.10 / +0.14%
             |             
            
                72.00
             |           
            
                72.00
             |               
            
                70.00
             |                           
            
                71.30
             | 
            
                71.62
             |                     
            
                46.33
             |                                 
            
                161,180
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/21/2018
             | 
            
                +3.30 / +4.86%
             |             
            
                68.50
             |           
            
                72.00
             |               
            
                68.50
             |                           
            
                71.20
             | 
            
                70.79
             |                     
            
                46.27
             |                                 
            
                179,470
             |            
            
                 
             |                                       
         
    
        
            | 
                2/13/2018
             | 
            
                +0.80 / +1.19%
             |             
            
                69.00
             |           
            
                69.00
             |               
            
                67.30
             |                           
            
                67.90
             | 
            
                67.60
             |                     
            
                44.12
             |                                 
            
                122,540
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/12/2018
             | 
            
                +1.50 / +2.29%
             |             
            
                66.50
             |           
            
                69.90
             |               
            
                66.40
             |                           
            
                67.10
             | 
            
                67.06
             |                     
            
                43.60
             |                                 
            
                135,440
             |            
            
                 
             |                                       
         
    
        
            | 
                2/9/2018
             | 
            
                -1.40 / -2.09%
             |             
            
                65.00
             |           
            
                65.80
             |               
            
                64.00
             |                           
            
                65.60
             | 
            
                65.52
             |                     
            
                42.63
             |                                 
            
                175,110
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/8/2018
             | 
            
                +0.50 / +0.75%
             |             
            
                66.50
             |           
            
                67.50
             |               
            
                65.50
             |                           
            
                67.00
             | 
            
                67.19
             |                     
            
                43.54
             |                                 
            
                186,020
             |            
            
                 
             |                                       
         
    
        
            | 
                2/7/2018
             | 
            
                +2.20 / +3.42%
             |             
            
                66.30
             |           
            
                66.50
             |               
            
                65.10
             |                           
            
                66.50
             | 
            
                65.28
             |                     
            
                43.21
             |                                 
            
                302,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/6/2018
             | 
            
                -4.30 / -6.27%
             |             
            
                65.00
             |           
            
                66.80
             |               
            
                63.80
             |                           
            
                64.30
             | 
            
                64.21
             |                     
            
                41.78
             |                                 
            
                380,640
             |            
            
                 
             |                                       
         
    
        
            | 
                2/5/2018
             | 
            
                -1.10 / -1.58%
             |             
            
                69.30
             |           
            
                69.30
             |               
            
                68.20
             |                           
            
                68.60
             | 
            
                68.76
             |                     
            
                44.58
             |                                 
            
                293,730
             |  
            
                 
             |                                                              
             
    
         
    
    
 |