| 
                 
                    Closing price on 10/31/2019
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    72.50 | 
                 
                
                    | High | 
                    73.50 | 
                 
                
                    | Low | 
                    72.30 | 
                     
                
                    | Volume | 
                    44,510 | 
                                 
                
                    | Split-adjusted Price | 
                    62.02 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
AST Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                10/31/2019
             | 
            
                +0.10 / +0.14%
             |             
            
                72.50
             |           
            
                73.50
             |               
            
                72.30
             |                           
            
                72.50
             | 
            
                72.70
             |                     
            
                62.02
             |                                 
            
                44,510
             |            
            
                 
             |                                       
         
    
        
            | 
                10/30/2019
             | 
            
                -0.30 / -0.41%
             |             
            
                72.70
             |           
            
                72.70
             |               
            
                71.50
             |                           
            
                72.40
             | 
            
                72.13
             |                     
            
                61.93
             |                                 
            
                62,370
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/29/2019
             | 
            
                -1.30 / -1.76%
             |             
            
                74.00
             |           
            
                74.60
             |               
            
                71.80
             |                           
            
                72.70
             | 
            
                72.74
             |                     
            
                62.19
             |                                 
            
                111,250
             |            
            
                 
             |                                       
         
    
        
            | 
                10/28/2019
             | 
            
                +1.50 / +2.07%
             |             
            
                72.60
             |           
            
                74.00
             |               
            
                72.60
             |                           
            
                74.00
             | 
            
                73.60
             |                     
            
                63.30
             |                                 
            
                46,180
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/25/2019
             | 
            
                +1.40 / +1.97%
             |             
            
                71.50
             |           
            
                73.00
             |               
            
                71.50
             |                           
            
                72.50
             | 
            
                72.30
             |                     
            
                62.02
             |                                 
            
                55,780
             |            
            
                 
             |                                       
         
    
        
            | 
                10/24/2019
             | 
            
                +0.10 / +0.14%
             |             
            
                71.00
             |           
            
                71.20
             |               
            
                70.50
             |                           
            
                71.10
             | 
            
                70.95
             |                     
            
                60.82
             |                                 
            
                48,710
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/23/2019
             | 
            
                +1.00 / +1.43%
             |             
            
                70.00
             |           
            
                71.00
             |               
            
                69.20
             |                           
            
                71.00
             | 
            
                70.41
             |                     
            
                60.73
             |                                 
            
                51,580
             |            
            
                 
             |                                       
         
    
        
            | 
                10/22/2019
             | 
            
                0.00 / 0.00%
             |             
            
                70.00
             |           
            
                70.10
             |               
            
                69.70
             |                           
            
                70.00
             | 
            
                69.83
             |                     
            
                59.88
             |                                 
            
                41,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/21/2019
             | 
            
                +0.50 / +0.72%
             |             
            
                69.50
             |           
            
                70.00
             |               
            
                69.20
             |                           
            
                70.00
             | 
            
                69.63
             |                     
            
                59.88
             |                                 
            
                45,610
             |            
            
                 
             |                                       
         
    
        
            | 
                10/18/2019
             | 
            
                +0.60 / +0.87%
             |             
            
                68.90
             |           
            
                69.60
             |               
            
                68.90
             |                           
            
                69.50
             | 
            
                69.30
             |                     
            
                59.45
             |                                 
            
                58,210
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/17/2019
             | 
            
                +0.40 / +0.58%
             |             
            
                68.60
             |           
            
                69.10
             |               
            
                68.60
             |                           
            
                68.90
             | 
            
                68.95
             |                     
            
                58.94
             |                                 
            
                66,480
             |            
            
                 
             |                                       
         
    
        
            | 
                10/16/2019
             | 
            
                +0.50 / +0.74%
             |             
            
                68.40
             |           
            
                68.90
             |               
            
                68.40
             |                           
            
                68.50
             | 
            
                68.72
             |                     
            
                58.59
             |                                 
            
                75,990
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/15/2019
             | 
            
                -0.10 / -0.15%
             |             
            
                68.30
             |           
            
                68.50
             |               
            
                67.90
             |                           
            
                68.00
             | 
            
                68.30
             |                     
            
                58.17
             |                                 
            
                69,210
             |            
            
                 
             |                                       
         
    
        
            | 
                10/14/2019
             | 
            
                0.00 / 0.00%
             |             
            
                68.20
             |           
            
                68.80
             |               
            
                67.80
             |                           
            
                68.10
             | 
            
                68.44
             |                     
            
                58.25
             |                                 
            
                48,740
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/11/2019
             | 
            
                +1.10 / +1.64%
             |             
            
                67.20
             |           
            
                68.30
             |               
            
                67.20
             |                           
            
                68.10
             | 
            
                68.02
             |                     
            
                58.25
             |                                 
            
                203,490
             |            
            
                 
             |                                       
         
    
        
            | 
                10/10/2019
             | 
            
                +0.10 / +0.15%
             |             
            
                67.00
             |           
            
                67.00
             |               
            
                66.70
             |                           
            
                67.00
             | 
            
                66.85
             |                     
            
                57.31
             |                                 
            
                46,630
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/9/2019
             | 
            
                -0.30 / -0.45%
             |             
            
                67.20
             |           
            
                67.80
             |               
            
                66.80
             |                           
            
                66.90
             | 
            
                67.23
             |                     
            
                57.23
             |                                 
            
                41,930
             |            
            
                 
             |                                       
         
    
        
            | 
                10/8/2019
             | 
            
                -2.00 / -2.89%
             |             
            
                69.40
             |           
            
                69.40
             |               
            
                67.20
             |                           
            
                67.20
             | 
            
                68.01
             |                     
            
                57.48
             |                                 
            
                60,270
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/7/2019
             | 
            
                +2.40 / +3.59%
             |             
            
                67.40
             |           
            
                69.90
             |               
            
                67.30
             |                           
            
                69.20
             | 
            
                68.61
             |                     
            
                59.19
             |                                 
            
                144,180
             |            
            
                 
             |                                       
         
    
        
            | 
                10/4/2019
             | 
            
                +0.60 / +0.91%
             |             
            
                66.50
             |           
            
                67.10
             |               
            
                66.50
             |                           
            
                66.80
             | 
            
                66.65
             |                     
            
                57.14
             |                                 
            
                48,570
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/3/2019
             | 
            
                -0.40 / -0.60%
             |             
            
                66.60
             |           
            
                66.80
             |               
            
                65.80
             |                           
            
                66.20
             | 
            
                66.16
             |                     
            
                56.63
             |                                 
            
                62,800
             |            
            
                 
             |                                       
         
    
        
            | 
                10/2/2019
             | 
            
                -0.10 / -0.15%
             |             
            
                66.70
             |           
            
                66.90
             |               
            
                66.30
             |                           
            
                66.60
             | 
            
                66.60
             |                     
            
                56.97
             |                                 
            
                54,050
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/1/2019
             | 
            
                +0.30 / +0.45%
             |             
            
                66.40
             |           
            
                67.10
             |               
            
                66.40
             |                           
            
                66.70
             | 
            
                66.79
             |                     
            
                57.05
             |                                 
            
                52,160
             |            
            
                 
             |                                       
         
    
        
            | 
                9/30/2019
             | 
            
                +1.20 / +1.84%
             |             
            
                65.20
             |           
            
                66.40
             |               
            
                65.00
             |                           
            
                66.40
             | 
            
                65.80
             |                     
            
                56.80
             |                                 
            
                60,440
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/27/2019
             | 
            
                0.00 / 0.00%
             |             
            
                65.20
             |           
            
                66.10
             |               
            
                65.00
             |                           
            
                65.20
             | 
            
                65.50
             |                     
            
                55.77
             |                                 
            
                66,720
             |            
            
                 
             |                                       
         
    
        
            | 
                9/26/2019
             | 
            
                -0.80 / -1.21%
             |             
            
                66.00
             |           
            
                66.10
             |               
            
                65.20
             |                           
            
                65.20
             | 
            
                65.70
             |                     
            
                55.77
             |                                 
            
                75,250
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/25/2019
             | 
            
                -0.50 / -0.75%
             |             
            
                66.50
             |           
            
                66.90
             |               
            
                65.80
             |                           
            
                66.00
             | 
            
                66.13
             |                     
            
                56.46
             |                                 
            
                67,200
             |            
            
                 
             |                                       
         
    
        
            | 
                9/24/2019
             | 
            
                -1.60 / -2.35%
             |             
            
                68.30
             |           
            
                68.30
             |               
            
                65.20
             |                           
            
                66.50
             | 
            
                66.39
             |                     
            
                56.88
             |                                 
            
                86,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/23/2019
             | 
            
                -3.00 / -4.22%
             |             
            
                71.10
             |           
            
                71.10
             |               
            
                68.10
             |                           
            
                68.10
             | 
            
                69.07
             |                     
            
                58.25
             |                                 
            
                146,180
             |            
            
                 
             |                                       
         
    
        
            | 
                9/20/2019
             | 
            
                +0.10 / +0.14%
             |             
            
                71.20
             |           
            
                72.00
             |               
            
                71.00
             |                           
            
                71.10
             | 
            
                71.38
             |                     
            
                60.82
             |                                 
            
                58,310
             |  
            
                 
             |                                                              
             
    
         
    
    
 |