| 
                 
                    Closing price on 1/28/2021
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    56.90 | 
                 
                
                    | High | 
                    58.00 | 
                 
                
                    | Low | 
                    56.80 | 
                     
                
                    | Volume | 
                    56,100 | 
                                 
                
                    | Split-adjusted Price | 
                    51.14 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
AST Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                1/28/2021
             | 
            
                -4.20 / -6.89%
             |             
            
                56.90
             |           
            
                58.00
             |               
            
                56.80
             |                           
            
                56.80
             | 
            
                56.80
             |                     
            
                51.14
             |                                 
            
                56,100
             |            
            
                 
             |                                       
         
    
        
            | 
                1/27/2021
             | 
            
                -0.40 / -0.65%
             |             
            
                59.70
             |           
            
                62.50
             |               
            
                59.70
             |                           
            
                61.00
             | 
            
                61.23
             |                     
            
                54.92
             |                                 
            
                62,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/26/2021
             | 
            
                -2.00 / -3.15%
             |             
            
                62.00
             |           
            
                62.50
             |               
            
                61.40
             |                           
            
                61.40
             | 
            
                61.83
             |                     
            
                55.28
             |                                 
            
                47,800
             |            
            
                 
             |                                       
         
    
        
            | 
                1/25/2021
             | 
            
                -0.60 / -0.94%
             |             
            
                64.00
             |           
            
                64.00
             |               
            
                62.60
             |                           
            
                63.40
             | 
            
                63.48
             |                     
            
                57.08
             |                                 
            
                64,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/22/2021
             | 
            
                +1.50 / +2.40%
             |             
            
                62.50
             |           
            
                64.40
             |               
            
                62.00
             |                           
            
                64.00
             | 
            
                63.29
             |                     
            
                57.62
             |                                 
            
                81,100
             |            
            
                 
             |                                       
         
    
        
            | 
                1/21/2021
             | 
            
                -0.40 / -0.64%
             |             
            
                63.40
             |           
            
                63.40
             |               
            
                62.20
             |                           
            
                62.50
             | 
            
                62.74
             |                     
            
                56.27
             |                                 
            
                46,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/20/2021
             | 
            
                +3.50 / +5.89%
             |             
            
                59.40
             |           
            
                63.50
             |               
            
                58.70
             |                           
            
                62.90
             | 
            
                60.37
             |                     
            
                56.63
             |                                 
            
                192,600
             |            
            
                 
             |                                       
         
    
        
            | 
                1/19/2021
             | 
            
                -0.10 / -0.17%
             |             
            
                59.50
             |           
            
                60.20
             |               
            
                59.00
             |                           
            
                59.40
             | 
            
                59.39
             |                     
            
                53.48
             |                                 
            
                220,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/18/2021
             | 
            
                +0.20 / +0.34%
             |             
            
                59.40
             |           
            
                59.80
             |               
            
                58.50
             |                           
            
                59.50
             | 
            
                59.30
             |                     
            
                53.57
             |                                 
            
                144,000
             |            
            
                 
             |                                       
         
    
        
            | 
                1/15/2021
             | 
            
                -0.70 / -1.17%
             |             
            
                60.00
             |           
            
                60.00
             |               
            
                58.60
             |                           
            
                59.30
             | 
            
                59.20
             |                     
            
                53.39
             |                                 
            
                137,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/14/2021
             | 
            
                +1.40 / +2.39%
             |             
            
                58.80
             |           
            
                60.00
             |               
            
                58.40
             |                           
            
                60.00
             | 
            
                59.39
             |                     
            
                54.02
             |                                 
            
                82,900
             |            
            
                 
             |                                       
         
    
        
            | 
                1/13/2021
             | 
            
                -1.10 / -1.84%
             |             
            
                59.50
             |           
            
                59.90
             |               
            
                58.50
             |                           
            
                58.60
             | 
            
                58.60
             |                     
            
                52.76
             |                                 
            
                130,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/12/2021
             | 
            
                +1.90 / +3.29%
             |             
            
                57.90
             |           
            
                59.70
             |               
            
                57.80
             |                           
            
                59.70
             | 
            
                58.80
             |                     
            
                53.75
             |                                 
            
                133,600
             |            
            
                 
             |                                       
         
    
        
            | 
                1/11/2021
             | 
            
                +0.60 / +1.05%
             |             
            
                57.20
             |           
            
                57.90
             |               
            
                57.20
             |                           
            
                57.80
             | 
            
                57.67
             |                     
            
                52.04
             |                                 
            
                62,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/8/2021
             | 
            
                +0.20 / +0.35%
             |             
            
                57.40
             |           
            
                57.90
             |               
            
                57.10
             |                           
            
                57.20
             | 
            
                57.44
             |                     
            
                51.50
             |                                 
            
                106,400
             |            
            
                 
             |                                       
         
    
        
            | 
                1/7/2021
             | 
            
                -0.20 / -0.35%
             |             
            
                57.00
             |           
            
                57.20
             |               
            
                55.90
             |                           
            
                57.00
             | 
            
                56.78
             |                     
            
                51.32
             |                                 
            
                33,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/6/2021
             | 
            
                0.00 / 0.00%
             |             
            
                56.80
             |           
            
                57.30
             |               
            
                56.70
             |                           
            
                57.20
             | 
            
                57.12
             |                     
            
                51.50
             |                                 
            
                92,100
             |            
            
                 
             |                                       
         
    
        
            | 
                1/5/2021
             | 
            
                -0.10 / -0.17%
             |             
            
                57.30
             |           
            
                57.30
             |               
            
                56.90
             |                           
            
                57.20
             | 
            
                57.30
             |                     
            
                51.50
             |                                 
            
                44,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/4/2021
             | 
            
                -0.10 / -0.17%
             |             
            
                57.10
             |           
            
                57.70
             |               
            
                57.10
             |                           
            
                57.30
             | 
            
                57.28
             |                     
            
                51.59
             |                                 
            
                55,500
             |            
            
                 
             |                                       
         
    
        
            | 
                12/31/2020
             | 
            
                -0.10 / -0.17%
             |             
            
                57.50
             |           
            
                57.50
             |               
            
                56.60
             |                           
            
                57.40
             | 
            
                57.06
             |                     
            
                51.68
             |                                 
            
                28,860
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/30/2020
             | 
            
                +1.20 / +2.13%
             |             
            
                57.90
             |           
            
                58.00
             |               
            
                56.80
             |                           
            
                57.50
             | 
            
                57.29
             |                     
            
                51.77
             |                                 
            
                131,870
             |            
            
                 
             |                                       
         
    
        
            | 
                12/29/2020
             | 
            
                +1.10 / +1.99%
             |             
            
                55.20
             |           
            
                56.50
             |               
            
                54.90
             |                           
            
                56.30
             | 
            
                55.59
             |                     
            
                50.69
             |                                 
            
                112,050
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/28/2020
             | 
            
                -0.10 / -0.18%
             |             
            
                55.80
             |           
            
                55.80
             |               
            
                55.10
             |                           
            
                55.20
             | 
            
                55.28
             |                     
            
                49.70
             |                                 
            
                43,910
             |            
            
                 
             |                                       
         
    
        
            | 
                12/25/2020
             | 
            
                +0.30 / +0.55%
             |             
            
                54.60
             |           
            
                55.30
             |               
            
                54.60
             |                           
            
                55.30
             | 
            
                55.08
             |                     
            
                49.79
             |                                 
            
                40,370
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/24/2020
             | 
            
                0.00 / 0.00%
             |             
            
                55.00
             |           
            
                55.40
             |               
            
                54.20
             |                           
            
                55.00
             | 
            
                54.87
             |                     
            
                49.52
             |                                 
            
                88,060
             |            
            
                 
             |                                       
         
    
        
            | 
                12/23/2020
             | 
            
                -0.30 / -0.54%
             |             
            
                55.40
             |           
            
                55.90
             |               
            
                54.90
             |                           
            
                55.00
             | 
            
                55.30
             |                     
            
                49.52
             |                                 
            
                98,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/22/2020
             | 
            
                0.00 / 0.00%
             |             
            
                55.00
             |           
            
                55.60
             |               
            
                54.70
             |                           
            
                55.30
             | 
            
                54.96
             |                     
            
                49.79
             |                                 
            
                119,020
             |            
            
                 
             |                                       
         
    
        
            | 
                12/21/2020
             | 
            
                -0.50 / -0.90%
             |             
            
                55.80
             |           
            
                56.20
             |               
            
                55.30
             |                           
            
                55.30
             | 
            
                55.74
             |                     
            
                49.79
             |                                 
            
                147,680
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/18/2020
             | 
            
                +0.20 / +0.36%
             |             
            
                55.50
             |           
            
                56.00
             |               
            
                55.50
             |                           
            
                55.80
             | 
            
                55.71
             |                     
            
                50.24
             |                                 
            
                65,370
             |            
            
                 
             |                                       
         
    
        
            | 
                12/17/2020
             | 
            
                -1.00 / -1.77%
             |             
            
                56.60
             |           
            
                56.60
             |               
            
                55.60
             |                           
            
                55.60
             | 
            
                55.97
             |                     
            
                50.06
             |                                 
            
                120,740
             |  
            
                 
             |                                                              
             
    
         
    
    
 |