| 
                 
                    Closing price on 4/28/2021
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    53.50 | 
                 
                
                    | High | 
                    54.80 | 
                 
                
                    | Low | 
                    53.20 | 
                     
                
                    | Volume | 
                    74,100 | 
                                 
                
                    | Split-adjusted Price | 
                    48.62 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
AST Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                4/28/2021
             | 
            
                0.00 / 0.00%
             |             
            
                53.50
             |           
            
                54.80
             |               
            
                53.20
             |                           
            
                54.00
             | 
            
                54.00
             |                     
            
                48.62
             |                                 
            
                74,100
             |            
            
                 
             |                                       
         
    
        
            | 
                4/27/2021
             | 
            
                -0.60 / -1.10%
             |             
            
                54.60
             |           
            
                54.60
             |               
            
                53.00
             |                           
            
                54.00
             | 
            
                53.66
             |                     
            
                48.62
             |                                 
            
                37,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/26/2021
             | 
            
                -1.40 / -2.50%
             |             
            
                56.00
             |           
            
                56.10
             |               
            
                54.50
             |                           
            
                54.60
             | 
            
                54.96
             |                     
            
                49.16
             |                                 
            
                27,900
             |            
            
                 
             |                                       
         
    
        
            | 
                4/23/2021
             | 
            
                +0.50 / +0.90%
             |             
            
                56.00
             |           
            
                56.00
             |               
            
                55.00
             |                           
            
                56.00
             | 
            
                55.71
             |                     
            
                50.42
             |                                 
            
                31,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/22/2021
             | 
            
                -1.70 / -2.97%
             |             
            
                57.20
             |           
            
                57.40
             |               
            
                55.50
             |                           
            
                55.50
             | 
            
                56.73
             |                     
            
                49.97
             |                                 
            
                62,900
             |            
            
                 
             |                                       
         
    
        
            | 
                4/20/2021
             | 
            
                +0.20 / +0.35%
             |             
            
                57.00
             |           
            
                59.00
             |               
            
                57.00
             |                           
            
                57.20
             | 
            
                57.41
             |                     
            
                51.50
             |                                 
            
                47,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/19/2021
             | 
            
                -0.50 / -0.87%
             |             
            
                57.50
             |           
            
                58.50
             |               
            
                57.00
             |                           
            
                57.00
             | 
            
                57.59
             |                     
            
                51.32
             |                                 
            
                49,600
             |            
            
                 
             |                                       
         
    
        
            | 
                4/16/2021
             | 
            
                -1.40 / -2.38%
             |             
            
                58.90
             |           
            
                59.20
             |               
            
                56.90
             |                           
            
                57.50
             | 
            
                57.75
             |                     
            
                51.77
             |                                 
            
                48,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/15/2021
             | 
            
                -0.70 / -1.17%
             |             
            
                59.10
             |           
            
                59.60
             |               
            
                58.80
             |                           
            
                58.90
             | 
            
                59.60
             |                     
            
                53.03
             |                                 
            
                54,500
             |            
            
                 
             |                                       
         
    
        
            | 
                4/14/2021
             | 
            
                -0.30 / -0.50%
             |             
            
                59.20
             |           
            
                59.60
             |               
            
                59.10
             |                           
            
                59.60
             | 
            
                59.60
             |                     
            
                53.66
             |                                 
            
                52,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/13/2021
             | 
            
                -0.50 / -0.83%
             |             
            
                60.40
             |           
            
                60.60
             |               
            
                59.50
             |                           
            
                59.90
             | 
            
                60.11
             |                     
            
                53.93
             |                                 
            
                34,700
             |            
            
                 
             |                                       
         
    
        
            | 
                4/12/2021
             | 
            
                -1.30 / -2.11%
             |             
            
                61.50
             |           
            
                61.50
             |               
            
                60.30
             |                           
            
                60.40
             | 
            
                60.40
             |                     
            
                54.38
             |                                 
            
                42,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/9/2021
             | 
            
                -0.10 / -0.16%
             |             
            
                61.80
             |           
            
                61.80
             |               
            
                60.50
             |                           
            
                61.70
             | 
            
                60.96
             |                     
            
                55.55
             |                                 
            
                14,900
             |            
            
                 
             |                                       
         
    
        
            | 
                4/8/2021
             | 
            
                +0.30 / +0.49%
             |             
            
                62.00
             |           
            
                62.00
             |               
            
                61.50
             |                           
            
                61.80
             | 
            
                61.75
             |                     
            
                55.64
             |                                 
            
                22,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/7/2021
             | 
            
                +1.00 / +1.65%
             |             
            
                60.90
             |           
            
                62.00
             |               
            
                60.50
             |                           
            
                61.50
             | 
            
                61.20
             |                     
            
                55.37
             |                                 
            
                17,500
             |            
            
                 
             |                                       
         
    
        
            | 
                4/6/2021
             | 
            
                0.00 / 0.00%
             |             
            
                60.50
             |           
            
                60.80
             |               
            
                60.00
             |                           
            
                60.50
             | 
            
                60.37
             |                     
            
                54.47
             |                                 
            
                28,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/5/2021
             | 
            
                -1.70 / -2.73%
             |             
            
                62.30
             |           
            
                62.30
             |               
            
                60.50
             |                           
            
                60.50
             | 
            
                62.20
             |                     
            
                54.47
             |                                 
            
                34,300
             |            
            
                 
             |                                       
         
    
        
            | 
                4/2/2021
             | 
            
                +0.20 / +0.32%
             |             
            
                62.00
             |           
            
                62.50
             |               
            
                61.60
             |                           
            
                62.20
             | 
            
                62.06
             |                     
            
                56.00
             |                                 
            
                28,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/1/2021
             | 
            
                +0.50 / +0.81%
             |             
            
                60.50
             |           
            
                62.00
             |               
            
                60.50
             |                           
            
                62.00
             | 
            
                61.61
             |                     
            
                55.82
             |                                 
            
                37,800
             |            
            
                 
             |                                       
         
    
        
            | 
                3/31/2021
             | 
            
                -0.10 / -0.16%
             |             
            
                62.50
             |           
            
                62.50
             |               
            
                60.90
             |                           
            
                61.50
             | 
            
                61.52
             |                     
            
                55.37
             |                                 
            
                26,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/30/2021
             | 
            
                +1.60 / +2.67%
             |             
            
                60.00
             |           
            
                62.00
             |               
            
                60.00
             |                           
            
                61.60
             | 
            
                61.26
             |                     
            
                55.46
             |                                 
            
                35,200
             |            
            
                 
             |                                       
         
    
        
            | 
                3/29/2021
             | 
            
                +0.70 / +1.18%
             |             
            
                59.50
             |           
            
                60.50
             |               
            
                59.50
             |                           
            
                60.00
             | 
            
                60.04
             |                     
            
                54.02
             |                                 
            
                37,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/26/2021
             | 
            
                -0.70 / -1.17%
             |             
            
                59.10
             |           
            
                59.90
             |               
            
                58.50
             |                           
            
                59.30
             | 
            
                59.23
             |                     
            
                53.39
             |                                 
            
                55,200
             |            
            
                 
             |                                       
         
    
        
            | 
                3/25/2021
             | 
            
                -0.80 / -1.32%
             |             
            
                60.80
             |           
            
                60.80
             |               
            
                59.00
             |                           
            
                60.00
             | 
            
                60.80
             |                     
            
                54.02
             |                                 
            
                42,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/24/2021
             | 
            
                -0.20 / -0.33%
             |             
            
                60.50
             |           
            
                61.00
             |               
            
                60.00
             |                           
            
                60.80
             | 
            
                60.50
             |                     
            
                54.74
             |                                 
            
                42,100
             |            
            
                 
             |                                       
         
    
        
            | 
                3/23/2021
             | 
            
                -1.00 / -1.61%
             |             
            
                62.10
             |           
            
                62.10
             |               
            
                61.00
             |                           
            
                61.00
             | 
            
                61.61
             |                     
            
                54.92
             |                                 
            
                42,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/22/2021
             | 
            
                0.00 / 0.00%
             |             
            
                62.60
             |           
            
                62.90
             |               
            
                62.00
             |                           
            
                62.00
             | 
            
                62.40
             |                     
            
                55.82
             |                                 
            
                49,800
             |            
            
                 
             |                                       
         
    
        
            | 
                3/19/2021
             | 
            
                -0.30 / -0.48%
             |             
            
                62.30
             |           
            
                63.20
             |               
            
                62.00
             |                           
            
                62.00
             | 
            
                62.30
             |                     
            
                55.82
             |                                 
            
                51,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/18/2021
             | 
            
                0.00 / 0.00%
             |             
            
                62.40
             |           
            
                63.10
             |               
            
                62.30
             |                           
            
                62.30
             | 
            
                62.45
             |                     
            
                56.09
             |                                 
            
                23,600
             |            
            
                 
             |                                       
         
    
        
            | 
                3/17/2021
             | 
            
                -0.10 / -0.16%
             |             
            
                63.50
             |           
            
                63.50
             |               
            
                62.00
             |                           
            
                62.30
             | 
            
                62.34
             |                     
            
                56.09
             |                                 
            
                39,400
             |  
            
                 
             |                                                              
             
    
         
    
    
 |