| 
                 
                    Closing price on 3/10/2021
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    63.50 | 
                 
                
                    | High | 
                    63.80 | 
                 
                
                    | Low | 
                    62.50 | 
                     
                
                    | Volume | 
                    162,100 | 
                                 
                
                    | Split-adjusted Price | 
                    57.26 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
AST Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                3/10/2021
             | 
            
                +0.10 / +0.16%
             |             
            
                63.50
             |           
            
                63.80
             |               
            
                62.50
             |                           
            
                63.60
             | 
            
                63.47
             |                     
            
                57.26
             |                                 
            
                162,100
             |            
            
                 
             |                                       
         
    
        
            | 
                3/9/2021
             | 
            
                -0.60 / -0.94%
             |             
            
                64.10
             |           
            
                64.10
             |               
            
                63.40
             |                           
            
                63.50
             | 
            
                63.63
             |                     
            
                57.17
             |                                 
            
                38,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/8/2021
             | 
            
                -0.50 / -0.77%
             |             
            
                66.50
             |           
            
                66.50
             |               
            
                64.10
             |                           
            
                64.10
             | 
            
                64.54
             |                     
            
                57.71
             |                                 
            
                63,700
             |            
            
                 
             |                                       
         
    
        
            | 
                3/5/2021
             | 
            
                -1.00 / -1.52%
             |             
            
                64.10
             |           
            
                65.40
             |               
            
                64.00
             |                           
            
                64.60
             | 
            
                64.53
             |                     
            
                58.16
             |                                 
            
                56,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/4/2021
             | 
            
                +0.40 / +0.61%
             |             
            
                65.00
             |           
            
                66.70
             |               
            
                65.00
             |                           
            
                65.60
             | 
            
                65.20
             |                     
            
                59.06
             |                                 
            
                127,900
             |            
            
                 
             |                                       
         
    
        
            | 
                3/3/2021
             | 
            
                +1.20 / +1.88%
             |             
            
                64.00
             |           
            
                65.70
             |               
            
                64.00
             |                           
            
                65.20
             | 
            
                65.31
             |                     
            
                58.70
             |                                 
            
                151,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/2/2021
             | 
            
                +0.10 / +0.16%
             |             
            
                64.00
             |           
            
                65.30
             |               
            
                64.00
             |                           
            
                64.00
             | 
            
                64.00
             |                     
            
                57.62
             |                                 
            
                156,000
             |            
            
                 
             |                                       
         
    
        
            | 
                3/1/2021
             | 
            
                0.00 / 0.00%
             |             
            
                63.90
             |           
            
                65.50
             |               
            
                63.90
             |                           
            
                63.90
             | 
            
                64.60
             |                     
            
                57.53
             |                                 
            
                89,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/26/2021
             | 
            
                +0.90 / +1.43%
             |             
            
                62.50
             |           
            
                64.50
             |               
            
                62.50
             |                           
            
                63.90
             | 
            
                63.62
             |                     
            
                57.53
             |                                 
            
                51,300
             |            
            
                 
             |                                       
         
    
        
            | 
                2/25/2021
             | 
            
                +1.00 / +1.61%
             |             
            
                63.00
             |           
            
                63.90
             |               
            
                62.10
             |                           
            
                63.00
             | 
            
                62.78
             |                     
            
                56.72
             |                                 
            
                56,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/24/2021
             | 
            
                -1.30 / -2.05%
             |             
            
                65.00
             |           
            
                65.00
             |               
            
                62.00
             |                           
            
                62.00
             | 
            
                63.73
             |                     
            
                55.82
             |                                 
            
                117,400
             |            
            
                 
             |                                       
         
    
        
            | 
                2/23/2021
             | 
            
                +1.80 / +2.93%
             |             
            
                62.00
             |           
            
                65.00
             |               
            
                62.00
             |                           
            
                63.30
             | 
            
                63.26
             |                     
            
                56.99
             |                                 
            
                208,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/22/2021
             | 
            
                +1.10 / +1.82%
             |             
            
                60.00
             |           
            
                61.60
             |               
            
                58.90
             |                           
            
                61.50
             | 
            
                60.40
             |                     
            
                55.37
             |                                 
            
                90,800
             |            
            
                 
             |                                       
         
    
        
            | 
                2/19/2021
             | 
            
                +0.20 / +0.33%
             |             
            
                60.20
             |           
            
                60.40
             |               
            
                58.70
             |                           
            
                60.40
             | 
            
                60.21
             |                     
            
                54.38
             |                                 
            
                62,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/18/2021
             | 
            
                +0.70 / +1.18%
             |             
            
                59.90
             |           
            
                61.00
             |               
            
                58.50
             |                           
            
                60.20
             | 
            
                59.91
             |                     
            
                54.20
             |                                 
            
                45,300
             |            
            
                 
             |                                       
         
    
        
            | 
                2/17/2021
             | 
            
                +1.00 / +1.71%
             |             
            
                58.00
             |           
            
                59.60
             |               
            
                57.80
             |                           
            
                59.50
             | 
            
                59.09
             |                     
            
                53.57
             |                                 
            
                48,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/9/2021
             | 
            
                +1.00 / +1.74%
             |             
            
                57.50
             |           
            
                58.50
             |               
            
                56.90
             |                           
            
                58.50
             | 
            
                57.58
             |                     
            
                52.67
             |                                 
            
                105,500
             |            
            
                 
             |                                       
         
    
        
            | 
                2/8/2021
             | 
            
                -1.10 / -1.88%
             |             
            
                57.00
             |           
            
                57.90
             |               
            
                57.00
             |                           
            
                57.50
             | 
            
                57.37
             |                     
            
                51.77
             |                                 
            
                54,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/5/2021
             | 
            
                +0.60 / +1.03%
             |             
            
                58.00
             |           
            
                58.60
             |               
            
                58.00
             |                           
            
                58.60
             | 
            
                58.28
             |                     
            
                52.76
             |                                 
            
                30,500
             |            
            
                 
             |                                       
         
    
        
            | 
                2/4/2021
             | 
            
                +1.00 / +1.75%
             |             
            
                57.00
             |           
            
                58.20
             |               
            
                57.00
             |                           
            
                58.00
             | 
            
                57.59
             |                     
            
                52.22
             |                                 
            
                76,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/3/2021
             | 
            
                +0.30 / +0.53%
             |             
            
                57.30
             |           
            
                57.30
             |               
            
                55.50
             |                           
            
                57.00
             | 
            
                56.52
             |                     
            
                51.32
             |                                 
            
                55,800
             |            
            
                 
             |                                       
         
    
        
            | 
                2/2/2021
             | 
            
                +0.70 / +1.25%
             |             
            
                54.20
             |           
            
                57.50
             |               
            
                54.20
             |                           
            
                56.70
             | 
            
                55.15
             |                     
            
                51.05
             |                                 
            
                47,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/1/2021
             | 
            
                -2.50 / -4.27%
             |             
            
                57.50
             |           
            
                58.50
             |               
            
                55.30
             |                           
            
                56.00
             | 
            
                56.65
             |                     
            
                50.42
             |                                 
            
                105,900
             |            
            
                 
             |                                       
         
    
        
            | 
                1/29/2021
             | 
            
                +1.70 / +2.99%
             |             
            
                52.90
             |           
            
                59.30
             |               
            
                52.90
             |                           
            
                58.50
             | 
            
                55.78
             |                     
            
                52.67
             |                                 
            
                167,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                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
             |  
            
                 
             |                                                              
             
    
         
    
    
 |