| 
                 
                    Closing price on 5/26/2021
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    48.50 | 
                 
                
                    | High | 
                    48.50 | 
                 
                
                    | Low | 
                    47.85 | 
                     
                
                    | Volume | 
                    61,800 | 
                                 
                
                    | Split-adjusted Price | 
                    43.12 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
AST Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                5/26/2021
             | 
            
                -0.70 / -1.44%
             |             
            
                48.50
             |           
            
                48.50
             |               
            
                47.85
             |                           
            
                47.90
             | 
            
                48.07
             |                     
            
                43.12
             |                                 
            
                61,800
             |            
            
                 
             |                                       
         
    
        
            | 
                5/25/2021
             | 
            
                -1.40 / -2.80%
             |             
            
                50.00
             |           
            
                50.00
             |               
            
                48.60
             |                           
            
                48.60
             | 
            
                49.27
             |                     
            
                43.75
             |                                 
            
                34,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/24/2021
             | 
            
                +0.10 / +0.20%
             |             
            
                48.00
             |           
            
                50.00
             |               
            
                48.00
             |                           
            
                50.00
             | 
            
                49.77
             |                     
            
                45.01
             |                                 
            
                101,800
             |            
            
                 
             |                                       
         
    
        
            | 
                5/21/2021
             | 
            
                0.00 / 0.00%
             |             
            
                49.90
             |           
            
                50.20
             |               
            
                49.00
             |                           
            
                49.90
             | 
            
                49.87
             |                     
            
                44.92
             |                                 
            
                77,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/20/2021
             | 
            
                +1.40 / +2.89%
             |             
            
                48.70
             |           
            
                51.00
             |               
            
                48.60
             |                           
            
                49.90
             | 
            
                50.02
             |                     
            
                44.92
             |                                 
            
                165,200
             |            
            
                 
             |                                       
         
    
        
            | 
                5/19/2021
             | 
            
                +2.50 / +5.43%
             |             
            
                45.60
             |           
            
                49.00
             |               
            
                45.60
             |                           
            
                48.50
             | 
            
                47.87
             |                     
            
                43.66
             |                                 
            
                43,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/18/2021
             | 
            
                -2.20 / -4.56%
             |             
            
                48.20
             |           
            
                48.40
             |               
            
                45.80
             |                           
            
                46.00
             | 
            
                45.80
             |                     
            
                41.41
             |                                 
            
                168,000
             |            
            
                 
             |                                       
         
    
        
            | 
                5/17/2021
             | 
            
                -2.80 / -5.49%
             |             
            
                50.80
             |           
            
                50.90
             |               
            
                48.00
             |                           
            
                48.20
             | 
            
                48.00
             |                     
            
                43.39
             |                                 
            
                117,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/14/2021
             | 
            
                -0.20 / -0.39%
             |             
            
                52.00
             |           
            
                52.00
             |               
            
                51.00
             |                           
            
                51.00
             | 
            
                51.19
             |                     
            
                45.91
             |                                 
            
                22,800
             |            
            
                 
             |                                       
         
    
        
            | 
                5/13/2021
             | 
            
                -0.60 / -1.16%
             |             
            
                51.70
             |           
            
                51.70
             |               
            
                51.00
             |                           
            
                51.20
             | 
            
                51.26
             |                     
            
                46.09
             |                                 
            
                9,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/12/2021
             | 
            
                +0.80 / +1.57%
             |             
            
                51.00
             |           
            
                51.80
             |               
            
                50.90
             |                           
            
                51.80
             | 
            
                51.10
             |                     
            
                46.63
             |                                 
            
                30,200
             |            
            
                 
             |                                       
         
    
        
            | 
                5/11/2021
             | 
            
                +0.40 / +0.79%
             |             
            
                50.30
             |           
            
                51.20
             |               
            
                50.30
             |                           
            
                51.00
             | 
            
                50.77
             |                     
            
                45.91
             |                                 
            
                20,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/10/2021
             | 
            
                -1.30 / -2.50%
             |             
            
                51.90
             |           
            
                51.90
             |               
            
                50.10
             |                           
            
                50.60
             | 
            
                50.84
             |                     
            
                45.55
             |                                 
            
                52,900
             |            
            
                 
             |                                       
         
    
        
            | 
                5/7/2021
             | 
            
                -1.60 / -2.99%
             |             
            
                53.10
             |           
            
                53.40
             |               
            
                51.00
             |                           
            
                51.90
             | 
            
                52.30
             |                     
            
                46.72
             |                                 
            
                37,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/6/2021
             | 
            
                -0.70 / -1.29%
             |             
            
                53.80
             |           
            
                54.00
             |               
            
                53.50
             |                           
            
                53.50
             | 
            
                54.00
             |                     
            
                48.16
             |                                 
            
                25,700
             |            
            
                 
             |                                       
         
    
        
            | 
                5/5/2021
             | 
            
                -0.80 / -1.45%
             |             
            
                55.00
             |           
            
                55.00
             |               
            
                54.00
             |                           
            
                54.20
             | 
            
                54.53
             |                     
            
                48.80
             |                                 
            
                15,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/4/2021
             | 
            
                -0.40 / -0.72%
             |             
            
                52.00
             |           
            
                55.10
             |               
            
                52.00
             |                           
            
                55.00
             | 
            
                54.27
             |                     
            
                49.52
             |                                 
            
                100,800
             |            
            
                 
             |                                       
         
    
        
            | 
                4/29/2021
             | 
            
                +1.40 / +2.59%
             |             
            
                54.10
             |           
            
                55.50
             |               
            
                54.00
             |                           
            
                55.40
             | 
            
                54.78
             |                     
            
                49.88
             |                                 
            
                27,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                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
             |  
            
                 
             |                                                              
             
    
         
    
    
 |