| 
                 
                    Closing price on 6/24/2019
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    66.50 | 
                 
                
                    | High | 
                    66.50 | 
                 
                
                    | Low | 
                    66.00 | 
                     
                
                    | Volume | 
                    64,260 | 
                                 
                
                    | Split-adjusted Price | 
                    56.46 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
AST Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                6/24/2019
             | 
            
                -0.40 / -0.60%
             |             
            
                66.50
             |           
            
                66.50
             |               
            
                66.00
             |                           
            
                66.00
             | 
            
                66.29
             |                     
            
                56.46
             |                                 
            
                64,260
             |            
            
                 
             |                                       
         
    
        
            | 
                6/21/2019
             | 
            
                -0.20 / -0.30%
             |             
            
                66.60
             |           
            
                67.00
             |               
            
                65.90
             |                           
            
                66.40
             | 
            
                66.44
             |                     
            
                56.80
             |                                 
            
                63,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/20/2019
             | 
            
                +1.60 / +2.46%
             |             
            
                65.10
             |           
            
                67.00
             |               
            
                65.00
             |                           
            
                66.60
             | 
            
                65.74
             |                     
            
                56.97
             |                                 
            
                148,020
             |            
            
                 
             |                                       
         
    
        
            | 
                6/19/2019
             | 
            
                -0.40 / -0.61%
             |             
            
                65.40
             |           
            
                65.60
             |               
            
                65.00
             |                           
            
                65.00
             | 
            
                65.39
             |                     
            
                55.60
             |                                 
            
                65,840
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/18/2019
             | 
            
                -0.40 / -0.61%
             |             
            
                65.80
             |           
            
                66.00
             |               
            
                65.40
             |                           
            
                65.40
             | 
            
                65.69
             |                     
            
                55.94
             |                                 
            
                73,660
             |            
            
                 
             |                                       
         
    
        
            | 
                6/17/2019
             | 
            
                -1.40 / -2.08%
             |             
            
                67.20
             |           
            
                67.30
             |               
            
                65.30
             |                           
            
                65.80
             | 
            
                66.04
             |                     
            
                56.28
             |                                 
            
                260,540
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/14/2019
             | 
            
                0.00 / 0.00%
             |             
            
                67.20
             |           
            
                67.20
             |               
            
                66.00
             |                           
            
                67.20
             | 
            
                66.86
             |                     
            
                57.48
             |                                 
            
                97,410
             |            
            
                 
             |                                       
         
    
        
            | 
                6/13/2019
             | 
            
                +2.20 / +3.38%
             |             
            
                65.20
             |           
            
                67.20
             |               
            
                65.20
             |                           
            
                67.20
             | 
            
                66.16
             |                     
            
                57.48
             |                                 
            
                213,970
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/12/2019
             | 
            
                +1.00 / +1.56%
             |             
            
                64.20
             |           
            
                65.00
             |               
            
                64.20
             |                           
            
                65.00
             | 
            
                64.68
             |                     
            
                55.60
             |                                 
            
                185,660
             |            
            
                 
             |                                       
         
    
        
            | 
                6/11/2019
             | 
            
                +0.10 / +0.16%
             |             
            
                64.00
             |           
            
                64.50
             |               
            
                64.00
             |                           
            
                64.00
             | 
            
                64.18
             |                     
            
                54.74
             |                                 
            
                82,150
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/10/2019
             | 
            
                +0.80 / +1.27%
             |             
            
                63.30
             |           
            
                63.90
             |               
            
                63.20
             |                           
            
                63.90
             | 
            
                63.34
             |                     
            
                54.66
             |                                 
            
                840,910
             |            
            
                 
             |                                       
         
    
        
            | 
                6/7/2019
             | 
            
                0.00 / 0.00%
             |             
            
                63.20
             |           
            
                63.20
             |               
            
                62.80
             |                           
            
                63.10
             | 
            
                63.01
             |                     
            
                53.97
             |                                 
            
                80,070
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/6/2019
             | 
            
                0.00 / 0.00%
             |             
            
                63.10
             |           
            
                63.10
             |               
            
                62.70
             |                           
            
                63.10
             | 
            
                62.99
             |                     
            
                53.97
             |                                 
            
                276,740
             |            
            
                 
             |                                       
         
    
        
            | 
                6/5/2019
             | 
            
                +0.10 / +0.16%
             |             
            
                63.20
             |           
            
                63.50
             |               
            
                62.80
             |                           
            
                63.10
             | 
            
                63.11
             |                     
            
                53.97
             |                                 
            
                204,370
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/4/2019
             | 
            
                +1.70 / +2.77%
             |             
            
                61.50
             |           
            
                63.00
             |               
            
                61.20
             |                           
            
                63.00
             | 
            
                61.59
             |                     
            
                53.89
             |                                 
            
                696,920
             |            
            
                 
             |                                       
         
    
        
            | 
                6/3/2019
             | 
            
                +0.30 / +0.49%
             |             
            
                61.00
             |           
            
                61.30
             |               
            
                60.70
             |                           
            
                61.30
             | 
            
                60.96
             |                     
            
                52.43
             |                                 
            
                99,340
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/31/2019
             | 
            
                0.00 / 0.00%
             |             
            
                60.80
             |           
            
                61.00
             |               
            
                60.70
             |                           
            
                61.00
             | 
            
                60.83
             |                     
            
                52.18
             |                                 
            
                163,950
             |            
            
                 
             |                                       
         
    
        
            | 
                5/30/2019
             | 
            
                -0.40 / -0.65%
             |             
            
                61.40
             |           
            
                61.40
             |               
            
                60.90
             |                           
            
                61.00
             | 
            
                61.09
             |                     
            
                52.18
             |                                 
            
                94,940
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/29/2019
             | 
            
                -0.30 / -0.49%
             |             
            
                61.70
             |           
            
                61.70
             |               
            
                61.10
             |                           
            
                61.40
             | 
            
                61.31
             |                     
            
                52.52
             |                                 
            
                80,430
             |            
            
                 
             |                                       
         
    
        
            | 
                5/28/2019
             | 
            
                +0.20 / +0.33%
             |             
            
                61.50
             |           
            
                61.70
             |               
            
                61.20
             |                           
            
                61.70
             | 
            
                61.33
             |                     
            
                52.78
             |                                 
            
                148,090
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/27/2019
             | 
            
                -1.00 / -1.60%
             |             
            
                62.50
             |           
            
                62.70
             |               
            
                61.20
             |                           
            
                61.50
             | 
            
                61.98
             |                     
            
                52.61
             |                                 
            
                95,230
             |            
            
                 
             |                                       
         
    
        
            | 
                5/24/2019
             | 
            
                -0.50 / -0.79%
             |             
            
                62.90
             |           
            
                63.00
             |               
            
                62.30
             |                           
            
                62.50
             | 
            
                62.66
             |                     
            
                53.46
             |                                 
            
                70,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/23/2019
             | 
            
                -0.30 / -0.47%
             |             
            
                63.30
             |           
            
                63.30
             |               
            
                62.90
             |                           
            
                63.00
             | 
            
                62.98
             |                     
            
                53.89
             |                                 
            
                70,050
             |            
            
                 
             |                                       
         
    
        
            | 
                5/22/2019
             | 
            
                +0.10 / +0.16%
             |             
            
                63.50
             |           
            
                63.70
             |               
            
                63.00
             |                           
            
                63.30
             | 
            
                63.29
             |                     
            
                54.15
             |                                 
            
                91,810
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/21/2019
             | 
            
                +3.00 / +4.98%
             |             
            
                60.30
             |           
            
                63.40
             |               
            
                60.30
             |                           
            
                63.20
             | 
            
                62.22
             |                     
            
                54.06
             |                                 
            
                140,480
             |            
            
                 
             |                                       
         
    
        
            | 
                5/20/2019
             | 
            
                +0.80 / +1.35%
             |             
            
                60.00
             |           
            
                60.30
             |               
            
                59.50
             |                           
            
                60.20
             | 
            
                60.13
             |                     
            
                51.49
             |                                 
            
                91,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/17/2019
             | 
            
                0.00 / 0.00%
             |             
            
                74.20
             |           
            
                74.30
             |               
            
                74.00
             |                           
            
                74.20
             | 
            
                74.13
             |                     
            
                50.78
             |                                 
            
                80,290
             |            
            
                 
             |                                       
         
    
        
            | 
                5/16/2019
             | 
            
                -0.10 / -0.13%
             |             
            
                74.40
             |           
            
                74.40
             |               
            
                74.00
             |                           
            
                74.20
             | 
            
                74.20
             |                     
            
                50.78
             |                                 
            
                72,720
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/15/2019
             | 
            
                +0.30 / +0.41%
             |             
            
                74.20
             |           
            
                74.70
             |               
            
                74.20
             |                           
            
                74.30
             | 
            
                74.55
             |                     
            
                50.84
             |                                 
            
                80,790
             |            
            
                 
             |                                       
         
    
        
            | 
                5/14/2019
             | 
            
                -1.00 / -1.33%
             |             
            
                75.20
             |           
            
                75.20
             |               
            
                74.00
             |                           
            
                74.00
             | 
            
                74.75
             |                     
            
                50.64
             |                                 
            
                80,370
             |  
            
                 
             |                                                              
             
    
         
    
    
 |