| 
                 
                    Closing price on 6/6/2019
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    63.10 | 
                 
                
                    | High | 
                    63.10 | 
                 
                
                    | Low | 
                    62.70 | 
                     
                
                    | Volume | 
                    276,740 | 
                                 
                
                    | Split-adjusted Price | 
                    53.97 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
AST Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                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
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/13/2019
             | 
            
                -0.10 / -0.13%
             |             
            
                75.40
             |           
            
                75.40
             |               
            
                74.70
             |                           
            
                75.00
             | 
            
                75.01
             |                     
            
                51.32
             |                                 
            
                91,590
             |            
            
                 
             |                                       
         
    
        
            | 
                5/10/2019
             | 
            
                +0.10 / +0.13%
             |             
            
                75.20
             |           
            
                75.20
             |               
            
                74.80
             |                           
            
                75.10
             | 
            
                74.91
             |                     
            
                51.39
             |                                 
            
                80,310
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/9/2019
             | 
            
                -0.30 / -0.40%
             |             
            
                75.40
             |           
            
                75.60
             |               
            
                74.80
             |                           
            
                75.00
             | 
            
                75.22
             |                     
            
                51.32
             |                                 
            
                93,830
             |            
            
                 
             |                                       
         
    
        
            | 
                5/8/2019
             | 
            
                -0.30 / -0.40%
             |             
            
                75.60
             |           
            
                75.60
             |               
            
                75.00
             |                           
            
                75.30
             | 
            
                75.37
             |                     
            
                51.53
             |                                 
            
                82,610
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/7/2019
             | 
            
                +0.60 / +0.80%
             |             
            
                75.20
             |           
            
                75.60
             |               
            
                75.00
             |                           
            
                75.60
             | 
            
                75.33
             |                     
            
                51.73
             |                                 
            
                96,700
             |            
            
                 
             |                                       
         
    
        
            | 
                5/6/2019
             | 
            
                -0.20 / -0.27%
             |             
            
                75.20
             |           
            
                75.20
             |               
            
                75.00
             |                           
            
                75.00
             | 
            
                75.03
             |                     
            
                51.32
             |                                 
            
                108,120
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/3/2019
             | 
            
                -0.20 / -0.27%
             |             
            
                75.60
             |           
            
                75.60
             |               
            
                74.90
             |                           
            
                75.20
             | 
            
                75.12
             |                     
            
                51.46
             |                                 
            
                90,470
             |            
            
                 
             |                                       
         
    
        
            | 
                5/2/2019
             | 
            
                0.00 / 0.00%
             |             
            
                75.40
             |           
            
                75.50
             |               
            
                75.00
             |                           
            
                75.40
             | 
            
                75.20
             |                     
            
                51.60
             |                                 
            
                106,840
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/26/2019
             | 
            
                +0.40 / +0.53%
             |             
            
                75.00
             |           
            
                75.40
             |               
            
                75.00
             |                           
            
                75.40
             | 
            
                75.07
             |                     
            
                51.60
             |                                 
            
                235,950
             |            
            
                 
             |                                       
         
    
        
            | 
                4/25/2019
             | 
            
                -0.40 / -0.53%
             |             
            
                75.40
             |           
            
                75.40
             |               
            
                74.80
             |                           
            
                75.00
             | 
            
                74.90
             |                     
            
                51.32
             |                                 
            
                106,620
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/24/2019
             | 
            
                +0.10 / +0.13%
             |             
            
                75.30
             |           
            
                75.50
             |               
            
                74.90
             |                           
            
                75.40
             | 
            
                75.19
             |                     
            
                51.60
             |                                 
            
                100,950
             |            
            
                 
             |                                       
         
    
        
            | 
                4/23/2019
             | 
            
                0.00 / 0.00%
             |             
            
                75.30
             |           
            
                75.40
             |               
            
                74.90
             |                           
            
                75.30
             | 
            
                75.11
             |                     
            
                51.53
             |                                 
            
                108,310
             |  
            
                 
             |                                                              
             
    
         
    
    
 |