| 
                 
                    Closing price on 9/16/2019
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    67.10 | 
                 
                
                    | High | 
                    67.80 | 
                 
                
                    | Low | 
                    67.10 | 
                     
                
                    | Volume | 
                    90,580 | 
                                 
                
                    | Split-adjusted Price | 
                    57.82 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
AST Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                9/16/2019
             | 
            
                +0.50 / +0.75%
             |             
            
                67.10
             |           
            
                67.80
             |               
            
                67.10
             |                           
            
                67.60
             | 
            
                67.45
             |                     
            
                57.82
             |                                 
            
                90,580
             |            
            
                 
             |                                       
         
    
        
            | 
                9/13/2019
             | 
            
                +0.30 / +0.45%
             |             
            
                67.00
             |           
            
                67.10
             |               
            
                66.80
             |                           
            
                67.10
             | 
            
                66.97
             |                     
            
                57.40
             |                                 
            
                62,280
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/12/2019
             | 
            
                +0.40 / +0.60%
             |             
            
                66.40
             |           
            
                66.80
             |               
            
                66.00
             |                           
            
                66.80
             | 
            
                66.34
             |                     
            
                57.14
             |                                 
            
                67,060
             |            
            
                 
             |                                       
         
    
        
            | 
                9/11/2019
             | 
            
                +0.20 / +0.30%
             |             
            
                66.20
             |           
            
                66.60
             |               
            
                66.20
             |                           
            
                66.40
             | 
            
                66.30
             |                     
            
                56.80
             |                                 
            
                206,951
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/10/2019
             | 
            
                -1.20 / -1.78%
             |             
            
                67.40
             |           
            
                67.80
             |               
            
                65.60
             |                           
            
                66.20
             | 
            
                66.95
             |                     
            
                56.63
             |                                 
            
                82,670
             |            
            
                 
             |                                       
         
    
        
            | 
                9/9/2019
             | 
            
                -0.60 / -0.88%
             |             
            
                68.00
             |           
            
                68.00
             |               
            
                66.90
             |                           
            
                67.40
             | 
            
                67.49
             |                     
            
                57.65
             |                                 
            
                51,650
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/6/2019
             | 
            
                +0.20 / +0.29%
             |             
            
                68.20
             |           
            
                68.20
             |               
            
                67.80
             |                           
            
                68.00
             | 
            
                67.93
             |                     
            
                58.17
             |                                 
            
                4,408,049
             |            
            
                 
             |                                       
         
    
        
            | 
                9/5/2019
             | 
            
                +0.50 / +0.74%
             |             
            
                67.80
             |           
            
                67.80
             |               
            
                67.50
             |                           
            
                67.80
             | 
            
                67.65
             |                     
            
                57.99
             |                                 
            
                67,290
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/4/2019
             | 
            
                +1.60 / +2.44%
             |             
            
                66.00
             |           
            
                68.00
             |               
            
                65.90
             |                           
            
                67.30
             | 
            
                66.61
             |                     
            
                57.57
             |                                 
            
                137,010
             |            
            
                 
             |                                       
         
    
        
            | 
                9/3/2019
             | 
            
                +0.30 / +0.46%
             |             
            
                65.50
             |           
            
                66.20
             |               
            
                65.50
             |                           
            
                65.70
             | 
            
                65.75
             |                     
            
                56.20
             |                                 
            
                94,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/30/2019
             | 
            
                -0.10 / -0.15%
             |             
            
                65.50
             |           
            
                65.50
             |               
            
                64.10
             |                           
            
                65.40
             | 
            
                64.61
             |                     
            
                55.94
             |                                 
            
                140,620
             |            
            
                 
             |                                       
         
    
        
            | 
                8/29/2019
             | 
            
                -0.50 / -0.76%
             |             
            
                66.00
             |           
            
                66.00
             |               
            
                65.30
             |                           
            
                65.50
             | 
            
                65.69
             |                     
            
                56.03
             |                                 
            
                52,410
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/28/2019
             | 
            
                -0.90 / -1.35%
             |             
            
                66.90
             |           
            
                67.00
             |               
            
                65.40
             |                           
            
                66.00
             | 
            
                66.28
             |                     
            
                56.46
             |                                 
            
                72,770
             |            
            
                 
             |                                       
         
    
        
            | 
                8/27/2019
             | 
            
                -0.50 / -0.74%
             |             
            
                67.50
             |           
            
                67.50
             |               
            
                66.90
             |                           
            
                66.90
             | 
            
                67.26
             |                     
            
                57.23
             |                                 
            
                68,210
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/26/2019
             | 
            
                -0.30 / -0.44%
             |             
            
                67.70
             |           
            
                67.70
             |               
            
                67.00
             |                           
            
                67.40
             | 
            
                67.43
             |                     
            
                57.65
             |                                 
            
                53,510
             |            
            
                 
             |                                       
         
    
        
            | 
                8/23/2019
             | 
            
                -0.50 / -0.73%
             |             
            
                68.20
             |           
            
                68.40
             |               
            
                67.30
             |                           
            
                67.70
             | 
            
                67.86
             |                     
            
                57.91
             |                                 
            
                53,770
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/22/2019
             | 
            
                +0.80 / +1.19%
             |             
            
                68.40
             |           
            
                68.40
             |               
            
                67.30
             |                           
            
                68.20
             | 
            
                67.70
             |                     
            
                58.34
             |                                 
            
                87,120
             |            
            
                 
             |                                       
         
    
        
            | 
                8/21/2019
             | 
            
                +0.70 / +1.05%
             |             
            
                66.70
             |           
            
                67.40
             |               
            
                66.70
             |                           
            
                67.40
             | 
            
                66.85
             |                     
            
                57.65
             |                                 
            
                212,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/20/2019
             | 
            
                +0.50 / +0.76%
             |             
            
                66.50
             |           
            
                67.00
             |               
            
                66.30
             |                           
            
                66.70
             | 
            
                66.78
             |                     
            
                57.05
             |                                 
            
                50,270
             |            
            
                 
             |                                       
         
    
        
            | 
                8/19/2019
             | 
            
                +0.60 / +0.91%
             |             
            
                65.80
             |           
            
                66.20
             |               
            
                65.50
             |                           
            
                66.20
             | 
            
                65.82
             |                     
            
                56.63
             |                                 
            
                57,840
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/16/2019
             | 
            
                -0.40 / -0.61%
             |             
            
                66.00
             |           
            
                66.40
             |               
            
                65.50
             |                           
            
                65.60
             | 
            
                65.93
             |                     
            
                56.11
             |                                 
            
                59,470
             |            
            
                 
             |                                       
         
    
        
            | 
                8/15/2019
             | 
            
                -1.70 / -2.51%
             |             
            
                67.50
             |           
            
                67.50
             |               
            
                65.20
             |                           
            
                66.00
             | 
            
                65.96
             |                     
            
                56.46
             |                                 
            
                53,090
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/14/2019
             | 
            
                -0.40 / -0.59%
             |             
            
                68.10
             |           
            
                68.10
             |               
            
                67.40
             |                           
            
                67.70
             | 
            
                67.60
             |                     
            
                57.91
             |                                 
            
                55,130
             |            
            
                 
             |                                       
         
    
        
            | 
                8/13/2019
             | 
            
                +0.10 / +0.15%
             |             
            
                68.00
             |           
            
                68.20
             |               
            
                67.50
             |                           
            
                68.10
             | 
            
                67.88
             |                     
            
                58.25
             |                                 
            
                74,440
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/12/2019
             | 
            
                +1.00 / +1.49%
             |             
            
                67.00
             |           
            
                68.60
             |               
            
                66.80
             |                           
            
                68.00
             | 
            
                67.56
             |                     
            
                58.17
             |                                 
            
                142,120
             |            
            
                 
             |                                       
         
    
        
            | 
                8/9/2019
             | 
            
                -0.10 / -0.15%
             |             
            
                67.30
             |           
            
                67.30
             |               
            
                66.00
             |                           
            
                67.00
             | 
            
                66.90
             |                     
            
                57.31
             |                                 
            
                116,390
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/8/2019
             | 
            
                +1.00 / +1.51%
             |             
            
                66.00
             |           
            
                67.40
             |               
            
                65.50
             |                           
            
                67.10
             | 
            
                66.77
             |                     
            
                57.40
             |                                 
            
                133,810
             |            
            
                 
             |                                       
         
    
        
            | 
                8/7/2019
             | 
            
                +2.10 / +3.28%
             |             
            
                64.00
             |           
            
                66.60
             |               
            
                63.80
             |                           
            
                66.10
             | 
            
                65.52
             |                     
            
                56.54
             |                                 
            
                185,220
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/6/2019
             | 
            
                -0.40 / -0.62%
             |             
            
                64.20
             |           
            
                64.20
             |               
            
                63.00
             |                           
            
                64.00
             | 
            
                63.36
             |                     
            
                54.74
             |                                 
            
                77,220
             |            
            
                 
             |                                       
         
    
        
            | 
                8/5/2019
             | 
            
                -0.10 / -0.16%
             |             
            
                64.50
             |           
            
                64.60
             |               
            
                63.80
             |                           
            
                64.40
             | 
            
                64.30
             |                     
            
                55.09
             |                                 
            
                58,040
             |  
            
                 
             |                                                              
             
    
         
    
    
 |