| 
                 
                    Closing price on 3/4/2019
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    70.50 | 
                 
                
                    | High | 
                    71.20 | 
                 
                
                    | Low | 
                    70.50 | 
                     
                
                    | Volume | 
                    72,170 | 
                                 
                
                    | Split-adjusted Price | 
                    47.56 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
AST Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                3/4/2019
             | 
            
                +0.50 / +0.71%
             |             
            
                70.50
             |           
            
                71.20
             |               
            
                70.50
             |                           
            
                71.00
             | 
            
                70.75
             |                     
            
                47.56
             |                                 
            
                72,170
             |            
            
                 
             |                                       
         
    
        
            | 
                3/1/2019
             | 
            
                +0.30 / +0.43%
             |             
            
                70.30
             |           
            
                70.80
             |               
            
                70.00
             |                           
            
                70.50
             | 
            
                70.34
             |                     
            
                47.22
             |                                 
            
                61,050
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/28/2019
             | 
            
                -0.80 / -1.13%
             |             
            
                71.00
             |           
            
                71.20
             |               
            
                70.00
             |                           
            
                70.20
             | 
            
                70.77
             |                     
            
                47.02
             |                                 
            
                64,940
             |            
            
                 
             |                                       
         
    
        
            | 
                2/27/2019
             | 
            
                +0.50 / +0.71%
             |             
            
                70.50
             |           
            
                71.00
             |               
            
                70.50
             |                           
            
                71.00
             | 
            
                70.79
             |                     
            
                47.56
             |                                 
            
                65,040
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/26/2019
             | 
            
                +0.50 / +0.71%
             |             
            
                70.00
             |           
            
                70.50
             |               
            
                70.00
             |                           
            
                70.50
             | 
            
                70.26
             |                     
            
                47.22
             |                                 
            
                65,230
             |            
            
                 
             |                                       
         
    
        
            | 
                2/25/2019
             | 
            
                +0.60 / +0.86%
             |             
            
                69.20
             |           
            
                70.00
             |               
            
                69.20
             |                           
            
                70.00
             | 
            
                69.49
             |                     
            
                46.89
             |                                 
            
                77,160
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/22/2019
             | 
            
                +0.10 / +0.14%
             |             
            
                69.50
             |           
            
                69.50
             |               
            
                69.00
             |                           
            
                69.40
             | 
            
                69.20
             |                     
            
                46.49
             |                                 
            
                55,070
             |            
            
                 
             |                                       
         
    
        
            | 
                2/21/2019
             | 
            
                0.00 / 0.00%
             |             
            
                69.50
             |           
            
                69.50
             |               
            
                68.90
             |                           
            
                69.30
             | 
            
                69.23
             |                     
            
                46.42
             |                                 
            
                59,010
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/20/2019
             | 
            
                +0.30 / +0.43%
             |             
            
                69.30
             |           
            
                69.50
             |               
            
                69.10
             |                           
            
                69.30
             | 
            
                69.27
             |                     
            
                46.42
             |                                 
            
                66,000
             |            
            
                 
             |                                       
         
    
        
            | 
                2/19/2019
             | 
            
                +0.50 / +0.73%
             |             
            
                68.90
             |           
            
                69.00
             |               
            
                68.60
             |                           
            
                69.00
             | 
            
                68.80
             |                     
            
                46.22
             |                                 
            
                73,590
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/18/2019
             | 
            
                +0.90 / +1.33%
             |             
            
                67.60
             |           
            
                68.50
             |               
            
                67.60
             |                           
            
                68.50
             | 
            
                67.96
             |                     
            
                45.88
             |                                 
            
                81,500
             |            
            
                 
             |                                       
         
    
        
            | 
                2/15/2019
             | 
            
                -0.40 / -0.59%
             |             
            
                68.20
             |           
            
                68.50
             |               
            
                67.60
             |                           
            
                67.60
             | 
            
                67.96
             |                     
            
                45.28
             |                                 
            
                60,550
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/14/2019
             | 
            
                +1.00 / +1.49%
             |             
            
                67.30
             |           
            
                68.00
             |               
            
                67.00
             |                           
            
                68.00
             | 
            
                67.49
             |                     
            
                45.55
             |                                 
            
                78,080
             |            
            
                 
             |                                       
         
    
        
            | 
                2/13/2019
             | 
            
                +0.80 / +1.21%
             |             
            
                66.40
             |           
            
                67.00
             |               
            
                66.40
             |                           
            
                67.00
             | 
            
                66.77
             |                     
            
                44.88
             |                                 
            
                67,320
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/12/2019
             | 
            
                +0.70 / +1.07%
             |             
            
                65.50
             |           
            
                66.20
             |               
            
                65.30
             |                           
            
                66.20
             | 
            
                65.60
             |                     
            
                44.34
             |                                 
            
                69,770
             |            
            
                 
             |                                       
         
    
        
            | 
                2/11/2019
             | 
            
                +0.50 / +0.77%
             |             
            
                65.50
             |           
            
                65.50
             |               
            
                64.90
             |                           
            
                65.50
             | 
            
                65.19
             |                     
            
                43.87
             |                                 
            
                62,740
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/1/2019
             | 
            
                +0.70 / +1.09%
             |             
            
                64.50
             |           
            
                65.50
             |               
            
                64.50
             |                           
            
                65.00
             | 
            
                65.06
             |                     
            
                43.54
             |                                 
            
                63,300
             |            
            
                 
             |                                       
         
    
        
            | 
                1/31/2019
             | 
            
                +0.80 / +1.26%
             |             
            
                63.50
             |           
            
                64.50
             |               
            
                63.50
             |                           
            
                64.30
             | 
            
                64.18
             |                     
            
                43.07
             |                                 
            
                72,230
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/30/2019
             | 
            
                +0.50 / +0.79%
             |             
            
                62.80
             |           
            
                63.60
             |               
            
                62.80
             |                           
            
                63.50
             | 
            
                63.19
             |                     
            
                42.53
             |                                 
            
                61,020
             |            
            
                 
             |                                       
         
    
        
            | 
                1/29/2019
             | 
            
                0.00 / 0.00%
             |             
            
                63.00
             |           
            
                63.00
             |               
            
                62.70
             |                           
            
                63.00
             | 
            
                62.93
             |                     
            
                42.20
             |                                 
            
                60,350
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/28/2019
             | 
            
                0.00 / 0.00%
             |             
            
                63.00
             |           
            
                63.00
             |               
            
                62.60
             |                           
            
                63.00
             | 
            
                62.90
             |                     
            
                42.20
             |                                 
            
                66,260
             |            
            
                 
             |                                       
         
    
        
            | 
                1/25/2019
             | 
            
                +0.20 / +0.32%
             |             
            
                62.80
             |           
            
                64.00
             |               
            
                62.80
             |                           
            
                63.00
             | 
            
                63.21
             |                     
            
                42.20
             |                                 
            
                62,660
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/24/2019
             | 
            
                -0.10 / -0.16%
             |             
            
                62.80
             |           
            
                63.00
             |               
            
                62.50
             |                           
            
                62.80
             | 
            
                62.81
             |                     
            
                42.07
             |                                 
            
                61,220
             |            
            
                 
             |                                       
         
    
        
            | 
                1/23/2019
             | 
            
                +0.10 / +0.16%
             |             
            
                62.80
             |           
            
                63.20
             |               
            
                62.60
             |                           
            
                62.90
             | 
            
                62.81
             |                     
            
                42.13
             |                                 
            
                69,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/22/2019
             | 
            
                0.00 / 0.00%
             |             
            
                62.80
             |           
            
                63.10
             |               
            
                62.60
             |                           
            
                62.80
             | 
            
                62.77
             |                     
            
                42.07
             |                                 
            
                62,850
             |            
            
                 
             |                                       
         
    
        
            | 
                1/21/2019
             | 
            
                +0.20 / +0.32%
             |             
            
                62.60
             |           
            
                63.20
             |               
            
                62.60
             |                           
            
                62.80
             | 
            
                62.96
             |                     
            
                42.07
             |                                 
            
                71,890
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/18/2019
             | 
            
                +0.30 / +0.48%
             |             
            
                63.00
             |           
            
                64.00
             |               
            
                62.20
             |                           
            
                62.60
             | 
            
                62.94
             |                     
            
                41.93
             |                                 
            
                75,880
             |            
            
                 
             |                                       
         
    
        
            | 
                1/17/2019
             | 
            
                -3.20 / -4.89%
             |             
            
                65.60
             |           
            
                65.60
             |               
            
                62.20
             |                           
            
                62.30
             | 
            
                63.03
             |                     
            
                41.73
             |                                 
            
                105,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/16/2019
             | 
            
                -3.70 / -5.35%
             |             
            
                69.00
             |           
            
                69.10
             |               
            
                64.70
             |                           
            
                65.50
             | 
            
                66.86
             |                     
            
                43.87
             |                                 
            
                121,340
             |            
            
                 
             |                                       
         
    
        
            | 
                1/15/2019
             | 
            
                -1.30 / -1.84%
             |             
            
                70.50
             |           
            
                70.70
             |               
            
                69.00
             |                           
            
                69.20
             | 
            
                69.83
             |                     
            
                46.35
             |                                 
            
                69,580
             |  
            
                 
             |                                                              
             
    
         
    
    
 |