| 
                 
                    Closing price on 12/20/2019
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    80.00 | 
                 
                
                    | High | 
                    81.00 | 
                 
                
                    | Low | 
                    80.00 | 
                     
                
                    | Volume | 
                    31,590 | 
                                 
                
                    | Split-adjusted Price | 
                    70.79 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
AST Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                12/20/2019
             | 
            
                +0.50 / +0.63%
             |             
            
                80.00
             |           
            
                81.00
             |               
            
                80.00
             |                           
            
                80.50
             | 
            
                80.22
             |                     
            
                70.79
             |                                 
            
                31,590
             |            
            
                 
             |                                       
         
    
        
            | 
                12/19/2019
             | 
            
                0.00 / 0.00%
             |             
            
                81.00
             |           
            
                81.90
             |               
            
                79.20
             |                           
            
                80.00
             | 
            
                80.43
             |                     
            
                70.35
             |                                 
            
                37,090
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/18/2019
             | 
            
                +0.40 / +0.50%
             |             
            
                79.60
             |           
            
                81.80
             |               
            
                79.00
             |                           
            
                80.00
             | 
            
                79.98
             |                     
            
                70.35
             |                                 
            
                41,710
             |            
            
                 
             |                                       
         
    
        
            | 
                12/17/2019
             | 
            
                -2.90 / -3.52%
             |             
            
                83.20
             |           
            
                83.20
             |               
            
                79.20
             |                           
            
                79.60
             | 
            
                80.53
             |                     
            
                70.00
             |                                 
            
                40,430
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/16/2019
             | 
            
                0.00 / 0.00%
             |             
            
                84.00
             |           
            
                85.00
             |               
            
                79.90
             |                           
            
                82.50
             | 
            
                80.71
             |                     
            
                72.55
             |                                 
            
                69,140
             |            
            
                 
             |                                       
         
    
        
            | 
                12/13/2019
             | 
            
                0.00 / 0.00%
             |             
            
                81.00
             |           
            
                83.50
             |               
            
                80.00
             |                           
            
                82.50
             | 
            
                82.63
             |                     
            
                72.55
             |                                 
            
                39,720
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/12/2019
             | 
            
                -1.50 / -1.79%
             |             
            
                86.90
             |           
            
                86.90
             |               
            
                80.10
             |                           
            
                82.50
             | 
            
                82.21
             |                     
            
                72.55
             |                                 
            
                40,860
             |            
            
                 
             |                                       
         
    
        
            | 
                12/11/2019
             | 
            
                -2.30 / -2.67%
             |             
            
                86.00
             |           
            
                88.00
             |               
            
                83.90
             |                           
            
                84.00
             | 
            
                85.30
             |                     
            
                73.86
             |                                 
            
                34,480
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/10/2019
             | 
            
                -3.60 / -4.00%
             |             
            
                89.10
             |           
            
                89.90
             |               
            
                86.00
             |                           
            
                86.30
             | 
            
                87.39
             |                     
            
                75.89
             |                                 
            
                62,100
             |            
            
                 
             |                                       
         
    
        
            | 
                12/9/2019
             | 
            
                +5.40 / +6.39%
             |             
            
                85.00
             |           
            
                89.90
             |               
            
                85.00
             |                           
            
                89.90
             | 
            
                88.00
             |                     
            
                79.05
             |                                 
            
                40,920
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/6/2019
             | 
            
                -0.80 / -0.94%
             |             
            
                85.60
             |           
            
                85.60
             |               
            
                82.00
             |                           
            
                84.50
             | 
            
                84.12
             |                     
            
                74.30
             |                                 
            
                40,610
             |            
            
                 
             |                                       
         
    
        
            | 
                12/5/2019
             | 
            
                +3.30 / +4.02%
             |             
            
                84.00
             |           
            
                86.00
             |               
            
                84.00
             |                           
            
                85.30
             | 
            
                85.03
             |                     
            
                75.01
             |                                 
            
                41,750
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/4/2019
             | 
            
                +3.00 / +3.80%
             |             
            
                79.80
             |           
            
                82.50
             |               
            
                77.50
             |                           
            
                82.00
             | 
            
                79.45
             |                     
            
                72.11
             |                                 
            
                42,190
             |            
            
                 
             |                                       
         
    
        
            | 
                12/3/2019
             | 
            
                -0.80 / -1.00%
             |             
            
                79.80
             |           
            
                82.20
             |               
            
                77.00
             |                           
            
                79.00
             | 
            
                79.30
             |                     
            
                69.47
             |                                 
            
                65,690
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/2/2019
             | 
            
                +1.60 / +2.05%
             |             
            
                78.80
             |           
            
                79.80
             |               
            
                78.20
             |                           
            
                79.80
             | 
            
                78.98
             |                     
            
                70.17
             |                                 
            
                41,150
             |            
            
                 
             |                                       
         
    
        
            | 
                11/29/2019
             | 
            
                0.00 / 0.00%
             |             
            
                78.50
             |           
            
                79.00
             |               
            
                77.80
             |                           
            
                78.20
             | 
            
                78.12
             |                     
            
                68.76
             |                                 
            
                40,720
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/28/2019
             | 
            
                +0.70 / +0.90%
             |             
            
                77.80
             |           
            
                78.20
             |               
            
                77.20
             |                           
            
                78.20
             | 
            
                77.54
             |                     
            
                68.76
             |                                 
            
                44,220
             |            
            
                 
             |                                       
         
    
        
            | 
                11/27/2019
             | 
            
                +2.30 / +3.06%
             |             
            
                75.20
             |           
            
                77.50
             |               
            
                75.20
             |                           
            
                77.50
             | 
            
                76.69
             |                     
            
                68.15
             |                                 
            
                46,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/26/2019
             | 
            
                -0.30 / -0.40%
             |             
            
                75.20
             |           
            
                75.50
             |               
            
                74.60
             |                           
            
                75.20
             | 
            
                75.08
             |                     
            
                66.13
             |                                 
            
                42,210
             |            
            
                 
             |                                       
         
    
        
            | 
                11/25/2019
             | 
            
                -1.40 / -1.82%
             |             
            
                76.50
             |           
            
                76.50
             |               
            
                75.00
             |                           
            
                75.50
             | 
            
                75.79
             |                     
            
                66.39
             |                                 
            
                40,730
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/22/2019
             | 
            
                -1.10 / -1.41%
             |             
            
                78.00
             |           
            
                78.00
             |               
            
                75.70
             |                           
            
                76.90
             | 
            
                77.02
             |                     
            
                67.62
             |                                 
            
                53,530
             |            
            
                 
             |                                       
         
    
        
            | 
                11/21/2019
             | 
            
                +2.10 / +2.77%
             |             
            
                76.00
             |           
            
                78.00
             |               
            
                76.00
             |                           
            
                78.00
             | 
            
                76.75
             |                     
            
                68.59
             |                                 
            
                48,170
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/20/2019
             | 
            
                +0.70 / +0.93%
             |             
            
                75.50
             |           
            
                75.90
             |               
            
                75.00
             |                           
            
                75.90
             | 
            
                75.55
             |                     
            
                66.74
             |                                 
            
                42,580
             |            
            
                 
             |                                       
         
    
        
            | 
                11/19/2019
             | 
            
                +1.40 / +1.90%
             |             
            
                73.80
             |           
            
                75.20
             |               
            
                73.80
             |                           
            
                75.20
             | 
            
                74.88
             |                     
            
                66.13
             |                                 
            
                43,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/18/2019
             | 
            
                +1.00 / +1.37%
             |             
            
                73.00
             |           
            
                73.80
             |               
            
                73.00
             |                           
            
                73.80
             | 
            
                73.54
             |                     
            
                64.90
             |                                 
            
                41,040
             |            
            
                 
             |                                       
         
    
        
            | 
                11/15/2019
             | 
            
                +1.30 / +1.82%
             |             
            
                71.50
             |           
            
                73.40
             |               
            
                71.50
             |                           
            
                72.80
             | 
            
                72.72
             |                     
            
                64.02
             |                                 
            
                43,730
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/14/2019
             | 
            
                -1.90 / -2.59%
             |             
            
                73.40
             |           
            
                73.40
             |               
            
                71.30
             |                           
            
                71.50
             | 
            
                71.80
             |                     
            
                62.87
             |                                 
            
                41,240
             |            
            
                 
             |                                       
         
    
        
            | 
                11/13/2019
             | 
            
                0.00 / 0.00%
             |             
            
                73.50
             |           
            
                73.60
             |               
            
                72.50
             |                           
            
                73.40
             | 
            
                73.04
             |                     
            
                62.79
             |                                 
            
                40,690
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/12/2019
             | 
            
                +1.20 / +1.66%
             |             
            
                72.40
             |           
            
                73.40
             |               
            
                71.80
             |                           
            
                73.40
             | 
            
                72.88
             |                     
            
                62.79
             |                                 
            
                44,130
             |            
            
                 
             |                                       
         
    
        
            | 
                11/11/2019
             | 
            
                -0.20 / -0.28%
             |             
            
                72.00
             |           
            
                73.00
             |               
            
                71.50
             |                           
            
                72.20
             | 
            
                72.09
             |                     
            
                61.76
             |                                 
            
                46,400
             |  
            
                 
             |                                                              
             
    
         
    
    
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