| 
                 
                    Closing price on 4/24/2018
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    82.00 | 
                 
                
                    | High | 
                    82.50 | 
                 
                
                    | Low | 
                    81.00 | 
                     
                
                    | Volume | 
                    149,860 | 
                                 
                
                    | Split-adjusted Price | 
                    53.61 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
AST Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                4/24/2018
             | 
            
                +0.50 / +0.61%
             |             
            
                82.00
             |           
            
                82.50
             |               
            
                81.00
             |                           
            
                82.50
             | 
            
                81.86
             |                     
            
                53.61
             |                                 
            
                149,860
             |            
            
                 
             |                                       
         
    
        
            | 
                4/23/2018
             | 
            
                -0.50 / -0.61%
             |             
            
                83.00
             |           
            
                83.50
             |               
            
                80.00
             |                           
            
                82.00
             | 
            
                81.90
             |                     
            
                53.29
             |                                 
            
                164,650
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/20/2018
             | 
            
                +0.50 / +0.61%
             |             
            
                83.50
             |           
            
                83.50
             |               
            
                82.30
             |                           
            
                82.50
             | 
            
                82.56
             |                     
            
                53.61
             |                                 
            
                106,250
             |            
            
                 
             |                                       
         
    
        
            | 
                4/19/2018
             | 
            
                +0.80 / +0.99%
             |             
            
                81.50
             |           
            
                84.40
             |               
            
                81.20
             |                           
            
                82.00
             | 
            
                82.38
             |                     
            
                53.29
             |                                 
            
                238,130
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/18/2018
             | 
            
                +1.20 / +1.50%
             |             
            
                80.50
             |           
            
                81.40
             |               
            
                80.10
             |                           
            
                81.20
             | 
            
                81.08
             |                     
            
                52.77
             |                                 
            
                246,030
             |            
            
                 
             |                                       
         
    
        
            | 
                4/17/2018
             | 
            
                +1.00 / +1.27%
             |             
            
                79.90
             |           
            
                80.50
             |               
            
                79.80
             |                           
            
                80.00
             | 
            
                79.99
             |                     
            
                51.99
             |                                 
            
                257,250
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/16/2018
             | 
            
                +0.70 / +0.89%
             |             
            
                79.20
             |           
            
                79.50
             |               
            
                78.50
             |                           
            
                79.00
             | 
            
                78.93
             |                     
            
                51.34
             |                                 
            
                104,460
             |            
            
                 
             |                                       
         
    
        
            | 
                4/13/2018
             | 
            
                +0.90 / +1.16%
             |             
            
                76.30
             |           
            
                79.00
             |               
            
                76.30
             |                           
            
                78.30
             | 
            
                76.84
             |                     
            
                50.88
             |                                 
            
                353,340
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/12/2018
             | 
            
                -0.50 / -0.64%
             |             
            
                77.90
             |           
            
                77.90
             |               
            
                77.00
             |                           
            
                77.40
             | 
            
                77.33
             |                     
            
                50.30
             |                                 
            
                138,310
             |            
            
                 
             |                                       
         
    
        
            | 
                4/11/2018
             | 
            
                -2.20 / -2.75%
             |             
            
                80.70
             |           
            
                80.70
             |               
            
                77.50
             |                           
            
                77.90
             | 
            
                78.80
             |                     
            
                50.62
             |                                 
            
                228,580
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/10/2018
             | 
            
                -0.70 / -0.87%
             |             
            
                81.00
             |           
            
                81.00
             |               
            
                80.00
             |                           
            
                80.10
             | 
            
                80.30
             |                     
            
                52.05
             |                                 
            
                115,720
             |            
            
                 
             |                                       
         
    
        
            | 
                4/9/2018
             | 
            
                -0.60 / -0.74%
             |             
            
                81.90
             |           
            
                82.00
             |               
            
                80.00
             |                           
            
                80.80
             | 
            
                80.88
             |                     
            
                52.51
             |                                 
            
                135,170
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/6/2018
             | 
            
                +0.50 / +0.62%
             |             
            
                81.40
             |           
            
                81.50
             |               
            
                80.90
             |                           
            
                81.40
             | 
            
                81.04
             |                     
            
                52.90
             |                                 
            
                180,160
             |            
            
                 
             |                                       
         
    
        
            | 
                4/5/2018
             | 
            
                0.00 / 0.00%
             |             
            
                81.90
             |           
            
                81.90
             |               
            
                80.00
             |                           
            
                80.90
             | 
            
                80.50
             |                     
            
                52.57
             |                                 
            
                146,820
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/4/2018
             | 
            
                +0.40 / +0.50%
             |             
            
                81.70
             |           
            
                81.70
             |               
            
                80.00
             |                           
            
                80.90
             | 
            
                80.47
             |                     
            
                52.57
             |                                 
            
                175,870
             |            
            
                 
             |                                       
         
    
        
            | 
                4/3/2018
             | 
            
                +0.70 / +0.88%
             |             
            
                80.00
             |           
            
                81.90
             |               
            
                80.00
             |                           
            
                80.50
             | 
            
                80.45
             |                     
            
                52.31
             |                                 
            
                185,980
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/2/2018
             | 
            
                -0.20 / -0.25%
             |             
            
                80.00
             |           
            
                80.00
             |               
            
                79.10
             |                           
            
                79.80
             | 
            
                79.64
             |                     
            
                51.86
             |                                 
            
                139,790
             |            
            
                 
             |                                       
         
    
        
            | 
                3/30/2018
             | 
            
                0.00 / 0.00%
             |             
            
                80.30
             |           
            
                80.40
             |               
            
                78.00
             |                           
            
                80.00
             | 
            
                79.64
             |                     
            
                51.99
             |                                 
            
                112,340
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/29/2018
             | 
            
                -0.70 / -0.87%
             |             
            
                81.00
             |           
            
                81.30
             |               
            
                79.00
             |                           
            
                80.00
             | 
            
                79.98
             |                     
            
                51.99
             |                                 
            
                118,090
             |            
            
                 
             |                                       
         
    
        
            | 
                3/28/2018
             | 
            
                -1.30 / -1.59%
             |             
            
                82.50
             |           
            
                82.50
             |               
            
                79.00
             |                           
            
                80.70
             | 
            
                81.44
             |                     
            
                52.44
             |                                 
            
                143,580
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/27/2018
             | 
            
                +4.40 / +5.67%
             |             
            
                79.50
             |           
            
                82.00
             |               
            
                79.00
             |                           
            
                82.00
             | 
            
                79.63
             |                     
            
                53.29
             |                                 
            
                154,960
             |            
            
                 
             |                                       
         
    
        
            | 
                3/26/2018
             | 
            
                +0.80 / +1.04%
             |             
            
                76.80
             |           
            
                77.70
             |               
            
                76.70
             |                           
            
                77.60
             | 
            
                77.30
             |                     
            
                50.43
             |                                 
            
                128,920
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/23/2018
             | 
            
                -0.20 / -0.26%
             |             
            
                73.00
             |           
            
                77.00
             |               
            
                73.00
             |                           
            
                76.80
             | 
            
                75.71
             |                     
            
                49.91
             |                                 
            
                116,420
             |            
            
                 
             |                                       
         
    
        
            | 
                3/22/2018
             | 
            
                +0.50 / +0.65%
             |             
            
                76.60
             |           
            
                79.00
             |               
            
                74.60
             |                           
            
                77.00
             | 
            
                76.57
             |                     
            
                50.04
             |                                 
            
                173,020
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/21/2018
             | 
            
                -5.50 / -6.71%
             |             
            
                80.30
             |           
            
                82.50
             |               
            
                76.50
             |                           
            
                76.50
             | 
            
                78.97
             |                     
            
                49.71
             |                                 
            
                245,380
             |            
            
                 
             |                                       
         
    
        
            | 
                3/20/2018
             | 
            
                +0.60 / +0.74%
             |             
            
                81.90
             |           
            
                82.40
             |               
            
                80.10
             |                           
            
                82.00
             | 
            
                81.73
             |                     
            
                53.29
             |                                 
            
                552,330
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/19/2018
             | 
            
                -0.60 / -0.73%
             |             
            
                82.90
             |           
            
                82.90
             |               
            
                80.30
             |                           
            
                81.40
             | 
            
                81.65
             |                     
            
                52.90
             |                                 
            
                124,120
             |            
            
                 
             |                                       
         
    
        
            | 
                3/16/2018
             | 
            
                +4.30 / +5.53%
             |             
            
                77.70
             |           
            
                82.00
             |               
            
                77.50
             |                           
            
                82.00
             | 
            
                79.47
             |                     
            
                53.29
             |                                 
            
                228,160
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/15/2018
             | 
            
                -5.80 / -6.95%
             |             
            
                84.00
             |           
            
                84.00
             |               
            
                77.70
             |                           
            
                77.70
             | 
            
                80.27
             |                     
            
                50.49
             |                                 
            
                321,820
             |            
            
                 
             |                                       
         
    
        
            | 
                3/14/2018
             | 
            
                +0.60 / +0.72%
             |             
            
                83.70
             |           
            
                84.20
             |               
            
                82.90
             |                           
            
                83.50
             | 
            
                83.59
             |                     
            
                54.26
             |                                 
            
                138,290
             |  
            
                 
             |                                                              
             
    
         
    
    
 |