| 
                 
                    Closing price on 10/28/2019
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    75.30 | 
                 
                
                    | High | 
                    76.00 | 
                 
                
                    | Low | 
                    74.90 | 
                     
                
                    | Volume | 
                    344,210 | 
                                 
                
                    | Split-adjusted Price | 
                    42.12 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PTB Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                10/28/2019
             | 
            
                -0.40 / -0.53%
             |             
            
                75.30
             |           
            
                76.00
             |               
            
                74.90
             |                           
            
                74.90
             | 
            
                75.40
             |                     
            
                42.12
             |                                 
            
                344,210
             |            
            
                 
             |                                       
         
    
        
            | 
                10/25/2019
             | 
            
                -1.00 / -1.31%
             |             
            
                76.30
             |           
            
                76.30
             |               
            
                75.30
             |                           
            
                75.30
             | 
            
                75.84
             |                     
            
                42.34
             |                                 
            
                68,130
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/24/2019
             | 
            
                +1.50 / +2.01%
             |             
            
                75.00
             |           
            
                76.50
             |               
            
                74.30
             |                           
            
                76.30
             | 
            
                75.66
             |                     
            
                42.90
             |                                 
            
                486,340
             |            
            
                 
             |                                       
         
    
        
            | 
                10/23/2019
             | 
            
                +0.80 / +1.08%
             |             
            
                74.30
             |           
            
                74.90
             |               
            
                72.60
             |                           
            
                74.80
             | 
            
                74.38
             |                     
            
                42.06
             |                                 
            
                264,080
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/22/2019
             | 
            
                -1.00 / -1.33%
             |             
            
                75.10
             |           
            
                75.20
             |               
            
                74.00
             |                           
            
                74.00
             | 
            
                74.55
             |                     
            
                41.61
             |                                 
            
                121,300
             |            
            
                 
             |                                       
         
    
        
            | 
                10/21/2019
             | 
            
                +0.50 / +0.67%
             |             
            
                74.60
             |           
            
                75.20
             |               
            
                74.00
             |                           
            
                75.00
             | 
            
                74.38
             |                     
            
                42.17
             |                                 
            
                333,320
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/18/2019
             | 
            
                -0.40 / -0.53%
             |             
            
                74.30
             |           
            
                74.80
             |               
            
                74.00
             |                           
            
                74.50
             | 
            
                74.23
             |                     
            
                41.89
             |                                 
            
                108,120
             |            
            
                 
             |                                       
         
    
        
            | 
                10/17/2019
             | 
            
                +1.20 / +1.63%
             |             
            
                73.50
             |           
            
                74.90
             |               
            
                72.50
             |                           
            
                74.90
             | 
            
                73.55
             |                     
            
                42.12
             |                                 
            
                165,230
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/16/2019
             | 
            
                -0.20 / -0.27%
             |             
            
                74.00
             |           
            
                75.50
             |               
            
                73.50
             |                           
            
                73.70
             | 
            
                74.50
             |                     
            
                41.44
             |                                 
            
                222,370
             |            
            
                 
             |                                       
         
    
        
            | 
                10/15/2019
             | 
            
                +1.50 / +2.07%
             |             
            
                72.60
             |           
            
                74.00
             |               
            
                72.30
             |                           
            
                73.90
             | 
            
                73.48
             |                     
            
                41.55
             |                                 
            
                417,770
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/14/2019
             | 
            
                +0.50 / +0.70%
             |             
            
                72.40
             |           
            
                72.50
             |               
            
                71.90
             |                           
            
                72.40
             | 
            
                72.36
             |                     
            
                40.71
             |                                 
            
                115,810
             |            
            
                 
             |                                       
         
    
        
            | 
                10/11/2019
             | 
            
                -0.80 / -1.10%
             |             
            
                72.70
             |           
            
                72.70
             |               
            
                71.80
             |                           
            
                71.90
             | 
            
                72.21
             |                     
            
                40.43
             |                                 
            
                139,770
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/10/2019
             | 
            
                +2.60 / +3.71%
             |             
            
                70.10
             |           
            
                72.90
             |               
            
                70.10
             |                           
            
                72.70
             | 
            
                72.00
             |                     
            
                40.88
             |                                 
            
                353,050
             |            
            
                 
             |                                       
         
    
        
            | 
                10/9/2019
             | 
            
                +0.30 / +0.43%
             |             
            
                69.30
             |           
            
                70.70
             |               
            
                69.00
             |                           
            
                70.10
             | 
            
                69.90
             |                     
            
                39.42
             |                                 
            
                105,750
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/8/2019
             | 
            
                +0.40 / +0.58%
             |             
            
                69.40
             |           
            
                70.00
             |               
            
                69.00
             |                           
            
                69.80
             | 
            
                69.50
             |                     
            
                39.25
             |                                 
            
                62,600
             |            
            
                 
             |                                       
         
    
        
            | 
                10/7/2019
             | 
            
                -1.00 / -1.42%
             |             
            
                70.00
             |           
            
                70.90
             |               
            
                69.00
             |                           
            
                69.40
             | 
            
                69.75
             |                     
            
                39.02
             |                                 
            
                63,730
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/4/2019
             | 
            
                -0.50 / -0.71%
             |             
            
                70.70
             |           
            
                71.00
             |               
            
                70.40
             |                           
            
                70.40
             | 
            
                70.68
             |                     
            
                39.59
             |                                 
            
                157,800
             |            
            
                 
             |                                       
         
    
        
            | 
                10/3/2019
             | 
            
                +0.10 / +0.14%
             |             
            
                70.50
             |           
            
                71.10
             |               
            
                70.00
             |                           
            
                70.90
             | 
            
                70.63
             |                     
            
                39.87
             |                                 
            
                143,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/2/2019
             | 
            
                -0.40 / -0.56%
             |             
            
                71.00
             |           
            
                71.50
             |               
            
                70.70
             |                           
            
                70.80
             | 
            
                71.06
             |                     
            
                39.81
             |                                 
            
                144,420
             |            
            
                 
             |                                       
         
    
        
            | 
                10/1/2019
             | 
            
                +1.50 / +2.15%
             |             
            
                69.70
             |           
            
                71.20
             |               
            
                69.20
             |                           
            
                71.20
             | 
            
                70.60
             |                     
            
                40.04
             |                                 
            
                369,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/30/2019
             | 
            
                +1.70 / +2.50%
             |             
            
                68.00
             |           
            
                70.00
             |               
            
                67.00
             |                           
            
                69.70
             | 
            
                69.16
             |                     
            
                39.19
             |                                 
            
                190,210
             |            
            
                 
             |                                       
         
    
        
            | 
                9/27/2019
             | 
            
                -0.50 / -0.73%
             |             
            
                68.50
             |           
            
                68.90
             |               
            
                67.50
             |                           
            
                68.00
             | 
            
                68.06
             |                     
            
                38.24
             |                                 
            
                55,550
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/26/2019
             | 
            
                +1.00 / +1.48%
             |             
            
                67.90
             |           
            
                68.70
             |               
            
                67.10
             |                           
            
                68.50
             | 
            
                67.80
             |                     
            
                38.52
             |                                 
            
                51,360
             |            
            
                 
             |                                       
         
    
        
            | 
                9/25/2019
             | 
            
                0.00 / 0.00%
             |             
            
                68.00
             |           
            
                68.00
             |               
            
                66.80
             |                           
            
                67.50
             | 
            
                67.08
             |                     
            
                37.96
             |                                 
            
                17,890
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/24/2019
             | 
            
                +1.50 / +2.27%
             |             
            
                65.80
             |           
            
                67.50
             |               
            
                65.80
             |                           
            
                67.50
             | 
            
                66.88
             |                     
            
                37.96
             |                                 
            
                41,510
             |            
            
                 
             |                                       
         
    
        
            | 
                9/23/2019
             | 
            
                -2.20 / -3.23%
             |             
            
                68.20
             |           
            
                68.20
             |               
            
                66.00
             |                           
            
                66.00
             | 
            
                67.08
             |                     
            
                37.11
             |                                 
            
                229,140
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/20/2019
             | 
            
                -0.30 / -0.44%
             |             
            
                68.50
             |           
            
                69.00
             |               
            
                68.20
             |                           
            
                68.20
             | 
            
                68.44
             |                     
            
                38.35
             |                                 
            
                72,190
             |            
            
                 
             |                                       
         
    
        
            | 
                9/19/2019
             | 
            
                0.00 / 0.00%
             |             
            
                68.50
             |           
            
                68.70
             |               
            
                68.20
             |                           
            
                68.50
             | 
            
                68.48
             |                     
            
                38.52
             |                                 
            
                49,370
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/18/2019
             | 
            
                +0.30 / +0.44%
             |             
            
                68.50
             |           
            
                70.00
             |               
            
                68.50
             |                           
            
                68.50
             | 
            
                68.68
             |                     
            
                38.52
             |                                 
            
                104,210
             |            
            
                 
             |                                       
         
    
        
            | 
                9/17/2019
             | 
            
                -1.60 / -2.29%
             |             
            
                69.90
             |           
            
                69.90
             |               
            
                68.20
             |                           
            
                68.20
             | 
            
                69.14
             |                     
            
                38.35
             |                                 
            
                61,020
             |  
            
                 
             |                                                              
             
    
         
    
    
 |