| 
                 
                    Closing price on 1/5/2021
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    61.80 | 
                 
                
                    | High | 
                    61.90 | 
                 
                
                    | Low | 
                    60.80 | 
                     
                
                    | Volume | 
                    156,100 | 
                                 
                
                    | Split-adjusted Price | 
                    36.49 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PTB Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                1/5/2021
             | 
            
                -0.80 / -1.29%
             |             
            
                61.80
             |           
            
                61.90
             |               
            
                60.80
             |                           
            
                61.00
             | 
            
                61.80
             |                     
            
                36.49
             |                                 
            
                156,100
             |            
            
                 
             |                                       
         
    
        
            | 
                1/4/2021
             | 
            
                +0.20 / +0.32%
             |             
            
                61.60
             |           
            
                62.50
             |               
            
                61.60
             |                           
            
                61.80
             | 
            
                61.91
             |                     
            
                36.97
             |                                 
            
                177,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/31/2020
             | 
            
                +0.80 / +1.32%
             |             
            
                60.80
             |           
            
                62.40
             |               
            
                60.10
             |                           
            
                61.60
             | 
            
                61.17
             |                     
            
                36.85
             |                                 
            
                313,390
             |            
            
                 
             |                                       
         
    
        
            | 
                12/30/2020
             | 
            
                +2.30 / +3.93%
             |             
            
                58.50
             |           
            
                60.90
             |               
            
                58.40
             |                           
            
                60.80
             | 
            
                60.07
             |                     
            
                36.38
             |                                 
            
                449,650
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/29/2020
             | 
            
                +0.40 / +0.69%
             |             
            
                58.00
             |           
            
                58.50
             |               
            
                57.90
             |                           
            
                58.50
             | 
            
                58.09
             |                     
            
                35.00
             |                                 
            
                126,560
             |            
            
                 
             |                                       
         
    
        
            | 
                12/28/2020
             | 
            
                -0.70 / -1.19%
             |             
            
                58.80
             |           
            
                58.90
             |               
            
                57.80
             |                           
            
                58.10
             | 
            
                58.23
             |                     
            
                34.76
             |                                 
            
                253,070
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/25/2020
             | 
            
                +0.30 / +0.51%
             |             
            
                58.10
             |           
            
                59.20
             |               
            
                57.60
             |                           
            
                58.80
             | 
            
                58.38
             |                     
            
                35.18
             |                                 
            
                125,340
             |            
            
                 
             |                                       
         
    
        
            | 
                12/24/2020
             | 
            
                -0.50 / -0.85%
             |             
            
                58.80
             |           
            
                58.80
             |               
            
                57.70
             |                           
            
                58.50
             | 
            
                58.01
             |                     
            
                35.00
             |                                 
            
                179,510
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/23/2020
             | 
            
                -0.90 / -1.50%
             |             
            
                59.90
             |           
            
                59.90
             |               
            
                58.00
             |                           
            
                59.00
             | 
            
                59.21
             |                     
            
                35.30
             |                                 
            
                135,440
             |            
            
                 
             |                                       
         
    
        
            | 
                12/22/2020
             | 
            
                +1.10 / +1.87%
             |             
            
                58.80
             |           
            
                59.90
             |               
            
                58.10
             |                           
            
                59.90
             | 
            
                58.93
             |                     
            
                35.84
             |                                 
            
                275,730
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/21/2020
             | 
            
                +0.60 / +1.03%
             |             
            
                58.10
             |           
            
                59.40
             |               
            
                57.40
             |                           
            
                58.80
             | 
            
                58.22
             |                     
            
                35.18
             |                                 
            
                699,170
             |            
            
                 
             |                                       
         
    
        
            | 
                12/18/2020
             | 
            
                -0.80 / -1.36%
             |             
            
                59.00
             |           
            
                59.00
             |               
            
                58.00
             |                           
            
                58.20
             | 
            
                58.39
             |                     
            
                34.82
             |                                 
            
                480,350
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/17/2020
             | 
            
                -1.20 / -1.99%
             |             
            
                59.50
             |           
            
                59.70
             |               
            
                57.90
             |                           
            
                59.00
             | 
            
                58.99
             |                     
            
                35.30
             |                                 
            
                365,240
             |            
            
                 
             |                                       
         
    
        
            | 
                12/16/2020
             | 
            
                +0.50 / +0.84%
             |             
            
                60.00
             |           
            
                60.20
             |               
            
                59.50
             |                           
            
                60.20
             | 
            
                59.79
             |                     
            
                36.02
             |                                 
            
                311,650
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/15/2020
             | 
            
                -0.30 / -0.50%
             |             
            
                60.00
             |           
            
                60.20
             |               
            
                59.60
             |                           
            
                59.70
             | 
            
                59.81
             |                     
            
                35.72
             |                                 
            
                163,620
             |            
            
                 
             |                                       
         
    
        
            | 
                12/14/2020
             | 
            
                +0.40 / +0.67%
             |             
            
                59.60
             |           
            
                61.00
             |               
            
                59.00
             |                           
            
                60.00
             | 
            
                60.13
             |                     
            
                35.90
             |                                 
            
                252,720
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/11/2020
             | 
            
                +0.50 / +0.85%
             |             
            
                59.20
             |           
            
                59.60
             |               
            
                58.60
             |                           
            
                59.60
             | 
            
                59.18
             |                     
            
                35.66
             |                                 
            
                120,860
             |            
            
                 
             |                                       
         
    
        
            | 
                12/10/2020
             | 
            
                -0.40 / -0.67%
             |             
            
                59.50
             |           
            
                60.00
             |               
            
                59.00
             |                           
            
                59.10
             | 
            
                59.45
             |                     
            
                35.36
             |                                 
            
                312,840
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/9/2020
             | 
            
                -0.10 / -0.17%
             |             
            
                59.60
             |           
            
                60.70
             |               
            
                59.20
             |                           
            
                59.50
             | 
            
                59.83
             |                     
            
                35.60
             |                                 
            
                242,290
             |            
            
                 
             |                                       
         
    
        
            | 
                12/8/2020
             | 
            
                -0.40 / -0.67%
             |             
            
                60.40
             |           
            
                60.40
             |               
            
                59.20
             |                           
            
                59.60
             | 
            
                59.62
             |                     
            
                35.66
             |                                 
            
                229,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/7/2020
             | 
            
                -0.20 / -0.33%
             |             
            
                59.90
             |           
            
                60.90
             |               
            
                59.80
             |                           
            
                60.00
             | 
            
                60.14
             |                     
            
                35.90
             |                                 
            
                209,010
             |            
            
                 
             |                                       
         
    
        
            | 
                12/4/2020
             | 
            
                -0.80 / -1.31%
             |             
            
                61.00
             |           
            
                61.30
             |               
            
                59.80
             |                           
            
                60.20
             | 
            
                60.43
             |                     
            
                36.02
             |                                 
            
                195,640
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/3/2020
             | 
            
                +1.90 / +3.21%
             |             
            
                59.10
             |           
            
                61.00
             |               
            
                58.50
             |                           
            
                61.00
             | 
            
                59.37
             |                     
            
                36.49
             |                                 
            
                308,900
             |            
            
                 
             |                                       
         
    
        
            | 
                12/2/2020
             | 
            
                -0.10 / -0.17%
             |             
            
                59.20
             |           
            
                59.60
             |               
            
                58.70
             |                           
            
                59.10
             | 
            
                59.11
             |                     
            
                35.36
             |                                 
            
                161,140
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/1/2020
             | 
            
                +1.10 / +1.89%
             |             
            
                57.80
             |           
            
                59.20
             |               
            
                56.50
             |                           
            
                59.20
             | 
            
                58.21
             |                     
            
                35.42
             |                                 
            
                351,950
             |            
            
                 
             |                                       
         
    
        
            | 
                11/30/2020
             | 
            
                +0.80 / +1.40%
             |             
            
                57.50
             |           
            
                58.90
             |               
            
                57.00
             |                           
            
                58.10
             | 
            
                58.26
             |                     
            
                34.76
             |                                 
            
                311,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/27/2020
             | 
            
                +0.90 / +1.60%
             |             
            
                56.40
             |           
            
                57.50
             |               
            
                56.40
             |                           
            
                57.30
             | 
            
                57.03
             |                     
            
                34.28
             |                                 
            
                235,650
             |            
            
                 
             |                                       
         
    
        
            | 
                11/26/2020
             | 
            
                -0.10 / -0.18%
             |             
            
                56.20
             |           
            
                56.40
             |               
            
                55.80
             |                           
            
                56.40
             | 
            
                56.11
             |                     
            
                33.74
             |                                 
            
                190,960
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/25/2020
             | 
            
                -0.50 / -0.88%
             |             
            
                57.00
             |           
            
                57.40
             |               
            
                56.30
             |                           
            
                56.50
             | 
            
                56.75
             |                     
            
                33.80
             |                                 
            
                183,110
             |            
            
                 
             |                                       
         
    
        
            | 
                11/24/2020
             | 
            
                -0.50 / -0.87%
             |             
            
                57.50
             |           
            
                57.80
             |               
            
                56.60
             |                           
            
                57.00
             | 
            
                57.04
             |                     
            
                34.10
             |                                 
            
                331,820
             |  
            
                 
             |                                                              
             
    
         
    
    
 |