| 
                 
                    Closing price on 3/18/2020
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    45.50 | 
                 
                
                    | High | 
                    45.50 | 
                 
                
                    | Low | 
                    42.80 | 
                     
                
                    | Volume | 
                    243,370 | 
                                 
                
                    | Split-adjusted Price | 
                    24.29 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PTB Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                3/18/2020
             | 
            
                -0.80 / -1.82%
             |             
            
                45.50
             |           
            
                45.50
             |               
            
                42.80
             |                           
            
                43.20
             | 
            
                43.46
             |                     
            
                24.29
             |                                 
            
                243,370
             |            
            
                 
             |                                       
         
    
        
            | 
                3/17/2020
             | 
            
                -0.85 / -1.90%
             |             
            
                41.80
             |           
            
                44.00
             |               
            
                41.80
             |                           
            
                44.00
             | 
            
                43.20
             |                     
            
                24.74
             |                                 
            
                155,940
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/16/2020
             | 
            
                -3.35 / -6.95%
             |             
            
                48.20
             |           
            
                48.20
             |               
            
                44.85
             |                           
            
                44.85
             | 
            
                45.31
             |                     
            
                25.22
             |                                 
            
                243,650
             |            
            
                 
             |                                       
         
    
        
            | 
                3/13/2020
             | 
            
                -2.10 / -4.17%
             |             
            
                46.80
             |           
            
                49.00
             |               
            
                46.80
             |                           
            
                48.20
             | 
            
                46.86
             |                     
            
                27.10
             |                                 
            
                237,450
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/12/2020
             | 
            
                -3.70 / -6.85%
             |             
            
                53.00
             |           
            
                53.00
             |               
            
                50.30
             |                           
            
                50.30
             | 
            
                50.42
             |                     
            
                28.28
             |                                 
            
                143,310
             |            
            
                 
             |                                       
         
    
        
            | 
                3/11/2020
             | 
            
                -4.00 / -6.90%
             |             
            
                58.00
             |           
            
                58.80
             |               
            
                54.00
             |                           
            
                54.00
             | 
            
                54.67
             |                     
            
                30.36
             |                                 
            
                181,730
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/10/2020
             | 
            
                +0.60 / +1.05%
             |             
            
                53.50
             |           
            
                58.00
             |               
            
                53.50
             |                           
            
                58.00
             | 
            
                55.88
             |                     
            
                32.61
             |                                 
            
                61,610
             |            
            
                 
             |                                       
         
    
        
            | 
                3/9/2020
             | 
            
                -4.30 / -6.97%
             |             
            
                58.80
             |           
            
                58.80
             |               
            
                57.40
             |                           
            
                57.40
             | 
            
                57.75
             |                     
            
                32.28
             |                                 
            
                83,930
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/6/2020
             | 
            
                -1.30 / -2.06%
             |             
            
                63.00
             |           
            
                63.00
             |               
            
                61.60
             |                           
            
                61.70
             | 
            
                62.15
             |                     
            
                34.69
             |                                 
            
                66,570
             |            
            
                 
             |                                       
         
    
        
            | 
                3/5/2020
             | 
            
                -0.20 / -0.32%
             |             
            
                63.20
             |           
            
                63.30
             |               
            
                62.60
             |                           
            
                63.00
             | 
            
                62.88
             |                     
            
                35.43
             |                                 
            
                23,440
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/4/2020
             | 
            
                -0.30 / -0.47%
             |             
            
                64.00
             |           
            
                64.00
             |               
            
                63.20
             |                           
            
                63.20
             | 
            
                63.41
             |                     
            
                35.54
             |                                 
            
                13,310
             |            
            
                 
             |                                       
         
    
        
            | 
                3/3/2020
             | 
            
                -0.40 / -0.63%
             |             
            
                64.20
             |           
            
                64.20
             |               
            
                63.00
             |                           
            
                63.50
             | 
            
                63.57
             |                     
            
                35.71
             |                                 
            
                9,360
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/2/2020
             | 
            
                +0.90 / +1.43%
             |             
            
                63.00
             |           
            
                63.90
             |               
            
                62.50
             |                           
            
                63.90
             | 
            
                62.85
             |                     
            
                35.93
             |                                 
            
                9,610
             |            
            
                 
             |                                       
         
    
        
            | 
                2/28/2020
             | 
            
                -1.00 / -1.56%
             |             
            
                63.00
             |           
            
                64.40
             |               
            
                63.00
             |                           
            
                63.00
             | 
            
                63.65
             |                     
            
                35.43
             |                                 
            
                29,630
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/27/2020
             | 
            
                0.00 / 0.00%
             |             
            
                65.00
             |           
            
                65.00
             |               
            
                63.50
             |                           
            
                64.00
             | 
            
                64.01
             |                     
            
                35.99
             |                                 
            
                11,420
             |            
            
                 
             |                                       
         
    
        
            | 
                2/26/2020
             | 
            
                -2.00 / -3.03%
             |             
            
                62.00
             |           
            
                65.80
             |               
            
                62.00
             |                           
            
                64.00
             | 
            
                62.91
             |                     
            
                35.99
             |                                 
            
                11,540
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/25/2020
             | 
            
                +2.00 / +3.13%
             |             
            
                63.50
             |           
            
                66.00
             |               
            
                62.80
             |                           
            
                66.00
             | 
            
                64.17
             |                     
            
                37.11
             |                                 
            
                30,530
             |            
            
                 
             |                                       
         
    
        
            | 
                2/24/2020
             | 
            
                -1.90 / -2.88%
             |             
            
                65.80
             |           
            
                65.90
             |               
            
                64.00
             |                           
            
                64.00
             | 
            
                64.56
             |                     
            
                35.99
             |                                 
            
                38,850
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/21/2020
             | 
            
                -0.30 / -0.45%
             |             
            
                66.20
             |           
            
                66.20
             |               
            
                65.70
             |                           
            
                65.90
             | 
            
                65.97
             |                     
            
                37.06
             |                                 
            
                82,380
             |            
            
                 
             |                                       
         
    
        
            | 
                2/20/2020
             | 
            
                -0.20 / -0.30%
             |             
            
                67.20
             |           
            
                67.20
             |               
            
                66.10
             |                           
            
                66.20
             | 
            
                66.27
             |                     
            
                37.22
             |                                 
            
                87,890
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/19/2020
             | 
            
                -0.90 / -1.34%
             |             
            
                67.30
             |           
            
                67.30
             |               
            
                66.40
             |                           
            
                66.40
             | 
            
                66.66
             |                     
            
                37.34
             |                                 
            
                64,790
             |            
            
                 
             |                                       
         
    
        
            | 
                2/18/2020
             | 
            
                0.00 / 0.00%
             |             
            
                66.80
             |           
            
                67.40
             |               
            
                66.80
             |                           
            
                67.30
             | 
            
                67.01
             |                     
            
                37.84
             |                                 
            
                23,220
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/17/2020
             | 
            
                -0.80 / -1.17%
             |             
            
                68.00
             |           
            
                68.20
             |               
            
                67.10
             |                           
            
                67.30
             | 
            
                67.66
             |                     
            
                37.84
             |                                 
            
                3,340
             |            
            
                 
             |                                       
         
    
        
            | 
                2/14/2020
             | 
            
                -0.30 / -0.44%
             |             
            
                68.30
             |           
            
                68.40
             |               
            
                68.00
             |                           
            
                68.10
             | 
            
                68.17
             |                     
            
                38.29
             |                                 
            
                474,850
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/13/2020
             | 
            
                -0.20 / -0.29%
             |             
            
                68.00
             |           
            
                68.60
             |               
            
                68.00
             |                           
            
                68.40
             | 
            
                68.28
             |                     
            
                38.46
             |                                 
            
                39,690
             |            
            
                 
             |                                       
         
    
        
            | 
                2/12/2020
             | 
            
                +0.60 / +0.88%
             |             
            
                67.90
             |           
            
                68.80
             |               
            
                67.90
             |                           
            
                68.60
             | 
            
                68.34
             |                     
            
                38.57
             |                                 
            
                26,530
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/11/2020
             | 
            
                +1.10 / +1.64%
             |             
            
                66.90
             |           
            
                68.00
             |               
            
                66.90
             |                           
            
                68.00
             | 
            
                67.38
             |                     
            
                38.24
             |                                 
            
                21,860
             |            
            
                 
             |                                       
         
    
        
            | 
                2/10/2020
             | 
            
                -0.20 / -0.30%
             |             
            
                68.00
             |           
            
                68.00
             |               
            
                66.80
             |                           
            
                66.90
             | 
            
                66.98
             |                     
            
                37.62
             |                                 
            
                9,480
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/7/2020
             | 
            
                -0.90 / -1.32%
             |             
            
                68.00
             |           
            
                68.10
             |               
            
                67.10
             |                           
            
                67.10
             | 
            
                67.66
             |                     
            
                37.73
             |                                 
            
                18,710
             |            
            
                 
             |                                       
         
    
        
            | 
                2/6/2020
             | 
            
                0.00 / 0.00%
             |             
            
                67.00
             |           
            
                68.50
             |               
            
                67.00
             |                           
            
                68.00
             | 
            
                68.02
             |                     
            
                38.24
             |                                 
            
                28,550
             |  
            
                 
             |                                                              
             
    
         
    
    
 |