| 
                 
                    Closing price on 5/15/2020
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    46.60 | 
                 
                
                    | High | 
                    46.80 | 
                 
                
                    | Low | 
                    44.70 | 
                     
                
                    | Volume | 
                    342,130 | 
                                 
                
                    | Split-adjusted Price | 
                    25.91 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PTB Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                5/15/2020
             | 
            
                -1.55 / -3.33%
             |             
            
                46.60
             |           
            
                46.80
             |               
            
                44.70
             |                           
            
                45.00
             | 
            
                45.32
             |                     
            
                25.91
             |                                 
            
                342,130
             |            
            
                 
             |                                       
         
    
        
            | 
                5/14/2020
             | 
            
                -1.25 / -2.62%
             |             
            
                47.30
             |           
            
                47.50
             |               
            
                46.00
             |                           
            
                46.55
             | 
            
                46.65
             |                     
            
                26.80
             |                                 
            
                257,890
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/13/2020
             | 
            
                -0.60 / -1.24%
             |             
            
                47.90
             |           
            
                48.90
             |               
            
                47.70
             |                           
            
                47.80
             | 
            
                48.26
             |                     
            
                27.52
             |                                 
            
                162,920
             |            
            
                 
             |                                       
         
    
        
            | 
                5/12/2020
             | 
            
                +0.90 / +1.89%
             |             
            
                47.50
             |           
            
                48.40
             |               
            
                46.70
             |                           
            
                48.40
             | 
            
                47.81
             |                     
            
                27.87
             |                                 
            
                295,060
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/11/2020
             | 
            
                +0.50 / +1.06%
             |             
            
                46.70
             |           
            
                47.50
             |               
            
                46.50
             |                           
            
                47.50
             | 
            
                47.03
             |                     
            
                27.35
             |                                 
            
                394,460
             |            
            
                 
             |                                       
         
    
        
            | 
                5/8/2020
             | 
            
                +0.50 / +1.08%
             |             
            
                46.50
             |           
            
                47.00
             |               
            
                46.00
             |                           
            
                47.00
             | 
            
                46.71
             |                     
            
                27.06
             |                                 
            
                263,920
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/7/2020
             | 
            
                +0.45 / +0.98%
             |             
            
                46.20
             |           
            
                46.50
             |               
            
                45.60
             |                           
            
                46.50
             | 
            
                46.14
             |                     
            
                26.77
             |                                 
            
                300,970
             |            
            
                 
             |                                       
         
    
        
            | 
                5/6/2020
             | 
            
                +2.05 / +4.66%
             |             
            
                44.00
             |           
            
                46.50
             |               
            
                43.70
             |                           
            
                46.05
             | 
            
                45.54
             |                     
            
                26.51
             |                                 
            
                475,870
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/5/2020
             | 
            
                +0.30 / +0.69%
             |             
            
                43.70
             |           
            
                44.00
             |               
            
                42.50
             |                           
            
                44.00
             | 
            
                43.61
             |                     
            
                25.33
             |                                 
            
                123,090
             |            
            
                 
             |                                       
         
    
        
            | 
                5/4/2020
             | 
            
                0.00 / 0.00%
             |             
            
                43.70
             |           
            
                43.70
             |               
            
                42.70
             |                           
            
                43.70
             | 
            
                43.41
             |                     
            
                25.16
             |                                 
            
                144,050
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/29/2020
             | 
            
                +0.30 / +0.69%
             |             
            
                43.40
             |           
            
                43.70
             |               
            
                42.10
             |                           
            
                43.70
             | 
            
                43.36
             |                     
            
                25.16
             |                                 
            
                124,990
             |            
            
                 
             |                                       
         
    
        
            | 
                4/28/2020
             | 
            
                -0.20 / -0.46%
             |             
            
                44.00
             |           
            
                44.00
             |               
            
                42.00
             |                           
            
                43.40
             | 
            
                42.42
             |                     
            
                24.99
             |                                 
            
                146,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/27/2020
             | 
            
                +1.10 / +2.59%
             |             
            
                42.00
             |           
            
                43.90
             |               
            
                42.00
             |                           
            
                43.60
             | 
            
                43.01
             |                     
            
                25.10
             |                                 
            
                98,010
             |            
            
                 
             |                                       
         
    
        
            | 
                4/24/2020
             | 
            
                0.00 / 0.00%
             |             
            
                43.50
             |           
            
                43.50
             |               
            
                41.00
             |                           
            
                42.50
             | 
            
                41.83
             |                     
            
                24.47
             |                                 
            
                480,150
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/23/2020
             | 
            
                -0.90 / -2.07%
             |             
            
                43.50
             |           
            
                45.00
             |               
            
                42.30
             |                           
            
                42.50
             | 
            
                42.94
             |                     
            
                24.47
             |                                 
            
                274,780
             |            
            
                 
             |                                       
         
    
        
            | 
                4/22/2020
             | 
            
                -1.00 / -2.25%
             |             
            
                42.00
             |           
            
                43.50
             |               
            
                42.00
             |                           
            
                43.40
             | 
            
                42.94
             |                     
            
                24.99
             |                                 
            
                347,560
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/21/2020
             | 
            
                -1.35 / -2.95%
             |             
            
                45.00
             |           
            
                45.65
             |               
            
                42.60
             |                           
            
                44.40
             | 
            
                43.92
             |                     
            
                25.56
             |                                 
            
                397,890
             |            
            
                 
             |                                       
         
    
        
            | 
                4/20/2020
             | 
            
                +2.05 / +4.69%
             |             
            
                43.80
             |           
            
                46.50
             |               
            
                43.80
             |                           
            
                45.75
             | 
            
                45.61
             |                     
            
                26.34
             |                                 
            
                330,070
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/17/2020
             | 
            
                +0.35 / +0.81%
             |             
            
                43.35
             |           
            
                44.00
             |               
            
                43.35
             |                           
            
                43.70
             | 
            
                43.52
             |                     
            
                25.16
             |                                 
            
                274,710
             |            
            
                 
             |                                       
         
    
        
            | 
                4/16/2020
             | 
            
                -0.25 / -0.57%
             |             
            
                43.60
             |           
            
                43.60
             |               
            
                42.70
             |                           
            
                43.35
             | 
            
                43.11
             |                     
            
                24.96
             |                                 
            
                197,970
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/15/2020
             | 
            
                +0.75 / +1.75%
             |             
            
                42.80
             |           
            
                44.15
             |               
            
                42.40
             |                           
            
                43.60
             | 
            
                43.32
             |                     
            
                25.10
             |                                 
            
                279,040
             |            
            
                 
             |                                       
         
    
        
            | 
                4/14/2020
             | 
            
                -0.55 / -1.27%
             |             
            
                43.40
             |           
            
                43.60
             |               
            
                42.00
             |                           
            
                42.85
             | 
            
                42.51
             |                     
            
                24.09
             |                                 
            
                172,560
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/13/2020
             | 
            
                +0.60 / +1.40%
             |             
            
                42.80
             |           
            
                44.00
             |               
            
                42.00
             |                           
            
                43.40
             | 
            
                43.02
             |                     
            
                24.40
             |                                 
            
                243,910
             |            
            
                 
             |                                       
         
    
        
            | 
                4/10/2020
             | 
            
                -0.20 / -0.47%
             |             
            
                43.00
             |           
            
                43.50
             |               
            
                41.50
             |                           
            
                42.80
             | 
            
                42.19
             |                     
            
                24.07
             |                                 
            
                114,180
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/9/2020
             | 
            
                +1.10 / +2.63%
             |             
            
                41.80
             |           
            
                43.50
             |               
            
                41.30
             |                           
            
                43.00
             | 
            
                42.36
             |                     
            
                24.18
             |                                 
            
                241,730
             |            
            
                 
             |                                       
         
    
        
            | 
                4/8/2020
             | 
            
                -2.10 / -4.77%
             |             
            
                43.50
             |           
            
                43.50
             |               
            
                41.80
             |                           
            
                41.90
             | 
            
                42.35
             |                     
            
                23.56
             |                                 
            
                226,530
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/7/2020
             | 
            
                +1.90 / +4.51%
             |             
            
                45.00
             |           
            
                45.00
             |               
            
                42.00
             |                           
            
                44.00
             | 
            
                43.73
             |                     
            
                24.74
             |                                 
            
                349,090
             |            
            
                 
             |                                       
         
    
        
            | 
                4/6/2020
             | 
            
                +2.75 / +6.99%
             |             
            
                42.00
             |           
            
                42.10
             |               
            
                41.00
             |                           
            
                42.10
             | 
            
                41.99
             |                     
            
                23.67
             |                                 
            
                171,270
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/3/2020
             | 
            
                +2.55 / +6.93%
             |             
            
                38.70
             |           
            
                39.35
             |               
            
                38.00
             |                           
            
                39.35
             | 
            
                39.17
             |                     
            
                22.13
             |                                 
            
                307,780
             |            
            
                 
             |                                       
         
    
        
            | 
                4/1/2020
             | 
            
                +2.40 / +6.98%
             |             
            
                34.00
             |           
            
                36.80
             |               
            
                34.00
             |                           
            
                36.80
             | 
            
                36.15
             |                     
            
                20.69
             |                                 
            
                151,300
             |  
            
                 
             |                                                              
             
    
         
    
    
 |