| 
                 
                    Closing price on 5/11/2016
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    23.20 | 
                 
                
                    | High | 
                    23.50 | 
                 
                
                    | Low | 
                    23.10 | 
                     
                
                    | Volume | 
                    11,500 | 
                                 
                
                    | Split-adjusted Price | 
                    11.71 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PTI Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                5/11/2016
             | 
            
                +0.40 / +1.73%
             |             
            
                23.20
             |           
            
                23.50
             |               
            
                23.10
             |                           
            
                23.50
             | 
            
                23.15
             |                     
            
                11.71
             |                                 
            
                11,500
             |            
            
                 
             |                                       
         
    
        
            | 
                5/10/2016
             | 
            
                0.00 / 0.00%
             |             
            
                23.10
             |           
            
                23.40
             |               
            
                23.00
             |                           
            
                23.10
             | 
            
                23.16
             |                     
            
                11.51
             |                                 
            
                28,811
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/9/2016
             | 
            
                -0.20 / -0.86%
             |             
            
                23.10
             |           
            
                23.10
             |               
            
                23.10
             |                           
            
                23.10
             | 
            
                23.10
             |                     
            
                11.51
             |                                 
            
                1,340
             |            
            
                 
             |                                       
         
    
        
            | 
                5/6/2016
             | 
            
                -0.10 / -0.43%
             |             
            
                23.40
             |           
            
                23.50
             |               
            
                23.00
             |                           
            
                23.30
             | 
            
                23.19
             |                     
            
                11.61
             |                                 
            
                13,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/5/2016
             | 
            
                +0.90 / +4.00%
             |             
            
                22.00
             |           
            
                23.50
             |               
            
                22.00
             |                           
            
                23.40
             | 
            
                23.35
             |                     
            
                11.66
             |                                 
            
                44,700
             |            
            
                 
             |                                       
         
    
        
            | 
                5/4/2016
             | 
            
                -0.60 / -2.60%
             |             
            
                22.50
             |           
            
                22.50
             |               
            
                22.50
             |                           
            
                22.50
             | 
            
                22.50
             |                     
            
                11.21
             |                                 
            
                3,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/29/2016
             | 
            
                +2.10 / +10.00%
             |             
            
                21.30
             |           
            
                23.10
             |               
            
                21.30
             |                           
            
                23.10
             | 
            
                22.66
             |                     
            
                11.51
             |                                 
            
                14,100
             |            
            
                 
             |                                       
         
    
        
            | 
                4/28/2016
             | 
            
                -0.20 / -0.94%
             |             
            
                20.00
             |           
            
                21.10
             |               
            
                19.10
             |                           
            
                21.00
             | 
            
                20.76
             |                     
            
                10.47
             |                                 
            
                14,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/27/2016
             | 
            
                -1.40 / -6.19%
             |             
            
                21.30
             |           
            
                21.30
             |               
            
                21.20
             |                           
            
                21.20
             | 
            
                21.24
             |                     
            
                10.57
             |                                 
            
                3,000
             |            
            
                 
             |                                       
         
    
        
            | 
                4/26/2016
             | 
            
                +0.30 / +1.35%
             |             
            
                22.60
             |           
            
                22.60
             |               
            
                22.60
             |                           
            
                22.60
             | 
            
                22.60
             |                     
            
                11.26
             |                                 
            
                21,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/25/2016
             | 
            
                -0.20 / -0.89%
             |             
            
                21.70
             |           
            
                22.30
             |               
            
                21.60
             |                           
            
                22.30
             | 
            
                21.96
             |                     
            
                11.11
             |                                 
            
                5,100
             |            
            
                 
             |                                       
         
    
        
            | 
                4/22/2016
             | 
            
                +0.20 / +0.90%
             |             
            
                22.50
             |           
            
                22.50
             |               
            
                22.50
             |                           
            
                22.50
             | 
            
                22.50
             |                     
            
                11.21
             |                                 
            
                1,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/21/2016
             | 
            
                +0.10 / +0.45%
             |             
            
                22.00
             |           
            
                22.50
             |               
            
                21.00
             |                           
            
                22.30
             | 
            
                21.93
             |                     
            
                11.11
             |                                 
            
                4,601
             |            
            
                 
             |                                       
         
    
        
            | 
                4/20/2016
             | 
            
                0.00 / 0.00%
             |             
            
                22.20
             |           
            
                22.60
             |               
            
                21.90
             |                           
            
                22.20
             | 
            
                22.49
             |                     
            
                11.06
             |                                 
            
                31,512
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/19/2016
             | 
            
                -0.50 / -2.20%
             |             
            
                22.20
             |           
            
                22.20
             |               
            
                22.20
             |                           
            
                22.20
             | 
            
                22.20
             |                     
            
                11.06
             |                                 
            
                220
             |            
            
                 
             |                                       
         
    
        
            | 
                4/15/2016
             | 
            
                -0.80 / -3.40%
             |             
            
                22.20
             |           
            
                23.50
             |               
            
                22.20
             |                           
            
                22.70
             | 
            
                23.07
             |                     
            
                11.31
             |                                 
            
                666,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/14/2016
             | 
            
                +0.60 / +2.62%
             |             
            
                22.80
             |           
            
                23.50
             |               
            
                21.70
             |                           
            
                23.50
             | 
            
                21.99
             |                     
            
                11.71
             |                                 
            
                87,000
             |            
            
                 
             |                                       
         
    
        
            | 
                4/13/2016
             | 
            
                -0.10 / -0.43%
             |             
            
                22.70
             |           
            
                22.90
             |               
            
                21.00
             |                           
            
                22.90
             | 
            
                22.18
             |                     
            
                11.41
             |                                 
            
                5,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/12/2016
             | 
            
                0.00 / 0.00%
             |             
            
                22.80
             |           
            
                23.00
             |               
            
                21.60
             |                           
            
                23.00
             | 
            
                22.85
             |                     
            
                11.46
             |                                 
            
                22,200
             |            
            
                 
             |                                       
         
    
        
            | 
                4/11/2016
             | 
            
                +0.10 / +0.44%
             |             
            
                22.60
             |           
            
                23.00
             |               
            
                22.50
             |                           
            
                23.00
             | 
            
                22.61
             |                     
            
                11.46
             |                                 
            
                3,775
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/8/2016
             | 
            
                +0.50 / +2.23%
             |             
            
                22.70
             |           
            
                22.90
             |               
            
                22.70
             |                           
            
                22.90
             | 
            
                22.79
             |                     
            
                11.41
             |                                 
            
                5,500
             |            
            
                 
             |                                       
         
    
        
            | 
                4/7/2016
             | 
            
                +0.30 / +1.36%
             |             
            
                21.90
             |           
            
                22.40
             |               
            
                21.90
             |                           
            
                22.40
             | 
            
                22.12
             |                     
            
                11.16
             |                                 
            
                2,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/6/2016
             | 
            
                -0.50 / -2.21%
             |             
            
                22.60
             |           
            
                22.60
             |               
            
                22.00
             |                           
            
                22.10
             | 
            
                22.28
             |                     
            
                11.01
             |                                 
            
                14,700
             |            
            
                 
             |                                       
         
    
        
            | 
                4/5/2016
             | 
            
                0.00 / 0.00%
             |             
            
                22.60
             |           
            
                22.90
             |               
            
                22.60
             |                           
            
                22.60
             | 
            
                22.60
             |                     
            
                11.26
             |                                 
            
                65,560
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/4/2016
             | 
            
                0.00 / 0.00%
             |             
            
                22.60
             |           
            
                23.00
             |               
            
                22.60
             |                           
            
                22.60
             | 
            
                22.65
             |                     
            
                11.26
             |                                 
            
                7,400
             |            
            
                 
             |                                       
         
    
        
            | 
                4/1/2016
             | 
            
                0.00 / 0.00%
             |             
            
                22.60
             |           
            
                22.60
             |               
            
                22.60
             |                           
            
                22.60
             | 
            
                22.60
             |                     
            
                11.26
             |                                 
            
                1,415,662
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/31/2016
             | 
            
                0.00 / 0.00%
             |             
            
                22.70
             |           
            
                22.70
             |               
            
                22.60
             |                           
            
                22.60
             | 
            
                22.70
             |                     
            
                11.26
             |                                 
            
                7,985
             |            
            
                 
             |                                       
         
    
        
            | 
                3/30/2016
             | 
            
                0.00 / 0.00%
             |             
            
                22.60
             |           
            
                22.60
             |               
            
                22.60
             |                           
            
                22.60
             | 
            
                22.60
             |                     
            
                11.26
             |                                 
            
                6,460
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/29/2016
             | 
            
                -0.10 / -0.44%
             |             
            
                22.70
             |           
            
                22.80
             |               
            
                22.60
             |                           
            
                22.60
             | 
            
                22.70
             |                     
            
                11.26
             |                                 
            
                6,300
             |            
            
                 
             |                                       
         
    
        
            | 
                3/28/2016
             | 
            
                +0.10 / +0.44%
             |             
            
                22.60
             |           
            
                22.70
             |               
            
                22.60
             |                           
            
                22.70
             | 
            
                22.68
             |                     
            
                11.31
             |                                 
            
                4,000
             |  
            
                 
             |                                                              
             
    
         
    
    
 |