| 
                 
                    Closing price on 10/30/2015
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    26.30 | 
                 
                
                    | High | 
                    27.70 | 
                 
                
                    | Low | 
                    26.00 | 
                     
                
                    | Volume | 
                    532,267 | 
                                 
                
                    | Split-adjusted Price | 
                    13.65 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PTI Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                10/30/2015
             | 
            
                +1.00 / +3.79%
             |             
            
                26.30
             |           
            
                27.70
             |               
            
                26.00
             |                           
            
                27.40
             | 
            
                26.69
             |                     
            
                13.65
             |                                 
            
                532,267
             |            
            
                 
             |                                       
         
    
        
            | 
                10/29/2015
             | 
            
                +0.80 / +3.13%
             |             
            
                25.60
             |           
            
                26.50
             |               
            
                25.00
             |                           
            
                26.40
             | 
            
                25.90
             |                     
            
                13.16
             |                                 
            
                244,290
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/28/2015
             | 
            
                -0.20 / -0.78%
             |             
            
                25.80
             |           
            
                26.00
             |               
            
                25.00
             |                           
            
                25.60
             | 
            
                25.53
             |                     
            
                12.76
             |                                 
            
                107,972
             |            
            
                 
             |                                       
         
    
        
            | 
                10/27/2015
             | 
            
                +0.10 / +0.39%
             |             
            
                25.70
             |           
            
                26.00
             |               
            
                24.60
             |                           
            
                25.80
             | 
            
                25.61
             |                     
            
                12.86
             |                                 
            
                281,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/26/2015
             | 
            
                +0.30 / +1.18%
             |             
            
                25.40
             |           
            
                25.70
             |               
            
                25.10
             |                           
            
                25.70
             | 
            
                25.43
             |                     
            
                12.81
             |                                 
            
                144,248
             |            
            
                 
             |                                       
         
    
        
            | 
                10/23/2015
             | 
            
                -0.60 / -2.31%
             |             
            
                25.90
             |           
            
                26.00
             |               
            
                25.20
             |                           
            
                25.40
             | 
            
                25.66
             |                     
            
                12.66
             |                                 
            
                181,789
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/22/2015
             | 
            
                +0.70 / +2.77%
             |             
            
                25.30
             |           
            
                26.30
             |               
            
                24.70
             |                           
            
                26.00
             | 
            
                25.66
             |                     
            
                12.96
             |                                 
            
                414,088
             |            
            
                 
             |                                       
         
    
        
            | 
                10/21/2015
             | 
            
                -0.70 / -2.69%
             |             
            
                25.70
             |           
            
                26.00
             |               
            
                24.90
             |                           
            
                25.30
             | 
            
                25.39
             |                     
            
                12.61
             |                                 
            
                179,109
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/20/2015
             | 
            
                +0.80 / +3.17%
             |             
            
                24.60
             |           
            
                26.00
             |               
            
                24.40
             |                           
            
                26.00
             | 
            
                25.32
             |                     
            
                12.96
             |                                 
            
                344,228
             |            
            
                 
             |                                       
         
    
        
            | 
                10/19/2015
             | 
            
                +1.40 / +5.88%
             |             
            
                23.90
             |           
            
                25.50
             |               
            
                23.90
             |                           
            
                25.20
             | 
            
                24.83
             |                     
            
                12.56
             |                                 
            
                478,247
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/16/2015
             | 
            
                +2.10 / +9.68%
             |             
            
                21.80
             |           
            
                23.80
             |               
            
                21.00
             |                           
            
                23.80
             | 
            
                23.01
             |                     
            
                11.86
             |                                 
            
                679,730
             |            
            
                 
             |                                       
         
    
        
            | 
                10/15/2015
             | 
            
                +1.50 / +7.43%
             |             
            
                21.00
             |           
            
                21.70
             |               
            
                21.00
             |                           
            
                21.70
             | 
            
                21.46
             |                     
            
                10.81
             |                                 
            
                207,163
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/14/2015
             | 
            
                -0.30 / -1.46%
             |             
            
                20.30
             |           
            
                20.60
             |               
            
                20.20
             |                           
            
                20.20
             | 
            
                20.53
             |                     
            
                10.07
             |                                 
            
                46,500
             |            
            
                 
             |                                       
         
    
        
            | 
                10/13/2015
             | 
            
                -0.30 / -1.44%
             |             
            
                20.80
             |           
            
                21.50
             |               
            
                20.00
             |                           
            
                20.50
             | 
            
                20.80
             |                     
            
                10.22
             |                                 
            
                71,246
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/12/2015
             | 
            
                -0.20 / -0.95%
             |             
            
                20.70
             |           
            
                21.40
             |               
            
                20.70
             |                           
            
                20.80
             | 
            
                21.04
             |                     
            
                10.37
             |                                 
            
                27,700
             |            
            
                 
             |                                       
         
    
        
            | 
                10/9/2015
             | 
            
                -0.20 / -0.94%
             |             
            
                21.20
             |           
            
                21.30
             |               
            
                20.70
             |                           
            
                21.00
             | 
            
                21.00
             |                     
            
                10.47
             |                                 
            
                73,910
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/8/2015
             | 
            
                +0.20 / +0.95%
             |             
            
                21.00
             |           
            
                21.90
             |               
            
                21.00
             |                           
            
                21.20
             | 
            
                21.50
             |                     
            
                10.57
             |                                 
            
                117,657
             |            
            
                 
             |                                       
         
    
        
            | 
                10/7/2015
             | 
            
                +0.60 / +2.94%
             |             
            
                20.40
             |           
            
                21.20
             |               
            
                20.40
             |                           
            
                21.00
             | 
            
                20.94
             |                     
            
                10.47
             |                                 
            
                70,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/6/2015
             | 
            
                +0.70 / +3.55%
             |             
            
                20.40
             |           
            
                20.80
             |               
            
                19.80
             |                           
            
                20.40
             | 
            
                20.35
             |                     
            
                10.17
             |                                 
            
                124,371
             |            
            
                 
             |                                       
         
    
        
            | 
                10/5/2015
             | 
            
                0.00 / 0.00%
             |             
            
                19.90
             |           
            
                19.90
             |               
            
                19.70
             |                           
            
                19.70
             | 
            
                19.80
             |                     
            
                9.82
             |                                 
            
                8,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/2/2015
             | 
            
                -0.40 / -1.99%
             |             
            
                20.00
             |           
            
                20.10
             |               
            
                19.70
             |                           
            
                19.70
             | 
            
                19.84
             |                     
            
                9.82
             |                                 
            
                35,600
             |            
            
                 
             |                                       
         
    
        
            | 
                10/1/2015
             | 
            
                +0.20 / +1.01%
             |             
            
                20.10
             |           
            
                20.30
             |               
            
                19.90
             |                           
            
                20.10
             | 
            
                20.09
             |                     
            
                10.02
             |                                 
            
                17,960
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/30/2015
             | 
            
                +0.10 / +0.51%
             |             
            
                20.00
             |           
            
                20.20
             |               
            
                19.80
             |                           
            
                19.90
             | 
            
                19.92
             |                     
            
                9.92
             |                                 
            
                18,800
             |            
            
                 
             |                                       
         
    
        
            | 
                9/29/2015
             | 
            
                -0.50 / -2.46%
             |             
            
                20.10
             |           
            
                20.10
             |               
            
                19.80
             |                           
            
                19.80
             | 
            
                19.93
             |                     
            
                9.87
             |                                 
            
                10,650
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/28/2015
             | 
            
                +0.80 / +4.10%
             |             
            
                19.50
             |           
            
                20.30
             |               
            
                19.50
             |                           
            
                20.30
             | 
            
                19.88
             |                     
            
                10.12
             |                                 
            
                27,287
             |            
            
                 
             |                                       
         
    
        
            | 
                9/25/2015
             | 
            
                -1.00 / -4.88%
             |             
            
                20.20
             |           
            
                20.30
             |               
            
                19.50
             |                           
            
                19.50
             | 
            
                19.96
             |                     
            
                9.72
             |                                 
            
                19,629
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/24/2015
             | 
            
                -0.30 / -1.44%
             |             
            
                20.80
             |           
            
                20.90
             |               
            
                20.50
             |                           
            
                20.50
             | 
            
                20.74
             |                     
            
                10.22
             |                                 
            
                19,400
             |            
            
                 
             |                                       
         
    
        
            | 
                9/23/2015
             | 
            
                -0.20 / -0.95%
             |             
            
                20.90
             |           
            
                20.90
             |               
            
                20.60
             |                           
            
                20.80
             | 
            
                20.75
             |                     
            
                10.37
             |                                 
            
                17,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/22/2015
             | 
            
                0.00 / 0.00%
             |             
            
                21.00
             |           
            
                21.10
             |               
            
                20.90
             |                           
            
                21.00
             | 
            
                21.00
             |                     
            
                10.47
             |                                 
            
                19,800
             |            
            
                 
             |                                       
         
    
        
            | 
                9/21/2015
             | 
            
                +0.90 / +4.48%
             |             
            
                20.10
             |           
            
                21.00
             |               
            
                20.10
             |                           
            
                21.00
             | 
            
                20.41
             |                     
            
                10.47
             |                                 
            
                40,660
             |  
            
                 
             |                                                              
             
    
         
    
    
 |