| 
                 
                    Closing price on 8/31/2015
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    21.80 | 
                 
                
                    | High | 
                    22.30 | 
                 
                
                    | Low | 
                    21.00 | 
                     
                
                    | Volume | 
                    87,988 | 
                                 
                
                    | Split-adjusted Price | 
                    10.47 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PTI Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                8/31/2015
             | 
            
                -1.30 / -5.83%
             |             
            
                21.80
             |           
            
                22.30
             |               
            
                21.00
             |                           
            
                21.00
             | 
            
                21.75
             |                     
            
                10.47
             |                                 
            
                87,988
             |            
            
                 
             |                                       
         
    
        
            | 
                8/28/2015
             | 
            
                +0.70 / +3.24%
             |             
            
                21.40
             |           
            
                22.30
             |               
            
                21.00
             |                           
            
                22.30
             | 
            
                21.71
             |                     
            
                11.11
             |                                 
            
                211,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/27/2015
             | 
            
                +0.90 / +4.35%
             |             
            
                21.50
             |           
            
                22.00
             |               
            
                20.50
             |                           
            
                21.60
             | 
            
                21.38
             |                     
            
                10.76
             |                                 
            
                104,962
             |            
            
                 
             |                                       
         
    
        
            | 
                8/26/2015
             | 
            
                +1.00 / +5.08%
             |             
            
                20.50
             |           
            
                20.80
             |               
            
                20.50
             |                           
            
                20.70
             | 
            
                20.64
             |                     
            
                10.32
             |                                 
            
                20,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/25/2015
             | 
            
                +0.30 / +1.55%
             |             
            
                19.70
             |           
            
                19.70
             |               
            
                19.70
             |                           
            
                19.70
             | 
            
                19.70
             |                     
            
                9.82
             |                                 
            
                10,144
             |            
            
                 
             |                                       
         
    
        
            | 
                8/24/2015
             | 
            
                -2.10 / -9.77%
             |             
            
                19.80
             |           
            
                19.80
             |               
            
                19.40
             |                           
            
                19.40
             | 
            
                19.54
             |                     
            
                9.67
             |                                 
            
                17,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/21/2015
             | 
            
                +0.40 / +1.90%
             |             
            
                21.00
             |           
            
                21.50
             |               
            
                20.20
             |                           
            
                21.50
             | 
            
                20.67
             |                     
            
                10.71
             |                                 
            
                54,100
             |            
            
                 
             |                                       
         
    
        
            | 
                8/20/2015
             | 
            
                -0.30 / -1.40%
             |             
            
                21.00
             |           
            
                21.80
             |               
            
                21.00
             |                           
            
                21.10
             | 
            
                21.57
             |                     
            
                10.52
             |                                 
            
                83,860
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/19/2015
             | 
            
                +0.90 / +4.39%
             |             
            
                20.50
             |           
            
                21.50
             |               
            
                20.00
             |                           
            
                21.40
             | 
            
                20.67
             |                     
            
                10.66
             |                                 
            
                90,700
             |            
            
                 
             |                                       
         
    
        
            | 
                8/18/2015
             | 
            
                +0.70 / +3.54%
             |             
            
                20.30
             |           
            
                20.60
             |               
            
                20.30
             |                           
            
                20.50
             | 
            
                20.42
             |                     
            
                10.22
             |                                 
            
                14,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/17/2015
             | 
            
                -1.10 / -5.26%
             |             
            
                20.20
             |           
            
                20.80
             |               
            
                19.80
             |                           
            
                19.80
             | 
            
                20.36
             |                     
            
                9.87
             |                                 
            
                39,400
             |            
            
                 
             |                                       
         
    
        
            | 
                8/14/2015
             | 
            
                +0.20 / +0.97%
             |             
            
                20.60
             |           
            
                21.00
             |               
            
                20.40
             |                           
            
                20.90
             | 
            
                20.72
             |                     
            
                10.42
             |                                 
            
                68,862
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/13/2015
             | 
            
                -1.90 / -8.41%
             |             
            
                22.50
             |           
            
                22.50
             |               
            
                20.50
             |                           
            
                20.70
             | 
            
                21.47
             |                     
            
                10.32
             |                                 
            
                64,100
             |            
            
                 
             |                                       
         
    
        
            | 
                8/12/2015
             | 
            
                -0.10 / -0.44%
             |             
            
                22.00
             |           
            
                22.60
             |               
            
                21.50
             |                           
            
                22.60
             | 
            
                22.09
             |                     
            
                11.26
             |                                 
            
                37,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/11/2015
             | 
            
                0.00 / 0.00%
             |             
            
                23.00
             |           
            
                23.10
             |               
            
                22.50
             |                           
            
                22.70
             | 
            
                22.70
             |                     
            
                11.31
             |                                 
            
                79,481
             |            
            
                 
             |                                       
         
    
        
            | 
                8/10/2015
             | 
            
                +1.90 / +9.13%
             |             
            
                21.50
             |           
            
                22.80
             |               
            
                21.10
             |                           
            
                22.70
             | 
            
                22.09
             |                     
            
                11.31
             |                                 
            
                167,032
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/7/2015
             | 
            
                +0.80 / +4.00%
             |             
            
                20.10
             |           
            
                20.80
             |               
            
                20.00
             |                           
            
                20.80
             | 
            
                20.42
             |                     
            
                10.37
             |                                 
            
                68,400
             |            
            
                 
             |                                       
         
    
        
            | 
                8/6/2015
             | 
            
                -0.80 / -3.85%
             |             
            
                19.70
             |           
            
                20.60
             |               
            
                19.70
             |                           
            
                20.00
             | 
            
                20.34
             |                     
            
                9.97
             |                                 
            
                33,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/5/2015
             | 
            
                -0.20 / -0.95%
             |             
            
                20.00
             |           
            
                20.90
             |               
            
                20.00
             |                           
            
                20.80
             | 
            
                20.78
             |                     
            
                10.37
             |                                 
            
                10,012
             |            
            
                 
             |                                       
         
    
        
            | 
                8/4/2015
             | 
            
                +1.50 / +7.69%
             |             
            
                19.00
             |           
            
                21.00
             |               
            
                19.00
             |                           
            
                21.00
             | 
            
                19.37
             |                     
            
                10.47
             |                                 
            
                4,835
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/3/2015
             | 
            
                -2.10 / -9.72%
             |             
            
                20.60
             |           
            
                20.60
             |               
            
                19.50
             |                           
            
                19.50
             | 
            
                20.05
             |                     
            
                9.72
             |                                 
            
                31,832
             |            
            
                 
             |                                       
         
    
        
            | 
                7/31/2015
             | 
            
                -1.20 / -5.26%
             |             
            
                22.20
             |           
            
                22.20
             |               
            
                21.60
             |                           
            
                21.60
             | 
            
                21.88
             |                     
            
                10.76
             |                                 
            
                36,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/30/2015
             | 
            
                0.00 / 0.00%
             |             
            
                22.50
             |           
            
                22.90
             |               
            
                22.40
             |                           
            
                22.80
             | 
            
                22.60
             |                     
            
                11.36
             |                                 
            
                86,636
             |            
            
                 
             |                                       
         
    
        
            | 
                7/29/2015
             | 
            
                +0.80 / +3.64%
             |             
            
                21.80
             |           
            
                23.50
             |               
            
                20.60
             |                           
            
                22.80
             | 
            
                22.36
             |                     
            
                11.36
             |                                 
            
                243,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/28/2015
             | 
            
                -1.00 / -4.35%
             |             
            
                23.80
             |           
            
                23.80
             |               
            
                21.00
             |                           
            
                22.00
             | 
            
                23.00
             |                     
            
                10.96
             |                                 
            
                172,350
             |            
            
                 
             |                                       
         
    
        
            | 
                7/27/2015
             | 
            
                +1.30 / +5.99%
             |             
            
                21.80
             |           
            
                23.10
             |               
            
                21.70
             |                           
            
                23.00
             | 
            
                22.40
             |                     
            
                11.46
             |                                 
            
                215,851
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/24/2015
             | 
            
                +1.50 / +7.43%
             |             
            
                20.20
             |           
            
                21.80
             |               
            
                19.90
             |                           
            
                21.70
             | 
            
                21.03
             |                     
            
                10.81
             |                                 
            
                360,632
             |            
            
                 
             |                                       
         
    
        
            | 
                7/23/2015
             | 
            
                +1.30 / +6.88%
             |             
            
                19.40
             |           
            
                20.50
             |               
            
                18.80
             |                           
            
                20.20
             | 
            
                19.82
             |                     
            
                10.07
             |                                 
            
                256,146
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/22/2015
             | 
            
                +1.70 / +9.88%
             |             
            
                17.50
             |           
            
                18.90
             |               
            
                17.10
             |                           
            
                18.90
             | 
            
                18.30
             |                     
            
                9.42
             |                                 
            
                51,000
             |            
            
                 
             |                                       
         
    
        
            | 
                7/21/2015
             | 
            
                -0.50 / -2.82%
             |             
            
                17.60
             |           
            
                18.00
             |               
            
                17.20
             |                           
            
                17.20
             | 
            
                17.56
             |                     
            
                8.57
             |                                 
            
                75,010
             |  
            
                 
             |                                                              
             
    
         
    
    
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