| 
                 
                    Closing price on 6/4/2013
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    11.40 | 
                 
                
                    | High | 
                    11.70 | 
                 
                
                    | Low | 
                    11.00 | 
                     
                
                    | Volume | 
                    1,044,630 | 
                                 
                
                    | Split-adjusted Price | 
                    6.86 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PXS Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                6/4/2013
             | 
            
                -0.40 / -3.48%
             |             
            
                11.40
             |           
            
                11.70
             |               
            
                11.00
             |                           
            
                11.10
             | 
            
                11.10
             |                     
            
                6.86
             |                                 
            
                1,044,630
             |            
            
                 
             |                                       
         
    
        
            | 
                6/3/2013
             | 
            
                +0.40 / +3.60%
             |             
            
                11.50
             |           
            
                11.80
             |               
            
                11.20
             |                           
            
                11.50
             | 
            
                11.50
             |                     
            
                7.11
             |                                 
            
                2,022,080
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/31/2013
             | 
            
                +0.70 / +6.73%
             |             
            
                11.10
             |           
            
                11.10
             |               
            
                11.10
             |                           
            
                11.10
             | 
            
                11.10
             |                     
            
                6.86
             |                                 
            
                294,440
             |            
            
                 
             |                                       
         
    
        
            | 
                5/30/2013
             | 
            
                +0.60 / +6.12%
             |             
            
                10.40
             |           
            
                10.40
             |               
            
                10.30
             |                           
            
                10.40
             | 
            
                10.40
             |                     
            
                6.43
             |                                 
            
                1,310,330
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/29/2013
             | 
            
                +0.60 / +6.52%
             |             
            
                9.30
             |           
            
                9.80
             |               
            
                9.30
             |                           
            
                9.80
             | 
            
                9.80
             |                     
            
                6.06
             |                                 
            
                796,370
             |            
            
                 
             |                                       
         
    
        
            | 
                5/28/2013
             | 
            
                0.00 / 0.00%
             |             
            
                9.20
             |           
            
                9.20
             |               
            
                9.00
             |                           
            
                9.20
             | 
            
                9.20
             |                     
            
                5.69
             |                                 
            
                230,660
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/27/2013
             | 
            
                +0.10 / +1.10%
             |             
            
                9.10
             |           
            
                9.30
             |               
            
                9.00
             |                           
            
                9.20
             | 
            
                9.20
             |                     
            
                5.69
             |                                 
            
                141,160
             |            
            
                 
             |                                       
         
    
        
            | 
                5/24/2013
             | 
            
                +0.10 / +1.11%
             |             
            
                9.10
             |           
            
                9.20
             |               
            
                9.00
             |                           
            
                9.10
             | 
            
                9.10
             |                     
            
                5.63
             |                                 
            
                56,640
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/23/2013
             | 
            
                -0.20 / -2.17%
             |             
            
                9.30
             |           
            
                9.30
             |               
            
                9.00
             |                           
            
                9.00
             | 
            
                9.00
             |                     
            
                5.56
             |                                 
            
                164,100
             |            
            
                 
             |                                       
         
    
        
            | 
                5/22/2013
             | 
            
                +0.20 / +2.22%
             |             
            
                9.10
             |           
            
                9.40
             |               
            
                9.00
             |                           
            
                9.20
             | 
            
                9.20
             |                     
            
                5.69
             |                                 
            
                247,780
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/21/2013
             | 
            
                0.00 / 0.00%
             |             
            
                9.00
             |           
            
                9.10
             |               
            
                8.90
             |                           
            
                9.00
             | 
            
                9.00
             |                     
            
                5.56
             |                                 
            
                157,550
             |            
            
                 
             |                                       
         
    
        
            | 
                5/20/2013
             | 
            
                -0.30 / -3.23%
             |             
            
                9.00
             |           
            
                9.00
             |               
            
                8.80
             |                           
            
                9.00
             | 
            
                9.00
             |                     
            
                5.56
             |                                 
            
                91,680
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/17/2013
             | 
            
                0.00 / 0.00%
             |             
            
                9.30
             |           
            
                9.30
             |               
            
                9.20
             |                           
            
                9.30
             | 
            
                9.30
             |                     
            
                5.44
             |                                 
            
                24,290
             |            
            
                 
             |                                       
         
    
        
            | 
                5/16/2013
             | 
            
                +0.10 / +1.09%
             |             
            
                9.20
             |           
            
                9.30
             |               
            
                9.10
             |                           
            
                9.30
             | 
            
                9.30
             |                     
            
                5.44
             |                                 
            
                54,790
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/15/2013
             | 
            
                +0.10 / +1.10%
             |             
            
                9.10
             |           
            
                9.30
             |               
            
                9.00
             |                           
            
                9.20
             | 
            
                9.20
             |                     
            
                5.38
             |                                 
            
                85,460
             |            
            
                 
             |                                       
         
    
        
            | 
                5/14/2013
             | 
            
                -0.20 / -2.15%
             |             
            
                9.20
             |           
            
                9.30
             |               
            
                9.10
             |                           
            
                9.10
             | 
            
                9.10
             |                     
            
                5.32
             |                                 
            
                46,290
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/13/2013
             | 
            
                +0.10 / +1.09%
             |             
            
                9.20
             |           
            
                9.30
             |               
            
                9.10
             |                           
            
                9.30
             | 
            
                9.30
             |                     
            
                5.44
             |                                 
            
                12,140
             |            
            
                 
             |                                       
         
    
        
            | 
                5/10/2013
             | 
            
                -0.10 / -1.08%
             |             
            
                9.30
             |           
            
                9.40
             |               
            
                9.10
             |                           
            
                9.20
             | 
            
                9.20
             |                     
            
                5.38
             |                                 
            
                91,780
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/9/2013
             | 
            
                0.00 / 0.00%
             |             
            
                9.30
             |           
            
                9.40
             |               
            
                9.20
             |                           
            
                9.30
             | 
            
                9.30
             |                     
            
                5.44
             |                                 
            
                22,000
             |            
            
                 
             |                                       
         
    
        
            | 
                5/8/2013
             | 
            
                0.00 / 0.00%
             |             
            
                9.30
             |           
            
                9.40
             |               
            
                9.30
             |                           
            
                9.30
             | 
            
                9.30
             |                     
            
                5.44
             |                                 
            
                150,570
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/7/2013
             | 
            
                0.00 / 0.00%
             |             
            
                9.30
             |           
            
                9.40
             |               
            
                9.20
             |                           
            
                9.30
             | 
            
                9.30
             |                     
            
                5.44
             |                                 
            
                101,650
             |            
            
                 
             |                                       
         
    
        
            | 
                5/6/2013
             | 
            
                +0.30 / +3.33%
             |             
            
                9.20
             |           
            
                9.30
             |               
            
                9.00
             |                           
            
                9.30
             | 
            
                9.30
             |                     
            
                5.44
             |                                 
            
                141,530
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/3/2013
             | 
            
                +0.10 / +1.12%
             |             
            
                9.00
             |           
            
                9.00
             |               
            
                8.90
             |                           
            
                9.00
             | 
            
                9.00
             |                     
            
                5.26
             |                                 
            
                68,380
             |            
            
                 
             |                                       
         
    
        
            | 
                5/2/2013
             | 
            
                +0.20 / +2.30%
             |             
            
                8.80
             |           
            
                9.00
             |               
            
                8.70
             |                           
            
                8.90
             | 
            
                8.90
             |                     
            
                5.21
             |                                 
            
                96,340
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/26/2013
             | 
            
                0.00 / 0.00%
             |             
            
                8.70
             |           
            
                8.80
             |               
            
                8.60
             |                           
            
                8.70
             | 
            
                8.70
             |                     
            
                5.09
             |                                 
            
                45,120
             |            
            
                 
             |                                       
         
    
        
            | 
                4/25/2013
             | 
            
                0.00 / 0.00%
             |             
            
                8.70
             |           
            
                8.90
             |               
            
                8.70
             |                           
            
                8.70
             | 
            
                8.70
             |                     
            
                5.09
             |                                 
            
                49,170
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/24/2013
             | 
            
                -0.10 / -1.14%
             |             
            
                8.90
             |           
            
                8.90
             |               
            
                8.60
             |                           
            
                8.70
             | 
            
                8.70
             |                     
            
                5.09
             |                                 
            
                51,370
             |            
            
                 
             |                                       
         
    
        
            | 
                4/23/2013
             | 
            
                +0.10 / +1.15%
             |             
            
                8.80
             |           
            
                8.90
             |               
            
                8.60
             |                           
            
                8.80
             | 
            
                8.80
             |                     
            
                5.15
             |                                 
            
                80,330
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/22/2013
             | 
            
                -0.20 / -2.25%
             |             
            
                8.60
             |           
            
                9.00
             |               
            
                8.60
             |                           
            
                8.70
             | 
            
                8.70
             |                     
            
                5.09
             |                                 
            
                70,760
             |            
            
                 
             |                                       
         
    
        
            | 
                4/18/2013
             | 
            
                0.00 / 0.00%
             |             
            
                8.90
             |           
            
                8.90
             |               
            
                8.70
             |                           
            
                8.90
             | 
            
                8.90
             |                     
            
                5.21
             |                                 
            
                112,770
             |  
            
                 
             |                                                              
             
    
         
    
    
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