| 
                 
                    Closing price on 8/2/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    9.60 | 
                 
                
                    | High | 
                    9.80 | 
                 
                
                    | Low | 
                    9.60 | 
                     
                
                    | Volume | 
                    169,290 | 
                                 
                
                    | Split-adjusted Price | 
                    4.17 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PXS Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                8/2/2011
             | 
            
                -0.10 / -1.03%
             |             
            
                9.60
             |           
            
                9.80
             |               
            
                9.60
             |                           
            
                9.60
             | 
            
                9.60
             |                     
            
                4.17
             |                                 
            
                169,290
             |            
            
                 
             |                                       
         
    
        
            | 
                8/1/2011
             | 
            
                -0.20 / -2.02%
             |             
            
                10.00
             |           
            
                10.00
             |               
            
                9.70
             |                           
            
                9.70
             | 
            
                9.70
             |                     
            
                4.22
             |                                 
            
                35,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/29/2011
             | 
            
                0.00 / 0.00%
             |             
            
                9.90
             |           
            
                9.90
             |               
            
                9.80
             |                           
            
                9.90
             | 
            
                9.90
             |                     
            
                4.30
             |                                 
            
                18,960
             |            
            
                 
             |                                       
         
    
        
            | 
                7/28/2011
             | 
            
                0.00 / 0.00%
             |             
            
                10.00
             |           
            
                10.10
             |               
            
                9.90
             |                           
            
                9.90
             | 
            
                9.90
             |                     
            
                4.30
             |                                 
            
                27,440
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/27/2011
             | 
            
                +0.10 / +1.02%
             |             
            
                9.90
             |           
            
                9.90
             |               
            
                9.50
             |                           
            
                9.90
             | 
            
                9.90
             |                     
            
                4.30
             |                                 
            
                26,510
             |            
            
                 
             |                                       
         
    
        
            | 
                7/26/2011
             | 
            
                -0.10 / -1.01%
             |             
            
                9.90
             |           
            
                9.90
             |               
            
                9.80
             |                           
            
                9.80
             | 
            
                9.80
             |                     
            
                4.26
             |                                 
            
                20,510
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/25/2011
             | 
            
                -0.20 / -1.98%
             |             
            
                10.10
             |           
            
                10.10
             |               
            
                9.90
             |                           
            
                9.90
             | 
            
                9.90
             |                     
            
                4.30
             |                                 
            
                19,430
             |            
            
                 
             |                                       
         
    
        
            | 
                7/22/2011
             | 
            
                0.00 / 0.00%
             |             
            
                10.10
             |           
            
                10.10
             |               
            
                10.00
             |                           
            
                10.10
             | 
            
                10.10
             |                     
            
                4.39
             |                                 
            
                31,360
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/21/2011
             | 
            
                0.00 / 0.00%
             |             
            
                10.20
             |           
            
                10.20
             |               
            
                10.10
             |                           
            
                10.10
             | 
            
                10.10
             |                     
            
                4.39
             |                                 
            
                29,290
             |            
            
                 
             |                                       
         
    
        
            | 
                7/20/2011
             | 
            
                +0.10 / +1.00%
             |             
            
                10.00
             |           
            
                10.10
             |               
            
                10.00
             |                           
            
                10.10
             | 
            
                10.10
             |                     
            
                4.39
             |                                 
            
                24,350
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/19/2011
             | 
            
                0.00 / 0.00%
             |             
            
                10.00
             |           
            
                10.00
             |               
            
                9.90
             |                           
            
                10.00
             | 
            
                10.00
             |                     
            
                4.35
             |                                 
            
                31,710
             |            
            
                 
             |                                       
         
    
        
            | 
                7/18/2011
             | 
            
                -0.10 / -0.99%
             |             
            
                10.20
             |           
            
                10.20
             |               
            
                9.90
             |                           
            
                10.00
             | 
            
                10.00
             |                     
            
                4.35
             |                                 
            
                25,480
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/15/2011
             | 
            
                0.00 / 0.00%
             |             
            
                10.10
             |           
            
                10.10
             |               
            
                10.00
             |                           
            
                10.10
             | 
            
                10.10
             |                     
            
                4.39
             |                                 
            
                11,840
             |            
            
                 
             |                                       
         
    
        
            | 
                7/14/2011
             | 
            
                -0.10 / -0.98%
             |             
            
                10.10
             |           
            
                10.20
             |               
            
                10.00
             |                           
            
                10.10
             | 
            
                10.10
             |                     
            
                4.39
             |                                 
            
                927,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/13/2011
             | 
            
                +0.20 / +2.00%
             |             
            
                10.00
             |           
            
                10.30
             |               
            
                10.00
             |                           
            
                10.20
             | 
            
                10.20
             |                     
            
                4.43
             |                                 
            
                30,670
             |            
            
                 
             |                                       
         
    
        
            | 
                7/12/2011
             | 
            
                0.00 / 0.00%
             |             
            
                10.10
             |           
            
                10.10
             |               
            
                9.90
             |                           
            
                10.00
             | 
            
                10.00
             |                     
            
                4.35
             |                                 
            
                37,620
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/11/2011
             | 
            
                -0.30 / -2.91%
             |             
            
                10.20
             |           
            
                10.20
             |               
            
                10.00
             |                           
            
                10.00
             | 
            
                10.00
             |                     
            
                4.35
             |                                 
            
                20,010
             |            
            
                 
             |                                       
         
    
        
            | 
                7/8/2011
             | 
            
                0.00 / 0.00%
             |             
            
                10.30
             |           
            
                10.30
             |               
            
                10.10
             |                           
            
                10.30
             | 
            
                10.30
             |                     
            
                4.48
             |                                 
            
                7,570
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/7/2011
             | 
            
                +0.10 / +0.98%
             |             
            
                10.10
             |           
            
                10.30
             |               
            
                10.10
             |                           
            
                10.30
             | 
            
                10.30
             |                     
            
                4.48
             |                                 
            
                16,150
             |            
            
                 
             |                                       
         
    
        
            | 
                7/6/2011
             | 
            
                -0.20 / -1.92%
             |             
            
                10.30
             |           
            
                10.30
             |               
            
                10.10
             |                           
            
                10.20
             | 
            
                10.20
             |                     
            
                4.43
             |                                 
            
                49,480
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/5/2011
             | 
            
                +0.20 / +1.96%
             |             
            
                10.10
             |           
            
                10.50
             |               
            
                10.10
             |                           
            
                10.40
             | 
            
                10.40
             |                     
            
                4.52
             |                                 
            
                41,320
             |            
            
                 
             |                                       
         
    
        
            | 
                7/4/2011
             | 
            
                +0.10 / +0.99%
             |             
            
                10.20
             |           
            
                10.20
             |               
            
                9.90
             |                           
            
                10.20
             | 
            
                10.20
             |                     
            
                4.43
             |                                 
            
                63,460
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/1/2011
             | 
            
                -0.10 / -0.98%
             |             
            
                10.10
             |           
            
                10.20
             |               
            
                10.00
             |                           
            
                10.10
             | 
            
                10.10
             |                     
            
                4.39
             |                                 
            
                39,860
             |            
            
                 
             |                                       
         
    
        
            | 
                6/30/2011
             | 
            
                -0.20 / -1.92%
             |             
            
                10.40
             |           
            
                10.60
             |               
            
                10.20
             |                           
            
                10.20
             | 
            
                10.20
             |                     
            
                4.43
             |                                 
            
                88,760
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/29/2011
             | 
            
                +0.20 / +1.96%
             |             
            
                10.20
             |           
            
                10.40
             |               
            
                10.20
             |                           
            
                10.40
             | 
            
                10.40
             |                     
            
                4.52
             |                                 
            
                39,660
             |            
            
                 
             |                                       
         
    
        
            | 
                6/28/2011
             | 
            
                0.00 / 0.00%
             |             
            
                10.30
             |           
            
                10.50
             |               
            
                10.20
             |                           
            
                10.20
             | 
            
                10.20
             |                     
            
                4.43
             |                                 
            
                94,180
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/27/2011
             | 
            
                -0.10 / -0.97%
             |             
            
                10.20
             |           
            
                10.50
             |               
            
                10.20
             |                           
            
                10.20
             | 
            
                10.20
             |                     
            
                4.43
             |                                 
            
                53,560
             |            
            
                 
             |                                       
         
    
        
            | 
                6/24/2011
             | 
            
                +0.10 / +0.98%
             |             
            
                10.50
             |           
            
                10.50
             |               
            
                10.20
             |                           
            
                10.30
             | 
            
                10.30
             |                     
            
                4.48
             |                                 
            
                54,720
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/23/2011
             | 
            
                -0.50 / -4.67%
             |             
            
                10.60
             |           
            
                10.70
             |               
            
                10.20
             |                           
            
                10.20
             | 
            
                10.20
             |                     
            
                4.43
             |                                 
            
                181,070
             |            
            
                 
             |                                       
         
    
        
            | 
                6/22/2011
             | 
            
                +0.20 / +1.90%
             |             
            
                10.90
             |           
            
                10.90
             |               
            
                10.60
             |                           
            
                10.70
             | 
            
                10.70
             |                     
            
                4.65
             |                                 
            
                40,230
             |  
            
                 
             |                                                              
             
    
         
    
    
 |