| 
                 
                    Closing price on 6/23/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    10.60 | 
                 
                
                    | High | 
                    10.70 | 
                 
                
                    | Low | 
                    10.20 | 
                     
                
                    | Volume | 
                    181,070 | 
                                 
                
                    | Split-adjusted Price | 
                    4.43 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PXS Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                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
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/21/2011
             | 
            
                +0.50 / +5.00%
             |             
            
                10.30
             |           
            
                10.50
             |               
            
                10.00
             |                           
            
                10.50
             | 
            
                10.50
             |                     
            
                4.56
             |                                 
            
                36,500
             |            
            
                 
             |                                       
         
    
        
            | 
                6/20/2011
             | 
            
                -0.30 / -2.91%
             |             
            
                10.00
             |           
            
                10.30
             |               
            
                10.00
             |                           
            
                10.00
             | 
            
                10.00
             |                     
            
                4.35
             |                                 
            
                27,560
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/17/2011
             | 
            
                -0.40 / -3.74%
             |             
            
                10.60
             |           
            
                10.60
             |               
            
                10.30
             |                           
            
                10.30
             | 
            
                10.30
             |                     
            
                4.48
             |                                 
            
                23,300
             |            
            
                 
             |                                       
         
    
        
            | 
                6/16/2011
             | 
            
                0.00 / 0.00%
             |             
            
                10.20
             |           
            
                10.80
             |               
            
                10.20
             |                           
            
                10.70
             | 
            
                10.70
             |                     
            
                4.65
             |                                 
            
                29,960
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/15/2011
             | 
            
                -0.50 / -4.46%
             |             
            
                11.10
             |           
            
                11.20
             |               
            
                10.70
             |                           
            
                10.70
             | 
            
                10.70
             |                     
            
                4.65
             |                                 
            
                56,380
             |            
            
                 
             |                                       
         
    
        
            | 
                6/14/2011
             | 
            
                -0.50 / -4.27%
             |             
            
                11.30
             |           
            
                11.90
             |               
            
                11.20
             |                           
            
                11.20
             | 
            
                11.20
             |                     
            
                4.87
             |                                 
            
                87,970
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/13/2011
             | 
            
                +0.40 / +3.54%
             |             
            
                11.60
             |           
            
                11.80
             |               
            
                11.30
             |                           
            
                11.70
             | 
            
                11.70
             |                     
            
                5.09
             |                                 
            
                60,250
             |            
            
                 
             |                                       
         
    
        
            | 
                6/10/2011
             | 
            
                +0.40 / +3.67%
             |             
            
                11.00
             |           
            
                11.40
             |               
            
                11.00
             |                           
            
                11.30
             | 
            
                11.30
             |                     
            
                4.91
             |                                 
            
                85,950
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/9/2011
             | 
            
                +0.20 / +1.87%
             |             
            
                10.60
             |           
            
                10.90
             |               
            
                10.60
             |                           
            
                10.90
             | 
            
                10.90
             |                     
            
                4.74
             |                                 
            
                13,210
             |            
            
                 
             |                                       
         
    
        
            | 
                6/8/2011
             | 
            
                0.00 / 0.00%
             |             
            
                10.70
             |           
            
                10.70
             |               
            
                10.50
             |                           
            
                10.70
             | 
            
                10.70
             |                     
            
                4.65
             |                                 
            
                33,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/7/2011
             | 
            
                +0.50 / +4.90%
             |             
            
                10.50
             |           
            
                10.70
             |               
            
                10.50
             |                           
            
                10.70
             | 
            
                10.70
             |                     
            
                4.65
             |                                 
            
                48,970
             |            
            
                 
             |                                       
         
    
        
            | 
                6/6/2011
             | 
            
                +0.20 / +2.00%
             |             
            
                10.00
             |           
            
                10.20
             |               
            
                10.00
             |                           
            
                10.20
             | 
            
                10.20
             |                     
            
                4.43
             |                                 
            
                10,860
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/3/2011
             | 
            
                0.00 / 0.00%
             |             
            
                10.50
             |           
            
                10.50
             |               
            
                9.90
             |                           
            
                10.00
             | 
            
                10.00
             |                     
            
                4.35
             |                                 
            
                45,830
             |            
            
                 
             |                                       
         
    
        
            | 
                6/2/2011
             | 
            
                +0.40 / +4.17%
             |             
            
                10.00
             |           
            
                10.00
             |               
            
                9.90
             |                           
            
                10.00
             | 
            
                10.00
             |                     
            
                4.35
             |                                 
            
                33,950
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/1/2011
             | 
            
                +0.40 / +4.35%
             |             
            
                9.30
             |           
            
                9.60
             |               
            
                9.20
             |                           
            
                9.60
             | 
            
                9.60
             |                     
            
                4.17
             |                                 
            
                105,250
             |            
            
                 
             |                                       
         
    
        
            | 
                5/31/2011
             | 
            
                0.00 / 0.00%
             |             
            
                9.30
             |           
            
                9.30
             |               
            
                9.00
             |                           
            
                9.20
             | 
            
                9.20
             |                     
            
                4.00
             |                                 
            
                45,680
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/30/2011
             | 
            
                -0.20 / -2.13%
             |             
            
                9.40
             |           
            
                9.40
             |               
            
                9.00
             |                           
            
                9.20
             | 
            
                9.20
             |                     
            
                4.00
             |                                 
            
                54,630
             |            
            
                 
             |                                       
         
    
        
            | 
                5/27/2011
             | 
            
                0.00 / 0.00%
             |             
            
                9.40
             |           
            
                9.50
             |               
            
                9.20
             |                           
            
                9.40
             | 
            
                9.40
             |                     
            
                4.09
             |                                 
            
                76,050
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/26/2011
             | 
            
                +0.10 / +1.08%
             |             
            
                9.30
             |           
            
                9.60
             |               
            
                8.90
             |                           
            
                9.40
             | 
            
                9.40
             |                     
            
                4.09
             |                                 
            
                95,330
             |            
            
                 
             |                                       
         
    
        
            | 
                5/25/2011
             | 
            
                +0.40 / +4.49%
             |             
            
                8.60
             |           
            
                9.30
             |               
            
                8.50
             |                           
            
                9.30
             | 
            
                9.30
             |                     
            
                4.04
             |                                 
            
                106,560
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/24/2011
             | 
            
                -0.40 / -4.30%
             |             
            
                9.00
             |           
            
                9.10
             |               
            
                8.90
             |                           
            
                8.90
             | 
            
                8.90
             |                     
            
                3.87
             |                                 
            
                69,370
             |            
            
                 
             |                                       
         
    
        
            | 
                5/23/2011
             | 
            
                -0.20 / -2.11%
             |             
            
                9.30
             |           
            
                9.40
             |               
            
                9.20
             |                           
            
                9.30
             | 
            
                9.30
             |                     
            
                4.04
             |                                 
            
                30,870
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/20/2011
             | 
            
                -0.10 / -1.04%
             |             
            
                9.50
             |           
            
                9.50
             |               
            
                9.50
             |                           
            
                9.50
             | 
            
                9.50
             |                     
            
                4.13
             |                                 
            
                19,170
             |            
            
                 
             |                                       
         
    
        
            | 
                5/19/2011
             | 
            
                -0.30 / -3.03%
             |             
            
                9.80
             |           
            
                9.90
             |               
            
                9.60
             |                           
            
                9.60
             | 
            
                9.60
             |                     
            
                4.17
             |                                 
            
                39,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/18/2011
             | 
            
                -0.10 / -1.00%
             |             
            
                9.80
             |           
            
                10.00
             |               
            
                9.60
             |                           
            
                9.90
             | 
            
                9.90
             |                     
            
                4.30
             |                                 
            
                17,230
             |            
            
                 
             |                                       
         
    
        
            | 
                5/17/2011
             | 
            
                -0.10 / -0.99%
             |             
            
                10.40
             |           
            
                10.40
             |               
            
                9.80
             |                           
            
                10.00
             | 
            
                10.00
             |                     
            
                4.35
             |                                 
            
                58,010
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/16/2011
             | 
            
                -0.10 / -0.98%
             |             
            
                10.20
             |           
            
                10.30
             |               
            
                10.10
             |                           
            
                10.10
             | 
            
                10.10
             |                     
            
                4.39
             |                                 
            
                28,530
             |            
            
                 
             |                                       
         
    
        
            | 
                5/13/2011
             | 
            
                -0.30 / -2.86%
             |             
            
                10.40
             |           
            
                10.50
             |               
            
                10.20
             |                           
            
                10.20
             | 
            
                10.20
             |                     
            
                4.43
             |                                 
            
                40,840
             |  
            
                 
             |                                                              
             
    
         
    
    
 |