| 
                 
                    Closing price on 10/20/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    10.20 | 
                 
                
                    | High | 
                    10.30 | 
                 
                
                    | Low | 
                    10.10 | 
                     
                
                    | Volume | 
                    49,100 | 
                                 
                
                    | Split-adjusted Price | 
                    4.84 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PXS Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                10/20/2011
             | 
            
                0.00 / 0.00%
             |             
            
                10.20
             |           
            
                10.30
             |               
            
                10.10
             |                           
            
                10.20
             | 
            
                10.20
             |                     
            
                4.84
             |                                 
            
                49,100
             |            
            
                 
             |                                       
         
    
        
            | 
                10/19/2011
             | 
            
                +0.20 / +2.00%
             |             
            
                10.00
             |           
            
                10.20
             |               
            
                10.00
             |                           
            
                10.20
             | 
            
                10.20
             |                     
            
                4.84
             |                                 
            
                29,570
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/18/2011
             | 
            
                -0.20 / -1.96%
             |             
            
                10.00
             |           
            
                10.20
             |               
            
                10.00
             |                           
            
                10.00
             | 
            
                10.00
             |                     
            
                4.75
             |                                 
            
                113,250
             |            
            
                 
             |                                       
         
    
        
            | 
                10/17/2011
             | 
            
                -0.20 / -1.92%
             |             
            
                10.50
             |           
            
                10.50
             |               
            
                10.20
             |                           
            
                10.20
             | 
            
                10.20
             |                     
            
                4.84
             |                                 
            
                89,190
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/14/2011
             | 
            
                +0.10 / +0.97%
             |             
            
                10.40
             |           
            
                10.40
             |               
            
                10.30
             |                           
            
                10.40
             | 
            
                10.40
             |                     
            
                4.94
             |                                 
            
                68,930
             |            
            
                 
             |                                       
         
    
        
            | 
                10/13/2011
             | 
            
                +0.10 / +0.98%
             |             
            
                10.20
             |           
            
                10.30
             |               
            
                10.00
             |                           
            
                10.30
             | 
            
                10.30
             |                     
            
                4.89
             |                                 
            
                249,110
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/12/2011
             | 
            
                -0.40 / -3.77%
             |             
            
                10.50
             |           
            
                10.50
             |               
            
                10.10
             |                           
            
                10.20
             | 
            
                10.20
             |                     
            
                4.84
             |                                 
            
                344,680
             |            
            
                 
             |                                       
         
    
        
            | 
                10/11/2011
             | 
            
                +0.10 / +0.95%
             |             
            
                10.80
             |           
            
                10.80
             |               
            
                10.60
             |                           
            
                10.60
             | 
            
                10.60
             |                     
            
                5.03
             |                                 
            
                67,960
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/10/2011
             | 
            
                -0.30 / -2.78%
             |             
            
                10.80
             |           
            
                10.90
             |               
            
                10.40
             |                           
            
                10.50
             | 
            
                10.50
             |                     
            
                4.99
             |                                 
            
                107,480
             |            
            
                 
             |                                       
         
    
        
            | 
                10/7/2011
             | 
            
                -0.40 / -3.57%
             |             
            
                11.30
             |           
            
                11.30
             |               
            
                10.80
             |                           
            
                10.80
             | 
            
                10.80
             |                     
            
                5.13
             |                                 
            
                79,060
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/6/2011
             | 
            
                +0.50 / +4.67%
             |             
            
                10.90
             |           
            
                11.20
             |               
            
                10.70
             |                           
            
                11.20
             | 
            
                11.20
             |                     
            
                5.32
             |                                 
            
                173,340
             |            
            
                 
             |                                       
         
    
        
            | 
                10/5/2011
             | 
            
                +0.30 / +2.88%
             |             
            
                10.80
             |           
            
                10.80
             |               
            
                10.50
             |                           
            
                10.70
             | 
            
                10.70
             |                     
            
                5.08
             |                                 
            
                100,540
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/4/2011
             | 
            
                -0.50 / -4.59%
             |             
            
                10.50
             |           
            
                10.70
             |               
            
                10.40
             |                           
            
                10.40
             | 
            
                10.40
             |                     
            
                4.94
             |                                 
            
                365,310
             |            
            
                 
             |                                       
         
    
        
            | 
                10/3/2011
             | 
            
                -0.50 / -4.39%
             |             
            
                11.10
             |           
            
                11.40
             |               
            
                10.90
             |                           
            
                10.90
             | 
            
                10.90
             |                     
            
                5.18
             |                                 
            
                201,210
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/30/2011
             | 
            
                -0.50 / -4.20%
             |             
            
                11.80
             |           
            
                11.90
             |               
            
                11.40
             |                           
            
                11.40
             | 
            
                11.40
             |                     
            
                5.41
             |                                 
            
                135,560
             |            
            
                 
             |                                       
         
    
        
            | 
                9/29/2011
             | 
            
                -0.30 / -2.46%
             |             
            
                12.80
             |           
            
                12.80
             |               
            
                11.90
             |                           
            
                11.90
             | 
            
                11.90
             |                     
            
                5.65
             |                                 
            
                732,120
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/28/2011
             | 
            
                +0.50 / +4.27%
             |             
            
                12.20
             |           
            
                12.20
             |               
            
                11.90
             |                           
            
                12.20
             | 
            
                12.20
             |                     
            
                5.79
             |                                 
            
                795,020
             |            
            
                 
             |                                       
         
    
        
            | 
                9/27/2011
             | 
            
                +0.50 / +4.46%
             |             
            
                11.70
             |           
            
                11.70
             |               
            
                11.70
             |                           
            
                11.70
             | 
            
                11.70
             |                     
            
                5.56
             |                                 
            
                648,990
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/26/2011
             | 
            
                +0.50 / +4.67%
             |             
            
                11.20
             |           
            
                11.20
             |               
            
                11.20
             |                           
            
                11.20
             | 
            
                11.20
             |                     
            
                5.32
             |                                 
            
                188,950
             |            
            
                 
             |                                       
         
    
        
            | 
                9/23/2011
             | 
            
                -0.30 / -2.73%
             |             
            
                10.70
             |           
            
                10.90
             |               
            
                10.70
             |                           
            
                10.70
             | 
            
                10.70
             |                     
            
                5.08
             |                                 
            
                60,530
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/22/2011
             | 
            
                +0.30 / +2.80%
             |             
            
                10.60
             |           
            
                11.00
             |               
            
                10.60
             |                           
            
                11.00
             | 
            
                11.00
             |                     
            
                5.22
             |                                 
            
                78,530
             |            
            
                 
             |                                       
         
    
        
            | 
                9/21/2011
             | 
            
                -1.10 / -9.32%
             |             
            
                10.60
             |           
            
                11.20
             |               
            
                10.60
             |                           
            
                10.70
             | 
            
                10.70
             |                     
            
                5.08
             |                                 
            
                85,380
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/20/2011
             | 
            
                -0.10 / -0.84%
             |             
            
                11.90
             |           
            
                12.00
             |               
            
                11.70
             |                           
            
                11.80
             | 
            
                11.80
             |                     
            
                5.13
             |                                 
            
                114,160
             |            
            
                 
             |                                       
         
    
        
            | 
                9/19/2011
             | 
            
                +0.20 / +1.71%
             |             
            
                11.30
             |           
            
                11.90
             |               
            
                11.30
             |                           
            
                11.90
             | 
            
                11.90
             |                     
            
                5.17
             |                                 
            
                78,750
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/16/2011
             | 
            
                -0.20 / -1.68%
             |             
            
                11.80
             |           
            
                11.90
             |               
            
                11.60
             |                           
            
                11.70
             | 
            
                11.70
             |                     
            
                5.09
             |                                 
            
                87,450
             |            
            
                 
             |                                       
         
    
        
            | 
                9/15/2011
             | 
            
                -0.20 / -1.65%
             |             
            
                12.10
             |           
            
                12.10
             |               
            
                11.50
             |                           
            
                11.90
             | 
            
                11.90
             |                     
            
                5.17
             |                                 
            
                193,290
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/14/2011
             | 
            
                -0.10 / -0.82%
             |             
            
                12.70
             |           
            
                12.70
             |               
            
                12.10
             |                           
            
                12.10
             | 
            
                12.10
             |                     
            
                5.26
             |                                 
            
                218,790
             |            
            
                 
             |                                       
         
    
        
            | 
                9/13/2011
             | 
            
                +0.40 / +3.39%
             |             
            
                12.00
             |           
            
                12.20
             |               
            
                11.70
             |                           
            
                12.20
             | 
            
                12.20
             |                     
            
                5.30
             |                                 
            
                188,820
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/12/2011
             | 
            
                +0.10 / +0.85%
             |             
            
                11.70
             |           
            
                12.20
             |               
            
                11.50
             |                           
            
                11.80
             | 
            
                11.80
             |                     
            
                5.13
             |                                 
            
                246,950
             |            
            
                 
             |                                       
         
    
        
            | 
                9/9/2011
             | 
            
                +0.50 / +4.46%
             |             
            
                11.50
             |           
            
                11.70
             |               
            
                11.30
             |                           
            
                11.70
             | 
            
                11.70
             |                     
            
                5.09
             |                                 
            
                239,180
             |  
            
                 
             |                                                              
             
    
         
    
    
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