| 
                 
                    Closing price on 4/1/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    12.80 | 
                 
                
                    | High | 
                    12.90 | 
                 
                
                    | Low | 
                    12.70 | 
                     
                
                    | Volume | 
                    49,240 | 
                                 
                
                    | Split-adjusted Price | 
                    5.34 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PXS Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                4/1/2011
             | 
            
                0.00 / 0.00%
             |             
            
                12.80
             |           
            
                12.90
             |               
            
                12.70
             |                           
            
                12.90
             | 
            
                12.90
             |                     
            
                5.34
             |                                 
            
                49,240
             |            
            
                 
             |                                       
         
    
        
            | 
                3/31/2011
             | 
            
                0.00 / 0.00%
             |             
            
                12.90
             |           
            
                13.00
             |               
            
                12.80
             |                           
            
                12.90
             | 
            
                12.90
             |                     
            
                5.34
             |                                 
            
                65,880
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/30/2011
             | 
            
                0.00 / 0.00%
             |             
            
                12.50
             |           
            
                12.90
             |               
            
                12.50
             |                           
            
                12.90
             | 
            
                12.90
             |                     
            
                5.34
             |                                 
            
                108,960
             |            
            
                 
             |                                       
         
    
        
            | 
                3/29/2011
             | 
            
                +0.30 / +2.38%
             |             
            
                12.70
             |           
            
                12.90
             |               
            
                12.60
             |                           
            
                12.90
             | 
            
                12.90
             |                     
            
                5.34
             |                                 
            
                133,180
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/28/2011
             | 
            
                +0.10 / +0.80%
             |             
            
                13.00
             |           
            
                13.00
             |               
            
                12.50
             |                           
            
                12.60
             | 
            
                12.60
             |                     
            
                5.22
             |                                 
            
                204,490
             |            
            
                 
             |                                       
         
    
        
            | 
                3/25/2011
             | 
            
                0.00 / 0.00%
             |             
            
                12.50
             |           
            
                12.60
             |               
            
                12.50
             |                           
            
                12.50
             | 
            
                12.50
             |                     
            
                5.18
             |                                 
            
                104,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/24/2011
             | 
            
                -0.30 / -2.34%
             |             
            
                12.90
             |           
            
                12.90
             |               
            
                12.40
             |                           
            
                12.50
             | 
            
                12.50
             |                     
            
                5.18
             |                                 
            
                177,160
             |            
            
                 
             |                                       
         
    
        
            | 
                3/23/2011
             | 
            
                -0.10 / -0.78%
             |             
            
                12.90
             |           
            
                12.90
             |               
            
                12.80
             |                           
            
                12.80
             | 
            
                12.80
             |                     
            
                5.30
             |                                 
            
                113,230
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/22/2011
             | 
            
                -0.10 / -0.77%
             |             
            
                13.00
             |           
            
                13.00
             |               
            
                12.80
             |                           
            
                12.90
             | 
            
                12.90
             |                     
            
                5.34
             |                                 
            
                78,860
             |            
            
                 
             |                                       
         
    
        
            | 
                3/21/2011
             | 
            
                -0.10 / -0.76%
             |             
            
                13.40
             |           
            
                13.40
             |               
            
                12.90
             |                           
            
                13.00
             | 
            
                13.00
             |                     
            
                5.39
             |                                 
            
                152,790
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/18/2011
             | 
            
                +0.30 / +2.34%
             |             
            
                12.80
             |           
            
                13.20
             |               
            
                12.70
             |                           
            
                13.10
             | 
            
                13.10
             |                     
            
                5.43
             |                                 
            
                117,730
             |            
            
                 
             |                                       
         
    
        
            | 
                3/17/2011
             | 
            
                +0.30 / +2.40%
             |             
            
                12.80
             |           
            
                12.80
             |               
            
                12.50
             |                           
            
                12.80
             | 
            
                12.80
             |                     
            
                5.30
             |                                 
            
                43,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/16/2011
             | 
            
                +0.20 / +1.63%
             |             
            
                12.70
             |           
            
                12.70
             |               
            
                12.20
             |                           
            
                12.50
             | 
            
                12.50
             |                     
            
                5.18
             |                                 
            
                71,840
             |            
            
                 
             |                                       
         
    
        
            | 
                3/15/2011
             | 
            
                0.00 / 0.00%
             |             
            
                12.30
             |           
            
                12.50
             |               
            
                11.80
             |                           
            
                12.30
             | 
            
                12.30
             |                     
            
                5.10
             |                                 
            
                53,840
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/14/2011
             | 
            
                -0.60 / -4.65%
             |             
            
                13.10
             |           
            
                13.10
             |               
            
                12.30
             |                           
            
                12.30
             | 
            
                12.30
             |                     
            
                5.10
             |                                 
            
                141,900
             |            
            
                 
             |                                       
         
    
        
            | 
                3/11/2011
             | 
            
                +0.50 / +4.03%
             |             
            
                13.00
             |           
            
                13.00
             |               
            
                12.80
             |                           
            
                12.90
             | 
            
                12.90
             |                     
            
                5.34
             |                                 
            
                142,420
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/10/2011
             | 
            
                +0.50 / +4.20%
             |             
            
                11.80
             |           
            
                12.40
             |               
            
                11.80
             |                           
            
                12.40
             | 
            
                12.40
             |                     
            
                5.14
             |                                 
            
                235,930
             |            
            
                 
             |                                       
         
    
        
            | 
                3/9/2011
             | 
            
                0.00 / 0.00%
             |             
            
                11.90
             |           
            
                12.00
             |               
            
                11.50
             |                           
            
                11.90
             | 
            
                11.90
             |                     
            
                4.93
             |                                 
            
                99,920
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/8/2011
             | 
            
                +0.10 / +0.85%
             |             
            
                11.80
             |           
            
                12.00
             |               
            
                11.70
             |                           
            
                11.90
             | 
            
                11.90
             |                     
            
                4.93
             |                                 
            
                122,910
             |            
            
                 
             |                                       
         
    
        
            | 
                3/7/2011
             | 
            
                0.00 / 0.00%
             |             
            
                12.10
             |           
            
                12.10
             |               
            
                11.80
             |                           
            
                11.80
             | 
            
                11.80
             |                     
            
                4.89
             |                                 
            
                28,860
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/4/2011
             | 
            
                0.00 / 0.00%
             |             
            
                11.50
             |           
            
                12.00
             |               
            
                11.50
             |                           
            
                11.80
             | 
            
                11.80
             |                     
            
                4.89
             |                                 
            
                32,770
             |            
            
                 
             |                                       
         
    
        
            | 
                3/3/2011
             | 
            
                -0.10 / -0.84%
             |             
            
                11.90
             |           
            
                11.90
             |               
            
                11.50
             |                           
            
                11.80
             | 
            
                11.80
             |                     
            
                4.89
             |                                 
            
                21,380
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/2/2011
             | 
            
                -0.60 / -4.80%
             |             
            
                12.90
             |           
            
                12.90
             |               
            
                11.90
             |                           
            
                11.90
             | 
            
                11.90
             |                     
            
                4.93
             |                                 
            
                704,640
             |            
            
                 
             |                                       
         
    
        
            | 
                3/1/2011
             | 
            
                +0.10 / +0.81%
             |             
            
                12.30
             |           
            
                12.50
             |               
            
                12.30
             |                           
            
                12.50
             | 
            
                12.50
             |                     
            
                5.18
             |                                 
            
                79,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/28/2011
             | 
            
                -0.40 / -3.13%
             |             
            
                12.70
             |           
            
                12.80
             |               
            
                12.40
             |                           
            
                12.40
             | 
            
                12.40
             |                     
            
                5.14
             |                                 
            
                151,580
             |            
            
                 
             |                                       
         
    
        
            | 
                2/25/2011
             | 
            
                +0.10 / +0.79%
             |             
            
                12.50
             |           
            
                13.00
             |               
            
                12.50
             |                           
            
                12.80
             | 
            
                12.80
             |                     
            
                5.30
             |                                 
            
                144,740
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/24/2011
             | 
            
                -0.20 / -1.55%
             |             
            
                12.90
             |           
            
                12.90
             |               
            
                12.40
             |                           
            
                12.70
             | 
            
                12.70
             |                     
            
                5.26
             |                                 
            
                148,670
             |            
            
                 
             |                                       
         
    
        
            | 
                2/23/2011
             | 
            
                +0.10 / +0.78%
             |             
            
                13.00
             |           
            
                13.30
             |               
            
                12.80
             |                           
            
                12.90
             | 
            
                12.90
             |                     
            
                5.34
             |                                 
            
                123,670
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/22/2011
             | 
            
                +0.40 / +3.23%
             |             
            
                12.40
             |           
            
                13.00
             |               
            
                12.40
             |                           
            
                12.80
             | 
            
                12.80
             |                     
            
                5.30
             |                                 
            
                202,810
             |            
            
                 
             |                                       
         
    
        
            | 
                2/21/2011
             | 
            
                -3.10 / -20.00%
             |             
            
                13.30
             |           
            
                13.30
             |               
            
                12.30
             |                           
            
                12.40
             | 
            
                12.40
             |                     
            
                5.14
             |                                 
            
                360,280
             |  
            
                 
             |                                                              
             
    
         
    
    
 |