| 
                 
                    Closing price on 2/24/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    12.90 | 
                 
                
                    | High | 
                    12.90 | 
                 
                
                    | Low | 
                    12.40 | 
                     
                
                    | Volume | 
                    148,670 | 
                                 
                
                    | Split-adjusted Price | 
                    5.26 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PXS Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                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
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/18/2011
             | 
            
                -0.30 / -1.90%
             |             
            
                15.80
             |           
            
                16.00
             |               
            
                15.50
             |                           
            
                15.50
             | 
            
                15.50
             |                     
            
                5.28
             |                                 
            
                320,590
             |            
            
                 
             |                                       
         
    
        
            | 
                2/17/2011
             | 
            
                -0.70 / -4.24%
             |             
            
                16.20
             |           
            
                16.40
             |               
            
                15.70
             |                           
            
                15.80
             | 
            
                15.80
             |                     
            
                5.38
             |                                 
            
                292,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/16/2011
             | 
            
                -0.10 / -0.60%
             |             
            
                16.50
             |           
            
                16.90
             |               
            
                16.50
             |                           
            
                16.50
             | 
            
                16.50
             |                     
            
                5.62
             |                                 
            
                174,800
             |            
            
                 
             |                                       
         
    
        
            | 
                2/15/2011
             | 
            
                -0.70 / -4.05%
             |             
            
                16.90
             |           
            
                17.20
             |               
            
                16.50
             |                           
            
                16.60
             | 
            
                16.60
             |                     
            
                5.66
             |                                 
            
                263,850
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/14/2011
             | 
            
                -0.90 / -4.95%
             |             
            
                18.00
             |           
            
                18.00
             |               
            
                17.30
             |                           
            
                17.30
             | 
            
                17.30
             |                     
            
                5.90
             |                                 
            
                135,950
             |            
            
                 
             |                                       
         
    
        
            | 
                2/11/2011
             | 
            
                +0.60 / +3.41%
             |             
            
                18.30
             |           
            
                18.40
             |               
            
                17.90
             |                           
            
                18.20
             | 
            
                18.20
             |                     
            
                6.20
             |                                 
            
                211,540
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/10/2011
             | 
            
                +0.80 / +4.76%
             |             
            
                16.80
             |           
            
                17.60
             |               
            
                16.60
             |                           
            
                17.60
             | 
            
                17.60
             |                     
            
                6.00
             |                                 
            
                313,610
             |            
            
                 
             |                                       
         
    
        
            | 
                2/9/2011
             | 
            
                +0.10 / +0.60%
             |             
            
                17.00
             |           
            
                17.20
             |               
            
                16.80
             |                           
            
                16.80
             | 
            
                16.80
             |                     
            
                5.72
             |                                 
            
                214,490
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/8/2011
             | 
            
                +0.10 / +0.60%
             |             
            
                16.60
             |           
            
                16.70
             |               
            
                16.50
             |                           
            
                16.70
             | 
            
                16.70
             |                     
            
                5.69
             |                                 
            
                161,620
             |            
            
                 
             |                                       
         
    
        
            | 
                1/28/2011
             | 
            
                -0.30 / -1.78%
             |             
            
                17.00
             |           
            
                17.00
             |               
            
                16.60
             |                           
            
                16.60
             | 
            
                16.60
             |                     
            
                5.66
             |                                 
            
                109,340
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/27/2011
             | 
            
                +0.30 / +1.81%
             |             
            
                16.90
             |           
            
                16.90
             |               
            
                16.60
             |                           
            
                16.90
             | 
            
                16.90
             |                     
            
                5.76
             |                                 
            
                145,170
             |            
            
                 
             |                                       
         
    
        
            | 
                1/26/2011
             | 
            
                0.00 / 0.00%
             |             
            
                16.40
             |           
            
                16.90
             |               
            
                16.40
             |                           
            
                16.60
             | 
            
                16.60
             |                     
            
                5.66
             |                                 
            
                55,630
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/25/2011
             | 
            
                -0.30 / -1.78%
             |             
            
                17.10
             |           
            
                17.10
             |               
            
                16.60
             |                           
            
                16.60
             | 
            
                16.60
             |                     
            
                5.66
             |                                 
            
                75,290
             |            
            
                 
             |                                       
         
    
        
            | 
                1/24/2011
             | 
            
                0.00 / 0.00%
             |             
            
                17.00
             |           
            
                17.40
             |               
            
                16.70
             |                           
            
                16.90
             | 
            
                16.90
             |                     
            
                5.76
             |                                 
            
                338,130
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/21/2011
             | 
            
                -0.20 / -1.17%
             |             
            
                17.20
             |           
            
                17.20
             |               
            
                16.50
             |                           
            
                16.90
             | 
            
                16.90
             |                     
            
                5.76
             |                                 
            
                319,670
             |            
            
                 
             |                                       
         
    
        
            | 
                1/20/2011
             | 
            
                +0.10 / +0.59%
             |             
            
                17.60
             |           
            
                17.70
             |               
            
                17.00
             |                           
            
                17.10
             | 
            
                17.10
             |                     
            
                5.83
             |                                 
            
                504,750
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/19/2011
             | 
            
                +0.80 / +4.94%
             |             
            
                17.00
             |           
            
                17.00
             |               
            
                17.00
             |                           
            
                17.00
             | 
            
                17.00
             |                     
            
                5.79
             |                                 
            
                273,540
             |            
            
                 
             |                                       
         
    
        
            | 
                1/18/2011
             | 
            
                +0.70 / +4.52%
             |             
            
                16.20
             |           
            
                16.20
             |               
            
                16.20
             |                           
            
                16.20
             | 
            
                16.20
             |                     
            
                5.52
             |                                 
            
                110,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/17/2011
             | 
            
                +0.70 / +4.73%
             |             
            
                15.50
             |           
            
                15.50
             |               
            
                15.50
             |                           
            
                15.50
             | 
            
                15.50
             |                     
            
                5.28
             |                                 
            
                78,710
             |            
            
                 
             |                                       
         
    
        
            | 
                1/14/2011
             | 
            
                +0.10 / +0.68%
             |             
            
                14.70
             |           
            
                14.90
             |               
            
                14.60
             |                           
            
                14.80
             | 
            
                14.80
             |                     
            
                5.04
             |                                 
            
                86,990
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/13/2011
             | 
            
                0.00 / 0.00%
             |             
            
                14.70
             |           
            
                14.80
             |               
            
                14.60
             |                           
            
                14.70
             | 
            
                14.70
             |                     
            
                5.01
             |                                 
            
                138,910
             |            
            
                 
             |                                       
         
    
        
            | 
                1/12/2011
             | 
            
                +0.10 / +0.68%
             |             
            
                14.80
             |           
            
                15.00
             |               
            
                14.60
             |                           
            
                14.70
             | 
            
                14.70
             |                     
            
                5.01
             |                                 
            
                42,250
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/11/2011
             | 
            
                0.00 / 0.00%
             |             
            
                14.30
             |           
            
                14.80
             |               
            
                14.30
             |                           
            
                14.60
             | 
            
                14.60
             |                     
            
                4.98
             |                                 
            
                121,780
             |            
            
                 
             |                                       
         
    
        
            | 
                1/10/2011
             | 
            
                -0.10 / -0.68%
             |             
            
                15.10
             |           
            
                15.10
             |               
            
                14.60
             |                           
            
                14.60
             | 
            
                14.60
             |                     
            
                4.98
             |                                 
            
                136,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/7/2011
             | 
            
                +0.70 / +5.00%
             |             
            
                14.30
             |           
            
                14.70
             |               
            
                14.30
             |                           
            
                14.70
             | 
            
                14.70
             |                     
            
                5.01
             |                                 
            
                311,980
             |            
            
                 
             |                                       
         
    
        
            | 
                1/6/2011
             | 
            
                -0.10 / -0.71%
             |             
            
                14.10
             |           
            
                14.30
             |               
            
                13.90
             |                           
            
                14.00
             | 
            
                14.00
             |                     
            
                4.77
             |                                 
            
                35,800
             |  
            
                 
             |                                                              
             
    
         
    
    
 |