| 
                 
                    Closing price on 2/21/2013
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    10.70 | 
                 
                
                    | High | 
                    10.70 | 
                 
                
                    | Low | 
                    9.90 | 
                     
                
                    | Volume | 
                    448,170 | 
                                 
                
                    | Split-adjusted Price | 
                    5.79 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PXS Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                2/21/2013
             | 
            
                -0.70 / -6.60%
             |             
            
                10.70
             |           
            
                10.70
             |               
            
                9.90
             |                           
            
                9.90
             | 
            
                9.90
             |                     
            
                5.79
             |                                 
            
                448,170
             |            
            
                 
             |                                       
         
    
        
            | 
                2/20/2013
             | 
            
                +0.10 / +0.95%
             |             
            
                10.50
             |           
            
                10.70
             |               
            
                10.20
             |                           
            
                10.60
             | 
            
                10.60
             |                     
            
                6.20
             |                                 
            
                455,220
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/19/2013
             | 
            
                +0.60 / +6.06%
             |             
            
                10.50
             |           
            
                10.50
             |               
            
                10.00
             |                           
            
                10.50
             | 
            
                10.50
             |                     
            
                6.14
             |                                 
            
                1,988,990
             |            
            
                 
             |                                       
         
    
        
            | 
                2/18/2013
             | 
            
                +0.60 / +6.45%
             |             
            
                9.90
             |           
            
                9.90
             |               
            
                9.90
             |                           
            
                9.90
             | 
            
                9.90
             |                     
            
                5.79
             |                                 
            
                164,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/8/2013
             | 
            
                +0.60 / +6.90%
             |             
            
                9.30
             |           
            
                9.30
             |               
            
                9.30
             |                           
            
                9.30
             | 
            
                9.30
             |                     
            
                5.44
             |                                 
            
                682,750
             |            
            
                 
             |                                       
         
    
        
            | 
                2/7/2013
             | 
            
                +0.50 / +6.10%
             |             
            
                8.70
             |           
            
                8.70
             |               
            
                8.70
             |                           
            
                8.70
             | 
            
                8.70
             |                     
            
                5.09
             |                                 
            
                371,660
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/6/2013
             | 
            
                +0.50 / +6.49%
             |             
            
                7.70
             |           
            
                8.20
             |               
            
                7.70
             |                           
            
                8.20
             | 
            
                8.20
             |                     
            
                4.80
             |                                 
            
                363,490
             |            
            
                 
             |                                       
         
    
        
            | 
                2/5/2013
             | 
            
                0.00 / 0.00%
             |             
            
                7.60
             |           
            
                7.70
             |               
            
                7.50
             |                           
            
                7.70
             | 
            
                7.70
             |                     
            
                4.50
             |                                 
            
                39,170
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/4/2013
             | 
            
                0.00 / 0.00%
             |             
            
                7.80
             |           
            
                7.80
             |               
            
                7.70
             |                           
            
                7.70
             | 
            
                7.70
             |                     
            
                4.50
             |                                 
            
                250,190
             |            
            
                 
             |                                       
         
    
        
            | 
                2/1/2013
             | 
            
                -0.10 / -1.28%
             |             
            
                7.80
             |           
            
                7.80
             |               
            
                7.60
             |                           
            
                7.70
             | 
            
                7.70
             |                     
            
                4.50
             |                                 
            
                38,520
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/31/2013
             | 
            
                +0.10 / +1.30%
             |             
            
                7.70
             |           
            
                7.90
             |               
            
                7.70
             |                           
            
                7.80
             | 
            
                7.80
             |                     
            
                4.56
             |                                 
            
                220,410
             |            
            
                 
             |                                       
         
    
        
            | 
                1/30/2013
             | 
            
                +0.10 / +1.32%
             |             
            
                7.70
             |           
            
                7.80
             |               
            
                7.50
             |                           
            
                7.70
             | 
            
                7.70
             |                     
            
                4.50
             |                                 
            
                261,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/29/2013
             | 
            
                -0.10 / -1.30%
             |             
            
                7.60
             |           
            
                7.70
             |               
            
                7.50
             |                           
            
                7.60
             | 
            
                7.60
             |                     
            
                4.45
             |                                 
            
                186,800
             |            
            
                 
             |                                       
         
    
        
            | 
                1/28/2013
             | 
            
                0.00 / 0.00%
             |             
            
                7.80
             |           
            
                7.90
             |               
            
                7.60
             |                           
            
                7.70
             | 
            
                7.70
             |                     
            
                4.50
             |                                 
            
                435,960
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/25/2013
             | 
            
                0.00 / 0.00%
             |             
            
                7.80
             |           
            
                7.90
             |               
            
                7.70
             |                           
            
                7.70
             | 
            
                7.70
             |                     
            
                4.50
             |                                 
            
                304,950
             |            
            
                 
             |                                       
         
    
        
            | 
                1/24/2013
             | 
            
                +0.10 / +1.32%
             |             
            
                7.70
             |           
            
                7.80
             |               
            
                7.40
             |                           
            
                7.70
             | 
            
                7.70
             |                     
            
                4.50
             |                                 
            
                201,720
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/23/2013
             | 
            
                +0.10 / +1.33%
             |             
            
                7.70
             |           
            
                7.70
             |               
            
                7.40
             |                           
            
                7.60
             | 
            
                7.60
             |                     
            
                4.45
             |                                 
            
                72,580
             |            
            
                 
             |                                       
         
    
        
            | 
                1/22/2013
             | 
            
                -0.40 / -5.06%
             |             
            
                7.90
             |           
            
                7.90
             |               
            
                7.50
             |                           
            
                7.50
             | 
            
                7.50
             |                     
            
                4.39
             |                                 
            
                380,110
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/21/2013
             | 
            
                -0.10 / -1.25%
             |             
            
                8.10
             |           
            
                8.10
             |               
            
                7.90
             |                           
            
                7.90
             | 
            
                7.90
             |                     
            
                4.62
             |                                 
            
                79,690
             |            
            
                 
             |                                       
         
    
        
            | 
                1/18/2013
             | 
            
                -0.20 / -2.44%
             |             
            
                8.00
             |           
            
                8.20
             |               
            
                7.90
             |                           
            
                8.00
             | 
            
                8.00
             |                     
            
                4.68
             |                                 
            
                118,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/17/2013
             | 
            
                0.00 / 0.00%
             |             
            
                8.20
             |           
            
                8.30
             |               
            
                8.00
             |                           
            
                8.20
             | 
            
                8.20
             |                     
            
                4.80
             |                                 
            
                179,310
             |            
            
                 
             |                                       
         
    
        
            | 
                1/16/2013
             | 
            
                0.00 / 0.00%
             |             
            
                8.40
             |           
            
                8.50
             |               
            
                8.20
             |                           
            
                8.20
             | 
            
                8.20
             |                     
            
                4.80
             |                                 
            
                377,620
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/15/2013
             | 
            
                +0.30 / +3.80%
             |             
            
                7.90
             |           
            
                8.40
             |               
            
                7.80
             |                           
            
                8.20
             | 
            
                8.20
             |                     
            
                4.80
             |                                 
            
                291,880
             |            
            
                 
             |                                       
         
    
        
            | 
                1/14/2013
             | 
            
                0.00 / 0.00%
             |             
            
                7.80
             |           
            
                8.00
             |               
            
                7.70
             |                           
            
                7.90
             | 
            
                7.90
             |                     
            
                4.62
             |                                 
            
                138,110
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/11/2013
             | 
            
                -0.10 / -1.25%
             |             
            
                8.20
             |           
            
                8.20
             |               
            
                7.90
             |                           
            
                7.90
             | 
            
                7.90
             |                     
            
                4.62
             |                                 
            
                133,930
             |            
            
                 
             |                                       
         
    
        
            | 
                1/10/2013
             | 
            
                +0.10 / +1.27%
             |             
            
                7.80
             |           
            
                8.10
             |               
            
                7.80
             |                           
            
                8.00
             | 
            
                8.00
             |                     
            
                4.68
             |                                 
            
                118,390
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/9/2013
             | 
            
                -0.30 / -3.66%
             |             
            
                8.20
             |           
            
                8.40
             |               
            
                7.80
             |                           
            
                7.90
             | 
            
                7.90
             |                     
            
                4.62
             |                                 
            
                619,700
             |            
            
                 
             |                                       
         
    
        
            | 
                1/8/2013
             | 
            
                -0.20 / -2.38%
             |             
            
                8.40
             |           
            
                8.50
             |               
            
                8.10
             |                           
            
                8.20
             | 
            
                8.20
             |                     
            
                4.80
             |                                 
            
                105,470
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/7/2013
             | 
            
                +0.40 / +5.00%
             |             
            
                8.20
             |           
            
                8.40
             |               
            
                8.20
             |                           
            
                8.40
             | 
            
                8.40
             |                     
            
                4.91
             |                                 
            
                444,380
             |            
            
                 
             |                                       
         
    
        
            | 
                1/4/2013
             | 
            
                +0.20 / +2.56%
             |             
            
                7.80
             |           
            
                8.10
             |               
            
                7.80
             |                           
            
                8.00
             | 
            
                8.00
             |                     
            
                4.68
             |                                 
            
                92,040
             |  
            
                 
             |                                                              
             
    
         
    
    
 |