| 
                 
                    Closing price on 2/24/2012
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    9.10 | 
                 
                
                    | High | 
                    9.30 | 
                 
                
                    | Low | 
                    8.90 | 
                     
                
                    | Volume | 
                    227,950 | 
                                 
                
                    | Split-adjusted Price | 
                    4.45 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PXS Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                2/24/2012
             | 
            
                -0.20 / -2.20%
             |             
            
                9.10
             |           
            
                9.30
             |               
            
                8.90
             |                           
            
                8.90
             | 
            
                8.90
             |                     
            
                4.45
             |                                 
            
                227,950
             |            
            
                 
             |                                       
         
    
        
            | 
                2/23/2012
             | 
            
                +0.20 / +2.25%
             |             
            
                8.90
             |           
            
                9.10
             |               
            
                8.70
             |                           
            
                9.10
             | 
            
                9.10
             |                     
            
                4.55
             |                                 
            
                298,390
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/22/2012
             | 
            
                +0.40 / +4.71%
             |             
            
                8.50
             |           
            
                8.90
             |               
            
                8.50
             |                           
            
                8.90
             | 
            
                8.90
             |                     
            
                4.45
             |                                 
            
                140,950
             |            
            
                 
             |                                       
         
    
        
            | 
                2/21/2012
             | 
            
                -0.20 / -2.30%
             |             
            
                8.90
             |           
            
                9.00
             |               
            
                8.50
             |                           
            
                8.50
             | 
            
                8.50
             |                     
            
                4.25
             |                                 
            
                116,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/20/2012
             | 
            
                +0.40 / +4.82%
             |             
            
                8.50
             |           
            
                8.70
             |               
            
                8.50
             |                           
            
                8.70
             | 
            
                8.70
             |                     
            
                4.35
             |                                 
            
                130,760
             |            
            
                 
             |                                       
         
    
        
            | 
                2/17/2012
             | 
            
                +0.30 / +3.75%
             |             
            
                8.20
             |           
            
                8.30
             |               
            
                8.00
             |                           
            
                8.30
             | 
            
                8.30
             |                     
            
                4.15
             |                                 
            
                38,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/16/2012
             | 
            
                -0.10 / -1.23%
             |             
            
                8.10
             |           
            
                8.20
             |               
            
                8.00
             |                           
            
                8.00
             | 
            
                8.00
             |                     
            
                4.00
             |                                 
            
                70,450
             |            
            
                 
             |                                       
         
    
        
            | 
                2/15/2012
             | 
            
                0.00 / 0.00%
             |             
            
                8.10
             |           
            
                8.10
             |               
            
                7.80
             |                           
            
                8.10
             | 
            
                8.10
             |                     
            
                4.05
             |                                 
            
                94,130
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/14/2012
             | 
            
                +0.30 / +3.85%
             |             
            
                7.80
             |           
            
                8.10
             |               
            
                7.80
             |                           
            
                8.10
             | 
            
                8.10
             |                     
            
                4.05
             |                                 
            
                98,530
             |            
            
                 
             |                                       
         
    
        
            | 
                2/13/2012
             | 
            
                -0.30 / -3.70%
             |             
            
                7.90
             |           
            
                8.00
             |               
            
                7.80
             |                           
            
                7.80
             | 
            
                7.80
             |                     
            
                3.90
             |                                 
            
                108,310
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/10/2012
             | 
            
                -0.30 / -3.57%
             |             
            
                8.60
             |           
            
                8.60
             |               
            
                8.00
             |                           
            
                8.10
             | 
            
                8.10
             |                     
            
                4.05
             |                                 
            
                240,740
             |            
            
                 
             |                                       
         
    
        
            | 
                2/9/2012
             | 
            
                -0.30 / -3.45%
             |             
            
                8.50
             |           
            
                8.70
             |               
            
                8.40
             |                           
            
                8.40
             | 
            
                8.40
             |                     
            
                4.20
             |                                 
            
                148,970
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/8/2012
             | 
            
                +0.30 / +3.57%
             |             
            
                8.50
             |           
            
                8.70
             |               
            
                8.40
             |                           
            
                8.70
             | 
            
                8.70
             |                     
            
                4.35
             |                                 
            
                150,650
             |            
            
                 
             |                                       
         
    
        
            | 
                2/7/2012
             | 
            
                +0.20 / +2.44%
             |             
            
                8.30
             |           
            
                8.40
             |               
            
                8.20
             |                           
            
                8.40
             | 
            
                8.40
             |                     
            
                4.20
             |                                 
            
                65,960
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/6/2012
             | 
            
                -0.10 / -1.20%
             |             
            
                8.30
             |           
            
                8.30
             |               
            
                8.00
             |                           
            
                8.20
             | 
            
                8.20
             |                     
            
                4.10
             |                                 
            
                122,190
             |            
            
                 
             |                                       
         
    
        
            | 
                2/3/2012
             | 
            
                -0.10 / -1.19%
             |             
            
                8.70
             |           
            
                8.80
             |               
            
                8.20
             |                           
            
                8.30
             | 
            
                8.30
             |                     
            
                4.15
             |                                 
            
                223,070
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/2/2012
             | 
            
                +0.40 / +5.00%
             |             
            
                8.20
             |           
            
                8.40
             |               
            
                8.20
             |                           
            
                8.40
             | 
            
                8.40
             |                     
            
                4.20
             |                                 
            
                90,490
             |            
            
                 
             |                                       
         
    
        
            | 
                2/1/2012
             | 
            
                -0.10 / -1.23%
             |             
            
                8.10
             |           
            
                8.20
             |               
            
                7.90
             |                           
            
                8.00
             | 
            
                8.00
             |                     
            
                4.00
             |                                 
            
                87,440
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/31/2012
             | 
            
                -0.10 / -1.22%
             |             
            
                8.30
             |           
            
                8.40
             |               
            
                8.10
             |                           
            
                8.10
             | 
            
                8.10
             |                     
            
                4.05
             |                                 
            
                189,640
             |            
            
                 
             |                                       
         
    
        
            | 
                1/30/2012
             | 
            
                +0.20 / +2.50%
             |             
            
                8.00
             |           
            
                8.30
             |               
            
                7.80
             |                           
            
                8.20
             | 
            
                8.20
             |                     
            
                4.10
             |                                 
            
                70,650
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/20/2012
             | 
            
                +0.10 / +1.27%
             |             
            
                7.90
             |           
            
                8.10
             |               
            
                7.80
             |                           
            
                8.00
             | 
            
                8.00
             |                     
            
                4.00
             |                                 
            
                71,020
             |            
            
                 
             |                                       
         
    
        
            | 
                1/19/2012
             | 
            
                +0.30 / +3.95%
             |             
            
                7.60
             |           
            
                7.90
             |               
            
                7.60
             |                           
            
                7.90
             | 
            
                7.90
             |                     
            
                3.95
             |                                 
            
                86,830
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/18/2012
             | 
            
                +0.10 / +1.33%
             |             
            
                7.50
             |           
            
                7.60
             |               
            
                7.50
             |                           
            
                7.60
             | 
            
                7.60
             |                     
            
                3.80
             |                                 
            
                31,890
             |            
            
                 
             |                                       
         
    
        
            | 
                1/17/2012
             | 
            
                -0.10 / -1.32%
             |             
            
                7.80
             |           
            
                7.80
             |               
            
                7.50
             |                           
            
                7.50
             | 
            
                7.50
             |                     
            
                3.75
             |                                 
            
                86,110
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/16/2012
             | 
            
                +0.30 / +4.11%
             |             
            
                7.40
             |           
            
                7.60
             |               
            
                7.30
             |                           
            
                7.60
             | 
            
                7.60
             |                     
            
                3.80
             |                                 
            
                134,270
             |            
            
                 
             |                                       
         
    
        
            | 
                1/13/2012
             | 
            
                +0.10 / +1.39%
             |             
            
                7.30
             |           
            
                7.40
             |               
            
                7.20
             |                           
            
                7.30
             | 
            
                7.30
             |                     
            
                3.65
             |                                 
            
                57,090
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/12/2012
             | 
            
                -0.30 / -4.00%
             |             
            
                7.50
             |           
            
                7.50
             |               
            
                7.20
             |                           
            
                7.20
             | 
            
                7.20
             |                     
            
                3.60
             |                                 
            
                66,670
             |            
            
                 
             |                                       
         
    
        
            | 
                1/11/2012
             | 
            
                +0.20 / +2.74%
             |             
            
                7.50
             |           
            
                7.60
             |               
            
                7.30
             |                           
            
                7.50
             | 
            
                7.50
             |                     
            
                3.75
             |                                 
            
                207,630
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/10/2012
             | 
            
                +0.20 / +2.82%
             |             
            
                7.10
             |           
            
                7.40
             |               
            
                7.10
             |                           
            
                7.30
             | 
            
                7.30
             |                     
            
                3.65
             |                                 
            
                50,760
             |            
            
                 
             |                                       
         
    
        
            | 
                1/9/2012
             | 
            
                +0.10 / +1.43%
             |             
            
                7.00
             |           
            
                7.20
             |               
            
                6.80
             |                           
            
                7.10
             | 
            
                7.10
             |                     
            
                3.55
             |                                 
            
                66,380
             |  
            
                 
             |                                                              
             
    
         
    
    
 |