| 
                 
                    Closing price on 4/25/2012
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    11.70 | 
                 
                
                    | High | 
                    11.90 | 
                 
                
                    | Low | 
                    11.50 | 
                     
                
                    | Volume | 
                    338,890 | 
                                 
                
                    | Split-adjusted Price | 
                    6.11 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PXS Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                4/25/2012
             | 
            
                +0.20 / +1.71%
             |             
            
                11.70
             |           
            
                11.90
             |               
            
                11.50
             |                           
            
                11.90
             | 
            
                11.90
             |                     
            
                6.11
             |                                 
            
                338,890
             |            
            
                 
             |                                       
         
    
        
            | 
                4/24/2012
             | 
            
                +0.40 / +3.54%
             |             
            
                11.40
             |           
            
                11.80
             |               
            
                11.00
             |                           
            
                11.70
             | 
            
                11.70
             |                     
            
                5.85
             |                                 
            
                602,490
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/23/2012
             | 
            
                0.00 / 0.00%
             |             
            
                11.30
             |           
            
                11.40
             |               
            
                11.10
             |                           
            
                11.30
             | 
            
                11.30
             |                     
            
                5.65
             |                                 
            
                229,750
             |            
            
                 
             |                                       
         
    
        
            | 
                4/20/2012
             | 
            
                +0.10 / +0.89%
             |             
            
                11.40
             |           
            
                11.40
             |               
            
                10.90
             |                           
            
                11.30
             | 
            
                11.30
             |                     
            
                5.65
             |                                 
            
                353,440
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/19/2012
             | 
            
                -0.50 / -4.27%
             |             
            
                11.70
             |           
            
                11.80
             |               
            
                11.20
             |                           
            
                11.20
             | 
            
                11.20
             |                     
            
                5.60
             |                                 
            
                656,830
             |            
            
                 
             |                                       
         
    
        
            | 
                4/18/2012
             | 
            
                -0.40 / -3.31%
             |             
            
                12.00
             |           
            
                12.10
             |               
            
                11.70
             |                           
            
                11.70
             | 
            
                11.70
             |                     
            
                5.85
             |                                 
            
                640,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/17/2012
             | 
            
                -0.20 / -1.63%
             |             
            
                12.40
             |           
            
                12.50
             |               
            
                12.10
             |                           
            
                12.10
             | 
            
                12.10
             |                     
            
                6.05
             |                                 
            
                513,780
             |            
            
                 
             |                                       
         
    
        
            | 
                4/16/2012
             | 
            
                +0.20 / +1.65%
             |             
            
                12.30
             |           
            
                12.60
             |               
            
                11.70
             |                           
            
                12.30
             | 
            
                12.30
             |                     
            
                6.15
             |                                 
            
                501,440
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/13/2012
             | 
            
                +0.40 / +3.42%
             |             
            
                11.70
             |           
            
                12.20
             |               
            
                11.40
             |                           
            
                12.10
             | 
            
                12.10
             |                     
            
                6.05
             |                                 
            
                1,004,220
             |            
            
                 
             |                                       
         
    
        
            | 
                4/12/2012
             | 
            
                +0.50 / +4.46%
             |             
            
                11.60
             |           
            
                11.70
             |               
            
                11.50
             |                           
            
                11.70
             | 
            
                11.70
             |                     
            
                5.85
             |                                 
            
                697,060
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/11/2012
             | 
            
                +0.50 / +4.67%
             |             
            
                11.00
             |           
            
                11.20
             |               
            
                10.80
             |                           
            
                11.20
             | 
            
                11.20
             |                     
            
                5.60
             |                                 
            
                710,580
             |            
            
                 
             |                                       
         
    
        
            | 
                4/10/2012
             | 
            
                0.00 / 0.00%
             |             
            
                10.80
             |           
            
                11.00
             |               
            
                10.60
             |                           
            
                10.70
             | 
            
                10.70
             |                     
            
                5.35
             |                                 
            
                511,590
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/9/2012
             | 
            
                +0.50 / +4.90%
             |             
            
                10.30
             |           
            
                10.70
             |               
            
                10.30
             |                           
            
                10.70
             | 
            
                10.70
             |                     
            
                5.35
             |                                 
            
                450,230
             |            
            
                 
             |                                       
         
    
        
            | 
                4/6/2012
             | 
            
                +0.20 / +2.00%
             |             
            
                10.10
             |           
            
                10.40
             |               
            
                10.00
             |                           
            
                10.20
             | 
            
                10.20
             |                     
            
                5.10
             |                                 
            
                267,530
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/5/2012
             | 
            
                +0.10 / +1.01%
             |             
            
                9.90
             |           
            
                10.20
             |               
            
                9.70
             |                           
            
                10.00
             | 
            
                10.00
             |                     
            
                5.00
             |                                 
            
                189,260
             |            
            
                 
             |                                       
         
    
        
            | 
                4/4/2012
             | 
            
                0.00 / 0.00%
             |             
            
                10.10
             |           
            
                10.10
             |               
            
                9.70
             |                           
            
                9.90
             | 
            
                9.90
             |                     
            
                4.95
             |                                 
            
                83,180
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/3/2012
             | 
            
                +0.40 / +4.21%
             |             
            
                9.50
             |           
            
                9.90
             |               
            
                9.50
             |                           
            
                9.90
             | 
            
                9.90
             |                     
            
                4.95
             |                                 
            
                138,620
             |            
            
                 
             |                                       
         
    
        
            | 
                3/30/2012
             | 
            
                -0.30 / -3.06%
             |             
            
                10.00
             |           
            
                10.00
             |               
            
                9.50
             |                           
            
                9.50
             | 
            
                9.50
             |                     
            
                4.75
             |                                 
            
                163,970
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/29/2012
             | 
            
                -0.50 / -4.85%
             |             
            
                10.10
             |           
            
                10.40
             |               
            
                9.80
             |                           
            
                9.80
             | 
            
                9.80
             |                     
            
                4.90
             |                                 
            
                294,120
             |            
            
                 
             |                                       
         
    
        
            | 
                3/28/2012
             | 
            
                -0.30 / -2.83%
             |             
            
                10.20
             |           
            
                10.40
             |               
            
                10.10
             |                           
            
                10.30
             | 
            
                10.30
             |                     
            
                5.15
             |                                 
            
                459,320
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/27/2012
             | 
            
                -0.50 / -4.50%
             |             
            
                10.90
             |           
            
                10.90
             |               
            
                10.60
             |                           
            
                10.60
             | 
            
                10.60
             |                     
            
                5.30
             |                                 
            
                237,260
             |            
            
                 
             |                                       
         
    
        
            | 
                3/26/2012
             | 
            
                +0.30 / +2.78%
             |             
            
                11.10
             |           
            
                11.20
             |               
            
                10.60
             |                           
            
                11.10
             | 
            
                11.10
             |                     
            
                5.55
             |                                 
            
                251,970
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/23/2012
             | 
            
                +0.50 / +4.85%
             |             
            
                10.40
             |           
            
                10.80
             |               
            
                10.30
             |                           
            
                10.80
             | 
            
                10.80
             |                     
            
                5.40
             |                                 
            
                656,870
             |            
            
                 
             |                                       
         
    
        
            | 
                3/22/2012
             | 
            
                +0.30 / +3.00%
             |             
            
                10.00
             |           
            
                10.50
             |               
            
                9.80
             |                           
            
                10.30
             | 
            
                10.30
             |                     
            
                5.15
             |                                 
            
                209,130
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/21/2012
             | 
            
                +0.40 / +4.17%
             |             
            
                9.70
             |           
            
                10.00
             |               
            
                9.60
             |                           
            
                10.00
             | 
            
                10.00
             |                     
            
                5.00
             |                                 
            
                537,640
             |            
            
                 
             |                                       
         
    
        
            | 
                3/20/2012
             | 
            
                +0.30 / +3.23%
             |             
            
                9.30
             |           
            
                9.60
             |               
            
                9.30
             |                           
            
                9.60
             | 
            
                9.60
             |                     
            
                4.80
             |                                 
            
                69,990
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/19/2012
             | 
            
                -0.20 / -2.11%
             |             
            
                9.50
             |           
            
                9.50
             |               
            
                9.30
             |                           
            
                9.30
             | 
            
                9.30
             |                     
            
                4.65
             |                                 
            
                52,740
             |            
            
                 
             |                                       
         
    
        
            | 
                3/16/2012
             | 
            
                +0.20 / +2.15%
             |             
            
                9.60
             |           
            
                9.70
             |               
            
                9.40
             |                           
            
                9.50
             | 
            
                9.50
             |                     
            
                4.75
             |                                 
            
                458,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/15/2012
             | 
            
                +0.40 / +4.49%
             |             
            
                9.00
             |           
            
                9.30
             |               
            
                8.80
             |                           
            
                9.30
             | 
            
                9.30
             |                     
            
                4.65
             |                                 
            
                108,030
             |            
            
                 
             |                                       
         
    
        
            | 
                3/14/2012
             | 
            
                -0.20 / -2.20%
             |             
            
                9.10
             |           
            
                9.10
             |               
            
                8.90
             |                           
            
                8.90
             | 
            
                8.90
             |                     
            
                4.45
             |                                 
            
                71,770
             |  
            
                 
             |                                                              
             
    
         
    
    
 |