| 
                 
                    Closing price on 4/23/2018
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    6.00 | 
                 
                
                    | High | 
                    6.20 | 
                 
                
                    | Low | 
                    5.80 | 
                     
                
                    | Volume | 
                    125,200 | 
                                 
                
                    | Split-adjusted Price | 
                    5.90 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
VKC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                4/23/2018
             | 
            
                -0.10 / -1.67%
             |             
            
                6.00
             |           
            
                6.20
             |               
            
                5.80
             |                           
            
                5.90
             | 
            
                5.97
             |                     
            
                5.90
             |                                 
            
                125,200
             |            
            
                 
             |                                       
         
    
        
            | 
                4/20/2018
             | 
            
                0.00 / 0.00%
             |             
            
                5.80
             |           
            
                6.00
             |               
            
                5.70
             |                           
            
                6.00
             | 
            
                5.95
             |                     
            
                6.00
             |                                 
            
                50,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/19/2018
             | 
            
                +0.10 / +1.69%
             |             
            
                6.00
             |           
            
                6.00
             |               
            
                5.70
             |                           
            
                6.00
             | 
            
                5.85
             |                     
            
                6.00
             |                                 
            
                29,600
             |            
            
                 
             |                                       
         
    
        
            | 
                4/18/2018
             | 
            
                0.00 / 0.00%
             |             
            
                6.00
             |           
            
                6.10
             |               
            
                5.90
             |                           
            
                5.90
             | 
            
                6.03
             |                     
            
                5.90
             |                                 
            
                165,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/17/2018
             | 
            
                -0.10 / -1.67%
             |             
            
                6.00
             |           
            
                6.00
             |               
            
                5.80
             |                           
            
                5.90
             | 
            
                5.96
             |                     
            
                5.90
             |                                 
            
                97,600
             |            
            
                 
             |                                       
         
    
        
            | 
                4/16/2018
             | 
            
                +0.10 / +1.69%
             |             
            
                5.90
             |           
            
                6.00
             |               
            
                5.80
             |                           
            
                6.00
             | 
            
                5.89
             |                     
            
                6.00
             |                                 
            
                86,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/13/2018
             | 
            
                -0.20 / -3.28%
             |             
            
                6.00
             |           
            
                6.00
             |               
            
                5.90
             |                           
            
                5.90
             | 
            
                5.91
             |                     
            
                5.90
             |                                 
            
                94,900
             |            
            
                 
             |                                       
         
    
        
            | 
                4/12/2018
             | 
            
                +0.20 / +3.39%
             |             
            
                5.90
             |           
            
                6.10
             |               
            
                5.90
             |                           
            
                6.10
             | 
            
                6.05
             |                     
            
                6.10
             |                                 
            
                76,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/11/2018
             | 
            
                -0.30 / -4.84%
             |             
            
                6.20
             |           
            
                6.20
             |               
            
                5.90
             |                           
            
                5.90
             | 
            
                6.03
             |                     
            
                5.90
             |                                 
            
                112,000
             |            
            
                 
             |                                       
         
    
        
            | 
                4/10/2018
             | 
            
                -0.20 / -3.13%
             |             
            
                6.40
             |           
            
                6.40
             |               
            
                6.20
             |                           
            
                6.20
             | 
            
                6.26
             |                     
            
                6.20
             |                                 
            
                86,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/9/2018
             | 
            
                -0.30 / -4.48%
             |             
            
                6.70
             |           
            
                6.70
             |               
            
                6.40
             |                           
            
                6.40
             | 
            
                6.45
             |                     
            
                6.40
             |                                 
            
                119,300
             |            
            
                 
             |                                       
         
    
        
            | 
                4/6/2018
             | 
            
                0.00 / 0.00%
             |             
            
                6.60
             |           
            
                6.80
             |               
            
                6.50
             |                           
            
                6.70
             | 
            
                6.66
             |                     
            
                6.70
             |                                 
            
                246,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/5/2018
             | 
            
                +0.20 / +3.08%
             |             
            
                6.50
             |           
            
                6.70
             |               
            
                6.50
             |                           
            
                6.70
             | 
            
                6.56
             |                     
            
                6.70
             |                                 
            
                69,100
             |            
            
                 
             |                                       
         
    
        
            | 
                4/4/2018
             | 
            
                -0.10 / -1.52%
             |             
            
                6.60
             |           
            
                6.70
             |               
            
                6.50
             |                           
            
                6.50
             | 
            
                6.57
             |                     
            
                6.50
             |                                 
            
                145,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/3/2018
             | 
            
                0.00 / 0.00%
             |             
            
                6.60
             |           
            
                6.90
             |               
            
                6.40
             |                           
            
                6.60
             | 
            
                6.59
             |                     
            
                6.60
             |                                 
            
                220,100
             |            
            
                 
             |                                       
         
    
        
            | 
                4/2/2018
             | 
            
                -0.10 / -1.49%
             |             
            
                6.50
             |           
            
                6.70
             |               
            
                6.40
             |                           
            
                6.60
             | 
            
                6.50
             |                     
            
                6.60
             |                                 
            
                66,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/30/2018
             | 
            
                +0.30 / +4.69%
             |             
            
                6.60
             |           
            
                6.80
             |               
            
                6.40
             |                           
            
                6.70
             | 
            
                6.56
             |                     
            
                6.70
             |                                 
            
                217,900
             |            
            
                 
             |                                       
         
    
        
            | 
                3/29/2018
             | 
            
                0.00 / 0.00%
             |             
            
                6.50
             |           
            
                6.60
             |               
            
                6.30
             |                           
            
                6.40
             | 
            
                6.45
             |                     
            
                6.40
             |                                 
            
                187,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/28/2018
             | 
            
                -0.30 / -4.48%
             |             
            
                6.70
             |           
            
                6.70
             |               
            
                6.30
             |                           
            
                6.40
             | 
            
                6.47
             |                     
            
                6.40
             |                                 
            
                172,000
             |            
            
                 
             |                                       
         
    
        
            | 
                3/27/2018
             | 
            
                +0.20 / +3.08%
             |             
            
                6.60
             |           
            
                6.90
             |               
            
                6.60
             |                           
            
                6.70
             | 
            
                6.76
             |                     
            
                6.70
             |                                 
            
                313,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/26/2018
             | 
            
                +0.50 / +8.33%
             |             
            
                6.00
             |           
            
                6.50
             |               
            
                6.00
             |                           
            
                6.50
             | 
            
                6.30
             |                     
            
                6.50
             |                                 
            
                144,900
             |            
            
                 
             |                                       
         
    
        
            | 
                3/23/2018
             | 
            
                -0.30 / -4.76%
             |             
            
                6.20
             |           
            
                6.30
             |               
            
                6.00
             |                           
            
                6.00
             | 
            
                6.16
             |                     
            
                6.00
             |                                 
            
                131,050
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/22/2018
             | 
            
                -0.20 / -3.08%
             |             
            
                6.60
             |           
            
                6.60
             |               
            
                6.30
             |                           
            
                6.30
             | 
            
                6.35
             |                     
            
                6.30
             |                                 
            
                159,907
             |            
            
                 
             |                                       
         
    
        
            | 
                3/21/2018
             | 
            
                -0.20 / -2.99%
             |             
            
                6.70
             |           
            
                6.70
             |               
            
                6.40
             |                           
            
                6.50
             | 
            
                6.54
             |                     
            
                6.50
             |                                 
            
                178,269
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/20/2018
             | 
            
                +0.20 / +3.08%
             |             
            
                6.60
             |           
            
                7.10
             |               
            
                6.60
             |                           
            
                6.70
             | 
            
                6.73
             |                     
            
                6.70
             |                                 
            
                149,600
             |            
            
                 
             |                                       
         
    
        
            | 
                3/19/2018
             | 
            
                -0.50 / -7.14%
             |             
            
                7.00
             |           
            
                7.00
             |               
            
                6.50
             |                           
            
                6.50
             | 
            
                6.72
             |                     
            
                6.50
             |                                 
            
                167,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/16/2018
             | 
            
                0.00 / 0.00%
             |             
            
                6.90
             |           
            
                7.00
             |               
            
                6.90
             |                           
            
                7.00
             | 
            
                6.91
             |                     
            
                7.00
             |                                 
            
                6,300
             |            
            
                 
             |                                       
         
    
        
            | 
                3/15/2018
             | 
            
                0.00 / 0.00%
             |             
            
                7.00
             |           
            
                7.10
             |               
            
                7.00
             |                           
            
                7.00
             | 
            
                7.00
             |                     
            
                7.00
             |                                 
            
                28,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/14/2018
             | 
            
                0.00 / 0.00%
             |             
            
                7.00
             |           
            
                7.00
             |               
            
                6.90
             |                           
            
                7.00
             | 
            
                6.98
             |                     
            
                7.00
             |                                 
            
                44,938
             |            
            
                 
             |                                       
         
    
        
            | 
                3/13/2018
             | 
            
                -0.20 / -2.78%
             |             
            
                7.00
             |           
            
                7.10
             |               
            
                7.00
             |                           
            
                7.00
             | 
            
                7.00
             |                     
            
                7.00
             |                                 
            
                37,900
             |  
            
                 
             |                                                              
             
    
         
    
    
 |