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                    Closing price on 1/4/2021
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                    | Open | 31.00 |  
                    | High | 31.60 |  
                    | Low | 31.00 |  
                    | Volume | 15,400 |  
                    | Split-adjusted Price | 12.09 |  
                
             | 
 |  VTK Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 1/4/2021 | +1.10 / +3.62% | 31.00 | 31.60 | 31.00 | 31.50 | 31.13 | 12.09 | 15,400 |   |  
            | 12/31/2020 | +0.50 / +1.61% | 30.00 | 31.60 | 30.00 | 31.60 | 30.37 | 12.12 | 13,500 |   |  			
            | 12/30/2020 | 0.00 / 0.00% | 31.10 | 31.20 | 31.00 | 31.10 | 31.09 | 11.93 | 9,100 |   |  
            | 12/29/2020 | +0.10 / +0.32% | 31.20 | 31.20 | 31.10 | 31.10 | 31.13 | 11.93 | 9,700 |   |  			
            | 12/28/2020 | +0.80 / +2.63% | 30.70 | 31.40 | 30.70 | 31.20 | 30.98 | 11.97 | 15,000 |   |  
            | 12/25/2020 | +0.10 / +0.33% | 30.60 | 30.70 | 30.00 | 30.70 | 30.42 | 11.78 | 16,600 |   |  			
            | 12/24/2020 | -0.10 / -0.33% | 30.70 | 30.70 | 30.50 | 30.60 | 30.61 | 11.74 | 19,300 |   |  
            | 12/23/2020 | 0.00 / 0.00% | 30.70 | 30.80 | 30.70 | 30.70 | 30.71 | 11.78 | 11,500 |   |  			
            | 12/22/2020 | +0.50 / +1.65% | 30.30 | 30.80 | 30.30 | 30.80 | 30.67 | 11.82 | 18,700 |   |  
            | 12/21/2020 | 0.00 / 0.00% | 30.50 | 30.50 | 30.20 | 30.30 | 30.31 | 11.63 | 18,300 |   |  			
            | 12/18/2020 | -0.10 / -0.33% | 30.30 | 30.40 | 30.30 | 30.30 | 30.31 | 11.63 | 7,700 |   |  
            | 12/17/2020 | 0.00 / 0.00% | 30.40 | 30.50 | 30.30 | 30.40 | 30.36 | 11.66 | 15,800 |   |  			
            | 12/16/2020 | 0.00 / 0.00% | 30.40 | 30.50 | 30.30 | 30.30 | 30.40 | 11.63 | 7,400 |   |  
            | 12/15/2020 | -0.10 / -0.33% | 30.50 | 30.50 | 30.10 | 30.40 | 30.30 | 11.66 | 10,800 |   |  			
            | 12/14/2020 | +0.80 / +2.69% | 30.50 | 31.00 | 30.30 | 30.50 | 30.50 | 11.70 | 7,100 |   |  
            | 12/11/2020 | 0.00 / 0.00% | 29.00 | 30.00 | 29.00 | 30.00 | 29.66 | 11.51 | 28,600 |   |  			
            | 12/10/2020 | -0.50 / -1.64% | 28.80 | 30.20 | 28.80 | 30.00 | 30.03 | 11.51 | 15,500 |   |  
            | 12/9/2020 | -0.40 / -1.29% | 30.80 | 30.80 | 30.30 | 30.50 | 30.48 | 11.70 | 37,000 |   |  			
            | 12/8/2020 | -0.40 / -1.28% | 29.80 | 31.50 | 29.80 | 30.80 | 30.90 | 11.82 | 7,300 |   |  
            | 12/7/2020 | -0.10 / -0.32% | 26.50 | 31.60 | 26.50 | 31.00 | 31.21 | 11.89 | 15,000 |   |  			
            | 12/4/2020 | -0.70 / -2.21% | 30.20 | 31.50 | 30.20 | 31.00 | 31.13 | 11.89 | 14,800 |   |  
            | 12/3/2020 | -0.50 / -1.56% | 32.00 | 33.00 | 31.00 | 31.50 | 31.67 | 12.09 | 19,800 |   |  			
            | 12/2/2020 | +1.50 / +4.87% | 31.70 | 32.60 | 31.70 | 32.30 | 32.04 | 12.39 | 18,700 |   |  
            | 12/1/2020 | -0.30 / -0.94% | 30.50 | 31.70 | 30.00 | 31.50 | 30.82 | 12.09 | 17,000 |   |  			
            | 11/30/2020 | +0.40 / +1.27% | 31.40 | 32.00 | 31.40 | 31.80 | 31.83 | 12.20 | 26,200 |   |  
            | 11/27/2020 | +0.10 / +0.32% | 31.20 | 32.00 | 31.20 | 31.70 | 31.37 | 12.16 | 12,800 |   |  			
            | 11/26/2020 | -1.30 / -3.90% | 31.00 | 32.10 | 31.00 | 32.00 | 31.58 | 12.28 | 13,400 |   |  
            | 11/25/2020 | -3.90 / -10.92% | 35.60 | 35.60 | 31.00 | 31.80 | 33.25 | 12.20 | 30,900 |   |  			
            | 11/24/2020 | +4.00 / +12.66% | 35.00 | 36.30 | 33.50 | 35.60 | 35.66 | 13.66 | 68,500 |   |  
            | 11/23/2020 | +4.20 / +14.74% | 29.00 | 32.70 | 29.00 | 32.70 | 31.63 | 12.55 | 89,100 |   |  |