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                    Closing price on 1/4/2021
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        |           
                
                    | Open | 7.20 |  
                    | High | 7.80 |  
                    | Low | 7.20 |  
                    | Volume | 28,000 |  
                    | Split-adjusted Price | 6.16 |  
                
             | 
 |  NST Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 1/4/2021 | +0.20 / +2.70% | 7.20 | 7.80 | 7.20 | 7.60 | 7.54 | 6.16 | 28,000 |   |  
            | 12/31/2020 | 0.00 / 0.00% | 7.40 | 7.40 | 7.10 | 7.40 | 7.26 | 6.00 | 19,100 |   |  			
            | 12/30/2020 | +0.20 / +2.78% | 7.30 | 7.50 | 7.20 | 7.40 | 7.32 | 6.00 | 28,100 |   |  
            | 12/29/2020 | -0.10 / -1.37% | 7.40 | 7.40 | 7.20 | 7.20 | 7.29 | 5.84 | 24,500 |   |  			
            | 12/28/2020 | +0.20 / +2.82% | 7.10 | 7.50 | 7.10 | 7.30 | 7.23 | 5.92 | 56,200 |   |  
            | 12/25/2020 | 0.00 / 0.00% | 7.10 | 7.10 | 7.10 | 7.10 | 7.10 | 5.76 | 28,000 |   |  			
            | 12/24/2020 | -0.10 / -1.39% | 7.10 | 7.10 | 6.90 | 7.10 | 7.05 | 5.76 | 60,200 |   |  
            | 12/23/2020 | +0.10 / +1.41% | 7.20 | 7.30 | 7.00 | 7.20 | 7.12 | 5.84 | 60,500 |   |  			
            | 12/22/2020 | 0.00 / 0.00% | 7.00 | 7.20 | 6.80 | 7.10 | 6.94 | 5.76 | 25,800 |   |  
            | 12/21/2020 | 0.00 / 0.00% | 7.10 | 7.20 | 6.90 | 7.10 | 6.98 | 5.76 | 40,000 |   |  			
            | 12/18/2020 | -0.10 / -1.39% | 7.10 | 7.20 | 6.80 | 7.10 | 7.11 | 5.76 | 19,000 |   |  
            | 12/17/2020 | +0.30 / +4.35% | 6.80 | 7.30 | 6.50 | 7.20 | 6.91 | 5.84 | 81,900 |   |  			
            | 12/16/2020 | -0.10 / -1.43% | 6.80 | 6.90 | 6.70 | 6.90 | 6.81 | 5.60 | 24,700 |   |  
            | 12/15/2020 | -0.10 / -1.41% | 6.90 | 7.00 | 6.90 | 7.00 | 6.95 | 5.68 | 10,200 |   |  			
            | 12/14/2020 | +0.20 / +2.90% | 6.80 | 7.10 | 6.80 | 7.10 | 7.06 | 5.76 | 6,800 |   |  
            | 12/11/2020 | -0.20 / -2.82% | 6.90 | 7.00 | 6.80 | 6.90 | 6.94 | 5.60 | 31,000 |   |  			
            | 12/10/2020 | -0.40 / -5.33% | 7.50 | 7.50 | 7.10 | 7.10 | 7.17 | 5.76 | 1,200 |   |  
            | 12/9/2020 | -0.70 / -8.54% | 7.40 | 7.60 | 7.40 | 7.50 | 7.43 | 6.08 | 4,700 |   |  			
            | 12/8/2020 | +0.60 / +7.89% | 7.30 | 8.30 | 6.90 | 8.20 | 7.00 | 6.65 | 545,400 |   |  
            | 12/7/2020 | -0.80 / -9.52% | 7.60 | 8.00 | 7.60 | 7.60 | 7.62 | 6.16 | 28,900 |   |  			
            | 12/4/2020 | +0.30 / +3.70% | 7.70 | 8.40 | 7.30 | 8.40 | 7.34 | 6.81 | 56,100 |   |  
            | 12/3/2020 | -0.90 / -10.00% | 8.10 | 8.10 | 8.10 | 8.10 | 8.10 | 6.57 | 7,800 |   |  			
            | 12/2/2020 | -0.90 / -9.09% | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 | 7.30 | 300 |   |  
            | 12/1/2020 | 0.00 / 0.00% | 9.90 | 9.90 | 9.90 | 9.90 | 9.90 | 8.03 | 0 |   |  			
            | 11/30/2020 | +0.80 / +8.79% | 8.50 | 9.90 | 8.20 | 9.90 | 8.84 | 8.03 | 6,400 |   |  
            | 11/27/2020 | 0.00 / 0.00% | 8.90 | 9.10 | 8.20 | 9.10 | 8.37 | 7.38 | 35,900 |   |  			
            | 11/26/2020 | +0.80 / +9.64% | 7.60 | 9.10 | 7.50 | 9.10 | 7.55 | 7.38 | 171,000 |   |  
            | 11/25/2020 | 0.00 / 0.00% | 8.30 | 8.30 | 8.30 | 8.30 | 8.30 | 6.73 | 0 |   |  			
            | 11/24/2020 | 0.00 / 0.00% | 8.30 | 8.30 | 8.30 | 8.30 | 8.30 | 6.73 | 0 |   |  
            | 11/23/2020 | +0.30 / +3.75% | 8.30 | 8.30 | 8.30 | 8.30 | 8.30 | 6.73 | 100 |   |  |