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                    Closing price on 4/26/2021
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        |           
                
                    | Open | 8.60 |  
                    | High | 8.60 |  
                    | Low | 8.00 |  
                    | Volume | 38,100 |  
                    | Split-adjusted Price | 6.81 |  
                
             | 
 |  NST Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 4/26/2021 | -0.20 / -2.33% | 8.60 | 8.60 | 8.00 | 8.40 | 8.46 | 6.81 | 38,100 |   |  
            | 4/23/2021 | +0.10 / +1.18% | 8.50 | 8.70 | 8.50 | 8.60 | 8.51 | 6.97 | 13,200 |   |  			
            | 4/22/2021 | -0.20 / -2.30% | 8.70 | 8.70 | 8.50 | 8.50 | 8.62 | 6.89 | 7,900 |   |  
            | 4/20/2021 | 0.00 / 0.00% | 8.70 | 8.80 | 8.70 | 8.70 | 8.72 | 7.06 | 11,700 |   |  			
            | 4/19/2021 | 0.00 / 0.00% | 8.70 | 8.70 | 8.70 | 8.70 | 8.70 | 7.06 | 13,200 |   |  
            | 4/16/2021 | -0.20 / -2.25% | 8.90 | 9.00 | 8.70 | 8.70 | 8.80 | 7.06 | 31,900 |   |  			
            | 4/15/2021 | -0.10 / -1.11% | 8.90 | 9.00 | 8.80 | 8.90 | 8.93 | 7.22 | 37,400 |   |  
            | 4/14/2021 | +0.20 / +2.27% | 9.00 | 9.00 | 8.90 | 9.00 | 8.92 | 7.30 | 12,000 |   |  			
            | 4/13/2021 | -0.30 / -3.30% | 9.10 | 9.10 | 8.80 | 8.80 | 8.93 | 7.14 | 18,200 |   |  
            | 4/12/2021 | 0.00 / 0.00% | 9.20 | 9.20 | 9.00 | 9.10 | 9.07 | 7.38 | 39,900 |   |  			
            | 4/9/2021 | +0.10 / +1.11% | 9.00 | 9.10 | 8.90 | 9.10 | 8.99 | 7.38 | 24,700 |   |  
            | 4/8/2021 | -0.30 / -3.23% | 9.40 | 9.40 | 8.90 | 9.00 | 9.06 | 7.30 | 30,100 |   |  			
            | 4/7/2021 | +0.40 / +4.49% | 9.00 | 9.40 | 9.00 | 9.30 | 9.16 | 7.54 | 60,200 |   |  
            | 4/6/2021 | +0.20 / +2.30% | 8.90 | 9.00 | 8.70 | 8.90 | 8.85 | 7.22 | 43,000 |   |  			
            | 4/5/2021 | +0.20 / +2.35% | 8.70 | 8.80 | 8.60 | 8.70 | 8.68 | 7.06 | 31,100 |   |  
            | 4/2/2021 | 0.00 / 0.00% | 8.50 | 8.70 | 8.50 | 8.50 | 8.53 | 6.89 | 4,400 |   |  			
            | 4/1/2021 | +0.10 / +1.19% | 8.40 | 8.60 | 8.30 | 8.50 | 8.43 | 6.89 | 21,800 |   |  
            | 3/31/2021 | -0.10 / -1.18% | 8.60 | 8.60 | 8.40 | 8.40 | 8.48 | 6.81 | 14,400 |   |  			
            | 3/30/2021 | +0.10 / +1.19% | 8.60 | 8.70 | 8.30 | 8.50 | 8.46 | 6.89 | 12,800 |   |  
            | 3/29/2021 | 0.00 / 0.00% | 8.40 | 8.50 | 8.30 | 8.40 | 8.41 | 6.81 | 3,100 |   |  			
            | 3/26/2021 | 0.00 / 0.00% | 8.40 | 8.40 | 8.10 | 8.40 | 8.26 | 6.81 | 16,000 |   |  
            | 3/25/2021 | -0.10 / -1.18% | 8.30 | 8.50 | 8.30 | 8.40 | 8.33 | 6.81 | 19,300 |   |  			
            | 3/24/2021 | -0.10 / -1.16% | 8.70 | 8.70 | 8.20 | 8.50 | 8.32 | 6.89 | 16,900 |   |  
            | 3/23/2021 | -0.10 / -1.15% | 8.90 | 8.90 | 8.60 | 8.60 | 8.64 | 6.97 | 27,700 |   |  			
            | 3/22/2021 | -0.10 / -1.14% | 8.80 | 8.80 | 8.70 | 8.70 | 8.75 | 7.06 | 14,200 |   |  
            | 3/19/2021 | -0.10 / -1.12% | 8.80 | 8.80 | 8.50 | 8.80 | 8.69 | 7.14 | 28,700 |   |  			
            | 3/18/2021 | +0.10 / +1.14% | 8.90 | 8.90 | 8.70 | 8.90 | 8.81 | 7.22 | 15,400 |   |  
            | 3/17/2021 | -0.10 / -1.12% | 8.80 | 8.80 | 8.70 | 8.80 | 8.73 | 7.14 | 13,600 |   |  			
            | 3/16/2021 | +0.10 / +1.14% | 8.80 | 8.90 | 8.80 | 8.90 | 8.80 | 7.22 | 20,100 |   |  
            | 3/15/2021 | 0.00 / 0.00% | 8.90 | 8.90 | 8.70 | 8.80 | 8.73 | 7.14 | 49,800 |   |  |