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                    Closing price on 6/9/2021
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        |           
                
                    | Open | 3.50 |  
                    | High | 3.60 |  
                    | Low | 3.40 |  
                    | Volume | 36,100 |  
                    | Split-adjusted Price | 3.60 |  
                
             | 
 |  SDD Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 6/9/2021 | +0.10 / +2.86% | 3.50 | 3.60 | 3.40 | 3.60 | 3.50 | 3.60 | 36,100 |   |  
            | 6/8/2021 | +0.10 / +2.94% | 3.60 | 3.70 | 3.30 | 3.50 | 3.50 | 3.50 | 68,100 |   |  			
            | 6/7/2021 | +0.10 / +2.86% | 3.50 | 3.60 | 3.30 | 3.60 | 3.44 | 3.60 | 109,600 |   |  
            | 6/4/2021 | -0.20 / -5.26% | 3.70 | 3.70 | 3.30 | 3.60 | 3.50 | 3.60 | 70,800 |   |  			
            | 6/3/2021 | +0.40 / +11.76% | 3.60 | 3.90 | 3.60 | 3.80 | 3.80 | 3.80 | 187,900 |   |  
            | 6/2/2021 | +0.40 / +12.90% | 3.30 | 3.50 | 3.30 | 3.50 | 3.40 | 3.50 | 180,200 |   |  			
            | 6/1/2021 | +0.20 / +6.45% | 3.00 | 3.30 | 3.00 | 3.30 | 3.10 | 3.30 | 67,700 |   |  
            | 5/31/2021 | -0.10 / -3.13% | 3.20 | 3.20 | 3.00 | 3.10 | 3.10 | 3.10 | 59,100 |   |  			
            | 5/28/2021 | +0.10 / +3.13% | 3.30 | 3.40 | 3.10 | 3.30 | 3.20 | 3.30 | 71,200 |   |  
            | 5/27/2021 | 0.00 / 0.00% | 3.30 | 3.30 | 3.20 | 3.30 | 3.20 | 3.30 | 100,000 |   |  			
            | 5/26/2021 | 0.00 / 0.00% | 3.40 | 3.50 | 3.20 | 3.40 | 3.30 | 3.40 | 78,700 |   |  
            | 5/25/2021 | 0.00 / 0.00% | 3.40 | 3.50 | 3.30 | 3.40 | 3.40 | 3.40 | 63,100 |   |  			
            | 5/24/2021 | 0.00 / 0.00% | 3.40 | 3.50 | 3.40 | 3.40 | 3.40 | 3.40 | 38,600 |   |  
            | 5/21/2021 | 0.00 / 0.00% | 3.40 | 3.50 | 3.30 | 3.30 | 3.40 | 3.30 | 32,600 |   |  			
            | 5/20/2021 | 0.00 / 0.00% | 3.40 | 3.50 | 3.20 | 3.40 | 3.30 | 3.40 | 62,900 |   |  
            | 5/19/2021 | -0.10 / -2.86% | 3.50 | 3.50 | 3.20 | 3.40 | 3.39 | 3.40 | 47,600 |   |  			
            | 5/18/2021 | +0.10 / +2.94% | 3.60 | 3.60 | 3.40 | 3.50 | 3.53 | 3.50 | 60,000 |   |  
            | 5/17/2021 | 0.00 / 0.00% | 3.70 | 3.70 | 3.40 | 3.50 | 3.41 | 3.50 | 45,100 |   |  			
            | 5/14/2021 | 0.00 / 0.00% | 3.50 | 3.60 | 3.40 | 3.60 | 3.46 | 3.60 | 34,700 |   |  
            | 5/13/2021 | -0.30 / -7.89% | 3.70 | 3.70 | 3.50 | 3.50 | 3.56 | 3.50 | 62,700 |   |  			
            | 5/12/2021 | +0.40 / +11.76% | 3.50 | 3.80 | 3.50 | 3.80 | 3.75 | 3.80 | 58,000 |   |  
            | 5/11/2021 | +0.40 / +12.90% | 3.30 | 3.50 | 3.30 | 3.50 | 3.45 | 3.50 | 54,900 |   |  			
            | 5/10/2021 | -0.20 / -5.88% | 3.30 | 3.30 | 3.00 | 3.20 | 3.14 | 3.20 | 108,300 |   |  
            | 5/7/2021 | -0.40 / -10.81% | 3.60 | 3.70 | 3.20 | 3.30 | 3.38 | 3.30 | 155,700 |   |  			
            | 5/6/2021 | -0.10 / -2.70% | 3.80 | 3.80 | 3.60 | 3.60 | 3.70 | 3.60 | 21,000 |   |  
            | 5/5/2021 | +0.10 / +2.70% | 3.70 | 3.80 | 3.60 | 3.80 | 3.67 | 3.80 | 52,400 |   |  			
            | 5/4/2021 | -0.50 / -12.50% | 3.80 | 3.90 | 3.50 | 3.50 | 3.66 | 3.50 | 51,200 |   |  
            | 4/29/2021 | -0.10 / -2.50% | 4.30 | 4.30 | 3.90 | 3.90 | 4.02 | 3.90 | 37,800 |   |  			
            | 4/28/2021 | +0.50 / +14.29% | 3.50 | 4.00 | 3.50 | 4.00 | 3.95 | 4.00 | 121,800 |   |  
            | 4/27/2021 | -0.10 / -2.63% | 3.70 | 3.90 | 3.50 | 3.70 | 3.54 | 3.70 | 191,900 |   |  |