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                    Closing price on 2/4/2021
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        |           
                
                    | Open | 1.70 |  
                    | High | 1.70 |  
                    | Low | 1.60 |  
                    | Volume | 1,243,100 |  
                    | Split-adjusted Price | 1.70 |  
                
             | 
 |  ACM Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 2/4/2021 | +0.10 / +6.25% | 1.70 | 1.70 | 1.60 | 1.70 | 1.70 | 1.70 | 1,243,100 |   |  
            | 2/3/2021 | +0.10 / +6.67% | 1.40 | 1.60 | 1.40 | 1.60 | 1.44 | 1.60 | 6,877,100 |   |  			
            | 2/2/2021 | -0.10 / -6.25% | 1.50 | 1.50 | 1.50 | 1.50 | 1.50 | 1.50 | 168,000 |   |  
            | 2/1/2021 | -0.10 / -5.88% | 1.60 | 1.60 | 1.60 | 1.60 | 1.60 | 1.60 | 512,200 |   |  			
            | 1/29/2021 | -0.10 / -5.56% | 1.70 | 1.70 | 1.70 | 1.70 | 1.70 | 1.70 | 381,500 |   |  
            | 1/28/2021 | -0.20 / -10.00% | 1.80 | 1.80 | 1.80 | 1.80 | 1.80 | 1.80 | 443,750 |   |  			
            | 1/27/2021 | -0.20 / -9.09% | 2.20 | 2.40 | 2.00 | 2.00 | 2.12 | 2.00 | 4,086,900 |   |  
            | 1/26/2021 | +0.20 / +10.00% | 2.00 | 2.20 | 1.80 | 2.20 | 2.17 | 2.20 | 8,599,100 |   |  			
            | 1/25/2021 | +0.10 / +5.26% | 2.00 | 2.00 | 1.90 | 2.00 | 1.99 | 2.00 | 4,698,000 |   |  
            | 1/22/2021 | +0.10 / +5.56% | 1.90 | 1.90 | 1.80 | 1.90 | 1.90 | 1.90 | 4,563,500 |   |  			
            | 1/21/2021 | +0.10 / +5.88% | 1.70 | 1.80 | 1.60 | 1.80 | 1.79 | 1.80 | 2,446,200 |   |  
            | 1/20/2021 | +0.10 / +6.25% | 1.60 | 1.70 | 1.50 | 1.70 | 1.62 | 1.70 | 5,467,600 |   |  			
            | 1/19/2021 | 0.00 / 0.00% | 1.60 | 1.70 | 1.50 | 1.60 | 1.59 | 1.60 | 7,060,100 |   |  
            | 1/18/2021 | +0.10 / +6.67% | 1.50 | 1.60 | 1.40 | 1.60 | 1.58 | 1.60 | 3,444,100 |   |  			
            | 1/15/2021 | +0.10 / +7.14% | 1.50 | 1.50 | 1.40 | 1.50 | 1.42 | 1.50 | 1,951,800 |   |  
            | 1/14/2021 | -0.10 / -6.67% | 1.50 | 1.50 | 1.40 | 1.40 | 1.42 | 1.40 | 1,414,400 |   |  			
            | 1/13/2021 | 0.00 / 0.00% | 1.60 | 1.60 | 1.40 | 1.50 | 1.49 | 1.50 | 2,881,400 |   |  
            | 1/12/2021 | +0.10 / +7.14% | 1.50 | 1.50 | 1.40 | 1.50 | 1.49 | 1.50 | 6,187,100 |   |  			
            | 1/11/2021 | +0.10 / +7.69% | 1.30 | 1.40 | 1.30 | 1.40 | 1.40 | 1.40 | 1,472,900 |   |  
            | 1/8/2021 | +0.10 / +8.33% | 1.20 | 1.30 | 1.20 | 1.30 | 1.30 | 1.30 | 2,678,400 |   |  			
            | 1/7/2021 | +0.10 / +9.09% | 1.10 | 1.20 | 1.10 | 1.20 | 1.18 | 1.20 | 1,495,600 |   |  
            | 1/6/2021 | -0.10 / -8.33% | 1.20 | 1.30 | 1.10 | 1.10 | 1.20 | 1.10 | 2,913,400 |   |  			
            | 1/5/2021 | -0.10 / -7.69% | 1.30 | 1.30 | 1.20 | 1.20 | 1.26 | 1.20 | 1,768,200 |   |  
            | 1/4/2021 | +0.10 / +8.33% | 1.20 | 1.30 | 1.10 | 1.30 | 1.22 | 1.30 | 2,189,300 |   |  			
            | 12/31/2020 | -0.10 / -7.69% | 1.30 | 1.30 | 1.20 | 1.20 | 1.23 | 1.20 | 2,207,900 |   |  
            | 12/30/2020 | +0.10 / +8.33% | 1.30 | 1.30 | 1.20 | 1.30 | 1.30 | 1.30 | 3,840,300 |   |  			
            | 12/29/2020 | +0.10 / +9.09% | 1.10 | 1.20 | 1.00 | 1.20 | 1.17 | 1.20 | 4,919,700 |   |  
            | 12/28/2020 | +0.10 / +10.00% | 1.10 | 1.10 | 0.90 | 1.10 | 1.04 | 1.10 | 1,846,200 |   |  			
            | 12/25/2020 | +0.10 / +11.11% | 1.00 | 1.00 | 0.90 | 1.00 | 0.96 | 1.00 | 982,300 |   |  
            | 12/24/2020 | -0.10 / -10.00% | 1.00 | 1.00 | 0.90 | 0.90 | 0.95 | 0.90 | 3,764,900 |   |  |  |