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                    Closing price on 10/20/2021
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        |           
                
                    | Open | 3.80 |  
                    | High | 4.00 |  
                    | Low | 3.70 |  
                    | Volume | 7,810,200 |  
                    | Split-adjusted Price | 4.00 |  
                
             | 
 |  ACM Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 10/20/2021 | +0.30 / +8.11% | 3.80 | 4.00 | 3.70 | 4.00 | 3.97 | 4.00 | 7,810,200 |   |  
            | 10/19/2021 | 0.00 / 0.00% | 3.70 | 3.80 | 3.60 | 3.70 | 3.71 | 3.70 | 1,269,100 |   |  			
            | 10/18/2021 | 0.00 / 0.00% | 3.70 | 3.80 | 3.60 | 3.70 | 3.72 | 3.70 | 2,367,900 |   |  
            | 10/15/2021 | +0.20 / +5.71% | 3.50 | 3.80 | 3.50 | 3.70 | 3.66 | 3.70 | 3,757,300 |   |  			
            | 10/14/2021 | 0.00 / 0.00% | 3.50 | 3.60 | 3.40 | 3.50 | 3.51 | 3.50 | 1,620,000 |   |  
            | 10/13/2021 | 0.00 / 0.00% | 3.50 | 3.60 | 3.40 | 3.50 | 3.50 | 3.50 | 1,159,700 |   |  			
            | 10/12/2021 | -0.10 / -2.78% | 3.60 | 3.60 | 3.40 | 3.50 | 3.51 | 3.50 | 1,848,400 |   |  
            | 10/11/2021 | 0.00 / 0.00% | 3.60 | 3.70 | 3.50 | 3.60 | 3.62 | 3.60 | 1,659,400 |   |  			
            | 10/8/2021 | -0.20 / -5.26% | 3.80 | 3.80 | 3.60 | 3.60 | 3.65 | 3.60 | 1,408,706 |   |  
            | 10/7/2021 | +0.20 / +5.56% | 3.60 | 3.80 | 3.50 | 3.80 | 3.64 | 3.80 | 2,519,600 |   |  			
            | 10/6/2021 | +0.10 / +2.86% | 3.50 | 3.60 | 3.40 | 3.60 | 3.51 | 3.60 | 1,025,200 |   |  
            | 10/5/2021 | +0.10 / +2.94% | 3.40 | 3.50 | 3.40 | 3.50 | 3.41 | 3.50 | 1,269,700 |   |  			
            | 10/4/2021 | 0.00 / 0.00% | 3.40 | 3.50 | 3.30 | 3.40 | 3.41 | 3.40 | 1,793,000 |   |  
            | 10/1/2021 | -0.10 / -2.86% | 3.50 | 3.50 | 3.30 | 3.40 | 3.41 | 3.40 | 1,688,000 |   |  			
            | 9/30/2021 | -0.20 / -5.41% | 3.70 | 3.70 | 3.40 | 3.50 | 3.52 | 3.50 | 3,210,300 |   |  
            | 9/29/2021 | -0.10 / -2.63% | 3.80 | 4.00 | 3.60 | 3.70 | 3.81 | 3.70 | 1,772,000 |   |  			
            | 9/28/2021 | +0.30 / +8.57% | 3.50 | 3.80 | 3.20 | 3.80 | 3.39 | 3.80 | 4,573,100 |   |  
            | 9/27/2021 | -0.30 / -7.89% | 3.80 | 3.80 | 3.50 | 3.50 | 3.56 | 3.50 | 5,220,700 |   |  			
            | 9/24/2021 | -0.40 / -9.52% | 4.20 | 4.20 | 3.80 | 3.80 | 3.88 | 3.80 | 4,992,900 |   |  
            | 9/23/2021 | -0.20 / -4.55% | 4.40 | 4.80 | 4.00 | 4.20 | 4.48 | 4.20 | 7,331,400 |   |  			
            | 9/22/2021 | +0.40 / +10.00% | 4.10 | 4.40 | 4.00 | 4.40 | 4.33 | 4.40 | 7,172,700 |   |  
            | 9/21/2021 | +0.10 / +2.56% | 3.90 | 4.10 | 3.80 | 4.00 | 3.96 | 4.00 | 4,611,100 |   |  			
            | 9/20/2021 | +0.30 / +8.33% | 3.60 | 3.90 | 3.60 | 3.90 | 3.84 | 3.90 | 2,813,700 |   |  
            | 9/17/2021 | -0.30 / -7.69% | 3.70 | 3.90 | 3.60 | 3.60 | 3.71 | 3.60 | 5,278,500 |   |  			
            | 9/16/2021 | -0.30 / -7.14% | 4.30 | 4.40 | 3.90 | 3.90 | 4.03 | 3.90 | 4,722,100 |   |  
            | 9/15/2021 | +0.30 / +7.69% | 3.70 | 4.20 | 3.70 | 4.20 | 4.15 | 4.20 | 7,371,300 |   |  			
            | 9/14/2021 | +0.30 / +8.33% | 3.60 | 3.90 | 3.60 | 3.90 | 3.85 | 3.90 | 5,324,600 |   |  
            | 9/13/2021 | +0.10 / +2.86% | 3.50 | 3.70 | 3.40 | 3.60 | 3.60 | 3.60 | 3,118,800 |   |  			
            | 9/10/2021 | -0.10 / -2.78% | 3.60 | 3.70 | 3.40 | 3.50 | 3.55 | 3.50 | 2,831,800 |   |  
            | 9/9/2021 | +0.30 / +9.09% | 3.20 | 3.60 | 3.20 | 3.60 | 3.40 | 3.60 | 3,522,500 |   |  |  |