| 
                 
                    Closing price on 8/2/2017
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    2.30 | 
                 
                
                    | High | 
                    2.40 | 
                 
                
                    | Low | 
                    2.10 | 
                     
                
                    | Volume | 
                    1,976,310 | 
                                 
                
                    | Split-adjusted Price | 
                    2.40 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
ACM Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                8/2/2017
             | 
            
                +0.10 / +4.35%
             |             
            
                2.30
             |           
            
                2.40
             |               
            
                2.10
             |                           
            
                2.40
             | 
            
                2.26
             |                     
            
                2.40
             |                                 
            
                1,976,310
             |            
            
                 
             |                                       
         
    
        
            | 
                8/1/2017
             | 
            
                0.00 / 0.00%
             |             
            
                2.50
             |           
            
                2.50
             |               
            
                2.30
             |                           
            
                2.30
             | 
            
                2.45
             |                     
            
                2.30
             |                                 
            
                2,805,431
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/31/2017
             | 
            
                +0.20 / +9.52%
             |             
            
                2.10
             |           
            
                2.30
             |               
            
                2.10
             |                           
            
                2.30
             | 
            
                2.26
             |                     
            
                2.30
             |                                 
            
                1,713,829
             |            
            
                 
             |                                       
         
    
        
            | 
                7/28/2017
             | 
            
                0.00 / 0.00%
             |             
            
                2.10
             |           
            
                2.20
             |               
            
                2.00
             |                           
            
                2.10
             | 
            
                2.09
             |                     
            
                2.10
             |                                 
            
                1,608,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/27/2017
             | 
            
                0.00 / 0.00%
             |             
            
                2.10
             |           
            
                2.10
             |               
            
                2.00
             |                           
            
                2.10
             | 
            
                2.08
             |                     
            
                2.10
             |                                 
            
                324,110
             |            
            
                 
             |                                       
         
    
        
            | 
                7/26/2017
             | 
            
                0.00 / 0.00%
             |             
            
                2.10
             |           
            
                2.20
             |               
            
                2.00
             |                           
            
                2.10
             | 
            
                2.10
             |                     
            
                2.10
             |                                 
            
                2,594,220
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/25/2017
             | 
            
                +0.10 / +5.00%
             |             
            
                2.00
             |           
            
                2.10
             |               
            
                2.00
             |                           
            
                2.10
             | 
            
                2.04
             |                     
            
                2.10
             |                                 
            
                1,090,552
             |            
            
                 
             |                                       
         
    
        
            | 
                7/24/2017
             | 
            
                0.00 / 0.00%
             |             
            
                2.10
             |           
            
                2.10
             |               
            
                2.00
             |                           
            
                2.00
             | 
            
                2.02
             |                     
            
                2.00
             |                                 
            
                1,102,410
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/21/2017
             | 
            
                +0.10 / +5.26%
             |             
            
                1.90
             |           
            
                2.00
             |               
            
                1.90
             |                           
            
                2.00
             | 
            
                1.97
             |                     
            
                2.00
             |                                 
            
                1,152,900
             |            
            
                 
             |                                       
         
    
        
            | 
                7/20/2017
             | 
            
                -0.20 / -9.52%
             |             
            
                2.00
             |           
            
                2.10
             |               
            
                1.90
             |                           
            
                1.90
             | 
            
                1.98
             |                     
            
                1.90
             |                                 
            
                947,841
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/19/2017
             | 
            
                +0.10 / +5.00%
             |             
            
                2.00
             |           
            
                2.10
             |               
            
                1.90
             |                           
            
                2.10
             | 
            
                2.00
             |                     
            
                2.10
             |                                 
            
                741,200
             |            
            
                 
             |                                       
         
    
        
            | 
                7/18/2017
             | 
            
                0.00 / 0.00%
             |             
            
                2.10
             |           
            
                2.10
             |               
            
                1.90
             |                           
            
                2.00
             | 
            
                2.00
             |                     
            
                2.00
             |                                 
            
                259,230
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/17/2017
             | 
            
                -0.10 / -4.76%
             |             
            
                2.00
             |           
            
                2.10
             |               
            
                2.00
             |                           
            
                2.00
             | 
            
                2.00
             |                     
            
                2.00
             |                                 
            
                971,517
             |            
            
                 
             |                                       
         
    
        
            | 
                7/14/2017
             | 
            
                0.00 / 0.00%
             |             
            
                2.10
             |           
            
                2.10
             |               
            
                2.00
             |                           
            
                2.10
             | 
            
                2.04
             |                     
            
                2.10
             |                                 
            
                431,690
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/13/2017
             | 
            
                +0.10 / +5.00%
             |             
            
                2.10
             |           
            
                2.10
             |               
            
                1.90
             |                           
            
                2.10
             | 
            
                2.00
             |                     
            
                2.10
             |                                 
            
                282,860
             |            
            
                 
             |                                       
         
    
        
            | 
                7/12/2017
             | 
            
                0.00 / 0.00%
             |             
            
                2.10
             |           
            
                2.10
             |               
            
                2.00
             |                           
            
                2.00
             | 
            
                2.00
             |                     
            
                2.00
             |                                 
            
                562,955
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/11/2017
             | 
            
                -0.10 / -4.76%
             |             
            
                2.20
             |           
            
                2.20
             |               
            
                1.90
             |                           
            
                2.00
             | 
            
                2.00
             |                     
            
                2.00
             |                                 
            
                1,302,400
             |            
            
                 
             |                                       
         
    
        
            | 
                7/10/2017
             | 
            
                -0.10 / -4.55%
             |             
            
                2.20
             |           
            
                2.20
             |               
            
                2.00
             |                           
            
                2.10
             | 
            
                2.10
             |                     
            
                2.10
             |                                 
            
                861,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/7/2017
             | 
            
                +0.20 / +10.00%
             |             
            
                2.00
             |           
            
                2.20
             |               
            
                2.00
             |                           
            
                2.20
             | 
            
                2.10
             |                     
            
                2.20
             |                                 
            
                1,552,665
             |            
            
                 
             |                                       
         
    
        
            | 
                7/6/2017
             | 
            
                0.00 / 0.00%
             |             
            
                2.00
             |           
            
                2.20
             |               
            
                2.00
             |                           
            
                2.00
             | 
            
                2.09
             |                     
            
                2.00
             |                                 
            
                2,409,140
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/5/2017
             | 
            
                +0.10 / +5.26%
             |             
            
                1.90
             |           
            
                2.00
             |               
            
                1.90
             |                           
            
                2.00
             | 
            
                1.94
             |                     
            
                2.00
             |                                 
            
                650,613
             |            
            
                 
             |                                       
         
    
        
            | 
                7/4/2017
             | 
            
                -0.10 / -5.00%
             |             
            
                2.00
             |           
            
                2.00
             |               
            
                1.90
             |                           
            
                1.90
             | 
            
                1.90
             |                     
            
                1.90
             |                                 
            
                421,975
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/3/2017
             | 
            
                +0.10 / +5.26%
             |             
            
                1.90
             |           
            
                2.00
             |               
            
                1.80
             |                           
            
                2.00
             | 
            
                1.90
             |                     
            
                2.00
             |                                 
            
                434,715
             |            
            
                 
             |                                       
         
    
        
            | 
                6/30/2017
             | 
            
                0.00 / 0.00%
             |             
            
                1.90
             |           
            
                2.00
             |               
            
                1.80
             |                           
            
                1.90
             | 
            
                1.90
             |                     
            
                1.90
             |                                 
            
                285,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/29/2017
             | 
            
                -0.10 / -5.00%
             |             
            
                2.00
             |           
            
                2.00
             |               
            
                1.80
             |                           
            
                1.90
             | 
            
                1.94
             |                     
            
                1.90
             |                                 
            
                1,147,506
             |            
            
                 
             |                                       
         
    
        
            | 
                6/28/2017
             | 
            
                +0.10 / +5.26%
             |             
            
                1.90
             |           
            
                2.00
             |               
            
                1.90
             |                           
            
                2.00
             | 
            
                1.97
             |                     
            
                2.00
             |                                 
            
                434,465
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/27/2017
             | 
            
                -0.10 / -5.00%
             |             
            
                2.00
             |           
            
                2.00
             |               
            
                1.90
             |                           
            
                1.90
             | 
            
                1.92
             |                     
            
                1.90
             |                                 
            
                186,310
             |            
            
                 
             |                                       
         
    
        
            | 
                6/26/2017
             | 
            
                +0.10 / +5.26%
             |             
            
                1.90
             |           
            
                2.00
             |               
            
                1.80
             |                           
            
                2.00
             | 
            
                1.88
             |                     
            
                2.00
             |                                 
            
                453,341
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/23/2017
             | 
            
                0.00 / 0.00%
             |             
            
                1.90
             |           
            
                2.00
             |               
            
                1.80
             |                           
            
                1.90
             | 
            
                1.90
             |                     
            
                1.90
             |                                 
            
                634,243
             |            
            
                 
             |                                       
         
    
        
            | 
                6/22/2017
             | 
            
                0.00 / 0.00%
             |             
            
                1.90
             |           
            
                2.00
             |               
            
                1.90
             |                           
            
                1.90
             | 
            
                1.90
             |                     
            
                1.90
             |                                 
            
                719,359
             |  
            
                 
             |                                                              
             
    
         
    
    
 |