| 
                 
                    Closing price on 7/13/2016
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    2.50 | 
                 
                
                    | High | 
                    2.90 | 
                 
                
                    | Low | 
                    2.50 | 
                     
                
                    | Volume | 
                    7,852,670 | 
                                 
                
                    | Split-adjusted Price | 
                    2.50 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
ACM Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                7/13/2016
             | 
            
                -0.20 / -7.41%
             |             
            
                2.50
             |           
            
                2.90
             |               
            
                2.50
             |                           
            
                2.50
             | 
            
                2.55
             |                     
            
                2.50
             |                                 
            
                7,852,670
             |            
            
                 
             |                                       
         
    
        
            | 
                7/12/2016
             | 
            
                -0.20 / -6.90%
             |             
            
                2.70
             |           
            
                2.70
             |               
            
                2.70
             |                           
            
                2.70
             | 
            
                2.70
             |                     
            
                2.70
             |                                 
            
                23,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/11/2016
             | 
            
                -0.30 / -9.38%
             |             
            
                2.90
             |           
            
                2.90
             |               
            
                2.90
             |                           
            
                2.90
             | 
            
                2.90
             |                     
            
                2.90
             |                                 
            
                208,320
             |            
            
                 
             |                                       
         
    
        
            | 
                7/8/2016
             | 
            
                -0.30 / -8.57%
             |             
            
                3.40
             |           
            
                3.40
             |               
            
                3.20
             |                           
            
                3.20
             | 
            
                3.23
             |                     
            
                3.20
             |                                 
            
                765,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/7/2016
             | 
            
                -0.10 / -2.78%
             |             
            
                3.60
             |           
            
                3.60
             |               
            
                3.40
             |                           
            
                3.50
             | 
            
                3.45
             |                     
            
                3.50
             |                                 
            
                892,810
             |            
            
                 
             |                                       
         
    
        
            | 
                7/6/2016
             | 
            
                +0.10 / +2.86%
             |             
            
                3.50
             |           
            
                3.60
             |               
            
                3.40
             |                           
            
                3.60
             | 
            
                3.49
             |                     
            
                3.60
             |                                 
            
                382,010
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/5/2016
             | 
            
                -0.20 / -5.41%
             |             
            
                3.70
             |           
            
                3.70
             |               
            
                3.40
             |                           
            
                3.50
             | 
            
                3.53
             |                     
            
                3.50
             |                                 
            
                801,600
             |            
            
                 
             |                                       
         
    
        
            | 
                7/4/2016
             | 
            
                +0.10 / +2.78%
             |             
            
                3.60
             |           
            
                3.70
             |               
            
                3.60
             |                           
            
                3.70
             | 
            
                3.60
             |                     
            
                3.70
             |                                 
            
                420,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/1/2016
             | 
            
                0.00 / 0.00%
             |             
            
                3.60
             |           
            
                3.70
             |               
            
                3.60
             |                           
            
                3.60
             | 
            
                3.61
             |                     
            
                3.60
             |                                 
            
                409,100
             |            
            
                 
             |                                       
         
    
        
            | 
                6/30/2016
             | 
            
                -0.10 / -2.70%
             |             
            
                3.70
             |           
            
                3.80
             |               
            
                3.60
             |                           
            
                3.60
             | 
            
                3.70
             |                     
            
                3.60
             |                                 
            
                440,210
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/29/2016
             | 
            
                0.00 / 0.00%
             |             
            
                3.70
             |           
            
                3.80
             |               
            
                3.70
             |                           
            
                3.70
             | 
            
                3.70
             |                     
            
                3.70
             |                                 
            
                422,100
             |            
            
                 
             |                                       
         
    
        
            | 
                6/28/2016
             | 
            
                +0.10 / +2.78%
             |             
            
                3.60
             |           
            
                3.70
             |               
            
                3.60
             |                           
            
                3.70
             | 
            
                3.62
             |                     
            
                3.70
             |                                 
            
                117,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/27/2016
             | 
            
                -0.10 / -2.70%
             |             
            
                3.60
             |           
            
                3.60
             |               
            
                3.50
             |                           
            
                3.60
             | 
            
                3.59
             |                     
            
                3.60
             |                                 
            
                234,800
             |            
            
                 
             |                                       
         
    
        
            | 
                6/24/2016
             | 
            
                -0.20 / -5.13%
             |             
            
                3.90
             |           
            
                3.90
             |               
            
                3.60
             |                           
            
                3.70
             | 
            
                3.66
             |                     
            
                3.70
             |                                 
            
                1,446,110
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/23/2016
             | 
            
                +0.10 / +2.63%
             |             
            
                3.80
             |           
            
                3.90
             |               
            
                3.80
             |                           
            
                3.90
             | 
            
                3.83
             |                     
            
                3.90
             |                                 
            
                202,700
             |            
            
                 
             |                                       
         
    
        
            | 
                6/22/2016
             | 
            
                0.00 / 0.00%
             |             
            
                3.80
             |           
            
                3.90
             |               
            
                3.80
             |                           
            
                3.80
             | 
            
                3.84
             |                     
            
                3.80
             |                                 
            
                356,609
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/21/2016
             | 
            
                -0.20 / -5.00%
             |             
            
                4.00
             |           
            
                4.00
             |               
            
                3.70
             |                           
            
                3.80
             | 
            
                3.85
             |                     
            
                3.80
             |                                 
            
                1,954,800
             |            
            
                 
             |                                       
         
    
        
            | 
                6/20/2016
             | 
            
                -0.10 / -2.44%
             |             
            
                4.10
             |           
            
                4.10
             |               
            
                4.00
             |                           
            
                4.00
             | 
            
                4.01
             |                     
            
                4.00
             |                                 
            
                500,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/17/2016
             | 
            
                -0.30 / -6.82%
             |             
            
                4.20
             |           
            
                4.30
             |               
            
                4.10
             |                           
            
                4.10
             | 
            
                4.15
             |                     
            
                4.10
             |                                 
            
                415,500
             |            
            
                 
             |                                       
         
    
        
            | 
                6/16/2016
             | 
            
                0.00 / 0.00%
             |             
            
                4.40
             |           
            
                4.50
             |               
            
                4.30
             |                           
            
                4.40
             | 
            
                4.41
             |                     
            
                4.20
             |                                 
            
                1,047,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/15/2016
             | 
            
                +0.10 / +2.33%
             |             
            
                4.30
             |           
            
                4.40
             |               
            
                4.30
             |                           
            
                4.40
             | 
            
                4.30
             |                     
            
                4.20
             |                                 
            
                360,200
             |            
            
                 
             |                                       
         
    
        
            | 
                6/14/2016
             | 
            
                -0.10 / -2.27%
             |             
            
                4.40
             |           
            
                4.50
             |               
            
                4.30
             |                           
            
                4.30
             | 
            
                4.40
             |                     
            
                4.10
             |                                 
            
                465,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/13/2016
             | 
            
                +0.20 / +4.76%
             |             
            
                4.30
             |           
            
                4.50
             |               
            
                4.30
             |                           
            
                4.40
             | 
            
                4.45
             |                     
            
                4.20
             |                                 
            
                1,333,400
             |            
            
                 
             |                                       
         
    
        
            | 
                6/10/2016
             | 
            
                0.00 / 0.00%
             |             
            
                4.20
             |           
            
                4.30
             |               
            
                4.20
             |                           
            
                4.20
             | 
            
                4.20
             |                     
            
                4.01
             |                                 
            
                691,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/9/2016
             | 
            
                -0.10 / -2.33%
             |             
            
                4.30
             |           
            
                4.30
             |               
            
                4.20
             |                           
            
                4.20
             | 
            
                4.20
             |                     
            
                4.01
             |                                 
            
                731,700
             |            
            
                 
             |                                       
         
    
        
            | 
                6/8/2016
             | 
            
                0.00 / 0.00%
             |             
            
                4.30
             |           
            
                4.30
             |               
            
                4.20
             |                           
            
                4.30
             | 
            
                4.30
             |                     
            
                4.10
             |                                 
            
                590,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/7/2016
             | 
            
                0.00 / 0.00%
             |             
            
                4.30
             |           
            
                4.40
             |               
            
                4.20
             |                           
            
                4.30
             | 
            
                4.30
             |                     
            
                4.10
             |                                 
            
                369,332
             |            
            
                 
             |                                       
         
    
        
            | 
                6/6/2016
             | 
            
                -0.20 / -4.44%
             |             
            
                4.50
             |           
            
                4.50
             |               
            
                4.30
             |                           
            
                4.30
             | 
            
                4.33
             |                     
            
                4.10
             |                                 
            
                860,118
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/3/2016
             | 
            
                0.00 / 0.00%
             |             
            
                4.50
             |           
            
                4.50
             |               
            
                4.40
             |                           
            
                4.50
             | 
            
                4.46
             |                     
            
                4.30
             |                                 
            
                761,703
             |            
            
                 
             |                                       
         
    
        
            | 
                6/2/2016
             | 
            
                0.00 / 0.00%
             |             
            
                4.50
             |           
            
                4.60
             |               
            
                4.50
             |                           
            
                4.50
             | 
            
                4.50
             |                     
            
                4.30
             |                                 
            
                701,207
             |  
            
                 
             |                                                              
             
    
         
    
    
 |