| 
                 
                    Closing price on 5/15/2018
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    30.10 | 
                 
                
                    | High | 
                    31.00 | 
                 
                
                    | Low | 
                    30.10 | 
                     
                
                    | Volume | 
                    7,500 | 
                                 
                
                    | Split-adjusted Price | 
                    19.45 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PGS Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                5/15/2018
             | 
            
                -1.10 / -3.49%
             |             
            
                30.10
             |           
            
                31.00
             |               
            
                30.10
             |                           
            
                30.40
             | 
            
                30.40
             |                     
            
                19.45
             |                                 
            
                7,500
             |            
            
                 
             |                                       
         
    
        
            | 
                5/14/2018
             | 
            
                +0.20 / +0.64%
             |             
            
                31.50
             |           
            
                31.50
             |               
            
                31.50
             |                           
            
                31.50
             | 
            
                31.50
             |                     
            
                20.16
             |                                 
            
                100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/11/2018
             | 
            
                +0.30 / +0.97%
             |             
            
                30.00
             |           
            
                31.30
             |               
            
                30.00
             |                           
            
                31.30
             | 
            
                30.01
             |                     
            
                20.03
             |                                 
            
                13,100
             |            
            
                 
             |                                       
         
    
        
            | 
                5/10/2018
             | 
            
                0.00 / 0.00%
             |             
            
                30.60
             |           
            
                31.00
             |               
            
                30.60
             |                           
            
                31.00
             | 
            
                30.76
             |                     
            
                19.84
             |                                 
            
                500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/9/2018
             | 
            
                -0.80 / -2.52%
             |             
            
                31.00
             |           
            
                31.00
             |               
            
                31.00
             |                           
            
                31.00
             | 
            
                31.00
             |                     
            
                19.84
             |                                 
            
                20,000
             |            
            
                 
             |                                       
         
    
        
            | 
                5/8/2018
             | 
            
                +1.80 / +6.00%
             |             
            
                30.50
             |           
            
                31.80
             |               
            
                30.50
             |                           
            
                31.80
             | 
            
                30.64
             |                     
            
                20.35
             |                                 
            
                900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/7/2018
             | 
            
                -1.00 / -3.23%
             |             
            
                31.70
             |           
            
                31.70
             |               
            
                30.00
             |                           
            
                30.00
             | 
            
                30.14
             |                     
            
                19.20
             |                                 
            
                3,300
             |            
            
                 
             |                                       
         
    
        
            | 
                5/4/2018
             | 
            
                0.00 / 0.00%
             |             
            
                31.00
             |           
            
                32.00
             |               
            
                31.00
             |                           
            
                31.00
             | 
            
                31.86
             |                     
            
                19.84
             |                                 
            
                111,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/3/2018
             | 
            
                +0.70 / +2.31%
             |             
            
                29.00
             |           
            
                31.00
             |               
            
                29.00
             |                           
            
                31.00
             | 
            
                30.30
             |                     
            
                19.84
             |                                 
            
                161,200
             |            
            
                 
             |                                       
         
    
        
            | 
                5/2/2018
             | 
            
                +0.30 / +1.00%
             |             
            
                30.00
             |           
            
                30.30
             |               
            
                30.00
             |                           
            
                30.30
             | 
            
                30.00
             |                     
            
                19.39
             |                                 
            
                389,715
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/27/2018
             | 
            
                0.00 / 0.00%
             |             
            
                30.00
             |           
            
                30.00
             |               
            
                30.00
             |                           
            
                30.00
             | 
            
                30.00
             |                     
            
                19.20
             |                                 
            
                29,200
             |            
            
                 
             |                                       
         
    
        
            | 
                4/26/2018
             | 
            
                -1.00 / -3.23%
             |             
            
                32.00
             |           
            
                32.50
             |               
            
                30.00
             |                           
            
                30.00
             | 
            
                30.30
             |                     
            
                19.20
             |                                 
            
                3,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/24/2018
             | 
            
                0.00 / 0.00%
             |             
            
                31.00
             |           
            
                31.00
             |               
            
                31.00
             |                           
            
                31.00
             | 
            
                31.00
             |                     
            
                19.84
             |                                 
            
                121,900
             |            
            
                 
             |                                       
         
    
        
            | 
                4/23/2018
             | 
            
                0.00 / 0.00%
             |             
            
                31.00
             |           
            
                31.00
             |               
            
                31.00
             |                           
            
                31.00
             | 
            
                31.00
             |                     
            
                19.84
             |                                 
            
                19,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/20/2018
             | 
            
                0.00 / 0.00%
             |             
            
                31.00
             |           
            
                31.00
             |               
            
                31.00
             |                           
            
                31.00
             | 
            
                31.00
             |                     
            
                19.84
             |                                 
            
                3,500
             |            
            
                 
             |                                       
         
    
        
            | 
                4/19/2018
             | 
            
                0.00 / 0.00%
             |             
            
                31.00
             |           
            
                31.00
             |               
            
                30.80
             |                           
            
                31.00
             | 
            
                31.00
             |                     
            
                19.84
             |                                 
            
                56,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/18/2018
             | 
            
                +0.60 / +1.97%
             |             
            
                30.40
             |           
            
                31.00
             |               
            
                30.40
             |                           
            
                31.00
             | 
            
                30.99
             |                     
            
                19.84
             |                                 
            
                42,300
             |            
            
                 
             |                                       
         
    
        
            | 
                4/17/2018
             | 
            
                0.00 / 0.00%
             |             
            
                30.40
             |           
            
                30.40
             |               
            
                30.40
             |                           
            
                30.40
             | 
            
                30.40
             |                     
            
                19.45
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/16/2018
             | 
            
                +0.20 / +0.66%
             |             
            
                32.00
             |           
            
                32.00
             |               
            
                30.40
             |                           
            
                30.40
             | 
            
                31.20
             |                     
            
                19.45
             |                                 
            
                200
             |            
            
                 
             |                                       
         
    
        
            | 
                4/13/2018
             | 
            
                -1.20 / -3.82%
             |             
            
                31.00
             |           
            
                31.00
             |               
            
                30.20
             |                           
            
                30.20
             | 
            
                30.87
             |                     
            
                19.33
             |                                 
            
                4,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/12/2018
             | 
            
                0.00 / 0.00%
             |             
            
                31.40
             |           
            
                31.40
             |               
            
                31.40
             |                           
            
                31.40
             | 
            
                31.40
             |                     
            
                20.09
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                4/11/2018
             | 
            
                +0.80 / +2.61%
             |             
            
                30.70
             |           
            
                31.50
             |               
            
                30.70
             |                           
            
                31.40
             | 
            
                30.80
             |                     
            
                20.09
             |                                 
            
                14,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/10/2018
             | 
            
                -0.90 / -2.86%
             |             
            
                31.40
             |           
            
                31.40
             |               
            
                30.60
             |                           
            
                30.60
             | 
            
                31.00
             |                     
            
                19.58
             |                                 
            
                200
             |            
            
                 
             |                                       
         
    
        
            | 
                4/9/2018
             | 
            
                +0.50 / +1.61%
             |             
            
                30.50
             |           
            
                31.50
             |               
            
                30.50
             |                           
            
                31.50
             | 
            
                30.53
             |                     
            
                20.16
             |                                 
            
                16,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/6/2018
             | 
            
                0.00 / 0.00%
             |             
            
                31.10
             |           
            
                31.10
             |               
            
                31.00
             |                           
            
                31.00
             | 
            
                31.01
             |                     
            
                19.84
             |                                 
            
                4,400
             |            
            
                 
             |                                       
         
    
        
            | 
                4/5/2018
             | 
            
                -0.80 / -2.52%
             |             
            
                33.00
             |           
            
                33.00
             |               
            
                31.00
             |                           
            
                31.00
             | 
            
                31.33
             |                     
            
                19.84
             |                                 
            
                668
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/4/2018
             | 
            
                +0.20 / +0.63%
             |             
            
                29.20
             |           
            
                32.50
             |               
            
                29.20
             |                           
            
                31.80
             | 
            
                31.42
             |                     
            
                20.35
             |                                 
            
                46,400
             |            
            
                 
             |                                       
         
    
        
            | 
                4/3/2018
             | 
            
                0.00 / 0.00%
             |             
            
                31.60
             |           
            
                31.60
             |               
            
                31.60
             |                           
            
                31.60
             | 
            
                31.60
             |                     
            
                20.22
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/2/2018
             | 
            
                -0.40 / -1.25%
             |             
            
                31.50
             |           
            
                31.60
             |               
            
                31.50
             |                           
            
                31.60
             | 
            
                31.53
             |                     
            
                20.22
             |                                 
            
                300
             |            
            
                 
             |                                       
         
    
        
            | 
                3/30/2018
             | 
            
                -1.00 / -3.03%
             |             
            
                32.00
             |           
            
                32.00
             |               
            
                32.00
             |                           
            
                32.00
             | 
            
                32.00
             |                     
            
                20.48
             |                                 
            
                1,500
             |  
            
                 
             |                                                              
             
    
         
    
    
 |