| 
                 
                    Closing price on 3/6/2019
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    36.80 | 
                 
                
                    | High | 
                    36.80 | 
                 
                
                    | Low | 
                    33.30 | 
                     
                
                    | Volume | 
                    32,400 | 
                                 
                
                    | Split-adjusted Price | 
                    22.69 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PGS Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                3/6/2019
             | 
            
                -1.60 / -4.57%
             |             
            
                36.80
             |           
            
                36.80
             |               
            
                33.30
             |                           
            
                33.40
             | 
            
                35.34
             |                     
            
                22.69
             |                                 
            
                32,400
             |            
            
                 
             |                                       
         
    
        
            | 
                3/5/2019
             | 
            
                -1.70 / -4.63%
             |             
            
                36.50
             |           
            
                40.00
             |               
            
                34.00
             |                           
            
                35.00
             | 
            
                34.24
             |                     
            
                23.77
             |                                 
            
                30,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/4/2019
             | 
            
                +0.70 / +1.94%
             |             
            
                35.90
             |           
            
                37.00
             |               
            
                34.00
             |                           
            
                36.70
             | 
            
                34.03
             |                     
            
                24.93
             |                                 
            
                81,000
             |            
            
                 
             |                                       
         
    
        
            | 
                3/1/2019
             | 
            
                -1.00 / -2.70%
             |             
            
                33.60
             |           
            
                36.00
             |               
            
                33.60
             |                           
            
                36.00
             | 
            
                33.90
             |                     
            
                24.45
             |                                 
            
                27,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/28/2019
             | 
            
                +2.00 / +5.71%
             |             
            
                37.00
             |           
            
                37.00
             |               
            
                37.00
             |                           
            
                37.00
             | 
            
                37.00
             |                     
            
                25.13
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                2/27/2019
             | 
            
                -0.50 / -1.41%
             |             
            
                35.40
             |           
            
                36.40
             |               
            
                34.00
             |                           
            
                35.00
             | 
            
                34.38
             |                     
            
                23.77
             |                                 
            
                1,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/26/2019
             | 
            
                +0.10 / +0.28%
             |             
            
                34.10
             |           
            
                35.50
             |               
            
                34.00
             |                           
            
                35.50
             | 
            
                34.11
             |                     
            
                24.11
             |                                 
            
                8,000
             |            
            
                 
             |                                       
         
    
        
            | 
                2/25/2019
             | 
            
                +0.40 / +1.14%
             |             
            
                34.00
             |           
            
                35.80
             |               
            
                34.00
             |                           
            
                35.40
             | 
            
                34.73
             |                     
            
                24.04
             |                                 
            
                43,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/22/2019
             | 
            
                -1.50 / -4.11%
             |             
            
                34.30
             |           
            
                35.00
             |               
            
                34.00
             |                           
            
                35.00
             | 
            
                34.06
             |                     
            
                23.77
             |                                 
            
                5,500
             |            
            
                 
             |                                       
         
    
        
            | 
                2/21/2019
             | 
            
                +2.40 / +7.04%
             |             
            
                35.00
             |           
            
                36.90
             |               
            
                34.00
             |                           
            
                36.50
             | 
            
                34.91
             |                     
            
                24.79
             |                                 
            
                2,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/20/2019
             | 
            
                0.00 / 0.00%
             |             
            
                34.10
             |           
            
                34.10
             |               
            
                34.10
             |                           
            
                34.10
             | 
            
                34.10
             |                     
            
                23.16
             |                                 
            
                200,000
             |            
            
                 
             |                                       
         
    
        
            | 
                2/19/2019
             | 
            
                -0.80 / -2.29%
             |             
            
                34.00
             |           
            
                34.10
             |               
            
                34.00
             |                           
            
                34.10
             | 
            
                34.01
             |                     
            
                23.16
             |                                 
            
                700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/18/2019
             | 
            
                -0.10 / -0.29%
             |             
            
                35.10
             |           
            
                35.10
             |               
            
                34.00
             |                           
            
                34.90
             | 
            
                34.90
             |                     
            
                23.70
             |                                 
            
                49,400
             |            
            
                 
             |                                       
         
    
        
            | 
                2/15/2019
             | 
            
                0.00 / 0.00%
             |             
            
                34.60
             |           
            
                35.00
             |               
            
                34.60
             |                           
            
                35.00
             | 
            
                34.81
             |                     
            
                23.77
             |                                 
            
                29,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/14/2019
             | 
            
                0.00 / 0.00%
             |             
            
                35.00
             |           
            
                35.00
             |               
            
                35.00
             |                           
            
                35.00
             | 
            
                35.00
             |                     
            
                23.77
             |                                 
            
                10,500
             |            
            
                 
             |                                       
         
    
        
            | 
                2/13/2019
             | 
            
                +2.00 / +6.06%
             |             
            
                33.80
             |           
            
                35.00
             |               
            
                33.80
             |                           
            
                35.00
             | 
            
                34.14
             |                     
            
                23.77
             |                                 
            
                61,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/12/2019
             | 
            
                -1.40 / -4.07%
             |             
            
                33.00
             |           
            
                33.00
             |               
            
                33.00
             |                           
            
                33.00
             | 
            
                33.00
             |                     
            
                22.41
             |                                 
            
                2,100
             |            
            
                 
             |                                       
         
    
        
            | 
                2/11/2019
             | 
            
                +1.10 / +3.30%
             |             
            
                32.00
             |           
            
                34.40
             |               
            
                32.00
             |                           
            
                34.40
             | 
            
                32.31
             |                     
            
                23.36
             |                                 
            
                76,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/1/2019
             | 
            
                +0.80 / +2.46%
             |             
            
                31.50
             |           
            
                33.30
             |               
            
                31.50
             |                           
            
                33.30
             | 
            
                31.54
             |                     
            
                22.62
             |                                 
            
                8,200
             |            
            
                 
             |                                       
         
    
        
            | 
                1/31/2019
             | 
            
                0.00 / 0.00%
             |             
            
                33.50
             |           
            
                33.50
             |               
            
                32.50
             |                           
            
                32.50
             | 
            
                32.55
             |                     
            
                22.07
             |                                 
            
                2,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/30/2019
             | 
            
                0.00 / 0.00%
             |             
            
                32.40
             |           
            
                33.00
             |               
            
                32.40
             |                           
            
                32.50
             | 
            
                32.50
             |                     
            
                22.07
             |                                 
            
                14,900
             |            
            
                 
             |                                       
         
    
        
            | 
                1/29/2019
             | 
            
                -1.10 / -3.27%
             |             
            
                32.50
             |           
            
                32.50
             |               
            
                32.40
             |                           
            
                32.50
             | 
            
                32.49
             |                     
            
                22.07
             |                                 
            
                5,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/28/2019
             | 
            
                +1.10 / +3.38%
             |             
            
                33.60
             |           
            
                33.60
             |               
            
                33.60
             |                           
            
                33.60
             | 
            
                33.60
             |                     
            
                22.82
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                1/25/2019
             | 
            
                0.00 / 0.00%
             |             
            
                31.00
             |           
            
                32.50
             |               
            
                29.70
             |                           
            
                32.50
             | 
            
                31.26
             |                     
            
                22.07
             |                                 
            
                2,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/24/2019
             | 
            
                -0.50 / -1.52%
             |             
            
                32.50
             |           
            
                32.50
             |               
            
                32.50
             |                           
            
                32.50
             | 
            
                32.50
             |                     
            
                22.07
             |                                 
            
                500
             |            
            
                 
             |                                       
         
    
        
            | 
                1/23/2019
             | 
            
                -0.50 / -1.49%
             |             
            
                33.10
             |           
            
                33.40
             |               
            
                33.00
             |                           
            
                33.00
             | 
            
                33.25
             |                     
            
                22.41
             |                                 
            
                110,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/22/2019
             | 
            
                -0.10 / -0.30%
             |             
            
                34.00
             |           
            
                34.00
             |               
            
                32.50
             |                           
            
                33.50
             | 
            
                32.74
             |                     
            
                22.75
             |                                 
            
                3,900
             |            
            
                 
             |                                       
         
    
        
            | 
                1/21/2019
             | 
            
                +0.20 / +0.60%
             |             
            
                33.90
             |           
            
                34.30
             |               
            
                33.40
             |                           
            
                33.60
             | 
            
                33.91
             |                     
            
                22.82
             |                                 
            
                300,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/18/2019
             | 
            
                +0.40 / +1.21%
             |             
            
                34.30
             |           
            
                34.80
             |               
            
                30.20
             |                           
            
                33.40
             | 
            
                34.51
             |                     
            
                22.69
             |                                 
            
                200,700
             |            
            
                 
             |                                       
         
    
        
            | 
                1/17/2019
             | 
            
                -0.10 / -0.30%
             |             
            
                33.00
             |           
            
                33.00
             |               
            
                33.00
             |                           
            
                33.00
             | 
            
                33.00
             |                     
            
                22.41
             |                                 
            
                204,000
             |  
            
                 
             |                                                              
             
    
         
    
    
 |