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                    Closing price on 9/17/2020
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        |           
                
                    | Open | 51.80 |  
                    | High | 53.30 |  
                    | Low | 51.50 |  
                    | Volume | 353,340 |  
                    | Split-adjusted Price | 31.89 |  
                
             | 
 |  PTB Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 9/17/2020 | +1.50 / +2.90% | 51.80 | 53.30 | 51.50 | 53.30 | 52.41 | 31.89 | 353,340 |   |  
            | 9/16/2020 | +0.50 / +0.97% | 51.30 | 52.00 | 51.30 | 51.80 | 51.69 | 30.99 | 76,170 |   |  			
            | 9/15/2020 | -0.70 / -1.35% | 52.00 | 52.30 | 51.20 | 51.30 | 51.95 | 30.69 | 218,170 |   |  
            | 9/14/2020 | +1.00 / +1.96% | 50.90 | 52.00 | 50.80 | 52.00 | 51.52 | 31.11 | 324,630 |   |  			
            | 9/11/2020 | +0.80 / +1.59% | 50.20 | 51.30 | 49.85 | 51.00 | 50.74 | 30.51 | 297,780 |   |  
            | 9/10/2020 | 0.00 / 0.00% | 50.20 | 50.50 | 49.70 | 50.20 | 50.06 | 30.03 | 164,550 |   |  			
            | 9/9/2020 | +1.50 / +3.08% | 48.40 | 50.50 | 48.00 | 50.20 | 49.17 | 30.03 | 160,540 |   |  
            | 9/8/2020 | -0.30 / -0.61% | 49.00 | 49.20 | 48.20 | 48.70 | 48.54 | 29.14 | 179,340 |   |  			
            | 9/7/2020 | -1.40 / -2.78% | 48.20 | 49.90 | 48.20 | 49.00 | 48.94 | 29.32 | 472,260 |   |  
            | 9/4/2020 | +0.70 / +1.41% | 49.00 | 50.40 | 48.80 | 50.40 | 49.89 | 30.15 | 104,290 |   |  			
            | 9/3/2020 | -0.30 / -0.60% | 50.50 | 50.50 | 49.50 | 49.70 | 50.07 | 29.73 | 112,000 |   |  
            | 9/1/2020 | -0.40 / -0.79% | 50.40 | 50.50 | 49.60 | 50.00 | 50.09 | 29.91 | 176,750 |   |  			
            | 8/31/2020 | -0.50 / -0.98% | 50.90 | 50.90 | 49.90 | 50.40 | 50.30 | 30.15 | 192,350 |   |  
            | 8/28/2020 | +0.10 / +0.20% | 51.00 | 51.80 | 50.60 | 50.90 | 51.00 | 30.45 | 227,860 |   |  			
            | 8/27/2020 | +1.30 / +2.63% | 49.50 | 51.50 | 49.50 | 50.80 | 50.68 | 30.39 | 346,280 |   |  
            | 8/26/2020 | +0.60 / +1.23% | 48.90 | 49.75 | 48.30 | 49.50 | 49.38 | 29.61 | 236,120 |   |  			
            | 8/25/2020 | +0.10 / +0.20% | 49.20 | 49.20 | 48.80 | 48.90 | 48.98 | 29.26 | 196,200 |   |  
            | 8/24/2020 | +1.00 / +2.09% | 48.10 | 49.50 | 48.10 | 48.80 | 48.69 | 29.20 | 115,370 |   |  			
            | 8/21/2020 | +1.40 / +3.02% | 46.70 | 48.00 | 46.40 | 47.80 | 47.18 | 28.60 | 198,070 |   |  
            | 8/20/2020 | -0.60 / -1.28% | 47.00 | 47.20 | 46.40 | 46.40 | 46.75 | 27.76 | 79,320 |   |  			
            | 8/19/2020 | +0.80 / +1.73% | 46.20 | 47.30 | 46.20 | 47.00 | 46.80 | 28.12 | 128,430 |   |  
            | 8/18/2020 | -0.10 / -0.22% | 47.00 | 47.00 | 46.10 | 46.20 | 46.35 | 27.64 | 61,150 |   |  			
            | 8/17/2020 | -0.20 / -0.43% | 46.50 | 46.90 | 46.05 | 46.30 | 46.18 | 27.70 | 67,540 |   |  
            | 8/14/2020 | -0.30 / -0.64% | 46.90 | 47.00 | 46.20 | 46.50 | 46.68 | 27.82 | 103,310 |   |  			
            | 8/13/2020 | +1.05 / +2.30% | 46.20 | 46.80 | 45.80 | 46.80 | 46.20 | 28.00 | 99,010 |   |  
            | 8/12/2020 | -0.30 / -0.65% | 46.05 | 47.00 | 45.60 | 45.75 | 45.93 | 27.37 | 76,590 |   |  			
            | 8/11/2020 | -0.35 / -0.75% | 47.20 | 47.20 | 46.00 | 46.05 | 46.09 | 27.55 | 61,070 |   |  
            | 8/10/2020 | +0.30 / +0.65% | 46.00 | 47.20 | 46.00 | 46.40 | 46.72 | 27.76 | 81,220 |   |  			
            | 8/7/2020 | -1.00 / -2.12% | 47.10 | 47.10 | 46.10 | 46.10 | 46.47 | 27.58 | 81,690 |   |  
            | 8/6/2020 | -0.10 / -0.21% | 47.00 | 47.80 | 46.90 | 47.10 | 47.06 | 28.18 | 70,130 |   |  |