PE Ratio Chart

View PE Ratio for PTCT.
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Sep '18
Jan '19
May '19
 
285.00
270.00
255.00
240.00
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Historical PE Ratio Data

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Date Value
March 30, 2026 8.485
March 27, 2026 8.548
March 26, 2026 8.660
March 25, 2026 8.628
March 24, 2026 8.342
March 23, 2026 8.585
March 20, 2026 8.441
March 19, 2026 8.670
March 18, 2026 8.660
March 17, 2026 8.718
March 16, 2026 8.623
March 13, 2026 8.336
March 12, 2026 8.190
March 11, 2026 8.488
March 10, 2026 8.862
March 09, 2026 8.841
March 06, 2026 8.120
March 05, 2026 8.186
March 04, 2026 8.310
March 03, 2026 8.323
March 02, 2026 8.579
February 27, 2026 8.814
February 26, 2026 8.802
February 25, 2026 8.759
February 24, 2026 8.916
Date Value
February 23, 2026 9.113
February 20, 2026 9.133
February 19, 2026 9.035
February 18, 2026 8.910
February 17, 2026 8.941
February 13, 2026 8.977
February 12, 2026 9.139
February 11, 2026 9.167
February 10, 2026 9.325
February 09, 2026 9.586
February 06, 2026 9.653
February 05, 2026 9.353
February 04, 2026 9.554
February 03, 2026 9.672
February 02, 2026 9.679
January 30, 2026 9.763
January 29, 2026 9.879
January 28, 2026 9.772
January 27, 2026 9.758
January 26, 2026 9.853
January 23, 2026 9.727
January 22, 2026 9.846
January 21, 2026 9.767
January 20, 2026 9.445
January 16, 2026 9.369

Price to Earnings Ratio (PE Ratio) Definition

The Price to Earnings Ratio (PE Ratio) is calculated by taking the stock price / EPS Diluted (TTM). This metric is considered a valuation metric that confirms whether the earnings of a company justifies the stock price. There isn't necesarily an optimum PE ratio, since different industries will have different ranges of PE Ratios. Because of this, PE Ratio is great to evaluate from a relative standpoint with other similar companies.

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PE Ratio Range, Past 5 Years

View PE Ratio Range, Past 5 Years
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PE Ratio Related Metrics

PS Ratio 6.173
Price 72.76
Earnings Yield -0.82%
Market Cap 6.063B
Operating PE Ratio 53.35