The PE Ratio as of June 2026 (TTM) for Prothena Corporation plc (PRTA) is -2.94

According to Prothena Corporation plc’s latest financial reports and current stock price. The company's current PE Ratio is -2.94. This represents a change of 89.42% compared to the average of -1.55 of the last 4 quarters.

Prothena Corporation plc (PRTA) Historical PE Ratio (quarterly & annually)

How has PRTA PE Ratio performed in the past?

The mean historical PE Ratio of Prothena Corporation plc over the last ten years is -4.80. The current -2.94 PE Ratio has changed 6.03% with respect to the historical average. Over the past ten years (40 quarters), PRTA's PE Ratio was at its highest in in the December 2022 quarter at 116.15. The PE Ratio was at its lowest in in the June 2017 quarter at -29.10.

Prothena Corporation plc (PRTA) PE Ratio by Quarter and Year

Discovering the peaks and valleys of Prothena Corporation plc PE Ratio, unveiling quarterly and yearly fluctuations to gain insights into the company’s financial performance and market dynamics, offering valuable data for investors and analysts alike.

Prothena Corporation plc (PRTA) Average PE Ratio

How has PRTA PE Ratio performed in the past?

The current PE Ratio of Prothena Corporation plc (PRTA) is greater than its 3-year, less than than its 5-year, and greater than its 10-year historical averages

Prothena Corporation plc (PRTA) PE Ratio vs. Peers

How is PRTA’s PE Ratio compared to its peers?

Prothena Corporation plc’s PE Ratio is greater than KalVista Pharmaceuticals, Inc. (-9.86), less than Bicycle Therapeutics plc (-1.29), greater than 4D Molecular Therapeutics, Inc. (-3.74), less than Verastem, Inc. (-2.08), greater than Olema Pharmaceuticals, Inc. (-5.48), greater than Ventyx Biosciences, Inc. (-9.36), less than Neumora Therapeutics, Inc. Common Stock (-1.44), greater than Corvus Pharmaceuticals, Inc. (-24.31), less than Gossamer Bio, Inc. (-0.21), less than Rigel Pharmaceuticals, Inc. (1.66),

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