PRTA Historical PE Ratio image   This PRTA PE ratio history page last updated 11/19/2021
PRTA Historical PE Ratio Chart
Data adjusted for PRTA split history

PeriodPriceGAAPAnnualizedPE
Q3 2021
11/4/2021
56.432.138.526.6
Q2 2021
8/5/2021
55.940.582.3224.1
Q1 2021
5/11/2021
22.97-0.91-3.64NA
Q4 2020
2/11/2021
15.70-0.77-3.08NA
Q3 2020
11/4/2020
13.94-0.77-3.08NA
Q2 2020
8/6/2020
12.91-0.66-2.64NA
Q1 2020
5/6/2020
11.92-0.59-2.36NA
Q4 2019
2/12/2020
13.51-0.54-2.16NA
Q3 2019
11/5/2019
9.46-0.49-1.96NA
Q2 2019
8/6/2019
9.22-0.40-1.60NA
Q1 2019
5/7/2019
10.34-0.52-2.08NA
Q4 2018
2/14/2019
12.75-0.56-2.24NA
Q3 2018
11/6/2018
12.81-0.62-2.48NA
Q2 2018
8/7/2018
14.34-0.98-3.92NA
Q1 2018
5/8/2018
14.25-1.26-5.04NA
Q4 2017
2/14/2018
30.95-1.24-4.96NA
Q3 2017
11/7/2017
60.96-1.37-5.48NA
Q2 2017
8/8/2017
61.69-0.46-1.84NA
Q1 2017
5/9/2017
50.77-0.99-3.96NA
Q4 2016
2/14/2017
52.04-1.41-5.64NA
Q3 2016
11/1/2016
47.93-1.26-5.04NA
Q2 2016
8/2/2016
55.61-1.18-4.72NA
Q1 2016
5/3/2016
41.56-0.81-3.24NA
Q4 2015
2/18/2016
31.89-0.76-3.04NA
Q3 2015
11/2/2015
55.05-0.73-2.92NA
Q2 2015
8/4/2015
68.33-0.59-2.36NA
Q1 2015
5/5/2015
31.59-0.55-2.20NA
Q4 2014
3/5/2015
26.58-0.48-1.92NA
Q3 2014
11/3/2014
22.19-0.48-1.92NA
Q2 2014
8/4/2014
18.890.060.2478.7
Q1 2014
5/5/2014
21.690.783.127.0
PRTA PE History Chart
PeriodPriceGAAPTTMPE
Q3 2021
11/4/2021
56.432.131.0354.8
Q2 2021
8/5/2021
55.940.58-1.87NA
Q1 2021
5/11/2021
22.97-0.91-3.11NA
Q4 2020
2/11/2021
15.70-0.77-2.79NA
Q3 2020
11/4/2020
13.94-0.77-2.56NA
Q2 2020
8/6/2020
12.91-0.66-2.28NA
Q1 2020
5/6/2020
11.92-0.59-2.02NA
Q4 2019
2/12/2020
13.51-0.54-1.95NA
Q3 2019
11/5/2019
9.46-0.49-1.97NA
Q2 2019
8/6/2019
9.22-0.40-2.10NA
Q1 2019
5/7/2019
10.34-0.52-2.68NA
Q4 2018
2/14/2019
12.75-0.56-3.42NA
Q3 2018
11/6/2018
12.81-0.62-4.10NA
Q2 2018
8/7/2018
14.34-0.98-4.85NA
Q1 2018
5/8/2018
14.25-1.26-4.33NA
Q4 2017
2/14/2018
30.95-1.24-4.06NA
Q3 2017
11/7/2017
60.96-1.37-4.23NA
Q2 2017
8/8/2017
61.69-0.46-4.12NA
Q1 2017
5/9/2017
50.77-0.99-4.84NA
Q4 2016
2/14/2017
52.04-1.41-4.66NA
Q3 2016
11/1/2016
47.93-1.26-4.01NA
Q2 2016
8/2/2016
55.61-1.18-3.48NA
Q1 2016
5/3/2016
41.56-0.81-2.89NA
Q4 2015
2/18/2016
31.89-0.76-2.63NA
Q3 2015
11/2/2015
55.05-0.73-2.35NA
Q2 2015
8/4/2015
68.33-0.59-2.10NA
Q1 2015
5/5/2015
31.59-0.55-1.45NA
Q4 2014
3/5/2015
26.58-0.48-0.12NA
Q3 2014
11/3/2014
22.19-0.48NANA
Q2 2014
8/4/2014
18.890.06NANA
Q1 2014
5/5/2014
21.690.78NANA
How should the PRTA historical PE ratio be determined?
Realizing that PE stands for Price to Earnings ratio, we need two values to compute it: stock price and earnings per share. The stock price at any given date is a known historical value, but what about the earnings number to use?

✔️Accepted answer: There are a number of different approaches when it comes to calculating a historical PE ratio for a company like Prothena Corp. We like to take our measurements on each of the past quarterly earnings reports. That only leaves the question of whether the earnings number at that quarterly report should be used on an annualized basis, or some other method. We approach this question using three different methods, on this PRTA Historical PE Ratio page.

What is the average historical PE for PRTA based on annualized quarterly earnings?
As we look back through earnings history, what is the resulting PE calculation if at each measurement period we use that quarter's earnings result annualized?

✔️Accepted answer: The PRTA historical PE ratio using the annualized quarterly earnings method works out to 29.1.

What is the average historical PE for PRTA based on trailing twelve month earnings?
As we look back through earnings history, what is the resulting PE calculation if at each measurement period we use the trailing twelve months combined earnings result in the calculation?

✔️Accepted answer: The PRTA historical PE ratio using the TTM earnings method works out to 54.8.

On this page we presented the PRTA Historical PE Ratio information for Prothena Corp' stock. The average PRTA historical PE based on using the annualized quarterly earnings result at each measurement period (for the "E" in the PE calculation; and the closing price on earnings date as the "P") is 29.1. Meanwhile, using the trailing twelve month (TTM) quarterly earnings result as our method of calculation the "E" value at each measurement period, the average PRTA historical PE based on this TTM earnings result method is 54.8. Note: any PE calculations involving negative earnings were discarded as not meaningful.

Let's now compare this PRTA historical PE result, against the recent PE: when this page was posted on 11/18/2021, the most recent closing price for PRTA had been 54.59, and the most recent quarterly earnings result, annualized, was 8.52. Meanwhile, the most recent TTM earnings summed to 1.03. From these numbers, we calculate the recent PRTA PE on 11/18/2021 based on annualized quarterly EPS was 6.4. Based on PRTA's history, that recent PE is low relative to the historical average, with the recent PE 78.0% lower than the historical average PE across our data set for Prothena Corp. Looking at the recent PRTA PE on 11/18/2021 based on TTM EPS, we calculate the ratio at 53.0. Based on PRTA's history, that recent PE is low relative to the historical average, with the recent PE 3.3% lower than the average PE across our Prothena Corp data set with TTM EPS used in the calculation at each period.

For self directed investors doing their due diligence on PRTA or any other given stock, valuation analysis for PRTA can greatly benefit from studying the past earnings and resulting PE calculations. This exercise can help inform an analysis as to whether the past earnings trajectory and current versus historical PE ratios justify the current stock value.

That's why we bring you HistoricalPERatio.com to make it easy for investors to investigate Prothena Corp PE history or the past PE information for any stock in our coverage universe. And in your continued research we hope you will be sure to check out the further links included for earnings surprises history (beat/miss data) as well as next earnings dates for PRTA. Thanks for visiting, and the next time you need to research PRTA Historical PE Ratio or the ratio for another stock, we hope you'll think of our site, as your go-to historical PE ratio research resource of choice.
 

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