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Prothena (PRTA)

(Real Time Quote from BATS)

$6.73 USD

6.73
47,206

-0.08 (-1.18%)

Updated Aug 4, 2025 10:06 AM ET

Zacks Rank:

This is our short term rating system that serves as a timeliness indicator for stocks over the next 1 to 3 months. How good is it? See rankings and related performance below.

Zacks Rank Definition Annualized Return
1Strong Buy23.75%
2Buy17.82%
3Hold9.58%
4Sell5.28%
5Strong Sell2.61%
S&P50011.30%

Zacks Rank Education - Learn about the Zacks Rank

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3-Hold of 5     3    

Style Scores:

The Style Scores are a complementary set of indicators to use alongside the Zacks Rank. It allows the user to better focus on the stocks that are the best fit for his or her personal trading style.

The scores are based on the trading styles of Value, Growth, and Momentum. There's also a VGM Score ('V' for Value, 'G' for Growth and 'M' for Momentum), which combines the weighted average of the individual style scores into one score.

  • Value Score A
  • Growth Score A
  • Momentum Score A
  • VGM Score A

Within each Score, stocks are graded into five groups: A, B, C, D and F. As you might remember from your school days, an A, is better than a B; a B is better than a C; a C is better than a D; and a D is better than an F.

As an investor, you want to buy stocks with the highest probability of success. That means you want to buy stocks with a Zacks Rank #1 or #2, Strong Buy or Buy, which also has a Score of an A or a B in your personal trading style.

Zacks Style Scores Education - Learn more about the Zacks Style Scores

D Value F Growth F Momentum F VGM

Industry Rank:

The Zacks Industry Rank assigns a rating to each of the 265 X (Expanded) Industries based on their average Zacks Rank.

An industry with a larger percentage of Zacks Rank #1's and #2's will have a better average Zacks Rank than one with a larger percentage of Zacks Rank #4's and #5's.

The industry with the best average Zacks Rank would be considered the top industry (1 out of 265), which would place it in the top 1% of Zacks Ranked Industries. The industry with the worst average Zacks Rank (265 out of 265) would place in the bottom 1%.

Zacks Rank Education -- Learn more about the Zacks Rank
Zacks Industry Rank Education -- Learn more about the Zacks Industry Rank

Bottom 42% (143 out of 246)

Industry: Medical - Biomedical and Genetics

Zacks News

Zacks Equity Research

Prothena (PRTA) Down 3.5% Since Earnings Report: Can It Rebound?

Prothena (PRTA) reported earnings 30 days ago. What's next for the stock? We take a look at earnings estimates for some clues.

    Zacks Equity Research

    Celgene Presents Data on CAR T Therapy, Revlimid & Pomalyst

    Biotech major Celgene presents encouraging data on its oncology drugs Revlimid, Pomalyst along with other experimental therapies at the ASCO.

      Zacks Equity Research

      Implied Volatility Surging for Prothena (PRTA) Stock Options

      Prothena (PRTA) needs investors to pay close attention to the stock based on moves in the options market lately.

        Zacks Equity Research

        Prothena Restructures Resources, to Cut Workforce by 57%

        Prothena announces a reduction in workforce by 57%, due to the discontinuation of lead program, NEOD001.

          Zacks Equity Research

          Prothena (PRTA) Q1 Loss Wider Than Expected, Sales Miss

          Prothena's (PRTA) wider-than-expected loss in the first quarter was disappointing. Sales also missed estimates by a huge margin.

            Zacks Equity Research

            Celgene (CELG) Q1 Earnings & Sales Beat on Revlimid Strength

            Celgene (CELG) surpasses both earnings and sales estimates in the first quarter on the back of impressive performance from Pomalyst and Otezla.

              Zacks Equity Research

              What's in Store for Prothena (PRTA) This Earnings Season?

              Prothena (PRTA) has faced quite a few setbacks in the year so far and hence investors will be focused on management's strategy when it reports first-quarter results next week.

                Zacks Equity Research

                Implied Volatility Surging for Prothena (PRTA) Stock Options

                Prothena (PRTA) needs investors to pay close attention to the stock based on moves in the options market lately.

                  Zacks Equity Research

                  Acorda Files Parkinson's Drug Marketing Application in EU

                  Acorda Therapeutics (ACOR) is seeking approval of its Parkinson's disease candidate, Inbrija, in Europe for the treatment of symptoms of OFF periods.

                    Zacks Equity Research

                    Prothena Rallies on Multi-Year Collaboration With Celgene

                    Shares of Prothena (PRTA) surged significantly after the company announced a multi-year collaboration with leading company Celgene to develop new therapies for a broad range of neurodegenerative diseases.

                      Zacks Equity Research

                      Options Traders Expect Huge Moves in Prothena (PRTA) Stock

                      Investors in Prothena (PRTA) need to pay close attention to the stock based on moves in the options market lately.

                        Zacks Equity Research

                        Prothena (PRTA) Up 8.7% Since Earnings Report: Can It Continue?

                        Prothena (PRTA) reported earnings 30 days ago. What's next for the stock? We take a look at earnings estimates for some clues.

                          Zacks Equity Research

                          FDA Accepts Acorda's NDA for Parkinson's Disease Candidate

                          FDA accepts Acorda's (ACOR) new drug application (NDA) for its parkinson's disease candidate, Inbrija and it also set an action date of Oct 5, 2018.

                            Zacks Equity Research

                            Prothena's (PRTA) Loss Narrows in Q4, Pipeline Progresses

                            Prothena (PRTA) reported a narrower-than-expected loss in the fourth quarter as the company continued with its pipeline progress.

                              Zacks Equity Research

                              Will Prothena (PRTA) Disappoint Investors in Q4 Earnings?

                              Although Prothena's (PRTA) track record is good, the company is unlikely to beat estimates in the current quarter given the unfavorable rank and Earnings ESP.

                                Zacks Equity Research

                                Prothena (PRTA) Tumbles 18% in a Year: What Lies Ahead?

                                Prothena's (PRTA) stock tumbles more than 18% due to a pipeline setback. The company depends heavily on the success of its two candidates.

                                  Zacks Equity Research

                                  Acorda Resubmits NDA for Parkinson's Disease Candidate Inbrija

                                  Acorda (ACOR) resubmits new drug application for its late stage pipeline candidate, Inbrija to the FDA.

                                    Zacks Equity Research

                                    Acorda Stock Up Despite Phase III Trial on Tozadenant Stops

                                    Acorda (ACOR) decides to suspend the phase III study on tozadenant based on new data obtained from the trial, spotting comprise with patient's safety.

                                      Zacks Equity Research

                                      Acorda Reports Death in Parkinson's Trials, Stock Down 40%

                                      Acorda's (ACOR) shares slump significantly after the company complains of safety issues related to a late-stage study on tozadenant, a lead Parkinson's disease candidate.

                                        Zacks Equity Research

                                        Prothena (PRTA) Earnings Beat in Q3, Pipeline in Focus

                                        Prothena (PRTA) reported a narrower-than-expected loss in the third quarter as the company continued with its pipeline progress.

                                          Zacks Equity Research

                                          What's in the Cards for Prothena (PRTA) in Q3 Earnings?

                                          Investors focus should remain on pipeline updates when Prothena Corporation (PRTA) reports third-quarter results as it has no approved product in its portfolio.

                                            Zacks Equity Research

                                            Prothena's Psoriasis Candidate Disappoints in Phase I Study

                                            Prothena Corporation plc (PRTA) announced disappointing results from a phase Ib study of pipeline candidate, PRX003 in psoriasis patients.

                                              Zacks Equity Research

                                              AstraZeneca and Takeda Ink Deal to Develop Parkinson's Drug

                                              AstraZeneca (AZN) and Takeda Pharmaceutical Company entered into an agreement to jointly develop and commercialize MEDI1341 for the potential treatment of Parkinson's disease.

                                                Zacks Equity Research

                                                Prothena (PRTA) Q2 Loss Narrows as Roche Makes $30M Payment

                                                Prothena Corporation plc (PRTA) reported a narrower-than-expected loss in the second quarter as the company received a milestone payment from Roche.

                                                  Zacks Equity Research

                                                  Should You Buy Prothena Corporation PLC (PRTA) Ahead of Earnings?

                                                  Given that Prothena Corporation PLC (PRTA) has a Zacks Rank #3 (Hold) and an ESP in positive territory, investors might want to consider this stock ahead of earnings.