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Prothena (PRTA)

(Delayed Data from NSDQ)

$9.42 USD

9.42
363,713

+0.03 (0.32%)

Updated Aug 25, 2026 04:00 PM ET

After-Market: $9.42 0.00 (0.00%) 7:58 PM 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 Buy23.80%
2Buy18.13%
3Hold10.19%
4Sell5.73%
5Strong Sell3.17%
S&P50011.53%

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

F Value B Growth F Momentum D 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 35% (159 out of 246)

Industry: Medical - Biomedical and Genetics

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Zacks News

Zacks Equity Research

The Zacks Analyst Blog Highlights Biogen, Eli Lilly's, Prothena and AC Immune (Revised)

by Zacks Equity Research

Biogen, Eli Lilly's, Prothena and AC Immune are included in this Analyst Blog.

Zacks Equity Research

Alzheimer's in Focus as FDA Panel Endorses Lilly's Donanemab (Revised)

by Zacks Equity Research

If Eli Lilly's (LLY) donanemab is approved by the FDA, it will become the second drug approved by the FDA to reduce the clinical decline associated with Alzheimer's disease.

Zacks Equity Research

The Zacks Analyst Blog Highlights Biogen, Eli Lilly's, Prothena and AC Immune

by Zacks Equity Research

Biogen, Eli Lilly's, Prothena and AC Immune are included in this Analyst Blog.

Kinjel Shah headshot

Alzheimer's in Focus as FDA Panel Endorses Lilly's Donanemab

by Kinjel Shah

If Eli Lilly's (LLY) donanemab is approved by the FDA, it will become the second drug approved by the FDA to reduce the clinical decline associated with Alzheimer's disease.

Zacks Equity Research

Eli Lilly (LLY) Alzheimer's Drug Donanemab Gets FDA Panel Nod

by Zacks Equity Research

Eli Lilly (LLY) Alzheimer's disease drug, donanemab, receives Peripheral and Central Nervous System Drugs Advisory Committee (PCNS) recommendation.

Zacks Equity Research

Biogen (BIIB) & Eisai's Leqembi sBLA Gets FDA Acceptance

by Zacks Equity Research

FDA accepts Biogen's (BIIB) partner Eisai's sBLA for a maintenance intravenous dosing version of Alzheimer's drug Leqembi. The final FDA decision is expected on Jan 25, 2025.

Zacks Equity Research

Why Is Prothena (PRTA) Down 1.5% Since Last Earnings Report?

by Zacks Equity Research

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

Prothena (PRTA), Bristol Myers Tie Up for Second Neuro Candidate

by Zacks Equity Research

Prothena (PRTA) announces that Bristol Myers is exercising its option for the second time, thereby in-licensing exclusive global rights for PRX019 to potentially treat neurodegenerative diseases.

Zacks Equity Research

Prothena (PRTA) Q1 Earnings Miss Estimates on Higher R&D Expenses

by Zacks Equity Research

Prothena (PRTA) posts a wider-than-expected loss in the first quarter on lower revenues and higher costs.

Zacks Equity Research

Prothena (PRTA) Reports Q1 Loss, Lags Revenue Estimates

by Zacks Equity Research

Prothena (PRTA) delivered earnings and revenue surprises of -10.74% and 98.67%, respectively, for the quarter ended March 2024. Do the numbers hold clues to what lies ahead for the stock?