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Prothena (PRTA)

(Delayed Data from NSDQ)

$9.25 USD

9.25
285,793

-0.17 (-1.80%)

Updated Aug 26, 2026 04:00 PM ET

After-Market: $9.26 +0.01 (0.11%) 5:14 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%

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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%.

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

Bottom 36% (157 out of 247)

Industry: Medical - Biomedical and Genetics

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Zacks News

Zacks Equity Research

Prothena (PRTA) Reports Q1 Loss, Lags Revenue Estimates

by Zacks Equity Research

Prothena (PRTA) delivered earnings and revenue surprises of -7.23% and 85.51%, respectively, for the quarter ended March 2023. Do the numbers hold clues to what lies ahead for the stock?

Zacks Equity Research

Analysts Estimate Prothena (PRTA) to Report a Decline in Earnings: What to Look Out for

by Zacks Equity Research

Prothena (PRTA) doesn't possess the right combination of the two key ingredients for a likely earnings beat in its upcoming report. Get prepared with the key expectations.

Zacks Equity Research

Prothena (PRTA) Gains 29% in One Year: Will the Momentum Continue?

by Zacks Equity Research

Prothena (PRTA) surges 29% in the past one year as investors are optimistic on its promising Alzheimer's Disease pipeline.

Zacks Equity Research

Prothena (PRTA) Q4 Earnings and Revenues Beat Estimates

by Zacks Equity Research

Prothena (PRTA) reports better-than-expected results for the fourth quarter. The company makes considerable pipeline progress.

Zacks Equity Research

Prothena (PRTA) Stock Gains 88.5% in 6 Months: What Lies Ahead?

by Zacks Equity Research

Prothena (PRTA) surges 88% in the last six months as investors are optimistic on its promising Alzheimer???s Disease pipeline.

Zacks Equity Research

Biogen (BIIB) Down on Report of Death in Alzheimer's Study

by Zacks Equity Research

Investor confidence in Biogen (BIIB) is rattled following reports of a study participant's death who was administered its Alzheimer's disease (AD) antibody in clinical studies.

Zacks Equity Research

Prothena (PRTA) Earns Milestone Payment From Novo Nordisk

by Zacks Equity Research

Prothena (PRTA) earns a $40 million milestone payment from Novo Nordisk following the progress of NNC6019 in a phase II study for the treatment of ATTR cardiomyopathy.

Zacks Equity Research

Prothena's (PRTA) Q3 Earnings Miss, Revenues Decline Y/Y

by Zacks Equity Research

Prothena (PRTA) incurs a loss in the third quarter while revenues miss estimates.

Zacks Equity Research

Prothena (PRTA) Reports Q3 Loss, Lags Revenue Estimates

by Zacks Equity Research

Prothena (PRTA) delivered earnings and revenue surprises of -212.90% and 94.33%, respectively, for the quarter ended September 2022. Do the numbers hold clues to what lies ahead for the stock?

Zacks Equity Research

Annovis (ANVS) Gains on FDA Authorization for AD Study

by Zacks Equity Research

Annovis (ANVS) shares jump following the FDA's authorization to proceed with the phase II/III clinical study of lead candidate buntanetap in moderate Alzheimer's Disease (AD).