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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%

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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

Prothena (PRTA) Q2 Earnings and Revenues Miss Estimates

by Zacks Equity Research

Prothena (PRTA) reports a wider-than-expected loss in the second quarter. The company makes considerable pipeline progress and updates 2023 bottom-line guidance.

Zacks Equity Research

Prothena (PRTA) Reports Q2 Loss, Lags Revenue Estimates

by Zacks Equity Research

Prothena (PRTA) delivered earnings and revenue surprises of -11.96% and 62%, respectively, for the quarter ended June 2023. Do the numbers hold clues to what lies ahead for the stock?

Zacks Equity Research

Lilly's (LLY) Donanemab Slows Alzheimer's Disease Progression

by Zacks Equity Research

Data from a phase III study shows that treatment with Eli Lilly's (LLY) donanemab slowed cognitive and functional decline by 60% in study participants at the earliest stage of Alzheimer's disease.

Zacks Equity Research

Biotech Stock Roundup: BIIB, Eisai's Drug Update, NVAX Gains on Deal Amendment

by Zacks Equity Research

Regulatory and key pipeline updates from Biogen (BIIB) and Novavax (NVAX) are in focus in the biotech sector.

Zacks Equity Research

Prothena (PRTA) Alzheimer's Disease Drug Licensed by BMY

by Zacks Equity Research

Prothena (PRTA) will receive $55 million from Bristol Myers Squibb for an exclusive worldwide license to PRX005, designed for the potential treatment of Alzheimer's disease.

Zacks Equity Research

Biogen (BIIB), Eisai Get Full FDA Nod for Leqembi in Alzheimer's

by Zacks Equity Research

Following the full approval, Biogen (BIIB)/Eisai's Leqembi is the first approved treatment to slow progression of Alzheimer's disease. This also paves the way for a broader Medicare coverage.

Zacks Equity Research

Biogen (BIIB), Eisai Alzheimer Drug Gets FDA Panel Endorsement

by Zacks Equity Research

An FDA advisory committee supports granting full approval to Biogen (BIIB)/Eisai's Alzheimer's disease antibody. NASDAQ halts BIIB's common stock trading on Jun 9.

Zacks Equity Research

Biogen (BIIB), Eisai's Alzheimer Drug Likely to Get Full FDA Nod

by Zacks Equity Research

Based on briefing documents issued by the FDA, a full regulatory approval is expected on Biogen (BIIB)/Eisai's Alzheimer's disease antibody. The final decision is expected in the early next month.

Zacks Equity Research

Cassava (SAVA) Up on Progress With Alzheimers Disease Study

by Zacks Equity Research

Cassava (SAVA) made positive progress with simufilam, an oral drug treatment for Alzheimer's disease dementia. The company's shares gain in the last month.

Zacks Equity Research

Prothena (PRTA) Q1 Earnings and Revenues Miss Estimates

by Zacks Equity Research

Prothena (PRTA) reports a wider loss in the first quarter. The company makes considerable pipeline progress.