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Compare stocks with our powerful stock comparison tool. Analyze fundamentals, price performance, and key financial indicators to make informed investment decisions. Our tool lets you compare up to ten stocks side by side based on Performance Charts, Price & Volume, MarketRank™, Analyst Ratings, Sales & Book Value, Profitability & Earnings, Dividends, Debt, Ownership, Headlines, and more. Simply enter up to ten stock symbols (e.g., BAC, JPM, WFC, C, GS) to get started and uncover top investment opportunities.

CompanyCurrent Price50-Day Moving Average52-Week RangeMarket CapBetaAvg. VolumeToday's Volume
AC Immune stock logo
ACIU
AC Immune
$2.06
+2.0%
$1.82
$1.43
$4.26
$207.85M1.62144,985 shs113,290 shs
Assembly Biosciences, Inc. stock logo
ASMB
Assembly Biosciences
$18.15
-0.8%
$14.99
$7.75
$19.93
$138.55M0.6227,602 shs15,693 shs
CytoDyn Inc. stock logo
CYDY
CytoDyn
$0.29
+5.6%
$0.34
$0.10
$0.49
$356.69M1.171.38 million shs413,710 shs
Milestone Pharmaceuticals Inc. stock logo
MIST
Milestone Pharmaceuticals
$1.93
+0.7%
$1.56
$0.63
$2.75
$103.72M0.96955,072 shs237,742 shs
Prothena Corporation plc stock logo
PRTA
Prothena
$6.47
+2.4%
$6.40
$4.32
$25.42
$346.38M0.01798,449 shs636,811 shs
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Compare Price Performance

Company1-Day Performance7-Day Performance30-Day Performance90-Day Performance1-Year Performance
AC Immune stock logo
ACIU
AC Immune
0.00%+2.49%+19.08%+24.10%-45.93%
Assembly Biosciences, Inc. stock logo
ASMB
Assembly Biosciences
0.00%+4.85%+14.80%+108.38%+49.38%
CytoDyn Inc. stock logo
CYDY
CytoDyn
0.00%+10.68%-16.54%+35.07%+109.87%
Milestone Pharmaceuticals Inc. stock logo
MIST
Milestone Pharmaceuticals
0.00%+3.98%+11.15%+177.99%+45.96%
Prothena Corporation plc stock logo
PRTA
Prothena
0.00%+6.41%+27.87%-40.42%-67.76%
CompanyOverall ScoreAnalyst's OpinionShort Interest ScoreDividend StrengthESG ScoreNews and Social Media SentimentCompany OwnershipEarnings & Valuation
AC Immune stock logo
ACIU
AC Immune
2.4456 of 5 stars
3.53.00.00.02.00.80.6
Assembly Biosciences, Inc. stock logo
ASMB
Assembly Biosciences
3.6613 of 5 stars
3.33.00.04.71.70.00.0
CytoDyn Inc. stock logo
CYDY
CytoDyn
N/AN/AN/AN/AN/AN/AN/AN/A
Milestone Pharmaceuticals Inc. stock logo
MIST
Milestone Pharmaceuticals
2.2979 of 5 stars
3.25.00.00.00.02.50.0
Prothena Corporation plc stock logo
PRTA
Prothena
3.0729 of 5 stars
4.22.00.00.01.11.71.3
CompanyConsensus Rating ScoreConsensus RatingConsensus Price Target% Upside from Current Price
AC Immune stock logo
ACIU
AC Immune
3.00
Buy$12.00482.52% Upside
Assembly Biosciences, Inc. stock logo
ASMB
Assembly Biosciences
2.67
Moderate Buy$33.0081.82% Upside
CytoDyn Inc. stock logo
CYDY
CytoDyn
0.00
N/AN/AN/A
Milestone Pharmaceuticals Inc. stock logo
MIST
Milestone Pharmaceuticals
2.40
Hold$7.00261.94% Upside
Prothena Corporation plc stock logo
PRTA
Prothena
2.33
Hold$31.50386.86% Upside

Current Analyst Ratings Breakdown

Latest ACIU, MIST, ASMB, CYDY, and PRTA Analyst Ratings

DateCompanyBrokerageActionRatingPrice TargetDetails
6/20/2025
Prothena Corporation plc stock logo
PRTA
Prothena
Cantor Fitzgerald
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Reiterated RatingNeutral ➝ Neutral
6/5/2025
Milestone Pharmaceuticals Inc. stock logo
MIST
Milestone Pharmaceuticals
HC Wainwright
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UpgradeBuy$5.00
5/28/2025
Prothena Corporation plc stock logo
PRTA
Prothena
Bank of America
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Reiterated RatingNeutral ➝ Underperform
5/27/2025
Prothena Corporation plc stock logo
PRTA
Prothena
Piper Sandler
Subscribe to MarketBeat All Access for the recommendation accuracy rating
Lower Price TargetOverweight ➝ Overweight$110.00 ➝ $81.00
5/27/2025
Prothena Corporation plc stock logo
PRTA
Prothena
JMP Securities
Subscribe to MarketBeat All Access for the recommendation accuracy rating
Lower Price TargetMarket Outperform ➝ Market Outperform$78.00 ➝ $29.00
5/27/2025
Prothena Corporation plc stock logo
PRTA
Prothena
Cantor Fitzgerald
Subscribe to MarketBeat All Access for the recommendation accuracy rating
DowngradeOverweight ➝ Neutral
5/27/2025
Prothena Corporation plc stock logo
PRTA
Prothena
Jefferies Financial Group
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DowngradeBuy ➝ Hold$6.00
5/27/2025
Prothena Corporation plc stock logo
PRTA
Prothena
Oppenheimer
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DowngradeOutperform ➝ Market Perform
5/27/2025
Prothena Corporation plc stock logo
PRTA
Prothena
HC Wainwright
Subscribe to MarketBeat All Access for the recommendation accuracy rating
Lower Price TargetBuy ➝ Buy$30.00 ➝ $14.00
5/27/2025
Prothena Corporation plc stock logo
PRTA
Prothena
Chardan Capital
Subscribe to MarketBeat All Access for the recommendation accuracy rating
Lower Price TargetBuy ➝ Buy$40.00 ➝ $18.00
5/13/2025
Prothena Corporation plc stock logo
PRTA
Prothena
Cantor Fitzgerald
Subscribe to MarketBeat All Access for the recommendation accuracy rating
UpgradeStrong-Buy
(Data available from 7/6/2022 forward. View 10+ years of historical ratings with our analyst ratings screener.)
CompanyAnnual RevenuePrice/SalesCashflowPrice/CashBook ValuePrice/Book
AC Immune stock logo
ACIU
AC Immune
$28.30M7.31N/AN/A$1.29 per share1.60
Assembly Biosciences, Inc. stock logo
ASMB
Assembly Biosciences
$28.52M4.86N/AN/A$5.25 per share3.46
CytoDyn Inc. stock logo
CYDY
CytoDyn
N/AN/AN/AN/A($0.11) per shareN/A
Milestone Pharmaceuticals Inc. stock logo
MIST
Milestone Pharmaceuticals
$1M103.39N/AN/A$0.25 per share7.74
Prothena Corporation plc stock logo
PRTA
Prothena
$135.16M2.58N/AN/A$9.05 per share0.71
CompanyNet IncomeEPSTrailing P/E RatioForward P/E RatioP/E GrowthNet MarginsReturn on Equity (ROE)Return on Assets (ROA)Next Earnings Date
AC Immune stock logo
ACIU
AC Immune
-$57.83M-$0.58N/AN/AN/A-177.79%-44.60%-22.25%8/5/2025 (Estimated)
Assembly Biosciences, Inc. stock logo
ASMB
Assembly Biosciences
-$40.18M-$6.23N/AN/AN/A-124.15%-131.77%-36.81%8/6/2025 (Estimated)
CytoDyn Inc. stock logo
CYDY
CytoDyn
-$49.84MN/A0.00N/AN/AN/A-33.26%8/14/2025 (Estimated)
Milestone Pharmaceuticals Inc. stock logo
MIST
Milestone Pharmaceuticals
-$41.52M-$0.78N/AN/AN/AN/A-329.85%-67.20%8/6/2025 (Estimated)
Prothena Corporation plc stock logo
PRTA
Prothena
-$122.31M-$2.08N/AN/AN/A-79.94%-21.61%-19.32%8/6/2025 (Estimated)

Latest ACIU, MIST, ASMB, CYDY, and PRTA Earnings

DateQuarterCompanyConsensus EstimateReported EPSBeat/MissGap EPSRevenue EstimateActual RevenueDetails
5/14/2025Q1 2025
Milestone Pharmaceuticals Inc. stock logo
MIST
Milestone Pharmaceuticals
-$0.19-$0.31-$0.12-$0.31N/AN/A
5/8/2025Q1 2025
Assembly Biosciences, Inc. stock logo
ASMB
Assembly Biosciences
-$2.01-$1.17+$0.84-$1.17$7.41 million$9.42 million
5/8/2025Q1 2025
Prothena Corporation plc stock logo
PRTA
Prothena
-$0.92-$1.12-$0.20-$1.12$8.18 million$2.83 million
4/30/2025Q1 2025
AC Immune stock logo
ACIU
AC Immune
-$0.22-$0.21+$0.01-$0.21$1.99 million$1.12 million
CompanyAnnual PayoutDividend Yield3-Year Dividend GrowthPayout RatioYears of Consecutive Growth
AC Immune stock logo
ACIU
AC Immune
N/AN/AN/AN/AN/A
Assembly Biosciences, Inc. stock logo
ASMB
Assembly Biosciences
N/AN/AN/AN/AN/A
CytoDyn Inc. stock logo
CYDY
CytoDyn
N/AN/AN/AN/AN/A
Milestone Pharmaceuticals Inc. stock logo
MIST
Milestone Pharmaceuticals
N/AN/AN/AN/AN/A
Prothena Corporation plc stock logo
PRTA
Prothena
N/AN/AN/AN/AN/A
CompanyDebt-to-Equity RatioCurrent RatioQuick Ratio
AC Immune stock logo
ACIU
AC Immune
N/A
1.53
1.53
Assembly Biosciences, Inc. stock logo
ASMB
Assembly Biosciences
N/A
2.05
2.05
CytoDyn Inc. stock logo
CYDY
CytoDyn
N/A
0.30
0.30
Milestone Pharmaceuticals Inc. stock logo
MIST
Milestone Pharmaceuticals
4.06
4.67
4.67
Prothena Corporation plc stock logo
PRTA
Prothena
N/A
9.00
9.00

Institutional Ownership

CompanyInstitutional Ownership
AC Immune stock logo
ACIU
AC Immune
51.36%
Assembly Biosciences, Inc. stock logo
ASMB
Assembly Biosciences
19.92%
CytoDyn Inc. stock logo
CYDY
CytoDyn
5.06%
Milestone Pharmaceuticals Inc. stock logo
MIST
Milestone Pharmaceuticals
86.18%
Prothena Corporation plc stock logo
PRTA
Prothena
97.08%

Insider Ownership

CompanyInsider Ownership
AC Immune stock logo
ACIU
AC Immune
4.60%
Assembly Biosciences, Inc. stock logo
ASMB
Assembly Biosciences
5.30%
CytoDyn Inc. stock logo
CYDY
CytoDyn
0.54%
Milestone Pharmaceuticals Inc. stock logo
MIST
Milestone Pharmaceuticals
19.50%
Prothena Corporation plc stock logo
PRTA
Prothena
9.20%
CompanyEmployeesShares OutstandingFree FloatOptionable
AC Immune stock logo
ACIU
AC Immune
140100.41 million95.79 millionOptionable
Assembly Biosciences, Inc. stock logo
ASMB
Assembly Biosciences
1007.64 million7.23 millionOptionable
CytoDyn Inc. stock logo
CYDY
CytoDyn
201.25 billion1.24 billionNot Optionable
Milestone Pharmaceuticals Inc. stock logo
MIST
Milestone Pharmaceuticals
3053.46 million43.04 millionOptionable
Prothena Corporation plc stock logo
PRTA
Prothena
13053.83 million48.88 millionOptionable

Recent News About These Companies

Prothena Announces Corporate Restructuring
PRTA Prothena Corporation plc

New MarketBeat Followers Over Time

Media Sentiment Over Time

AC Immune stock logo

AC Immune NASDAQ:ACIU

$2.06 +0.04 (+1.98%)
Closing price 07/3/2025 02:31 PM Eastern
Extended Trading
$2.06 0.00 (0.00%)
As of 07/3/2025 04:51 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Polygon.io. Learn more.

AC Immune SA, a clinical stage biopharmaceutical company, discovers, designs, and develops medicines and diagnostic products for the prevention and treatment of neurodegenerative diseases associated with protein misfolding. Its SupraAntigen and Morphomer platforms are designed to generate vaccines, antibodies, and small molecules, which selectively interact with misfolded proteins that are common in a range of neurodegenerative diseases. The company is developing Crenezumab, a humanized, conformation-specific monoclonal antibody, which is in Phase II clinical studies trial for the treatment of Alzheimer's disease (AD). It is also developing ACI-24, an anti-Abeta vaccine candidate that is in Phase II clinical study for AD, as well as completed Phase Ib clinical study for Down syndrome; ACI-35, an anti-Tau vaccine candidate that is in Phase Ib/2a clinical study; and Tau- positron emission tomography (PET) imaging tracer, which is in Phase II clinical study. In addition, the company is researching and developing small molecule Tau aggregation inhibitors for AD and NeuroOrphan indications. Further, it has discovery and preclinical stage molecules targeting range of neurodegenerative diseases, which include diagnostics targeting TDP-43, alpha-synuclein, and NLRP3. AC Immune SA has license agreements and collaborations with Genentech, Inc.; Biogen International GmbH; Janssen Pharmaceuticals, Inc.; Life Molecular Imaging SA; Eli Lilly and Company; and WuXi Biologics. The company was incorporated in 2003 and is headquartered in Lausanne, Switzerland.

Assembly Biosciences stock logo

Assembly Biosciences NASDAQ:ASMB

$18.15 -0.15 (-0.82%)
As of 07/3/2025 01:04 PM Eastern
This is a fair market value price provided by Polygon.io. Learn more.

Assembly Biosciences, Inc., a biotechnology company, develops therapeutic candidates for the treatment of viral diseases. It develops ABI-5366, a long-acting herpes simplex virus (HSV) helicase-primase inhibitor that is in Phase 1a/1b clinical trial to treat recurrent genital herpes; ABI-1179, which is in Phase 1a/1b clinical trial for the treatment of recurrent genital herpes; and ABI-6250, a small molecule orally bioavailable hepatitis delta virus entry inhibitor that is in Phase 1a clinical trial. The company also develops ABI-4334, a next-generation capsid assembly modulator, which is in Phase 1b clinical trial for the treatment of hepatitis B virus (HBV). In addition, it develops an oral non-nucleoside polymerase inhibitor targeting transplant-related herpesviruses; and a small molecule interferon-a receptor agonist targeting HBV and HDV. The company has collaboration agreements with Gilead Sciences, Inc. and BeiGene, Ltd. The company was formerly known as Ventrus Biosciences, Inc. and changed its name to Assembly Biosciences, Inc. in June 2014. Assembly Biosciences, Inc. was incorporated in 2005 and is headquartered in South San Francisco, California.

CytoDyn stock logo

CytoDyn OTCMKTS:CYDY

$0.29 +0.02 (+5.56%)
As of 07/3/2025 12:59 PM Eastern

CytoDyn Inc., a clinical-stage biotechnology company, engages in the development of treatments for multiple therapeutic indications. The company is involved in the clinical development of leronlimab, a novel humanized monoclonal antibody targeting the C-C chemokine receptor type 5 receptor in the areas of COVID-19, human immunodeficiency virus (HIV), Metabolic dysfunction-associated steatohepatitis (MASH), and solid tumors in oncology, such as metastatic triple-negative breast cancer. Its leronlimab is currently under phase 2 development for the treatment of NASH, HIV- NASH, and solid tumors, as well as under pre-clinical development for the treatment of HIV-PrEP and HIV-Cure. The company was formerly known as RexRay Corporation. CytoDyn Inc. was incorporated in 2002 and is based in Vancouver, Washington.

Milestone Pharmaceuticals stock logo

Milestone Pharmaceuticals NASDAQ:MIST

$1.93 +0.01 (+0.73%)
Closing price 07/3/2025 03:59 PM Eastern
Extended Trading
$1.92 -0.01 (-0.72%)
As of 07/3/2025 04:43 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Polygon.io. Learn more.

Milestone Pharmaceuticals Inc., a biopharmaceutical company, focuses on the development and commercialization of cardiovascular medicines. The company's lead product candidate is etripamil, a novel and potent calcium channel blocker, which is in Phase III clinical trial for the treatment of paroxysmal supraventricular tachycardia in the United States and Canada; and Phase II clinical trial for the treatment of atrial fibrillation and rapid ventricular rate. It has a license and collaboration agreement with Ji Xing Pharmaceuticals to develop and commercialize etripamil prophylactic and therapeutic uses in humans, as well as with the Montreal Heart Institute, the WCN network, and other research centers. The company was incorporated in 2003 and is headquartered in Montréal, Canada.

Prothena stock logo

Prothena NASDAQ:PRTA

$6.47 +0.15 (+2.37%)
Closing price 07/3/2025 03:46 PM Eastern
Extended Trading
$6.41 -0.06 (-0.94%)
As of 07/3/2025 04:52 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Polygon.io. Learn more.

Prothena Corporation plc, a late-stage clinical biotechnology company, focuses on discovery and development of novel therapies to treat diseases caused by protein dysregulation in the United States. The company is involved in developing birtamimab, an investigational humanized antibody that is in Phase III clinical trial for the treatment of AL amyloidosis; Prasinezumab, a humanized monoclonal antibody, for the treatment of Parkinson's disease and other related synucleinopathies which is in Phase IIb clinical trial; NNC6019 that is in Phase lI clinical trial for the treatment of ATTR amyloidosis; and BMS-986446 and PRX012, which is in Phase I clinical trial for the treatment of Alzheimer's disease. Its discovery and preclinical programs include PRX123, a dual Aß-Tau vaccine for the treatment and prevention of Alzheimer's disease; and PRX019 for the treatment of neurogenerative diseases, as well as TDP-43 for the treatment of amyotrophic lateral sclerosis. Prothena Corporation plc has a license, development, and commercialization agreement with F. Hoffmann-La Roche Ltd. and Hoffmann-La Roche Inc. to develop and commercialize antibodies that target a-synuclein, including prasinezumab; and a collaboration agreement with Bristol-Myers Squibb to develop and commercialize antibodies targeting tau, TDP-43. The company was incorporated in 2012 and is based in Dublin, Ireland.