Arena Pharmaceuticals, Inc. (ARNA) Stock Analysis
Educational signal · not a buy or sell recommendation · How to read this
DELISTED
What happened to Arena Pharmaceuticals, Inc. (ARNA) stock?
Arena Pharmaceuticals, Inc. (ARNA) no longer trades on public markets. The figures below are historical and are not a current quote.
Beta 0.55: the stock has moved about 45% less than the S&P 500.
For informational purposes only. Not financial advice. Machine-generated analysis by Stock Expert AI — model gpt-4o-mini, generated May 10, 2026. Editorial oversight is systemic, not page-by-page. Editorially accountable: Sedat ANAK, Founder and Editor-in-Chief. Data sources: Financial Modeling Prep, Yahoo Finance, SEC EDGAR
Arena Pharmaceuticals, Inc. (ARNA). Arena Pharmaceuticals, Inc. is a biopharmaceutical company focused on developing innovative medicines for various diseases. Acquired by Pfizer in 2022, it is advancing multiple clinical programs across therapeutic areas. Sector: Healthcare.
Last analyzed: May 10, 2026Analyst Coverage for ARNA: ARNA does not currently have published analyst price targets in our coverage universe. This is common for smaller-cap names with limited Wall Street coverage. In the absence of analyst consensus, our AI model evaluates ARNA against Healthcare peers across nine fundamental dimensions and assigns a neutral fundamental signal based on the underlying data.
ARNA: the 2 scored disciplines are evenly split. Dominant signal: Seth Klarman bullish.
How is this calculated? →AI simulations built from the named investors' published principles. Not affiliated with, endorsed by, or the opinion of these individuals. How these lenses are built
Arena Pharmaceuticals, Inc. (ARNA) Healthcare & Pipeline Overview
Arena Pharmaceuticals, Inc. is a biopharmaceutical company dedicated to developing novel therapeutics with a strong focus on pharmacology and pharmacokinetics, positioning itself as a key player in the biotechnology sector with a diverse clinical pipeline.
What Is the Investment Thesis for ARNA?
The company is currently advancing Etrasimod through multiple Phase III trials, with potential market entries in ulcerative colitis and atopic dermatitis expected in the coming years. Additionally, the ongoing development of Olorinab and APD418 could further enhance revenue streams, as these therapies target significant market opportunities in irritable bowel syndrome and acute heart failure, respectively. The acquisition by Pfizer provides Arena with enhanced financial stability and operational support, potentially accelerating its growth trajectory. However, investors should remain cautious of the inherent risks associated with drug development, including regulatory hurdles and market competition.
Based on FMP financials and quantitative analysis
ARNA Key Highlights
Gross margin of 100.0% reflects the company's focus on high-value biopharmaceutical products.
- Profit margin of -1149244.4% indicates significant investment in R&D and operational costs.
- Beta of 0.55 suggests lower volatility compared to the broader market.
- No dividend yield as the company reinvests earnings into clinical development.
- Employee count of 448 demonstrates a dedicated workforce focused on innovation.
Who Are ARNA's Competitors?
ARNA is benchmarked below against 8 industry peers on price, market cap, and our AI MoonshotScore.
| Company | Price | Change | Market Cap | MoonshotScore |
|---|---|---|---|---|
| ROIV Roivant Sciences Ltd. | $40.66 | -0.68% | $29.4B | — |
| RCM R1 RCM Inc. | $14.31 | 0.00% | $6.04B | — |
| ISEE IVERIC bio, Inc. | $39.95 | +0.38% | $5.51B | — |
| MRTX Mirati Therapeutics, Inc. | $58.70 | -0.17% | $4.12B | — |
| NVO Novo Nordisk A/S | $44.01 | -1.23% | $195B | 925-pillar |
| VRTX Vertex Pharmaceuticals Incorporated | $514.90 | +0.07% | $131B | 965-pillar |
| REGN Regeneron Pharmaceuticals, Inc. | $793.26 | -1.78% | $81.7B | 945-pillar |
| ARGX argenx SE | $984.04 | -1.82% | $61.2B | 975-pillar |
AI Score by Stock Expert AI · Price data: FMP / Yahoo Finance
What Are ARNA's Key Strengths?
Robust pipeline with multiple candidates in advanced clinical stages.
- Strong collaboration with Pfizer providing financial and operational support.
- High gross margin potential due to focus on innovative therapies.
What Are ARNA's Weaknesses?
Negative profit margin indicating high R&D expenditures.
- Dependence on successful clinical trial outcomes for revenue generation.
- Limited product portfolio until candidates receive regulatory approval.
What Could Drive ARNA Stock Higher?
Potential market approval for Etrasimod in ulcerative colitis and atopic dermatitis expected in 2026.
- Phase II trials for Olorinab and APD418, with data readouts anticipated in the near future.
- Strategic collaborations with Pfizer and other partners enhancing research capabilities.
What Are the Key Risks for ARNA?
Negative return on equity (-70.8%) — the business is not currently generating profit on shareholder capital.
- Insider selling — insiders were net sellers of roughly $2.6M recently.
- Regulatory challenges could delay the approval of key drug candidates.
- High R&D costs may impact profitability in the short term.
- Competitive pressures from other biotechnology firms may affect market share.
What Are the Growth Opportunities for ARNA?
- Expansion of Etrasimod: Etrasimod is currently in multiple Phase III trials for ulcerative colitis and atopic dermatitis, with potential market approval expected in 2026. The global ulcerative colitis market is projected to reach $8.4 billion by 2027, presenting a significant revenue opportunity for Arena as it seeks to capture market share with this innovative therapy.
- Development of Olorinab: Olorinab is in Phase IIb trials for abdominal pain associated with irritable bowel syndrome, a condition affecting approximately 10-15% of the global population. Successful trial outcomes could position Arena favorably within this lucrative segment.
- Advancements in APD418: The Phase II clinical trial for APD418, targeting acute heart failure, aims to address a critical unmet need in a market projected to exceed $20 billion by 2026. If successful, this therapy could significantly enhance Arena's portfolio and revenue potential.
- Collaboration with Pfizer: As a subsidiary of Pfizer, Arena benefits from enhanced resources and expertise, facilitating accelerated development timelines and increased market access for its therapeutic candidates. This partnership may lead to strategic collaborations that further expand its pipeline.
- Market for Pulmonary Arterial Hypertension: Ralinepag (APD811) is in Phase III trials for pulmonary arterial hypertension, a condition with a growing market expected to reach $7.4 billion by 2026. Arena's focus on this area could yield substantial returns if the drug receives regulatory approval.
What Opportunities Does ARNA Have?
- Growing market for chronic disease therapies presents significant revenue potential.
- Expansion into international markets through partnerships and collaborations.
- Potential for licensing agreements post-approval to enhance revenue streams.
What Threats Does ARNA Face?
- Intense competition from other biotechnology firms and pharmaceutical companies.
- Regulatory hurdles and potential delays in drug approvals.
- Market volatility affecting funding and investment in R&D.
What Are ARNA's Competitive Advantages?
- Strong pipeline of investigational drugs targeting high unmet medical needs.
- Strategic partnerships with established pharmaceutical companies like Pfizer.
- Expertise in pharmacology and pharmacokinetics providing a competitive edge in drug development.
What Does ARNA Do?
Founded in 1997, Arena Pharmaceuticals, Inc. is a biopharmaceutical company headquartered in San Diego, California. The company was established with the vision of creating innovative medicines that leverage advanced pharmacological and pharmacokinetic principles to address unmet medical needs. Over the years, Arena has developed a robust pipeline of investigational drugs targeting various conditions, including gastrointestinal disorders, dermatological conditions, and cardiovascular diseases. The company’s lead product candidate, Etrasimod (APD334), is currently undergoing multiple clinical trials, including Phase III trials for ulcerative colitis and atopic dermatitis, as well as Phase II trials for Crohn's disease and alopecia areata. Additionally, Arena is developing Olorinab (APD371) for abdominal pain associated with irritable bowel syndrome and APD418 for acute heart failure, among other candidates. The company has formed strategic collaborations with notable partners such as United Therapeutics Corporation and Boehringer Ingelheim, enhancing its research capabilities and market reach. In March 2022, Arena Pharmaceuticals became a subsidiary of Pfizer Inc., which has provided additional resources and support for its ongoing clinical programs. With a dedicated workforce of 448 employees, Arena is committed to advancing its pipeline and delivering innovative therapies to patients worldwide.
What Products and Services Does ARNA Offer?
- Develop novel biopharmaceutical products targeting chronic diseases.
- Conduct clinical trials to evaluate the safety and efficacy of investigational drugs.
- Collaborate with other pharmaceutical companies to enhance research capabilities.
- Leverage advanced pharmacological principles to create innovative therapies.
- Focus on multiple therapeutic areas including gastrointestinal, dermatological, and cardiovascular conditions.
How Does ARNA Make Money?
- Revenue generated through the development and commercialization of biopharmaceutical products.
- Collaborative agreements with other companies to share research and development costs.
- Potential licensing agreements for successful therapies post-approval.
- Investment in clinical trials to advance product candidates toward market approval.
What Industry Does ARNA Operate In?
The biotechnology industry is experiencing rapid growth, driven by advancements in drug discovery and personalized medicine. The global biotechnology market is projected to reach $2.44 trillion by 2028, with a CAGR of 15.83% from 2021 to 2028. Within this landscape, Arena Pharmaceuticals, Inc. is positioned as a key player, focusing on developing targeted therapies for chronic diseases. The competitive landscape includes companies like Roivant Sciences Ltd. and Mirati Therapeutics, which are also pursuing innovative treatment options, creating a dynamic environment for growth and collaboration.
Who Are ARNA's Key Customers?
- Healthcare providers and hospitals seeking innovative treatment options.
- Patients suffering from chronic diseases requiring novel therapies.
- Pharmaceutical partners engaged in collaborative research and development.
Research confidence
Thin evidence — scoring coverage unknown. Treat this as a starting point, not a conclusion.
- ● Scoring coverage unknown
- ● Price 5 days old
- ● No filing on record
- ● No analyst coverage
MoonshotScore History
Recorded daily since 2026-08-23 · 4 snapshots
| 2026-08-23 | 53 |
| 2026-08-24 | 53 |
| 2026-08-25 | 53 |
| 2026-08-26 | 53 |
What changed?
The score has stayed at 53.
Over the same 3 days the stock moved +0.0%.
Company Profile
Arena Pharmaceuticals, Inc. operates in the Biotechnology industry within the Healthcare sector. It is headquartered in San Diego, US. The company is led by CEO Amit Munshi. ARNA has traded publicly since 2000.
Insider Activity
The most recent 12 insider filings for Arena Pharmaceuticals, Inc. break down as 12 sales and 0 purchases. On net that is roughly 95K shares disposed (about $2.6M), a signal worth weighing alongside the fundamentals.
Earnings Track Record
Arena Pharmaceuticals, Inc. has beaten Wall Street's EPS estimate in 4 of its last 8 reported quarters — more hits than misses. Reported results have landed about 0.5% below estimates on average.
Key Financial Metrics
Return on equity for Arena Pharmaceuticals, Inc. stands at -70.8%, a gauge of how efficiently it converts shareholder capital into profit. Return on assets is -79.1%, showing how much profit it generates from its asset base. A current ratio of 8.59 indicates the company holds enough short-term assets to cover its near-term obligations. Its earnings yield is -11.3%, the inverse of the P/E and a quick read on earnings relative to price.
ARNA Financials
Fundamental Snapshot
Based on FMP financials and quantitative analysis
Bull Case vs Bear Case
Bull Case
- Robust pipeline with multiple candidates in advanced clinical stages.
- Strong collaboration with Pfizer providing financial and operational support.
- High gross margin potential due to focus on innovative therapies.
- Upcoming: Potential market approval for Etrasimod in ulcerative colitis and atopic dermatitis expected in 2026.
Bear Case
- Negative profit margin indicating high R&D expenditures.
- Dependence on successful clinical trial outcomes for revenue generation.
- Limited product portfolio until candidates receive regulatory approval.
- Potential: Regulatory challenges could delay the approval of key drug candidates.
AI-generated arguments based on insider flow, news sentiment and technicals — not financial advice · May 2026
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Latest News
Leadership: Amit Munshi
CEO
Amit Munshi has extensive experience in the biopharmaceutical industry, having held various leadership roles in both public and private companies. He has a strong track record in advancing drug development and commercialization strategies, contributing to the growth of several biotechnology firms. Munshi holds a degree in economics from the University of California, Berkeley, and an MBA from Harvard Business School.
Track Record: Under Amit Munshi's leadership, Arena Pharmaceuticals has successfully advanced its clinical pipeline, culminating in the acquisition by Pfizer in 2022. His strategic vision has positioned the company for growth in the competitive biopharmaceutical landscape.
ARNA Healthcare Stock FAQ
What happened to Arena Pharmaceuticals, Inc. (ARNA) stock?
Arena Pharmaceuticals, Inc. (ARNA) no longer trades on public markets. The figures below are historical and are not a current quote.
Can I still buy ARNA shares?
No. ARNA stopped trading on public markets, so the shares are not available through a broker. Anything you see quoted for ARNA elsewhere is historical data, not a live market.
Are the figures on this page current?
No. Every number here is the last value recorded before ARNA stopped trading. Nothing on this page updates, and none of it is a current quote.
Why does this page still exist?
Because people still search for what happened to Arena Pharmaceuticals, Inc.. An archived profile that states the delisting plainly is more useful than a dead link — provided it is labelled as history, which is what this page does.
What does Arena Pharmaceuticals, Inc. do?
Arena Pharmaceuticals, Inc. is a biopharmaceutical company that develops innovative medicines for chronic diseases. The company focuses on creating novel therapeutic solutions through its extensive clinical pipeline, which includes drugs targeting conditions such as ulcerative colitis, Crohn's disease, and pulmonary arterial hypertension.
What is Arena Pharmaceuticals, Inc.'s drug pipeline status?
Arena Pharmaceuticals, Inc. has a diverse pipeline of investigational drugs in various clinical stages. Key candidates include Etrasimod, which is in Phase III trials for ulcerative colitis and atopic dermatitis, and Olorinab, currently in Phase IIb trials for irritable bowel syndrome.
What are the main risks for ARNA?
Arena Pharmaceuticals, Inc. faces several risks, including regulatory hurdles that could delay the approval of its drug candidates, high research and development costs impacting short-term profitability, and competitive pressures from other biotechnology firms that may affect its market position.
Disclaimer: This content is for informational purposes only and does not constitute investment advice. Always do your own research and consult a financial advisor.
Official Resources
Data provided for informational purposes only.
- Data is based on the latest available information and may be subject to change.