List of Publicly Traded Health Insurance and Health Care Plan
Analyze the 2026 landscape of health plan providers, featuring enrollment rankings and market cap data for leaders in Medicare Advantage and Medicaid managed care.
The List of Publicly Traded Health Insurance and Health Care Plan providers identifies the primary organizations managing medical risk for over 150 million Americans. As of April 2026, the sector is defined by a massive shift toward government-sponsored programs, with Medicare Advantage and Medicaid managed care (MCO) now representing the majority of industry growth. Investors often monitor these firms within the broader List of Insurance Companies to compare risk-adjusted returns against life and property casualty peers. Market leaders like UnitedHealth (UNH #1 52M members) continue to leverage vertical integration to manage rising Medical Loss Ratios (MLR). Understanding the regulatory environment, including CMS reimbursement pivots and ACA exchange fluctuations, is vital for evaluating long-term stability in the health plan space.
Key Takeaways
Government-sponsored Medicare Advantage (MA) plans now account for over 50% of the Medicare market, with Humana (HUM MA specialist) and UNH controlling nearly half of total enrollment.
The Medical Loss Ratio (MLR) averaged 87.5% in 2025. Firms that successfully manage claims costs below the 85% corridor in ACA exchanges generally see superior margin expansion.
Medicaid managed care has reached 60% penetration. Centene (CNC Medicaid leader) remains the dominant player, managing risk for over 28 million Medicaid members.
Consolidation has shifted the landscape, notably the Aetna-CVS merger, allowing plans to integrate pharmacy benefit management (PBM) and care delivery under one corporate umbrella.
Top List of Publicly Traded Health Insurance and Health Care Plan by Market Cap (2026)
Ranking the 2026 leaders by enrollment scale and market valuation, reflecting a sector heavily concentrated in diversified managed care giants.
| Rank | Ticker | Company | Total Members | Market Cap | YTD % | 2025 MLR | Primary Focus |
|---|---|---|---|---|---|---|---|
| 1 | UNH | UnitedHealth Group | 52.0M | $450B | +6.0% | 87.2% | Diversified |
| 2 | ELV | Elevance Health | 47.0M | $110B | +4.5% | 87.8% | Blue Cross |
| 3 | CVS | CVS Health (Aetna) | 36.0M | $100B | +3.2% | 88.1% | Integrated |
| 4 | CI | Cigna Group | 18.0M | $95B | +12.0% | 86.5% | Commercial |
| 5 | CNC | Centene Corp. | 28.0M | $40B | +5.4% | 88.5% | Medicaid |
| 6 | HUM | Humana Inc. | 17.0M | $35B | -2.1% | 89.2% | Medicare |
| 7 | MOH | Molina Healthcare | 15.0M | $22B | +18.0% | 88.2% | Medicaid |
| 8 | OSCR | Oscar Health | 1.5M | $4.3B | +14.5% | 84.0% | Tech/ACA |
| 9 | ALHC | Alignment Health | 0.2M | $1.8B | +8.0% | 86.5% | Medicare |
List of Publicly Traded Health Insurance and Health Care Plan — Complete Company List
Mid-Cap Companies
Health Insurance: Large-Cap Stocks
- Aetna Inc. (AET) (Behavioral health, dental, disability, group life, medical, and pharmacy)
- Aflac Incorporated (AFL) (Supplemental Health and Life)
- Anthem, Inc. (ANTM) (Health care plans)
- Centene Corporation (CNC) (Governmental programs for uninsured and under-insured)
- Cigna Corporation (CI) (Behavioral, dental, group disability, group life, and pharmacy)
- Humana Inc. (HUM) (Group health, Medicare plans, and supplemental insurance)
- UnitedHealth Group Incorporated (UNH) (Health benefits and services)
Health Insurance: Mid-Cap Stocks
- CNO Financial Group, Inc. (CNO) (Annuities, life, and supplemental health)
- Molina Healthcare Inc. (MOH) (Government-sponsored healthcare programs)
- WellCare Health Plans, Inc. (WCG) (Government-sponsored healthcare programs)
Health Insurance: Micro-Cap Stocks
- eHealth, Inc. (EHTH) (Comparative health insurance website)
- Health Insurance Innovations, Inc. (HIIQ) (Web-based platform; develops and administers web-based health insurance plans)
Corporate Rebranding & Merger Timeline
| Legacy Name | Old Ticker | Current Ticker | Year | Impact / Status |
|---|---|---|---|---|
| Aetna | AET | CVS | 2018 | Acquired by CVS Health ($69B) |
| Anthem | ANTM | ELV | 2022 | Rebranded to Elevance Health |
| WellCare | WCG | CNC | 2020 | Merged with Centene |
| Cigna | CI | CI | 2023 | Rebranded to The Cigna Group |
Risks & Considerations
CMS Reimbursement Rate Pressure
Medicare Advantage providers face a -2.3% reimbursement cut in 2026. Firms with low Star Ratings are particularly vulnerable to margin compression as federal quality bonuses decline.
Medicaid Redetermination Churn
Post-pandemic redeterminations have caused significant membership churn in the Medicaid segment. Companies like Centene and Molina must manage these eligibility shifts to maintain revenue stability.
Regulatory & ACA Policy Shifts
The health insurance market is highly sensitive to political changes. A "subsidy cliff" in ACA exchanges or changes to risk adjustment models can instantly alter the profitability of individual market plans.
Rising Medical Loss Ratios (MLR)
An unexpected surge in medical utilization or high-cost pharmaceutical launches (e.g., GLP-1s) can drive MLRs above projected levels, leading to immediate quarterly earnings misses across the sector.