Direct Answer
12 SEC filers are classified under the Standard Industrial Classification codes that describe the health insurance industry, and their latest annual reports show $908.4 billion of combined revenue and a median operating margin of 2.1%. Investors should still evaluate its revenue model, industry-specific KPIs, valuation framework and the risks that can change the group's economics.
Industry Overview
Health insurers collect premiums and pay medical claims for employer, Medicare, Medicaid and individual plans. The medical loss ratio, government rate setting and cost trends decide profit. The first numbers to compare across companies here are medical loss ratio, membership by product and premium growth.
Key Industry Metrics
- Medical loss ratio: Share of premiums paid out as medical claims and quality costs. Low readings mean higher margin, and regulations set minimums for some plans.
- Membership by product: Number of covered people in employer, Medicare, Medicaid and individual plans. The mix matters, since each product has different margins and risk.
- Premium growth: Increase in premiums collected, from price rises and enrolment. Growth needs to cover medical cost inflation to protect margin.
- Operating margin: Operating income as a share of revenue. Margins are thin in this business, so small shifts in claims costs move profit a lot.
- Medical cost trend: Change in per-member medical spending, driven by prices, use and drugs. If it outpaces premium increases, margins fall.
Primary Macro Drivers
- Medical utilization and costs: Costs of care, how often members use it, and prices paid to providers set the medical loss ratio, so utilization changes move margins.
- Government rate updates: Medicare and Medicaid payment rates set premiums for large member groups, so annual rate decisions drive revenue and margin.
- Enrollment in Medicare Advantage and Medicaid: Members shifting among Medicare Advantage, Medicaid and employer coverage change membership by product and premium growth.
- Drug costs: Higher prices for specialty and other drugs raise claims unless premiums or rebates rise to match. Watch medical cost trend and the loss ratio.
Major Risks
- Medical cost spikes: When costs rise faster than premiums, the medical loss ratio climbs and margins fall. Watch medical loss ratio and medical cost trend.
- Government rate cuts and policy changes: Lower government payments or new rules on coverage and risk scoring can reduce revenue for large programs. Watch rate notices and membership by product.
- Regulatory scrutiny: Audits, rules on claims handling and merger review can bring penalties and limit strategy. Watch legal proceedings and regulatory disclosures.
- Provider and drug pricing: Hospital consolidation and drug pricing raise claims costs beyond expectations. Watch medical cost trend and commentary on contracts.
Industry Characteristics
| Characteristic | Profile |
|---|---|
| Cyclicality | Defensive |
| Capital Intensity | Medium |
| Regulatory Intensity | High |
| Industry Maturity | Mature |
| Geographic Importance | U.S. |
Health Insurance Filers in the SEC Record
12 companies with annual reports in the dataset are classified by the SEC in the Standard Industrial Classification codes 6321, 6324. Their latest fiscal years end in 2025, and together they reported $908.4 billion of revenue. Median revenue growth over the prior year was 10.7%. Median operating margin was 2.1% and median net margin 1.6%. Median total liabilities were 74% of total assets, and 8 of 12 reported a profit in their latest year.
| Company | Revenue | Growth | Operating margin | Net margin | Year |
|---|---|---|---|---|---|
| Cigna Group | $274.9 billion | 11.2% | 3.3% | 2.2% | FY 2025 |
| Elevance Health, Inc. | $199.1 billion | 12.5% | 3.6% | 2.8% | FY 2025 |
| Centene Corp | $194.8 billion | 19.4% | -3.9% | -3.4% | FY 2025 |
| Humana Inc | $129.7 billion | 10.1% | 2.1% | 0.9% | FY 2025 |
| Molina Healthcare, Inc. | $45.4 billion | 11.7% | 1.7% | 1.0% | FY 2025 |
| Aflac Inc | $17.2 billion | -9.3% | n/a | 21.2% | FY 2025 |
| Principal Financial Group Inc | $15.6 billion | -3.1% | n/a | 8.0% | FY 2025 |
| Unum Group | $13.1 billion | 1.5% | n/a | 5.6% | FY 2025 |
The 8 largest of 12 by revenue. Source: each company's own annual report as filed with the SEC (XBRL data), figures in U.S. dollars. A company's SIC code reflects its main business as the SEC records it, so it can differ from how an index provider or analyst classifies the company, and a diversified group appears under only one code.
Where to Go Next
The Health Insurance guide describes how the industry earns money, what to measure and what can go wrong. To see how it compares, read the neighbouring industries in the same sector, then apply the same checks to a specific company.
More in Financials
- Financials sector overview
- Hedge Fund Managers
- Group Benefits Insurance
- Homeowners Insurance
- Fund Administration
- Index Providers
- Full-Service Brokerages
- Insurance
- Fintech Infrastructure
Put it to work
Frequently Asked Questions
What are the main KPIs for the Health Insurance industry?
Key performance indicators for the Health Insurance industry include: Medical loss ratio, Membership by product, Premium growth, Operating margin, Medical cost trend. Which matter most depends on the company's model, so compare them across several companies rather than relying on one.
How cyclical is the Health Insurance industry?
The Health Insurance industry is generally defensive, meaning demand tends to remain relatively stable regardless of the economic cycle. Companies in this space can provide portfolio stability during recessions, though growth may lag in strong expansions.
What are the biggest risks in the Health Insurance industry?
The primary risks for Health Insurance companies include: Medical cost spikes, Government rate cuts and policy changes, Regulatory scrutiny, Provider and drug pricing. Investors should assess each company's exposure to these factors and its track record of navigating them.