US Insurance Industry — Key Facts
| Total US Market | ~$2.8 trillion in premiums (2023) |
| Largest Sector | Health Insurance (by premium volume) |
| Top P&C Insurer | State Farm |
| Top Health Insurer | UnitedHealth Group |
The United States insurance industry is the world’s largest, accounting for nearly 40% of global insurance premiums. The sector spans property & casualty (P&C), health, life, and specialty insurance lines. Here are the top 10 US insurance companies by direct written premiums and market presence across all sectors.
Top 10 US Insurance Companies
1. UnitedHealth Group (NYSE: UNH) — The largest US insurer by revenue, UnitedHealth dominates the health insurance market through UnitedHealthcare and also operates Optum (health services and analytics). Revenue exceeds $370 billion annually. 2. Berkshire Hathaway — Warren Buffett’s conglomerate owns GEICO (auto insurance), Gen Re (reinsurance), and Berkshire Hathaway Specialty Insurance, making it one of the largest insurance groups in the world.
3. State Farm — The largest US P&C insurer and a mutual company. State Farm leads in auto and homeowners insurance by market share. 4. Progressive Corporation (NYSE: PGR) — A leading auto insurer known for its direct-to-consumer model and telematics-based pricing. 5. Anthem/Elevance Health (NYSE: ELV) — One of the largest health insurers in the US, operating Blue Cross Blue Shield plans in 14 states.
6. Allstate Corporation (NYSE: ALL) — Major P&C insurer covering auto, home, and life. 7. Cigna Group (NYSE: CI) — Health and life insurance, with a major pharmacy benefit management arm (Evernorth). 8. Aetna (owned by CVS Health, NYSE: CVS) — Major health insurer acquired by CVS Health in 2018 for $69 billion. 9. Liberty Mutual — Private P&C insurer, one of the world’s largest. 10. Travelers Companies (NYSE: TRV) — Major commercial and personal P&C insurer.
Ownership Overview
Of the top 10 US insurers, most are publicly traded companies. State Farm, Liberty Mutual, and USAA (which would be #11) are notable exceptions as either mutual or non-profit companies owned by their policyholders or members. Berkshire Hathaway’s insurance subsidiaries are privately owned within Warren Buffett’s conglomerate. The trend toward consolidation has reshaped the industry, with health insurers in particular growing through acquisitions.
