Centene Corporation operates as a multi-national healthcare enterprise that provides programs and services to under-insured and uninsured individuals in the United States.

Elevance Health Inc. operates as a health benefits company. It supports consumers, families, and communities across the entire care journey connecting to the care, support, and resources to lead healthier lives.

UnitedHealth Group Incorporated operates as a diversified health care company in the United States. It operates through four segments: UnitedHealthcare, Optum Health, Optum Insight, and Optum Rx. The UnitedHealthcare segment offers consumer-oriented health benefit plans and services for national employers, public sector employers, mid-sized employers, small businesses, and individuals; health care coverage and well-being services to individuals age 50 and older addressing their needs for preventive and acute health care services, as well as services dealing with chronic disease and other specialized issues for older individuals; Medicaid plans, children's health insurance and health care programs; health and dental benefits; and hospital and clinical services.

CVS Health Corporation provides health services in the United States. The company's Health Care Benefits segment offers traditional, voluntary, and consumer-directed health insurance products and related services.

Cigna Corporation provides insurance and related products and services in the United States. Its Evernorth segment provides a range of coordinated and point solution health services, including pharmacy, benefits management, care delivery and management, and intelligence solutions to health plans, employers, government organizations, and health care providers.

Humana Inc., together with its subsidiaries, operates as a health and well-being company in the United States. It operates through three segments: Retail, Group and Specialty, and Healthcare Services.

Alignment Healthcare, Inc., a tech-enabled Medicare advantage company, operates consumer-centric health care platform. It provides customized health care in the United States to seniors and those who need it through its Medicare advantage plans.