UnitedHealth Group

Head office location: Minnesota, USA 
Market cap: $459.05 billion 
Business line: Health insurance

UnitedHealth Group is a diversified health and well-being company based in Minneapolis. The health insurance giant serves clients and consumers in the US and over 130 other countries through two distinct platforms, namely: 

1. UnitedHealthcare: The firm’s insurance arm provides healthcare coverage and benefits through its network of more than 1.3 million physicians and healthcare professionals and 6,500 hospitals. 
2. Optum: Its tech unit offers information and technology-enabled health services. 

Not only are they the largest insurance company in the world based on market cap but UnitedHealth also boasts a workforce that includes 85,000 nurses and physicians focused on helping people live healthier lives. It also invests nearly $3.5 billion in technology and innovation, and processes approximately 1.1 trillion transactions annually.