UnitedHealth Group

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The Minnesota-based health insurer thrived during the pandemic year, climbing two spots on the list. While widespread layoffs led to a decline in the number of individuals covered by its commercial insurance, the firm’s 6.2% revenue growth was powered by greater enrollment in its Medicare Advantage and Medicaid plans, and by the strong performance of Optum, its sprawling $136 billion health services business. Despite the costs of covering COVID patients, UnitedHealth’s profits jumped 11.3%, owing to members’ decreased use of health services during the pandemic. In an abrupt leadership change, Andrew Witty, who previously ran the company’s Optum division, became CEO in February 2021.