To determine the Best Workplaces, Fortune partnered with the people analytics firm, Great Place to Work®, to analyze anonymous survey feedback representing more than 4.4 million US employees.

The Philadelphia Inquirer recognizes companies and organizations in Philadelphia as a top workplace each year.

Vault asked thousands of current and former interns which employers have the most prestigious internships. Vault's Most Prestigious Internships represent the employers whose internships were rated highest in prestige.