List of companies based in the Philadelphia area

This is a list of companies either based or with large operations in the Philadelphia and greater Delaware Valley region area of the United States.

Corporations that moved to a different region

 * Amkor Technology - moved from West Chester, Pennsylvania to Chandler, Arizona
 * Bell Atlantic - after merger with NYNEX, headquarters moved from Philadelphia to New York City; a significant workforce remains in the area
 * Breyers - acquired by Kraft Foods and then by Unilever
 * Jones Apparel Group - moved to New York City
 * Whitman's - now operated by Russell Stover; based in Colorado

Less notable Philadelphia corporations

 * Burnt Toast Vinyl
 * Campus Apartments
 * Day's Beverages
 * Yards Brewing Company
 * Zivtech - software and web development