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Companies headquartered in Massachusetts

205 public companies are headquartered in Massachusetts, including 21 in the S&P 500 or Nasdaq-100. The biggest concentrations are in Boston, Cambridge and Waltham.

205 companies · 46 cities · 21 ★ index members

Boston 51

Cambridge 31

Waltham 22

Burlington 9

Newton 9

Watertown 9

Andover 5

Bedford 5

Needham 5

Wilmington 5

Beverly 4

Lexington 4

Woburn 4

Billerica 3

Framingham 3

Marlborough 3

Acton 2

Lowell 2

Westford 2

Elsewhere in Massachusetts 27

Other states: California Texas New York Florida Pennsylvania Illinois Virginia New Jersey Ohio Colorado Georgia North Carolina Connecticut Maryland Arizona Washington Tennessee Minnesota Michigan Wisconsin Indiana Utah Missouri Nevada Delaware Oklahoma Louisiana Kentucky Arkansas Nebraska South Carolina Alabama Oregon Iowa Kansas Washington, D.C. Idaho New Hampshire Rhode Island Montana North Dakota West Virginia Hawaii Maine South Dakota Mississippi

Headquarters are each company's principal executive office as filed with the SEC (EDGAR business address), as of October 3, 2026. ★ marks S&P 500 and Nasdaq-100 members. All locations.