| CICoaters INC | New Bedford | MA | Textile Mills313320 | — | ◇ UNVERIFIED |
| CACoating Application Technologies INC | Woburn | MA | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| CCCoca Cola | Needham | MA | Beverage and Tobacco Product Manufacturing312111 | — | ◇ UNVERIFIED |
| CHCole Hersee Company | Boston | MA | Electrical Equipment, Appliance & Component Manufacturing335931 | — | ◇ UNVERIFIED |
| CMColeman Manufacturing | Everett | MA | Nonmetallic Mineral Product Manufacturing327992 | — | ◇ UNVERIFIED |
| CACollins & Aikman Fabrics | Lowell | MA | Textile Mills313310 | — | ◇ UNVERIFIED |
| CIColorgraphics INC | Malden | MA | Printing and Related Support Activities323113 | — | ◇ UNVERIFIED |
| CSCommercial Sheet Metal | Canton | MA | Fabricated Metal Product Manufacturing332322 | — | ◇ UNVERIFIED |
| CSCommonwealth Sprague Capacitor Incorporated | N Adams | MA | Computer and Electronic Product Manufacturing334414 | — | ◇ UNVERIFIED |
| CNCommunity Newspaper Company | Auburn | MA | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| CWConcord Wire Company | Worcester | MA | Fabricated Metal Product Manufacturing332618 | — | ◇ UNVERIFIED |
| CTCongress Technical Spray | Dracut | MA | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| CPConnectivity Products Bsc Division | Leominster | MA | Primary Metal Manufacturing331422 | — | ◇ UNVERIFIED |
| CVConn Valley Block CO | W Springfield | MA | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| CCConsolidated Color | Peabody | MA | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| CSConstruction Service, LLC | Northampton | MA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CCContinental Consolidated Industries | Worcester | MA | Furniture and Related Product Manufacturing337211 | — | ◇ UNVERIFIED |
| CBCoppola Bus CO. | Haverhill | MA | Computer and Electronic Product Manufacturing334220 | — | ◇ UNVERIFIED |
| CICorning INC | Sturbridge | MA | Machinery Manufacturing333314 | — | ◇ UNVERIFIED |
| CHCountry Home Furniture | Gardner | MA | Furniture and Related Product Manufacturing337122 | — | ◇ UNVERIFIED |
| CWCourier Westford INC | Westford | MA | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| CRCovanta Resource Recovery Facility | Pittsfield | MA | Fabricated Metal Product Manufacturing332313 | — | ◇ UNVERIFIED |
| CICpc Incorporated | Randolph | MA | Computer and Electronic Product Manufacturing334412 | — | ◇ UNVERIFIED |
| CCCpf Co-op INC | Ayer, Town of | MA | Beverage and Tobacco Product Manufacturing312111 | — | ◇ UNVERIFIED |
| CRCpi Radant Technologies Division INC | Clinton | MA | Electrical Equipment, Appliance & Component Manufacturing335999 | — | ◇ UNVERIFIED |
| CPCranston Print Works CO | Webster | MA | Textile Mills313310 | — | ◇ UNVERIFIED |
| CSCreatek Stone INC | Southbridge | MA | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| CCCreative Chemicals INC | Holyoke | MA | Chemical Manufacturing325611 | — | ◇ UNVERIFIED |
| CMCreative Modeling & Design | North Attleboro | MA | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| CPCreative Packaging and Paper | Worcester | MA | Paper Manufacturing322120 | — | ◇ UNVERIFIED |
| CPCricket Press | Manchester | MA | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| CTCri Tech | Hanover | MA | Chemical Manufacturing325212 | — | ◇ UNVERIFIED |
| CICri-tech INC | Hanover | MA | Chemical Manufacturing325212 | — | ◇ UNVERIFIED |
| CTCrocker Technical Papers | Fitchburg | MA | Paper Manufacturing322120 | — | ◇ UNVERIFIED |
| CCCroft Corporation | Upton | MA | Printing and Related Support Activities323113 | — | ◇ UNVERIFIED |
| CVCrosby Valve & Gage CO | Wrentham | MA | Fabricated Metal Product Manufacturing332911 | — | ◇ UNVERIFIED |
| CBCrown Beverage Packaging USA | Lawrence | MA | Fabricated Metal Product Manufacturing332431 | — | ◇ UNVERIFIED |
| CICrystal Ice Plant | New Bedford | MA | Beverage and Tobacco Product Manufacturing312113 | — | ◇ UNVERIFIED |
| CDCti-cryogenics Div Brooks Automation | Mansfield | MA | Machinery Manufacturing333248 | — | ◇ UNVERIFIED |
| CWCubit Wire & Cable | Holyoke | MA | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| CFCumberland Farms INC | Westborough | MA | Food Manufacturing311812 | — | ◇ UNVERIFIED |
| CFCumberland Farms INC | Canton | MA | Food Manufacturing311520 | — | ◇ UNVERIFIED |
| CCCuming CORP. | Avon | MA | Plastics and Rubber Products Manufacturing326140 | — | ◇ UNVERIFIED |
| CLCurrent Lighting - Plympton | Plympton | MA | Electrical Equipment, Appliance & Component Manufacturing335122 | — | ◇ UNVERIFIED |
| CFCurtis Fine Papers | Adams, Town of | MA | Paper Manufacturing322110 | — | ◇ UNVERIFIED |
| CPCurtis Papers INC | Adams | MA | Paper Manufacturing322110 | — | ◇ UNVERIFIED |
| CWCurtiss Wright Controls | Littleton | MA | Computer and Electronic Product Manufacturing334419 | — | ◇ UNVERIFIED |
| CCCurtiss-wright Controls Embedded Computing | Littleton | MA | Computer and Electronic Product Manufacturing334419 | — | ◇ UNVERIFIED |
| CMCustom Marble Design INC | Agawam | MA | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| CRCustom Railing Technology INC | Westfield | MA | Wood Product Manufacturing321918 | — | ◇ UNVERIFIED |
