| FSFenwal Safety Systems | Marlborough | MA | Computer and Electronic Product Manufacturing334510 | — | ◇ UNVERIFIED |
 Fiba Technologies | Westborough | MA | Machinery Manufacturing333912 | — | ◇ UNVERIFIED |
| Fiba Technologies INC | Millbury | MA | Fabricated Metal Product Manufacturing332313 | — | ◇ UNVERIFIED |
| FSFiltration Specialties | Taunton | MA | Textile Mills313210 | — | ◇ UNVERIFIED |
| FEFiltrona Extrusion | Northborough | MA | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| FTFinish Tech | Haverhill | MA | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| FUFinish Unlimited Incorporated | Dracut | MA | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| FUFinish Unlimited Incorporated | Dracut | MA | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
 Fleming Industries | Chicopee | MA | Textile Product Mills314910 | — | ◇ UNVERIFIED |
| FCFlexcon Company INC Plant 1 | Spencer | MA | Textile Mills313320 | — | ◇ UNVERIFIED |
| FCFlo Chemical CORP | Ashburnham | MA | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
| FTF.l. Tripp and Sons, Inc.-station #1 | Westport Point | MA | Transportation Equipment Manufacturing336612 | — | ◇ UNVERIFIED |
| FCFoam Concepts INC | Uxbridge | MA | Plastics and Rubber Products Manufacturing326140 | — | ◇ UNVERIFIED |
| FDFootjoy Division Acushnet CO | Brockton | MA | Apparel Manufacturing315990 | — | ◇ UNVERIFIED |
| FPForest Products Associates | Greenfield | MA | Wood Product Manufacturing321999 | — | ◇ UNVERIFIED |
| FFFoto Factory | Salem | MA | Electrical Equipment, Appliance & Component Manufacturing335110 | — | ◇ UNVERIFIED |
| FCFourstar Connections INC | Hudson | MA | Computer and Electronic Product Manufacturing334419 | 20-99 | ◇ UNVERIFIED |
| FCFoxfire Coatings | Gloucester | MA | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| FIFp International Packaging | Auburn | MA | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| FMFraen Machining Corporation | Woburn | MA | Fabricated Metal Product Manufacturing332721 | — | ◇ UNVERIFIED |
| FCFrank C Meyer Company | Lawrence | MA | Food Manufacturing311812 | — | ◇ UNVERIFIED |
 Franklin Fixtures INC | Wareham | MA | Furniture and Related Product Manufacturing337212 | — | ◇ UNVERIFIED |
| FLFrito Lay INC | Randolph | MA | Food Manufacturing311821 | — | ◇ UNVERIFIED |
| FFFuji Film Recording Media Mfg | Bedford | MA | Computer and Electronic Product Manufacturing334111 | — | ◇ UNVERIFIED |
| FSFuller System INC | Woburn | MA | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| FRFurniture Rehab INC | Fitchburg | MA | Furniture and Related Product Manufacturing337122 | — | ◇ UNVERIFIED |
| FLFw Lombard CO | Gardner | MA | Furniture and Related Product Manufacturing337122 | — | ◇ UNVERIFIED |
| GMGaf Materials | Millis | MA | Petroleum and Coal Products Manufacturing324122 | — | ◇ UNVERIFIED |
| GFGarelick Farms Lynn Plant | Lynn | MA | Food Manufacturing311511 | — | ◇ UNVERIFIED |
| GPGarlock Printing & Convertin | Gardner | MA | Paper Manufacturing322232 | — | ◇ UNVERIFIED |
| GRGa Rodgers Incorporated | Fall River | MA | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| GWGavitt Wire & Cable | Brookfield | MA | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| GAGcp Applied Technologies INC | Wilmington | MA | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| GAGcp Applied Technologies INC. | Cambridge | MA | Chemical Manufacturing325520 | — | ◇ UNVERIFIED |
| GIGe Ionics | Watertown | MA | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| GCGeneral Cable | Taunton | MA | Primary Metal Manufacturing331422 | — | ◇ UNVERIFIED |
| GCGeneral Cable Corporation | South Hadley | MA | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| GCGeneral Cable Industries | Franklin | MA | Primary Metal Manufacturing331421 | — | ◇ UNVERIFIED |
| GDGeneral Dynamics Advanced Information Systems | Pittsfield | MA | Fabricated Metal Product Manufacturing332994 | — | ◇ UNVERIFIED |
| GDGeneral Dynamics Advanced Info Systems | Pittsfield | MA | Fabricated Metal Product Manufacturing332995 | — | ◇ UNVERIFIED |
| GLGeneral Latex & Chem. CORP. | Billerica | MA | Plastics and Rubber Products Manufacturing326299 | — | ◇ UNVERIFIED |
| GSGeneral Sandblasting | West Bridgewater | MA | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| GSGeneral Steel Products | Everett | MA | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
 General Tool INC | Worcester | MA | Fabricated Metal Product Manufacturing332213 | — | ◇ UNVERIFIED |
| GCGenzyme CORP | Allston | MA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| GDGenzyme Drug Discovery & Development | Waltham | MA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| GMGeorge Meade Foundry | Bedford | MA | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| GPGermanium Power Devices CORP | Andover | MA | Computer and Electronic Product Manufacturing334413 | — | ◇ UNVERIFIED |
| GBGfi Big Joe LLC | Wilmington | MA | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| GAGillette Andover Manufacturing Center | Andover | MA | Chemical Manufacturing325620 | — | ◇ UNVERIFIED |
