| GFGarlock Flexibles Converting | Gardner | MA | Printing and Related Support Activities323111 | 20-99 | ◐ LIKELY ACTIVE |
| GDGeneral Dynamics Mission Systems, INC. | Taunton | MA | Computer and Electronic Product Manufacturing334220 | — | ◐ LIKELY ACTIVE |
| GDGeneral Dynamics Mission Systems, INC. | Quincy | MA | Computer and Electronic Product Manufacturing334511 | — | ◐ LIKELY ACTIVE |
General Mills Yoplait Yogurt Plant | Methuen | MA | Food Manufacturing311511 | — | ◐ LIKELY ACTIVE |
| GMGenezen MA, Inc | Lexington | MA | Chemical Manufacturing325414 | 100-499 | ◐ LIKELY ACTIVE |
| GGenzyme | Framingham | MA | Chemical Manufacturing325411 | 500+ | ◐ LIKELY ACTIVE |
| GCGeorgiapacific Consumer Operations LLC | Leominster | MA | Plastics and Rubber Products Manufacturing326199 | — | ◐ LIKELY ACTIVE |
| GPG&f Precision Molding Danvers | Danvers | MA | Chemical Manufacturing325212 | 20-99 | ◐ LIKELY ACTIVE |
| GIGilbert Industrial, Incorporated | Pepperell | MA | Machinery Manufacturing333992 | 1-19 | ◐ LIKELY ACTIVE |
| GVGiovanni Veal, Inc. | Woburn | MA | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| GIGlyptal INC | Chelsea | MA | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
| GIGrape Island | Rowley | MA | Beverage and Tobacco Product Manufacturing312130 | 1-19 | ◐ LIKELY ACTIVE |
| GIG&s Industrial INC | West Hatfield | MA | Machinery Manufacturing333999 | — | ◐ LIKELY ACTIVE |
| HFHamel Family Farm, LLC | Southampton | MA | Beverage and Tobacco Product Manufacturing312130 | 1-19 | ◐ LIKELY ACTIVE |
| HSHar-per Sales Solutions INC | West Bridgewater | MA | Fabricated Metal Product Manufacturing332216 | 1-19 | ◐ LIKELY ACTIVE |
| HMHarvest Moon Automation INC. | Winchester | MA | Machinery Manufacturing333111 | — | ◐ LIKELY ACTIVE |
| HPHayes Prosthetic INC | West Springfield | MA | Miscellaneous Manufacturing339113 | 1-19 | ◐ LIKELY ACTIVE |
| HCHeveatex (tillotson Complex) | Fall River | MA | Textile Mills313320 | — | ◐ LIKELY ACTIVE |
| HPHewlett Packard | Waltham | MA | Fabricated Metal Product Manufacturing332211 | — | ◐ LIKELY ACTIVE |
| HPHewlett Packard | Marlborough | MA | Computer and Electronic Product Manufacturing334111 | — | ◐ LIKELY ACTIVE |
| HTHigh Technology INC | Attleboro Falls | MA | Chemical Manufacturing325413 | — | ◐ LIKELY ACTIVE |
| IIImmunogen INC | Waltham | MA | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| IEIndustrial Engineering Manufacturing Co, INC | Foxboro | MA | Fabricated Metal Product Manufacturing332322 | 1-19 | ◐ LIKELY ACTIVE |
| IEInteplast Engineered Films - Westborough | Westborough | MA | Plastics and Rubber Products Manufacturing326111 | 20-99 | ◐ LIKELY ACTIVE |
| IMInternational Micro Photonix INC | North Andover | MA | Machinery Manufacturing333310 | 1-19 | ◐ LIKELY ACTIVE |
| IIInterprint, INC | Pittsfield | MA | Printing and Related Support Activities323111 | 100-499 | ◐ LIKELY ACTIVE |
| IPInvaGen Pharmaceutical Inc. Unit 4 | Fall River | MA | Chemical Manufacturing325412 | 20-99 | ◐ LIKELY ACTIVE |
| JAJ and J Junk Car Removal | North Grafton | MA | Transportation Equipment Manufacturing336110 | — | ◐ LIKELY ACTIVE |
| JTJenwey Tea CO | Lowell | MA | Food Manufacturing311920 | 1-19 | ◐ LIKELY ACTIVE |
| JAJoseph Abboud Manufacturing CORP. | New Bedford | MA | Apparel Manufacturing315210 | — | ◐ LIKELY ACTIVE |
| JGJoseph's Gourmet Pasta Company | Haverhill | MA | Food Manufacturing311412 | 100-499 | ◐ LIKELY ACTIVE |
| JLJsb Lawrence | Lawrence | MA | Food Manufacturing311812 | 100-499 | ◐ LIKELY ACTIVE |
| JMJushi Ma INC | Lakeville | MA | Miscellaneous Manufacturing339999 | — | ◐ LIKELY ACTIVE |
| KIKampersal, INC. | Dedham | MA | Fabricated Metal Product Manufacturing332999 | — | ◐ LIKELY ACTIVE |
| KIKellsport Industries, INC | Fall River | MA | Chemical Manufacturing325998 | 1-19 | ◐ LIKELY ACTIVE |
| KMK & M Engineering, INC | Marlborough | MA | Fabricated Metal Product Manufacturing332313 | — | ◐ LIKELY ACTIVE |
| KIKtron Incorporated | Marlborough | MA | Fabricated Metal Product Manufacturing332811 | — | ◐ LIKELY ACTIVE |
| LMLab Medical Manufacturing INC | Billerica | MA | Miscellaneous Manufacturing339112 | — | ◐ LIKELY ACTIVE |
| LSLake Shore Cryotronics Woburn | Woburn | MA | Computer and Electronic Product Manufacturing334419 | 20-99 | ◐ LIKELY ACTIVE |
| LCLane Construction | Lee | MA | Petroleum and Coal Products Manufacturing324121 | — | ◐ LIKELY ACTIVE |
| LILase Innovation INC | Waltham | MA | Machinery Manufacturing333310 | — | ◐ LIKELY ACTIVE |
| LLLashway Lumber, INC. | Williamsburg | MA | Wood Product Manufacturing321113 | 20-99 | ◐ LIKELY ACTIVE |
| LPLilly's Pasta Group Corporation | Everett | MA | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| LBLine Bore Industries, INC. | Oxford | MA | Fabricated Metal Product Manufacturing332710 | 1-19 | ◐ LIKELY ACTIVE |
| LILista International INC | Holliston | MA | Fabricated Metal Product Manufacturing332216 | — | ◐ LIKELY ACTIVE |
| LPLiving Proof | Boston | MA | Chemical Manufacturing325611 | — | ◐ LIKELY ACTIVE |
| LILkm Industries, INC | Woburn | MA | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation | Andover | MA | Computer and Electronic Product Manufacturing334511 | — | ◐ LIKELY ACTIVE |
| LLLongcap Lamson Products | Westfield | MA | Fabricated Metal Product Manufacturing332211 | 20-99 | ◐ LIKELY ACTIVE |
| LHLookout Hard Cider | Natick | MA | Beverage and Tobacco Product Manufacturing312130 | 20-99 | ◐ LIKELY ACTIVE |