| FZF.c. Ziegler CO. | Pittsfield | ME | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| FMFiber Materials, INC. | Presque Isle | ME | Textile Mills313110 | — | ◇ UNVERIFIED |
| FGFlame Grilling Products, INC. | Waldoboro | ME | Wood Product Manufacturing321999 | — | ◇ UNVERIFIED |
| FDFlight Deck Properties, LLC | Brunswick | ME | Beverage and Tobacco Product Manufacturing312120 | — | ◇ UNVERIFIED |
| FMForce Manufacturing, INC. | Bangor | ME | Machinery Manufacturing333924 | — | ◇ UNVERIFIED |
| FSForgotten Stoneworks | Manchester | ME | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| FFFrenchville - Fraser Papers' Landfill | Frenchville | ME | Paper Manufacturing322120 | — | ◇ UNVERIFIED |
| FMFrost Mountain Woodshop | Brownfield | ME | Wood Product Manufacturing321999 | — | ◇ UNVERIFIED |
| GFGagne Foods | Bath | ME | Food Manufacturing311813 | — | ◇ UNVERIFIED |
| GSGds Services INC. | Bridgton | ME | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| GDGeneral Dynamics | Bath | ME | Transportation Equipment Manufacturing336611 | — | ◇ UNVERIFIED |
| GDGeneral Dynamics | Brunswick | ME | Transportation Equipment Manufacturing336611 | — | ◇ UNVERIFIED |
| GCGenest Concrete | Biddeford | ME | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| GCGenest Concrete Works INC - Berwick | Berwick | ME | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| GGG & G Products LLC | Springvale | ME | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| GLGlidden Lumber | Parkman | ME | Wood Product Manufacturing321113 | — | ◇ UNVERIFIED |
| GCGray Canvasworks LLC | Rockport | ME | Textile Product Mills314910 | — | ◇ UNVERIFIED |
| GMGreene Marine, INC. | Yarmouth | ME | Transportation Equipment Manufacturing336612 | — | ◇ UNVERIFIED |
| GPGreenstone Precast, LLC | New Gloucester | ME | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| GPGregoire Paving, Inc | Saco | ME | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| GBGriffin Bakery LLC | South Portland | ME | Food Manufacturing311811 | — | ◇ UNVERIFIED |
| GLGrimburg Less Lethal LC | Bridgton | ME | Fabricated Metal Product Manufacturing332994 | — | ◇ UNVERIFIED |
| GNGrindstone Neck of Maine, LLC | Winter Harbor | ME | Food Manufacturing311711 | — | ◇ UNVERIFIED |
| HMH2 Manufacturing LLC | Fairfield | ME | Transportation Equipment Manufacturing336212 | — | ◇ UNVERIFIED |
| HLHancock Lumber CO INC - Pittsfield | Pittsfield | ME | Wood Product Manufacturing321113 | — | ◇ UNVERIFIED |
| HLHancock Lumber Company, INC. - Bethel | Bethel | ME | Wood Product Manufacturing321113 | — | ◇ UNVERIFIED |
| HMHeide Martin Design Studio | Rockland | ME | Furniture and Related Product Manufacturing337122 | — | ◇ UNVERIFIED |
| HTHeiwa Tofu Inc. | Rockport | ME | Food Manufacturing311991 | — | ◇ UNVERIFIED |
| HHermon | Bangor | ME | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| HBHighland Belt & Fine Leather Goods | Brewer | ME | Leather and Allied Product Manufacturing316219 | — | ◇ UNVERIFIED |
| HVHill View Mini Barns | Hermon | ME | Wood Product Manufacturing321992 | — | ◇ UNVERIFIED |
| HRHissong Ready-mix & Aggregates, LLC | Westbrook | ME | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| HRHorn Run Brewing LLC | Perry | ME | Beverage and Tobacco Product Manufacturing312120 | — | ◇ UNVERIFIED |
| HCHoughton Cedar Products, INC. | Lee | ME | Wood Product Manufacturing321113 | — | ◇ UNVERIFIED |
 Huber Engineered Woods LLC | Ashland | ME | Wood Product Manufacturing321219 | — | ◇ UNVERIFIED |
| HBHughes Bros. INC. | Winterport | ME | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| HBHughtes Bros. Ellsworth Concr | Ellsworth | ME | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
 Hyperlite Mountain Gear | Biddeford | ME | Apparel Manufacturing315999 | — | ◇ UNVERIFIED |
| HCHyponex CORP | Medway | ME | Wood Product Manufacturing321999 | — | ◇ UNVERIFIED |
| IFIcebrand Foods, INC. | Portland | ME | Food Manufacturing311712 | — | ◇ UNVERIFIED |
| IGIdentity Group Holding CORP. | Scarborough | ME | Miscellaneous Manufacturing339950 | — | ◇ UNVERIFIED |
| IIIMBODHI Inc | Falmouth | ME | Apparel Manufacturing315240 | — | ◇ UNVERIFIED |
| IFInland Fresh Seafood Corporation of America, INC. | South Portland | ME | Food Manufacturing311710 | — | ◇ UNVERIFIED |
| IMInnovative Machining Solutions Inc. | Vienna | ME | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| IPInsightful Products, LLC | Scarborough | ME | Miscellaneous Manufacturing339113 | — | ◇ UNVERIFIED |
| ISIn Stainless Steel Specialist | Hampden | ME | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| IBInterstate Brands Dba Hostess Brands | Biddeford | ME | Food Manufacturing311812 | — | ◇ UNVERIFIED |
| IFIrving Forest Products, INC. | Masardis | ME | Wood Product Manufacturing321113 | — | ◇ UNVERIFIED |
| IIIrwin Industrial Tool | Gorham | ME | Fabricated Metal Product Manufacturing332721 | — | ◇ UNVERIFIED |
| ITIrwin Tools | Gorham | ME | Fabricated Metal Product Manufacturing332212 | — | ◇ UNVERIFIED |
