| FCFluid Control Solutions, LLC | Plainville | CT | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| FAForce Automation, Inc. | Bristol | CT | Transportation Equipment Manufacturing336412 | — | ◇ UNVERIFIED |
| FMForrest Machine, INC. | Rocky Hill | CT | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| FIFranklin Impressions, LLC | Norwich | CT | Printing and Related Support Activities323119 | — | ◇ UNVERIFIED |
| FHFright Haven, LLC | Stratford | CT | Machinery Manufacturing333318 | — | ◇ UNVERIFIED |
| FAFritz Air, LLC | Torrington | CT | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| FCFrontier Communications | Winsted | CT | Computer and Electronic Product Manufacturing334220 | — | ◇ UNVERIFIED |
| FOFurniture Origins | West Haven | CT | Furniture and Related Product Manufacturing337122 | — | ◇ UNVERIFIED |
| FSFurniture Solutions, LLC | Wallingford | CT | Wood Product Manufacturing321999 | — | ◇ UNVERIFIED |
| FPFusion Paperboard Connecticut LLC | Sprague | CT | Paper Manufacturing322130 | — | ◇ UNVERIFIED |
| FIFutureswiss International LLC | Thomaston | CT | Machinery Manufacturing333515 | — | ◇ UNVERIFIED |
| GPGateway Plastics & Molding, INC. | Rocky Hill | CT | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| GCGe CO | Plainville | CT | Electrical Equipment, Appliance & Component Manufacturing335313 | — | ◇ UNVERIFIED |
| GHGelato Haven, LLC | New Haven | CT | Food Manufacturing311520 | — | ◇ UNVERIFIED |
| GCGeneral Cable Industries | Dayville | CT | Primary Metal Manufacturing331422 | — | ◇ UNVERIFIED |
| GFGeneral Fabricators, INC | Stamford | CT | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| GFGeomatrix Fabrication, LLC | Hamden | CT | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| GPGezelman Partners, LLC | West Hartford | CT | Nonmetallic Mineral Product Manufacturing327215 | — | ◇ UNVERIFIED |
| GMGiordano Monuments LLC | West Haven | CT | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| GFGivaudan Flavors CORP | New Milford | CT | Food Manufacturing311423 | — | ◇ UNVERIFIED |
| GAGkn Aerospace Services Structures | Wallingford | CT | Transportation Equipment Manufacturing336412 | — | ◇ UNVERIFIED |
| GHGlasco Heating & Air Conditioning, INC. | South Windsor | CT | Fabricated Metal Product Manufacturing332322 | — | ◇ UNVERIFIED |
| GIGlass Industries, USA LLC | Wallingford | CT | Nonmetallic Mineral Product Manufacturing327215 | — | ◇ UNVERIFIED |
| GLG L C Associates | Thomaston | CT | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| GMGmt Manufacturing Company, INC. | Plantsville | CT | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| GPGoodcopy Printing Center, INC. | New Haven | CT | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| GPGoodrich Pump & Engine Control Sys INC | West Hartford | CT | Transportation Equipment Manufacturing336412 | — | ◇ UNVERIFIED |
| GSGood Sports, INC. | Manchester | CT | Printing and Related Support Activities323113 | — | ◇ UNVERIFIED |
| GTGoodway Technologies Corporation | Stamford | CT | Machinery Manufacturing333318 | — | ◇ UNVERIFIED |
| GHGrant Huffman Designs CO | Wallingford | CT | Furniture and Related Product Manufacturing337110 | — | ◇ UNVERIFIED |
| GBGray's Bridge Farm & Earth Products, LLC | Brookfield | CT | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| GFGreat Falls Brewing Company, LLC | Canaan | CT | Beverage and Tobacco Product Manufacturing312120 | — | ◇ UNVERIFIED |
| GTGregor Technologies, LLC | Torrington | CT | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| GEGreystone Enterprises I, Inc. | North Haven | CT | Machinery Manufacturing333310 | — | ◇ UNVERIFIED |
 Griffin Welding LLC | Newtown | CT | Machinery Manufacturing333992 | — | ◇ UNVERIFIED |
| HPHanson Pipe & Precast, INC. | Wauregan | CT | Nonmetallic Mineral Product Manufacturing327332 | — | ◇ UNVERIFIED |
| HBHarvest Bakery Inc | Bristol | CT | Food Manufacturing311811 | — | ◇ UNVERIFIED |
| HAH & A Steel LLC | Brooklyn | CT | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| HBH B Ives CO (harrow Products) | New Haven | CT | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| HCHCH Collaborative Inc | New Milford | CT | Apparel Manufacturing315990 | — | ◇ UNVERIFIED |
| HIHdb, INC. | Winsted | CT | Fabricated Metal Product Manufacturing332510 | — | ◇ UNVERIFIED |
| HCHeico Corporation | Glastonbury | CT | Transportation Equipment Manufacturing336412 | — | ◇ UNVERIFIED |
| HPHeleniak Properties, LLC | Plainville | CT | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| HCHenkel Corporation | Waterford | CT | Petroleum and Coal Products Manufacturing324191 | — | ◇ UNVERIFIED |
| HCHenry CO #tq3 | Fairfield | CT | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| HGH. Goodmaster & Son INC | Wallingford | CT | Machinery Manufacturing333998 | — | ◇ UNVERIFIED |
| HHH & H Printing | Stratford | CT | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| HOHicks & Otis Prints INC | Norwalk | CT | Plastics and Rubber Products Manufacturing326130 | — | ◇ UNVERIFIED |
| HMHighland Manufacturing Inc. | Manchester | CT | Machinery Manufacturing333912 | — | ◇ UNVERIFIED |
| HWHighland Woodcraft, LLC | Prospect | CT | Wood Product Manufacturing321999 | — | ◇ UNVERIFIED |
