| AGAll Granite and Marble Corporation | Danbury | CT | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| AUAllnex Usa, INC Formerly Cytec Industries INC | Wallingford | CT | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| AWAlloy Welding | Bristol | CT | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| AWAlloy Welding | Plainville | CT | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| APAll Phase Steel Works, LLC | New Haven | CT | Fabricated Metal Product Manufacturing332323 | — | ◇ UNVERIFIED |
| APAll Phase Steel Works, LLC | Bridgeport | CT | Fabricated Metal Product Manufacturing332323 | — | ◇ UNVERIFIED |
| AIAltra Industrial Motion, INC. | New Hartford | CT | Machinery Manufacturing333612 | — | ◇ UNVERIFIED |
| AIAlvarez Industries LLC | Greenwich | CT | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| APAmbiance Painting, LLC | Norwalk | CT | Paper Manufacturing322220 | — | ◇ UNVERIFIED |
| ATAmerbelle Textiles LLC | Vernon | CT | Textile Mills313310 | — | ◇ UNVERIFIED |
| ACAmerican Coated Products | Clinton | CT | Miscellaneous Manufacturing339940 | — | ◇ UNVERIFIED |
| ACAmerican Connecticut Ring Binder, Index Tab & Printing Company, INC. | Washington | CT | Printing and Related Support Activities323119 | — | ◇ UNVERIFIED |
| AIAmerican Industries, INC. | West Haven | CT | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| AMAmerican Metal Fabricators, INC | Meriden | CT | Machinery Manufacturing333512 | — | ◇ UNVERIFIED |
| APAmerican Plastic Products, INC. | Waterbury | CT | Chemical Manufacturing325991 | — | ◇ UNVERIFIED |
| ASAmerican Standard Company, INC. | Southington | CT | Fabricated Metal Product Manufacturing332212 | — | ◇ UNVERIFIED |
| ASAmerican Stone Excellence, LLC | Wallingford | CT | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
 American Wire CORP | Sandy Hook | CT | Primary Metal Manufacturing331318 | — | ◇ UNVERIFIED |
| ASAmericas Styrenics, LLC | Ledyard | CT | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| AIAmodios, INC. | Waterbury | CT | Food Manufacturing311942 | — | ◇ UNVERIFIED |
| ACAmtec Corporation | Plainfield | CT | Fabricated Metal Product Manufacturing332618 | — | ◇ UNVERIFIED |
| AAAndrew and Cristin Robb | Derby | CT | Transportation Equipment Manufacturing336612 | — | ◇ UNVERIFIED |
| AIAnmar International, LTD | Bridgeport | CT | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
| AIAnodic Incorporated | Stevenson | CT | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| ACAnsonia Copper & Brass INC - Ansonia | Ansonia | CT | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| ACAnsonia Copper & Brass INC - Waterbury | Waterbury | CT | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| AMAOS Meriden, LLC | Meriden | CT | Machinery Manufacturing333310 | — | ◇ UNVERIFIED |
| AMApel Mill LLC | Manchester | CT | Wood Product Manufacturing321999 | — | ◇ UNVERIFIED |
| ALApplied Laser Solutions, INC | Danbury | CT | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| ASAptar Stratford | Stratford | CT | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| AAramsco | Wallingford | CT | Electrical Equipment, Appliance & Component Manufacturing335210 | — | ◇ UNVERIFIED |
| AGArchitectural Glass Pros, INC. | Winsted | CT | Nonmetallic Mineral Product Manufacturing327215 | — | ◇ UNVERIFIED |
| ATArgo Transdata CORP | Clinton | CT | Computer and Electronic Product Manufacturing334000 | — | ◇ UNVERIFIED |
| ABArista Beaver Brook Circuits INC | Bethel | CT | Computer and Electronic Product Manufacturing334412 | — | ◇ UNVERIFIED |
| ARArmster Reclaimed Lumber Company | Broad Brook | CT | Wood Product Manufacturing321918 | — | ◇ UNVERIFIED |
| AArtfxsigns | Waterford | CT | Miscellaneous Manufacturing339950 | — | ◇ UNVERIFIED |
| ASArtisan Stairs & Millwork Company | Manchester | CT | Furniture and Related Product Manufacturing337212 | — | ◇ UNVERIFIED |
| ALArtlook LLC | Shelton | CT | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| ASA. Silverio Asphalt Paving | Danbury | CT | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| ACA&t Communications, LLC | New Britain | CT | Electrical Equipment, Appliance & Component Manufacturing335921 | — | ◇ UNVERIFIED |
| AMAtlantic Manufacturing, INC. | Thomaston | CT | Fabricated Metal Product Manufacturing332116 | — | ◇ UNVERIFIED |
| AHAtlas Hobbing and Tool Company | Bridgeport | CT | Fabricated Metal Product Manufacturing332216 | — | ◇ UNVERIFIED |
| ACAtofina Chemicals INC Atoglas Div | Kensington | CT | Plastics and Rubber Products Manufacturing326113 | — | ◇ UNVERIFIED |
 Austin Powder Company | Sterling | CT | Chemical Manufacturing325920 | — | ◇ UNVERIFIED |
| ASAutomated Services, LLC | Milford | CT | Miscellaneous Manufacturing339932 | — | ◇ UNVERIFIED |
| APAutoswage Prods INC | Shelton | CT | Fabricated Metal Product Manufacturing332116 | — | ◇ UNVERIFIED |
| AAvatar | East Windsor | CT | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| ATAvenue T Brands, LLC | Fairfield | CT | Beverage and Tobacco Product Manufacturing312111 | — | ◇ UNVERIFIED |
| BMB3 Management Group, L.L.C. | Suffield | CT | Beverage and Tobacco Product Manufacturing312120 | — | ◇ UNVERIFIED |
| BBBagel Boys, INC. | Glastonbury | CT | Food Manufacturing311812 | — | ◇ UNVERIFIED |
