| RCRegal Cutting Tools Div Yg-1 CO LTD | South Beloit, IL | Machinery Manufacturing333515 | — | ◇ UNVERIFIED |
| RRRin Rockford Division of Rin INC | Rockford, IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| RDRoad Drs LLC | Belvidere, IL | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| RARockford American Plating | Rockford, IL | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| RCRockford Cement Products CO | Rockford, IL | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| RERockford Electric Equipment CO | Rockford, IL | Electrical Equipment, Appliance & Component Manufacturing335312 | — | ◇ UNVERIFIED |
| RFRockford Foundries | Rockford, IL | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| RIRockford Industrial Distribution Ctr | Rockford, IL | Chemical Manufacturing325991 | — | ◇ UNVERIFIED |
| RPRockford Products | Loves Park, IL | Fabricated Metal Product Manufacturing332722 | — | ◇ UNVERIFIED |
| RPRockford Products CORP | Rockford, IL | Fabricated Metal Product Manufacturing332722 | — | ◇ UNVERIFIED |
| RRRock Road CO INC | Belvidere, IL | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| RRRock Road Companies INC | Rockford, IL | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| RARockview Asphalt Plant | Rockford, IL | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| RRRogers Ready-mix & Materials INC | Rockford, IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| RPRoscoe Park Athletic Fields | Roscoe, IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| RRRoscoe Ready - Mix INC | Pecatonica, IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| RFRrb Fabrication INC | Rockton, IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| SPSonoco Product CO | Rockton, IL | Paper Manufacturing322130 | — | ◇ UNVERIFIED |
| SISouthern Imperial LLC | Rockford, IL | Fabricated Metal Product Manufacturing332618 | — | ◇ UNVERIFIED |
| SESpecial-t Engraving & Gifts | Rockford, IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| SSSpecialty Screw CORP | Rockford, IL | Fabricated Metal Product Manufacturing332722 | — | ◇ UNVERIFIED |
| SLState Line Foundries INC | Roscoe, IL | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| SESterling Engines | Rockford, IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| SISuntec Industries INC | Rockford, IL | Machinery Manufacturing333911 | — | ◇ UNVERIFIED |
| SCSuperior Coating CORP | Belvidere, IL | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| SRSwanson Robert | Belvidere, IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| TCTfs Commercial Solutions Group Raycarl Prods | Rockford, IL | Fabricated Metal Product Manufacturing332722 | — | ◇ UNVERIFIED |
| TFTh Foods INC | Loves Park, IL | Food Manufacturing311821 | — | ◇ UNVERIFIED |
| TCTioga Coatings CORP | Rockford, IL | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| TRTodd Reeverts | Rockford, IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| TPTony Pipiton | Shirland, IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| TATower Automotive | Rockford, IL | Transportation Equipment Manufacturing336000 | — | ◇ UNVERIFIED |
| TMTrd Manufacturing INC | Machesney Park, IL | Machinery Manufacturing333995 | — | ◇ UNVERIFIED |
| TPTreehouse Private Brands INC | South Beloit, IL | Food Manufacturing311812 | — | ◇ UNVERIFIED |
| TITrenwyth Industries | South Beloit, IL | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| TITrenwyth Industries | South Beloit, IL | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| TPTy Precision Automatics | Rockford, IL | Machinery Manufacturing333999 | — | ◇ UNVERIFIED |
| UIUnison Industries INC | Rockford, IL | Transportation Equipment Manufacturing336320 | — | ◇ UNVERIFIED |
| VSVestis Services, LLC | Rockford, IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| VPVickerman Products | South Beloit, IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| WPWaterford Property Management | Rockford, IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| WBWelch Brothers Belvidere INC | Belvidere, IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| WGWest Grant Dev INC | Rockton, IL | Transportation Equipment Manufacturing336412 | — | ◇ UNVERIFIED |
| WCWilliam Charles Const CO LLC Materials Div | Roscoe, IL | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| WCWilliam Charles Construction CO | Durand, IL | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| WCWilliam Charles Construction CO | Belvidere, IL | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| WLWindsor Lake North Ccdd | Loves Park, IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| AGAIRCRAFT GEAR CORPORATION - Plant 1 | Loves Park, IL | Transportation Equipment Manufacturing336390 | 20–99 | ◐ LIKELY ACTIVE |
| AGAIRCRAFT GEAR CORPORATION - Plant 2 | Rockford, IL | Transportation Equipment Manufacturing336350 | 20–99 | ◐ LIKELY ACTIVE |
| ACAmerican Control Electronics | South Beloit, IL | Computer and Electronic Product Manufacturing334418 | 20–99 | ◐ LIKELY ACTIVE |
