| SIStarterpanel INC. | Machesney Park, IL | Electrical Equipment, Appliance & Component Manufacturing335313 | — | ◇ UNVERIFIED |
| SCStateline Cremations | Loves Park, IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| SSSunrise Southwest Rockford | Rockford, IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| SMSuperior Metal Finishing, INC. | Loves Park, IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| SPSuper Pantry 34 | Rockford, IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| SPSuper Pantry 47 | Rockford, IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| SSupplycore | Rockford, IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| TFTextron Fastening Systems INC | Rockford, IL | Fabricated Metal Product Manufacturing332722 | — | ◇ UNVERIFIED |
| TLTha Lad CO | Rockford, IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| TEThomas Engineering INC. | Rockford, IL | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| TSThompson Signs | Rockford, IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| TTollway | Loves Park, IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| TCTorrington CO | Rockford, IL | Fabricated Metal Product Manufacturing332991 | — | ◇ UNVERIFIED |
| TFTri-dim Filter Corporation | Belvidere, IL | Transportation Equipment Manufacturing336111 | — | ◇ UNVERIFIED |
| TSTruck Stop | Rockford, IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| UIUltra Ii Portable Asphalt Plant | Belvidere, IL | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| UTUnited Tooler of Illinois | Loves Park, IL | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| UOUsdol Osha- North Aurora | Kingston, IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| UOUsdol Osha- North Aurora | Belvidere, IL | Plastics and Rubber Products Manufacturing326299 | — | ◇ UNVERIFIED |
| UOUsdol Osha- North Aurora | Rockford, IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| UOUsdol Osha- North Aurora | South Beloit, IL | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| UOUsdol Osha- North Aurora | Rockford, IL | Fabricated Metal Product Manufacturing332439 | — | ◇ UNVERIFIED |
| UOUsdol Osha- North Aurora | Loves Park, IL | Computer and Electronic Product Manufacturing334511 | — | ◇ UNVERIFIED |
| UOUsdol Osha- North Aurora | South Beloit, IL | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| VCValley Custom Woodwork INC. | Belvidere, IL | Furniture and Related Product Manufacturing337212 | — | ◇ UNVERIFIED |
| VBVentra Belvidere LLC | Belvidere, IL | Transportation Equipment Manufacturing336111 | — | ◇ UNVERIFIED |
| VEVentures Ed | Rockford, IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| VDVinces Depot | Loves Park, IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| WVWema Vogtland America, LLC | Belvidere, IL | Machinery Manufacturing333512 | — | ◇ UNVERIFIED |
| WCWilliam Charles Construction CO | Loves Park, IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| WTWilson Tool Corporation | Rockford, IL | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| WCWingfoot Commercial Tire Systems LLC | Rockford, IL | Plastics and Rubber Products Manufacturing326212 | — | ◇ UNVERIFIED |
| WCWinnebago Corners Mart | Winnebago, IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| WCWinnebago County Ethanol Plant | Rockford, IL | Chemical Manufacturing325193 | — | ◇ UNVERIFIED |
| WRWinnebago Rng Plant | Rockford, IL | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| WCWorld Contract Packagers INC. | South Beloit, IL | Plastics and Rubber Products Manufacturing326111 | — | ◇ UNVERIFIED |
| XFXcel Foam & Packaging LLC | Rockford, IL | Plastics and Rubber Products Manufacturing326140 | — | ◇ UNVERIFIED |
| YUYanfeng US Automotive Interior Systems I LLC | Belvidere, IL | Transportation Equipment Manufacturing336360 | — | ◇ UNVERIFIED |
| ZFZip Fasteners Products, INC. | Rockford, IL | Fabricated Metal Product Manufacturing332722 | — | ◇ UNVERIFIED |