| TETownley Engineering & Manufacturing Co., Inc. (Illinois Plant) | Eldorado | IL | Plastics and Rubber Products Manufacturing326220 | 1-19 | ◐ LIKELY ACTIVE |
| TPTribute Precast Systems | Freeport | IL | Nonmetallic Mineral Product Manufacturing327390 | 1-19 | ◐ LIKELY ACTIVE |
| TNTRIPAC North America LLC - Rockford | Rockford | IL | Wood Product Manufacturing321920 | 1-19 | ◐ LIKELY ACTIVE |
| USUnited Scrap | Cicero | IL | Primary Metal Manufacturing331491 | 1-19 | ◐ LIKELY ACTIVE |
| UUrbana | Urbana | IL | Food Manufacturing311991 | 1-19 | ◐ LIKELY ACTIVE |
| UDUSMe DBA BLH Computers | Springfield | IL | Primary Metal Manufacturing331491 | 1-19 | ◐ LIKELY ACTIVE |
| UTU.S. Truss Company - Springfield | Springfield | IL | Wood Product Manufacturing321214 | 1-19 | ◐ LIKELY ACTIVE |
| VMValent Mid-West Agricultural Research Center (MWARC) | Seymour | IL | Chemical Manufacturing325320 | 1-19 | ◐ LIKELY ACTIVE |
| VSVB Spine Chicago | Itasca | IL | Miscellaneous Manufacturing339113 | 1-19 | ◐ LIKELY ACTIVE |
| WIWemco INC | Alsip | IL | Fabricated Metal Product Manufacturing332710 | 1-19 | ◐ LIKELY ACTIVE |
| WCWhitesell Corporation Chicago | Chicago | IL | Machinery Manufacturing333921 | 1-19 | ◐ LIKELY ACTIVE |
| WBWILLE BROTHERS COMPANY- Lemont Ready Mix Plant | Lemont | IL | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| WCWIMAN Corporation - Dupo | Dupo | IL | Plastics and Rubber Products Manufacturing326113 | 1-19 | ◐ LIKELY ACTIVE |
| WUWittmann U.S.A. Inc | South Elgin | IL | Machinery Manufacturing333249 | 1-19 | ◐ LIKELY ACTIVE |
| WWtp | Chicago | IL | Food Manufacturing311340 | 1-19 | ◐ LIKELY ACTIVE |
| YTYokohama TWS Bensenville, IL | Bensenville | IL | Plastics and Rubber Products Manufacturing326211 | 1-19 | ◐ LIKELY ACTIVE |
| 1S11th Street Express Printing, Inc. | Rockford | IL | Printing and Related Support Activities323111 | 1-19 | ◇ UNVERIFIED |
| AAAabbitt Adhesives, INC. | Chicago | IL | Chemical Manufacturing325520 | 1-19 | ◇ UNVERIFIED |
| AMAbbey Metal Services, INC | Chicago | IL | Fabricated Metal Product Manufacturing332999 | 1-19 | ◇ UNVERIFIED |
| AGAccurate Grinding | Posen | IL | Fabricated Metal Product Manufacturing332710 | 1-19 | ◇ UNVERIFIED |
| AMAccurate Metal Finishing CO | Gilberts | IL | Miscellaneous Manufacturing339999 | 1-19 | ◇ UNVERIFIED |
| APAce Plastic Inc. | Bloomington | IL | Chemical Manufacturing325211 | 1-19 | ◇ UNVERIFIED |
| APAction Pump Co. | Cary | IL | Fabricated Metal Product Manufacturing332312 | 1-19 | ◇ UNVERIFIED |
| AIAde, INC. | Chicago | IL | Plastics and Rubber Products Manufacturing326140 | 1-19 | ◇ UNVERIFIED |
| APAdrenaline Prints, LLC | Belleville | IL | Printing and Related Support Activities323113 | 1-19 | ◇ UNVERIFIED |
| AMAdvanced Machining CORP | Bensenville | IL | Fabricated Metal Product Manufacturing332710 | 1-19 | ◇ UNVERIFIED |
| ASAdvanced Security Group INC | Chicago | IL | Fabricated Metal Product Manufacturing332510 | 1-19 | ◇ UNVERIFIED |
| AIAffordable Interiors, Incorporated | Grayslake | IL | Furniture and Related Product Manufacturing337110 | 1-19 | ◇ UNVERIFIED |
| ASAkhan Semiconductor INC | Gurnee | IL | Computer and Electronic Product Manufacturing334413 | 1-19 | ◇ UNVERIFIED |
| AIAldonex INC | Bellwood | IL | Miscellaneous Manufacturing339999 | 1-19 | ◇ UNVERIFIED |
| AIAlecto Industries Inc. | Maywood | IL | Fabricated Metal Product Manufacturing332710 | 1-19 | ◇ UNVERIFIED |
| AMAll Metal Solutions, INC | Chicago | IL | Machinery Manufacturing333999 | 1-19 | ◇ UNVERIFIED |
| ARAll Right Sign INC | Steger | IL | Miscellaneous Manufacturing339999 | 1-19 | ◇ UNVERIFIED |
| AFAllwood Flooring Products, Inc | Wauconda | IL | Wood Product Manufacturing321215 | 1-19 | ◇ UNVERIFIED |
| AIAlply Insulated Panels, LLC | Litchfield | IL | Fabricated Metal Product Manufacturing332311 | 1-19 | ◇ UNVERIFIED |
| AIAlr Incorporated | Lincolnshire | IL | Transportation Equipment Manufacturing336111 | 1-19 | ◇ UNVERIFIED |
| AAAmerican Acrylics LLC | Skokie | IL | Food Manufacturing311812 | 1-19 | ◇ UNVERIFIED |
| ACAmerican Cylinder Co., Inc. | Peotone | IL | Machinery Manufacturing333995 | 1-19 | ◇ UNVERIFIED |
| AMAmerican Machine INC | Mendota | IL | Miscellaneous Manufacturing339999 | 1-19 | ◇ UNVERIFIED |
| APA.M. Project Consulting, Inc. | Loves Park | IL | Fabricated Metal Product Manufacturing332813 | 1-19 | ◇ UNVERIFIED |
| AIArquilla, Inc | Crystal Lake | IL | Computer and Electronic Product Manufacturing334517 | 1-19 | ◇ UNVERIFIED |
| ACArt Casting of Illinois INC | Oregon | IL | Miscellaneous Manufacturing339999 | 1-19 | ◇ UNVERIFIED |
| AEArtistry Engraving and Embossing | Chicago | IL | Miscellaneous Manufacturing339999 | 1-19 | ◇ UNVERIFIED |
| ASAsl Solutions INC | Sainte Marie | IL | Plastics and Rubber Products Manufacturing326199 | 1-19 | ◇ UNVERIFIED |
| AMAtlas Manufacturing LTD. | Harvard | IL | Fabricated Metal Product Manufacturing332710 | 1-19 | ◇ UNVERIFIED |
| ABAtomic Brands, Inc. | Barrington | IL | Beverage and Tobacco Product Manufacturing312140 | 1-19 | ◇ UNVERIFIED |
| AIAwesomecampaigns.com INC. | Elgin | IL | Printing and Related Support Activities323119 | 1-19 | ◇ UNVERIFIED |
| AAAWMCO Acquisition, LLC | Orland Park | IL | Nonmetallic Mineral Product Manufacturing327310 | 1-19 | ◇ UNVERIFIED |
| BCBakesweet CORP. | Lincolnwood | IL | Food Manufacturing311811 | 1-19 | ◇ UNVERIFIED |
| BPBarrol Printing, Inc. | Cherry Valley | IL | Printing and Related Support Activities323111 | 1-19 | ◇ UNVERIFIED |