| RTRocket Twins, LLC | Chicago | IL | Food Manufacturing311920 | — | ◇ UNVERIFIED |
| RRRock Recycling INC | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| RMRoscoe Metal Finishing | Chicago | IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| RPRose Pest Control @ Ohare Intl Airport | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| RERoyal Envelope CORP. | Chicago | IL | Paper Manufacturing322213 | — | ◇ UNVERIFIED |
| RERra Enterprises, LLC | Chicago | IL | Fabricated Metal Product Manufacturing332722 | — | ◇ UNVERIFIED |
| RRR & R Display Inc. | Chicago | IL | Furniture and Related Product Manufacturing337215 | — | ◇ UNVERIFIED |
| RMR&s Minimart | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| RIRtc Industries INC | Chicago | IL | Miscellaneous Manufacturing339950 | — | ◇ UNVERIFIED |
| RTR & T Gas & Food INC | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| RMRubens & Marble INC | Chicago | IL | Textile Mills313310 | — | ◇ UNVERIFIED |
| RTRyder Transportation Serv 0323 | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| SLSabin LLC | Chicago | IL | Electrical Equipment, Appliance & Component Manufacturing335122 | — | ◇ UNVERIFIED |
| SASafway Atlantic LLC | Chicago | IL | Machinery Manufacturing333921 | — | ◇ UNVERIFIED |
| SASalvation Army | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| SLSamcakes, LLC | Chicago | IL | Food Manufacturing311813 | — | ◇ UNVERIFIED |
| SESandhu Enterprises INC | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| SPSandhu Petroleum CORP | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| SLSara Lee Coffee & Tea Food Service | Chicago | IL | Food Manufacturing311920 | — | ◇ UNVERIFIED |
| SSSavage Services CORP | Chicago | IL | Chemical Manufacturing325180 | — | ◇ UNVERIFIED |
| SISensaphonics, Inc. | Chicago | IL | Computer and Electronic Product Manufacturing334290 | — | ◇ UNVERIFIED |
| SISetna IO | Chicago | IL | Transportation Equipment Manufacturing336411 | — | ◇ UNVERIFIED |
| SCSeven-d Construction | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| SCShantara Corporation Bp | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| SShell | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| SShell | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| SSSide Street Golf LLC | Chicago | IL | Miscellaneous Manufacturing339920 | — | ◇ UNVERIFIED |
| SSign-A-Rama | Chicago | IL | Miscellaneous Manufacturing339950 | — | ◇ UNVERIFIED |
| SISignco, INC. | Chicago | IL | Miscellaneous Manufacturing339950 | — | ◇ UNVERIFIED |
| SSSilvia Statuary | Chicago | IL | Nonmetallic Mineral Product Manufacturing327110 | — | ◇ UNVERIFIED |
| SMSims Metals Aka Metal Management INC | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| SSSinger Safety Company | Chicago | IL | Fabricated Metal Product Manufacturing332311 | — | ◇ UNVERIFIED |
| SNSip North Stetson Venture LLC | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| SCSka Chicago INC | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| SCSkyway Cement CO LLC | Chicago | IL | Nonmetallic Mineral Product Manufacturing327992 | — | ◇ UNVERIFIED |
| SASlidematic Acquisition, LLC Dba Slidematic Products | Chicago | IL | Fabricated Metal Product Manufacturing332119 | — | ◇ UNVERIFIED |
| SMSMH2 Manufacturing LLC | Chicago | IL | Food Manufacturing311999 | — | ◇ UNVERIFIED |
| SCSnappy Conveniece Center 4 | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| SCSnappy Convenience Center 7 | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| SCSoa Car Wash | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| SCSolo Cup CO | Chicago | IL | Paper Manufacturing322215 | — | ◇ UNVERIFIED |
| SSSouth Shore Iron Works | Chicago | IL | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| SASouthwest Area High School | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| SCStarbucks Chicago Roastery | Chicago | IL | Food Manufacturing311920 | — | ◇ UNVERIFIED |
| SCStar Car Wash | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| SGStar-Tech Glass, Inc. | Chicago | IL | Nonmetallic Mineral Product Manufacturing327215 | — | ◇ UNVERIFIED |
| STStarwise Therapeutics LLC | Chicago | IL | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
| SRSteep Ravine Brewing Company Chicago LLC | Chicago | IL | Beverage and Tobacco Product Manufacturing312120 | — | ◇ UNVERIFIED |
 Sterling Spring, L.l.c | Chicago | IL | Fabricated Metal Product Manufacturing332611 | — | ◇ UNVERIFIED |
| SJSt Jude Oil Group INC | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
