| MUMauser USA LLC | Chicago | — | ◇ UNVERIFIED |
| MFMidwest Fibre Products, INC. | Viola | — | ◇ UNVERIFIED |
| MPMidwest Packaging & Container, INC. | Machesney Park | — | ◇ UNVERIFIED |
| MCMiller Container CORP. | Rock Island | — | ◇ UNVERIFIED |
| MCMiller Container INC | Rock Island | — | ◇ UNVERIFIED |
| MSMps Sea Converting INC | Wood Dale | — | ◇ UNVERIFIED |
| NCNorkol Converting Corporation | Northlake | — | ◇ UNVERIFIED |
| PCPackaging CORP of America | Bedford Park | — | ◇ UNVERIFIED |
| PCPackaging Corporation of America | Mundelein | — | ◇ UNVERIFIED |
| PCPackaging Corporation of America Dba Pca-chicago Container | Bedford Park | — | ◇ UNVERIFIED |
| PDPackaging Dynamics Dba Bagcraft Papercon | Chicago | — | ◇ UNVERIFIED |
| PLPap-r-tainer, LLC | Casey | — | ◇ UNVERIFIED |
| PBPca - Bedford Park | Bedford Park | — | ◇ UNVERIFIED |
| PSPersonnel Staffing Group, LLC Dba Most Valuable Personnel | Bellwood | — | ◇ UNVERIFIED |
| PPPolyair Packaging CORP | Chicago | — | ◇ UNVERIFIED |
| PHPregis Holding Ii Corporation | — | — | ◇ UNVERIFIED |
| PPrint-o-tape | Mundelein | — | ◇ UNVERIFIED |
| PSProfessional Sales Associates, Inc. | Wauconda | — | ◇ UNVERIFIED |
| QQuestcor | Bedford Park | — | ◇ UNVERIFIED |
| RPRavenRook Publishing, LLC | Chicago | — | ◇ UNVERIFIED |
| RTRon's Temporary Help Services, INC. | Bellwood | — | ◇ UNVERIFIED |
| RBRoyal Box Group, LLC | Bellwood | — | ◇ UNVERIFIED |
| RERoyal Envelope CORP. | Chicago | — | ◇ UNVERIFIED |
| SGS & G Packaging LLC | Plainfield | — | ◇ UNVERIFIED |
| SCSisco Corporation | Nashville | — | ◇ UNVERIFIED |
| SCSmurfit-stone Container Enterprises INC | Galesburg | — | ◇ UNVERIFIED |
| SCSolo Cup CO | Chicago | — | ◇ UNVERIFIED |
 Sonoco Products Company | Rockton | — | ◇ UNVERIFIED |
| SCStone Container CORP | Bloomington | — | ◇ UNVERIFIED |
| SGStrive Group LLC | Chicago | — | ◇ UNVERIFIED |
| THTerrace Holding Company | Cicero | — | ◇ UNVERIFIED |
| TPTerrace Paper Co., INC. | Cicero | — | ◇ UNVERIFIED |
| TTTL Trand Group LLC | Alsip | — | ◇ UNVERIFIED |
| TETranso Envelope CO LLC | Chicago | — | ◇ UNVERIFIED |
| TLTrimaco, LLC | Itasca | — | ◇ UNVERIFIED |
| TPTriumph Packaging | Lake Forest | — | ◇ UNVERIFIED |
| UEUnique Envelope CO. | Chicago | — | ◇ UNVERIFIED |
| UFUnited Food Ingredients, Inc. | Willowbrook | — | ◇ UNVERIFIED |
| USU.s. Specialty Packaging, INC. | Aurora | — | ◇ UNVERIFIED |
| WCWabash Container Corporation | Mount Carmel | — | ◇ UNVERIFIED |
| WPWelch Packaging Chicago, INC. | Countryside | — | ◇ UNVERIFIED |
| WBWertheimer Box & Paper Corporation | Mccook | — | ◇ UNVERIFIED |
| WCWestrock Company | New Lenox | — | ◇ UNVERIFIED |
| WCWestrock Converting Company | Aurora | — | ◇ UNVERIFIED |
| WCWestrock Cp, LLC | Highland | — | ◇ UNVERIFIED |
| WLWJ Larsen Properties LLC | Batavia | — | ◇ UNVERIFIED |
| ZIZKL Investments LLC | Lake Zurich | — | ◇ UNVERIFIED |
