| AEAmway Extraction and Concentration Facility | Quincy | WA | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
| MTManchester Tank & Equipment CO | Quincy | IL | Fabricated Metal Product Manufacturing332420 | — | ◇ UNVERIFIED |
| MPMidwest Patterns INC | Quincy | IL | Fabricated Metal Product Manufacturing332997 | — | ◇ UNVERIFIED |
| PAPrince Agri Products INC | Quincy | IL | Food Manufacturing311119 | — | ◇ UNVERIFIED |
| PMPrince Minerals INC | Quincy | IL | Chemical Manufacturing325130 | — | ◇ UNVERIFIED |
| FEFeeleys Enameling CO INC | Quincy | MA | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| RBRack Builders INC | Quincy | IL | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| SSSouth Shore Plating Company Incorporated | Quincy | MA | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| ABAccess Business Group LLC Quincy | Quincy | WA | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
| ADAcore Door CO | Quincy | MI | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| AAAdm Alliance Nutrition INC | Quincy | IL | Food Manufacturing311119 | — | ◇ UNVERIFIED |
| AAAdm Alliance Nutrition INC | Quincy | IL | Food Manufacturing311119 | — | ◇ UNVERIFIED |
| BRBleigh Ready Mix CO | Quincy | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| BGBoston Gear Division | Quincy | MA | Machinery Manufacturing333612 | — | ◇ UNVERIFIED |
| BABpb America INC | Quincy | IL | Apparel Manufacturing315210 | — | ◇ UNVERIFIED |
| CDCpm Development Corporation Quincy | Quincy | WA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| FIFarmway Implement INC | Quincy | WA | Machinery Manufacturing333111 | — | ◇ UNVERIFIED |
| FMFinish Master Plating | Quincy | IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| FRFore River Shipment & Iron Works INC | Quincy | MA | Chemical Manufacturing325311 | — | ◇ UNVERIFIED |
| GCGem City Concrete LLC | Quincy | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| GUGrove US LLC | Quincy | PA | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| HIHigdon Industries INC | Quincy | FL | Furniture and Related Product Manufacturing337122 | — | ◇ UNVERIFIED |
| IPImerys Perlite Usa, INC | Quincy | FL | Nonmetallic Mineral Product Manufacturing327992 | — | ◇ UNVERIFIED |
| IHIndustrial Heat Treating INC | Quincy | MA | Fabricated Metal Product Manufacturing332811 | — | ◇ UNVERIFIED |
| KPKonstant Products INC | Quincy | IL | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| MCMathewson Corporation | Quincy | MA | Machinery Manufacturing333618 | — | ◇ UNVERIFIED |
| MFMwra Fore River Staging Area | Quincy | MA | Chemical Manufacturing325311 | — | ◇ UNVERIFIED |
| PPPrecision Plating of Quincy INC | Quincy | IL | Fabricated Metal Product Manufacturing332313 | — | ◇ UNVERIFIED |
| PAPrince Agri Products INC | Quincy | IL | Food Manufacturing311119 | — | ◇ UNVERIFIED |
| PMPrince Minerals INC | Quincy | IL | Food Manufacturing311119 | — | ◇ UNVERIFIED |
| PMPrince Minerals INC | Quincy | IL | Chemical Manufacturing325130 | — | ◇ UNVERIFIED |
| PHPrinting House INC | Quincy | FL | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| QCQuincy Castings, INC. | Quincy | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| QFQuincy Farm Products - Illinois - Quincy | Quincy | IL | Machinery Manufacturing333912 | — | ◇ UNVERIFIED |
| QJQuincy Joist Company | Quincy | FL | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| QPQuincy Products | Quincy | MI | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| QRQuincy Ready Mix INC | Quincy | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| RERaytheon Electronic | Quincy | MA | Machinery Manufacturing333999 | — | ◇ UNVERIFIED |
| RERichards Electric Motor CO | Quincy | IL | Electrical Equipment, Appliance & Component Manufacturing335314 | — | ◇ UNVERIFIED |
 Sierra Pacific Industries | Quincy | CA | Wood Product Manufacturing321113 | — | ◇ UNVERIFIED |
| SRSmyrna Ready Mix - Plant #130 | Quincy | FL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| THThe Huck Group INC | Quincy | IL | Furniture and Related Product Manufacturing337110 | — | ◇ UNVERIFIED |
| TCThomas Carrigg & Son | Quincy | MA | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| TCTrinity Containers LLC | Quincy | IL | Printing and Related Support Activities323122 | — | ◇ UNVERIFIED |
| TTrulieve | Quincy | FL | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
| UMUltra Maritime Naval Systems and Sensors | Quincy | MA | Computer and Electronic Product Manufacturing334511 | — | ◇ UNVERIFIED |
| UPUnited Parcel Service | Quincy | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| WCWestmin CORP | Quincy | IL | Food Manufacturing311119 | — | ◇ UNVERIFIED |
| RPR P & G of Quincy, INC. | Quincy | IL | Fabricated Metal Product Manufacturing332116 | — | ◇ UNVERIFIED |
| WPWa317948295 - Pioneer Metal Works | Quincy | WA | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
