| APAkra Plastic Products INC | Ontario | CA | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| APAkra Plastic Products INC | Ontario | CA | Plastics and Rubber Products Manufacturing326130 | — | ◇ UNVERIFIED |
| AMAks Machine INC | Ontario | CA | Machinery Manufacturing333514 | — | ◇ UNVERIFIED |
| AMAlbert Max, Inc. | Ontario | CA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| ALAlfa Leisure, INC. | Ontario | CA | Transportation Equipment Manufacturing336213 | — | ◇ UNVERIFIED |
| AWAlisha's Web | Ontario | CA | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| AIAlltech INC | Ontario | CA | Food Manufacturing311119 | — | ◇ UNVERIFIED |
| AFAmerican Fleet & Retail Graphics Dba the Amgraph Group | Ontario | CA | Printing and Related Support Activities323119 | — | ◇ UNVERIFIED |
| AMAmerican Manufacture Company, a California corporation | Ontario | CA | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| AIAmp INC | Ontario | CA | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| AIAmrep INC | Ontario | CA | Transportation Equipment Manufacturing336211 | — | ◇ UNVERIFIED |
| AEApi Engineering | Ontario | CA | Electrical Equipment, Appliance & Component Manufacturing335312 | — | ◇ UNVERIFIED |
| APA Plus Signs Llc, Dba Encore Image Signs | Ontario | CA | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| AA-p-m-d-cls-inc | Ontario | CA | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| ATAqua Tri | Ontario | CA | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| ADAragonesas Delsa | Ontario | CA | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| ACArmando Chavira Dba Industrial Equipment | Ontario | CA | Transportation Equipment Manufacturing336211 | — | ◇ UNVERIFIED |
| APArmorcast Products CO | Ontario | CA | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| AIArral Ind | Ontario | CA | Machinery Manufacturing333415 | — | ◇ UNVERIFIED |
| ATArrow Truck Bodies & Equip INC | Ontario | CA | Transportation Equipment Manufacturing336211 | — | ◇ UNVERIFIED |
| AFArt's Forklift Repair INC | Ontario | CA | Machinery Manufacturing333924 | — | ◇ UNVERIFIED |
| ADAstro Display Company INC | Ontario | CA | Furniture and Related Product Manufacturing337215 | — | ◇ UNVERIFIED |
| ACAtrium Corporation Dba Superior Windows & Doors | Ontario | CA | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| ASAvalon Shutters INC | Ontario | CA | Wood Product Manufacturing321911 | — | ◇ UNVERIFIED |
| ADAxxess Door, Corp. | Ontario | CA | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| ACAz Countertops, INC | Ontario | CA | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| ACAz Countertops, INC. | Ontario | CA | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| ABAzteca's Bakery | Ontario | CA | Food Manufacturing311811 | — | ◇ UNVERIFIED |
| BPBakery Pan Services INC. | Ontario | CA | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| BCBausman & CO | Ontario | CA | Furniture and Related Product Manufacturing337215 | — | ◇ UNVERIFIED |
| BCBausman & Company | Ontario | CA | Furniture and Related Product Manufacturing337122 | — | ◇ UNVERIFIED |
| BCBausman & Company | Ontario | CA | Furniture and Related Product Manufacturing337122 | — | ◇ UNVERIFIED |
| BCBci Coca-cola Bottling Company of Los Angeles | Ontario | CA | Beverage and Tobacco Product Manufacturing312111 | — | ◇ UNVERIFIED |
| BDB & D Litho California INC | Ontario | CA | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| BSBear State Pump & Equip CORP | Ontario | CA | Machinery Manufacturing333911 | — | ◇ UNVERIFIED |
| BEB E D Solutions L L C | Ontario | CA | Miscellaneous Manufacturing339910 | — | ◇ UNVERIFIED |
| BVBeer Valley Brewing Company, LLC | Ontario | OR | Beverage and Tobacco Product Manufacturing312120 | — | ◇ UNVERIFIED |
| BIBertolini Incorporated | Ontario | CA | Machinery Manufacturing333994 | — | ◇ UNVERIFIED |
| BIBest Ink and Thread | Ontario | CA | Printing and Related Support Activities323113 | — | ◇ UNVERIFIED |
| BIBioscrip Infusion Services INC | Ontario | CA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| BIBishamon Industries CORP | Ontario | CA | Machinery Manufacturing333924 | — | ◇ UNVERIFIED |
| BOBlack Oak Foundry | Ontario | CA | Fabricated Metal Product Manufacturing332323 | — | ◇ UNVERIFIED |
| BIBp Industries Incorporated | Ontario | CA | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| BDBravo Design and Fabrication LLC | Ontario | CA | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| BCBruce Caballero | Ontario | CA | Petroleum and Coal Products Manufacturing324191 | — | ◇ UNVERIFIED |
| BBBusy Bee Tooling | Ontario | CA | Machinery Manufacturing333514 | — | ▲ REPORTED CLOSED |
| CICaleche Investment LLC | Ontario | CA | Food Manufacturing311991 | — | ◇ UNVERIFIED |
| CDCalifornia Diesel Compliance INC | Ontario | CA | Machinery Manufacturing333618 | — | ◇ UNVERIFIED |
| CDCaltrans District 8 Ea 08-0e33u4 | Ontario | CA | Wood Product Manufacturing321114 | — | ◇ UNVERIFIED |
| CSCapital Steel Products | Ontario | CA | Fabricated Metal Product Manufacturing332323 | — | ◇ UNVERIFIED |
