| CBCalifornia Branch | Ontario | CA | Machinery Manufacturing333991 | 1-19 | ◐ LIKELY ACTIVE |
| CNCharter Next Generation - Ontario | Ontario | OH | Plastics and Rubber Products Manufacturing326112 | 100-499 | ◐ LIKELY ACTIVE |
| CIChunwei Inc. | Ontario | CA | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| CPCoastal Pacific Food Distributors | Ontario | CA | — | — | ◐ LIKELY ACTIVE |
| CCCollins Company | Ontario | CA | Textile Mills313310 | 20-99 | ◐ LIKELY ACTIVE |
| CCorporate | Ontario | CA | Food Manufacturing311412 | 100-499 | ◐ LIKELY ACTIVE |
| CPCorrugated Packaging Ontario S | Ontario | CA | Paper Manufacturing322211 | 20-99 | ◐ LIKELY ACTIVE |
| CUCox, USA | Ontario | CA | Nonmetallic Mineral Product Manufacturing327215 | 20-99 | ◐ LIKELY ACTIVE |
| DWDriftless Winery | Ontario | WI | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| DDsm | Ontario | CA | Chemical Manufacturing325412 | 20-99 | ◐ LIKELY ACTIVE |
| EIEnviroKinetics, Inc. | Ontario | CA | Machinery Manufacturing333249 | 20-99 | ◐ LIKELY ACTIVE |
| FAFortune Avenue Foods, Inc. | Ontario | CA | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| FAFortune Avenue Foods, Inc. | Ontario | CA | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| FGFRUIT GROWERS SUPPLY - Ontario - Carton Plant | Ontario | CA | Paper Manufacturing322211 | 100-499 | ◐ LIKELY ACTIVE |
| GDGh Dairy | Ontario | CA | Food Manufacturing311511 | — | ◐ LIKELY ACTIVE |
| HSHDT-Expeditionary Systems, Inc. Ontario | Ontario | OH | Machinery Manufacturing333413 | 1-19 | ◐ LIKELY ACTIVE |
| HTHongsheng Trading INC | Ontario | CA | Electrical Equipment, Appliance & Component Manufacturing335999 | — | ◐ LIKELY ACTIVE |
| ISIndustry Standard Vodka | Ontario | NY | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
| JPJoe Pagliuso & Bro's Inc. | Ontario | NY | Food Manufacturing311611 | 1-19 | ◐ LIKELY ACTIVE |
| KOKamps Ontario | Ontario | CA | Wood Product Manufacturing321920 | 1-19 | ◐ LIKELY ACTIVE |
| KRKMC Rubber Ontario | Ontario | CA | Plastics and Rubber Products Manufacturing326299 | 20-99 | ◐ LIKELY ACTIVE |
| LPLassonde Pappas Ontario | Ontario | CA | Food Manufacturing311421 | 20-99 | ◐ LIKELY ACTIVE |
| LCLeft Coast Brewing Co. Tasting Room Smokehouse Distillery | Ontario | CA | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
| LILMI, Inc.-Ontario | Ontario | CA | Nonmetallic Mineral Product Manufacturing327215 | 100-499 | ◐ LIKELY ACTIVE |
| MOMactac Ontario | Ontario | CA | Paper Manufacturing322220 | 20-99 | ◐ LIKELY ACTIVE |
| MIMedbreak INC | Ontario | CA | Chemical Manufacturing325413 | — | ◐ LIKELY ACTIVE |
| MWMelvin Wrought Iron Inc - Main Shop | Ontario | CA | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| MSMontalvan's Sales | Ontario | CA | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| NONa2 Ontario Tech Training Center | Ontario | CA | Transportation Equipment Manufacturing336111 | 20-99 | ◐ LIKELY ACTIVE |
| NINew Indy Containerboard Ontario | Ontario | CA | Paper Manufacturing322130 | 100-499 | ◐ LIKELY ACTIVE |
| NBNiagara Bottling, LLC - Concours St. | Ontario | CA | Beverage and Tobacco Product Manufacturing312112 | 100-499 | ◐ LIKELY ACTIVE |
| O3Ontario-3mus-ca 3m Pi | Ontario | CA | Miscellaneous Manufacturing339113 | 1-19 | ◐ LIKELY ACTIVE |
| OBOntario Barn Vineyards | Ontario | NY | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| OCOntario Container | Ontario | CA | Paper Manufacturing322211 | 100-499 | ◐ LIKELY ACTIVE |
| OPOntario Plant | Ontario | CA | Transportation Equipment Manufacturing336214 | 20-99 | ◐ LIKELY ACTIVE |
| OIOtto Instrument Services, INC. | Ontario | CA | Transportation Equipment Manufacturing336411 | 100-499 | ◐ LIKELY ACTIVE |
| PCPMR Co., Inc. | Ontario | CA | Plastics and Rubber Products Manufacturing326291 | 20-99 | ◐ LIKELY ACTIVE |
| PBPrimo Brands - Ontario Factory | Ontario | CA | Beverage and Tobacco Product Manufacturing312112 | 20-99 | ◐ LIKELY ACTIVE |
| PBPrimo Brands - West Transport | Ontario | CA | Plastics and Rubber Products Manufacturing326160 | 20-99 | ◐ LIKELY ACTIVE |
| PProtecPac | Ontario | CA | Plastics and Rubber Products Manufacturing326150 | 1-19 | ◐ LIKELY ACTIVE |
| RWRecycled Wood Prodcuts | Ontario | CA | Wood Product Manufacturing321999 | 20-99 | ◐ LIKELY ACTIVE |
| RERobinson Estates | Ontario | NY | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| RBRyder - Birchstone Ontario | Ontario | CA | Wood Product Manufacturing321920 | 1-19 | ◐ LIKELY ACTIVE |
| SHSage Hill Farm | Ontario | OR | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| SASan Antonio Winery | Ontario | CA | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| SDSan Dimas Luggage-ontario | Ontario | CA | Leather and Allied Product Manufacturing316992 | 100-499 | ◐ LIKELY ACTIVE |
| SPSchwarz Partners | Ontario | CA | Paper Manufacturing322211 | 100-499 | ◐ LIKELY ACTIVE |
| SBSoup Bases Loaded | Ontario | CA | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| SPSouth Precision Machining | Ontario | CA | Transportation Equipment Manufacturing336413 | — | ◐ LIKELY ACTIVE |
| SCSpecialty Coating Systems Ontario CA | Ontario | CA | Fabricated Metal Product Manufacturing332812 | 20-99 | ◐ LIKELY ACTIVE |