| APAlger Precision Machining LLC | Ontario | CA | Fabricated Metal Product Manufacturing332721 | 100-499 | ◐ LIKELY ACTIVE |
| AIAdesa International | Ontario | CA | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| CDCalifornia Die Casting INC | Ontario | CA | Primary Metal Manufacturing331521 | 20-99 | ◐ LIKELY ACTIVE |
| IPInland Powder Coating CORP | Ontario | CA | Fabricated Metal Product Manufacturing332812 | 20-99 | ◐ LIKELY ACTIVE |
Inline Plastics, INC. | Ontario | CA | Plastics and Rubber Products Manufacturing326121 | — | ◐ LIKELY ACTIVE |
| JIJogue INC | Ontario | CA | Food Manufacturing311930 | 20-99 | ◐ LIKELY ACTIVE |
| NNNellson Nutraceutical LLC | Ontario | CA | Food Manufacturing311352 | 100-499 | ◐ LIKELY ACTIVE |
| SSimplot | Ontario | OR | Food Manufacturing311411 | — | ◐ LIKELY ACTIVE |
| SBSoup Bases Loaded | Ontario | CA | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| SMSummit Machining LLC | Ontario | CA | Fabricated Metal Product Manufacturing332710 | 20-99 | ◐ LIKELY ACTIVE |
| VSVishay Spectrol | Ontario | CA | Computer and Electronic Product Manufacturing334000 | 20-99 | ◐ LIKELY ACTIVE |
| AIAmd International Technologies LLC | Ontario | CA | Fabricated Metal Product Manufacturing332114 | — | ◐ LIKELY ACTIVE |
Fox Worx Precision LLC | Ontario | OR | Miscellaneous Manufacturing339999 | — | ◐ LIKELY ACTIVE |
Glenn B Dorning, INC. | Ontario | CA | Machinery Manufacturing333112 | — | ◐ LIKELY ACTIVE |
| JEJcm Engineering CORP | Ontario | CA | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
Klein Products, INC. | Ontario | CA | Fabricated Metal Product Manufacturing332420 | — | ◐ LIKELY ACTIVE |
Spoerr Precast Structures, LLC | Ontario | OH | Nonmetallic Mineral Product Manufacturing327390 | — | ◐ LIKELY ACTIVE |
| AJAmerican Jerky Company LLC | Ontario | CA | Food Manufacturing311111 | — | ◐ LIKELY ACTIVE |
| ASArtesia Sawdust Products INC | Ontario | CA | Wood Product Manufacturing321999 | 1-19 | ◐ LIKELY ACTIVE |
| ABAspire Bakeries Ontario | Ontario | CA | Food Manufacturing311812 | 100-499 | ◐ LIKELY ACTIVE |
| APAstro Pak Corporation - Ontario | Ontario | CA | Fabricated Metal Product Manufacturing332813 | 20-99 | ◐ LIKELY ACTIVE |
| CZCarl Zeiss Meditec Production | Ontario | CA | Miscellaneous Manufacturing339115 | — | ◐ LIKELY ACTIVE |
| CCClassic Containers INC | Ontario | CA | Plastics and Rubber Products Manufacturing326160 | 100-499 | ◐ LIKELY ACTIVE |
| CPCoastal Pacific Food Distributors, INC. | Ontario | CA | Food Manufacturing311611 | — | ◐ LIKELY ACTIVE |
| DMDanco Metal Surfacing | Ontario | CA | Fabricated Metal Product Manufacturing332813 | 20-99 | ◐ LIKELY ACTIVE |
Doble Engineering Company (Ontario, CA) | Ontario | CA | Computer and Electronic Product Manufacturing334513 | 20-99 | ◐ LIKELY ACTIVE |
| FAFortune Avenue Foods | Ontario | CA | Food Manufacturing311211 | — | ◐ LIKELY ACTIVE |
| FFFry Foods | Ontario | OR | Food Manufacturing311212 | — | ◐ LIKELY ACTIVE |
| IDIvar's Display, INC. | Ontario | CA | Furniture and Related Product Manufacturing337212 | 20-99 | ◐ LIKELY ACTIVE |
| NBNiagara Bottling, LLC - Philly St | Ontario | CA | Beverage and Tobacco Product Manufacturing312112 | 100-499 | ◐ LIKELY ACTIVE |
| PBPagliuso Brothers Slaughterhouse | Ontario | NY | Food Manufacturing311611 | — | ◐ LIKELY ACTIVE |
| PLParco, LLC | Ontario | CA | Plastics and Rubber Products Manufacturing326211 | — | ◐ LIKELY ACTIVE |
| PPhilips | Ontario | CA | Miscellaneous Manufacturing339114 | 100-499 | ◐ LIKELY ACTIVE |
| PCPrc Composites, LLC | Ontario | CA | Plastics and Rubber Products Manufacturing326130 | — | ◐ LIKELY ACTIVE |
| QCQycell Corporation | Ontario | CA | Chemical Manufacturing325211 | 20-99 | ◐ LIKELY ACTIVE |
| RIRochester Industrial Control | Ontario | NY | Electrical Equipment, Appliance & Component Manufacturing335999 | 20-99 | ◐ LIKELY ACTIVE |
| SSoupWerks | Ontario | CA | Food Manufacturing311411 | — | ◐ LIKELY ACTIVE |
| TATk America INC | Ontario | CA | Food Manufacturing311423 | — | ◐ LIKELY ACTIVE |
| TOTop Onions USA INC | Ontario | OR | Food Manufacturing311225 | 20-99 | ◐ LIKELY ACTIVE |
| TFTropicale Foods, LLC. - Ontario | Ontario | CA | Food Manufacturing311520 | 100-499 | ◐ LIKELY ACTIVE |
| ADAcademy Doors | Ontario | CA | Fabricated Metal Product Manufacturing332321 | — | ◐ LIKELY ACTIVE |
| BSBarnmaster Supply LLC Dba Marnmaster | Ontario | CA | Primary Metal Manufacturing331511 | — | ◐ LIKELY ACTIVE |
| CACox a Division of Kls Doors | Ontario | CA | Machinery Manufacturing333514 | — | ◐ LIKELY ACTIVE |
| KGKellogg Garden Products | Ontario | CA | Chemical Manufacturing325311 | — | ◐ LIKELY ACTIVE |
| OPOptimax Phase 3 | Ontario | NY | Machinery Manufacturing333310 | — | ◐ LIKELY ACTIVE |
| ROReconserve of California Ontario INC | Ontario | CA | Food Manufacturing311611 | — | ◐ LIKELY ACTIVE |
| USUS Shutters & Blinds | Ontario | CA | Wood Product Manufacturing321918 | — | ◐ LIKELY ACTIVE |
| WMWeco Metal Products | Ontario | NY | Fabricated Metal Product Manufacturing332322 | — | ◐ LIKELY ACTIVE |
| 2A2009 Anytrek | Ontario | CA | Computer and Electronic Product Manufacturing334220 | 20-99 | ◐ LIKELY ACTIVE |
| AAAlta Advanced Technologies, Inc. | Ontario | CA | Electrical Equipment, Appliance & Component Manufacturing335110 | 20-99 | ◐ LIKELY ACTIVE |