| JCJet Cutting Solutions Inc. | Ontario | CA | Plastics and Rubber Products Manufacturing326111 | — | ◇ UNVERIFIED |
| JJJ & J Enterprises | Ontario | CA | Transportation Equipment Manufacturing336390 | — | ◇ UNVERIFIED |
| JSJnl Spring Mfg., INC. | Ontario | CA | Fabricated Metal Product Manufacturing332613 | — | ◇ UNVERIFIED |
| JBJohnson Bateman CO Inc/ a Calif CORP | Ontario | CA | Nonmetallic Mineral Product Manufacturing327332 | — | ◇ UNVERIFIED |
| JCJohnson-bateman Company | Ontario | CA | Nonmetallic Mineral Product Manufacturing327332 | — | ◇ UNVERIFIED |
| JBJon Bouch | Ontario | CA | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| JVJpjw Ventures LLC Dba Pirtek Inland Valley | Ontario | CA | Fabricated Metal Product Manufacturing332912 | — | ◇ UNVERIFIED |
| KIKargo-flex INC | Ontario | CA | Transportation Equipment Manufacturing336390 | — | ◇ UNVERIFIED |
| KAKeystone Automotive Industries, INC. | Ontario | CA | Transportation Equipment Manufacturing336390 | — | ◇ UNVERIFIED |
| KEKeystone Engineering Company | Ontario | CA | Transportation Equipment Manufacturing336413 | — | ◇ UNVERIFIED |
| KLKim Lighting | Ontario | CA | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| KAKo Am Machine Company | Ontario | CA | Transportation Equipment Manufacturing336390 | — | ◇ UNVERIFIED |
| KFKomatsu Forklift USA LLC Dba Nationwide Mat'l Handling | Ontario | CA | Transportation Equipment Manufacturing336999 | — | ◇ UNVERIFIED |
| KUKost USA INC. | Ontario | CA | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| KMKovatch Mobile Equipment/fire Apparatus | Ontario | CA | Machinery Manufacturing333998 | — | ◇ UNVERIFIED |
| KFKw Food INC | Ontario | CA | Food Manufacturing311999 | — | ◇ UNVERIFIED |
| KZK & Z Cabinet CO INC | Ontario | CA | Furniture and Related Product Manufacturing337110 | — | ◇ UNVERIFIED |
| LBLa Bruna Industries INC | Ontario | CA | Wood Product Manufacturing321918 | — | ◇ UNVERIFIED |
| LILabruna Industries INC | Ontario | CA | Wood Product Manufacturing321918 | — | ◇ UNVERIFIED |
| LCLandec CORP | Ontario | CA | Machinery Manufacturing333241 | — | ◇ UNVERIFIED |
| LMLarry Methvin Installations INC | Ontario | CA | Wood Product Manufacturing321911 | — | ◇ UNVERIFIED |
| LBLatin Bakery | Ontario | CA | Food Manufacturing311811 | — | ◇ UNVERIFIED |
| LFL&b Forged | Ontario | CA | Machinery Manufacturing333517 | — | ◇ UNVERIFIED |
| LILinde INC. | Ontario | CA | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| LOLiving Oak Manufacturing CORP | Ontario | CA | Furniture and Related Product Manufacturing337215 | — | ◇ UNVERIFIED |
| LTL&j Technology | Ontario | CA | Leather and Allied Product Manufacturing316110 | — | ◇ UNVERIFIED |
| LLogoplaste | Ontario | CA | Plastics and Rubber Products Manufacturing326160 | — | ◇ UNVERIFIED |
| LALoomis Armored | Ontario | CA | Transportation Equipment Manufacturing336992 | — | ◇ UNVERIFIED |
| LMLpm Manufacturing INC | Ontario | CA | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| LPLynwood Pattern | Ontario | CA | Primary Metal Manufacturing331523 | — | ◇ UNVERIFIED |
| MMactac | Ontario | CA | Paper Manufacturing322220 | — | ◇ UNVERIFIED |
| MCMagicland Children's Dentistry & Orthodontics Dental Group | Ontario | CA | Miscellaneous Manufacturing339114 | — | ◇ UNVERIFIED |
| MIMag Instrument INC | Ontario | CA | Electrical Equipment, Appliance & Component Manufacturing335139 | — | ◇ UNVERIFIED |
| MIMag Instrument INC | Ontario | CA | Fabricated Metal Product Manufacturing332510 | — | ◇ UNVERIFIED |
| MIMag Instrument INC | Ontario | CA | Electrical Equipment, Appliance & Component Manufacturing335129 | — | ◇ UNVERIFIED |
| MIMag Instrument, INC | Ontario | CA | Electrical Equipment, Appliance & Component Manufacturing335139 | — | ◇ UNVERIFIED |
| MWManey Wire and Cable, INC. | Ontario | CA | Electrical Equipment, Appliance & Component Manufacturing335999 | — | ◇ UNVERIFIED |
| MMMansfield Metal Solutions LLC | Ontario | CA | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| MAMartinez and Sons Auto Repair | Ontario | CA | Apparel Manufacturing315210 | — | ◇ UNVERIFIED |
| MHMaterial Handling Solutions | Ontario | CA | Machinery Manufacturing333922 | — | ◇ UNVERIFIED |
| MQMaximum Quality Metal Products INC | Ontario | CA | Machinery Manufacturing333415 | — | ◇ UNVERIFIED |
| MGMcgarec Gear Machine INC | Ontario | CA | Fabricated Metal Product Manufacturing332117 | — | ◇ UNVERIFIED |
| MBMelvin Baltodano | Ontario | CA | Fabricated Metal Product Manufacturing332323 | — | ◇ UNVERIFIED |
| MWMelvin Wrought Iron & Ornamental | Ontario | CA | Fabricated Metal Product Manufacturing332323 | — | ◇ UNVERIFIED |
| MHMercy House Living Center | Ontario | CA | Transportation Equipment Manufacturing336350 | — | ◇ UNVERIFIED |
| MIMidlab, INC. | Ontario | CA | Chemical Manufacturing325612 | — | ◇ UNVERIFIED |
| MJMike Jenkins | Ontario | CA | Petroleum and Coal Products Manufacturing324191 | — | ◇ UNVERIFIED |
| MAMikronpmp Aeropace | Ontario | CA | Miscellaneous Manufacturing339991 | — | ◇ UNVERIFIED |
| MPMission Plastics INC | Ontario | CA | Plastics and Rubber Products Manufacturing326121 | — | ◇ UNVERIFIED |
| MGMondelez Global LLC | Ontario | CA | Food Manufacturing311821 | — | ◇ UNVERIFIED |
