| GDGerard Daniel Worldwide | Ontario | CA | Fabricated Metal Product Manufacturing332618 | — | ◇ UNVERIFIED |
| GEGk Enterprise Truck Body Builder | Ontario | CA | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| GMGlenco Manfacturing CO | Ontario | CA | Fabricated Metal Product Manufacturing332721 | — | ◇ UNVERIFIED |
| GCGold Crest Industries, Inc. | Ontario | CA | Furniture and Related Product Manufacturing337121 | — | ◇ UNVERIFIED |
| GCGraydaze Contracting | Ontario | CA | Textile Mills313310 | — | ◇ UNVERIFIED |
| GWGreat Western Eagle Packaging | Ontario | CA | Plastics and Rubber Products Manufacturing326150 | — | ◇ UNVERIFIED |
| GLGrove Land Venture LLC | Ontario | CA | Transportation Equipment Manufacturing336350 | — | ◇ UNVERIFIED |
| GLGrove Land Venture LLC | Ontario | CA | Transportation Equipment Manufacturing336350 | — | ◇ UNVERIFIED |
| HTHalbersleben Trucking | Ontario | CA | Beverage and Tobacco Product Manufacturing312112 | — | ◇ UNVERIFIED |
| HBHaldex Brake Products CORP | Ontario | CA | Transportation Equipment Manufacturing336340 | — | ◇ UNVERIFIED |
| HCHalex Corperation | Ontario | CA | Wood Product Manufacturing321999 | — | ◇ UNVERIFIED |
| HFHamilton Fixture INC Hamilton | Ontario | CA | Furniture and Related Product Manufacturing337215 | — | ◇ UNVERIFIED |
| HIHammermill Industries, INC. | Ontario | CA | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| HIHarbec INC. | Ontario | NY | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| HAHarrington Associated Ind INC Dba Harrington Mold | Ontario | CA | Machinery Manufacturing333514 | — | ◇ UNVERIFIED |
| HFHeatherfield Foods INC Dba Villa Roma Sausage | Ontario | CA | Food Manufacturing311612 | — | ◇ UNVERIFIED |
| HMHeavy Motions INC | Ontario | CA | Machinery Manufacturing333996 | — | ◇ UNVERIFIED |
| HCHenry CO | Ontario | CA | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| HFHeritage Foods | Ontario | CA | Textile Mills313310 | — | ◇ UNVERIFIED |
| HWHernandez Wrought Iron, INC. | Ontario | CA | Fabricated Metal Product Manufacturing332323 | — | ◇ UNVERIFIED |
| HPHexagon Purus Systems USA LLC | Ontario | CA | Transportation Equipment Manufacturing336992 | — | ◇ UNVERIFIED |
| HBHillerich & Bradsby CO INC | Ontario | CA | Miscellaneous Manufacturing339920 | — | ◇ UNVERIFIED |
| HHHillman Holdings LLC | Ontario | CA | Food Manufacturing311611 | — | ◇ UNVERIFIED |
| HPHi Performance Electric Vehicle Systems INC | Ontario | CA | Electrical Equipment, Appliance & Component Manufacturing335312 | — | ◇ UNVERIFIED |
| HPHi Performance Electric Vehicle Systems INC | Ontario | CA | Machinery Manufacturing333999 | — | ◇ UNVERIFIED |
| HIHubbell INC | Ontario | CA | Electrical Equipment, Appliance & Component Manufacturing335931 | — | ◇ UNVERIFIED |
| HCHuntsman Corporation | Ontario | CA | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| HSHydraulic Solutions and Supplies LLC | Ontario | CA | Machinery Manufacturing333995 | — | ◇ UNVERIFIED |
| IPInca Plastics Molding CO INC | Ontario | CA | Plastics and Rubber Products Manufacturing326121 | — | ◇ UNVERIFIED |
| IDIndustrial Design System Inc. | Ontario | CA | Furniture and Related Product Manufacturing337215 | — | ◇ UNVERIFIED |
| IDIndustrial Design System Inc. | Ontario | CA | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| ITIndustrial Threaded Products INC | Ontario | CA | Fabricated Metal Product Manufacturing332722 | — | ◇ UNVERIFIED |
| IVIndustrial Ventilation INC | Ontario | OR | Machinery Manufacturing333415 | — | ◇ UNVERIFIED |
| IGInfinity Garment INC. | Ontario | CA | Apparel Manufacturing315999 | — | ◇ UNVERIFIED |
| IFInk Fx INC | Ontario | CA | Textile Product Mills314999 | — | ◇ UNVERIFIED |
| IEInland Empire Drive Line Service INC | Ontario | CA | Transportation Equipment Manufacturing336350 | — | ◇ UNVERIFIED |
| ISInland Signs INC | Ontario | CA | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| ICInnovative Conveyor System | Ontario | CA | Machinery Manufacturing333922 | — | ◇ UNVERIFIED |
| IPInnovative Polymer Sys INC | Ontario | CA | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| ITIntegrity Tool INC. | Ontario | NY | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| IEInter-city Engery Systems, INC | Ontario | CA | Machinery Manufacturing333415 | — | ◇ UNVERIFIED |
| IIInvapharm INC | Ontario | CA | Food Manufacturing311999 | — | ◇ UNVERIFIED |
| ICIsmenia Campos | Ontario | CA | Plastics and Rubber Products Manufacturing326211 | — | ◇ UNVERIFIED |
| ICIvar's Cabinet Shop | Ontario | CA | Furniture and Related Product Manufacturing337215 | — | ◇ UNVERIFIED |
| JOJacck Oil INC. | Ontario | CA | Petroleum and Coal Products Manufacturing324110 | — | ◇ UNVERIFIED |
| JLJaecie Lopez | Ontario | OR | Fabricated Metal Product Manufacturing332323 | — | ◇ UNVERIFIED |
| JSJamac Steel, INC | Ontario | CA | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| JSJames Schneider Products INC Dba Js Products | Ontario | CA | Furniture and Related Product Manufacturing337215 | — | ◇ UNVERIFIED |
 Jensen Enterprises INC Dba Jensen Precast | Ontario | CA | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| JVJesse Villarreal | Ontario | CA | Nonmetallic Mineral Product Manufacturing327410 | — | ◇ UNVERIFIED |
