| JSJefferson Southern Corporation | Rockmart | GA | Transportation Equipment Manufacturing336111 | 100-499 | ◐ LIKELY ACTIVE |
| JEJeraco Enterprises Inc/milton Plt | Milton | PA | Transportation Equipment Manufacturing336212 | — | ◐ LIKELY ACTIVE |
| JCJet Company | Humboldt | IA | Machinery Manufacturing333111 | 20-99 | ◐ LIKELY ACTIVE |
| JGJ G Kern Enterprises INC | Sterling Heights | MI | Fabricated Metal Product Manufacturing332721 | 100-499 | ◐ LIKELY ACTIVE |
| JSJim Smith Boats INC | Stuart | FL | Transportation Equipment Manufacturing336612 | 20-99 | ◐ LIKELY ACTIVE |
| JTJin Tech America, LLC | Lagrange | GA | Transportation Equipment Manufacturing336360 | 100-499 | ◐ LIKELY ACTIVE |
John Bludworth Shipyard LLC | Corpus Christi | TX | Transportation Equipment Manufacturing336611 | 20-99 | ◐ LIKELY ACTIVE |
| JCJohnson Controls Interiors Maplewood Facility | Holland | MI | Transportation Equipment Manufacturing336360 | — | ◐ LIKELY ACTIVE |
| JMJohnson Matthey INC | Smithfield | PA | Transportation Equipment Manufacturing336390 | — | ◐ LIKELY ACTIVE |
| JMJohnson Matthey - Wayne Plt | Wayne | PA | Transportation Equipment Manufacturing336312 | — | ◐ LIKELY ACTIVE |
| JLJoon, LLC Dba Ajin USA | Cusseta | AL | Transportation Equipment Manufacturing336211 | 500+ | ◐ LIKELY ACTIVE |
| JIJost International | Greeneville | TN | Transportation Equipment Manufacturing336390 | 100-499 | ◐ LIKELY ACTIVE |
| JEJr Engineering | Barberton | OH | Fabricated Metal Product Manufacturing332999 | 20-99 | ◐ LIKELY ACTIVE |
| JWJr Wheel | Norton | OH | Primary Metal Manufacturing331319 | 100-499 | ◐ LIKELY ACTIVE |
| KTKaravan Trailers, INC | Fox Lake | WI | Fabricated Metal Product Manufacturing332999 | 100-499 | ◐ LIKELY ACTIVE |
| KIKeihin Ipt Mfg., LLC | Greenfield | IN | Transportation Equipment Manufacturing336310 | — | ◐ LIKELY ACTIVE |
| KPKendrick Plastics | Grand Rapids | MI | Transportation Equipment Manufacturing336360 | 100-499 | ◐ LIKELY ACTIVE |
| KTKentucky Truck Body | Louisville | KY | Transportation Equipment Manufacturing336212 | 20-99 | ◐ LIKELY ACTIVE |
| KFKewaunee Fabrications LLC | Kewaunee | WI | Fabricated Metal Product Manufacturing332999 | — | ◐ LIKELY ACTIVE |
| KWKey West Boats Expansion | Ridgeville | SC | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |
| KWKey West Boats :summerville | Summerville | SC | Transportation Equipment Manufacturing336612 | — | ◐ LIKELY ACTIVE |
| KOKiewit Offshore Services LTD | Ingleside | TX | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |
| KUKi USA CORP | Berea | KY | Fabricated Metal Product Manufacturing332812 | 100-499 | ◐ LIKELY ACTIVE |
| KMKlauber Machine & Gear CO | Pacific | MO | Machinery Manufacturing333612 | 20-99 | ◐ LIKELY ACTIVE |
| KHKnl Holdings,llc | Paragould | AR | Machinery Manufacturing333111 | 20-99 | ◐ LIKELY ACTIVE |
| KAKobelco Aluminum Products & Extrusions INC | Bowling Green | KY | Primary Metal Manufacturing331313 | 100-499 | ◐ LIKELY ACTIVE |
Kodiak Aircraft Company, INC. | Sandpoint | ID | Transportation Equipment Manufacturing336411 | — | ◐ LIKELY ACTIVE |
| KNKramski North America, INC. | Largo | FL | Plastics and Rubber Products Manufacturing326199 | 20-99 | ◐ LIKELY ACTIVE |
| LFLakeland Finishing INC | Grand Rapids | MI | Fabricated Metal Product Manufacturing332812 | 100-499 | ◐ LIKELY ACTIVE |
| LCLakeside Casting Solutions | Monroe City | MO | Primary Metal Manufacturing331523 | 20-99 | ◐ LIKELY ACTIVE |
| LTLamar Trailers | Sumner | TX | Transportation Equipment Manufacturing336212 | 100-499 | ◐ LIKELY ACTIVE |
| LLLaship LLC | Houma | LA | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |
| LYLazzara Yachts, INC | Tampa | FL | Transportation Equipment Manufacturing336612 | — | ◐ LIKELY ACTIVE |
| LCLear CORP | Port Huron | MI | Transportation Equipment Manufacturing336322 | — | ◐ LIKELY ACTIVE |
| LHLear Hammond | Hammond | IN | Transportation Equipment Manufacturing336360 | 500+ | ◐ LIKELY ACTIVE |
| LILearjet INC | Tucson | AZ | Transportation Equipment Manufacturing336411 | — | ◐ LIKELY ACTIVE |
| LRLear Roscommon | Roscommon | MI | Fabricated Metal Product Manufacturing332116 | 100-499 | ◐ LIKELY ACTIVE |
| LBLegacy Boats LLC Dba Avid Boats | Aberdeen | MS | Transportation Equipment Manufacturing336612 | 20-99 | ◐ LIKELY ACTIVE |
L.h. Thomson Company, INC. | Macon | GA | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| LILincoln Industries INC | Lincoln | NE | Fabricated Metal Product Manufacturing332813 | 100-499 | ◐ LIKELY ACTIVE |
Lippert Components Incorporated Plant 4 | Goshen | IN | Fabricated Metal Product Manufacturing332119 | 100-499 | ◐ LIKELY ACTIVE |
| LRLM Radiator Inc | Hibbing | MN | Transportation Equipment Manufacturing336390 | 100-499 | ◐ LIKELY ACTIVE |
| LRLoad Rite Trailers INC | Fairless Hills | PA | Transportation Equipment Manufacturing336214 | 100-499 | ◐ LIKELY ACTIVE |
| LMLockheed Martin - Waterton Plant Usaf Pj | Littleton | CO | Transportation Equipment Manufacturing336414 | — | ◐ LIKELY ACTIVE |
| LCLord Corp/erie | Erie | PA | Textile Mills313320 | 500+ | ◐ LIKELY ACTIVE |
| LSLouisville Seating Division of Magna | Shepherdsville | KY | Transportation Equipment Manufacturing336211 | — | ◐ LIKELY ACTIVE |
| LTLpi Technical Services | Chesapeake | VA | Transportation Equipment Manufacturing336312 | 20-99 | ◐ LIKELY ACTIVE |
| LILta Ii Manufacturing LLC | Ottawa | KS | Transportation Equipment Manufacturing336214 | — | ◐ LIKELY ACTIVE |
| LPLTD Parts | Sparta | TN | Transportation Equipment Manufacturing336322 | — | ◐ LIKELY ACTIVE |
| LELycoming Engines/oliver St Plt | Williamsport | PA | Transportation Equipment Manufacturing336412 | — | ◐ LIKELY ACTIVE |