| JNJ.h. Newton L.l.c | Broken Arrow | OK | — | ◐ LIKELY ACTIVE |
| JCJ-mark Connectors INC | Wichita | KS | — | ◐ LIKELY ACTIVE |
| JPJohnstown, PA | Johnstown | PA | 100–499 | ◐ LIKELY ACTIVE |
| JOJupiter One USA LLC | Palm Bay | FL | — | ◐ LIKELY ACTIVE |
| KAKaiser Aircraft Ind. Inc. | Birmingham | AL | 20–99 | ◐ LIKELY ACTIVE |
| KKaman | Bennington | VT | 100–499 | ◐ LIKELY ACTIVE |
| KMKathleen Marie Kiesling | Fort Worth | TX | — | ◐ LIKELY ACTIVE |
| KKKemet Konnections INC | Spring | TX | — | ◐ LIKELY ACTIVE |
| KKent | Kent | OH | 20–99 | ◐ LIKELY ACTIVE |
| KKFlex | Youngsville | NC | 100–499 | ◐ LIKELY ACTIVE |
| KAKira Art Jv LLC | Blytheville | AR | — | ◐ LIKELY ACTIVE |
| KRKMC Rubber Athens | Athens | GA | 20–99 | ◐ LIKELY ACTIVE |
| KRKMC Rubber Ontario | Ontario | CA | 20–99 | ◐ LIKELY ACTIVE |
| KAKs92 Ametek Power Data Systems | Wichita | KS | 20–99 | ◐ LIKELY ACTIVE |
| KAKwd Aircraft Support Equipment LLC | Solon | OH | — | ◐ LIKELY ACTIVE |
| LWLamsco West In | Santa Clarita | CA | 100–499 | ◐ LIKELY ACTIVE |
| LRLanair Research & Development INC. | Newington | NH | — | ◐ LIKELY ACTIVE |
| LSLazy Sea LLC | Tampa | FL | — | ◐ LIKELY ACTIVE |
| LALegacy Aerospace & Defense LLC | Arden | NC | — | ◐ LIKELY ACTIVE |
| LTLehigh Technologies of Georgia | Tucker | GA | 20–99 | ◐ LIKELY ACTIVE |
| LELeonardo Electronics US - Tucson | Tucson | AZ | 100–499 | ◐ LIKELY ACTIVE |
| LMLeonards Metal INC | Auburn | WA | — | ◐ LIKELY ACTIVE |
| LTLiberty Tire Recycling - Atlanta, GA | Atlanta | GA | 100–499 | ◐ LIKELY ACTIVE |
| LTLiberty Tire Recycling - Auburndale, WI | Auburndale | WI | 20–99 | ◐ LIKELY ACTIVE |
| LTLiberty Tire Recycling - Godfrey, IL | Godfrey | IL | 20–99 | ◐ LIKELY ACTIVE |
| LTLiberty Tire Recycling - Knoxville, TN | Knoxville | TN | 20–99 | ◐ LIKELY ACTIVE |
| LTLiberty Tire Recycling - Lakewood, NJ | Lakewood | NJ | 20–99 | ◐ LIKELY ACTIVE |
| LTLiberty Tire Recycling - Live Oak, FL | Live Oak | FL | 20–99 | ◐ LIKELY ACTIVE |
| LTLiberty Tire Recycling - Minerva, OH | Minerva | OH | 20–99 | ◐ LIKELY ACTIVE |
| LTLiberty Tire Recycling - Mosinee, WI | Mosinee | WI | 1–19 | ◐ LIKELY ACTIVE |
| LTLiberty Tire Recycling - Ogden, UT | Ogden | UT | 1–19 | ◐ LIKELY ACTIVE |
| LTLiberty Tire Recycling - Savage, MN | Savage | MN | 20–99 | ◐ LIKELY ACTIVE |
Lifesaving Systems Main Office and Factory - Apollo Beach, Fl | Apollo Beach | FL | 20–99 | ◐ LIKELY ACTIVE |
| LALimco Airepair INC. | Tulsa | OK | — | ◐ LIKELY ACTIVE |
| LSLinden Street Capital CORP | Memphis | TN | — | ◐ LIKELY ACTIVE |
| LALISI Aerospace | Torrance | CA | 500+ | ◐ LIKELY ACTIVE |
| LALmi Aerospace INC | Saint Charles | MO | — | ◐ LIKELY ACTIVE |
| LVLMI - Vista | Vista | CA | 20–99 | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation Chelmsford (1553) | Chelmsford | MA | 100–499 | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation Clarksburg (1508) | Clarksburg | WV | 20–99 | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation Courtland Facility (1595) | Courtland | AL | 100–499 | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation Grand Prairie Campus (1435) | Grand Prairie | TX | 500+ | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation HOUSTON-2100 SPACE PARK DRIVE (3537) | Houston | TX | 100–499 | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation Kennedy Space Campus (1337) | Kennedy Space Center | FL | 100–499 | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation Kings Bay Campus (1559) | Kings Bay | GA | 500+ | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation Lexington Park Site (1379) | Lexington Park | MD | 1–19 | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation Lufkin (1551) | Lufkin | TX | 100–499 | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation Michoud Assembly Facility (1336) | New Orleans | LA | 100–499 | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation Ocala Campus (1383) | Ocala | FL | 500+ | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation Orlando Campus (1382) | Orlando | FL | 500+ | ◐ LIKELY ACTIVE |